退火温度对06Cr13不锈钢冷轧板织构和力学性能的影响

06Cr13不锈钢(/%:0.03C,0.45Si,0.22Mn,0.020P,0.002S,12.20Cr)3.5mm热轧板经11道次冷轧成0.375 mm冷轧板。利用CCT-AV-Ⅱ模拟退火实验机研究了800~925℃退火对06Cr13不锈钢冷轧板的织构组分和力学性能的影响。结果表明,随着退火温度的升高,深冲性能有利的{111}织构组分含量上升,而不利组分{001}110,{114}110,{112}110,{112}111和{110}110含量总和下降;在875℃退火时,{111}110与{111}112织构组分含量的差值最大,{111}织构的均匀性最差;06Cr13不锈钢的强度和延伸率在875℃退火后表现出很明显的各向异性。综合分析,该06Cr13不锈钢冷轧板的适合退火温度为(850±10)℃。     

超低碳Ti+Nb-IF钢组织与性能的研究

在实验室条件下研究了Ti+Nb-IF钢再结晶温度与时间以及退火制度对组织与性能的影响.实验结果表明:Ti+Nb-IF钢再结晶开始温度为680 ℃,在800 ℃退火温度下,再结晶完成时间为60 s.当退火温度为870 ℃时,综合力学性能最好,其抗拉强度为313 MPa,屈服强度为156 MPa,伸长率50.8%,n值为0.281,r值为2.07.退火织构特征表现为较强的γ纤维织构和较弱的α纤维织构,γ纤维织构主要为{111}<110>和{111}<112>,最强织构组分在{111}<112>.     

冷轧微碳深冲钢板的非{111}织构及其形成原因和对策

结合实际生产和实验室实验,介绍了试制的冷轧微碳深冲钢板中出现的远离常规的非{111}织构的情况。分析了这种非{111}织构的特征及其对钢板塑性应变比的影响,并研究了非{111}织构的工序演变过程及冷轧织构的形成特点,在此基础上进一步分析了非{111}织构的热轧原因,并研究了冷轧压下率和罩式退火升温速度对非{111}织构的影响。最后,依据非{111}织构的形成特点和{111}织构的产生条件提出了控制冷轧微碳深冲钢板织构的对策。     

磷、钛对含磷IF高强钢织构的影响

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。     

精轧温度对超纯21%Cr铁素体不锈钢织构演变和成形性能的影响

研究了超纯21%Cr铁素体不锈钢精轧温度对织构演变规律和成形性能的影响。将粗轧板坯切块并在900~750℃范围内进行精轧,随后经相同的热轧退火、酸洗、冷轧及退火处理,系统研究了试样的宏观织构、显微织构和成形性能的变化规律。结果表明:精轧温度对铁素体不锈钢的织构演变有重要影响,降低热轧精轧温度有利于增加热轧退火板中{111}再结晶织构组分;冷轧及冷轧退火板的织构分布具有明显的遗传性,热轧板中较高的{111}再结晶织构组分,促进了冷轧退火板中{111}再结晶织构的生成,从而提高了铁素体不锈钢的成形性能。     

低温板坯加热取向硅钢形变和初次再结晶织构的演变规律

 采用取向分布函数和取向线分析方法对低温板坯加热取向硅钢从热轧到初次再结晶工艺阶段的织构进行了研究。研究表明：一次冷轧后各层的织构组分与热轧板各层面的织构组分存在着继承关系,次表层存在很强的{001}<110>织构,中心层的织构和热轧板的中心层相似,存在强的{001}<110>和{112}<110>织构;中间退火后发生再结晶,各织构组分的强度有所减弱,Goss织构组分再次出现;二次冷轧后沿厚度方向上的织构不均匀性不明显,{111}<112>织构强度最高,几乎是其他织构组分的1倍,{001}<110>织构大幅降低;初次再结晶后织构沿厚度方向没有明显的不均匀性,{111}<110>为最强的织构组分,并且具有一定强度的Goss位向。     

铝和铬在无取向电工钢晶粒长大过程中对晶界的作用

研究了铝和铬元素在无取向电工钢晶粒长大过程中对织构及晶界变化的影响规律.试验结果表明:电工钢在晶粒长大过程中的主要织构组分均为{111}＜112＞.在晶粒生长期间,不加铝的1号试样中,{111}＜112＞、{111}＜110＞织构组分强化,而{100}＜001＞织构组分弱化;与1号试样相比,在加入0.2%的铝(质量分数...     

