沈阳工业大学学报2016，Vol.38Issue(5)：486-490,5.DOI:10.7688/j.issn.1000-1646.2016.05.02
去应力退火对 DZ125合金再结晶行为的影响
Effect of stress relief annealing on recrystallization behavior of DZ125 alloy
摘要
Abstract
In order to obtain the directional solidification superalloy with excellent mechanical properties at high temperature and reduce the recrystallization phenomenon of directional solidification blade in the production process,the stress relief annealing treatment was conducted for the DZ125 alloy after shot blasting,and then the heat treatments at different temperatures were performed for the DZ125 alloy.In addition,the microstructures of DZ125 alloy were observed with scanning electron microscope (SEM).The results show that when the Almen value which characterizes the shot blasting strength is 0.25 mm,a small amount of cellular recrystallization still exists in the DZ125 alloy after the stress relief annealing at 870 ℃ for 500 h and the heat treatment at 1 000 ℃ for 4 h are successively performed.After the heat treatment at 1 150 ℃ for 4 h,the depth of cellular recrystallized layer decreases by about 30%.After the heat treatment at 1 230 ℃ for 4 h,the depth of equiaxed recrystallized layer decreases by about 30%.When the Almen value is 0.17 mm and after the stress relief annealing at 870 ℃ for different time and the heat treatment at 1 230 ℃ for 4 h are successively performed,it is found that with increasing the annealing time,the depth of recrystallized layer gradually decreases.When the annealing time is 500 h,the depth of recrystallized layer decreases by about 50%.关键词
定向凝固/力学性能/再结晶/去应力退火/热处理/微观组织/喷丸强度/DZ125合金Key words
directional solidfication/mechanical property/recrystallization/stress relief annealing/heat treatment/microstructure/shot blasting strength/DZ125 alloy分类
矿业与冶金引用本文复制引用
刘丽荣,浦一凡,彭志江,张明俊,田素贵..去应力退火对 DZ125合金再结晶行为的影响[J].沈阳工业大学学报,2016,38(5):486-490,5.基金项目
辽宁省自然科学基金资助项目（2014028014）；辽宁省教育厅高等学校科学技术研究资助项目（L013057）． （）
