VACUUM HEAT TREATING OF HIGH-STRENGTH STEEL CASTINGS.
ARMY MATERIALS RESEARCH AGENCY WATERTOWN MASS
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An investigation was conducted to verify the feasibility of employing vacuum heat treating as a means of improving the mechanical properties of high-strength steel castings. Eight octabar AISA 4340 and 4340 1.30 percent silicon steel castings, four vacuum induction melted and four air induction melted, were subjected to various combinations of vacuum and conventional heat treating. The results indicated no significant tangible evidence of any increase in mechanical properties when vacuum heat treated. Author
- Fabrication Metallurgy