金刚石涂层游动芯头制备及其在铜管生产中的应用  

Preparation of diamond coated floating core head and its application in copper pipe production

作　　者：崔玉明 王勇 李国华 姜龙 董旺 CUI Yuming;WANG Yong;LI Guohua;JIANG Long;DONG Wang(Hebei Plasma Diamond Technology Co.,Ltd.,Shijiazhuang 050081,China;Guangdong Longfeng Precision Copper Tube Co.,Ltd.,Zhuhai 519100,Guangdong,China;Hebei Institute of Laser Co.,Ltd.,Shijiazhuang 050081,China;Hebei Key Laboratory of Chemical Vapor Deposition Diamond,Shijiazhuang 050081,China)

机构地区：[1]河北普莱斯曼金刚石科技有限公司,石家庄050081 [2]广东龙丰精密铜管有限公司,广东珠海519100 [3]河北省激光研究所有限公司,石家庄050081 [4]河北省化学气相沉积金刚石重点实验室,石家庄050081

出　　处：《金刚石与磨料磨具工程》2024年第4期456-462,共7页Diamond & Abrasives Engineering

基　　金：河北省科学院科技计划项目资金资助(项目编号:23716)。

摘　　要：通过沉积方式和旋转装置设计,采用直流电弧等离子体喷射法在硬质合金游动芯头表面均匀沉积金刚石涂层,并利用白光干涉仪、扫描电子显微镜、Raman光谱仪和压痕法对涂层的表面粗糙度、形貌、质量均匀性和膜–基附着力等进行测试分析。结果表明:金刚石涂层抛光后的表面平均粗糙度S_(a)为76.4 nm,金刚石涂层脱落位置到压痕中心的平均距离为287.9μm,且各位置的金刚石涂层厚度均匀性和质量均较好。将制备的金刚石涂层游动芯头应用于高精度精密铜管生产线中,与硬质合金游动芯头对比,其在降低劳动强度、保证铜管一致性和延长芯头使用寿命方面都有显著效果。Objectives:In the refrigeration industry,thin-walled copper tubes are crucial heat exchange devices,and during their drawing production process,the floating core head plays a significant role in the quality of the copper tubes.With the rapid development of chemical vapor deposition(CVD)diamond coating technology and its wide application in the field of molds,the DC arc plasma injection method is used to produce diamond-coated floating core heads to im-prove the quality of copper tube drawing and extend the service life of floating core heads.Methods:Using a depos-ition method and a rotating device design,the diamond coating was uniformly deposited on the surface of cemented carbide floating core heads by the DC arc plasma injection method.The surface roughness,morphology,mass uniform-ity,and film-base adhesion of the coating were tested and analyzed using a white light interferometer,scanning electron microscope,Raman spectrometer,and indentation method.The prepared diamond-coated floating core head was ap-plied to a high-precision copper pipe production line,and the application effect was compared with that of a traditional cemented carbide floating core head.Results:SEM and Raman spectrum analysis showed that the diamond coating quality at each position of the floating core head was superior.The average thickness of the diamond in the cylindrical section of the floating core head was 13.3μm,and in the fixed diameter section,it was 13.7μm.At a room temperature of 20℃and a relative humidity of 40%,with a filtering cutoff wavelength of 250μm and a scanning area of 100μm×100μm,the average surface roughness(Ra)of the polished diamond coating was 76.4 nm.Under the indentation test condition of loading to 1000 N and holding constant force for 3 seconds at a fixed loading rate of 20.0 N/s,the average distance from the diamond coating shedding position to the indentation center was 287.9μm.The prepared diamond-coated floating core head was then applied to the high-precision copper pipe production line.Compared

关 键 词：铜管 直流电弧等离子体喷射法 游动芯头 金刚石涂层 

分 类 号：TQ164[化学工程—高温制品工业]