| 激光熔敷钴基合金高温腐蚀的试验研究 |
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| 引用本文： | 张松,张春华,朱荆璞,吴维韬,王茂才. 激光熔敷钴基合金高温腐蚀的试验研究[J]. 沈阳工业大学学报, 1990, 0(1) |
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| 作者姓名： | 张松 张春华 朱荆璞 吴维韬 王茂才 |
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| 作者单位： | 沈阳工业大学金属材料工程系(张松，张春华，朱荆璞)，中科院金属腐蚀与防护研究所(吴维韬)，中科院金属腐蚀与防护研究所(王茂才) |
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| 摘 要： | 本文对以2Cr13不锈钢为基材,表面经激光熔敷钴基合金在高温PbSO_4盐中的热腐蚀行为和机制,进行了深入的研究探讨。试验结果表明,经激光熔敷钴基合金后,耐高温腐蚀性比原2Cr13钢提高2.5倍以上;耐磨性提高2倍以上。原因是获得细密枝晶+多元共晶组织,大量Co能促进Cr_2O_3、CoO.Cr_2O_3致密保护膜的形成,阻碍S的扩散,因而提高了耐高温腐蚀性能。腐蚀机制是沿晶腐蚀,硫化一氧化循环进行造成剥落型破坏腐蚀。
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| 关 键 词： | 激光加热 熔敷金属 钴基合金 高温 腐蚀 |
The Behavior of Corrosion of the laser Melted Co-Base Alloy Coating in the High Temperature Salt Bath |
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| Zhang Song,Zhang Chunhua Zhu Jingpu,. The Behavior of Corrosion of the laser Melted Co-Base Alloy Coating in the High Temperature Salt Bath[J]. Journal of Shenyang University of Technology, 1990, 0(1) |
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| Authors: | Zhang Song Zhang Chunhua Zhu Jingpu |
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| Abstract: | This paper deals with the high-temperature corrosion mechanism and behavior of the 2Crl3 stainless steel being melting-coated with Co-base alloy by laser. The result shows that there are fine dendrite and eutectic structures on the surface of specimen being melting-coated with Co-base alloy by laser. Co in high content can promote the formation of the fine Cr2O3, CoO.Cr2O3 films which obstruct the diffusion of S so that the high temperature corrosion resistance can be improved. Corrosion failure proceeds alone the grain boundaries so that the alternative sulphurating and oxygenating cause corrosion spalling. |
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| Keywords: | laser heating deposited metals Cobalt-base alloys high temperature corrosion |
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