Effect of laser incident energy on microstructures and mechanical properties of 12CrNi2Y alloy steel by direct laser deposition
查看参考文献35篇
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文摘
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This work aims to establish the effect of laser energy area density (EAD) as the laser incident energy on density, microstructures and mechanical properties of direct laser deposition (DLD) 12CrNi2Y alloy steel. The results show that the density of DLD 12CrNi2Y alloy steel increases at initial stage and then decreases with an increase of EAD, the highest density of alloy steel sample is 98.95%. The microstructures of DLD 12CrNi2Y alloy steel samples are composed of bainite, ferrite and carbide. With increase of EAD, the microstructures transform from polygonal ferrite (PF) to granular bainite (GB). The martensite-austenite constituent (M-A) in GB transforms from flake-like paralleling to the bainite ferrite laths to granular morphology. It is also found that the average width of laths in finer GB can be refined from 532nm to 302 nm, which improves the comprehensive properties of DLD 12CrNi2Y alloy steel such as high hardness of 342±9 HV_(0.2), yield strength of 702±16 MPa, tensile strength of 901±14MPa and large elongation of 15.2%±0.6%. The DLD 12CrNi2Y material with good strength and toughness could meet the demand of alloy steel components manufacturing. |
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来源
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Journal of Materials Science & Technology
,2019,35(2):395-402 【核心库】
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DOI
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10.1016/j.jmst.2018.10.024
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关键词
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Direct laser deposition
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Energy area density
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12CrNi2Y alloy steel
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Microstructures
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Mechanical properties
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地址
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1.
School of Materials Science and Engineering, Northeastern University, Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education), Shenyang, 110819
2.
Shenyang Dalu Laser Technology Co. Ltd., Shenyang, 110136
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语种
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英文 |
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文献类型
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研究性论文 |
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ISSN
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1005-0302 |
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学科
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金属学与金属工艺 |
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基金
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supported by the National Key R&D Program of China
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the Green Manufacturing System Integration Project of the Industry and Information Ministry of China (2017)
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the Research and development plan for the future emerging industries in Shenyang
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文献收藏号
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CSCD:6445290
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