1. In the whole process of mold manufacturing and production manufacturing

There are problems in the quality of wool embryo forged products. Some abrasives have hundreds of cracks after manufacturing, and the cracks grow rapidly, which can only ensure the appearance specifications after forging. The stainless steel plate has defects such as milk bubble crystallization, mixed cementite, loose shrinkage, bubble widening and stretching during production and processing, which are very harmful to the deformation and cracking of the production line. Subsequently, the z-end heat treatment embrittlement and failure trend.

2. The stress generated in the final production process such as turning, milling and planing can be eliminated through intermediate quenching.

3. The ground stress caused by the cutting of hardened steel, the friction heat generated by the cutting, the softening layer and the carburizing layer reduce the thermal fatigue limit, and are easy to cause hot cracks and initial cracks. The h13 steel can be heated to 510-570 ℃, and after polishing, the ground stress can be eliminated by quenching every 25mm thick insulation layer.

4. When the ground stress is high during electric spark cutting, there is a layer of white and clean electrical components on the abrasive surface, and the electrical components are hard and brittle, so the layer itself will produce cracks and ground stress. During electric spark cutting, high-frequency mesh layer shall be selected to be at least white, and shall be polished with quenching liquid,