Jun Luo
,
Hong Yan
,
Nan Zheng
,
Rong-Shi Chen
金属学报(英文版)
doi:10.1007/s40195-016-0378-1
Four kinds of Mg alloys with different Zn and Ca concentration were selected to analyze the effect of Zn and Ca concentration on the microstructure and the mechanical properties of Mg-Zn-Ca alloys. It was found that Zn and Ca concentration has a great influence on the volume fraction, the morphology and the size of second phase. The Mg-1.95Zn-0.75Ca (wt%) alloy with the highest volume fraction, continuous network and largest size of Ca2Mg6Zn3 phase showed the lowest elongation to failure of about 7%, while the Mg-0.73Zn-0.12Ca (wt%) alloy with the lowest volume fraction and smallest size of Ca2Mg6Zn3 phase showed the highest elongation to failure of about 37%. It was suggested that uniform elongations of the Mg-Zn-Ca alloys were sensitive to the volume fraction of the Ca2Mg6Zn3 phases, especially the network Ca2Mg6Zn3 phases; post-uniform elongations were dependent on the size of the Ca2Mg6Zn3 phase, especially the size of network Ca2Mg6Zn3 phase. Reduction in Zn and Ca concentration was an effective way to improve the room-temperature ductility of weak textured Mg-Zn-Ca alloys.
关键词:
Mg-Zn-Ca
,
alloys
,
Ductility
,
Hot
,
rolling
,
Texture
,
Second
,
phase
张进之
,
李生智
,
王廷溥
金属学报
国内外轧制中厚板操作经验是采用“中凸法”(或“中厚法”)轧制,以保证轧制过程的稳定,但按现有理论公式计算所得为保证轧制稳定的“中厚值”太大,影响钢板质量和成材率的提高本文给出了新的板凸度(中厚值)和轧制时轧辊凹度计算公式,经生产实践数据验证表明具有更好的实用性。
关键词:
中厚板
,
rolling
,
stability
,
crown
李纪恒
,
高学绪
,
朱洁
,
张茂才
,
何承先
金属学报
添加Nb改善了Fe81Ga19合金的塑性, 采用热轧和冷轧相结合的轧制工艺制备出厚度
为0.6 mm的(Fe81Ga19)+ 1%Nb(原子分数)合金薄板. 研究了(Fe81Ga19)+1%Nb合金轧态和退
火态薄板的织构及磁致伸缩效应. 结果表明: 合金的磁致伸缩与样品的织构密切相关, 再结
晶织构取决于热处理工艺. 轧态织构以{111}面织构和近似的{001}<110>旋转立方织构为主,
样品轧向的磁致伸缩系数λ∥=26×10-6. 在1250和1300 ℃保温2 h后水淬样品的织构分别呈现为近似的{011}<100>Gauss织构和单一{001}<100>立方织构, 其磁致伸缩
(3/2)λRD分别达到106×106和134×10-6
关键词:
Fe-Ga合金
,
rolling
,
texture
,
magnetostriction
Z.L. Mi
,
D. Tang
金属学报(英文版)
he influence of cold rolling reduction on microstructure and mechanical properties of the TWIP (ttwinning induced plasticity) steel was investigated. The results indicated that the steel had better comprehensive mechanical properties when cold rolling reduction was about 65.0% and the annealing temperature was 1000℃. The tensile strength of the steel is about 640MPa and the yield strength is higher than 255MPa, while the elongation is above 82%. The microstructure is composed of austenitic matrix and annealing twins at room temperature, at the same time, a significant amount of annealing twins and stacking faults are observed by transmission electron microscopy (TEM). Mechanical twins play a dominant role during deformation, and result in excellent mechanical properties.
