Electrochemical Corrosion Behavior of 18Ni 300 Maraging Steel Obtained by Laser Cladding Deposition and Selective Laser Melting in Corrosive Mediums: A Comparative Study

被引：0

作者：

Wang, Qun ^{[1
]}

Huang, Jiaqi ^{[2
]}

Guan, Li ^{[2
]}

Zhang, Yi ^{[2
]}

Jiang, Peng ^{[2
]}

Chen, Jiankang ^{[1
]}

Yuan, Xinhua ^{[3
]}

Wu, Wangping ^{[2
]}

机构：

[1] Ningbo Univ, Sch Mech Engn & Mech, Key Lab Impact & Safety Engn, Ningbo 315211, Peoples R China

[2] Changzhou Univ, Electrochem & Corros Lab, Sch Mech Engn & Rail Transit, Changzhou 213164, Jiangsu, Peoples R China

[3] Univ Chinese Acad Sci, HwaMei Hosp, Dept Orthopaed, Ningbo 315010, Peoples R China

来源：

JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE | 2022年 / 31卷 / 10期

基金：

中国国家自然科学基金;

关键词：

additive manufacturing; electrochemical corrosion; laser cladding deposition; maraging steel; selective laser melting; 316L STAINLESS-STEEL; MECHANICAL-PROPERTIES; ALKALINE-SOLUTIONS; HEAT-TREATMENT; NANOPRECIPITATION; MICROSTRUCTURE; EVOLUTION; CHLORIDE; PH;

D O I：

10.1007/s11665-022-06849-7

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

18Ni 300 maraging steel parts were prepared by laser cladding deposition (LCD) and powder bed selective laser melting (SLM) processes. Electrochemical corrosion behaviors of as-printed steel parts were evaluated in acidic, basic, and neutral aqueous solutions, including 10% H2SO4, 3.5% NaCl, 10% NaOH and 10% Na2S. The crystallographic phases and microstructure of as-fabricated steel parts were determined by x-ray diffraction and scanning electron microscopy, respectively. Meanwhile, electrochemical corrosion behaviors of as-built steel parts by LCD and SLM processes in the corroding solution were evaluated by immersion test, potentiodynamic polarization and electrochemical impedance spectroscopy techniques. The results show that as-printed steel parts mainly contained martensite phase and a small quantity of retained austenite. The density of LCD steel part was much more than that of SLM steel part. LCD steel part comprised high martensite content due to high power for Nd:YAG solid pulse laser. Electrochemical corrosion resistance of SLM steel part was better than that of LCD steel part in 10% H2SO4 solution due to high volume fraction of retained austenite unevenly distributed in SLM steel part. However, the corrosion resistance of as-melted steel part by LCD process has an opposite effect in other corrosive solutions due to high density and better chemical homogeneity, compared with as-built steel part by SLM process. The corrosion rates of 18Ni 300 maraging steel parts printed by LCD and SLM processes in the corroding solution ascended in the order of NaOH < NaCl < Na2S < H2SO4.

引用

页码：8389 / 8404

页数：16

共 41 条

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