某壳体断裂原因分析
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摘要
目的分析某产品壳体在靶场试验中出现断裂疵病的原因,并提出预防和改进措施。方法通过对断口进行宏微观观察、金相组织检查和化学成分分析检测、力学性能试验、验证试验及强度计算等,初步确定了壳体断裂性质和原因。结果对改进结构的壳体进行了结构强度的验证试验,经对射击试验后回收的壳体进行拆分检测,原发生断裂现象的位置无破坏、裂纹现象,变形量满足产品图定要求,改进结构的壳体结构强度满足要求。结论通过验证试验再次确定了断裂原因:壳体密封圈槽处壁厚差超差;壳体材质C元素含量偏高,材料的脆性较大;断口处材料偏析严重;结构设计强度裕度不足。根据壳体断裂原因,提出了相应的预防措施。
The paper aims to analyze the causes of the fracture defects of a product shell in the range test, and put forward preventive and improvement measures. The fracture properties and reasons of the shell were preliminarily determined by fracture macro, microscopic observation, metallographic examination and chemical composition analysis, mechanical properties test, verification test and strength calculation. Structural strength test was carried out on the shell of the improved structure. After the shell was split and tested after the firing test, the original fracture phenomenon was not destroyed and no crack was found. The deformation amount met the requirement of the product map, and the strength of the improved structure also met the corresponding requirement. Through the test, the reason of the fracture is confirmed again: the wall thickness difference of the shell sealing ring is too bad; the C element content of the shell material is high;the brittleness of the material is large; the material segregation at the fracture surface is serious and the intensity of the structure design is insufficient. According to the cause of shell fracture, corresponding preventive measures are put forward.
The paper aims to analyze the causes of the fracture defects of a product shell in the range test, and put forward preventive and improvement measures. The fracture properties and reasons of the shell were preliminarily determined by fracture macro, microscopic observation, metallographic examination and chemical composition analysis, mechanical properties test, verification test and strength calculation. Structural strength test was carried out on the shell of the improved structure. After the shell was split and tested after the firing test, the original fracture phenomenon was not destroyed and no crack was found. The deformation amount met the requirement of the product map, and the strength of the improved structure also met the corresponding requirement. Through the test, the reason of the fracture is confirmed again: the wall thickness difference of the shell sealing ring is too bad; the C element content of the shell material is high;the brittleness of the material is large; the material segregation at the fracture surface is serious and the intensity of the structure design is insufficient. According to the cause of shell fracture, corresponding preventive measures are put forward.
引文
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[13]周绪绪,雷欢平,刘宝峰,等.某型号发动机壳体外部零件钎焊断裂分析[J].航天制造技术,2017,60(3):38-41.ZHOU Xu-xu,LEI Huan-ping,LIU Bao-feng,et al.T2Analysis of Brazing Fracture of External Parts of ACertain Type of Engine[J].Aerospace Manufacturing Technology,2017,60(3):38-41.
[14]陈志闯,李伟兵,朱建军,等.40CrMnSiB钢圆柱壳体膨胀断裂中间状态回收试验研究[J].兵工学报,2018,39(11):2137-2144.CHEN Zhi-chuang,LI Wei-bing,ZHU Jian-jun,et al.Recovery Experiment Study of Cylindrical 40CrMnSiBSteel Shell in Intermediate Phase of Expanding Fracture Proces[J].Acta Armamentarii,2018,39(11):2137-2144.
[15]赵金兰,李京川,瞿婷婷,等.某S135钻杆管体断裂失效原因分析[J].焊管,2018,41(11):48-54.ZHAO Jin-lan,LI Jing-chuan,QU Ting-ting,et al.Fracture Failure Analysis of a S135 Drill Pipe Body[J].Welded Pipe and Tube,2018,41(11):48-54.
[2]钟奇鸣,李翔.减震胶套壳体的断裂原因分析[J].理化检验(物理分册),2016(11):825-827.ZHONG Qi-ming,LI Xiang.T2 Analysis on Fracture Reasons of Shells of Damping Rubber Sleeves[J].Physical Testing and Chemical Analysis Part B:Chemical Analysis,2016(11):825-827.
[3]荣润烈.材料成形加工技术的发展趋势[J].精密成形工程,2009,1(2):6-11.RONG Run-lie.Introduction to Developing Trend of Material Forming Technology[J].Journal of Netshape Forming Engineering,2009,1(2):6-11.
