A Method of and Composition for Hardening and Strengthening Steel.
Year: 1899

page_text: Date of Application, 15th Apr., 1899
Complete Specification Left, 15th Jan., 1900-Accepted, 10th Mar., 1900
PROVISIONAL SPECIFICATION.
A Method of and Composition for Hardening and Strengthening
Steel.
I, HENRI MATON, of 4, Rue Chécle au Hutin, Roubaix, Nord, in the Republic of
France, do hereby declare the nature of this invention to be as follows:-
My invention relates to the treatment of steel by a novel composition or product,
the said composition being in the state of powder and designed to harden, renovate or
strengthen steel tools.
The composition of my novel product is as follows
These substances are mixed after being finely pulverized and sifted. I take the
powder of borax and the powdered sal-ammoniac and mix them intimately; I
then add the common salt and mix; and lastly I add the resin. When the whole
has been well mixed. I sift it
80 as to avoid any agglomeration of the
substances under the action of the resin. The product obtained has a whitish.
appearance.
The improved powder is employed as follows, that is to say, the steel to he
treated is heated to a cherry red heat and is then plunged into the powder and
turned over until it is uniformly covered with a layer of the powder of some milli-
metres more or less in thickness according to the dimensions of the steel under
treatment. The steel is then again placed in the fire and again brought to a cherry
red heat, after which it is plunged into water in the ordinary manner.
This treatment has as a result, firstly, to render the steel at least ten times more
resistant and more rigid than it was before the treatment; secondly, in the case of
burnt steel it is rendered at least ten times inore resistant and more rigid than it was
in its original state and, thirdly, tools, tempered according to the process above
described, last at least ten times as long as they would otherwise do and consequently
effect a considerable economy in work and tools.
A Method of and Composition for Hardening and Strengthening
Steel.
I, HENRI MATON, of 4, Rue Chécle au Hutin, Roubaix, Nord, in the Republic of
France, do hereby declare the nature of this invention and in what manner the same
Prime 81

page_text: is to be performed, to be particularly described and ascertained in and by the
following statement :-
My invention relates to the treatment of steel by a novel composition or product,
the said composition being in the state of powder and designed to harden, renovate
or strengthen steel tools.
The composition of my novel product is as follows :-
These substances are mixed after being finely pulverized and sifted. I take the
powder of borax and the powdered sal-ammoniac and mix them intimately; I then
add the common salt and mix; and lastly I add the resin. When the whole
has been well mixed I sift it so as to avoid any agglomeration of the
substances under the action of the resin. The product obtained has a whitish
appearance.
The improved powder is employed as follows,-that is to say, the steel to be
treated is heated to a cherry red heat and is then plunged into the powder and
turned over until it is uniformly covered with a layer of the powder of some
millimetres more or less in thickness according to the dimensions of the steel under
treatment. The steel is then again placed in the fire and again brought to a cherry
red heat, after which it is plunged into water in the ordinary manner.
This treatment has as a result, firstly, to render the steel at least ten times more
resistant and more rigid than it was before the treatment; secondly, in the case of
burnt steel it is rendered at least ten times more resistant and more rigid than it was
in its original state and, thirdly, tools, tempered according to the process above
described, last at least ten times as long as they would otherwise do and consequently
effect a considerable economy in work and tools.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what I
claim is:
-
1. As a new product a powder for regenerating and strengthening steel tools the
said powder being formed of the intimate mixture in the manner above described
and in about the following proportions of borax 307 grammes, sal-ammoniac
231 grammes, common salt 231 grammes and resin 231 grammes, these propor-
tions admitting of more or less slight modifications without in any way affecting the
properties of the powder.
2. Treating new or burnt steel by means of the powder described in Claim 1
the said treatment consisting in heating the steel to a cherry red heat, plunging it
into the powder and turning it so that it becomes covered with a uniform layer of
the powder of sufficient thickness, replacing it in the fire to again bring it
to a cherry red heat and then plunging it into water in the ordinary manner,
substantially as set forth.
Dated this 15th day of January 1900.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.