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| 摘要: |
| 通过对察铬硼钨钒系铁基堆焊合金在室温和高温时的金相组织，碳化物形态，组成及分布情况，证明了堆焊层中加入 铬，硼，钒、钨等元素，能够形成（ＣｒＦｅ）７Ｃ３、ＶＣ、ＷＣ等硬质相，提出了堆焊层的常温及高温抗磨能力。但堆焊层中的碳化物（ＣｒＦｅ）７Ｃ３会随着温度的升高，有部分溶解，同时基体中析出Ｃｒ２３Ｃ６和其它碳物共同提高堆焊层的高温耐磨性。这正是该合金高温抗磨比较高的主要原因。 |
| 关键词: 等离子堆焊 高温耐磨性 碳化物 堆焊 磨损 |
| DOI： |
| 分类号:TG455 |
| 基金项目: |
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| Study on Wear Mechanism of Cr-B-W-V Fe-Base PTA Surface Alloy at High Temperature |
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Ji Jie Zhang Wenyue Liu Zhengjun Zhang Shusheng
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| Abstract: |
| By means of observing the metallographic microstructure, morphology, composition and distribution state of Cr-B-W-V Fe-base surface alloy at atmospheric and high temperature, it is proved that addition of alloying elements Cr, B, V and W in surface layers can form hard phases (Cr.Fe)_7C_3 in surface layer can be partly solved with the rise of temperature. Meanwhile,Cr_(23)C_6 can be also separated from the matrix,which may raise the wear-resistance of surface layer at high temperature together with other carbides. All above is just the main reason why the alloy shows comparatively high wear-resistance at high temperature. |
| Key words: plasma bard facing, wear-resistance at high temperature, carbides, |
