论文部分内容阅读
无磁钢为普低钢加锰元素浇铸而成,含锰量14—17％,硬度在HRC45—50,且塑性差,热膨胀系数大,导热性也差。由于无磁钢的塑性差因此抗拉性能比碳钢差,焊接热应力的作用,将导致焊缝在无磁钢一侧出现剥离现象,再者无磁钢导热性差,在焊接热影响区容易出现过热组织,形成脆断,所以说无磁钢可焊性差,而碳钢的可焊性好。
Non-magnetic steel for the general low-grade steel plus manganese casting, manganese content of 14-17%, hardness HRC45-50, and poor plasticity, thermal expansion coefficient, thermal conductivity is poor. Due to the poor plasticity of non-magnetic steel, the tensile performance is worse than that of carbon steel. The effect of welding thermal stress will cause the weld to peel off on the non-magnetic side. Furthermore, the non-magnetic steel has poor thermal conductivity and is easily welded heat affected zone Excessive heat organization, the formation of brittle fracture, so that non-magnetic weldability is poor, and good weldability of carbon steel.