体能量密度对SLM成形316L不锈钢耐腐蚀性的影响

doi:10.13251/j.issn.0254-6051.2022.05.024

金属热处理 ›› 2022, Vol. 47 ›› Issue (5): 148-154.DOI: 10.13251/j.issn.0254-6051.2022.05.024

体能量密度对SLM成形316L不锈钢耐腐蚀性的影响

李鹏^1,2, 孔令华^1,2, 练国富^1,2, 黄旭^1,2, 李铸^1,2

1.福建工程学院机械与汽车工程学院, 福建福州 350118;
2.数字福建工业制造物联网实验室, 福建福州 350118

收稿日期:2021-12-02 修回日期:2022-03-15 出版日期:2022-05-25 发布日期:2022-06-16
通讯作者: 孔令华,教授,博士,E-mail: 15392030898@163.com
作者简介:李鹏(1996—),男,硕士研究生,主要研究方向为金属性能的光谱分析,E-mail: yiyezhiqiu239360@163.com。
基金资助:
福建省科技重大专项专题项目(2020HZ03018)

Influence of bulk energy density on corrosion resistance of 316L stainless steel formed by SLM

Li Peng^1,2, Kong Linghua^1,2, Lian Guofu^1,2, Huang Xu^1,2, Li Zhu^1,2

1. School of Mechanical & Automotive Engineering, Fujian University of Technology, Fuzhou Fujian 350118, China;
2. Digital Fujian Industrial Manufacture IOT Lab, Fuzhou Fujian 350118, China

Received:2021-12-02 Revised:2022-03-15 Online:2022-05-25 Published:2022-06-16

摘要/Abstract

摘要： 为了探究不同体能量密度对SLM成形316L不锈钢耐腐蚀性的影响,采用正交试验法制备不同激光功率、扫描间距和扫描速度下的SLM 316L不锈钢成形件,利用扫描电镜和电化学试验对其微观组织和自腐蚀电位进行观察和测量。结果表明,体能量密度过大或过小时,成形件表面的气孔和孔洞等缺陷较多,自腐蚀电位减小,耐腐蚀性变差。体能量密度为44.64 J/mm^-3时,SLM 316L不锈钢成形件的自腐蚀电位最高,组织表面的气孔等缺陷相对较少,耐腐蚀性最好。激光功率、扫描间距和扫描速度对SLM 316L不锈钢成形件的耐腐蚀性影响的次序为:激光功率＞扫描间距和扫描速度,最佳的工艺参数组合为激光功率250 W,扫描间距0.14 mm,扫描速度800 mm/s。

关键词: 316L不锈钢, 体能量密度, 缺陷, 耐腐蚀性

Abstract: In order to explore the effect of different bulk energy density on corrosion resistance of SLM formed 316L stainless steel, SLM 316L stainless steel formed parts were prepared under different laser power, scanning spacing and scanning speed by orthogonal test method. The microstructure and self-corrosion potential were observed and measured by means of scanning electron microscope and electrochemical test. The results show that if the bulk energy density is too large or very small, there are more defects such as pores and holes on the surface of the molded parts, the self-corrosion potential is decreased, and the corrosion resistance is deteriorated. When the bulk energy density is 44.64 J/mm^-3, the self-corrosion potential of SLM 316L stainless steel molded parts is the highest, the defects such as pores on the surface are relatively few, and the corrosion resistance is the best. The order of the factor of laser power, scanning distance and scanning speed on the corrosion resistance of SLM 316L stainless steel molded parts is: laser power > scanning distance and scanning speed. The best combination of process parameters is laser power of 250 W, scanning spacing of 0.14 mm and scanning speed of 800 mm/s.

Key words: 316L stainless steel, bulk energy density, defects, corrosion resistance

中图分类号:

TG142.71

李鹏, 孔令华, 练国富, 黄旭, 李铸. 体能量密度对SLM成形316L不锈钢耐腐蚀性的影响[J]. 金属热处理, 2022, 47(5): 148-154.

Li Peng, Kong Linghua, Lian Guofu, Huang Xu, Li Zhu. Influence of bulk energy density on corrosion resistance of 316L stainless steel formed by SLM[J]. Heat Treatment of Metals, 2022, 47(5): 148-154.

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体能量密度对SLM成形316L不锈钢耐腐蚀性的影响

Influence of bulk energy density on corrosion resistance of 316L stainless steel formed by SLM

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