Additive manufacturing of novel ferritic stainless steel by selective laser melting: Role of laser scanning speed on the formability, microstructure and properties

被引：60

作者：

Jiang, P. F. ^{[1
]}

Zhang, C. H. ^{[1
]}

Zhang, S. ^{[1
]}

Zhang, J. B. ^{[2
]}

Chen, J. ^{[2
]}

Chen, H. T. ^{[2
]}

机构：

[1] Shenyang Univ Technol, Sch Mat Sci & Engn, Shenyang 110870, Liaoning, Peoples R China

[2] Shenyang Dalu Laser Technol CO LTD, Shenyang 110136, Liaoning, Peoples R China

来源：

OPTICS AND LASER TECHNOLOGY | 2021年 / 140卷

关键词：

Selective laser melting; Novel stainless steel; Laser scanning speed; Corrosion performance; Wear property; CORROSION BEHAVIOR; TENSILE PROPERTIES; PHASE EVOLUTION; HEAT-TREATMENT; WEAR BEHAVIOR; ALLOY-STEEL; 316L; PRECIPITATION; DEFORMATION; RESISTANCE;

D O I：

10.1016/j.optlastec.2021.107055

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Novel ferritic stainless steel was successfully fabricated by selective laser melting (SLM) technology. This study was dedicated to the effect of laser scanning speed on the formability, microstructural evolution, wear and corrosion performance of SLM novel stainless steel. The results showed that the densification level of the SLM specimens was significantly improved with the increase of laser energy density due to the reduction in pore defects. The microstructure of the SLM specimens was mainly composed of ?-Fe, with a small amount of Cr23C6. The EBSD pattern of the SLM specimens showed anisotropy due to complex thermal convection in the SLM process. The proportion of the LAGBs and ?-Fe increased with the increase of laser scanning speed while the average grain size decreased from 0.481 to 0.467 ?m. The SLM specimens possessed excellent properties, with the corrosion resistance significantly higher than that of some common engineering alloys. The best SLM specimen possessed a corrosion potential of -148 mV SCE, a corrosion current density of 1.38 x 10-7 A cm-2, microhardness of 812 HV, and a specific wear rate of 1.99 x 10-6 mm3/Nm.

引用

页数：12

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