电焊机2025，Vol.55Issue(6)：1-9,9.DOI:10.7512/j.issn.1001-2303.2025.06.01
690合金UFP-TIG堆焊层在模拟压水堆一回路水中的应力腐蚀性能
SCC Performance of Inconel 690 Alloy UFP-TIG Cladding Layer in Simulated PWR Primary Water Environment
摘要
Abstract
Slow Strain Rate Tensile(SSRT),U-bend and Compact Tension(CT)tests were conducted to simulate the high-temperature and high-pressure water environment of a pressurized water reactor(PWR)nuclear power plant.The stress cor-rosion properties of the Inconel 690 alloy overlay welds fabricated using ultrasonic frequency pulsed square wave arc(UFP)tungsten inert gas(TIG)welding were evaluated and compared with those of constant direct current(DC)TIG welding over-lays.The results showed that neither the UFP nor the DC specimens exhibited signs of localized discontinuous brittle crack-ing in the SSRT tests.In the U-bend tests,two DC specimens exhibited cracks prior to immersion,and after immersion,these two specimens developed multiple cracks with lengths of 304 μm and 550 μm,respectively.The other DC specimen and all three UFP specimens showed no defects before immersion and remained smooth and intact without any signs of cor-rosion damage and defects after immersion.In the CT tests,the crack propagation rates varied with different sampling direc-tions and hydrogen contents.The average crack propagation rates for the DC and UFP specimens were(1.766-2.088)×10-3 mm/y and(2.372-2.889)×10-3 mm/y,respectively,corresponding to crack propagation lengths of 0.11-0.13 mm and 0.14-0.17)mm after 60 years of design life.Based on the comprehensive results of SCC initiation and propagation tests,it was concluded that the Inconel 690 alloy UFP-TIG overlay welds exhibits negligible SCC susceptibility in the simulated PWR primary water environment.关键词
超音频脉冲方波电弧/Inconel690合金/应力腐蚀/压水堆一回路水环境/慢应变速率拉伸试验/U型弯曲试验/紧凑拉伸试验Key words
ultra-high frequency pulsed square wave arc/Inconel 690 alloy/stress corrosion crack/PWR primary water envi-ronment/slow strain rate tensile test/U-bend test/compact tensile test分类
金属材料引用本文复制引用
陈忠兵,鲁立,齐铂金,从保强,祁泽武,尚建路,梁振新..690合金UFP-TIG堆焊层在模拟压水堆一回路水中的应力腐蚀性能[J].电焊机,2025,55(6):1-9,9.基金项目
国家自然科学基金资助项目(U20B2031) （U20B2031）
