The Heat Treatment of Vanadium-Modified Alloy Steels
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The hardenabilities of four alloy steel grades modified with vanadium were determined at various austenitizing temperatures depending on carbon content. The modification was made by substituting V for Mo; results show that a 1:2 substitution of V for Mo (in weight percent) was effective. The “micro-alloying” addition of 0.10–0.15%V, alone or in combination with a lesser amount of Mo, is sufficient to attain the hardenabilities of the standard grade containing 0.15–0.40%C with higher amounts of Mo. From the results, it was deduced that vanadium carbide can be dissolved in austenite at standard or slightly higher austenitizing temperatures for all the vanadium levels studied. It was also shown that grain coarsening of the austenite is induced more by vanadium than by molybdenum.
KeywordsAustenite Vanadium Alloy Steel Hardenability Data Standard Grade
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- 1.G.H. Robinson, “The Future of Alloy Steels in the Automobile,” Preprint Paper 1, Alloys For the Eighties, ed. by R.Q. Barr, Proceedings of a Symposium, Ann Arbor, Michigan, June 17–18, 1980, p. 1.Google Scholar
- 2.D.V. Doane, “A Critical Review of Hardenability Predictors,” Hardenability Concepts with Applications to Steel, ed by D.V. Doane and J.S. Kirkaldy, TMS-AIME, Warrendale, Pennsylvania, 1978, p. 351.Google Scholar
- 3.G.H. Walter, Private Communication, Science and Technology Center, International Harvester.Google Scholar
- 4.C.A. Siebert, D.V. Doane, and D.H. Breen, The Hardenability of Steels, American Society for Metals, Metals Park, Ohio, 1977.Google Scholar
- 5.P.L. Mangonon, “Hardenabilities of Vanadium-Modified 4330 Low Alloy Constructional Steels,” J. Heat Treating 1 (4), in press.Google Scholar
- 7.SAE Iron and Steel Handbook Supplement HS30, 1980.Google Scholar
- 8.P.L. Mangonon, “Relative Hardenabilities and Interaction Effects of Mo and V in 4330 Alloy Steel,” Paper submitted for publication in Met. Trans. A. Google Scholar
- 9.H.A. Wriedt and H. Hu, “Solubility Product of Vanadium Carbide in Austenite,” Paper presented at the Carl Wagner Memorial Symposium, 110th Annual AIME Meeting, Chicago, Illinois, February 22–26, 1981.Google Scholar
- 10.J.H. Woodhead, “Physical Metallurgy of Vanadium Steels,” Vanadium in High Strength Steel, Proceedings of VANITEC Seminar, Chicago, November, 1979, p. 3.Google Scholar
- 11.S. Koyama, T. Ishii, and K. Narita, “Effects of Mn, Si, Cr, and Ni on the Solution and Precipitation of Niobium Carbide in Iron Austenite,” Nippon Kink. Gakk. 35 (1971) p. 1089.Google Scholar
- 12.R.B. Bertolo, R.T. Ault, and R.H. Cobbett, “A New High Performance, Cost Effective, Carburizing Grade Alloy Steel,” SAE Paper 810424, Presented at the SAE Congress, Detroit, Michigan, February 23–27, 1981.Google Scholar