矿用圆环链临焊缝部位的裂纹分析

Analysis on the Cracks in the Area Next to Weld Seam of Annular Chains for Mining

本文对矿用圆环链临焊缝部位在焊接过程中产生的裂纹进行了分析。结果表明此裂纹主要有两类:即撕裂型裂纹和击穿型裂纹。并对这两种裂纹产生的原因及形成机理进行了综合分析,提出了一些防止措施。

There are two types of cracks in the area next to weld seam of annular chains for mining during welding process, ie, teared type and punctured type cracks. The causes and mechanisms of their emerging are discussed,and some prevention methods are given in this paper.In conclusion,the teared type is due to the high temperature in partial area and extra stress,and the punctured due to the electrical are between workpiece and electrode or electrical conductor.