Heat resisting alloy for exhaust valve and method for producing

Details Heat resisting alloy for exhaust valve and method for producing Heat resisting alloy for exhaust valve and method for producing

1997-10-22

1999-09-14

Ip, Sikyin

Metal treatment

Stock

Ferrous

148442, 420 49, 420582, 420584, 420585, 420586, C22C 3000, C21D 800

Patent

active

059517891

ABSTRACT:
A heat resisting alloy for use in exhaust valves low in price and excellent in the cold workability and possible to be formed into valve shapes through the cold or warm working, which consists by weight percentage of C: 0.01.about.0.1%, Si.ltoreq.2%, Mn.ltoreq.2%, Cr: 12.about.25%, Nb+Ta: 0.2.about.2.0%, Ti.ltoreq.3.5%, Al: 0.5.about.3.0%, Ni: 25.about.45%, Cu: 0.1.about.5.0%, optionally at least one element selected from W.ltoreq.3%, Mo.ltoreq.3%, and V.ltoreq.1% with (1/2W+Mo+V).ltoreq.3%, Co.ltoreq.5% with Ni+Co: 25.about.45%, Ca+Mg: 0.001.about.0.01%, one or both of B.ltoreq.0.01% and Zr: 0.001.about.0.1%, and the balance of Fe and incidental impurities.

REFERENCES:
patent: 4767597 (1988-08-01), Nishimo et al.

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