(北京科技大学 材料科学与工程学院，北京 100083)
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。
关键字: 镍基高温合金；退火；冷轧；静态再结晶
（School of Material Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China）
Abstract:Cold deformation has an important effect on the dimensional accuracy, microstructure and mechanical properties of alloy 617B pipes. The cold deformation characteristic of alloy 617B tube was investigated by single-pass cold rolling tests of different deformation degrees. The cold rolled alloy 617B was annealed under different conditions. The microstructure evolution mechanism was investigated, and the equation of recrystallized grain growth during annealing was established. The results shows that the grain size of alloy 617B tends to be uneven as a result of carbide strips. The size of recrystallized grain is mainly controlled by annealing temperature and the grain size predicted by the proposed grain model agrees well with the experimental results. The grain size is mostly uniform when the annealing treatment is (1140 ℃, 10 min) with the cold rolling reduction of 20%.
Key words: nickel-base superalloy; annealing; cold rolling; static recrystallization
