Sintered hard alloy of multiple boride containing iron

Details Sintered hard alloy of multiple boride containing iron Sintered hard alloy of multiple boride containing iron

1975-02-28

1976-12-28

Schafer, Richard E.

Metal working

Means to assemble or disassemble

Puller or pusher means, contained force multiplying operator

75202, C22C 3302, B22F 312

Patent

active

039999521

ABSTRACT:
This invention relates to a sintered alloy of a boride containing iron consisting essentially of a hard phase composed mainly of iron boride or a multiple boride containing iron in which a part of iron boride is substituted by a non-ferrous boride or multiple boride and a metal phase composed of at least one metal selected from Cu, Co, Ni, Fe, Cr, Mo, W, Ti, Zr, Hf, V, Nb, Ta and alloys composed mainly of these metals, wherein the boron content is 3 to 20% by weight, and to a method of making such sintered alloy. The sintered alloy of this invention has a hardness higher than that of high speed steel and has such high hardness and strength that it is comparable to alloys of cemented carbide, and it is characterized in that it has a good corrosion resistance at room temperature, a high oxidation resistance at high temperatures, a high hardness and a high strength, and that it is cheaper and lighter than cemented carbide. This invention provides a novel sintered high-hardness material which will take the place of cemented carbide or high speed steel.

REFERENCES:
steinitz, R. et al. "New Ternary Boride Compounds," in Powder Met. Bull. 6(4): pp. 123-125, 1953.
Haschke, H. et al. "Untersuchungen in Jen Driestopfen: {Mo, W}-{Fe, Co, N,}-B", in Monta. Fur Chemie. 97(5):1459-1468, 1966.
Rieger, W. et al. "Uber einige Kompleboride von Ubergangsmetallen", in Monta. Fur Chemie. 96(3): pp. 844-851, 1965.
Binder, I. et al. "An Evaluation of Molybdenum Boride as Cutting Tools," in Powder Met. Bull. 6(5) pp. 154-162, 1953.
Schwarzkupp, P. et al. Cemented Carbides, MacMillan, N.Y. 1960, pp. 32-51.

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