摘要
通过等温热压缩试验及变形后固溶热处理试验,研究了变形温度、应变速率、应变、固溶温度及固溶时间对GH4586高温合金微观组织的影响。结果表明:γ相再结晶程度随着变形温度和应变的增大逐渐增大,随着应变速率的增加先降低后增大;γ相晶粒尺寸随着变形温度的升高逐渐减小,随着应变速率的增大先减小后增大,随着应变的增大先减小后趋于稳定;γ相再结晶程度及晶粒尺寸随着固溶温度的升高和固溶时间的延长显著增加。GH4586高温合金最佳热变形工艺参数为:变形温度为1060~1080℃、应变速率为0.01~0.1 s^-1。在该工艺参数范围内所得组织为均匀细小的等轴组织。
The effects of deformation temperature,strain rate,strain,solution temperature and solution time on the microstructure of GH4586 superalloy were studied by the isothermal hot compression test and the solution heat treatment test after deformation.The results show that the recrystallization degree ofγphase gradually increases with the increase of deformation temperature and strain,and decreases first and then increases with the increase of strain rate;the grain size ofγphase decreases gradually with the increase of deformation temperature,decreases first and then increases with the increase of strain rate,and decreases first and then tends to be stable with the increase of strain;the recrystallization degree and grain size ofγphase increase significantly with the increase of solution temperature and solution time.The optimal hot processing parameters of GH4586 superalloy are as follows:deformation temperature is 1060-1080℃and strain rate is 0.01-0.1 s^-1.The structure obtained within this processing parameter range is uniform and fine equiaxed structure.
作者
王凯
苗金武
陈科
罗皎
WANG Kai;MIAO Jin-wu;CHEN Ke;LUO Jiao(Xi'an Space Engine Company Limited,Xi'an 710100,China;Shaanxi Key Laboratory of High-Performance Precision Forming Technology and Equipment,School of Materials Science and Engineering,Northwestern Polytechnical University,Xi'an 710072,China)
出处
《塑性工程学报》
CAS
CSCD
北大核心
2020年第7期72-78,共7页
Journal of Plasticity Engineering
