Affiliates:

Business Locations:

CEMM Co., Ltd.

Nagoya Headquarters

19-1 Ukishimacho, Mizuho-ku
Nagoya-shi, Aichi 467-0854
Japan+81-52-693-0181

19-1 Ukishimacho, Mizuho-ku
Nagoya-shi, Aichi 467-0854
Japan+81-52-693-0800

Tonetsu Kohsan Co., Ltd.

Ota Plant

2-102, Sunosaki-cho
Handa-shi, Aichi, 475-0021
Japan+81-569-89-2301

997-20 Wakiyacho
Ota-shi, Gunma 373-0031
Japan+81-276-32-5800

DOWA THT America, Inc.

Mohka Plant

2130 South woodland Circle
Bowling Green, Ohio 43402
USA+1-419-354-4144

Mohka Plant
17 Kinugaoka
Mohka-shi, Tochigi 321-4367
Japan+81-285-82-7131

DOWA Thermotech North Carolina, Inc.
3305 Durham Drive, Suite 107
Raleigh, North Carolina 27603
USA

DOWA Thermotech (Thailand) Co., Ltd.
300/33 Moo 4 T.Tasit
A.Pluakdaeng Rayong 21140
Thailand+66-3895-9008

Kunshan DOWA Thermo Furnace Co., Ltd.
No.298 Jiguang South Road Shipu, Qiandeng
Kunshan, Jiangsu 215343
China+86-512-8262-5600

HIGHTEMP Furnaces, Ltd.
1C, 2nd Phase, Peenya Industrial Area,
Bangalore - 560058
India+91-80-2839-5917

PT. DOWA Thermotech Furnace
PT. DOWA Thermotech Indonesia
Jl. Maligi VI Lot G-4, Kawasan Industri KIIC,
Karawang, 41361, West Java
Indonesia+62-21-8911-4346

DOWA Thermotech Mexico S.A. de C.V.
Avenida Europa #203 del Parque
Industrial Desarrollo Logistik II,
Super Carretea San Luis-Villade Arriaga,
Laguna de San Vicente, Villa de Reyes,
San Luis Potosi. C.P.79526
Mexico+52-444-478-2000

COOL
TECHNOLOGIESFORTHE HEAT
BUSINESS

Yokohama Business Office/Kanto PE
3977-1 Ikenobecho, Tsuzuki-ku
Yokohama-shi, Kanagawa 224-0053
Japan+81-45-929-0180

Hamamatsu Plant
2-27-1 Aoinishi, Naka-ku
Hamamatsu-shi, Shizuoka 433-8111
Japan+81-53-436-5501

Hamamatsu-kita Plant
5-2-1 Somejidai, Hamakita-ku
Hamamatsu-shi, Shizuoka 434-0046
Japan+81-53-586-8041

Handa Plant
1-12 Shiohicho, Handa-shi, Aichi 475-0032
Japan+81-569-29-4861

Chuseibu PE
1-25-1 Kakimotocho,
Toyota-shi, Aichi 471-0855+81-565-28-1469

Shiga Plant
1848-10 Shimoda
Konan-shi, Shiga 520-3201+81-748-75-1991

Introduction to Industrial Furnace Business

19-1, Ukishimacho, Mizuho-ku
Nagoya-shi, Aichi 467-0854
Japan
TEL +81-52-693-0630
FAX +81-52-693-0682
MAIL tht@dowa.co.jp

www.dowa.co.jp/thermo-tech/

2019/09E

ONE STOPSOLUTIONS
Total Support

In order to support customers’ business expansion and theevolution of manufacturing, we are determined to continue
our efforts to establish and maintain a total support system
for heat treatment technologies.

