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对铝含量为2%、4%(质量分数,下同)的310S耐热钢板材采用手工氩弧焊(TIG)的焊接方法进行焊接,利用光学显微镜对焊缝的显微组织进行分析,利用电子探针(EMPA)分析焊接母材的元素分布,并对焊接接头进行室温和高温(800℃)力学性能测试。结果表明:不同铝含量的310S耐热钢板材焊接后的组织均良好,都没有宏观裂纹及夹杂等缺陷;铝元素的加入,抑制了焊接热影响区晶粒的异常长大,细化了晶粒;高铝310S的焊接板材与母材一样具有优良的室温力学性能和高温力学性能,加铝310S耐热钢具有良好的焊接性能。
310S heat-resistant steel plate with 2%, 4% (mass fraction, the same below) of aluminum content was welded by hand welding method (TIG), the microstructure of weld was analyzed by optical microscope, Electron probe (EMPA) analysis of the elemental distribution of welding base metal, and welded joints at room temperature and high temperature (800 ℃) mechanical properties test. The results show that the microstructures of 310S heat-resistant steel plates with different aluminum content are good after welding, and no defects such as macro-cracks and inclusions are present. Addition of aluminum can inhibit the abnormal growth of grains in heat-affected zone and refine the crystal Granules; high aluminum 310S welding plate and base metal have the same excellent mechanical properties at room temperature and high temperature mechanical properties, aluminum 310S heat-resistant steel with good welding performance.