热处理工艺对SLM成形汽车用Fe-35Mn铁基高锰合金组织与力学性能的影响

摘要
图/表
参考文献
相关文章 (15)

全文: PDF (1065 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要采用激光选区熔化(selective laser melting,SLM)成形技术制备汽车用Fe-35Mn铁基高锰合金,并分别采用固溶、时效以及固溶-时效3种不同的工艺进行热处理,分析和测试合金的显微组织与力学性能。结果表明：SLM成形态Fe-35Mn高锰合金经过固溶或固溶-时效处理后,晶粒细化,并生成许多孪晶。与固溶态合金相比,固溶-时效态合金的晶粒更大,晶粒中存在均匀分布的孪晶组织,并且孪晶尺寸更大。SLM成形态Fe-35Mn合金经过不同的热处理后,均生成α-Mn相。随拉伸应变提高,固溶态合金最早发生塑性变形,塑性最好;经过时效处理后,合金的抗拉强度与屈服强度提高,但冲击韧性与伸长率降低;经过固溶-时效处理后,合金的孔隙数量最少,冲击韧性与伸长率达到最大(分别为22.8 kV/J和21.6%),具有良好的塑性。SLM成形态及热处理态Fe-35Mn合金的拉伸断口均呈现韧窝断裂特征。固溶-时效态合金的拉伸断口孔隙数量最少,塑性最好。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章
	刘灵歌
	朱镜瑾
	田海兰

关键词 ：选区激光熔化, 高锰合金, 热处理, 力学性能, 组织, 拉伸, 孪晶, 韧窝

Abstract：The selective laser melting (SLM) was used to prepare Fe-35Mn Fe-based high Mn alloy for automobile. Three heat treatment processes, namely solid solution, aging, and solid solution-aging, were used to treat the alloy, and the microstructure and mechanical properties of the alloy were analyzed and tested. The results show that Fe-35Mn alloy prepared by SLM and treated by solid solution or solution-aging treatment can refine the grain and generate many twins. Compared with the alloy of solid solution treatment, larger size grains are formed after the solid solution aging treatment, and the twins size of solution aging alloy is larger than that of solution aging alloy. After different heat treatment, Fe-35Mn alloys all produce α-Mn phase. With the increase of tensile strain, the solution alloy has the earliest plastic deformation and the best plasticity. After aging treatment, the tensile strength and yield strength of high-Mn Fe-35Mn SLM alloy increase, but the impact toughness and elongation decrease. After solution aging treatment, the number of pores is the least, the impact toughness and elongation reach the maximum (22.8 kV/J and 21.6%, respectively), and the alloy has good plasticity. Both the morphology of SLM and the tensile fracture of heat-treated Fe-35mn alloy are dimple fracture. The solution aged alloy has the least number of pores and the best plasticity.

Key words： selective laser melting high manganese alloy heat treatment mechanical properties microstructure tensile twin dimple

收稿日期: 2019-05-27 出版日期: 2020-06-19

ZTFLH:

V261

基金资助:河南省科技厅科技攻关计划资助项目(172102210473)

通讯作者: 刘灵歌,讲师。电话：18638635297;E-mail: quedong9920290714@126.com

引用本文:

刘灵歌, 朱镜瑾, 田海兰. 热处理工艺对SLM成形汽车用Fe-35Mn铁基高锰合金组织与力学性能的影响[J]. 粉末冶金材料科学与工程, 2019, 24(6): 498-502.
LIU Lingge, ZHU Jingjin, TIAN Hailan. Effect of heat treatment process on microstructure and mechanical properties of SLM formed Fe-35Mn Fe based high manganese alloy for automobile. Materials Science and Engineering of Powder Metallurgy, 2019, 24(6): 498-502.

链接本文:

http://pmbjb.csu.edu.cn/CN/ 或 http://pmbjb.csu.edu.cn/CN/Y2019/V24/I6/498

[1] CARLUCCIO D, DEMIR A G, CAPRIO L, et al.The influence of laser processing parameters on the densification and surface morphology of pure Fe and Fe-35Mn scaffolds produced by selective laser melting[J]. Journal of Manufacturing Processes, 2019, 161(40): 69-78.
[2] 孙国宁, 徐萌波, 马文宇, 等. 新型建筑用铝锰合金的热变形行为[J]. 金属热处理, 2019, 44(5): 138-143.
SUN Guoning, XU Mengbo, MA Wenyu, et al.Thermal deformation behavior of aluminum manganese alloy for new building[J]. Metal Heat Treatment, 2019, 44(5): 138-143.
[3] 韦玉堂, 崔素华. 退火温度对车轻量化用热轧高锰钢组织和拉伸性能的影响[J]. 热加工工艺, 2019, 48(10): 224-226, 230.
WEI Yutang, CUI Suhua.Effect of annealing temperature on microstructure and tensile properties of hot rolled high manganese steel for vehicle lightweight rolling[J]. Hot Processing Technology, 2019, 48(10): 224-226, 230.
[4] 张宏志, 武玉平, 周建军, 等. 车用高锰钢履带板静压造型工艺研究[J]. 铸造, 2015, 64(10): 1036-1038, 1041.
ZHANG Hongzhi, WU Yuping, ZHOU Jianjun, et al.Study on static molding process of high manganese steel crawler plate for vehicle[J]. Casting, 2015, 64(10): 1036-1038, 1041.
[5] LI Han, WANG Yexin, CUI Zhenshan, et al.Degradation behavior and biocompatibility of Fe-35Mn alloy prepared by spray forming[J]. Corrosion Science and Protection Technology, 2008, 30(3): 244-250.
[6] 郝顺平, 汤志鹏, 赵国平, 等. 高锰阻尼合金的制备工艺及性能研究[J]. 铸造技术, 2018, 39(5): 992-995, 999.
HAO Shunping, TANG Zhipeng, ZHAO Guoping, et al.Study on preparation technology and properties of high manganese damping alloy[J]. Casting Technology, 2008, 39(5): 992-995, 999.
[7] LIU Y, LI X B, CHEN C, et al.High throughput rapid detection for SLM manufactured elements using ultrasonic measurement[J]. Measurement, 2019, 236(144): 621-629.
[8] BAIK S H.High damping Fe-Mn martensitic alloys for engineering applications[J]. Nuclear Engineering & Design, 2000, 198(3): 241-252.
[9] YU X Y, GAO G L, YUAN L.Research development of Fe-Mn based high damping alloys[J]. Foundry Technology, 2012, 33(7): 774-776.
[10] ZHONG Y, SAKAGUCHI T, YIN F.Effects of transformation twin on Hall-Petch relationship in Mn-Cu alloy[J]. Materials science & Engineering A, 2008, 492(1/2): 419-427.
[11] 蔡曙光, 王明杰. Fe-16Mn-3.5C-3Si-3Cu高锰TWIP合金铸铁的处理金相组织分析[J]. 福建工程学院学报, 2016, 14(1): 32-35.
CAI Shuguang, WANG Mingjie.Microstructure analysis of heat treatment of Fe-16Mn-3.5C-3Si-3Cu high-manganese TWIP alloy cast iron[J]. Journal of Fujian University of Engineering, 2016, 14(1): 32-35.
[12] 陈琳, 彭文屹, 邓翠贞, 等. Cu、Fe对高锰MnNi合金阻尼性能的影响[J]. 热加工工艺, 2016, 45(4): 1-5.
CHEN Lin, PENG Wenyi, DENG Cuizhen, et al.Effects of Cu and Fe on damping properties of high MnNi alloy[J]. Hot Processing Technology, 2016, 45(4): 1-5.