The formability and microstructure evolution of 24CrNiMo alloy steel fabricated by selective laser melting

被引：38

作者：

Han, Y. R. ^{[1
]}

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

Cui, X. ^{[1
]}

Zhang, S. ^{[1
]}

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

Liu, Y. ^{[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：

VACUUM | 2020年 / 175卷

关键词：

24CrNiMo alloy steel; Selective laser melting; Formability; Microstructure evolution; TEM; MECHANICAL-PROPERTIES; TEMPERED MARTENSITE; TENSILE PROPERTIES; SCANNING STRATEGY; THERMAL-BEHAVIOR; PHASE EVOLUTION; GRAIN-STRUCTURE; STRENGTH; TEMPERATURE; PERFORMANCE;

D O I：

10.1016/j.vacuum.2020.109297

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this paper, 24CrNiMo alloy steel samples under different process parameters were fabricated by selective laser melting technology with an orthogonal experiment in argon atmosphere. The results under the present experimental conditions showed that the formability of 24CrNiMo alloy steel samples was improved significantly as the laser energy density increased in a proper range. The most dense sample was selected for further observation. It was found that the sample was composed of quenched martensite laths, tempered martensite laths and lower bainite with upper bainite ferrite along the building direction. Through further transmission electron microscopy observation, different types of precipitated phases were also found. Electron backscatter diffraction analysis showed that the crystals in the manufacturing process were isotropic with no preferred crystallographic orientation, and the grain size were smaller than 0.5 mu m. The distribution of grain boundaries indicated that large proportion of low-grain boundaries occupied the sample, which elevated the grain boundary strengthening effect.

引用

页数：10

共 58 条

[1] Mechanical behavior of CrMo steel with tempered martensite and ferrite-bainite-martensite microstructure [J].

Abdollah-Zadeh, A. ;

Salemi, A. ;

Assadi, H. .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2008, 483-84 :325-328

[2] Thermal behavior of the molten pool, microstructural evolution, and tribological performance during selective laser melting of TiC/316L stainless steel nanocomposites: Experimental and simulation methods [J].

AlMangour, Bandar ;

Grzesiak, Dariusz ;

Cheng, Jinquan ;

Ertas, Yavuz .

JOURNAL OF MATERIALS PROCESSING TECHNOLOGY, 2018, 257 :288-301

[3] Simulations of microstructure coupling with moving molten pool by selective laser melting using a cellular automaton [J].

Ao, Xiaohui ;

Xia, Huanxiong ;

Liu, Jianhua ;

He, Qiyang .

MATERIALS & DESIGN, 2020, 185

[4] Effect of laser energy density on defects behavior of direct laser depositing 24CrNiMo alloy steel [J].

Cao, Lin ;

Chen, Suiyuan ;

Wei, Mingwei ;

Guo, Qian ;

Liang, Jing ;

Liu, Changsheng ;

Wang, Mei .

OPTICS AND LASER TECHNOLOGY, 2019, 111 :541-553

[5] The role of the austenite grain size in the martensitic transformation in low carbon steels [J].

Celada-Casero, Carola ;

Sietsma, Jilt ;

Santofimia, Maria Jesus .

MATERIALS & DESIGN, 2019, 167

[6] A novel approach to direct preparation of complete lath martensite microstructure in tool steel by selective laser melting [J].

Chen, Hongyu ;

Gu, Dongdong ;

Dai, Donghua ;

Xia, Mujian ;

Ma, Chenglong .

MATERIALS LETTERS, 2018, 227 :128-131

[7] Effect of Intercritical Dislocation Multiplication to Mn Partitioning and Microstructure Evolution of Bainite in Low Carbon Steel [J].

Chen Liansheng ;

Li Yue ;

Zhang Mingshan ;

Tian Yaqiang ;

Zheng Xiaoping ;

Xu Yong ;

Zhang Shihong .

ACTA METALLURGICA SINICA, 2017, 53 (11) :1418-1426

[8] Microstructure and fatigue behavior of a laser additive manufactured 12CrNi2 low alloy steel [J].

Cui, X. ;

Zhang, S. ;

Wang, C. ;

Zhang, C. H. ;

Chen, J. ;

Zhang, J. B. .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2020, 772

[9] The impact of powder oxygen content on formability of 12CrNi2 alloy steel fabricated by laser melting deposition [J].

Cui, X. ;

Zhang, S. ;

Zhang, C. H. ;

Wu, C. L. ;

Zhang, J. B. ;

Liu, Y. ;

Abdullah, Adil O. .

POWDER METALLURGY, 2019, 62 (03) :186-195

[10] Additive manufacturing of metallic components - Process, structure and properties [J].

DebRoy, T. ;

Wei, H. L. ;

Zuback, J. S. ;

Mukherjee, T. ;

Elmer, J. W. ;

Milewski, J. O. ;

Beese, A. M. ;

Wilson-Heid, A. ;

De, A. ;

Zhang, W. .

PROGRESS IN MATERIALS SCIENCE, 2018, 92 :112-224

← 1 2 3 4 5 6 →