【摘要】 用SSRT方法研究秦山PWR核电站主管道焊接的316不锈钢和蒸汽发生器传热管Incoloy-800合金的应力腐蚀破裂行为,应变速率均为4.2×10^-6/s。316SS的试验温度为315℃,介质为模拟离子交换树脂热分解产物的酸性硫酸盐溶液(几个ppm至1000ppmSO₄^2-);Incoloy-800的试验温度为270℃,介质为模拟离子交换树脂的热分解产物的酸性硫酸盐溶液(几个ppm至1000ppm SO₄^2-)以及硫酸盐和氯化物组合的溶液(1000ppm SO₄^2-,2～1000ppm Cl^-)。结果表明,316SS在上述介质中对穿晶应力腐蚀破裂敏感,Incoloy-800合金在上述介质中对应力腐蚀破裂不敏感。更多还原

【Abstract】 The stress corrosion cracking (SCC) susceptibility of 316 stainless steel (SS) which was welded for primary pipe and Incoloy-800 (shotpeening) for steam generator (SG) tube have been investigated by a slow stain rate test (SS-RT) at a strain rate of 4. 2X 10-6/s. Tests were conducted at 315C for 316 SS and 270"C for In-800 in the oxygenated simulated resin intrusion environment 24 (acidic sulfate). Tests of the effect of combination of SO42- and Cl- on SCC of Incoloy-800 were also carried out. The results indicate that Incoloy-800 is unsusceptible to SCC either in the environment with SO42- (from a few ppm to 1000 ppm, pH 3-4) or in the environment of combination of SO42- (1000 ppm) and Cl- (from 2 to 1000 ppm). The 316 NG SS is susceptible to transgranular stress corrosion cracking (TGSCC) in the resin intrusion environment with SO42-in high temperature water.更多还原