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我厂的650吨水压机柱塞根据使用情况,需要堆焊一层QA19-2铝锰青铜。由于该水压机柱塞的品种较多(5种13件),而尺寸较小(直径为39～176毫米),堆焊层厚度要求在1～2毫米,所以选用手工电弧堆焊方法比较经济,工艺也较简单。但是到底选用那种手工堆焊方法呢?最初,我们是选用手工电弧堆焊方法进行工艺试验的,但堆焊层的裂纹倾向较严重。后来我们又增补了几项工艺措施,但堆焊层的裂纹仍较严重。根据以前我们在钢基上堆焊紫铜(带极埋弧自动
I 650 tons of hydraulic press plunger according to the situation, the need for surfacing a layer of QA19-2 aluminum manganese bronze. Due to the variety of hydraulic plungers (5 kinds of 13 pieces), and the smaller size (39 ~ 176 mm in diameter), surfacing layer thickness requirements of 1 to 2 mm, so the selection of manual arc surfacing method is more economical, Process is also relatively simple. But in the end use that kind of manual welding method? Initially, we are using manual arc welding method for the process test, but the overlay cracking tendency is more serious. Later, we added several technical measures, but the crack in the overlay layer is still serious. According to the past, we surfacing on the steel base of copper (with submerged arc automatic