Comm
Heat erci
Tr e a l
at
m

en

ance

t

Re
De seavelndh a ntrc pm e
o

Ma

inten

/
ing g
eer inE n gin ctur
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Manu

COMPREHENSIVEHEAT TREATMENTEQUIPMENTMANUFACTURER

Sale

s

Heat treatment technologies provide metals with new characteristics and capabilities.
Even now, these technologies, which have been driving the progress of civilization, arethe foundation of manufacturing, and support our affluent and comfortable lifestyles.
We have been engaged in heat treatment technologies for more than half a century.
As an industrial furnace manufacturer and expert in heat treatment processing,
we have been meeting customers’ needs that have become more diversified andsophisticated as each year passes. We have a top-class domestic track record andare proactively expanding overseas operations. We are now steadily expanding ourbusiness by taking advantage of our total support system that covers development/
manufacture, sales, and maintenance. We are determined to continue our efforts
to support customers’ business expansion and the evolution of manufacturing by
providing “ONE STOP SOLUTIONS” for heat treatment technologies.
1

MANUFACTURING
EQUIPMENT
Equipment Manufacturing/
Commercial Heat Treatment

Nanjing
KunshanSuzhou Shanghai

DOWA THT America, Inc.

HangzhouWorld Map:
Mohka Plant
Ota Plant

Kunshan DOWA Thermo Furnace Co., Ltd.

DOWA Thermotech
North Carolina, Inc.

DOWA Thermotech
Mexico S.A. de C.V.
HIGHTEMP Furnaces. Ltd.

DOWA Thermotech(Thailand) Co., Ltd.

Gurgaon■	C ountries to which our products
have been delivered

Consolidated overseas subsidiaries
of DOWA Thermotech Group(including Kunshan DOWA Thermo
Furnace Co., Ltd. in China and
HIGHTEMP Furnaces, Ltd. in India)● Equipment Manufacturing

Shiga Plant● Commercial Heat Treatment

CEMM Co., Ltd.

Handa Plant

Tonetsu Kohsan Co., Ltd.
Hamamatsu-Kita Plant
Hamamatsu Plant

Ahmedabad

PT. DOWA Thermotech Furnace
PT. DOWA Thermotech Indonesia

Pune
Nelamangara
Yeshwantpur
Bangalore (Main office)Chennai

We provide the same Japan Quality to
all customers anywhere in the world.
In the context of the need to expand overseas markets and reduce
production costs, Japanese manufacturers have been steadily expanding
operations into overseas markets. Since many of our products have been
exported outside Japan with the trend, we have started overseas
operation. In 1997, we established DOWA THT America, Inc. in North
America. Starting from the establishment of this company, we have
expanded our global network to Thailand, China, India, Indonesia,
and Mexico. Utilizing this network, we have been developing a rangeof services such as support for engineering, manufacturing andinstallation of industrial furnaces, after services, and commercial
heat treatment. We are determined to expand our overseas operation
bases in order to provide our Japan-quality industrial furnaces andtechnical support to customers all over the world.

JAPAN

INDIA

CHINA

[Description of Business][Description of Business][Description of Business]•	Manufacturing and distribution of industrial furnaces: Compact typecarburizing furnaces, continuous type carburizing furnaces, gas
nitrocarburizing furnaces, brazing furnaces, normalizing furnaces,
annealing furnaces•	Design/Manufactue industrial furnaces: Compact type furnaces,
continuous furnaces, Nitriding furnaces, Brazing furnaces, Mesh belt
conveyor furnaces, Annealing furnaces, and “Flex” carburizing furnaces.

•	Manufacture and distribution of industrial furnaces: Compact typecarburizing furnaces, continuous type carburizing furnaces, aluminum
furnaces, gas generator, various incidental equipment for heat treatment,
etc.

Hamamatsu-Kita Plant•	H eat treatment services/carburizing, quenching, Ni-based brazing,Cu-based brazing, solidification, vacuum annealing, magnetic annealing,vacuum quenching[Main Clients]•	Automobile manufacturers and parts suppliers, construction machinery
manufacturers, aircraft-related manufacturers, etc.

HIGHTEMP Furnaces, Ltd.

