Infrared Pyrometry Closed-loop Recipe
红外测温与炉温闭环控制配方
标签：红外测温, 闭环, 炉温, 发射率
铜表面光亮反射强，红外测铜需设定发射率 0.15–0.35 并优先选用双色（比色）红外仪消除发射率漂移。闭环做法：炉内均匀布置 3 个热电偶做基准，红外仪在线扫描坯料表面，偏差 >15 ℃ 时自动调节炉功率。锻打窗口可从 ±40 ℃ 收窄到 ±12 ℃，铜合金过热晶粒粗化报废率从 3% 降到 0.5% 以下。日常用便携黑体炉校准一次/周。
Bright copper reflects strongly, so set emissivity 0.15–0.35 and prefer two-color (ratio) pyrometers to cancel emissivity drift. Closed loop: 3 thermocouples calibrate the furnace, an IR scanner reads billet surfaces, and power trims automatically at >15 °C deviation. The forging window tightens from ±40 °C to ±12 °C, cutting overheat-grain scrap from 3% to under 0.5%. Calibrate weekly with a portable blackbody source. ---