道次减面率配置对304H不锈钢丝拉拔过程中马氏体相变的影响

设计了两种不同的拉拔工艺(减面率/%:工艺一:34.45,31.67,19.00,20.08;工艺二:20.10,19.28,34.64,31.41),研究了道次减面率配置对304H不锈钢丝拉拔过程中马氏体相变、磁性能及力学性能的影响。结果表明:当钢丝总应变量相同时,大减面率配置在前更有利于马氏体转变,其饱和磁化强度更大,反之则马氏体转变量较少,饱和磁化强度较小。钢丝的强度与拉拔真应变呈线性相关,其大小只与拉拔总应变量相关。本试验中,前两个道次减面率为20.10%和19.28%,后两个道次减面率为34.64%和31.41%时,马氏体转变量较少,钢丝的饱和磁化强度较低。

Effect of Pass Reduction Ratio Configurations on Martensitic Transformation During 304H Stainless Steel Wire Drawing

In this paper,two different drawing processes (reduction of area /% :process No1 ,34. 45,31. 67,19, 00 and 20.08;process No2,20. 10,19. 28,34. 64,31.41) are designed. The effects of pass reduction of area on martensitic transformation, magnetic properties and mechanical properties of 304H stainless steel in wire drawing are studied. The results show that when the total strain of the steel wire is the same, the large reduction ratio at first and second pass is more favorable for martensite transformation, and the saturation magnetization Ms is larger. Otherwise, the martensite transformation is less,and the saturation magnetization is smaller. The strength o£ the steel wire is linearly related to the true strain of the drawing, and the value is related only to the total strain of the drawing. In the test, as the first two pass reduction ratios are 20.10% and 19.28% ,and the latter two pass reduction ratios are 34.64% and 31.41% ,the martensite transformation is less and the saturation magnetization of the steel wire is weak.