摘要
Abstract
Aiming at two penetrating cracks in ZG35B type tube mill end cover, adopting excavating crack, heat welding to deal with combined with added reinforcing rib. During welding process, it is easy to appear cold crack, hot crack and large deformation, so the reasonable welding processes should be used, such as welding parameter, welding sequence, etc. For example, in the first layer, using a small current, the slow welding rate, multi-layer multi-pass welding, tracking and hammering after welding, dehydrogenating timely, and high-temperature tempering after welding should be conducted. Through repair welding, it completely eliminated equipment defects, and received good results.关键词
ZG35B钢/磨煤机/裂纹/焊接Key words
ZG35B steel/ mill/ crack/ welding分类
矿业与冶金
