parent metal

• 母材,基材

parent metal的用法和样例：

例句

1. After welding is complete, they shall be removed flush with the base metal without undercutting.
   焊接完成后，应清除这些临时部件至与母材金属表面齐平，不得出现咬边。
2. The results show that certain thickness of the base metal and the regime of heat treatment will increase the peak hydrogen concentration and promote the tendency of disbonding.
   结果显示，一定的母材厚度和焊后热处理条件，使熔合线附近氢浓度峰值提高，从而使氢剥离倾向增大。