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采用晶体取向分布函数(ODF),极图和TEM分析了高纯铝箔在不同的分级退火工艺过程中再结晶结构的演变,研究结果表明:高纯铝的变形结构主要由S取向组成,另含有少量的Cu织构和Bs织构,2级退火箔材中立方织构含量高于3级退火的;其中在200度低温退火时在亚晶界形成立方核心,并沿亚晶界析出含铁化合物,520℃高温退火后立方织构取向密度最大,R织构含量最少,在250℃低温退火时,形成复大角亚晶界,铁固溶在铝基体中,520℃高温退火后铁在晶内析出,立方织构减少,R取向增强。 相似文献
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通过背散射电子衍射技术检测并研究了铸轧-冷轧法制备超薄双零铝箔坯料过程中晶粒取向演变规律。结果表明,铸轧铝箔坯料中形成较强的(102)[221]、(101)[101]及旋转立方(001)[1-1-0]织构组分;随均匀化退火温度升高、保温时间延长,坯料的晶粒取向演变为立方织构,以(001)[100]和(101)[101]织构组分为主,且立方织构取向密度最大为15.786;中间退火后,立方织构(001)[100]取向密度降低至1.197。而热处理不能完全消除变形织构组分(101)[101],其存在于整个铝箔坯料制备过程。 相似文献
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对不同冷轧压下率IF钢进行模拟连续退火试验,研究在冷轧-退火过程中冷轧压下率对微结构和织构演变及深冲性能的影响。结果表明:冷轧变形后原始晶粒拉长变形,样品具有强α取向线织构和γ取向线织构,α取向线织构的极密度最大值随压下率(65%、72%、80%)的增加从7.7逐渐增加至13.1。模拟连续退火后发生完全再结晶,在65%、72%、80%冷轧压下率下分别生成15.6、18.8和17.6 μm的均匀等轴晶。模拟连续退火后,α取向线织构被消除,γ取向线织构变化不大,极密度最大值转移到γ取向线,且随着压下率的增加从7.8略微增大到8.6。不同压下率样品模拟连续退火后,深冲性能良好,随着压下率的增加,r-从1.77 逐渐增大至2.17,Δr从0.54降低至0.02,n-从0.284减小到0.272。 相似文献
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在双辊连续铸轧过程中施加电磁-超声能场制备出1060铝合金铸轧板坯,经不同冷轧变形量的冷轧后退火,制备出系列铝板带,从晶粒大小、形态和取向等方面分析电磁-超声能场对铝板带再结晶组织与织构的影响。结果表明:电磁-超声能场可使铝合金铸轧板坯的平均晶粒尺寸减小50%,使第二相均匀弥散分布在晶内和晶界上,并能降低织构取向密度,使织构组分漫散分布;电磁-超声能场可加大铝合金铸轧板在冷轧-退火过程中的再结晶程度,并获得更加细小均匀的再结晶组织;电磁-超声能场还可降低铝合金铸轧板冷轧-退火后的再结晶织构强度,抑制晶粒的择优取向,提高铝合金铸轧板的深冲成型性能。 相似文献
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采用XRD织构测试仪在角度为0°~90°时测量W80Cu20合金及经多道次热轧后的不完整极图,应用三维取向分布函数(ODF)研究W-Cu合金热轧板材中织构的演变规律。结果表明:热轧前,W80Cu20合金的取向密度值接近1,织构强度很弱,取向不明显,认为没有织构出现;W80Cu20合金轧制变形后,织构强度增加,表现出明显的轧制织构特征,择优取向明显,织构的取向密度值较大,形成稳定的织构组分:Brass型织构取向{110}<112>、Copper型织构取向{211}<111>和旋转立方织构取向{200}<011>。 相似文献
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Effect of Y on Microstructure and Mechanical Properties as well as Corrosion Resistance of Mg-9Li-3Al Alloy 总被引:2,自引:1,他引:1
利用二次离子质谱仪对高压电解电容器用高纯铝箔的微量元素进行了分析,研究了微量元素含量及分布对铝箔织构及性能的影响.结果表明:铝箔中Fe、Si、Cu和Pb含量较高,Fe、Cu元素含量直接影响铝箔的电性能,而Si和Pb元素含量的变化,对铝箔的织构和电性能无直接影响.铝箔中微量元素的平均含量,是影响铝箔织构组成与最终电性能的主要因素.而Fe、Cu等微量元素在近表面深度方向上浓度梯度方向的改变和显著波动,可导致在腐蚀发孔过程中微量元素的微观作用机制发生改变,不利于隧道孔的稳定生长,也是影响铝箔最终电性能的又一个重要原因. 相似文献
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润滑剂对高纯铝形变织构的影响 总被引:8,自引:3,他引:5
采用ODF法研究和分析了润滑剂对高纯铝冷轧形变织构的影响,揭示了两种润滑条件下形变织构的演变规律.结果表明大冷轧变形程度下,采用机油润滑,形变织构为典型的面心立方金属的轧制织构,即由强的B-、Cu-及S-织构组分构成,而且取向分布的密度峰值处在S-取向位置;煤油润滑时轧制织构相对较弱,但Cu织构最强,同时产生了明显的剪切织构{001}〈110〉(Rot.Cube-织构).采用机油润滑时,轧制变形比较均匀.低变形轧制时晶粒取向聚集于α线,随变形量增加,向β线取向聚集,最终形成铜型轧制织构;而煤油粘度小,轧制过程中接触表面摩擦系数较大,不均匀变形严重,低轧制程度时发现有表面剪切Rot.Cube-织构,随着塑性变形增加,Rot.Cube-织构逐渐向Cu-取向转化;变形至95%后,随着变形程度增加,S-织构减弱. 相似文献
