周海萍,王中伟,张弘斌,秦升学,刘杰,韩志豪,王晓广

• 1:山东科技大学机械电子工程学院

摘要(Abstract)：

采用光学显微镜、电子背散射衍射技术、透射电镜和电化学测试等研究了热处理对选择性激光熔化(SLM)制备的Corrax (CX)不锈钢微观组织和腐蚀行为的影响。首先对SLM CX不锈钢进行了900℃固溶处理1 h,随后在不同温度(430～630℃)下时效处理3 h。结果表明，热处理后SLM CX试样的相对密度达到99%以上，具有较好的致密化效果。电化学测试结果表明，时效温度的选择对SLM CX试样的耐腐蚀性影响较大，试样表面的腐蚀痕迹得到一定程度的改善。530℃时效试样的相对密度最大(99.72%),耐蚀性最好，腐蚀电位最高(-0.1851±0.013 V),腐蚀电流密度最小(0.1203±0.011μA·cm~(-2))。热处理后SLM CX试样的耐蚀性受相对密度、晶粒尺寸、晶界特征分布以及NiAl颗粒沉淀析出的协同影响。

关键词(KeyWords)： 选择性激光熔化;Corrax (CX)不锈钢;热处理;腐蚀行为;显微组织

Abstract:

Keywords:

基金项目(Foundation): 山东省自然科学基金面上项目(ZR2021ME234)

