Water Atomized 17-4 PH Stainless Steel Powder as a Cheaper Alternative Powder Feedstock for Selective Laser Melting

被引：12

作者：

Ghayoor, Milad ^{[1
,2
]}

Badwe, Sunil B. ^{[2
]}

Irrinki, Harish ^{[3
]}

Atre, Sundar V. ^{[3
]}

Pasebani, Somayeh ^{[1
,2
]}

机构：

[1] Oregon State Univ, Sch Mech Ind & Mfg Engn, Corvallis, OR 97330 USA

[2] North Amer Hoganas, Johnstown, PA 15902 USA

[3] Univ Louisville, Dept Mech Engn, Louisville, KY 40292 USA

来源：

THERMEC 2018: 10TH INTERNATIONAL CONFERENCE ON PROCESSING AND MANUFACTURING OF ADVANCED MATERIALS | 2018年 / 941卷

关键词：

17-4 PH SS; Selective Laser Melting; Water atomized powder; Feedstock; MECHANICAL-PROPERTIES; MICROSTRUCTURE; TEMPERATURE;

D O I：

10.4028/www.scientific.net/MSF.941.698

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Gas and water atomized 17-4 PH stainless steel powder were used as powder feedstock in selective laser melting (SLM) process. The effect of different heat treatment cycles on SLMed parts were investigated. Gas atomized samples showed martensitic microstructure after SLM following heat treatment at 1051 degrees C and 1315 degrees C. However, as printed and lower-temperature (1051 degrees C) heat treated water atomized samples revealed a mixture of martensite and austenite phases. Using higher temperature for solutionizing of water atomized powder (1315 degrees C), improved the YS to 1000 MPa and UTS to 1261 MPa which were comparable to those of gas atomized 17-4 PH samples and wrought 17-4PH. This improvement could be attributed to presence of fine martensitic microstructure in water atomized samples solutionized at 1315 degrees C followed by aging at 482 degrees C. Therefore, by choosing the right heat treatment cycle, cheaper water atomized powder could potentially be used in SLM process as an alternative to more expensive gas atomized powder feedstock.

引用

页码：698 / 703

页数：6

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