激光与光电子学进展, 2020, 57 (3): 031404, 网络出版: 2020-02-17   

选区激光熔化技术制备GH4169合金的致密度研究 下载: 1022次

Relative Density of GH4169 Superalloy Prepared by Selective Laser Melting
作者单位
中国航发北京航空材料研究院3D打印研究与工程技术中心, 北京 100095
摘要
使用选区激光熔化技术,通过改变激光功率和扫描速度进行阵列实验,获得了多组GH4169块体。计算能量输入密度并测量块体的致密度,观察其组织的孔隙情况与微观形貌。结果表明:扫描速度太低时,组织内产生圆形气孔;扫描速度过高时,组织内产生不规则形状的孔隙。而在扫描速度为0.9~1.5 m/s、激光功率为260~350 W的合理工艺参数下,可成形致密度较高、孔隙较少的样件,最高致密度为99.7%。致密度良好的块体微观组织呈柱状树枝晶形态,随着能量输入密度的提升,枝晶生长稳定并逐步细化。
Abstract
Herein, selective laser melting technology is applied to preparing block samples of multiple sets of GH4169 by changing the laser power and adjusting the scanning speed. The power density of the block samples is calculated, the relative density of the prepared samples is measured, and pores and microstructures of the samples are also observed. Results show that, at a very low scanning speed, the microstructural view of the samples shows circular pores, whereas at a very high scanning speed, irregular shaped pores appear on the microstructure. The parameters suitable for the scanning process include a scanning speed of 0.9-1.5 m/s and the laser power of 260-350 W, samples having higher relative density and lesser pores can be formed, and the highest relative density is 99.7%. The microstructural morphology of the samples with high relative density is in the form of columnar dentrites. As the energy input density increases, there is a gradual refinement in the dendrite growth as well as in the stability.

张国会, 郭绍庆, 黄帅, 周标, 闫泰起, 陈冰清, 张学军. 选区激光熔化技术制备GH4169合金的致密度研究[J]. 激光与光电子学进展, 2020, 57(3): 031404. Guohui Zhang, Shaoqing Guo, Shuai Huang, Biao Zhou, Taiqi Yan, Bingqing Chen, Xuejun Zhang. Relative Density of GH4169 Superalloy Prepared by Selective Laser Melting[J]. Laser & Optoelectronics Progress, 2020, 57(3): 031404.

本文已被 5 篇论文引用
被引统计数据来源于中国光学期刊网
引用该论文: TXT   |   EndNote

相关论文

加载中...

关于本站 Cookie 的使用提示

中国光学期刊网使用基于 cookie 的技术来更好地为您提供各项服务,点击此处了解我们的隐私策略。 如您需继续使用本网站,请您授权我们使用本地 cookie 来保存部分信息。
全站搜索
您最值得信赖的光电行业旗舰网络服务平台!