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讨论采用感应加热的方式对30CrMnSiNi2A钢制螺栓试验件进行局部短时回火处理,分别在700、600和550℃温度下对试样进行保温,保温时间为10 s至50 s,研究了温度和保温时间对试样不同区域硬度的影响,并确定了感应加热的最佳工艺。采用最佳工艺处理了30CrMnSiNi2A钢力学性能试样,测试了其偏斜拉伸和低周疲劳性能,并与铅浴回火工艺进行了比较。研究表明感应加热600℃保温10 s的工艺稳定性最佳,三区硬度分别为:回火区域67~68 HRA;过渡区70~72 HRA;非回火区74~75 HRA,可满足典型制件的技术要求,其处理的偏斜拉伸性能和低周疲劳性能与铅浴工艺处理相当。感应工艺可取代传统有毒的铅浴工艺,用于30CrMnSiNi2A钢制螺栓的生产。
The method of inductive heating was applied to short-time temper the 30CrMnSiNi2A steel bolt test pieces. The samples were incubated at 700, 600 and 550 ℃ for 10 s to 50 s respectively. The effects of temperature and The effect of holding time on the hardness of different regions of the sample, and the best induction heating process was determined. The mechanical properties of 30CrMnSiNi2A steel were treated by the best technology. The deflection and low cycle fatigue properties of 30CrMnSiNi2A steel were tested and compared with that of lead-bath tempering. The results show that the process stability of induction heating at 600 ℃ for 10 s is the best. The hardness of the three zones are 67 ~ 68 HRA in the tempering zone, 70 ~ 72 HRA in the transition zone and 74 ~ 75 HRA in the non-tempering zone, respectively. Pieces of technical requirements, the processing of the skew tensile properties and low cycle fatigue performance and lead bath process quite. Induction process can replace the traditional toxic lead bath process for the production of 30CrMnSiNi2A steel bolts.