High corrosion resisting alloy for diesel engine valve

Details High corrosion resisting alloy for diesel engine valve High corrosion resisting alloy for diesel engine valve

1998-02-03

2000-03-21

Yee, Deborah

Alloys or metallic compositions

Nickel base

Chromium containing

420449, 148428, C22C 1905

Patent

active

060399198

ABSTRACT:
A high corrosion resisting alloy for use in inlet and exhaust valves of diesel engines which is low in cost and excellent in corrosion resistance and strength, which consists by weight percentage of C.ltoreq.0.1%, Si.ltoreq.1.0%, Mn.ltoreq.1.0%, 25%<Cr.ltoreq.32%, 2.0%<Ti.ltoreq.3.0%, 1.0%.ltoreq.Al.ltoreq.2.0% and the balance being Ni and incidental impurities. The valves for the diesel engines are manufactured through the steps of forging the above-mentioned alloy into near net shapes of the valves, performing aging treatment (after solid solution treatment according to demand), and further enhancing hardness of the valves at their valve faces locally through partial cold forging.

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