金属热处理 ›› 2021, Vol. 46 ›› Issue (9): 234-240.DOI: 10.13251/j.issn.0254-6051.2021.09.042

• 表面工程 • 上一篇    下一篇

添加CeO2对铝合金表面激光熔覆铝钛熔覆层性能的影响

缪小进1,2,3, 夏思海1,2, 武美萍1,2, 俞经虎1,2, 赵子硕1,2, 崔宸1,2, 张春雷3   

  1. 1.江南大学 江苏省食品先进制造装备技术重点实验室, 江苏 无锡 214122;
    2.江南大学 机械工程学院, 江苏 无锡 214122;
    3.法尔胜泓昇集团有限公司, 江苏 无锡 214433
  • 收稿日期:2021-04-06 出版日期:2021-09-25 发布日期:2021-12-09
  • 通讯作者: 武美萍,教授,博士,博士生导师,E-mail:wumeiping163@163.com
  • 作者简介:缪小进(1990—),男,讲师,博士,主要研究方向为先进制造,E-mail:miaoxiaojin126@126.com。
  • 基金资助:
    江苏省博士后科研计划(276031);江苏省机电产品循环利用技术重点建设实验室开放基金(RRME201902);江南大学基本科研计划(JUSRP121041)

Effect of adding CeO2 on properties of Al-Ti laser clad coating on aluminum alloy

Miao Xiaojin1,2,3, Xia Sihai1,2,Wu Meiping1,2, Yu Jinghu1,2, Zhao Zishuo1,2, Cui Chen1,2, Zhang Chunlei3   

  1. 1. Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment & Technology, Jiangnan University, Wuxi Jiangsu 214122, China;
    2. School of Mechanical Engineering, Jiangnan University, Wuxi Jiangsu 214122, China;
    3. Fasten Group Co., Ltd., Wuxi Jiangsu 214433, China
  • Received:2021-04-06 Online:2021-09-25 Published:2021-12-09

摘要: 利用激光熔覆技术,研究稀土氧化物CeO2的添加对铝钛复合熔覆层性能的影响。首先分析了搭接率对熔覆层微观组织、显微硬度及摩擦磨损性能的影响,然后在40%搭接率的条件下,研究了CeO2的添加量对熔覆层性能的影响。结果显示,当搭接率为40%时熔覆层的各项性能最佳,显微硬度为284.82 HV0.3,相比基体提高了106%;摩擦因数为0.440,相比基体降低了32%;磨损率也降到了0.0105 mm3·N-1·m-1;CeO2的添加使晶粒得到了细化,熔覆层的显微硬度和耐磨性都得了很大程度的提升,当CeO2的添加量为8%时,熔覆层整体性能最佳,显微硬度为305.58 HV0.3,相比未添加CeO2的情况下又提高了7.3%;摩擦因数与未添加前相差不大,但磨损率仅有0.0087 mm3·N-1·m-1,相比未添加CeO2的情况下又降低了17%。

关键词: 激光熔覆, CeO2, 铝合金, 微观组织, 显微硬度, 耐磨性

Abstract: Effect of adding of rare earth oxide CeO2 on properties of Al-Ti coating on aluminum alloy by laser cladding was studied. Firstly, the effects of lap ratio on microstructure, microhardness and wear resistance of the coatings were analyzed. Then, the effects of CeO2 on the properties of the coatings were studied under the condition of 40% lap ratio. The results show that the properties of the coating are the best when the lap ratio is 40%.The microhardness is 284.82 HV0.3, which is 106% higher than that of the substrate; the friction coefficient is 0.440, which is 32% lower than that of the substrate; the wear rate is reduced to 0.0105 mm3·N-1·m-1.The grain size is refined and the microhardness and wear resistance of the coating are greatly improved by adding CeO2. When the content of CeO2 is 8%, the overall properties of the coating is the best. The microhardness is 305.58 HV0.3, which is increased by 7.3% than that without CeO2; the friction coefficient is almost the same as before, but the wear rate is only 0.0087 mm3·N-1·m-1, which is 17% lower than that without CeO2.

Key words: laser cladding, CeO2, aluminum alloy, microstructure, microhardness, wear resistance

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