scholarly journals Research on Microstructure and Properties of 304 Stainless Steel Made by MIG Filler Additive Manufacturing

2019 ◽  
Vol 237 ◽  
pp. 032096
Author(s):  
Yishan Bai ◽  
Qingwei Gao ◽  
Xin Chen ◽  
Hao Yin ◽  
Longfei Fang ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Additive Manufacturing ◽  
304 Stainless Steel ◽  
Microstructure And Properties

Microstructure and Properties of 304 Stainless Steel Specimen Manufactured by Cold Metal Transfer + Pulse Composite Arc Additive

2021 ◽  
Vol 13 (1) ◽  
pp. 152-160
Author(s):  
Yanjie Wang ◽  
Xuru Hou ◽  
Lin Zhao ◽  
Yun Peng ◽  
Chengyong Ma ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Additive Manufacturing ◽  
Fracture Surface ◽  
Steel Specimen ◽  
Corrosion Current ◽  
Electrochemical Analysis ◽  
304 Stainless Steel ◽  
Cold Metal Transfer ◽  
Σ Phase ◽  
Microstructure And Properties

304 stainless steel test block was fabricated by continuous melting wire with CMT and pulse mixed mode, and the path of additive manufacturing is layered slice S-shaped. The relationship between microstructure and properties of the specimen was investigated by microscope, SEM, EBSD, XRD, tensile, impact and electrochemical experiments. The results show that molding between weld and weld is very good, and the microstructure is mainly Austenite, Ferrite and a little of σ, and there are three kinds of Ferrite morphology: cellular, wormlike and lath. σ phase precipitates easily in regions with high ferrite content and is distributed at the boundary between austenite and ferrite. The specimen has good low temperature toughness. The microscopic fracture surface is mainly dimple, and the precipitates in the fracture surface are mainly fine carbide particles. The tensile strength of the additive manufacturing 304 specimen is higher than the forged specimen, and the type of fracture is ductile fracture. The electrochemical analysis of 304 stainless steel specimens and forgings shows that CMT and pulse arc additive manufacturing specimen has excellent corrosion resistance and its corrosion current is slightly lower than the forging.

Microstructure and Properties of 316 Stainless Steel Produced by Laser-Induced Arc Hybrid Additive Manufacturing

2019 ◽  
Vol 46 (12) ◽  
pp. 1202006
Author(s):  
李旭文 Li Xuwen ◽  
宋刚 Song Gang ◽  
张兆栋 Zhang Zhaodong ◽  
刘黎明 Liu Liming
Keyword(s):  
Stainless Steel ◽  
Additive Manufacturing ◽  
Microstructure And Properties ◽  
316 Stainless Steel

scholarly journals Spheroidisation of Stainless Steel Powder for Additive Manufacturing

Metals ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1081
Author(s):  
Silethelwe Chikosha ◽  
Lerato C. Tshabalala ◽  
Hertzog Bissett ◽  
Miltia Lesufi ◽  
Ndumiso K. Mnguni ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Additive Manufacturing ◽  
Fine Particles ◽  
Steel Powder ◽  
304 Stainless Steel ◽  
Aisi 304 Stainless Steel ◽  
Aisi 304 ◽  
Plasma Spheroidization ◽  
Powder Characteristics ◽  
Powder Properties

In additive manufacturing, powder characteristics play an important role in terms of flowability and densification, which can be improved by the use of spherical powders. In this study, irregular powder was spheroidised by plasma treatment, and the powder properties were measured. Powder characterisation was conducted to determine the morphology, particle size and distribution as well as the flowability. Spherical AISI 304 stainless steel powders were produced by plasma spheroidization, and the efficiency of the spheroidisation process was evaluated. The spheroidisation process resulted in 93% efficiency with a decrease of fine particles (<63 µm) by 22%, while the all the flowability parameters of the powder improved significantly.

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