退火工艺对3.15 % Si冷轧无取向硅钢组织和织构的影响

试验研究了退火温度（850~950℃）和时间（5~18 min）对2.3 mm热轧硅钢板（/%:0.036C,3.15Si,0.21Mn,0.005P,0.007S,0.032Al）6道次轧制的0.35 mm冷轧板组织和织构的影响。结果表明,退火温度越高,晶粒平均尺寸越大,900℃5 min退火时平均晶粒尺寸41.39μm,试样织构主要集中在γ取向线上的{111}＜112＞;织构组分和{111}＜110＞;织构组分;900℃18 min退火时平均晶粒尺寸为48.08μm,试样的{111}面织构和{112}面织构密度都明显减弱,{001}面织构增强,磁性能较优。     

低碳钢板冷轧织构的不均匀性

用X射线衍射法测量了冷轧低碳钢板的表层和心部织构.实验结果表明,钢板表层主要包含{112}〈110〉和{001}〈110〉织构组分,心部主要包含{112}〈110〉和{111}〈110〉织构组分,说明低碳钢板冷轧织构具有不均匀性.用改进的Sachs模型模拟了体心立方金属冷轧织构的演化过程,与实验结果有较好的一致性.     

微碳深冲钢板非{111}织构的形成过程

结合实际生产,采用金相分析、织构测量和透射电镜等方法,研究了微碳深冲钢板中出现的非{111}织构在钢板再结晶时的形成过程,并分析了非{111}织构与冷轧压下率和析出物的关系。研究结果表明：非{111}织构在冷轧变形后即已形成,冷轧压下率较小时,非{111}织构组分相对{111}织构较强;冷轧组织中存在的非{111}取向晶粒在退火过程中会优先成核和优先生长;非{111}织构的形成对AlN的析出不敏感。     

Effect of processing and heat treatment on behavior of Cu-Cr-Zr alloys to railway contact wire

A new series of Cu-Cr-Zr alloys to be used as railway contact wire, Cu-0.26 wt pct Cr-0.15 wt pct Zr, Cu-0.13 wt pct Cr-0.41 wt pct Zr, and Cu-0.34 wt pct Cr-0.41 wt pct Zr, were studied. The results indicated that processing and aging treatment had an effect on the microstructure, tensile strength, and electrical conductivity behavior of the Cu-Cr-Zr alloys. Process I (solution treatment + cold work + aging) was superior to process II (cold work + solution treatment + aging), because precipitation can occur heterogeneously at the dislocations and subcells. An appropriate processing and aging treatment may improve the properties of the alloys due to the formation of fine, dispersive, and coherent precipitates within the matrix. It is demonstrated that the best combination of tensile strength and electrical conducitivity, on the order of 599 MPa and 82 pct IACS (International Annealed Copper Standard), respectively, can be obtained in alloy Cu-0.34 wt pct Cr-0.41 wt pct Zr in the solution-heat-treated, cold-worked, and aged condition. The mechanism of tensile and conductive properties of Cu-Cr-Zr alloy is also discussed.     

Ti-26Nb-4Zr合金冷轧板材的织构和力学性能

采用X射线衍射和室温拉伸方法研究了冷轧变形和固溶处理对Ti-26Nb-4Zr合金板材的织构和力学性能的影响.研究发现,50%冷轧时形成了{001}〈uvw〉织构,随着冷变形量的增加,逐渐形成了{121}〈111〉和{001}〈110〉混合织构,〈110〉方向由与轧制方向垂直转到与轧制方向平行.800℃固溶处理后,随着变形量的增加,{111}〈110〉再结晶织构形成并逐渐增强,但〈110〉方向始终保持与轧制方向平行.由于加工硬化及晶粒细化的作用,导致随着变形量增加,冷轧板材的强度逐渐提高,塑性降低.固溶处理后,由于发生再结晶,使得板材的塑性相比冷轧态明显提高.      

再结晶阶段加热速度对低碳冷轧板罩式退火过程组织和织构的影响

在实验室条件下模拟CSP热轧板为基板生产的低碳冷轧板罩式退火过程,研究再结晶阶段加热速度对冷轧板罩式退火过程组织和织构的影响。结果表明,压下率83.3%的冷轧板,随着再结晶阶段加热速度的增加,会使试样再结晶温度降低,再结晶过程提前完成,{001}110织构变强,{111}110织构先减少后增加,{111}112织构先减少后增加出现峰值,当加热速度超过50℃/h时又减小。在加热速度30~40℃/h间变形织构{112}110有较低的密度值。再结晶阶段加热速度40℃/h的退火工艺成品组织为饼形晶粒,{001}110织构密度较低,{111}110和{111}112密度较强,密度值接近。     

基于CSP工艺稀土冷轧板罩式退火中组织织构演变

 采用金相显微镜和X射线衍射仪对CSP(Compact Strip Production)稀土板热轧、冷轧及退火3个阶段的组织和织构进行了检测和分析,并结合文献讨论了稀土板组织织构的演变规律。结果表明：稀土冷轧板以{223}<110>、{001}<110>、{112}<110>为主要织构,退火后形成了以{223}<110>和{111}<110>为主的再结晶织构,织构密度均达8. 5以上,{223}<110>和{111}<110>取向差为10°。稀土板开始再结晶需要的温度较高,并且再结晶完成需要的时间较长。再结晶初期织构变化比后期小。试验稀土板退火后{111}/{001}值极大,{111}<011>织构与{111}<211>织构密度差约为6。     

