摘要
采用激光合金化技术在Ti6Al4V合金基体表面制备了厚度约为120μm均匀致密连续的Ti-Cu合金层,分析了合金层的元素分布和显微组织结构。结果表明,Ti-Cu合金层中Cu元素随着合金层深度呈梯度分布,在靠近Ti-Cu合金层表面的区域主要是柱状晶夹杂着少量的块状晶,中上部区域主要是生长取向各异且较粗的不发达枝状晶和部分胞状晶,中下部区域主要是生长取向各异的胞状晶,合金层与基材的界面处主要以细小的平面晶为主。合金化层中Cu元素和Ti元素除了形成固溶体外,还形成了Ti_(2)Cu、Ti_(3)Cu和Cu_(3)Al_(4)等金属间化合物,同时还形成了Cu_(3)TiO_(4)和Al_(2)TiO_(5)等金属陶瓷相。
A continuous and compact Ti-Cu alloying layer with thickness of about 120μm was prepared on Ti6Al4V alloy surface by laser alloying.The element distribution and microstructure of the Ti-Cu alloying layer were analyzed.The results show that the distribution of Cu element in the Ti-Cu alloying layer is gradient with the depth.Microstructure near the surface of the Ti-Cu alloying layer is mainly composed of columnar crystals with a small amount of block crystals,the upper middle region is mainly composed of undeveloped dendritic crystals and some cellular crystals with different growth orientations,the lower middle region is mainly cellular crystals with different growth orientations,and the interface between the layer and the substrate is mainly composed of fine planar crystals.The Cu and Ti elements in the Ti-Cu alloying layer not only form solid solutions,but also form intermetallic compounds Ti_(2)Cu,Ti_(3)Cu,Cu_(3)Al_(4),and metal-ceramic Cu_(3)TiO_(4),Al_(2)TiO_(5).
作者
谢燕翔
李琳
叶芳霞
付福兴
李雷
何斌锋
刘明霞
Xie Yanxiang;Li Lin;Ye Fangxia;Fu Fuxing;Li Lei;He Binfeng;Liu Mingxia(School of Mechanical and Material Engineering,Xi’an University,Xi’an Shaanxi 710065,China;Shaanxi Key Laboratory of Surface Engineering and Remanufacturing,Xi’an University,Xi’an Shaanxi 710065,China;School of Materials Science and Engineering,Xi’an University of Architecture&Technology,Xi’an Shaanxi 710055,China)
出处
《金属热处理》
CAS
CSCD
北大核心
2022年第7期241-244,共4页
Heat Treatment of Metals
基金
陕西省自然科学基础研究计划(2022JM-187)
西安市科技计划创新基金(2020KJWL01)
陕西省表面工程与再制造重点实验室天元开放基金(tywl2019-15)。
