中国激光, 2019, 46 (10): 1002011, 网络出版: 2019-10-25
多次激光修复对ZTC4钛合金组织与硬度的影响 下载: 841次
Effects of Multiple Laser Repairs on Microstructure and Hardness of ZTC4 Titanium Alloy
摘要
采用了同轴送粉式激光熔覆技术对ZTC4钛合金板材上的圆孔形缺陷进行修复,研究了多次激光修复对ZTC4钛合金组织、热影响区尺寸及修复件硬度分布的影响。结果表明:修复件热影响区呈现为网篮组织→集束组织→针状马氏体的过渡,修复区组织主要由粗大的β柱状晶和内部的魏氏组织组成,且修复区顶部魏氏组织的长度更长;随着修复次数增多,热影响区尺寸明显增大,但硬度的增大并不明显。
Abstract
A hole defect in the ZTC4 titanium alloy plate is repaired by the coaxial powder-feeding laser-cladding technology. The effects of multiple laser repairs on the microstructure, heat-affected zone size, and hardness distribution of repaired parts are investigated. The result shows that the heat-affected zone of the repaired specimen exhibits a microstructural transition from a basketweave structure to a colonies structure,and then transition to a needle-shaped martensite. The repaired area primarily comprises a coarse β-columnar crystal and widmanstatten structure, which is longer at the top of the repaired area. During multiple repairs, the size of the heat-affected zone considerably increases. However, the hardness of the heat-affected zone only increases slightly.
潘博, 黄怡晨, 李俐群, 陶汪. 多次激光修复对ZTC4钛合金组织与硬度的影响[J]. 中国激光, 2019, 46(10): 1002011. Bo Pan, Yichen Huang, Liqun Li, Wang Tao. Effects of Multiple Laser Repairs on Microstructure and Hardness of ZTC4 Titanium Alloy[J]. Chinese Journal of Lasers, 2019, 46(10): 1002011.