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我厂在一防海水腐蚀的大型特种钢部件上堆焊铝青铜时,采用了熔化极氩弧自动堆铜焊新工艺。大家知道,异种金属由于物理化学性质不同,焊接是比较困难的。尤其在淬火倾向大的特种钢上堆焊9～2铝青铜时,很容易产生裂纹、气孔、夹渣等缺陷。何况要在重1吨、直径2米的大工件上进行凹槽堆焊,工艺上就更为复杂,稍有不慎,会造成脱层和渗铜现象,使堆焊层达不到技术要求。用普通气焊、手工氩弧焊,生产率低,耗氩量多,劳动强度大,质量更难以保证,因此采用了熔化极自动氩弧堆焊。我们作了如下几项工作:
I plant in a seawater corrosion of large special steel components of aluminum bronze when welding, the use of a melting pole argon arc automatic welding new technology. We all know that dissimilar metals due to different physical and chemical properties, welding is more difficult. Especially in the tendency of large quenching special steel surfacing 9 ~ 2 aluminum bronze, it is easy to produce cracks, porosity, slag and other defects. Not to mention the weight of 1 ton, 2 meters in diameter large workpiece groove surfacing, the process is more complex, a little careless, will lead to delamination and infiltration of copper, so that the welding layer does not meet the technical requirements . With ordinary gas welding, manual welding, low productivity, argon consumption and more, labor-intensive, more difficult to guarantee the quality, so the use of automatic melting arc welding. We made the following several work: