选区激光熔化成形Inconel 625合金的显微组织及力学性能

杨启云; 吴玉道; 沙菲

doi:10.11973/jxgccl201606018

选区激光熔化成形Inconel 625合金的显微组织及力学性能

1.
上海材料研究所, 上海 200437
2.
上海3D打印材料工程技术研究中心, 上海 200437

基金项目:

上海市产学研合作计划项目（沪CXY-2013-17）

详细信息

作者简介:
杨启云（1988-）, 男, 山西大同人, 硕士研究生。

中图分类号: TG113.25; TG115.21
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出版历程
- 收稿日期: 2016-04-25
- 刊出日期: 2016-06-19

Microstructure and Mechanical Properties of Inconel 625 Alloy Manufactured by Selective Laser Melting

摘要

摘要: 采用雾化方法制备了Inconel 625合金粉, 利用选区激光熔化成形技术将该合金粉直接成形制备了金相、拉伸和冲击试样, 研究了其表面残余应力、显微组织及退火前后的力学性能。结果表明:试样表面有少量微裂纹, 内部存在少量碳氧夹杂物颗粒, 显微组织均匀致密, 由单一奥氏体相组成; 退火前试样的表面残余拉应力为398 MPa, 高于经1 140 ℃×2 h退火处理后试样的（242 MPa）, 其平均屈服强度、抗拉强度、冲击功、断后伸长率和断面收缩率分别为743 MPa, 1 043 MPa, 139 J, 31.4%和49.6%, 而退火处理后试样的屈服强度、抗拉强度降低, 冲击功、伸长率和断面收缩率有所增加;退火前试样的拉伸和冲击断口均呈韧性断裂特征。
- 选区激光熔化 /
- 显微组织 /
- 力学性能
Abstract: The Inconel 625 alloy powder was prepared by the powder atomization method, and then the metallographic, tensile and impact specimens were directly formed with the alloy powder by the selective laser melting technology. The surface residual stresses, microstructures and mechanical properties of the specimens before and after annealing were studied. The results show that a small amount of micro cracks were observed at the surface of the specimen and few oxycarbide inclusion particles existed inside the specimen. The microstructure was uniformity and dense and consisted of the single austenite phase. The surface residual stress of the specimen before annealing was 398 MPa, which was higher than 242 MPa of the specimen after annealing at 1 140 ℃ for 2 h. The average yield strength, tensile strength, impact energy, percentage elongation and reduction of area were 743 MPa, 1 043 MPa, 139 J, 31.4% and 49.6% respectively. After annealing, the yield strength and tensile strength of the specimen decreased while the impact energy, percentage elongation and reduction of area improved. The tensile and impact fracture of the specimen before annealing showed a ductile fracture characteristic.
- selective laser melting /
- microstructure /
- mechanical property

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参考文献(15)

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选区激光熔化成形Inconel 625合金的显微组织及力学性能

作者简介: 杨启云（1988-）, 男, 山西大同人, 硕士研究生。

计量

出版历程

Microstructure and Mechanical Properties of Inconel 625 Alloy Manufactured by Selective Laser Melting

计量

出版历程

目录

作者简介:
杨启云（1988-）, 男, 山西大同人, 硕士研究生。