摘要
本文系统地研究了Zr-1Nb-0.01Cu合金加工工艺与腐蚀行为之间的关系。结果表明,合金中第二相粒子尺寸越小,耐腐蚀性能越好;中间/最终退火过程形成的βZr会降低合金的耐腐蚀性能;腐蚀产物氧化膜由柱状晶和等轴晶组成,致密的柱状晶氧化膜比例越高,合金的耐腐蚀性能越好;当退火温度低于610°C时,柱状晶和等轴晶结合较为致密,当温度高于610°C时,两者结合强度较弱,同时柱状晶内部容易出现裂纹;建议采取低温退火(最终退火温度≤460°C)工艺以提高合金的耐腐蚀性能。
The relationship between processing technologies and corrosion behavior was investigated systematically in Zr-1Nb-0.01 Cu alloy. The results show that the corrosion resistance properties can be improved by the small size of secondary phase particles（SPPs）. The properties would be decreased when βZr forms during intermediate/final annealing process. The oxide film contains columnar crystal and isometric crystal, and the corrosion resistance properties can be improved by high volume ratio of columnar crystal oxide film. When the anneal temperature is below 610°C, the bonding strength between columnar crystal and isometric crystal is high, it becomes weakness when the tenperature is above 610°C, and the cracks can be easily found in the crystal. Low temperature annealing temperature（≤460°C） is suggested in order to inprove corrosion resistence property of the alloy.
出处
《全面腐蚀控制》
2016年第1期78-82,共5页
Total Corrosion Control
