Mechanical properties and wear behavior of extruded basalt fibers/7075 aluminum matrix composites used for drill pipes  

钻杆用玄武岩纤维/7075铝基复合材料的力学性能和磨损行为

作　　者：MA Yin-long SUN Zhi-gang XIONG Hong-wei REN Jie ZHAO Jing-jing GUO Cheng-bin 马银龙;孙志刚;熊洪威;任杰;赵菁菁;郭承斌(College of Construction Engineering,Jilin University,Changchun 130026,China;Key Laboratory of Drilling and Exploitation Technology in Complex Conditions of Ministry of Natural Resources,Jilin University,Changchun 130026,China)

机构地区：[1]College of Construction Engineering,Jilin University,Changchun 130026,China [2]Key Laboratory of Drilling and Exploitation Technology in Complex Conditions of Ministry of Natural Resources,Jilin University,Changchun 130026,China

出　　处：《Journal of Central South University》2025年第1期21-33,共13页中南大学学报(英文版)

基　　金：Project(2021YFC2900200)supported by the National Key Research and Development Project of China;Project(20230203114SF)supported by the Key Research and Development Project of Jilin Province,China。

摘　　要：Basalt fibers/7075 aluminum matrix composites were studied to meet the demand of aluminum alloy drill pipes for material wear resistance.The composites with different basalt fiber additions were prepared by hot pressed sintering and hot extrusion.The mechanical properties as well as friction and wear properties of the composites were studied by microstructure analysis,tensile experiments,friction and wear experiments.The results showed that basalt fibers were oriented and uniformly distributed and led to local grain refinement in the alloy matrix.The hardness and elongation of the composites were improved.The friction coefficient of the composites increased and then decreased,and the maximum wear depth and wear amount decreased,then increased,then decreased again with the growth of basalt fiber addition.Meanwhile,the inclusion of basalt fibers mitigated the uneven wear of the extruded 7075 aluminum alloy.The value of wear depth difference of 7075-0.2BF was the smallest,and that of 7075-2.0BF was close to it.The maximum wear depth and wear volume the 7075-0.2BF and 7075-2.0BF were also the smallest.The inhibition of uneven wear by basalt fibers enhanced of wear resistance for 7075 aluminum alloy,which has reference significance for improving the performance of aluminum alloy drill pipes.为满足地质钻探用铝合金钻杆对材料耐磨性的要求,通过粉末冶金和热挤压制备了不同玄武岩纤维添加量的7075铝基复合材料。通过微观组织分析、拉伸实验和摩擦磨损实验等,研究了铝基复合材料的力学性能和摩擦磨损性能。结果表明:玄武岩纤维在复合材料基体中沿挤压方向均匀分布,并造成局部晶粒细化,复合材料的硬度和伸长率得到提升。随着玄武岩纤维添加量的增加,复合材料的摩擦系数先增大后减小,最大磨损深度和磨损量先减小后增大再减小,7075-0.2BF和7075-2.0BF的最大磨损深度和磨损体积最小。同时,玄武岩纤维的加入缓解了热挤压7075铝合金的不均匀磨损,7075-0.2BF不同方向上的磨损深度差值最小,7075-2.0BF与其接近。磨损实验结果表明,玄武岩纤维的加入能够提高7075铝合金的耐磨性,并对不均匀磨损起到抑制作用,本研究能为钻杆用铝合金材料的强化设计提供参考。

关 键 词：aluminum matrix composites basalt fibers mechanical properties wear behavior 

分 类 号：TG1[金属学及工艺—金属学]