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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