022Cr19Ni10不锈钢与H62黄铜材料焊接工艺试验研究

    Experimental Study on Welding Technology between 022Cr19Ni10 Stainless Steel and H62 Brass Material

    • 摘要: 某试验件采用022Cr19Ni10不锈钢和H62黄铜异种材料焊接而成。在分别采用锡黄铜、硅青铜焊材进行焊接试验时,由于材料的化学成分不同、晶体结构的各向异性,热影响区受Cu2O的影响,导致焊缝出现裂纹和气孔缺陷。采用铝镍青铜焊材进行了022Cr19Ni10不锈钢/H62黄铜对接结构的焊接工艺试验,使022Cr19Ni10不锈钢与H62黄铜之间相互熔合,解决焊缝金属晶体结构受Cu2O影响形成的气孔和裂纹问题;结合脉冲TIG焊接方法,以合适的焊接参数控制焊接过程中的电弧张力,解决异种材料之间无法熔融焊接及Cr23C6造成的晶间腐蚀问题。对焊接试样分别进行射线检测、拉伸、弯曲力学试验、显微组织观察、能谱分析以及晶间腐蚀试验。结果表明:焊缝显微组织晶粒细化,焊接试样的各项力学性能指标优良,试验件具有良好的耐晶间腐蚀性能。

       

      Abstract: A test piece was welded with 022Cr19Ni10 stainless steel/H62 brass dissimilar materials. When tin brass and silicon bronze welding materials were used for welding test, due to different chemical composition and anisotropy of crystal structure, the heat affected zone was affected by Cu2O, and it led to cracks and porosity defects in the weld. The welding process test of 022Cr19Ni10 stainless steel/H62 brass butt structure was carried out by using the aluminum nickel bronze welding material. The mutual fusion between 022Cr19Ni10 stainless steel and H62 brass was realized, and it could solve the porosity and cracks caused by Cu2O in the weld metal crystal structure. Combined with pulsed TIG welding method, the arc tension in the welding process was controlled by using appropriate welding parameters to solve the problem of unfusion welding between dissimilar materials and intergranular corrosion caused by Cr23C6. The welding specimen was tested by using radiographic test, tensile, bending tests, metallographic microstructure observation, energy spectrum analysis and intergranular corrosion test. The results show that the microstructure of the weld is fine, the mechanical properties of the welding specimen are excellent, and the test piece has good intergranular corrosion resistance.

       

    /

    返回文章
    返回