为了获取大气环境中30CrMnSiA碳钢材料在不同温度时的吸收率，在积分球绝对测量法的基础上，采用加热激光(波长为1064nm)和探测激光(波长为1319nm)同时作用在材料表面的方法，得到了探测激光入射角度为0°和30°时，30CrMnSiA碳钢从室温到熔点这一温度范围内吸收率变化曲线，变化过程分为4个阶段，变化范围从室温环境的0.4左右到熔化状态的0.9左右。结果表明，温度是影响30CrMnSiA钢材料吸收率的重要因素，激光入射角度对吸收率无影响。

Based on integrating sphere absolute method, temperature-dependent absorptivity of 30CrMnSiA carbon steel was measured with heating laser beam(λ=1064nm) and probing laser beam(λ=1319nm) irradiating on material surface in atmosphere environment at the same time. With the probing laser incident at zero and thirty degrees, the absorptivity of the steel was measured at the temperature range from the room temperature to melting point. It was 0.4 at room temperature and 0.9 at melting point. The results show that temperature has important effect on the absorptivity of 30CrMnSiA carbon steel in atmosphere environment, however the incidence angle hasn’t any effect on absorptivity.