SOVIET PRECIPITATION-HARDENING STEELS
Abstract
Science and Tech. Section, Air Information Div. Washington, D. C. SOVIET PRECIPITATION-HARDENING STEELS. 16 Mar 61, 2p. (Trans. from Effect of Heat Treatment on Transformations Occurring in Type KH17N7YU, Steels. Stal', 1:58-64, TN4.S8, Jan 61). (AID rept. 61-35)Unclassified report DESCRIPTORS: *Heat treatment, *Steel, USSR, *Dispersion hardening, Phase transitions, Martensite, Austenite, Additives, Aluminum, Cooling, Deformation, Processing, Hardening, Tensile properties. The Central Scientific Research Institute of Ferrous Metallurgy studied the effects of Al content and heat treatment on martensitic (Ms) transformation in KH17NYU (Armco 17-7PH) steel. The five heats of steel used in the experiments differed only in Al content and contained 0.0750.090% C; 16.54-16.88% Cr; 7.25-7.35% Ni; and 0, 0.63, 0.94, 1.08, and 1.2% Al. All specimens received the same initial treatment - high-temperature (solution) annealing at 1050 C for 8 hours in vacuum. Specimens were then subjected to intermediate-temperature annealing (austenite conditioning) at 700-1000 C to determine the effect of the conditions of this treatment on Ms temperature and on the amount of martensite formed in continuous cooling. Intermediatetemperature annealing was followed by low-temperature annealing (aging) at 500-600 C. In some cases intermediate annealing was replaced by cold working with 2-40% reduction. Results of the study showed that the effect of intermediate-temperature annealing is determined by annealing temperature and by aluminum content of the steel. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 16, 1961
- Accession Number
- AD0254404
Entities
Organizations
- Library of Congress