热轧钼板退火过程中的微观组织演变  

MICROSTRUCTURE EVOLUTION DURING ANNEALING OF HOT ROLLED MOLYBDENUM PLATE

作　　者：魏修宇[1,2] 

机构地区：[1]硬质合金国家重点实验室,湖南株洲412000 [2]株洲硬质合金集团有限公司,湖南株洲412000

出　　处：《中国钼业》2016年第3期48-52,共5页China Molybdenum Industry

基　　金：湖南省自然科学基金株洲市联合基金重点项目(13JJ8024)

摘　　要：通过金相组织观察、EBSD分析等手段研究了不同热轧变形量的热轧钼板经不同温度、不同时间退火后的微观组织演变规律.研究结果表明：一定范围内提高退火温度及延长退火时间均有助于再结晶的进行,当总变形量为6 5 % 时,其最合适的退火工艺为1 200 r 下加热1 - 2 Z -随着热轧总变形量的增加,热轧钼板经相同工艺退火后的的再结晶晶粒尺寸逐渐变小.Molybdenum plates were prepared by isostatic pressing and intermediate frequency sintering,and then were rolled and annealed with different rolling deformation rate and annealing process. Microstructures of the annealed sample were investigated by means of metallographic microscope and EBSD. Grain size was measured by using linear intercept method. The results show that raising annealing temperature and prolonging annealing time in certain range are helpful for recrystallization. The proper annealing process for pure molybdenum plate is 1 200 ℃for 1 ~ 2 h when the total deformation rate is 65%. With the increase of the total deformation rate,the recrystallized grain size becomes finer and its distribution becomes more uniform.

关 键 词：钼板材 热轧变形量 退火温度 退火时间 微观组织 

分 类 号：TG339[金属学及工艺—金属压力加工] TG156.2