•	C ommercial heat treatment : Carburizing, Nitriding, Austempering,
Vacuum processing, Quenching, surface processing, etc.
•	Forging and cutting processing services.

[Main Clients]•	Automobile manufacturers and their suppliers, construction machinery
manufacturers, aircraft-related manufacturers, etc.

Kunshan DOWA Thermo Furnace Co., Ltd.

•	Heat treatment processes: Carburizing, carburizing and nitriding,quenching, surface processing, etc.
•	Maintenance services for various heat treatment processing equipment.

[Main Clients]•	Automobile manufacturers and parts suppliers, construction machinery
manufacturers, aircraft-related manufacturers, etc.

Delivery Record as of March 2019
Total 3,080 units (excluding auxiliary equipment)
2,000

1,953

1,500
1,000

538

500

260
0

Japan

2

Asia/
Oceania

169

110
China

India

50

North/South Others
America3

PLANT
ENGINEERING
U.S.A.: DOWA THT America, Inc.

World Map:

China:
Kunshan DOWA Thermo
Furnace Co., Ltd.

DOWA Thermotech
North Carolina, Inc.

■	C ountries to which our products
have been delivered

Consolidated overseas subsidiaries
of DOWA Thermotech Group(including Kunshan DOWA Thermo
Furnace Co., Ltd. in China and
HIGHTEMP Furnaces, Ltd. in India)● Plant Engineering

Thailand:
DOWA Thermotech (Thailand) Co., Ltd.

Japan: DOWA thermotech, Co., Ltd.
Yokohama Business Office/Kanto PE
Chuseibu PE

Mexico: DOWA Thermotech Mexico S.A. de C.V.
India: HIGHTEMP Furnace, Ltd.

Indonesia: PT. DOWA Thermotech Furnace

Setting up operation bases close to our worldwide customers toprovide superior technologies and technical support
To ensure that heat treatment equipment acquired by customers always operates normallyand performs at optimum levels, we place as much importance on after-sales service as we
do on the development and manufacture of equipment. We offer you a wide range of technicalsupport options such as periodic maintenance, emergency response to problems, equipment
diagnosis and improvement, relocation and removal, consulting on heat treatment systems
and heat treatment software and services for heat treatment equipment produced by othermanufacturers, and more. To provide our customers in Japan and around the world with total
support, we are committed to improving our service bases and increasing the number of
specialized engineers.
Chuseibu PE
Kakimotocho, Toyota-shi, Aichi

Equipment maintenanceHeat treatment consultation

Our experienced plant engineers willquickly respond to unexpected problems,
breakdowns, and failures. We provide
detailed support for recovery of importantequipment based on our years of experienceand data accumulated over many years.
We also offer preventive maintenancefor your equipment to prevent equipment
failures and to maintain equipment in
an optimum state. After diagnosing yourexisting equipment, we will provide youwith advice on improvement measures(safety enhancement, energy efficiency
improvements, productivity enhancement,etc.) and for updating equipment using
leading-edge technology.

Being not only a heat treatment equipment
manufacturer, but also a commercial heat
treater, we develop and manufacture superiorindustrial furnaces as well as design plants
and build FA systems in order to improvesafety and production efficiency. Utilizing
our know-how, we provide our customers
with tailored support that meets all theirneeds, including consultation involving
expansion or modification of equipment.

Approach to environmental
issues and recycling
We not only engage in the manufactureand sales of heat treatment equipment
but also leverage the strengths of DOWA
Group’s unique recycling-oriented businessto focus on responding to environmental
and recycling regulations that have become
increasingly stringent in recent years. We
support the growth of our customers and,contribute to the development of people
and the environment, as well as respond tochanges in society thorough the provisionof consistent service, including removal ofequipment, control of refractory ceramic
fibers, removal of asbestos, and disposalof waste bricks.

