1. Cause of formation: necessary to release welding stress;
2, crack specifications: a shallow interval of 10-15 mm, there is a dense transverse crack;
3, no crack: not high chromium cast iron alloy, wear resistance can not talk about;
4, small interval: insufficient stress release, resulting in peeling of the surfacing alloy layer;
5, the interval or crack is too large: affecting the wear resistance of the alloy, may cause spalling;
6. Crack inspection standard: The range of large transverse cracks in the range of 100×100 mm: 8-10 channels;
