冷轧压下率对连续退火Ti-IF钢组织和织构的影响  

Effect of Cold-rolling Reduction on the Microstructure and Texture of a Continuously Annealed Ti-IF Steel

作　　者：郑之旺[1] 刘庆春[1] 李叙生 

机构地区：[1]攀钢集团研究院有限公司,四川成都611731 [2]攀枝花钢钒股份有限公司技术质量部,四川攀枝花617062

出　　处：《钢铁钒钛》2010年第1期40-45,共6页Iron Steel Vanadium Titanium

摘　　要：以工业生产的Ti-IF钢热轧板为研究材料,结合连续热镀锌线的工艺特点,采用实验室冷轧、盐浴退火方法和金相、X射线织构测试等分析手段,研究了冷轧压下率对组织和织构的影响规律。试验结果表明,随着冷轧压下率从60%提高到90%,冷轧态α取向线上的取向密度不断增强,而且主要形成了{223}<110>和{114}<110>织构,γ线上的{111}<110>和{111}<112>织构亦有所增强;退火后铁素体晶粒尺寸从9.0级细化到10.5级;试验钢退火后仍具有较强的{223}<110>和{114}<110>织构,且随着冷轧压下率的提高,{111}织构有增强的趋势。要获得强的{111}织构,冷轧压下率需在80%以上。According to the process of a continuous hot-dip galvanizing line, salt bath annealing simula＇ tion was conducted to study the evolution of microstructure and textures of acommercially produced Ti-IF steel during cold-rolling and annealing by means of optical microscopy and X-ray texture measurement with emphasis on the effect of cold-rolling reduction on the microstructure and the textures. The results showed that as the cold-rolling reduction increases from 60% to 90% the textures along α fiber skeleton are constantly enhanced and {223} 〈 110 〉 and {114} 〈 110 〉 tended to be the main textures. On the other hand, {111} 〈011 〉 and {111} 〈 112 〉 texture along γ fiber skeleton are also improved. The ferrite grain size after annealing was refined from ASTM No. 9.0 to No. 10.5. The tested steel still exhibited stronger 12231 〈 110 〉 and { 114} 〈 110 〉 textures and the { 111 } texture tends to be increased with the cold-rolling reduction. The cold-rolling reduction should be kept above 80% in order to obtain strong { 111 } texture.

关 键 词：TI-IF钢 冷轧压下率 显微组织 织构 

分 类 号：TG335.12[金属学及工艺—金属压力加工]