摘要
为了进一步研究激光熔覆Ni-Al/Al_(2)O_(3)-13%TiO_(2)金属陶瓷涂层的硬度及耐磨性,应用YLS-2000光纤激光器在45钢基体上分别制备Ni-Al涂层及Ni-Al/Al_(2)O_(3)-13%TiO_(2)金属陶瓷涂层。通过金相显微镜、扫描电子显微镜、X射线能谱分析、X射线衍射等系统地研究涂层的组织形貌、物相组成及元素分布。采用HXD-1000TB维氏硬度仪测定涂层截面显微硬度分布,利用M-2000磨损试验机进行磨损试验。结果表明,Ni-Al/Al_(2)O_(3)-13%TiO_(2)金属陶瓷涂层的宏观成形质量较好,无裂纹,其涂层的截面最高硬度约为Ni-Al涂层的2倍,约为基体的4倍;其磨损体积约是45钢基体的1/8,相较于Ni-Al涂层的磨损体积降低了30%。Ni-Al/Al_(2)O_(3)-13%TiO_(2)金属陶瓷涂层组织更加均匀致密,其硬度及耐磨性能相较于Ni-Al涂层及基体材料显著提升,该研究对于金属陶瓷材料的整体性能分析具有一定的参考意义。
In order to further study the hardness and wear resistance of laser cladding Ni-Al/Al_(2)O_(3)-13%TiO_(2) cermet coating,a YLS-2000 fiber laser was used to prepare Ni-Al coating and Ni-Al/Al_(2)O_(3)-13%TiO_(2) cermet coating on a 45 steel substrate.The metallographic microscope,scanning electron microscope,electronic differential system energy spectrum analysis,X-ray diffraction and other systems were used to study the microstructure,phase composition,and element distribution of the coating.HXD-1000TB Vickers hardness tester was used to measure the micro-hardness distribution of the coating section,and the wear test was performed by using the M-2000 abrasion tester.The Ni-Al/Al_(2)O_(3)-13%TiO_(2) cermet coating has good macro-forming quality and no cracks.The maximum cross-section hardness of the coating is about twice that of the Ni-Al coating and about four times that of the substrate.Its wear volume is about 1/8 of that of the 45 steel substrate,which is 30%lower than that of Ni-Al coating.The structure of Ni-Al/Al_(2)O_(3)-13%TiO_(2) cermet coating is more uniform and dense,and its hardness and wear resistance are significantly improved compared to Ni-Al coating and matrix material.This research has certain reference significance for the overall performance analysis of cermet materials.
作者
赵海洋
李新梅
卢彩彬
Haiyang Zhao;Xinmei Li;Caibin Lu(School of Mechanical Engineering,Xinjiang University,Urumqi,Xinjiang 830047,China)
出处
《激光与光电子学进展》
CSCD
北大核心
2020年第21期218-226,共9页
Laser & Optoelectronics Progress
基金
国家自然科学基金(51865055)
天山英才第二期项目(201720025)。
