王资兴,王磊,孙文儒

• 1:东北大学材料各向异性与织构教育部重点实验室
• 2:宝山钢铁股份有限公司研究院
• 3:中国科学院金属研究所

摘要(Abstract)：

以IN718合金ϕ508 mm真空自耗铸锭为研究对象,采用光学显微镜和扫描电镜等研究了低、中和高3种熔速下其低倍、高倍的组织特征。结果表明:不同熔速铸锭两侧枝晶生长方式基本相同,边缘均是细密的柱状枝晶;随着熔速升高熔池明显加深,铸锭两侧对称性变差,柱状晶生长方向与轴向的角度增大,铸锭中心部位组织由柱状晶向等轴晶转化;随熔速升高铸锭中心和R/2部位的二次枝晶间距略有增大,中心部位二次枝晶间距稍大于R/2部位;高熔速的中心和R/2部位二次枝晶干变得粗大,甚至出现互相熔合的现象;不同熔速对铸锭中Laves相析出数量影响不大;而在同一熔速下铸锭Laves相析出数量中心部位多于R/2部位,明显高于边缘部位。

关键词(KeyWords)： IN718合金;熔速;真空自耗重熔;铸锭组织

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(U1708253)

作者(Author): 王资兴,王磊,孙文儒

DOI: 10.13289/j.issn.1009-6264.2018-0393

参考文献(References)：

• [1] 王慧.金属材料冶炼工艺学[M].北京:冶金工艺出版社,1995.
• [2] 姜周华,董艳伍,李花兵,等.特殊钢特种冶金技术的新发展[J].中国冶金,2011,21(12):1-10.JIANG Zhou-hua,DONG Yan-wu,LI Hua-bing,et al.Development of special melting technology for special steel[J].China Metallurgy,2011,21(12):1-10.
• [3] 郭建亭.高温合金材料学(中册)—制备工艺[M].北京:科学出版社,2008.
• [4] 董建新.高温合金GH4738及应用[M].北京:冶金工艺出版社,2014.
• [5] Du J H,Lü X D,Deng Q,et al.Effect of solution treatment on the microstructure and mechanical properties of IN718 alloy[J].Rare Metal Materials and Engineering,2017,46(9):2359-2365.
• [6] Pollock T M,Tin S.Nickel-based superalloys for advanced turbine engines:chemistry,microstructure and properties[J].Journal of Propulsion and Power,2006,22(2):361-374.
• [7] Schwant R C,Thamboo S V,Anderson A F,et al.Large 718 forgings for land based turbines[C]//Superalloys 718,625,706 and Various Derivatives,Warrendale,1997:141-152.
• [8] 赵新宝,谷月峰,鲁金涛,等.GH4169 合金的研究新进展[J].稀有金属材料与工程,2015,44(3):768-774.ZHAO Xin-bao,GU Yue-feng,LU Jin-tao,et al.New research development of superalloy GH4169[J].Rare Metal Materials and Engineering,2015,44(3):768-774.
• [9] 赵立华,张艳姝,吴桂芳.GH4169 高温合金的静态再结晶动力学[J].材料热处理学报,2015,36(5):217-222.ZHAO Li-hua,ZHANG Yan-shu,WU Gui-fang.Static recrystallization dynamic behavior of GH4169 superalloy[J].Transactions of Materials and Heat Treatment,2015,36(5):217-222.
• [10] 仲增墉,庄景云.变形高温合金生产工艺中几个重要问题的研究和进展[J].钢铁研究学报,2003,15(7):1-9.ZHONG Zeng-yong,ZHUANG Jing-yun.Development of several important problems on producing technologies of wrought superalloy[J].Journal of Iron and Steel Research,2003,15(7):1-9.
• [11] Auburtin P,Wang T,Cockcroft S L,et al.Freckle formation and freckle criterion in superalloy castings[J].Metallurgical and Materials Transactions B,2000,31B(8):801-811.
• [12] Kermanpur A,Evans D G,Siddall R J,et al.Effect of process parameters on grain structure formation during VAR of INCONEL alloy 718[J].Journal of Materials Science,2004,39(24):7175-7182.
• [13] 朱鸣芳,邢丽科,方辉,等.合金凝固枝晶粗化的研究进展[J].金属学报,2018,54(5):789-800.ZHU Ming-fang,XING Li-ke,FANG Hui,et al.Progresses in dendrite coarsening during solidification of alloys[J].Acta Metallurgica Sinica,2018,54(5):789-800.
• [14] 翟慎秋,魏亚杰,吴德海.金属树枝晶的生长行为[J].山东工业大学学报,1997,27(2):181-187.ZHAI Shen-qiu,WEI Ya-jie,WU De-hai.Metal dendrite growth behavior[J].Journal of Shandong University of Technology,1997,27(2):181-187.
• [15] 庄景云,杜金辉,邓群,等.变形高温合金GH4169[M].北京:冶金工业出版社,2006.
• [16] 施琦,王磊,王杰.新型熔炼工艺下GH4169合金的凝固组织控制研究[J].材料科学与工艺,2015,23(5):65-70.SHI Qi,WANG Lei,WANG Jie.Microstructure control of GH4169 alloy during a new melting and solidification process[J].Materials Science and Technology,2015,23(5):65-70.Effect of melting rate on microstructure of IN718 alloy vacuum arc remelting ingot WANG Zi-xing, WANG Lei, SUN Wen-ru(91)Corrosion behavior of X80 pipeline steel with different microstructure under AC interference in alkaline soil environment ZHU Min, WANG Ya-ming, YUAN Yong-feng, YIN Si-min, GUO Shao-yi(98)

文章评论(Comment)：