1, the large section of the mold, steel hardenability is poor, such as the selection of a large mold of low hardenability steel. 2. In the original microstructure of die steel, the segregation of carbide is serious or the structure is thick...
1, the large section of the mold, steel hardenability is poor, such as the selection of a large mold of low hardenability steel. 2. In the original microstructure of die steel, the segregation of carbide is serious or the structure is thick...