Related patent(1/3)

Tohoku Univ. Technology

This invention is9g/cm3 which is 10%
lighter thanconventional
molybdenum alloy(approx.10g/cm3)

Mo-Si-B-Ti-C alloy
Formation of high-strength / high-rigidity / highheat-resistant Mo alloy that can be cast (able tomelt under 2000℃)! Equivalent to Ni-based alloy!

（White）Mo（Gray）Mo5SiB2This invention（Black）TiC

Effect

T[ ℃]

E[GPa]

Currently, molybdenum alloys are formed by extrusion ofpowder sintered bodies due to their high melting point.
Therefore, cutting is required in order to form complex
shapes, which increases the manufacturing cost. In addition,
if a body is formed by the powder sintering, the strength isdecreased.
In this invention, light / high strength / high heat resistancemolybdenum alloys can be easily fabricated by the melting
and casting method, which can be applied for complex
shapes. New molybdenum alloys with melting point below
2000℃.

σ[MPa]

Summary

Product Application
 Machining tools for friction stir welding, etc.
 Special molds
 High-pressure turbine blades for jet engines, etc.
 High-temperature, high-pressure vessels.
IP No.
Inventor
Admin No.

T[ ℃]

Contact

IP Data： JP 5876943： YOSHIMI Kyosuke, MARUYAMA Kouichi, GOTO Takashi,etc.
：Ｔ12-109

Tohoku Techno Arch Co., Ltd.
Please visit CONTACT here

Related patent(2/3)

Tohoku Univ. Technology

High-temperature strength
Mo-Si-B alloy

SEM picture of this invention Mo-Si-B alloy
ingot with TiC：ZrC＝8：2 after castingHigh temperature strength improvement byadding TiC and ZrC in Mo-Si-B alloy
EffectProduct Application

This invention

StressNon-cooling high temperature material is needed to run heat engine
such as jet engine or gas turbine with high efficiency. Mo-Si-B alloy
having high melting point and high temperature strength was focus frombefore but its property improvement is required. Moreover, Mo-Si-B
alloy has high densityand poor fracture toughness level at room temperature.
This invention can provide improved high temperature strength Mo-Si-B
alloy including its manufacturing process, and also the tool of friction stirwelding applicable for Ni-base superalloy and Ti alloy. By adding TiC
and ZrC to Mo-Si-B allow simultaneously, the strength of Mo-Si-B isincreased significantly. Moreover, this invention’s Mo-Si-B keeps hightemperature strength level with lower density and higher fracture
toughness level at room temperature compared to the conventional MoSi-B alloy.

Peak stress

Summary

Temperature
Temperature dependency of peak stressafter homogenization heat treatment onhigh temperature compression test of thisinvention Mo-Si-B alloy

Related Works

StrainHigh temperature compression test of
this invention Mo-Si-B alloy, 65Mo-5Si10B-5TiC-5ZrC large ingot after casting Tool for friction stir welding (FSW) Jet engine
 Hot extrusion die Gas turbine, high pressure turbine wings for power
generation

Contact

IP DataIP No.
InventorAdmin No.

： JP 6841441： YOSHIMI Kyosuke, NAKAYAMA Shunichi, et al.
： T16-055

Tohoku Techno Arch Co., Ltd.
Please visit CONTACT here

Related patent(3/3)

Tohoku Univ. Technology

Oxidation resistant Mo-Si-B-Ti-Calloy

SEM picture of this invention Mo-Si-Ti-C
alloy after homogenized heat treatment

High resistance to oxidation up to at least
800℃
EffectSummaryResearch on non-cooling high temperature material is conducted inorder to run heat engine such as jet engine or gas turbine with highefficiency. Mo-Si-B alloy is focus for its high melting point and hightemperature strength. However, in order to applicate to high pressure
turbine wings, the sliding friction will be generated at the interface
between the turbine wings and the turbine disc. Therefore, the oxidation
resistance at sliding friction temperature （approx. 700～ 800℃）
needs to be improved.
This invention can provide Mo-Si-B-Ti-C alloy with high oxidation
resistance property at least until approx. 800℃, and its manufacturingprocess. The Mo-Si-B-Ti-C alloy of this invention includes Mo, Si, Ti, C
and Cr and/or Al. Compared to Mo-Si-B-Ti-C alloy without Cr / Al, thisinvention is more light and hard. It can be manufactured by casting so
there is possibility to upsize Mo-Si-B-Ti-C alloy.

Product ApplicationThis invention

Oxidation resistance results of thisinvention Mo-Si-Ti-C alloy after
homogenized heat treatment

Related Works

High temperature compression test
results of this invention Mo-Si-Ti-C
alloy after homogenized heat treatment

Tool for friction stir welding (FSW)Hot extrusion die
Gas turbine, high pressure turbine wings for power generation
Jet engine

IP Data
IP No.
Inventor
Admin No.

Contact： JP 2020-2451： YOSHIMI Kyosuke, et al.
： T17-137

Tohoku Techno Arch Co., Ltd.
Please visit CONTACT here

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