ABSTRACT

Inconel 690TT has an excellent high-temperature corrosion resistance and has been widely applied in steam generators of pressurized water reactor (PWR) nuclear power plants. In this paper, Inconel 690TT was investigated in the rolling reduction (RR) of the ultrasonic surface rolling process of 0, 0.2, 0.4 and 0.6 mm, respectively. It was found that the specimens with RR of 0 mm were basically equal to the untreated specimens, while the specimens with RR of 0.2 mm were the smoothest and brightest. Some cracks appeared on the surface of specimens with RR of 0.4 and 0.6 mm. Compared with 0 mm, the hardness of specimens with RR of 0.2, 0.4 and 0.6 mm increased by 187.29%, 194.51% and 200.33%, respectively. The wear resistance of specimens with RR of 0.2 mm was improved, while the wear resistance of specimens with RR of 0.4 and 0.6 mm became worse. The corresponding corrosion resistance of specimens with RR of 0.2, 0.4 and 0.6 mm was better than that of 0 mm; meanwhile, the specimen with 0.2 mm RR showed the best influence on improving the surface corrosion performance.

摘要

Inconel 690TT具有优异的耐高温腐蚀性能，已广泛应用于压水堆（PWR）核电站蒸汽发生器。在本文中，Inconel 690TT 分别在 0、0.2、0.4 和 0.6 mm 的超声波表面滚压工艺的滚压率 (RR) 中进行了研究。发现RR为0 mm的试样与未处理的试样基本相等，而RR为0.2 mm的试样最光滑、最亮。RR 分别为 0.4 和 0.6 mm 的试样表面出现一些裂纹。与0 mm相比，RR为0.2、0.4和0.6 mm的试样硬度分别提高了187.29%、194.51%和200.33%。RR为0.2 mm试样的耐磨性提高，而RR为0.4和0.6 mm试样的耐磨性变差。RR分别为0.2、0.4和0.6mm的试样相应的耐腐蚀性能优于0mm的试样；同时，0.2 mm RR 的试样对改善表面腐蚀性能的影响最好。