本文選題：核電　切入點(diǎn)：鎳基合金焊絲　出處：《焊接》2017年02期

【摘要】：針對(duì)核電設(shè)備用690鎳基合金焊接材料依賴進(jìn)口的現(xiàn)狀,開展690鎳基合金焊接材料的國(guó)產(chǎn)化研制。研制的690鎳基合金氣體保護(hù)焊焊絲WHS690M滿足CAP1000及CAP1400核電站的要求,焊接工藝性良好,在不同焊接規(guī)范參數(shù)下,焊縫金屬室溫及高溫力學(xué)性能波動(dòng)較小,350℃抗拉強(qiáng)度≥485 MPa。對(duì)WHS690M及進(jìn)口Inconel 52M焊絲熔敷金屬進(jìn)行高溫失塑裂紋敏感性評(píng)估,并結(jié)合光學(xué)顯微鏡(OM)、掃描電子顯微鏡(SEM)及電子背散射衍射技術(shù)(EBSD),對(duì)晶粒取向和晶界特征進(jìn)行觀察。試驗(yàn)表明,焊縫金屬DDC最小臨界應(yīng)變出現(xiàn)在1 050℃附近,進(jìn)口Inconel 52M最小臨界應(yīng)變約為2.1%,WHS690M最小臨界應(yīng)變約為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，

本文編號(hào)：1720387