RAPID HEAT TREATMENT OF 5NI-CR-MO-V STEEL,
Abstract
Because a previous study showed that the yield strength and toughness of conventionally quenched and tempered steels would be significantly improved by rapid austenitizing, a statistically designed program was initiated to evaluate rapidheat-treatment variables. The effect of prior microstructure (as-rolled and as-quenched), heating rate (2, 10, and 200 F per second), number of austenitizing passes (1 and 5), peak austenitizing temperature (1400, 1550, and 1700 F), holding time at peak temperature (10 to 15 and 50 to 70 seconds), and tempering temperature (untempered, 400, 700, and 1000 F) on the mechanical properties of the 5Ni-Cr-Mo-V experimental HY130/150 steel were determined and compared with those of conventionally heat-treated 5Ni-Cr-Mo-V steel. The statistical analysis of the data predicted that the 5Ni-Cr-Mo-V steel will exhibit a yield strength of 185 ksi, a tensile strength of 204 ksi, an elongation of 17%, a reduction of area of 68 percent, and a Charpy energy absorption at 80 F of 70 ft-lb when as-rolled material is rapidly austenitized 5 times at 200 F per second to a peak temperature of 1400 F, water-quenched, and conventionally tempered at 360 F. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1964
- Accession Number
- AD0456330
Entities
People
- K. H. Kramer
- Lew F. Porter
- R. P. Haak
- R. W. Zabelsky
Organizations
- U.S. Steel