Yokohama business office (Kanto PE)
Yokohama, Kanagawa

4

5

GLOBALOPERATIONSRESEARCH &DEVELOPMENT
NagoyaHeadquarters

Creating the future of heat treatment through collaborative development ofelemental and applied technologies.
The quality and functionality of metal parts continue to be improved. Heat treatment technologies
are always required to be continually improved. In addition to elemental and applied technologies,
research and development of technologies that reduce heat treatment costs and environmental loads
has been a continual focus within our company. We established a new R&D center in 1993 with the latest
evaluation analysis equipment, analyzers, and measuring devices. Defined as an open laboratory, thecenter conducts collaborative development of next-generation industrial furnaces and heat treatment
processing technologies together with customers.
In addition, the center provides prompt support to customers to enable them to solve problems that
occur with little warning such as unexpected quality deterioration or fluctuations. To identify causes
and solve problems, the center conducts componential analysis of the target metal material in
addition to inspections and equipment validation.

Hanoi

ManilaBangalore

R&D Center (Hamamatsu-kita)

Bangkok

Improving services for our regionalcustomers through localization of
procurement and sales functions

R&D Center (Nagoya)Jakarta

In 2016, we established a Global Operations Division (Thailand Office) for ASEAN
countries and India to promote the localization of primary functions of our equipment
and maintenance business. We respond quickly to our customers who are accelerating
overseas operations by strengthening the structure of our existing engineering bases,
utilizing manufacturing processes in India, and purchasing parts locally.

Experiment/demonstration equipment

Mutually complementary functions among bases in
ASEAN countries and India• E xpanding industrial furnace business based on HIGHTEMP's facility
manufacturing functions• Promoting local procurement of equipment and service parts• Increasing mobility of resources to strengthen the network(Next-generation) Decompressed
carburizing furnace

Plasma nitriding experimentequipment

PVD spattering experimentequipment

Vacuum degreasing and sintering
furnace

Laser Raman spectrophotometer

Scratch tester

Evaluation analysis equipment

Global Operations Division (Thailand Office)6

HIGHTEMP Furnaces, Ltd.

S-TKM Series Heat Treatment Furnace(Made by Hightemp Furnaces, Ltd.)

X-ray analysis measuring equipment

Residual stress measuring equipment

7

CUSTOMERSERVICEThe Training Center

Our training on the operation and maintenance of equipment
develops local engineers.

IoT Solutions

We flexibly and solidly support customers' heat treatment processing
through visualization of the operating status of equipment.

Our first priority is “Provide the same quality as is provided in Japan”. This does not simply mean
the quality and performance of industrial furnaces themselves. The preciseness of the service andinspections carried out after installation, and the promptness and adequacy of the maintenanceprovided in case problems occur are part of the quality we place importance on. To enable this,we have established a training center that provides local staff with training in equipment maintenanceand equipment operations, as well as education on heat treatment. Based on our experience andrequests from customers, we have prepared a range of training programs and teach know-how related toindustrial furnace maintenance and the basics of heat treatment. Besides the training center in Japan,
we established training centers in four Asian countries to enhance and strengthen our human resources.
Course Name

Target Trainees

Training Objectives

Maintenance andRepair

Maintenance Personnel
and Operators

To acquire skills required to execute periodic maintenanceand replace consumables correctly and safely

Operators

To acquire skills required to assure safe operations while
maintaining appropriate heat treatment quality levels

Engineers

To acquire necessary inspection method abilities andskills required to solve heat treatment-related problems
To master how to set heat treatment conditions

Operation
Introduction to
Heat Treatment

Maintenance Parts

We provide the latest IoT technology that reduces delay risks as well as optimizing equipment
maintenance operations by using data on manufacturing control and facility operations.

Condition monitoring of each furnace
Overall operating conditions of equipment can be assessed by a mother plant throughconstant monitoring of equipment at each manufacturing base. Such constant monitoring
system keeps defective products to a minimum by utilizing furnace condition data collectedby an existing FA system to raise an alarm in the event of a fault (e.g. if a process value
exceeds the upper or lower limit setting value). It also notifies operators of periodic parts
replacement timing, minimizing production equipment downtime.
PLC (sequencer)

Preventive
maintenance server

F1

Internet connection

Vibration
error

Providing total support for heat treatment processes

F2

Automatic
broadcastingF3

F2 vibration
error occurred!

