Stock material or miscellaneous articles – All metal or with adjacent metals – Having metal particles
Patent
1987-10-20
1989-09-19
Lechert,, Jr.
Stock material or miscellaneous articles
All metal or with adjacent metals
Having metal particles
419 6, 419 13, 419 15, 419 17, 419 18, 419 49, 428552, 428565, G22F 300
Patent
active
048680656
ABSTRACT:
An alloy tool of hard metal has a working part and a non-working part. The working part is made of a hard metal containing carbide of at least a metal selected from a group of elements belonging to the groups IVa, Va and VIa of the periodic table as a basis metal of the hard phase and an iron family metal as a basis metal of the binder phase. The working part includes a region for working a work piece. The non-working part is made of a hard metal containing carbide of at least a metal selected from a group of elements belonging to the groups IVa, Va and VIa of the periodic table as a basis metal of the hard phase of the non-working part and of an iron family metal as a basis metal of the binder phase of the non-working part. A diffused junction between the working and non-working parts bonds the two parts together. The non-working part has a higher thermal expansion coefficient than the working part, whereby the non-working part, through the diffused junction, applies a residual compressive stress to the working part for an improved tool strength.
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Maruyama Masao
Minato Yoshihiro
Seki Atsushi
Fasse W. G.
Kane, Jr. D. H.
Lechert Jr.
Sumitomo Electric Industries Ltd.
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