刘延星,孙振忠,张玉勋,等.扫描间隙对激光粉床熔融GH4169合金微观组织及硬度的影响[J].精密成形工程,2021,13(1):84-87.
LIU Yan-xing,SUN Zhen-zhong,ZHANG Yu-xun,et al.Influences of Hatch Distance on Microstructure and Hardness of GH4169 Fabricated by Laser Powder Bed Fusion[J].Journal of Netshape Forming Engineering,2021,13(1):84-87. |
| 扫描间隙对激光粉床熔融GH4169合金微观组织及硬度的影响 |
| Influences of Hatch Distance on Microstructure and Hardness of GH4169 Fabricated by Laser Powder Bed Fusion |
| 投稿时间：2020-08-30 |
| DOI：10.3969/j.issn.1674-6457.2021.01.011 |
| 中文关键词: 激光粉床 GH4169 扫描间隙 微观组织 |
| 英文关键词: laser powder bed GH4149 hatch distance microstructure |
| 基金项目:国家自然科学基金(51905098);广东省省级科技计划(2017B090911015);国家重点研发计划(2017YFB1300203) |
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| 中文摘要: |
| 目的 研究相同激光功率、扫描速度及粉层厚度条件下，激光粉床熔融GH4169合金微观组织、硬度及密度在不同扫描间隙条件下的演变规律。方法 采用激光粉床熔融设备制备了GH4169合金试样，通过扫描电子显微镜对微观组织进行了观察，采用硬度仪测量了试样硬度，基于阿基米德原理测量了试样密度。结果 随着扫描间隙的增加，激光粉床熔融GH4169合金的熔合不良缺陷增多，密度逐渐降低。结论 扫描间隙对激光粉床熔融GH4169合金的微观组织、硬度及密度具有显著影响，合理选取扫描间隙参数，可有效减少熔合不良缺陷，提高致密度和硬度。 |
| 英文摘要: |
| The work aims to study the evolution of microstructure, hardness and density of GH4169 alloy fabricated by laser powder bed fusion under different hatch distances, the same laser power, scanning speed and powder thickness. GH4169 specimens were fabricated by laser powder bed fusion. Their microstructure was observed with scanning electron microscopy. Their hardness was measured with hardness tester and their density also measured based on the Archimedes principle. With the increase of hatch distance, the amount of lack-of-fusion defects increased and the density decreased. It is found that the influences of hatch distance on the microstructure, harness and density of these specimens are significant. Carefully choosing of hatch distance parameters can effectively reduce lack-of-fusion defects and improve the density and harness. |
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