顾建,符寒光,雷永平

• 1:北京工业大学材料科学与工程学院

摘要(Abstract)：

利用光学显微镜(OM)、扫描电镜(SEM)、X射线衍射(XRD)等分析手段,观察含硼中碳高铬铸铁在铸态和不同回火温度下的显微组织,并使用洛氏硬度和维氏硬度计测试硬度,研究了含硼中碳高铬铸铁在铸态和不同回火温度下组织和硬度的变化规律。结果表明:含硼中碳高铬铸铁铸态组织由奥氏体、马氏体和M7C3(M=Cr、Fe)组成。经回火处理后,基体中奥氏体数量减少,析出二次碳化物并转变成马氏体。经530℃+500℃二次回火后,洛氏硬度和显微硬度值分别为57.4 HRC和596.7 HV,以显微组织和硬度为评价标准时,此为实验条件下最优。

关键词(KeyWords)： 中碳高铬铸铁;回火处理;显微组织;硬度

Abstract:

Keywords:

基金项目(Foundation): 北京工业大学研究生科技基金(ykj-2012-7558);; 国家自然科学基金(51274016)

作者(Author): 顾建,符寒光,雷永平

DOI: 10.13289/j.issn.1009-6264.2013.09.023

参考文献(References)：

• [1]Wiengmoon A,Chairuangsri T,Brown A,et al.Microstructural and crystallographical study of carbides in 30wt%Cr cast irons[J].Acta Materialia,2005,53(15):4143-4154.
• [2]HOU Qing-yu,HUANG Zhen-yi,WANG Jing-tao.Application of rietveld refinenment to investigate the high chromium white cast iron austempered at different temperatures[J].Journal of Iron and Steel Research,International,2009,16(4):33-38.
• [3]Wiengmoon A,Pearce J T H,Chairuangsri T.Relationship between microstructure,hardness and corrosion resistance in 20 wt.%Cr,27wt.%Cr and 36wt.%Cr high chromium cast irons[J].Materials Chemistry and Physics,2011,125(3):739-748.
• [4]Tang X H,Chung R,Pang C J,et al.Microstructure of high(45wt%)chromium cast irons and their resistances to wear and corrosion[J].Wear,2011,271(9-10):1426-1431.
• [5]Wiengmoon A,Chairuangsrt T,Pearce J T H.A microstructural study of destabilized 30wt%Cr-2.3wt%C high chromium cast iron[J].ISIJ International,2004,44(2):396-403.
• [6]黄四亮.高铬白口铸铁(10%~28%)热处理工艺研究与探讨[J].铸造技术,2000,21(6):43-45.HUANG Si-liang.Study&discussion on the heat treatment of 10%~28%Cr white cast iron[J].Foundry Technology,2000,21(6):43-45.
• [7]孙志平,沈保罗,高升吉,等.亚临界热处理对高铬白口铸铁组织和耐磨性的影响[J].材料热处理学报,2003,24(3):54-57.SUN Zhi-Ping,SHEN Bao-Luo,GAO Sheng-Ji,et al.Effect of subcritical treatment on microstructure and wear resistance of a high chrome white cast iron[J].Transactions of Materials and Heat Treatment,2003,24(3):54-57.
• [8]Albertin E,Beneduce F,Matsumoto M,et al.Optimizing heat treatment and wear resistance of high chromium cast irons using computational thermodynamics[J].Wear,2011,271(9-10):1813-1818.
• [9]Pearce J T H.High chromium cast irons to resist abrasive wear[J].Foundryman,2002,95(4):156-166.
• [10]袁子洲,匡毅,于金峰.回火温度对KmTBCr26高铬铸铁组织和力学性能的影响[J].铸造,2004,53(10):788-791.YUAN Zi-zhou,KUANG Yi,YU Jin-feng.Effect of temper temperature on microstructure and Mechanical properties of KmTBCr26 high chromium cast iron[J].Foundry,2004,53(10):788-791.
• [11]Li Da,Liu Li-gang,Zhang Yun-kun,et al.Phase diagram calculation of high chromium cast irons and influence of its chemical composition[J].Materials and Design,2009,30(2):340-345.
• [12]Carpenter S D,Carpenter D,Pearce J T H.XRD and electron microscope study of an as-cast 26.6%chromium white iron microstructure[J].Materials Chemistry and Physicis,2004,85(1):32-40.

文章评论(Comment)：