| Cr22合金铸铁溜槽衬板的开发与试验研究 |
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| 引用本文： | 李固成. Cr22合金铸铁溜槽衬板的开发与试验研究[J]. 现代铸铁, 2014, 0(3): 48-51 |
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| 作者姓名： | 李固成 |
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| 作者单位： | 驻马店市永诚耐磨材料有限公司,河南驻马店463000 |
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| 摘 要： | 介绍了溜槽衬板的使用工况条件及技术要求,研究开发了新型Cr22MoWVTiNbRE钢铁高炉溜槽衬板,其化学成分为:w(C)2.6%~3.2%,w(Si)0.4%~0.8%,w(Mn)0.5%~1.0%,w(Cr)21.0%~23.0%,w(Mo)0.9%~1.1%,w(W)1.1%~1.8%,w(Cu)0.4%~0.6%,w(V)0.3%~0.5%,w(Ti)0.06%~0.2%,w(Nb)0.1%~0.5%,w(RE)0.04%~0.08%,w(S)≤0.06%,w(P)≤0.06%。热处理工艺为980~1050℃淬火+280~520℃回火,得到的硬度超过63.6HRC,冲击值超过24.66J/cm2;450~520℃二次回火,金相组织为回火马氏体+共晶碳化物(M7C3)+二次碳化物+少量残余奥氏体,得到的铸件硬度超过64HRC。
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| 关 键 词： | 高Cr铸铁 合金化 溜槽衬板 高硬韧性 |
Development and Experimental Research of Cr22 Alloy Cast Iron Chute Liner |
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| LI Gu-cheng. Development and Experimental Research of Cr22 Alloy Cast Iron Chute Liner[J]. Modern Cast Iron, 2014, 0(3): 48-51 |
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| Authors: | LI Gu-cheng |
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| Affiliation: | LI Gu-cheng (Zhumadian Yongcheng Wear-resistant Materials Co.,Ltd., Zhumadian 463000, China) |
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| Abstract: | The working conditions and technical requirements of chute liners were introduced. A new kind of chute liner made of Cr22MoWVTiNbRE was researched and developed. Its composition was w（C） 2.6%-3.2%,w（Si） 0.4%~0.8%,w（Mn） 0.5%~1.0%, w（Cr） 21.0%~23.0%,w（Mo） 0.9%-1.1%,w（W） 1.1%~1.8%,w（Cu） 0.4%--0.6%,w（V） 0.3%--0.5%,w（Ti） 0.06%~0.2%,w（Nb） 0.1% -0.5%,w（RE） 0.04%~0.08%,w（S）≤0.06%,w（P）≤0.06%. The heat treatment was quenching at 980~1 050 ℃ ,and tempering at 280-520℃. After heat treatment,the microstrueture hardness and impact value of the casting were above 63.6 HRC and 24.66 J/cm=,respectively. The microstructure after second tempering at 450~520 ℃ was tempered martensite, eutectic carbides （M7C3）, secondary carbides and small amount of residual austenite. Their hardness was above 64 HRC. |
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| Keywords: | high Cr cast iron alloying chute liners high hardness toughness |
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