以积分球反射率测量装置平台为基础，开展了大气和真空环境下，连续激光辐照30CrMnSiA碳钢材料加热效率实验研究，得到在大气常压、20Pa和0.4Pa真空环境下，30CrMnSiA碳钢材料的温度历史曲线，以及辐照过程中材料表面反射率变化曲线。在大气环境下，激光加热诱导30CrMnSiA碳钢发生剧烈的氧化放热反应，材料的反射率大幅下降，导致材料温升迅速，最后熔穿；而在真空环境下，材料氧化反应缓慢，反射率变化较小，致使材料温升缓慢。结果表明：大气和真空环境下，连续激光对30CrMnSiA碳钢金属材料的加热效率差异明显，大气环境高于真空环境。

Base on integrating sphere reflectance measure assembly, experiments had been done for studying the heating efficiency of laser irradiation 30CrMnSiA carbon steel in atmosphere and vacuum environments. The temperature, reflectance of material were obtained. In atmosphere environment, 30CrMnSiA material occurs severe oxidation reaction, material temperature rapidly rises, reflectance falls, material is finally melted. In vacuum environment, material oxidation reaction and temperature rise is slow，the change of reflectance is also small. The results that the heating efficiency of laser irradiation metal material is better in atmosphere environment.