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汽车发动机上使用的气化器(化油器),结构复杂、壁厚相差较大,由熔点较低的锌铝合金铸成。补焊时,往往由于不易排除氧化锌及氧化铝膜而使补焊工作难以进行。我们根据实践经验,采用气焊修补工艺获得了较好的效果,具体工艺如下。焊前准备 1.焊接材料的制备将废气化器熔化后,在带槽的钢模或泥模中浇铸出直径为3～5毫米的合金棒,作为气焊丝。气焊熔剂为气剂401。在预热时,将气焊丝加热后,沾上熔剂,备用。
Vaporizer (carburetor) used in automobile engine has complex structure and big difference in wall thickness, and is made of zinc-aluminum alloy with lower melting point. Repair welding, often due to difficult to rule out the zinc oxide and alumina film make welding work difficult to carry out. We based on practical experience, the use of gas welding repair process obtained better results, the specific process is as follows. Preparation before welding 1. Preparation of welding material After the waste gasifier is melted, a 3 to 5 mm diameter alloy rod is cast in a grooved steel mold or mud mold as a gas welding wire. Gas welding flux gas agent 401. When preheating, gas wire heating, stained with flux, spare.