Fold & Rolling-mill Combined Texture
折叠+轧机复合肌理一次成形
标签：折叠轧制, 复合肌理, 轧机, 一次成形
将折叠坯料不经完全展开直接过轧机（压下量 20–30%），折叠内外面形成两种肌理的分层纹路，再展开即得传统锤击难以一次实现的复合纹理。技巧：折叠角度 60–90° 时纹路对比最强；轧前退火到 500 ℃ 水淬软化。金属丝可夹入折叠层随轧定形，形成嵌入式线条。注意折叠尖端是应力集中点，轧后立即检查微裂并补退火。
Pass a folded billet through the rolling mill (20–30% reduction) without full unfolding, then open it: the inside and outside of the fold take on two distinct layered textures impossible to fake with hammering. A 60–90° fold angle gives maximum contrast; anneal at 500 °C and quench before rolling. Wire can be trapped inside the fold to create embedded lines. The fold tip is a stress raiser—check for micro-cracks and re-anneal right after rolling. ---