Troubleshooting: HAZ in Laser & Induction Coloring
故障排查：激光与感应着色的热影响区
标签：热影响区, 过烧, 激光, 感应, 色差, 故障排查
激光/感应局部着色三类常见问题：①色带边缘发黑晕圈——能量过高或停驻过长，功率降 20% 或加快扫描 30% 试之；②同批颜色不一致——铜材批次导热率差异（退火态与冷轧态相差约 10%），着色前统一热处理状态；③黄铜脱锌发红——表面温度超 450 °C 时锌挥发，感应着色黄铜须控制在 400 °C 以下并用红外测温仪监控。所有缺陷处可 800 目打磨后重新着色。
Three common laser/induction coloring problems: (1) black halos at color-band edges — too much energy or dwell; cut power 20% or scan 30% faster. (2) Batch-to-batch color shifts — thermal conductivity differs ~10% between annealed and cold-rolled copper; normalize heat condition before coloring. (3) Dezincification reddening on brass — zinc volatilizes above 450 °C, so keep brass under 400 °C with pyrometer monitoring. Any defect spot can be re-sanded at 800 grit and recolored. ---