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预变形及退火对高纯铝箔立方织构的影响 总被引:2,自引:0,他引:2
应用TEM和晶体取向分布函数方法研究和分析了预变形和退火工艺对高纯铝箔立方织构的影响。研究结果表明 ,预变形及退火主要通过影响晶体内的储存能大小 ,来影响Fe、Si的析出过程 ,影响成品箔材中立方织构 { 10 0 }〈0 0 1〉取向密度的大小。由于成品退火前Fe、Si能充分固溶在铝基体中 ,成品低温退火阶段可促使Fe、Si析出 ,增加立方取向晶粒的形核率 ,使成品在高温退火阶段晶粒沿立方取向择优长大 ,大大增加了高纯铝箔中立方织构的比例 相似文献
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JIZe-sheng WANGTao WANGGuo-jun ZHANGTao CHIDa-zhao 《材料热处理学报》2004,25(5):252-255
The textures induced by deformation processes of different crafts in air-condition used aluminium 1050H19 foils were measured by using X-ray goniometer. Combining with TEM analysis, effect of texture on deep-drawing property was discussed. It is show that deformation textures in the specimens, on which four types of rolling-crafts are carried out respectively, are all typical Cu components, and recrystallized R-, Cube-texture don‘t exist. Cu-texture is still the predominant component with different orientation density according to different rolling-craft. To specimens which are prone to cracking, their orientation densities of Cu-textures are higher, their textures are stronger and they contain P- and Goss-texture, which are harder to be deformed. The analyses indicat that with the decrease in the rate of reduction/rolling-time and the execution of intermediate holding, textures that are harder to be deformed are eliminated and orientation density of Cu-texture is weakened. Thus, deep-drawing property of aluminium foils is improved. 相似文献
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本文用晶体空间取向分布研究了含磷深冲钢冷轧和退火织构.仔细分析了冷轧和退火板材取向分布函数的特征.从观察到的特征可以认为,退火织构起源于微带和过渡带生核,随后这些再结晶晶粒借吞并基体形变织构而长大.含磷深冲钢与铝镇静深冲钢的退火板材之间晶体取向分布有明显的区别. 相似文献
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Experiment investigation of deep-drawing sheet texture evolution 总被引:3,自引:0,他引:3
Yazheng Liu Jinghong Sun Leyu Zhou Yonggang Tu Feng Xing Yanchang Guo Qiang Tong 《Journal of Materials Processing Technology》2003,140(1-3):509-513
To ensure the deep-drawability of the deep-drawing sheet, the normal anisotropy and planar isotropy of the sheet is required. The drawing property of the sheet is controlled by its crystallographic texture, the type and orientation density of the texture directly influence the drawing-quality of deep-drawing sheet. {1 1 1}1 1 2 and {1 1 1}1 1 0 are the ideal textures for deep-drawing sheet, because the correct texture gives