研究了在Nb，Ti，Zr；V和RE共存的高碳焊缝中碳化物和基体组织的特点及对韧性的影响结果表明，多元强碳化物元素与RE的综合作用，可诱使碳化物早期大量弥散析出，析出过程发生在焊缝凝固之前，同核心多维析出是碳化物由液相直接析出的主要机制；强碳化物元素与碳符合定比规律，可导致基体“贫碳”而转变为板条马氏体（M1）．最终获得以碳化物强化为主的高硬度兼高韧性焊缝
The feature of carbide and microstructure of matrix and their effect on toughness are studied in high carbon welds where Nb, Ti, V, Zr, RE coedest. Test results indicated that the synthetic effect of the multiple strong carbide elements and RE element leads to precipitate fine carbides before solidification of welds. The main mechanism of precipitating carbides from liquid phase is multiple direction precipitating at the same core. The contents of strong carbide elements and carbon element accorded with the fixed-ratio theorem, that made the matrix " carbon poor", and formed low carbon martensite. A weld with high hardness and good thoughness was achieved.
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| [3] | |
| [4] | |
| [5] | |
| [6] |
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