铸铝零件的补焊、主要是破碎零件的焊接,按一般方法是难以完成的,我们采用石棉制模补焊法效果很好,现将施焊过程介绍如下: 焊前准备:①先在裂纹端部钻φ6毫米的止裂孔;②用手铲、锉刀等工具将断裂处加工成如图1所示的坡口,坡口深度为零件厚度的1/2、1/3;③对零件进行脱脂处理,一般可用火焰把油脂烧掉,也可用四氯化碳、二氯乙烷、丙酮等有机溶剂清洗;④需焊接部位要彻底清理氧化物,清除宽度在坡口两侧各30毫米左右,最好用15～20％NaOH水溶液刷洗或浸泡,直到露出金属光泽,然后用水洗净,如断裂时间不长,也可用刮刀清理,处理后的零件应立即施焊,一般停留时间不应超过两小时;⑤制模,把石棉绒用水浸 Casting aluminum parts welding, mainly broken parts of the welding, according to the general method is difficult to complete, we use asbestos welding method is very good, now the welding process is as follows: Welding preparation: ① first in the cracks End drilling φ6 mm crack hole; ② hand shovel, file and other tools will be broken into the groove shown in Figure 1, the groove depth of the thickness of the parts 1/2, 1/3; ③ parts Degreasing, the general flame can be used to burn fat, but also with carbon tetrachloride, dichloroethane, acetone and other organic solvents cleaning; ④ need to be completely soldered to clean oxide, remove the width of about 30 mm on both sides of the groove , Preferably with 15 ~ 20% NaOH solution scrub or soak until the metal luster exposed, and then washed with water, such as the fracture time is not long, can also be scraped clean, treated parts should be immediately welded, the general residence time should not exceed Two hours; ⑤ modeling, flooding with asbestos