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借助电子背散射衍射(EBSD)技术,以罩退生产的冷轧Ti-IF钢及含磷Ti-IF高强钢为目标,分析不同磷、钛合金质量分数对产品特征织构的影响。结果表明,磷元素虽然有利于γ取向线上{111}〈112〉织构的增加,但也增加了组分强度差,不利于塑性应变比r值,并且磷元素对{111}织构发展的促进作用取决于钢中过剰钛的质量分数,过剩钛质量分数过高会促进FeTiP二相粒子的析出,从而阻碍{111}取向再结晶晶粒的长大,弱化{111}面织构的强度。研究结果对该材料合金成分的调整起到了指导作用。为了保证所生产的含磷IF高强钢获得一定的强度,同时兼备良好的冲压性能,应降低IF钢中的钛质量分数,适当加入铌以弥补因钛减少对间隙原子固定产生的影响。
With the help of EBSD, cold-rolled Ti-IF steel and phosphorus-containing Ti-IF high-strength steel were retrofitted to study the effect of different phosphorus and titanium alloys on the texture of products. The results show that although phosphorus element is beneficial to the increase of {111} <112> texture in γ-orientation line, it also increases the difference of component strength, which is unfavorable to the value of plastic strain ratio r, and the development of {111} The promoting effect depends on the mass fraction of titanium in the steel. Excessive titanium mass fraction will promote the precipitation of two-phase FeTiP particles, hinder the growth of {111} -oriented recrystallized grains and weaken the {111} plane texture Strength of. The results of this study have played a guiding role in the adjustment of the alloy composition of the material. In order to ensure that the produced high strength IF steel containing IF can obtain certain strength and good stamping performance, the content of titanium in IF steel should be reduced and niobium should be added to make up for the effect of titanium reduction on interstitial atom fixation.