Effect of heat treatment variations on 9 Cr-1 MoVNb and 12 Cr-1 MoVW ferritic steels
Description
The effect of variations in the heat treatment of 9 Cr-1 MoVNb and 12 Cr-1 MoVW have been evaluated. Dissolution of carbides during austenitization was found to be somewhat faster in 9 Cr-1 MoVNb than in 12 Cr-1 MoVW. The effect of cooling rate after austenitization was strongly dependent on the austenitization time and temperature. The 9 Cr-1 MoVNb alloy structure was found to be more sensitive to cooling rate than the structure of 12 Cr-1 MoVW. Under some circumstances, furnace cooling of 9 Cr-1 MoVNb after austenitizing resulted in a ferrite plus carbide structure rather than a martensite lath structure, and in addition the carbide was not the same as that formed during tempering. The precipitation reactions in both alloys are essentially complete after tempering 1 h at 6500C. In 12 Cr-1 MoVW the principal carbides are chromium-iron rich M23C6 and vanadium rich MC, whereas those in 9 Cr-1 MoVNb were chromium-iron rich M23C6 and niobium-vanadium rich MC
Additional details
Publishing Information
- Imprint Title
- Alloy development for irradiation performance. Semiannual progress report for period ending September 30, 1981
- Journal Page Range
- p. 263-274.
- Report number
- DOE/ER--0045/7
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 13683371
- Subject category
- S36: MATERIALS SCIENCE; S70: PLASMA PHYSICS AND FUSION TECHNOLOGY;
- Descriptors DEI
- CARBON; CHROMIUM ALLOYS; COOLING; HEAT TREATMENTS; MOLYBDENUM ALLOYS; NIOBIUM ALLOYS; TUNGSTEN ALLOYS; VANADIUM ALLOYS
- Descriptors DEC
- ALLOYS; ELEMENTS; NONMETALS; TRANSITION ELEMENT ALLOYS