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由于GCr15焊接性能差,使用普通的熔焊方法很难将GCr15与无磁钢这两个异种金属连接起来。利用激光器高加热效率、热输入量精确可控的特点,分别采用Nd:YAG激光器和SlabCO2激光器作为加工热源,通过调整光束入射角和光束偏置距离,实现了GCr15和30Mn23Al4Cr5超低温无磁钢异种材料之间的熔接,解决了轴承钢和无磁钢不能熔焊连接的难题。同时对接头的显微组织进行了研究,并运用电子探针对焊缝中C元素的扩散做了分析。结果表明,焊接接头连接状况良好,没有焊接裂纹等焊接缺陷。
Due to the poor GCr15 solderability, it is difficult to connect GCr15 with a non-magnetic two-dissimilar metal using common welding methods. By using high laser heating efficiency and precise controllable heat input, the Nd: YAG laser and SlabCO2 laser were respectively used as the processing heat source. By adjusting the incident angle of the light beam and the beam offset distance, the ultra-low temperature non-magnetic material of GCr15 and 30Mn23Al4Cr5 Between the welding, solves the problem of bearing steel and non-magnetic steel can not be welded. At the same time, the microstructure of the joint was studied, and the electron probe was used to analyze the diffusion of C element in the weld. The results show that the welded joints are in good condition with no welding defects such as welding cracks.