HQ/Mother plant

Visual and audio
communication

Error notification via a tablet or smart device

Our support activities range from the development of the latest FA systems for heat treatment processcontrol and quality control and their peripheral devices, to timely procurement of maintenance parts.
Utilizing our broad experience in heat treatment processes, we are committed to providing total support
in this area to customers. We have sufficient quantities of locally procured service parts in stock
managed by our Global Operations Division at domestic and overseas plant engineering bases in orderto quickly respond to unexpected equipment problems or failures.

Remote support
In the event of an equipment failure at a production base, wearable devices or tablets canbe used to share information about the situation among site workers and supervisors.
We support site recovery via remote control.
Site worker

Supervisor

Preventive maintenance system
FA system

Heat-resistant steel jig

Maintenance parts

The system utilizes the latest IoT technology to monitor equipment on a continuous basis.
It is capable of determining the degradation of equipment and allows operators to replaceparts at the appropriate time. It allows you to reduce expenses that are normally used
to replace unnecessary parts as well as labor costs related to maintenance. It maintains
productivity and improves safety by preventing failures caused by equipment degradation or
problems thereof, and preventing loss of performance.

Unexpected and emergency
maintenance costs

Ordinary maintenance costs
Logistics center

8

Costs of parts transportation,
extended repair costs,
costs for delayed shipments,
costs arising from defectives,
etc.

Preventive maintenance makes it
possible to reduce unexpected andemergency maintenance costs.

Construction costs

Construction costs

Parts costs

Parts costs

Conventional

Preventive maintenance system
introduced

9

INDUSTRIAL
FURNACES

Full Automation

Pre Washing MachineThis equipment removes rust prevention/
cutting oil that have adhered to workpieces
during the forging or machining process.
This operation improves the quality of the
carburizing process and other heat treatment
processes. The degreasing furnace may beinstalled for cleaning / preheat in order toreduce energy usage during heat treatment.

DOWA Thermotech’s Ultra Energy-saving Industrial Furnace

Semi Continuous Furnace
Since this furnace can be installed in an areawith the same dimensions as those required
for a batch type furnace, productivity can be
improved and running costs reduced.

High-functionality heat insulationmaterial reduces heat radiationon the furnace walls.
High-functionality, fine-porous heatinsulation material is used for theouter layer of wall. The structure
minimizes heat transfer and preventsloss of heat energy in the furnace.
In addition, the safety of the work
environment is enhanced because
the surface temperatures of
furnace walls is lowered.

Regeneration gas burners
save energy and reduce
environmental loads.
The combustion heating system isequipped with regeneration gas
burners as standard component,
which enables effective use of
exhaust heat to reduce energy
consumption. In addition, we conductsimulation analysis of atmospheregases in furnaces to optimize thelocations/number of gas inlets.
Energy saving and environmental
friendly system is provided.

50ºC
Surfacetemperature

Super
Board
Highfunctionality
heat
insulationmaterial

SilicaBoard

Ceramics

Post Washing Machine

950ºC

This equipment removes oil that has adhered toworkpieces while they were being oil quenchedafter heat treatment.

Furnacetemperature

Tempering FurnaceThis furnace reheats workpieces that havebeen hardened by quenching, in order toincrease viscosity. A high- or low-temperaturetempering furnace can be selected according
to the specification.

Ceramic fibers with superior
heat insulation capacity are used.

S-TKM series

Meeting diversified market needs by incorporating our reliable
technologies and unique ideas into products.
Performance criteria for industrial furnaces are becoming increasingly diversified year
on year. In addition to improved heat treatment quality, criteria include reduced runningcosts, energy usage, environmental loads, processing time, dimensions, and more. To meetdemands such as these, we are striving to develop a range of innovative technologies related
to the entire heat treatment process including industrial furnace bodies, temperature-raising
structures, automatic conveyor systems, and associated equipment. We satisfy customer
requirements by providing a wide range of products and customize details.

