当前位置：首页 > 过刊浏览->2020年41卷第11期
挤压参数对镍基粉末冶金高温合金微观组织影响研究
Effect of Extrusion Parameters on Microstructure of Ni-based P/M Superalloy
浏览(2585) 下载(5)
- DOI:
- 作者:
- 宋晓俊 王超渊 汪煜 周磊 邹金文
SONG Xiaojun;WANG Chaoyuan;WANG Yu;ZHOU Lei;ZOU Jinwen
- 作者单位:
- 中国航发北京航空材料研究院先进高温结构材料重点实验室
Key Laboratory of Advanced High Temperature Structural Materials,Beijing Institute of Aeronautical Materials,Beijing 100095,China
- 关键词:
- 镍基粉末高温合金 挤压温度 挤压速度 挤压比 再结晶
Ni-based P/M superalloy extrusion temperature extrusion speed extrusion ratio recrystallization
- 摘要:
- 通过改变挤压工艺参数对镍基粉末冶金高温合金微观组织影响进行了研究。结果表明,挤压速度20 mm/s和挤压比4∶1时,随挤压温度升高,动态再结晶程度提高,当超过1100℃,晶粒呈现长大趋势;在1100℃,挤压速度50 mm/s,挤压比3∶1~8∶1时,挤压比超过6∶1,变形热对晶粒长大的影响较明显;在1100℃,挤压速度20 mm/s和挤压比4∶1时,随挤压速度增加,再结晶晶粒更加细小;当挤压速度达到80 mm/s,变形热导致再结晶晶粒长大。沿挤压方向,棒坯头部晶粒较粗,垂直挤压方向,棒坯边缘晶粒较细。The influence of extrusion parameters on microstructure of nickel-based powder metallurgy(P/M)superalloy was studied.The results show that when the extrusion speed is 20 mm/s and the extrusion ratio is 4:1,the dynamic recrystallization degree increase with the increase of extrusion temperature.When the extrusion speed exceed 1100℃,the grain size tend to grow.When the extrusion speed is 50 mm/s at 1100℃and the extrusion ratio is 3:1~8:1,the extrusion ratio is over 6:1,and the influence of deformation heat on grain growth is obvious.At 1100℃,the recrystallization grains become finer with the increase of extrusion speed at 20 mm/s and extrusion ratio of 4:1.When the extrusion speed reaches 80 mm/s,the deformation heat causes the recrystallization grain to grow.Along the extrusion direction,the head grain of the bar billet is thicker,while in the vertical extrusion direction,the edge grain of the bar billet is finer.