What is the most often used heat treatment method ? gas nitriding or acuum nitriding ? post tampering needed ? how many times 冲裁模材料常用的热处理为何?渗氮法?真空渗氮法?之后须回火吗?几次?
2.
What is the most often used heat treatment method ? gas nitriding or vacuum nitriding ? post tampering needed ? how many times 冲裁模材料常用的热处理为何?渗氮法?真空渗氮法?之后须回火吗?几次?