第一、鑄鐵焊條的化學成分化學成分(%)名稱/成分CMnSiP≤S≤MoCuReMg灰鐵HT2003.2~3.50.8~1.01.5~1.80.50.12HT3002.9~3.20.9~1.11.2~1.50.150.12球磨鑄鐵QT700-23.7~4.00.5~0.82.3~2.60.10.020.15~0.40.4~0.83.5%~6.5%3.5%~6.5%QT600-33.6~3.80.5~0.72.0~2.40.080.0150.30.8~1.00.06~0.08耐磨耐熱鑄鐵CrNiCuVRTCR161.6~2.4≤1.01.5~2.20.10.0515.0~18.0A類高 鑄鐵3···