Improvements relating to the Fusing of Chromium and similar Metals, and, to the Manufacture of Alloys of such Metals.
Year: 1896

page_text: Date of Application, 6th June, 1896
Complete Specification Loft 6th Mar 1907 Accepted
22nd Move
907
Date of Application, 6th June, 1896
Complete Specification Loft, 6th Mor, 1807 Accepted, 22nd May,
1907
PROVISIONAL SPECIFICATION.
Improvements relating to the Fusing of Chromium and similar
Metals, and, to the Manufacture of Alloys of such Metals.
I, ERNEST AUGUSTE GEORGES STREET of 95 Bulevard Beaumarchais, Paris,
in the Republic of France, do hereby declare the nature of this invention to be as
follows:-
This invention relates to certain improvements in the fusing of chromium and
other similar metals and in the manufacture of their alloys with the usual metals.
By metals similar to chromium, I refer to molybdenum, tungsten, uranium, and
alloys of such metals, either with each other or with chromium and I desire it to
be understood that whenever, in this specification, chromium is referred to, all
that is stated in regard to it applies also to the metals specified above and to their
alloys.
The fusion of chromium necessitates the employment of unusually high
temperatures, and when such fusion is performed in ordinary crucibles capable
of resisting the temperatures used, the result is that the chromium becomes
contaminated by the very material constituting the crucible. Thus, carbon
crucibles or receivers will carburize the metal, and thereby deprive it of certain
properties which it is important the metal should retain.
In order to obviate this inconvenience, I propose, in accordance with this
invention, to line the crucibles or receivers with oxide of chromium; which I do
as follows, that is to say: In a convenient crucible or receiver I melt a certain
amount of borax, cryolite, chloride of sodium, fluoride of calcium, or a mixture of
these bodies, with oxide of chromium which remains in suspension in the melted
mass. Having done this, I cover the inner surface of the crucible with a coating
or lining of the melted mixture. The crucible may, or may not, be heated
preparatory to this operation; and in applying the lining-material, such crucible
should be inclined, successively, in different directions, so that the melted material
may evenly cover all parts of its internal surface, and form a protective covering
therefor.
The above described method of lining crucibles intended for fusing chromium is
applicable without any modification, to the preparation of crucibles or receivers
for the production of alloys of chromium with the usual metals.
Dated this 6th day of June 1896.
HASELTINE, LAKE & Co.,
45 Southampton Buildings, London, W.C., Agents for the Applicant.
Improvements relating to the Fusing of Chromium and similar
Metals, and to the Manufacture of Alloys of such Metals.
I, ERNEST AUGUSTE GEORGES STREET, of 95 Boulevard Beaumarchais Paris,
in the Republic of France, do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement:-
This invention relates to certain improvements in the fusing of chromium and

page_text: other similar metals and in the manufacture of their alloys with the usual metals.
By metals similar to chromium, I refer to molybdenum, tungsten, uranium, and
alloys of such metals, either with each other or with chromium, and I desire it to
be understood that whenever, in this specification, chromium is referred to, all
that is stated in regard to it applies also to the metals specified above and to their
alloys.
The fusion of chromium necessitates the employment of unusually high
temperatures, and when such fusion is performed in ordinary crucibles, capable
of resisting the temperatures used, the result is that the chromium becomes
contaminated by the very material constituting the crucible. Thus, carbon
crucibles or receivers will carburize, the metal, and thereby deprive it of certain
properties, which it is important the metal should retain.
In order to obviate this inconvenience, I propose, in accordance with this
invention, to line the crucibles or receivers with oxide of chromium; which I do
as follows, that is to say: In a convenient crucible or receiver I melt a certain
amount of borax, cryolite, chloride of sodium, fluoride of calcium, or a mixture of
these bodies, with oxide of chromium, which remains in suspension in the melted
mass. Having done this, I cover the inner surface of the crucible with a coating
or lining of the melted mixture. The crucible may, or may not, be heated
preparatory to this operation; and in applying the lining-material, such crucible
should be inclined, successively, in different directions, so that the melted material
may evenly cover all parts of its internal surface, and form a protective covering
therefor.
The above described method of lining crucibles intended for fusing chromium, is
applicable, without any modification, to the preparation of crucibles or receivers
for the production of alloys of chromium with the usual metals.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is:-
The improvements hereinabove described in the (method of) fusion of chrome,
molybdenum, tungsten, uranium, or alloys of such metals, either with each other
or with chrome, and in the manufacture of alloys of the said metals with the usual
metals, consisting in lining the crucibles, wherein either the fusion of, or the
process of alloying, metals is to take place, with the oxide of the corresponding
metal (such as chrome, molybdenum, tungsten, uranium); the method of lining
consisting in melting borax, cryolite, chloride of sodium, or fluoride of calcium, or
a mixture of these bodies, with an addition of the oxide of the metal to be melted
or alloyed, and in coating the inner wall of the crucible to be lined, with the melted
mass or material thus obtained; the operation of coating being performed by any
suitable means.
יונית
HASELTINE, LAKE & Co.,
45 Southampton Buildings, London, W.C., Agents for the Applicant.