回火对激光增材制造12CrNi2合金钢显微组织和力学性能的影响
Effect of tempering on microstructure and mechanical properties of the 12CrNi2 alloy steel prepared by laser additive manufacturing
查看参考文献19篇
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文摘
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以12CrNi2合金钢粉末为原料,采用激光熔化沉积技术制备了12CrNi2合金钢。采用光学显微镜、扫描电镜、显微硬度计和拉伸试验等研究了合金钢经不同热处理后的组织和性能。结果表明:制备的12CrNi2合金钢的组织主要由铁素体和少量奥氏体岛组成,经860 ℃淬火处理后转变为板条马氏体组织,合金的抗拉强度和屈服强度明显增加但伸长率显著降低。经200 ℃~500 ℃回火2 h后,随回火温度的升高,马氏体板条特征逐渐消失,不同类型碳化物不同程度析出,这导致合金钢抗拉强度和屈服强度连续降低而伸长率有所提高。 |
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其他语种文摘
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12CrNi2 alloy steel was prepared by laser melting deposition with 12CrNi2 alloy steel powder as raw material.Microstructure and properties of the 12CrNi2 alloy steel after different heat treatment were studied by means of optical microscope,scanning electron microscopy,microhardness tester and tensile test.The results show that the microstructure of the 12CrNi2 alloy steel is mainly composed of ferrite and a small amount of austenite island.After quenching at 860 ℃,the microstructure of the alloy steel is transformed into lath martensite,and the tensile strength and yield strength of the alloy steel increase obviously,but the elongation decreases significantly.After tempering at 200-500 ℃ for 2 h,the characteristics of lath martensite gradually disappear with the increase of tempering temperature,and different types of carbides precipitate in different degrees,which leads to the continuous decrease of tensile strength and yield strength of the alloy steel and the increase of elongation. |
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来源
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材料热处理学报
,2020,41(2):59-66 【核心库】
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DOI
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10.13289/j.issn.1009-6264.2019-0287
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关键词
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激光增材制造
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合金钢
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回火
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显微组织
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力学性能
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地址
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1.
中国科学技术大学材料科学与工程系, 安徽, 合肥, 230026
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中国科学院金属研究所, 金属腐蚀与防护国家重点实验室, 辽宁, 沈阳, 110016
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南昌航空大学材料科学与工程学院, 江西, 南昌, 330063
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语种
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中文 |
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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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1009-6264 |
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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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国家重点研发计划项目
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文献收藏号
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CSCD:6676416
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