合金元素对双相钢形变及退火织构的影响

来源期刊：冶金分析2011年第2期

论文作者：朱国辉 杜宇 张学辉 毛卫民

文章页码：32 - 37

关键词：双相钢板； 形变织构； 双相退火织构； 合金元素

Key words：dual-phase steel sheet； deformation texture； dual-phase annealing texture； alloying element

摘    要：分析了双相钢冷变形过程中形变织构的演变规律以及合金元素对双相钢形变织构的影响规律。分析结果表明,虽然存在有少量珠光体,但双相钢冷变形织构与体心立方金属相近;非碳化物形成元素Si的加入对形变织构没有明显的影响;碳化物形成元素Cr和Nb导致形变织构在α取向线的{112}<110>取向位置上的取向密度增强。测试分析了双相退火过程中钢的织构演变规律。结果表明,退火时晶粒的取向将沿着α取向线向γ取向线位置转变,Si或Cr对晶粒取向改变的阻碍作用不明显,微合金元素Nb明显阻碍晶粒取向改变,退火织构仍保持很高的α取向线织构组分。对上述的实验结果进行了理论分析。

Abstract: The evolution law of deformation textures of dual-phase steels in cold deformation process and the effect of alloying elements on the deformation textures were studied.The results showed that,although a little pearlite existed,the cold deformation textures of dual-phase steel was close to body centered cubic metals.The addition of Si (non-carbide forming element) had no obvious influence on the deformation textures.The carbide forming elements such as Cr and Nb enhanced the orientation density of deformation textures in {112}<110> orientation position of in α orientation line.The evolution law of steel textures in dual-phase annealing process was tested and analyzed.The results indicated that,the orientation of crystal grains in annealing process would chang along with α line to orientation position of γ line.The hindering effect of Si or Cr on orientation change of crystal grains was not obvious.The microalloy element Nb obviously hindered the orientation change of crystal grains,so the annealing textures still remained very high textures component in α orientation line.The experimental results above were theoretically analyzed.