the process of adding a more-easily welded metal to a harder-yo-weld metal is called?

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Answered by GPT-5 mini AI
Buttering — often called weld buttering or a buttering layer.

Definition: depositing a layer of a more-easily welded filler metal onto a harder or hard-to-weld base metal before making the final joint, to improve weldability and reduce cracking/dilution. (Related terms you may also see: weld overlay, cladding or surfacing when the layer is applied for protection.)