[4]张志明,黄少东,庞丹,等.弹体热冲拔成形工艺数据库研究与开发[J].精密成形工程,2013,5(6):36-41.ZHANG Zhi-ming,HUANG Shao-dong,PANG Dan,et al.Research and Development of Shell Body Hot Extrusion-draw Forming Database[J].Journal of Netshape Forming Engineering,2013,5(6):36-41.
[5]姜超,单忠德,庄百亮,等.热冲压成形22MnB5钢板的组织和性能[J].材料热处理学报,2012,33(3):78-81.JIANG Chao,SHAN Zhong-de,ZHUANG Bai-liang,et al.Microstructure and Properties of Hot Stamping22MnB5 Steel[J].Transactions of Materials and Heat Treatment,2012,33(3):78-81.
[6]柴艳军,李如江,岳继伟,等.壳体壁厚线性变化对聚能射流形成的影响[J].科技通报,2017(9):12-14.CHAI Yan-jun,LI Ru-jiang,YUE Ji-wei,et al.The Effect of Varying Linearly Wall Thickness Cases on the Formation of Shaped Charge Jet[J].Bulletin of Science and Technology,2017(9):12-14.
[7]孙欢庆.基于多电技术的民用飞机舱门电作动器研究[J].航空科学技术,2014(11):14-18.SUN Huan-qing.The Electrical Motor Actuation System Research of Doors in Civil Aircraft[J].Aeronautical Science and Technology,2014(11):14-18.
[8]赵方宣,李如江,薛伟,等.非对称壳体对聚能射流形成影响的数值模拟和试验[J].科学技术与工程,2016(10):1-5.ZHAO Fang-xuan,LI Ru-jiang,XUE Wei,et al.Numerical Simulation and Test of the Influence of Asymmetric Shell to Shaped Charge Jet Formation[J].Science Technology and Engineering,2016(10):1-5.
[9]张高峰,李向东,周兰伟,等.对称刻槽预控破片战斗部壳体爆炸过程质量损失率研究[J].兵工学报,2018,39(2):254-260.ZHANG Gao-feng,LI Xiang-dong,ZHOU Lan-wei,et al.Research on the Explosion Mass Loss Rate of Pre-formed Fragment Warhead Shell with Symmetric Groove[J].Acta Armamentarii,2018,39(2):254-260.
[10]孙长海,郭超,郝相民,等.炼油厂催化裂化装置第二再生器旋风分离器断裂分析[J].金属热处理,2011(S1):215-218.SUN Chang-hai,GUO Chao,HAO Xiang-min,et al.Breakage Analysis of Cyclone Separator in Catalytic Cracking Unit of Refinery Units[J].Heal Treatment of Metals,2011(S1):215-218.
[11]方蕾.CFM56-7发动机起动机壳体螺杆断裂分析[J].航空维修与工程,2018(11):36-38.FANG Lei.Analysis on Housing Bolt Fracture of B737NG Engine Starter[J].Aviation Maintenance&Engineering,2018(11):36-38.
[12]翟雨生.采煤机摇臂壳体断裂原因分析及改进措施[J].煤矿机械,2014,35(10):192-193.ZHAI Yu-sheng.Fracture Analysis and Improvement Measures of Ranging Shell for Shearer[J].Coal Mine Machinery,2014,35(10):192-193.
[13]周绪绪,雷欢平,刘宝峰,等.某型号发动机壳体外部零件钎焊断裂分析[J].航天制造技术,2017,60(3):38-41.ZHOU Xu-xu,LEI Huan-ping,LIU Bao-feng,et al.T2Analysis of Brazing Fracture of External Parts of ACertain Type of Engine[J].Aerospace Manufacturing Technology,2017,60(3):38-41.
[14]陈志闯,李伟兵,朱建军,等.40CrMnSiB钢圆柱壳体膨胀断裂中间状态回收试验研究[J].兵工学报,2018,39(11):2137-2144.CHEN Zhi-chuang,LI Wei-bing,ZHU Jian-jun,et al.Recovery Experiment Study of Cylindrical 40CrMnSiBSteel Shell in Intermediate Phase of Expanding Fracture Proces[J].Acta Armamentarii,2018,39(11):2137-2144.
[15]赵金兰,李京川,瞿婷婷,等.某S135钻杆管体断裂失效原因分析[J].焊管,2018,41(11):48-54.ZHAO Jin-lan,LI Jing-chuan,QU Ting-ting,et al.Fracture Failure Analysis of a S135 Drill Pipe Body[J].Welded Pipe and Tube,2018,41(11):48-54.