核阀零件激光熔覆工艺合理性研究

Study on Process of Laser Cladded Nuclear Valve Parts

采用激光熔覆、等离子喷焊和电弧堆焊3种工艺分别对核阀阀瓣密封面进行了Co基合金的强化处理 ,对所形成的熔层的组织和性能进行了试验分析 ,对3种工艺的综合成本进行了对比。结果表明 :激光熔覆工艺具有生产率高、能耗低、熔覆层加工余量小、成品率高以及综合成本低等特点 ;激光熔覆核阀零件的质量和使用寿命明显高于等离子喷焊和电弧堆焊处理的核阀零件。因此 。

The microstructure and performances of the Co base alloy coatings that are formed by laser cladding,plasma spurt welding and arc surfacing on the nuclear valve sealing surface have been studied and compared.The combination costs of laser cladding,plasma spurt welding and arc surfacing have been analyzed and compared.The results showed that the laser cladding processing has the advantages of high efficiency,low energy cost,a little machining allowance,high rate of finished products and low combination cost,compared with plasma spurt welding processing and arc surfacing processing.The laser cladding technology can improve the qualities of nuclear valve parts and increase their service life.Therefore,the laser cladding processing is a new technology with developing potential.