摘要
激光熔覆技术对煤矿机械零部件冲击、摩擦、腐蚀性能等起到重大的作用,激光熔覆后复合材料的力学性能对煤矿井下环境的适应性决定激光熔覆技术的进一步推广,为进一步研究熔覆后的复合材料性能,采用气动水平冲击试验装置模拟煤矿井下冲击环境,以煤矿机械常用材料27SiMn钢基体表面熔覆Fe基合金涂层的复合靶板为研究对象,利用有限元模拟与试验相结合的研究方法,分析了不同冲击压强下靶板的损伤行为和能量吸收特性。结果表明:数值仿真得到的表面损伤面积、弹坑深度、损伤形态和范围与试验结果误差不超过10%,验证了仿真模型的准确性;随着冲击压强的增加,靶板的损伤形式从塑性变形和微裂纹萌生逐步演变为剪切破坏和完全断裂;激光熔覆Fe基合金涂层能够吸收和分散部分冲击能量,有效减缓了基体材料的冲击损伤。为研究煤矿机械设备表面冲击损伤行为提供试验方法和理论分析依据。
Laser cladding technology plays an important role in impact,friction and corrosion performances of coal mine machinery components.Mechanical performances of composite material after laser cladding are crucial for their adaptability to underground environment of coal mines to determine further promotion of laser cladding technology.Here,to further study performances of composite material after cladding,a pneumatic horizontal impact experimental device was used to simulate impact environment in coal mines.A composite target plate coated with Fe-based alloy on surface of commonly used material 27SiMn steel substrate in coal mine machinery was taken as the study object,damage behavior and energy absorption characteristics of the target plate under different impact pressures were analyzed using the combination of finite element simulation and experimental study method.The results showed that surface damage area,crater depth,damage morphology and range obtained with numerical simulation have an error of no more than 10%compared to experimental results to verify the correctness of simulation model;with increase in impact pressure,damage form of target plate gradually evolves from plastic deformation and microcrack initiation to shear failure and complete fracture;laser cladding Fe-based alloy coating can absorb and disperse part of impact energy to effectively reduce impact damage of substrate material;the study results can provide experimental methods and theoretical analysis basis for studying surface impact damage behavior of coal mining machinery equipment.
作者
柴蓉霞
龙雪
肖力
苏成明
姜潇远
CHAI Rongxia;LONG Xue;XIAO Li;SU Chengming;JIANG Xiaoyuan(School of Mechanical Engineering,Xi’an University of Science and Technology,Xi’an 710054,China;School of Mechanical Engineering,Jiangsu University of Technology,Changzhou 213001,China;Xi’an Research Institute of Intelligent Remanufacturing Co.,Ltd.,Xi’an 710016,China)
出处
《振动与冲击》
北大核心
2025年第9期231-240,281,共11页
Journal of Vibration and Shock
基金
陕西省自然科学基金(2020JM-529)
陕西省自然科学基金陕西煤炭联合基金项目(2021JLM-08)。
关键词
煤矿机械
冲击行为
仿真分析
吸能特性
损伤失效
coal mining machinery
impact behavior
simulation analysis
energy absorption characteristics
damage failure
