叶四友,刘建永,杨伟.激光熔覆316L不锈钢涂层组织和性能的研究[J].表面技术,2018,47(3):48-53.
YE Si-you,LIU Jian-yong,YANG Wei.Microstructure and Properties of Laser Cladded 316L Stainless Steel Layer[J].Surface Technology,2018,47(3):48-53
激光熔覆316L不锈钢涂层组织和性能的研究
Microstructure and Properties of Laser Cladded 316L Stainless Steel Layer
投稿时间:2017-09-29  修订日期:2018-03-20
DOI:10.16490/j.cnki.issn.1001-3660.2018.03.008
中文关键词:  激光熔覆  316L  CCD中心组合设计  磨损性能  耐蚀性
英文关键词:laser cladding  316L stainless steel  CCD center combination design  wear resistance  corrosion resistance
基金项目:湖北省教育厅科学研究项目(B2015120);光电子技术湖北省协同创新中心专项经费
作者单位
叶四友 湖北汽车工业学院,湖北 十堰 442000 
刘建永 1.湖北汽车工业学院,湖北 十堰 442000;2.西安交通大学,西安 710049 
杨伟 湖北汽车工业学院,湖北 十堰 442000 
AuthorInstitution
YE Si-you Hubei Automotive Industrial Institute, Shiyan 442000, China 
LIU Jian-yong 1.Hubei Automotive Industrial Institute, Shiyan 442000, China; 2.Xi'an Jiaotong University, Xi'an 710049, China 
YANG Wei Hubei Automotive Industrial Institute, Shiyan 442000, China 
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中文摘要:
      目的 提高45#钢的使用性能和耐蚀性。方法 以316L不锈钢粉末为熔覆材料,在45钢退火基体表面制备不锈钢熔覆层,采用CCD中心组合设计,利用金相法检测熔覆层的几何形貌参数,利用光学显微镜(OM)和扫描电镜(SEM)分析熔覆层的显微组织,采用显微硬度计和磨损试验机测试熔覆层的显微硬度和磨损性能,利用电位极化曲线测试熔覆层的耐腐蚀性能。结果 当激光功率为600 W,扫描速度为22.5 mm/s,送粉速率为0.18 r/min时,熔覆层与基体呈良好的冶金结合。熔覆层的硬度在461.3~559.8HV,是基材硬度的2倍左右;磨损量为0.0146 g,是基材的0.1倍;摩擦系数较为稳定,保持在0.5左右,是基材的0.3倍左右;自腐蚀电流密度为3.274×10−7 A/cm2,是基材的0.7倍左右。结论 在45钢表面激光熔覆316L不锈钢涂层后,可有效提高其耐磨性和耐蚀性。
英文摘要:
      The work aims to improve usability and corrosion resistance of 45 steel. With 316L stainless steel powder as cladding material, stainless steel cladding layer was prepared on the surface of annealed 45 steel. CCD center combination design was adopted. Geometrical morphology parameters of the cladding layer was detected in metallographic method. Microstructure of the cladding layer was analyzed with optical microscopy (OM) and scanning electron microscopy (SEM). Microhardness and wear resistance of the cladding layer were measured with microhardness tester and wear tester. Corrosion resistance of the cladding layer was tested based upon polarization curve. The cladding layer exhibited metallurgical bonding to the substrate provided with laser power of 600 W, scanning speed of 22.5 mm/s, powder feeding rate of 0.18 r/min. Hardness of the cladding layer was 461.3~559.8HV, about 2 times that of the substrate; abrasion loss of the cladding layer was 0.0146 g, 0.1 times that of the substrate; friction coefficient was relatively stable and kept at 0.5, about 0.3 times that of the substrate self-corrosion current density was 3.274×10−7 A/cm2, 0.7 times that of the substrate. Laser cladding of 316L stainless steel coatings on annealed 45 steel can effectively improve wear resistance and corrosion resistance of the coatings.
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