| 原位复合(Nb-Cr-Ti)C堆焊金属的组织与性能 |
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| 引用本文： | 汤文博,郭云刚,魏建军,黄智泉. 原位复合(Nb-Cr-Ti)C堆焊金属的组织与性能[J]. 材料保护, 2009, 42(10) |
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| 作者姓名： | 汤文博 郭云刚 魏建军 黄智泉 |
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| 作者单位： | 郑州大学材料科学与工程学院,河南,郑州,450001;郑州机械研究所,河南,郑州,450001 |
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| 摘 要： | 工业机械设备表层磨损失效非常普遍,堆焊是其最有效的保护方法之一.采用自制焊条,通过对堆焊合金的组织结构设计和成分调整,自行设计了Nb-Cr-Ti系堆焊金属,并堆焊出了耐磨抗裂的合金层.采用光学显微镜、扫描电镜、能谱分析仪器以及磨损试验机等,分析了堆焊层组织结构和性能,探讨了各合金元素在堆焊层中的作用.结果表明:堆焊层组织为混合型马氏体和少量残余奥氏体+弥散分布的复合(Nb-Cr-Ti)C颗粒,低碳马氏体和高碳马氏体数量相当.铌在高温下先析出生成硬质相NbC,碳化物硬质点呈颗粒状弥散分布,使组织细化,也使焊层达到较高的硬度,提高了耐磨性.碳化物的大量弥散析出,使得基相含碳量较低而转变成低碳马氏体,因基相有较高的塑韧性,抗裂性增强.该堆焊层的耐磨性和抗裂性明显优于商用D667焊条.
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| 关 键 词： | 堆焊 Nb-Cr-Ti 显微组织 抗裂性 耐磨性 Q235钢 |
Microstructure and Properties of In-Situ Synthesized Nb-Cr-Ti/C Surfacing Welded Metal |
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| TANG Wen-bo,GUO Yun-gang,WEI Jian-jun,HUANGZhi-quan .. Microstructure and Properties of In-Situ Synthesized Nb-Cr-Ti/C Surfacing Welded Metal[J]. Journal of Materials Protection, 2009, 42(10) |
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| Authors: | TANG Wen-bo GUO Yun-gang WEI Jian-jun HUANGZhi-quan . |
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| Affiliation: | TANG Wen-bo1,GUO Yun-gang1,WEI Jian-jun2,HUANGZhi-quan2 ( 1.School of Material Science , Engineering,Zhengzhou University,Zhengzhou 450001,China,2.ZhengzhouResearch Institute of Mechanical Engineering,Zhengzhou450001,China). |
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| Abstract: | The worn and failed surface of workpieces made of 0235 steel can be effectively rebuilt bv hardfacing.Thus wear- and crack-resistant Nb-Cr-Ti/C surfacing welded coating was prepared on the surface of the steel by using the welding rods and by conducting design of microstructure and manipulation of composition.The microstruerure and properties of Nb-Cr-Ti hardfacing coating were analyzed bv means of optical microscopy, scanning electron microscopy, energy dispersive spectrometry, and dry sand abrasion test.A... |
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| Keywords: | Nb-Cr-Ti |
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