结合实例介绍了箱体断裂的大型减速机的修复措施。对可焊性进行了分析；对补焊工艺作了详细说明。
Repair measures of large reducer with housing cracking are introduced by examples. Analysis is carried out on weldability. Detailed description is done on repair welding technology.
吊车轨道的材料由于其含碳量较高， 强度大， 可焊性较差， 焊接时容易产生裂纹， 因此要严格按照工艺执行。
Material for rail of crane is of strong strength because of high carbon content, but of poor weldability, which makes more cracks. Strict technique is required in such welding.
结果表明，该添加剂工艺稳定性好，且镀层可焊性优良、抗变色能力强，可取代高污染的锡铅电镀工艺。
The result proves that the process has advantages of high stabilization, excellent solderability and antitarnishing, which may replace high-pollution tin-lead electroplating technology.
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