700℃超超临界锅炉材料617B合金冷变形和退火过程中的组织演变

发布时间：2018-03-27 08:22

  本文选题：镍基高温合金　切入点：退火　出处：《中国有色金属学报》2017年07期

【摘要】：冷变形过程对617B合金管材的尺寸精度、组织和性能具有重要影响。通过对617B合金荒管进行不同变形量的冷轧实验,对其冷变形特性进行研究。对冷变形后的617B合金进行不同制度下的退火处理,对其退火过程中的组织演变规律进行研究,建立退火过程中的再结晶晶粒长大方程。结果表明:所构建的再结晶晶粒长大方程与实验数据值吻合度较好;617B合金退火过程中组织均匀性受退火温度影响最大;由于碳化物条带的存在,退火过程中易出现组织不均匀的现象,综合考虑晶粒尺寸和组织均匀性两个因素最终确定冷轧变形量为20%,中间退火制度为1140℃、10 min时得到的组织最为均匀。
[Abstract]:The cold deformation process has an important effect on the dimensional accuracy, microstructure and properties of 617B alloy pipe. The cold deformation characteristics of 617B alloy after cold deformation were studied. The microstructure evolution of 617B alloy during annealing was studied. The recrystallization grain growth equation during annealing is established. The results show that the structure homogeneity of the recrystallized grain growth equation is most affected by annealing temperature during annealing. Because of the existence of carbides, it is easy to appear the phenomenon of uneven structure during annealing. Two factors, grain size and microstructure uniformity, were taken into account to determine that the cold rolling deformation was 20 and the microstructure was the most uniform when the intermediate annealing temperature was 1140 鈩，

本文编号：1670749