第42卷第11期
2017年
11月
全属熟压程 HEAT TREATMENT OF METALS
稀土La和退火工艺对高强F钢组织的影响
郝柳，任慧平，金自力"2，王朝毅，李东岳，李渊浩（1.内蒙古科技大学材料与冶金学院，内蒙古包头014010；
2.内蒙古自治区白云鄂博矿多金属资源综合利用重点实验室，内蒙古包头014010）
Vol. 42 No. 11 Novemher 2017
摘要：以Fe-Nb-Ti高强IF钢为研究对象，在实验室制备含稀土La和不含稀土La的两种成分试验冷轧带，在Gleeble-1500型热模拟试验机上对两试验钢进行连续退火试验，研究了稀土La和退火工艺对IF钢组织的影响。结果表明：稀土La的添加阻碍了IF钢的再结晶过程，使再结晶晶粒尺寸更加细小，含La钢再结晶平均晶粒尺寸为8.24μm，不加La钢再结晶平均晶粒尺寸为11.08μm。
随退火温度升高和保温时间延长，IF钢再结晶更加充分，更有利于再结晶组织趋于均勾化。关键词：稀土La;退火；高强IF钢；组织
1文献标志码：A
中图分类号：TG142.1*1
文章编号：0254-6051(2017)11-0035-04
Effects of rare earth La and annealing process on microstructure of
high strength IF steel
Hao Liu', Ren Huiping" , Jin Zili'-2 , Wang Chaoyi', Li Dongyue' , Li Yuanhao?
(1. School of Material and Metallurgy , Inner Mongolia University of Science and Technology , Baotou Inner Mongolia 014010 , China ;
2. Key Lab of Integrated Exploitation of Bayan Obo Multi -Metal Resources , Baotou Inner Mongolia O014010 , China)
Abstract : Two kinds of eold rolling strip were prepared with Fe -Nb-Ti high strength IF steel in the laboratory , one contains La and the other without La. The continuous annealing test of two tested steels on Gleeble -1500 model thermal simulator was carried out , and effects of La and annealing process on microstructure of IF steel were investigated. The results show that the addition of rare earth La hinders the recrystallization process of IF steel and makes the recrystallized grain size smaller - The average grain size of the recrystallized steel containing La, or not, is 8. 24 μm and 11. 08 μm, respectively. With the increase of annealing temperature and prolonging of holding time
recrystallization of IF steel is more fully and more favorable to homogenization of recrystallized structure Keywords : rare earth La; annealing ; high strength IF steel ; microstructure
近年来，随着汽车工业对轻量化、安全、环保等要
收稿日期：2017-03-20
基金项目：包钢新体系特色汽车高强钢板的研究开发（963570）
作者简介：郝柳（1990一），女，硕士研究生，主要从事高强汽车钢板组织织构方面的研究，E-mail：13347195380@163.com。通讯作者：金自
力，教授，硕士，联系电话：13848269931,E-mail:jinzl6310@126.com DO1:10. 13251/j. issn. 0254-6051. 2017. 11. 007
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