加工工艺对Zr-4合金管材腐蚀性能影响-中国材料进展

文章信息/Info

Title:: Influence of Processing Technology on Corrosion Performance of Zr-4 Alloy Pipe

Author(s):: XU Wenzheng; LUO Qianqian; LI Xiaoying; GAO Bo; State Nuclear Bao Ti Zirconium Industry Co., Ltd., Baoji 721013,China

摘要:: 采用Zr-4合金Φ63.5 mm×10.92 mm管坯，在不同轧制工艺下，即不同轧制Q值和累积退火参数下制备管材，对比了管材耐疖状腐蚀性能和长期耐均匀腐蚀性能，结果表明：累积退火参数在0.96×10-18~1.17×10-18 h时，第二相颗粒尺寸在70~90 nm的范围内，第二相颗粒尺寸随着累积退火参数降低而减小，可在一定程度上改善Zr-4合金管材耐疖状腐蚀性能；轧制中间道次Q值从0.687提升至1.0以上时，管材径向织构因子增大，耐疖状腐蚀性能显著提升；在上述工艺参数范围内，管材长期耐均匀腐蚀性能无明显变化。

Abstract:: In this paper, three kinds of pipes were processed from the Zr-4 alloy tube with size of Φ 63.5 mm×10.92 mm under different rolling process parameters, namely under different rolling Q values and cumulative annealing parameters, the nodular and long term uniform corrosion resistance were compared. The results show that, when cumulative annealing parameters are 0.96×10-18~1.17×10-18 h, the average sizes of the second phase particles of pipes are in the range of 70~90 nm，the size of the second phase particles becomes finer when cumulative annealing parameter decreases, the nodular corrosion resistance of Zr-4 alloy pipe is better. When the Q value of intermediate pass is increased from 0.687 to more than 1.0, the radial texture of pipe is enhanced, and the nodular corrosion resistance is significantly improved. Within the above parameter range, the long term uniform corrosion performance has no obvious change.