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基体材料高温强度对枪管寿命的影响研究

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基体材料高温强度对枪管寿命的影响研究
Influence of High-Temperature Strength of Substrate Steel on Barrel Life
投稿时间:2019-03-19
DOI:10.15918/j.tbit1001-0645.2019.088
中文关键词:枪管寿命镀层界面剪切疲劳基体材料高温强度寿命预测
English Keywords:gun barrel lifecoatinginterface shearfatiguesubstrate materialhigh-temperature strengthlife prediction
基金项目:国家部委基金资助项目(30407)
作者单位
耿雪浩南京理工大学 机械工程学院, 江苏, 南京 210094
周克栋南京理工大学 机械工程学院, 江苏, 南京 210094
赫雷南京理工大学 机械工程学院, 江苏, 南京 210094
乔自平中国兵器工业第二〇八研究所, 北京 102202
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中文摘要:
根据界面剪切失效理论和疲劳损伤累积理论,建立了基于枪管镀层—基体界面剪切疲劳损伤累积的枪管寿命预测模型.以某小口径步枪枪管为研究对象,计算了一个冷却周期射击过程中的枪管界面剪切应力,预测了3种不同基体材料枪管的寿命,研究了基体材料高温强度对枪管寿命的影响.研究结果表明,基体材料高温强度是影响枪管寿命的至关重要因素.温度升高引起的界面抗拉强度下降,是导致镀层产生界面破坏以及枪管寿终的重要诱因.增加材料常温强度对提高枪管寿命意义不大,而增加高温强度则可以显著提升枪管寿命.寿命试验结果验证了本文所建寿命预测模型的可用性及预测结果的正确性.
English Summary:
According to the theories of coating shear failure mechanism and fatigue cumulative damage, a life prediction model of gun barrel was proposed based on the shear fatigue damage accumulation at the interface of coating and substrate in barrel. The interface shear stress of a small caliber gun barrel during a cooling cycle was calculated, then the fatigue life was predicted respectively for three barrels with different substrate materials, and the influence of high-temperature strength of substrate steel on barrel life was studied. The research results show that the high-temperature strength of substrate is a key factor which concerns barrel life, and the interface tensile strength decline caused by temperature rise is a significant inducement of coating failure and the end of barrel life. The increase of room-temperature strength of substrate is of little help to barrel life improvement, but the increase of high-temperature strength of substrate can observably enhance barrel life. The comparison of life test results and the prediction results verify the availability of life prediction model and the validity of prediction results.
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相关话题/材料 南京理工大学 机械工程学院 江苏 北京