The reasons of influencing temper brittlement and control measurements are put forward by analyzing the material of the gun steel tube body though test and research and discuss on the related problems of temper brittlement. The influence mechanism of the chemical elements in steel is analyzed and discussed from practice to theory.%通过对炮钢身管材料的试验分析和对回火脆性相关问题的研究讨论，提出了影响回火脆性的原因及控制措施。针对钢中化学成分元素的影响作用机理从实践到理论进行了分析讨论。
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