CAJ | 학술논문

以17%Cr超纯铁素体不锈钢的冷轧退火板为原料，研究了3%、6%、9%和12%横向预拉伸(即拉伸方向垂直于板材轧向)变形对其冲压成形表面抗皱性的影响。采用电子背散射衍射技术及X射线衍射技术探究了横向预拉伸前后板材内部织构取向和晶粒团簇的演变规律。结果表明，横向预拉伸9%后实验钢板表面抗皱性获得较大提高。由于在退火、横向预拉及纵向拉伸后{001}<uvw>取向晶粒含量均非常少，因此基于厚向塑性应变比差异的Chao起皱机理不适用实验钢，而基于平面剪切应变的Takechi模型能较好地解释实验结果。在横向预拉伸后，由于γ纤维织构晶粒簇的宽度降低、方向整体偏转，使得板材抗皱性得到提高。
이17%Cr초순철소체불수강적랭알퇴화판위원료，연구료3%、6%、9%화12%횡향예랍신(즉랍신방향수직우판재알향)변형대기충압성형표면항추성적영향。채용전자배산사연사기술급X사선연사기술탐구료횡향예랍신전후판재내부직구취향화정립단족적연변규률。결과표명，횡향예랍신9%후실험강판표면항추성획득교대제고。유우재퇴화、횡향예랍급종향랍신후{001}<uvw>취향정립함량균비상소，인차기우후향소성응변비차이적Chao기추궤리불괄용실험강，이기우평면전절응변적Takechi모형능교호지해석실험결과。재횡향예랍신후，유우γ섬유직구정립족적관도강저、방향정체편전，사득판재항추성득도제고。
Cup-drawing test was performed to study the effect of transverse pre-stretching, namely 3%, 6%, 9% and 12%deformation, on the surface ridging resistance during deep drawing of a 17% Cr ultra-purified ferritic stainless steel cold-rolled annealed sheet. The evolution of textures and grain clusters in the tested sheet after transverse pre-stretching was analyzed by electron back-scatter diffraction and X-ray diffraction. It is found that the ridging resistance apparently improves after the 9% transverse pre-stretching. Because the content of{001} <uvw> orientation grains is not enough to meet the requirement of the Chao ridging model, this model is not suitable for ridging of the tested sheet. However, the Takechi model, which is called an out-of-plane shearing strain model, is considered to be suitable for ridging of the tested sheet. It is concluded that the narrow of the width ofγ-fiber texture clusters and the deflection of grain clusters to the rolling direction are the major causes of improving the ridging resistance.