作者(Author): 周海萍,王中伟,张弘斌,秦升学,刘杰,韩志豪,王晓广

参考文献(References)：

• [1] 段智为，满成，崔中雨，等.热处理对SLM-316L不锈钢组织结构及钝化行为的影响机制[J].工程科学学报，2023,45(4):560-568.DUAN Zhi-wei,MAN Cheng,CUI Zhong-yu,et al.Effect mechanism of heat treatment on microstructure and passivation behavior of SLM-316L stainless steel[J].Journal of Engineering Science,2023,45(4):560-568.
• [2] 李峰.热处理工艺对SLM15-5PH不锈钢力学性能和腐蚀性能的影响研究[J].山西冶金，2022(5):59-61.LI Feng.Effect of heat treatment on mechanical properties and corrosion properties of SLM15-5PH stainless steel[J].Shanxi Metallurgy,2022(5):59-61.
• [3] 秦奉，施麒，刘辛，等.热处理对选区激光熔化17-4PH不锈钢力学性能的影响[J].材料研究学报，2021,35(8):606-614.QIN Feng,SHI Qi,LIU Xin,et al.Effect of heat treatment on mechanical properties of 17-4PH stainless steel by selective laser melting[J].Journal of Materials Research,2021,35(8):606-614.
• [4] Ji C,Li K,Zhan J B,et al.The effects and utility of homogenization and thermodynamic modeling on microstructure and mechanical properties of SS316/IN718 functionally graded materials fabricated by laser-based directed energy deposition[J].Journal of Materials Processing Technology,2023,26(8):319-326.
• [5] Li K,Yang T,Gong N,et al.Additive manufacturing of ultra-high strength steels:A review[J].Journal of Alloys and Compounds,2023,37(6):965-973.
• [6] Chen J,Li K,Gong N,et al.A critical review on wire-arc directed energy deposition of high-performance steels[J].Journal of Materials Research and Technology,2023,319:118084.
• [7] 张慧妍，刘延辉.采用选区激光熔化技术制造的316L不锈钢的微观组织和耐蚀性能[J].热处理，2021,36(5):18-22.ZHANG Hui-yan,LIU Yan-hui.Microstructure and corrosion resistance of 316L stainless steel fabricated by selective laser melting[J].Heat Treatment,2021,36(5):18-22.
• [8] 徐凯池，王科，徐如雪，等.激光选区熔化成型316L不锈钢工艺参数研究[J].航空发动机，2022,48(1):110-115.XU Kai-chi,WANG Ke,XU Ru-xue,et al.Study on process parameters of laser selective melting forming of 316L stainless steel[J].Aerospace Engines,2022,48(1):110-115.
• [9] Cheng C,Yan X C,Rodolphe B,et al.Influence of post-heat treatments on the mechanical properties of CX stainless steel fabricated by selective laser melting[J].Journal of Materials Science,2020,55:8303-8316.
• [10] Sanjari M,Hadadzadeh A,Pirgazi H,et al.Selective laser melted stainless steel CX:Role of built orientation on microstructure and micro-mechanical properties[J].Materials Science and Engineering A,2020,786:139365.
• [11] Hadadzadeh A,Shahriari A,Amirkhiz B S,et al.Additive manufacturing of an Fe-Cr-Ni-Al maraging stainless steel:Microstructure evolution,heat treatment,and strengthening mechanisms[J].Materials Science and Engineering A,2020,787:139470.
• [12] Dong D,Chang C,Wang H,et al.Selective laser melting (SLM) of CX stainless steel:Theoretical calculation,process optimization and strengthening mechanism[J].Materials Science and Technology,2021,73:151-164.
• [13] Asgari H,Mohammadi M.Microstructure and mechanical properties of stainless steel CX manufactured by Direct Metal Laser Sintering[J].Materials Science and Engineering A,2018,709:82-89.
• [14] Yan X C,Chen C Y,Chang C.Study of the microstructure and mechanical performance of C-X stainless steel processed by selective laser melting (SLM)[J].Materials Science and Engineering,2020,781:139227.
• [15] Shahriari A,Khaksar L,Nasiri A,et al.Microstructure and corrosion behavior of a novel additively manufactured maraging stainless steel[J].Electrochimica Acta,2020,339:135925.
• [16] Brandon D G.The structure of high-angle grain boundaries[J].Acta Metallurgica,1966,14(11):1479-1484.
• [17] Zhang J,Wang M,Niu L,et al.Effect of process parameters and heat treatment on the properties of stainless steel CX fabricated by selective laser melting[J].Journal of Alloys and Compounds,2021,877:160062.
• [18] Shahriari A,Ghaffair M,Khaksar L,et al.Corrosion resistance of 13wt.% Cr martensitic stainless steels:Additively manufactured CX versus wrought Ni-containing AISI 420[J].Corrosion Science,2021,184:109362.
• [19] Yin S,Chen C,Yan X,et al.The influence of aging temperature and aging time on the mechanical and tribological properties of selective laser melted maraging 18Ni-300 steel[J].Additive Manufacturing,2018,22:592-600.
• [20] Gu D,Zhang H,Dai D,et al.Anisotropic corrosion behavior of Sc and Zr modified Al-Mg alloy produced by selective laser melting[J].Corrosion Science,2020,170:108657.
• [21] Liang Z X,Ye B,Zhang L,et al.A new high-strength and corrosion-resistant Al-Si based casting alloy[J].Materials Letters,2013,97:104-117.
• [22] Afkhami S,Javaheri V,Dabiri E,et al.Effects of manufacturing parameters,heat treatment,and machining on the physical and mechanical properties of 13Cr10Ni1.7Mo2Al0.4Mn0.4Si steel processed by laser powder bed fusion[J].Materials Science and Engineering A,2022,832:142402.
• [23] 王飞云，金建军.热处理温度对新型马氏体时效不锈钢微观组织和性能的影响[J].材料工程，2019,47:152-160.WANG Fei-yun,JIN Jian-jun.Effect of heat treatment temperature on microstructure and properties of new maraging stainless steel[J].Journal of Materials Engineering,2019,47:152-160.
• [24] 房蕊蕊.选区激光熔化工艺参数对CX不锈钢组织与性能的影响[D].青岛：山东科技大学，2021.FANG Rui-rui.Effect of selective laser melting process parameters on microstructure and properties of CX stainless steel[D].Qingdao:Shandong University of Science and Technology,2021.
• [25] Mao C,Liu C,Yu L,et al.Discontinuous lath martensite transformation and its relationship with annealing twin of parent austenite and cooling rate in low carbon RAFM steel[J].Materials & Design,2021,197:109252.
• [26] Bi J,Lei Z L,Chen Y B,et al.An additively manufactured Al-14.1Mg-0.47Si-0.31Sc-0.17Zr alloy with high specific strength,good thermal stability and excellent corrosion resistance[J].Journal of Materials Science and Technology,2021,67:23-35.
• [27] Ralston K D,Birbilis N,Davies C.Revealing the relationship between grain size and corrosion rate of metals[J].Scripta Materialia,2010,63(12):1201-1214.
• [28] Sun M,Xiao K,Dong C F,et al.Effect of stress on electrochemical characteristics of pre-cracked ultrahigh strength stainless steel in acid sodium sulphate solution[J].Corrosion Science,2014,89:137-145.
• [29] Man C,Dong C F,Liu T T,et al.The enhancement of microstructure on the passive and pitting behaviors of selective laser melting 316L SS in simulated body fluid[J].Applied Surface Science,2019,467-468:193-205.
• [30] Lu Z,Zhang C C,Deng N N,et al.Evolution of grain boundary character distribution in near-surface regions of a cold-rolled nickel-based superalloy during induction heating process[J].Journal of Materials Research and Technology,2021,15:801-809.

文章评论(Comment)：