Accession Number : AD0600791

Title :   A PRELIMINARY EVALUATION OF RAPID HEAT TREATMENT.

Descriptive Note : Technical rept.,

Corporate Author : UNITED STATES STEEL CORP MONROEVILLE PA

Personal Author(s) : Haak,R. P.

Report Date : 01 APR 1964

Pagination or Media Count : 28

Abstract : As part of the HY-180/210 feasibility study, various special processing techniques are being evaluated to establish their potential for improving the toughness of high-yield-strength steels. One processing technique that appears promising in this respect is rapid heat treatment. Therefore, the Applied Research Laboratory initiated a preliminary evaluation of the process by determining the mechanical properties of a 5 1/4 Ni-Cr-Mo-V steel that was heat treated by various combinations of rapid austenitizing, rapid tempering, conventional austenitizing, and conventional tempering. The results showed that the yield strength of the rapidly austenitized specimens was 10 to 20 ksi higher than that of the conventionally austenitized specimens with no loss of notch toughness or ductility. Rapid tempering (4 F per second) after rapid austentizing produced a slightly better combination of strength and toughness at low tempering temperatures than conventional tempering, but conventional tempering produced a slightly better combination of strength and toughness at high tempering temperatures for rapidly austenitized specimens. These preliminary results indicate that rapid heat treatment offers considerable promise for increasing the yield strength of alloy steels by as much as 30 ksi with no loss in ductility or toughness. (Author)

Descriptors :   (*STEEL, HEAT TREATMENT), (*HEAT TREATMENT, STEEL), STRENGTH(PHYSIOLOGY), TOUGHNESS, NICKEL, CHROMIUM, MOLYBDENUM, VANADIUM, WELDING, FEASIBILITY STUDIES, MECHANICAL PROPERTIES

Distribution Statement : APPROVED FOR PUBLIC RELEASE