Study of cobalt-free, Fe-based alloy powder used for sealing surfaces of nuclear valves by laser cladding
Study of cobalt-free, Fe-based alloy powder used for sealing surfaces of nuclear valves by laser cladding
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激光熔覆核阀密封面用无钴铁基合金粉末的研究
DOI：
10.1016/j.nucengdes.2012.01.015
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发表时间：
2012-04-01
影响因子：
1.7
通讯作者：
Wei, Hongpu
中科院分区：
文献类型：
--
作者：
Shi, Shihong;Xu, Aiqin;Wei, Hongpu
为了避免钴基合金的活化辐射，开发了一种新型无钴铁基合金粉末（FeCr-1）。该粉末除主要成分为Fe外，还含有C、Ni、Cr、B、Si、W、V、Mo、Mn等。利用中空激光，成功在不锈钢表面制备了FeCr-1作为无钴强化层。研究表明，该激光熔覆涂层的显微硬度与钴基合金Stellite 6相当。XRD结果表明，涂层中存在Fe2SiV、Ni2Si和Si2.2Mn6等初生相以及Fe0.4Mn3.6C、Fe3C和Fe5C2等多种细小碳化物。分析表明，该合金具有耐磨性高、耐腐蚀性能好、耐高温等优点。无钴FeCr-1合金粉末的性能接近Stellite 6，因此可能成为新一代核电阀门堆焊的有前景的候选材料。 (C) 2012 Elsevier B.V. 保留所有权利。
To avoid the activated radiation of cobalt-based alloy, a new cobalt-free Fe-based alloy powder (FeCr-1) has been developed. In addition to the main constituent of Fe, this powder contains C, Ni, Cr, B. Si, W, V, Mo, Mn, etc. By using a hollow laser, FeCr-1 has been successfully prepared on the surface of stainless steel as the cobalt-free strengthening layer. Investigation reveals that the microhardness of this laser cladding coating corresponds to that of cobalt-based alloy Stellite 6. The XRD result reveals that the primary phases of, Fe2SiV, Ni2Si and Si2.2Mn6 as well as various fine carbides such as Fe0.4Mn3.6C, Fe3C and Fe5C2 exist in the coating. Analysis indicates that this kind of alloy has some advantages of high wear resistance, good corrosion resistance and high temperature tolerance. The capability of the Co-free FeCr-1 alloy powder is close to that of Stellite 6, thus it could be the promising candidate material of bead welding used for the new generation nuclear power valves. (C) 2012 Elsevier B.V. All rights reserved.