Effect of oxidation time on evaluation of austenite grain size of low alloy spring steel

doi:10.13251/j.issn.0254-6051.2021.08.046

Abstract

Abstract: Oxidation method can be used to determine the grain size of steel. The effect of oxidation time on the evaluation of the austenite grain size of spring steel 50CrV was studied. It was found that the oxidation process can be divided into three stages. In the first stage, the excess ferrite phase is continuously transformed into austenite. In the second stage, the diffusion of anions and cations between the substrate and the oxide film is accelerated again, and the underlying metal substrate continues to oxidize and decarburize, and part of the austenite grain boundary on the surface of specimen is replaced. In the third stage, the austenite grains in the first and second stages gradually grow, and the old and new oxide films are superimposed to grow, which are verified in 55SiCr, 60Si2Mn and 65Si2CrV steels. Without affecting the accuracy of the test results, the oxidation time can be shortened from the standard 60 min to about half, and then the grain size can be obtained by modification, which is close to 11.00 grade of direct corrosion method and 11.09 grade of hydrogen induced intergranular fracture.

Key words: oxidation method, grain size, spring steel, oxidation process

CLC Number:

TG142.25

Chen Jiping, Zhang Le, Xing Xianqiang, Sun Guoqing, Qian Jianqing. Effect of oxidation time on evaluation of austenite grain size of low alloy spring steel[J]. Heat Treatment of Metals, 2021, 46(8): 241-245.

References

[1]柳文波. 0Cr13Ni5Mo马氏体钢晶粒细化的研究[D]. 北京: 清华大学, 2009.
Liu Wenbo. Grain refinement study on 0Cr13Ni5Mo martensitic steel[D]. Beijing: Tsinghua University, 2009.
[2]刘天佑. 氧化法检验钢的奥氏体晶粒度的研究[J]. 理化检验(物理分册), 2000, 38(11): 501-504.
Liu Tianyou. Study on the austenite grain size inspection of steel by oxidation method[J]. Physical Testing and Chemical Analysis Part Physics, 2000, 38 (11): 501-504.
[3]刘文月, 任毅, 王爽, 等. 钢中奥氏体晶粒长大规律[J]. 上海金属, 2019, 41(4): 88-93.
Liu Wenyue, Ren Yi, Wang Shuang, et al. Austenite grain growth law in steel[J]. Shanghai Metal, 2019, 41(4): 88-93.
[4]李月云, 胡磊, 王雷, 等. SWRS87B-T高碳钢奥氏体晶粒长大规律的研究[J]. 热加工工艺, 2018, 47(24): 167-171.
Li Yueyun, Hu Lei, Wang Lei, et al. Research on the austenite grain growth law of SWRS87B-T high carbon steel[J]. Hot Working Technology, 2018, 47(24): 167-171.
[5]孔祥伟. 快速热处理马氏体钢微观组织及其性能的研究[D]. 沈阳: 东北大学, 2014.
Kong Xiangwei. Study on rapid heat treatment microstructure and mechanical properties of martensite high strength steel[D]. Shenyang: Northeastern University, 2014.
[6]汪炳叔, 辛仁龙, 黄光杰, 等. EBSD分析技术在镁合金晶粒尺寸表征中的应[J]. 电子显微学报, 2009, 28(1): 20-22.
Wang Bingshu, Xin Renlong, Huang Guangjie, et al. Application of EBSD analysis technique in the characterization of magnesium alloy grain size[J]. Journal of Chinese Electron Microscopy Society, 2009, 28(1): 20-22.
[7]肖玄, 陈敏. SWRH72A帘线钢盘条晶粒度测试方法[J]. 金属热处理, 2016, 41(4): 201-204.
Xiao Xuan, Chen Min. Test method for grain size of SWRH72A cord steel wire rod[J]. Heat Treatment of Metals, 2016, 41(4): 201-204.
[8]刘建华, 邵光杰, 窦连福. 用氧化法显示高碳钢奥氏体的晶粒度[J]. 理化检验(物理分册), 1995, 33(5): 56.
Liu Jianhua, Shao Guangjie, Dou Lianfu. Displaying the grain size of austenite of high carbon steel by oxidation method[J]. Physical Testing and Chemical Analysis Part (Physics), 1995, 33(5): 56.
[9]陈杰, 李文军, 刘新宽, 等. 中高碳钢晶粒度测定方法研究[J]. 金属热处理, 2019, 44(1): 219-222.
Chen Jie, Li Wenjun, Liu Xinkuan, et al. Study on the method of measuring grain size of medium and high carbon steel[J]. Heat Treatment of Metals, 2019, 44(1): 219-222.
[10]张新, 杨清毅. 光学显微镜和EBSD分析技术对晶粒度评定的对比[J]. 现代冶金, 2010, 38(1): 32-34.
Zhang Xin, Yang Qingyi. Comparison of the evaluation of grain size by optical microscope and EBSD analysis technology[J]. Modern Metallurgy, 2010, 38(1): 32-34.
[11]张钧. 连铸945钢CCT曲线的测定及其应用[D]. 哈尔滨: 哈尔滨工程大学, 2002.
Zhang Jun. Continuous-cooling transformation diagrams for continuous casting 945 steel and its application[D]. Harbin: Harbin Engineering University, 2002.

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