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用等应变应力对比法分析了回火温度对金属橡胶材料(构件)力学性能的影响,用SEM观察微观组织形貌。结果表明:冷拔态不锈钢丝在450℃以下回火消除残余变形应力,并伴有ε碳化物析出,构件强度波动;500℃以上回火发生恢复再结晶,内部微观组织由形变α’马氏体转变为α铁素体,伴有孔洞缩小和溢出,构件强度降低,而450～500℃回火,ε碳化物析出达到平衡,微小裂纹焊合,且未发生恢复再结晶,构件有较高的强度。综合分析,450～500℃是Cr-Ni-Mn不锈钢丝制备金属橡胶材料(构件)较为理想的回火温度。
The effect of tempering temperature on the mechanical properties of metal rubber materials (components) was analyzed by the method of equal strain stress comparison. The microstructure was observed by SEM. The results show that the strain of stainless steel in cold drawn stainless steel is removed by tempering at 450 ℃ to eliminate the residual deformation stress and the ε carbides are precipitated and the strength of components is fluctuated. When the temperature is above 500 ℃, the recrystallization recovers and the microstructure is deformed by α ’ The body transformed into α-ferrite, accompanied by shrinkage and spillover of pores, and the strength of the component decreased. While the temperature was raised from 450 ℃ to 500 ℃, ε carbides precipitated to equilibrium and micro-cracks were welded and no recrystallization occurred. Strength of. Comprehensive analysis, 450 ~ 500 ℃ is Cr-Ni-Mn stainless steel wire made of metal rubber material (component) is the ideal tempering temperature.