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扫描速度对选区激光熔化316L不锈钢粉末成形缺陷及性能的影响

Effect of Scanning Speed on Forming Defects and Properties of Selective Laser Melted 316L Stainless Steel Powder

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摘要

采用选区激光熔化技术研究了扫描速度和线间距对316L不锈钢粉末成形的影响。结果表明,当激光功率为380 W,铺粉层厚为50 μm,线间距为90~130 μm,扫描速度为750 mm·s-1时,成形试样的致密度最高达99.99%,屈服强度、拉伸强度和延伸率分别为625 MPa、537 MPa和38%。扫描速度对试样缺陷的形成有很大影响。适当增大扫描速度可细化试样的晶粒,提高其力学性能。

Abstract

The 316L stainless steel powder is formed by the selective laser melting technique, and the effects of scanning speed and hatch space on the formation specimen are investigated. When the laser power is 380 W, the layer thickness is 50 μm, the hatch space is 90-130 μm, and the scanning speed is 750 mm·s-1, the density of the formation specimen is up to 99.99%, and the yield strength, tensile strength, and elongation are 625 MPa, 537 MPa, and 38%, respectively. The scanning speed strongly influences the defect formation in the specimens. As for the formation samples, their mechanical properties can be improved and the grains can be refined by suitably increasing the scanning speed.

Newport宣传-MKS新实验室计划
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中图分类号:TN249;TB31

DOI:10.3788/lop56.101403

所属栏目:激光器与激光光学

基金项目:国家自然科学基金(51505006)、2018 年研究生科研能力提升计划项目、2017学位与研究生教育资助项目(11000101010)

收稿日期:2018-10-15

修改稿日期:2018-11-28

网络出版日期:2018-01-04

作者单位    点击查看

马英怡:北京工商大学材料与机械工程学院, 北京 100048
刘玉德:北京工商大学材料与机械工程学院, 北京 100048
石文天:北京工商大学材料与机械工程学院, 北京 100048
王朋:北京工商大学材料与机械工程学院, 北京 100048
祁斌:北京工商大学材料与机械工程学院, 北京 100048
杨锦:北京工商大学材料与机械工程学院, 北京 100048
韩冬:北京工商大学材料与机械工程学院, 北京 100048

联系人作者:联系作者(liu_yude@163.com)

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引用该论文

Ma Yingyi,Liu Yude,Shi Wentian,Wang Peng,Qi Bin,Yang Jin,Han Dong. Effect of Scanning Speed on Forming Defects and Properties of Selective Laser Melted 316L Stainless Steel Powder[J]. Laser & Optoelectronics Progress, 2019, 56(10): 101403

马英怡,刘玉德,石文天,王朋,祁斌,杨锦,韩冬. 扫描速度对选区激光熔化316L不锈钢粉末成形缺陷及性能的影响[J]. 激光与光电子学进展, 2019, 56(10): 101403

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