10

Ceramic fibers with superior heatinsulation capacity are used for thesecond layer of walls of furnaces.
Covering the interior of the furnace
body with superior heat insulationmaterials increases combustion
efficiency and significantly reduces
energy costs. Use of ceramic fibers
also reduces the weight of industrial
furnaces, which also helps reduce
foundation and other installation costs.

Providing our unique equipment and know-how to support new plantsfrom the planning stage to the start of mass production.
Since heat treatment equipment must beplanned according to factors such as intended
metal materials, processes, and production
volumes, equipment specifications differ bycustomer. Therefore, our staff participate
in construction projects of new productionlines from the kickoff stage in order to gain
an understanding of the types of parts to beprocessed, required heat treatment conditions,production plans, and other details. We
offer heat treatment equipment plans thatare suitable for customers’ new production
plants by selecting the optimum industrial

furnaces and associated equipment based on
customers’ customization-related requests.
We also recommend an equipment layout that
improves efficiency and ensures the safety of
production area. We attend and monitor mass
production tests carried out after equipment
has been installed and provide prompt
support in case problems occur. We provide
comprehensive support for floor plan on thebuilding, customize furnace specification
and also for mass production based on our
extensive know-how and mutual trust we havebuilt up with customers.

11

PRODUCT
LINEUP

Product Lineup of Industrial Furnaces
TKM Series
Heat Treatment Furnace

S-TKM Series
Heat Treatment Furnace

Hybrid Type Continuous
Gas Carburizing Furnace

Ultra Energy-saving Continuous
Quenching Furnace(U-TGRT)

Roller Hearth Type Continuous
High-temperature Carburizing
and Quenching Furnace

Sooting-free Endothermic
Gas Generator• Shortens total lead time by 20%.

•	C ompact and slim continuous furnace
designed to save space.

•	Uses a tray pusher system and a roller hearthsystem together.

•	U ltra energy-saving: Reduces energy costs
by approximately 70%.

•	D emonstrates productivity that is
approximately three times that of conventional
batch type furnaces.

•	Reduces energy costs by approximately 40%
through use of high-efficiency regeneration
gas burners.

•	Reduces CO 2 emissions per unit weight byapproximately 70%.

•	U se of large-capacity regeneration gas
burners provides the ability to rapidly raise
temperatures.

•	Heating by using swirl flow type regeneration
gas burners significantly reduces production
costs of converted gas.

•	Use of a large-airflow diffusing fan minimizes
temperature distribution.

• Significantly reduces energy costs.

•	Decreases CO 2 emissions per unit weight byapproximately 30%.

•	N ew mechanisms such as double-path
type retort, pulseless blower, and a special
heating system are employed.

•	S aves energy by using high-efficiency
regeneration gas burners.
•	Reduces CO 2 emissions by more than 30%
to improve environmental performance.
•	S ignificantly reduces furnace body surface
temperature by using a new heat-insulated
structure.

•	S hortens the furnace lead time byapproximately 30%.
•	S pace-saving design reduces installation
area requirements by approximately 40%.

•	S hortens carburizing time to significantly
reduce treatment costs.

•	Electrical heating gas generators that can beinstalled in the same sized area as those ofgas heating type gas generators are available.

Other products related to industrial furnaces
Cell Type Vacuum
Carburizing Furnace (V-TKM)

Atmosphere Continuous Furnace
L-TKM for Small-lot Production

Plasma Nitriding Furnace

Aluminum AlloyHeat Treatment Furnaces

Vacuum Degreasing and
Sintering Furnace

Carbon Potential Meter•	Q uickly responds to variations in production
demands, maximizing the advantage ofsmall-lot production and vacuums.

