Abstract The invention provides a method of joining a first hard metal carbide article and a second article (preferably steel), said second article having a higher coefficient of heat expansion than said first article comprising positioning said articles adjacent each other and applying brazing filler metal to the joint between said articles and heating said brazing filler metal sufficient to braze said first and second articles together along said joint and then cooling said articles to obtain a permanent joint between them; and cooling said second article, while said brazing filler metal is being heated, sufficiently so that the amount of contraction of said second article during the cooling period subsequent to the brazing is substantially of the same magnitude as the contraction of said first article. The invention is particularly applicable to the production of elongated articles and of rimmed wheels and includes such novel composite articles.
The method of claim 1 wherein said second article is cooled by contacting said article with a hollow metal plate and passing cooling water through said hollow metal plate to cool said second article.
Claim 2
Dependent Claim
24 words
The method of claim 2 wherein said second article is a steel article, and said brazing filler metal is a silver-base brazing filler metal.
Claim 3
Dependent Claim
16 words
The method of claim 2 wherein said brazing filler metal is a copper-base brazing filler metal.
Claim 4
Independent Claim
119 words
The method of joining an elongated hard metal carbide article with a second article, said second article having a higher coefficient of heat expansion than said hard metal carbide article comprising positioning said articles adjacent each other and applying brazing filler metal to the joint between said articles and heating said brazing filler metal sufficient to braze said articles and then cooling said articles to obtain a permanent joint between them; and cooling said second article, while said brazing filler metal is being heated, sufficiently so that the amount of contraction of said second article during the cooling period subsequent to the brazing is substantially of the same magnitude as the contraction of said elongated hard metal carbide article.
Claim 5
Dependent Claim
14 words
The method of claim 5 wherein said second article is a ferrous metal article.
Claim 6
Dependent Claim
14 words
The method of claim 6 wherein said second article is a hardened steel article.
Claim 7
Dependent Claim
35 words
The method of claim 7 wherein said second article is a steel rail and said hard metal carbide article is a continuous strip surfacing at least a portion of one surface of said steel rail.
Claim 8
Dependent Claim
34 words
The method of claim 7 wherein said second article is a wheel and wherein said elongated hard metal carbide article is a ring which is positioned and brazed around the periphery of said wheel.