关键词:
cold rolling reduction
,
rolling
,
reduction
,
annealing
,
tempera
Zhaodong WANG
材料科学技术（英）
The effect of coiling temperatures on the evolution of texture in Ti-IF steel during ferritic hot rolling, cold rolling and annealing was studied. It was found that texture evolution at high temperature coiling is absolutely different from that at low temperature one. The hot band texture includes a strong α-fiber as well as a weak γ-fiber after ferritic hot rolling and low temperature coiling. Both of them intensify after cold rolling and a γ-fiber with peak at {111}<112> is the main texture of annealed samples. However, the main component of the hot band texture after high temperature coiling is γ-fiber. After cold rolling, the intensity of γ texturereduces; α fiber (except {111} <110> component) intensifies and a strong and well-proportioned γ-fiber forms in the annealed samples.
关键词:
Ti-IF steel
,
steel
,
ferritic
,
hot
,
rolling
,
coiling
MAO Weimin ** University of Science and Technology Beijing
,
100083
,
China.
材料科学技术（英）
The influence of widening and initial Cube tex- ture on formation of rolling and recrystallization texture was investigated in high purity Al.With in- creasing widening the initial Cube texture has ro- tated more around rolling direction(RD)and less around transverse direction(TD).Therefore,more orientations rotate in x-fibre between G{110} <001>and B{110}<112>positions,and less in S{124}<211>texture component,which shows the widening plays an important role in the forma- tion of S component during rolling.The relation- ship between rolling and recrystallization texture components is discussed.Though the transition band predicted by Dillamore and Katoh is always formed during rolling,the most important factor in- fluencing recrystallization texture should be the ori- ented growth according to the changes of volume fractions and scatter widths of texture components with widening.
关键词:
texture
,
null
,
null
,
null
宜楠
,
权振兴
,
赵鸿磊
,
武宇
材料开发与应用
金属钽可作为集成电路中铜与硅基板的阻隔层材料,以防止铜与硅扩散生成铜硅合金影响电路性能.采用钽靶材通过物理气相沉积技术溅射钽到硅片上.靶材晶粒尺寸与织构取向影响溅射速率及溅射薄膜均匀性,要求钽靶材晶粒尺寸应小于100 μm,在靶材整个厚度范围内应主要是(111)型织构.同时,为了避免薄膜存在杂质颗粒,要求钽靶材纯度不小于99.99％.本文对钽靶材电子束熔炼、锻造、轧制、热处理等关键工艺进行了系统研究,找到了一种有别于常规钽靶材生产工艺的新方法,所生产产品化学纯度、晶粒尺寸、织构等性能优良,产品成品率高,适于批量化生产.
关键词:
钽
,
溅射靶材
,
晶粒尺寸
,
织构
,
电子束熔炼
,
锻造
,
轧制
,
热处理
苏石哲
,
孙建林
,
禹峰哲
,
贠冰
钢铁研究
为减少中厚板产品缺陷,降低生产能耗,采用Ansys软件进行了轧制前温度场的数值模拟.考虑材料物理特性随温度变化的情况,并采用瞬态过程的处理方法,使数值模拟模型更适合于实际情况并减少计算量,提高了模拟精确度.结果表明:利用该模型对16 Mn钢轧制过程进行数值模拟,其结果与实测数据进行对比,相对误差仅为3.89％.
关键词:
Ansys软件
,
轧制
,
温度场
,
数值分析
许晓静
,
蒋凌
,
陆文俊
,
卢予东
,
费震旦
,
成城
稀有金属材料与工程
采用轧制技术对退火态5052铝合金进行大应变加工,并进行后续200℃/1h、350℃/1 h、500℃/1h的热处理,研究了轧制及热处理对5052铝合金的硬度、拉伸性能和晶体取向的影响.结果表明,轧制可以有效提高5052铝合金的硬度与屈服强度.由于材料在244.8℃时再结晶,350℃/lh和500℃/1 h的后续热处理使5052铝合金的硬度和拉伸性能持续下降.XRD分析得出轧制及后续热处理未能有效调控合金的晶体取向.基于Taylor公式的定量计算说明,轧制变形过程中所引入的位错只是5052铝合金强度提升的因素之一.
关键词:
轧制
,
热处理
,
拉伸性能
,
晶体取向
,
位错强化
