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淬硬了的弹簧钢经过回火,可以消除由于淬火所引起的应力,并且获得比较稳定的组织,具有最好的综合机械性能。根据规定,圆柱弹簧回火后硬度是R_c40～47。弹簧钢回火后的硬度在这个范围内,具有最好的综合机械性能。以往淬硬了的弹簧钢,65在380±10℃炉中回火,50在420±10℃炉中回火,一般回火时间是20～30分钟。为了缩短回火时间,我们把炉温提高到800±10℃,用很短的时间进行回火,经试验证明,快速回火同一
Hardened spring steel after tempering, you can eliminate the stress caused by quenching, and obtain more stable organization, with the best overall mechanical properties. According to the regulations, after the tempering cylindrical spring hardness R_c40 ~ 47. After tempering spring steel hardness in this range, with the best overall mechanical properties. Previous hardened spring steel, 65 tempered in 380 ± 10 ℃ furnace, 50 tempering furnace 420 ± 10 ℃, the general tempering time is 20 to 30 minutes. In order to shorten the tempering time, we raise the furnace temperature to 800 ± 10 ℃, with a very short time for tempering, the test proved that the same rapid tempering