激光处理不镀铬枪炮管提高抗烧蚀寿命的研究

用连续ＣＯ２激光束处理了１２．７ｍｍ烧蚀试验枪衬管，经实弹射击考核其抗烧蚀寿命比未经处理的枪管提高４０％以上。借助扫描电镜（ＳＥＭ）对射击后的枪管进行了解剖对比分析；结果表明：激光相变硬化层显著提高了膛面抗热－机械疲劳裂纹的扩展能力，其原因是裂纹前端形成了超载塑性区阻滞了裂纹的扩展。

Study of ablation resistance of non chromium plated firearm tubes treated by laser

The liner tubes of ablation testing firearm were treated by continuous CO 2 laser beams. The shooting tests proved that the ablation resistance life increased by more than 40% compared with the untreated one. SEM results show that the laser hardening layer has better resistance to fatigue crack propagation and the cause is that plastic zone of crack front end around formed as overload has hindered cracks from propagating.