核电设备用690镍基合金气体保护焊丝国产化研究

发布时间：2018-04-07 18:38

  本文选题：核电　切入点：镍基合金焊丝　出处：《焊接》2017年02期

【摘要】：针对核电设备用690镍基合金焊接材料依赖进口的现状,开展690镍基合金焊接材料的国产化研制。研制的690镍基合金气体保护焊焊丝WHS690M满足CAP1000及CAP1400核电站的要求,焊接工艺性良好,在不同焊接规范参数下,焊缝金属室温及高温力学性能波动较小,350℃抗拉强度≥485 MPa。对WHS690M及进口Inconel 52M焊丝熔敷金属进行高温失塑裂纹敏感性评估,并结合光学显微镜(OM)、扫描电子显微镜(SEM)及电子背散射衍射技术(EBSD),对晶粒取向和晶界特征进行观察。试验表明,焊缝金属DDC最小临界应变出现在1 050℃附近,进口Inconel 52M最小临界应变约为2.1%,WHS690M最小临界应变约为3.2%。
[Abstract]:In view of the current situation that 690 nickel base alloy welding materials for nuclear power equipment depend on import, the domestic development of 690 nickel base alloy welding materials is carried out.The WHS690M of the gas shielded welding wire developed for 690 nickel-base alloy meets the requirements of CAP1000 and CAP1400 nuclear power stations, and the welding process is good. Under different welding specifications, the mechanical properties of the weld metal at room temperature and high temperature have less fluctuation of tensile strength 鈮，

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