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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1000ppmSO_4~(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 SO_4~(2-))以及硫酸盐和氯化物组合的溶液(1000ppm SO_4~(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。
The SSRT method was used to study the stress corrosion cracking behavior of 316L stainless steel and Incoloy-800 heat-exchanger tube welded at the main pipe of Qinshan PWR nuclear power station with strain rates of 4.2 × 10 -6 / s. The test temperature of 316SS is 315 ℃. The medium is acidic sulfate solution (several ppm to 1000ppmSO_4 ~ (2 -)) simulating the thermal decomposition products of ion exchange resin. The test temperature of Incoloy-800 is 270 ℃. The medium is simulated ion exchange Sulfate solution (several ppm to 1000 ppm SO 4 2-) of the thermal decomposition product of the resin and a solution of sulfate and chloride (1000 ppm SO 4 2-, 2 to 1000 ppm Cl ~ -). The results show that 316SS is sensitive to transgranular stress corrosion cracking in the above medium, and Incoloy-800 alloy is not sensitive to stress corrosion cracking in the above medium.