渐变式电压、电流电渣重熔工艺分析

doi:10.13228/j.boyuan.issn1006-9356.20190487

摘要
图/表
参考文献
相关文章 (15)

全文: PDF (16282 KB) HTML (0 KB)
输出: BibTeX | EndNote (RIS)

摘要为了研究渐变式电压、电流电渣重熔工艺对铸锭组织性能的影响,以45号钢为试验原料,采用低倍腐蚀、光学显微镜(OM)、扫描电子显微镜(SEM)、拉伸力学试验等手段,对比了传统电渣工艺与参数渐变工艺对铸锭凝固组织及性能的差异。结果发现,重熔阶段先逐步降低过程电压,待电压降到一定值后,再逐步降低电流,直至结束熔炼,可以减小铸锭柱状晶组织与铸锭轴线的夹角,使铸锭组织倾向于定向凝固,提高铸锭轴线方向的抗拉强度。此外,通过该工艺获得的凝固组织中铁素体量降低,珠光体中层片结构得到明显细化。

	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
	作者相关文章
	于文涛
	卢华兴
	张雅文
	边卓伟
	徐猛
	杨万强

关键词 ：定向凝固, 电渣重熔, 凝固组织, 珠光体

Abstract：In order to study the influence of gradual voltage and current electroslag remelting(ESR) process on the structure and properties of ingots, No.45 steel was used as the experimental material to obtain the differences of solidification structure and properties on the traditional ESR process and parameter gradual changing process. The samples were analyzed by means of low power corrosion, optical microscope(OM), scanning electron microscope(SEM) and tensile mechanics test. It was found that the voltage was gradually reduced to a certain value and then the current was gradually reduced until the melting was finished. This process can reduce the angle between the ingot columnar crystal structure and the axis of the ingot, make the solidification structure be more inclined to directional solidification structure and improve the tensile strength of ingot in the axial direction. In addition, the amount of ferrite in the solidification structure decreased and the structure of pearlite middle lamellae was refined obviously.

Key words： directional solidification electroslag remelting solidification structure pearlite

收稿日期: 2019-10-16

作者简介: 于文涛(1982—), 男, 博士, 高级工程师; E-mailywt82@163.cm;

引用本文:

于文涛, 卢华兴, 张雅文, 边卓伟, 徐猛, 杨万强. 渐变式电压、电流电渣重熔工艺分析[J]. 中国冶金, 2020, 30(4): 46-50. YU Wen-tao, LU Hua-xing, ZHANG Ya-wen, BIAN Zhuo-wei, XU Meng, YANG Wan-qiang. Study on gradual voltage and current electroslag remelting process[J]. China Metallurgy, 2020, 30(4): 46-50.

链接本文:

http://www.zgyj.ac.cn/CN/10.13228/j.boyuan.issn1006-9356.20190487 或 http://www.zgyj.ac.cn/CN/Y2020/V30/I4/46

[1]	李正邦. 21世纪电渣冶金的展望[J]. 炼钢, 2003,19(2):6.
[2]	陈希春, 冯涤, 傅杰, 等. 电渣冶金的最新进展[J]. 钢铁研究学报, 2003, 15(2):62.
[3]	董艳伍, 姜周华, 李正邦. 具有发展潜力的电渣冶金技术[J]. 中国冶金, 2009, 19(4):1.
[4]	梁强, 陈希春, 付锐,等. 电流对GH4169合金电渣重熔过程影响的数值模拟研究[J]. 铸造技术, 2011, 32(9):1252.
[5]	邓玉坤,陈景榕,王世章. 高速工具钢[M]. 北京:冶金工业出版社,2002.
[6]	张光明, 马德新. 高温合金定向凝固技术研究历程及展望[J]. 铸造技术, 2013(7):866.
[7]	刘林, 张军, 沈军, 等. 高温合金定向凝固技术研究进展[J]. 中国材料进展, 2010(7):1.
[8]	Ma D, Grafe U. Microsegregation in directionally solidified dendritic-cellular structure of superalloy CMSX-4[J]. Materials Science and Engineering A (Structural Materials, Properties, Microstructure and Processing), 1999, 270(2):339.
[9]	Zhou Y Z, Volek A. Effect of dendrite arm spacing on castability of a directionally solidified nickel alloy[J]. Scripta Materialia, 2007, 56(6):537.
[10]	YU W T, LI J, SHI C B, et al. Effect of electroslag remelting parameters on primary carbides in stainless steel 8Cr13MoV[J]. Materials Transactions, 2016(57):1547.
[11]	陈希春, 付锐, 任昊, 等. 电渣重熔连续定向凝固FGH96合金非金属夹杂物研究[J]. 中国新技术新产品, 2011(10):1.
[12]	占礼春, 迟宏宵, 马党参, 等. 电渣重熔连续定向凝固M2高速钢铸态组织的研究[J]. 材料工程, 2013, 24(7):29.
[13]	姜周华,董艳伍,耿鑫,等.电渣冶金学[M].北京: 科学出版社, 2015.
[14]	余永宁. 金属学原理[M]. 北京:冶金工业出版社, 2013.
[15]	YU W T, LI J, SHI C B, et al. Effect of spheroidizing annealing on microstructure and mechanical properties of high-carbon martensitic stainless steel 8Cr13MoV[J]. Journal of Materials Engineering and Performance, 2016, 26(2):1.