| 热处理工艺对离心铸造高铬铸铁轧辊组织及硬度的影响 |
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| 引用本文： | 曹宇,宋新莉,郑爱琴,陈荣东,贾涓,毕云杰. 热处理工艺对离心铸造高铬铸铁轧辊组织及硬度的影响[J]. 金属热处理, 2020, 45(2): 108-113. DOI: 10.13251/j.issn.0254-6051.2020.02.021 |
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| 作者姓名： | 曹宇 宋新莉 郑爱琴 陈荣东 贾涓 毕云杰 |
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| 作者单位： | 武汉科技大学耐火材料与冶金国家重点实验室, 武汉 湖北 430081 |
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| 摘 要： | 采用了光学显微镜、扫描电镜、X射线衍射仪、洛氏硬度计等仪器,研究了离心铸造高铬铸铁轧辊铸态及淬火与回火后的显微组织结构、碳化物和硬度等。结果表明:高铬铸铁轧铸态组织主要是由奥氏体+少量马氏体+(Cr,Fe)7C3碳化物组成,碳化物呈粗大板条状或块状,不同温度热处理后,得到回火马氏体+(Cr,Fe)7C3+Cr7C3碳化物的组织,组织中粗大板条状碳化物消失,得到细小块状或椭圆状碳化物。该高铬铸铁轧辊铸态硬度为56.0HRC左右,在950℃淬火及400℃回火处理后硬度增加到了约65.5HRC。
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| 关 键 词： | 高铬铸铁轧辊 热处理 碳化物 硬度 |
| 收稿时间： | 2019-08-20 |
Effect of heat treatment process on microstructure and hardness of high chromium cast iron roller produced by centrifuge casting |
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| Cao Yu,Song Xinli,Zhen Aiqin,Chen Rongdong,Jia Juan,Bi Yunjie. Effect of heat treatment process on microstructure and hardness of high chromium cast iron roller produced by centrifuge casting[J]. Heat Treatment of Metals, 2020, 45(2): 108-113. DOI: 10.13251/j.issn.0254-6051.2020.02.021 |
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| Authors: | Cao Yu Song Xinli Zhen Aiqin Chen Rongdong Jia Juan Bi Yunjie |
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| Affiliation: | State Key Laboratory of Refractory Materials and Metallurgy, Wuhan University of Science and Technology, Wuhan Hubei 430081, China |
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| Abstract: | Microstructure,carbides and hardness of high chromium cast iron roller as-cast by centrifuge casting and quenched and tempered were studied by optical microscope,scanning electron microscope,X-ray diffractometer and Rockwell hardness tester. The results show that the microstructure of the roller as cast is mainly composed of austenite and a few martensite and coarse plate or blocky( Cr,Fe)7C3 carbide.After heat treatment at different temperatures,tempered martensite and( Cr,Fe)7C3 and Cr7C3 carbides are obtained,and the plate-like carbides are replaced by fine block or elliptical ones. The hardness of the as-cast high chromium roller is 56. 0 HRC,then increases to about 65. 5 HRC after 950 ℃ quenching + 400 ℃ tempering. |
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| Keywords: | high chromium cast iron roller heat treatment carbide hardness |
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