•	M eets variations in demand and production.

•	U niform temperature distribution anduniform heating.

•	Automated solution heat treatment, quenching
and aging treatments.

•	C ontinuous treatment from degreasing tosintering significantly increases the yield ratio.

•	T he use of a simple mechanism ensuressustainable control of non-defective products
and stable operations via a simple, easy-tooperate and easy-to-maintain design.

•	C an now control temperature zones, thereby
enabling large equipment to carry out uniform
bulk treatment.

•	P recipitation hardening of aluminum alloys.

•	Versatile energy-saving equipment withminimal loss of time.

•	D egreasing time is considerably reduced byusing paraffin wax degreasing in a strong
vacuum conditions.

•	T his meter can directly measure the carbon
concentration in the atmosphere gas thatis used for heat treatment (carburizing,
thermal refining, etc.) of steel.

•	A furnace that does not require workers’
skills and experience.

•	I t is cost-competitive even for small-lot
production.

•	S ince electrical discharge is not performedat room temperature, abnormal discharge(i.e. arching) issues are reduced.

12•	Improving mechanical characteristics ofaluminum including corrosion resistance,
workability, and thermal and electricalconductivity.

•	U sing a gas inflow system and dedicatedretort boxes to increase degreasing capacity.

•	H ighly advanced measuring equipment thatis reliable and easy to operate.

13

COMPANYPROFILE
Company Profile
Company Name: DOWA Thermotech Co., Ltd.
Established:

May 2007

Capital:1 billion yen

Headquarters:

Nagoya-shi, Aichi

Representative: Ryuji Tsuji (President and Representative Director)
Affiliates:	DOWA Thermoengineering Co., Ltd., CEMM Co., Ltd., Tonetsu Kosan Co., Ltd.,
DOWA THT America, Inc., DOWA Thermotech North Carolina, Inc.,
DOWA Thermotech (Thailand) Co., Ltd., Kunshan DOWA Thermo Furnace Co., Ltd.,HIGHTEMP Furnaces, Ltd., PT. DOWA Thermotech Indonesia,
PT. DOWA Thermotech Furnace, DOWA Thermotech Mexico S.A. de C.V.
Description of Design, manufacture, sales, and maintenance of heat treatment equipment,
Business:	heat treatment processing, surface treatment processing, and surface
modification processing

Company History
1958	Tokyo Netsushori Kogyo Co., Ltd. established.
Yokohama plant commenced operations.
Yokohama factory commenced operations.
1968

Nagoya factory commenced operations.

1973

Moka plant commenced operations.

1981

Shiga plant commenced operations.

1985

Technology licensed to HIGHTEMP (India).

1987	Toyota plant commenced operations.
Hamamatsu plant (former Tenryu Netsushori Kogyo Co., Ltd.)
commenced operations.
1990

Handa plant commenced operations.

1991	Merged with DOWA Mining Co., Ltd. Thermotech business operational
headquarters established.
1997

DOWA THT America, Inc. established.

2006	Holding company system implemented.
(DOWA Mining Co., Ltd. changed its name to DOWA Holdings Co., Ltd.)
CEMM Co., Ltd. joined DOWA Group.
2008	DOWA Thermotech (Thailand) Co., Ltd. established.
Ota plant commenced operations.
Headquarters relocated to Nagoya-shi, Aichi.
2010	Kunshan DOWA Thermo Furnace Co., Ltd. established.
2011	R&D center established in Nagoya-shi, Aichi.
Acquired a controlling interest of HIGHTEMP Furnaces, Ltd. in India.
2012	PT. DOWA Thermotech Indonesia established.
PT. DOWA Thermotech Furnace established.
2015	Hamamatsu-kita plant commenced operations.
DOWA Thermotech Mexico S.A. de C.V. established.

14

2016

Global Operations Division (Thailand Office) established.

2017

R&D center established in Hamamatsu-shi, Shizuoka.

2018

DOWA Thermotech North Carolina, Inc. established.