Method of Hardening Case-Carburized Steels U. S. Steel Corporation

Format:

Conference/Event

Author/Creator:

Grange, R. A., author.

Conference Name:

1973 International Automotive Engineering Congress and Exposition (1973-01-08 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 1973

Summary:

A 4-step heat treatment for hardening case-carburized steels has been developed and is here described and compared with conventional hardening. In step 1 of this new method, steel is case carburized and oil quenched; much higher than normal carburizing temperatures can be used. Step 2 eliminates retained austenite by heating in the bainite region, for example, 700 F for 2 h. Step 3 is a rapid austenitizing treatment followed by an oil quench, and step 4 a temper at 400 F.Three representative grades of low-alloy steels were investigated to determine their response to this new hardening treatment and to explore the variables which influence the product. It is shown that the treatment permits faster carburizing without affecting the quality of the case by carburizing at least as high as 1900 F.The new 4-step hardening method is shown to have the following principal advantages over conventional methods:

Notes:

Vendor supplied data

Publisher Number:

730143

Access Restriction:

Restricted for use by site license