Super hard high-speed tool steel

Details Super hard high-speed tool steel Super hard high-speed tool steel

1987-12-21

1989-11-14

Lechert, Jr., Stephen J.

Specialized metallurgical processes, compositions for use therei

Compositions

Consolidated metal powder compositions

75236, 75237, 75239, 75241, 75243, 75244, 75246, 419 38, 419 29, 420 10, 420 11, 420 12, 420 15, 420 27, C22C 2904

Patent

active

048804614

ABSTRACT:
A super hard high-speed tool steel having a composition satisfying the condition of 0.ltoreq.C-Ceq.ltoreq.0.6 (where Ceq=0.06Cr+0.033 W+0.063 Mo+0.2 V within the range of 1.7.ltoreq.C.ltoreq.4.1%, the composition containing 3 to 10% of Cr, 1 to 20% of W, 1 to 15% of Mo (where 18.ltoreq.W+2Mo.ltoreq.40), 1 to 15% of V, not greater than 15% of Co, not greater than 2% of Si, not greater than 1% of Mn, and the balance substantially Fe and inevitable impurities, the steel further containing in uniformly dispersed state 2 to 12% in total of one, two or more selected from a group consisting of nitrides, carbides and carbonitrides of Ti, V, Zr, Nb, Hf and Ta in the composition. This tool steel exhibits a distinguished hardness of HRC 71 or higher, as well as toughness.

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patent: 4469514 (1984-09-01), Hultz, Jr.
patent: 4519839 (1985-05-01), Toyoaki et al.
patent: 4599109 (1986-07-01), Kawai et al.

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