Method of making steel for springs

Details Method of making steel for springs Method of making steel for springs

C - Chemistry, Metallurgy

22

C

C22C 38/22 (2006.01) C21D 6/02 (2006.01) C21D 8/00 (2006.01) C21D 8/02 (2006.01) C21D 8/12 (2006.01) C21D 9/02 (2006.01) C22C 38/34 (2006.01)

Patent

CA 2044639

Steel material containing by weight from 0.4 % to 0.8 % carbon, from 0.5 % to 2.5 % silicon, from 0.3 % to 2.0 % manganese, from 0.1 % to 1.5 % chromium, and from 0.1 % to 0.5 % molybdenum is hot-rolled to form a plate. The hot-rolled plate 1 is annealed and cold-rolled at a rolling reduction between 10 % and 80 %. The cold-rolled plate is heated at a temperature above Ac3 critical point for a time sufficient to austenitize carbide and annealed.

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