退火工艺对DC04汽车板再结晶组织和织构的影响

以酒钢CSP工艺DC04冷轧汽车板为原料,通过实验室模拟退火工艺,采用OM、EBSD、ODF技术,研究退火工艺对其组织和织构特征的影响。结果表明,DC04汽车板退火组织为铁素体和少量渗碳体,575℃退火1h再结晶开始,730℃退火1h后再结晶较为充分,并随着退火时间的延长,铁素体晶粒长大。不同压下率的DC04冷轧板和退火板中,主要织构均为bcc金属中典型的α(<110>//RD)纤维织构和γ（<111>//ND）纤维织构。随着压下率增加,{111}<112>织构的取向密度明显大于{111}<110>织构的取向密度。730 ℃退火后,低压下率67%的退火板织构中有微弱的{001}<110>取向,但随着压下率增大,这种织构逐渐消失,而形成较强的{111}<112>、{111}<110>有利织构。增加变形量有利于获得有利的{111}织构而抑制不利{001}织构的生成,从而提高DC04的深冲性能。     

X-ray diffraction study of the structural evolution in a grade 1469 (Al-Cu-Li) alloy during the production of hot-rolled sheets

X-ray diffraction is used to study the structural changes in a grade 1469 (Al-Cu-Li) alloy with a high lithium content that occur during the production of hot-rolled sheets according to the ingot → pressed strip → hot-rolled sheet schedule. In the pressed strip, a multicomponent Bs {110}〈112〉, Cu {211}〈111〉, and S {123}〈111〉 texture forms, which is typical of articles pressed from such alloys, and an unusual intense single-component texture of the Ex₁ {011}〈111〉 type forms in the hot-rolled sheets. Its formation is stimulated by cross rolling of the sheets. The low strength characteristics of the hot-rolled sheets after heat treatment are related to an elevated heating temperature used for quenching and to the oriented precipitation of the lamellar particles of the hardening T ₁ phase.     

The effect of solution constitute on continuous annealing steel plate recrystallization texture and stamping property

Recrystallization texture of steel plate is affected by substitution solid solution and interstitial solid solution.This article finished texture test and stamping test about low carbon aluminium killed steel,IF steel, phosphorus strengthen steel,Si -Mn -P strengthen steel.It can be found that all kinds of steel has similar intensity {111} texture in permanentφ= 45°about level 10.Interstitial solid solution steel had {101} texture and substitution solid solution steel had {112} texture.Based on recysstallization principle and stamping test, the effect of solution on recrystallization texture is discussed.It point out that interstitial solid solution impediment {111} texture forming and caused to {101} texture remained in steel.The phenomenon strengthen anisotropic property and reduction stamping property.Similar to substitution solid solution,it would impediment {111} texture too,but {101} texture changed to {112} texture.     

Formation of crystallographic texture in titanium nickelide single crystals during rolling

The texture formation in the single crystals of the Ti-48 at % Ni-2 at % Fe alloy rolled at a temperature of 350°C up to a strain of 80% in eleven different initial orientations is examined. There are three stable initial orientations that remain unchanged in rolling: {011}〈011〉, {111}〈011〉, and {111}〈112〉. The TiNi single crystals are shown to be deformed by means of a combined action of slip in systems {011}〈001〉 and twinning in systems {114}〈221〉 and {118}〈441〉. The types of formed rolling texture in the single crystals depend on their initial orientation and strain.     

Deformation textures of AA8011 aluminum alloy sheets severely deformed by accumulative roll bonding

A fully annealed AA8011 aluminum alloy sheet containing a number of large particles (∼5 μm) was severely deformed up to an equivalent strain of 12 by an accumulative roll-bonding (ARB) process. The texture evolution during the ARB process was clarified, along with the microstructure. The ARB-processed aluminum alloy sheets had a different texture distribution through the sheet thickness, due to the high friction between the roll and the material during the ARB process. The shear textures composed of {001} 〈110〉 and {111} 〈110〉 orientations developed at the sheet surface, while the rolling textures, including Cu {112} 〈111〉 and Dillamore {4,4,11} 〈11,11,8〉 orientations, developed at the sheet center. The textural change from a shear texture to a rolling texture at the sheet center during the ARB process contributed to an increase in the fraction of high-angle boundaries. Also, a large number of second-phase particles in the AA8011 alloy sheets weakened the texture. Up to the medium strain range (below ɛ=6.4), relatively weak textures developed, due to the inhomogeneous deformation around the second-phase particles; after the strain of 6.4, strong rolling-texture components, such as the Dillamore and Cu orientations, developed. This remarkable textural change can be explained by the reprecipitation of fine particles in grain interiors.