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冷轧压下率对铁素体区热轧Ti-IF钢冷轧板深冲性能的影响 总被引:2,自引:0,他引:2
研究了于铁素体区润滑热轧的Ti-IF钢在随后的冷轧及退火工艺中深冲性能的变化.结果表明,在冷轧压下率为75 %时IF钢所获得的r值最高.织构分析表明,于铁素体区润滑热轧的IF钢具有较强的{111}∥ND再结晶织构组分;冷轧时采用75 %的压下率和随后的退火工艺可获得最强的{111}∥ND再结晶织构;冷轧压下率进一步增加时,{111}∥ND再结晶织构将会削弱.这种织构变化与冷轧时ND纤维晶粒内部的剪切带变化有关. 相似文献
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涟钢冷轧产品初检合格率与同类产品相比偏低,主要是屈强比偏高、伸长率低、冲压性能差等。针对这一问题,对热轧、冷轧以及退火平整等工艺参数对冷轧冲压板产品合格率的影响进行了分析,结果表明通过优化热轧卷取温度、冷轧压下率、退火制度以及平整伸长率,可以将退火板卷的初检合格率提高到99.48%,满足冷轧冲压板批量生产的要求。 相似文献
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一个具有沿轧向B_8特性不低于1.90wb/m~2高磁通密度晶粒取向电工铜板或钢带的生产方法。本方法包括热轧、使AIN析出的连续退火、冷轧至最终厚度、脱碳退火和最终退火。其冷轧包括压下率在81~95%之间的最终强冷轧。 相似文献
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采用四辊可逆冷轧机组对热轧退火态含氮马氏体不锈钢420U6(/%:0.16C,13.63Cr,0.083N)进行了压下率10%~90%的冷轧,研究了冷轧压下率对该钢组织和力学性能的影响。试验结果表明:当冷轧压下率达到90%时,碳化物的数量由原始退火态的0.1×106个/mm2大幅提高至2.35×106个/mm2,而碳化物的平均直径则由1.11μm降低到0.22μm,同时碳化物的分布更加均匀。此外,材料的硬度和屈服强度分别由原始退火态的170 HV和335 MPa分别大幅提高到冷轧压下率为90%的325 HV和1 108 MPa,而延伸率在冷轧压下率为0%~40%时出现大幅下降,之后则逐渐稳定在6%左右。 相似文献
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高磁感晶粒取向硅钢是通过具有准确的(110)[001]晶粒取向来获得的。为了改善取向度需要一个大的最终冷轧轧压下率。为了使材料在最终退火中完成二次再结晶,增强抑制正常晶粒长大是必要的。后面的条件是由本文所叙述的一个由硫或硒与硼和氮组成的抑制系统来提供的。将3%硅钢并含有氮和一定范围的硼,硫和锰以及由硒碲代替硫的实验室试样的磁性进行比较,其工艺包括从热轧厚度直接轧到成品厚度(最大冷轧压下率为88%)以及两次中间厚度的热处理,其最终压下率分别为82%或61%。 相似文献
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The hot rolled strip of Fe-3Si steel was experimentally produced by thin slab casting and rolling (TSCR) process in the laboratory. The texture evolution rule was investigated during hot rolling and cold rolling. The texture distribution of cold rolled strips with four kinds of cold rolling reduction schedules was observed through X-ray diffraction method, and the orientation density variation of 1/16 layer, 1/8 layer, 1/4 layer, and 1/2 layer in thickness was analyzed. The cold rolled texture of steel A with four kinds of cold rolling reduction schedules was mainly composed of α and γ fibers. Cold rolling reduction ratio of 70% was more beneficial for obtaining more γ fibers. The γ fiber texture orientation density of {111}<011> and {111}<1 12> was the largest on the 1/8 layer and 1/4 layer and the least on the 1/16 layer and 1/2 layer for steel B. The texture orientation density of {001}-{223}<110> in the α fibers for steel C was increased, but the texture orientation density of {332}-{110}<110> was low. 相似文献
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冷轧无取向硅钢横向厚度差控制技术 总被引:1,自引:0,他引:1
针对某1 420 mm冷轧厂无取向硅钢投产后出现硅钢横向厚度差较大、难以达到下游客户要求的问题,对该厂热轧来料对冷轧生产无取向硅钢的适应性和UCM轧机板形调控性能进行分析。通过现场工业试验和辊系变形有限元仿真,研究了热轧、冷轧主要工艺参数对硅钢横向厚度差的影响,并优化相关工艺参数,最终提出满足客户需求的冷轧无取向硅钢横向厚度差控制技术方案。该技术方案应用于现场生产后,无取向硅钢横向厚度差控制在10 μm以内的命中率从应用前的不到60%上升到100%,而7 μm以内的命中率达到90%以上。 相似文献
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研究了模拟TSCR流程生产的低碳低硅无取向电工钢在热轧-冷轧-退火过程中织构的演变。对热轧板采用EBSD技术进行织构的测定,而对冷轧板和退火板采用X射线衍射技术进行了织构的测定。结果表明:热轧板沿板厚方向织构变化比较明显,在1/10处主要织构为α纤维织构和γ纤维织构;在1/4厚度处出现了较强的γ纤维织构;在1/2厚度处主要为较强的{001}〈110〉织构,其他织构分布漫散。冷轧板表面和中心处主要织构均为α纤维织构和γ纤维织构,但是在中心处两织构强度都显著减弱。退火板表面和中心处α纤维织构基本消失,γ纤维织构织构进一步加强,出现了{110}〈001〉高斯织构和{001}〈010〉立方织构。 相似文献
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0.23mm厚度高磁感取向硅钢片生产中的技术改进 总被引:3,自引:0,他引:3
0.23mm厚度高磁感取向硅钢片生产中存在的问题有:板坯加热温度太高,热轧板偏厚,边裂太多,需要多次常化、冷轧,表面质量不稳定。采取的措施是:研制低温板坯加热用钢,在钢中添加Cr,减薄热轧板的厚度,调整热轧、冷轧工艺,在MgO中添加适宜的添加剂,优化酸洗工艺等。 相似文献
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Samples of a ferritic stainless steel sheet were hot‐rolled with and without application of lubrication. The effect of the different hot rolling processes on the evolution of texture and microstructure after hot rolling, cold rolling and subsequent recrystallization annealing was studied by means of macro and micro‐texture analysis and microstructure observations. After hot rolling, the sample rolled with lubrication displayed uniform rolling textures through the sheet thickness, while the sample rolled without lubrication showed shear textures in the outer layers of the sheet. The finite element method was employed to reveal the strain states during hot rolling with and without lubrication. The texture of the hot rolled sheet strongly influenced the formation of texture after cold rolling and final recrystallization and, therewith, planar anisotropy as well as the severity of ridging of the final gauge sheet. Hot rolling with lubrication was beneficial to the formation of strong recrystallization textures through the whole thickness layers leading to an enhanced planar anisotropy of the sheet. The recrystallized sheet hot‐rolled without lubrication displayed less severe ridging, however, which was attributed to a less frequent formation of orientation colonies in the outer thickness layers of the sheet. 相似文献