noun
base metal; parent metal
Technical term in welding and metalworking: the metal being welded or the main metal in a joint, as opposed to filler metal.
溶接では、母材と溶加材の接合部の強度が重要です。
In welding, the strength of the joint between the base metal and the filler metal is important.
noun
base material; parent material
Used in construction and engineering for the original material before processing, coating, or joining.
この塗料は母材との密着性に優れています。
This paint has excellent adhesion to the base material.