摘要
采用优化的激光参数,激光熔覆制备出无孔洞、无裂纹缺陷的钛/钢层合板。利用光学显微镜(OM)、电子探针(EPMA)和X射线衍射仪(XRD)等对层合板的熔覆层微观组织和成分分析,并对钛/钢层合板进行显微硬度和拉伸强度等力学性能检测。结果表明,钛熔覆层底部到上部组织从柱状晶转变为胞状晶和等轴晶;熔覆层成分为α-Ti、Ti Fe和少量β-Ti,显微硬度达到560-620HV,为工业纯钛硬度的2-3倍,大大提高了耐磨性能;制备的钛/钢层合板力学性能和延伸性能良好,为钛/钢层合板工程应用提供理论和实验依据。
In order to analyze the microstructure and properties of titanium clad steel plate,a sample without pores and cracks was prepared by laser cladding using optimized laser parameters. It is observed by optical microscope OM,electron probe micro analysis EPMA and X-ray diffraction XRD that the microstructure transfers from dendritic at the bottom of the titanium layer to cell crystal at the top. The micro hardness of the titanium layer,composed by α-Ti、Ti Fe and trace amounts of β-Ti,arranges from 560 HV to 620 HV,which is 2-3 times that of the CP-titanium,then significantly improves the wear property.Titanium clad steel plates have good mechanical behavior and elongation,which provides theoretical and experimental basis for the engineering application
出处
《机械设计与制造》
北大核心
2015年第10期117-119,123,共4页
Machinery Design & Manufacture
基金
国家自然科学基金(51375073)
创新研究群体科学基金资助项目(51321004)
关键词
激光熔覆
钛/钢层合板
显微组织
显微硬度
拉伸性能
Laser Cladding
Titanium Clad Steel Plate
Microstructure
Micro Hardness
Tensile Proper