the proper orientation of slip system so that the strength in the thickness direction is greater than that in the plane of the sheet. During the production processing of the deep-drawing sheet, the development of crystallographic texture is continuous, and the final texture character of the product is determined by the texture evolution processing at the different technological process. In the present work, the whole production flow of a coiled sheet has been flowed in Benxi Iron and Steel (Group) Co., Ltd., and the samples were cut from this coiled sheet at the different production flow, such as after hot rolling, cold rolling and recrystallization annealing, respectively. The texture evolution processing has been investigated for the whole production flow of the deep-drawing sheet. Some factors that influence the evolution of the crystallographic texture have been analyzed, such as the grain size of hot-rolled sheet, the reduction ration in the cold rolling, the annealing process, the precipitation of AlN during the coiling and, etc. This paper centers on the research of the texture evolution in each different process. An optimum technique to improve the deep-drawability of the deep-drawing sheet has been put forward. 相似文献
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研究了含Ti0.145—0.35%,Ti/(C+N)比为2.9—10.1的低碳深冲薄板,测定了不同Ti/(C+N)比时的织构,并与塑性应变比R值和实冲汽车零件的结果作了对照。当Ti/(C=N)>4时,主要织构为有利于深冲的(111)[112]织构;当Ti/(C+N)<4时,主要织构为不利于深冲的(100)[011]织构。深冲性好坏主要取决于薄板所具有的再结晶织构的类型和强弱,而与晶粒形状无关。用透射电镜观察了弥散的TiC,讨论了弥散相TiC对再结晶织构的某些影响。 相似文献
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CSP卷取温度对冷轧深冲钢板的影响 总被引:1,自引:0,他引:1
研究了热轧卷取温度对CSP(compact strip production)冷轧深冲板的性能、组织和织构的影响。CSP热轧板组织主要为多边形铁素体,随卷取温度降低,晶粒尺寸略有减小。660℃和680℃卷取的成品冷轧板组织为等轴晶粒,卷取温度不超过600℃时则以"饼型"晶粒为主。力学性能测试表明,低于600℃卷取的成品板屈服强度和抗拉强度较低,其加权平均塑性应变比(rm)可达到1.80以上,伸长率超过49%。随卷取温度升高,成品板的{001}〈110〉和{110}〈110〉织构的取向分布密度逐渐升高,{111}织构取向分布密度先升高后降低,{111}〈110〉和{111}〈112〉织构取向分布密度差值也是先升后降。 相似文献
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1 INTRODUCTIONLargequantityoftheAl Mn Mgalloy 310 4isusedinthemanufactureofaluminumbeverage .Muchattentionwaspaidtothecontroloftextureandearinginthedeepdrawingstagesofmanufacture .Thetex tureinthecanstockwasextensivelyinvestigated .Oneearingofaluminumalloyisverycloserelatedtothetexture ,agoodassociationofthetexturescompo nentsearingdropsobviously ,inthissituationthe 4 foldearingat 0°/90°andearingat± 4 5°occursto gether[15] .Theappearanceof 4 foldearingat 0°/90°isduetothecubetext… 相似文献