为稳定生产抗拉强度大于1400MPa，屈服强度大于l100MPa的ADI铸件，首先应选择优质炉料、球化剂和孕育剂，并采取多次孕育等措施，从而可得......

Steels are used widely for production of machine components due to their versatility, low cost, ease of production and m......