austemp相关论文
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......