摘要
采用真空电磁搅拌电弧熔炼制备的Ni-7at%W合金初始锭,经热锻、热轧、大形变量冷轧和最终再结晶退火制备出100μm厚合金基带。采用X射线衍射(XRD)和电子背散射衍射(EBSD)研究了轧制过程中的中间退火处理对再结晶织构的影响。结果表明,提高中间退火次数可以削弱轧制织构α取向线上的取向强度,提高β取向线上的取向强度,促进轧制组织中立方取向晶核的形成,消除再结晶过程中晶粒异常长大现象,最终提高再结晶立方织构的比例。
The Ni-7at%W ingot was prepared by the vacuum arc melting with electromagnetic stirring, then the Ni-7at% W substrate with a thickness of 100 μm was fabricated by hot forging, hot rolling, cold rolling and recrystallization annealing. The effect of intermediate annealing treatment on the recrystallization texture of Ni-Tat%W alloy substrate was investigated by X-ray diffraction （XRD） and electron backscatter diffraction （EBSD）. The results show that the intermediate annealing treatments strengthen the intensity of β-fiber and at meantime reduce the intensity of α-fiber in the deformed alloy. Moreover, it favors the formation of cube nuclei in the rolling structure and the elimination of abnormal grain growth phenomenon during recrystallization. All of these will lead to higher volume fraction of recrystallization cube texture.
出处
《金属热处理》
CAS
CSCD
北大核心
2014年第1期89-94,共6页
Heat Treatment of Metals
基金
上海市科技创新行动计划重大科技项目(11DZ1100303)
