高速电弧喷涂再制造曲轴质量和效率优化研究  

Study on improving the efficient of remanufacturing crankshaft by the automatic high velocity arc spraying technology

作　　者：田浩亮[1,2] 魏世丞[2] 陈永雄[2] 童辉[2] 徐滨士[2] 

机构地区：[1]北京航空航天大学材料科学与工程学院,北京100037 [2]装甲兵工程学院装备再制造技术国防科技重点实验室,北京100072

出　　处：《材料科学与工艺》2013年第2期1-5,共5页Materials Science and Technology

基　　金：国家重点基础研究发展规划资助项目(973-2011CB013403);国家自然科学基金资助项目(50735006;50971132)

摘　　要：为提高自动化高速电弧喷涂再制造发动机曲轴的效率和涂层的性能,研究了一种新型的自动化高速电弧喷涂再制造发动机曲轴喷涂路径,利用扫描电镜(SEM)、X射线衍射仪(XRD)和材料力学性能试验设备分别测试了涂层的微观组织和结合强度.实验结果表明:涂层组织均匀、致密,为铁素体韧性相与固溶体、金属间化合物的复合组织,采用新喷涂工艺制备涂层性能较好,大大提高了喷涂效率和涂层在曲轴轴颈圆角处的结合强度,降低了再制造成本和喷涂时间,节能、节材及环保效果显著,应用前景广阔.A new spraying path was designed for remanufacturing engine crankshaft based on the automatic high velocity arc spraying for improving the remanufactured efficiencies and the performance of the coatings.The microstructure and adhesive strength of the coating were investigated by SEM,TEM and material mechanical properties tester.The result shows that the dense and homogeneous coating microstructure consists of α-Fe,（Fe,Cr）and intermetallic composition,and a reliable quality of the remanufactured part is obtained.The coating bond strength and spray rates are all increased,and remanufactured cost and time are decreased.Furthermore,this technology has several advantages such as energy and material saving,and environmental protecting.

关 键 词：喷涂路径 轴颈拐角 高速电弧喷涂 结合强度 喷涂效率 

分 类 号：TG174.442[金属学及工艺—金属表面处理]