肖居鹏,杨学锋,李万洋,侯启敏.液压阻尼器活塞杆激光熔覆WC/Co06涂层耐磨耐腐蚀性能[J].表面技术,2023,52(3):217-227.
XIAO Ju-peng,YANG Xue-feng,LI Wan-yang,HOU Qi-min.Wear Resistance and Corrosion Resistance of Laser Cladding WC/Co06 Coating on the Piston Rod of Hydraulic Damper[J].Surface Technology,2023,52(3):217-227
液压阻尼器活塞杆激光熔覆WC/Co06涂层耐磨耐腐蚀性能
Wear Resistance and Corrosion Resistance of Laser Cladding WC/Co06 Coating on the Piston Rod of Hydraulic Damper
  
DOI:10.16490/j.cnki.issn.1001-3660.2023.03.019
中文关键词:  液压阻尼器活塞杆  激光熔覆  WC/Co06涂层  摩擦磨损  盐雾腐蚀
英文关键词:hydraulic damper piston rod  laser cladding  WC/Co06 coating  friction and wear  salt spray corrosion
基金项目:国家自然科学基金(51872122);中国博士后科学基金(2017M620286);山东省重点研发计划(2018CXGC0809);山东省农机装备研发创新计划(2018YF012)
作者单位
肖居鹏 济南大学 机械工程学院,济南 250022 
杨学锋 济南大学 机械工程学院,济南 250022 
李万洋 济南大学 机械工程学院,济南 250022 
侯启敏 济南大学 机械工程学院,济南 250022 
AuthorInstitution
XIAO Ju-peng School of Mechanical Engineering, University of Jinan, Jinan 250022, China 
YANG Xue-feng School of Mechanical Engineering, University of Jinan, Jinan 250022, China 
LI Wan-yang School of Mechanical Engineering, University of Jinan, Jinan 250022, China 
HOU Qi-min School of Mechanical Engineering, University of Jinan, Jinan 250022, China 
摘要点击次数:
全文下载次数:
中文摘要:
      目的 研究WC添加量对WC/Co06复合涂层耐磨耐腐蚀性能影响,以期应用到液压阻尼器活塞杆表面,增强活塞杆耐磨耐腐蚀性能。方法 采用同轴送粉式激光熔覆设备在液压阻尼器活塞杆用42CrMo钢表面制备不同WC含量(质量分数为5%、10%、15%、20%)的WC/Co06涂层,用金相显微镜、扫描电镜、X射线衍射仪及维氏硬度显微计,对4组不同WC含量的涂层进行质量检测。用滑动摩擦磨损试验机对涂层进行磨损性能测试。用盐雾腐蚀试验箱对涂层进行耐腐蚀测试。结果 熔覆层表面质量良好,稀释率为5%左右。熔覆层显微组织随WC含量的升高越来越致密,WC/Co06涂层生成多种硬质相,如Cr23C6、Cr7C3、WC及Fe3W3C等分布在g-Co固溶体周围增强其硬度以及耐磨耐腐蚀能力。4组熔覆层中,20%WC含量的熔覆层硬度最高(810HV),是基体的(275HV)2.95倍。摩擦磨损及盐雾腐蚀试验后,熔覆涂层磨损量及腐蚀失重均明显降低,其中20%WC熔覆层的磨损量及腐蚀失重最低,分别为基体的54.7%和21%。结论 WC可提高熔覆层硬度,改善熔覆层的耐磨耐腐蚀性能,且WC含量越高,强化效果越明显。通过试验可得20%WC含量的WC/Co06涂层具有更优良的耐磨耐腐蚀性能。
英文摘要:
      The wear and corrosion resistance of the piston rod surface of the hydraulic damper can be improved by laser cladding technology. In this paper, WC/Co06 coating was prepared on the surface of 42CrMo steel for hydraulic damper piston rod by coaxial powder feeding laser cladding equipment. The effects of WC content on the wear and corrosion resistance of WC/Co06 coating were researched. Before the experiment, the base material was cut to 50 mm×50 mm×10 mm block by WEDM and polished off the surface pollutants with sandpaper. The two selected powders are spherical powders, and the diameter of Co06 powder is 100-150 μm. WC diameter 10-15 μm. Add 5wt.%WC, 10wt.%WC, 15wt.%WC and 20wt.%WC powder to Co06 powder respectively. The laser cladding experiment adopts LATEC-LAM-400s coaxial powder feeding laser cladding equipment. In the process of laser cladding, the laser power 1 200 W, cladding speed 400 mm/min, powder feeding amount 8 L/min and spot diameter 1mm are selected. After the cladding experiment, the sample is cut with a wire cutting machine, and its surface and section are polished. A scanning electron microscope (EDS-2500) was used to observe the surface morphology of the cladding layer. The cross-section of the cladding layer was corroded with aqua regia corrosion solution. The microstructure of each part of the cladding layer was observed by metallographic microscope, detection of phase composition of the cladding layer by X-ray diffractometer, and the microhardness change of the cladding cross-section was analyzed by a digital display hardness instrument (402MVD). The sliding friction and wear test of the samples was carried out by sliding friction and wear tester (RTECMFT-3000). The wear volume was measured by white light interferometer and the wear morphology was observed. YWX/Q-150 salt spray corrosion test chamber was used to carry out the salt spray test, and the corrosion morphology and products of the samples were compared and analyzed. The results show that the surface quality of the cladding layer is good, and the dilution rate is about 5%. A large number of dense equiaxed crystals are formed at the top of the cross-section of the cladding layer. With the increase of WC content, the white network eutectic structure composed of C, Cr and W in the coating increases significantly, and the grey elliptical dendrite structure becomes finer and finer. WC/Co06 coating generates a variety of hard phases such as Cr23C6, Cr7C3, WC and Fe3W3C, which are distributed around the g-Co solid solution to enhance its hardness, wear resistance and corrosion resistance. Among the four groups of cladding layers, the hardness of the cladding layer with 20wt.% WC content (810HV) is the highest, which is 2.95 times that of the substrate (275HV). After the friction wear and salt spray corrosion tests, the wear amount and corrosion weight loss of the cladding coating decreased significantly, and the wear amount and corrosion weight loss of 20wt.% WC cladding coating were the lowest, 54.7% and 21% of the substrate, respectively. WC can improve the hardness, wear, and corrosion resistance of the cladding layer, and the higher the WC content, the more obvious the strengthening effect. The WC/Co06 coating with 20wt.% WC content has better wear and corrosion resistance.
查看全文  查看/发表评论  下载PDF阅读器
关闭

关于我们 | 联系我们 | 投诉建议 | 隐私保护 | 用户协议

您是第19884998位访问者    渝ICP备15012534号-3

版权所有:《表面技术》编辑部 2014 surface-techj.com, All Rights Reserved

邮编:400039 电话:023-68792193传真:023-68792396 Email: bmjs@surface-techj.com

渝公网安备 50010702501715号