轧制钛-钢复合板工艺综述

从轧制钛-钢复合板生产工艺的各工序入手,概述了钛-钢复合板生产的原料准备,隔离材料的选择及应用方法,组料前待贴合面的处理,主要的组料方式,加工温度的确定,压下制度的确定,轧后冷却制度的确定,热处理温度的选择,以及矫平处理等在近几十年的发展,归纳了轧制方法生产钛-钢复合板的优缺点.     

采用自蔓延高温合成法（SHS）生产钛铝熔接棒

美国矿业局阿尔巴勒研究中心(ALRC)正在研究的钛铝化合物具有重量轻和突出的热强性能,是喷气式发动机和涡轮发动机部件的理想材料,也可作为汽车和柴油机排气阀材料.     

Ti-1023合金铸锭铁偏析控制

在工业化生产条件下,分析并阐述了Ti-1023合金铁组元偏析的特点及其影响因素,探索了铁偏析规律,提出了控制铁偏析的措施。     

带夹层材料的爆炸-轧制钛钢复合板工艺研究

为扩大钛-钢复合板的尺寸,采用一种新颖的组料方式,这种方法包括两个主要步骤,首先用爆炸焊接的方式将DT4夹层与钛板结合,然后按照对称方式组坯。研究轧制温度、退火温度对复合板剪切强度的影响。利用扫描电镜、光学显微镜和显微硬度试验机对复合板的微观组织和界面附近硬度进行分析。结果表明:复合板的结合强度取决于轧制温度和轧后退火温度,当轧制温度超过钛的α→β相变温度,并且退火温度超过750℃时,Ti/DT4界面脆性化合物明显增多,剪切强度显著降低;当退火温度超过900℃,Fe在钛中扩散速度快,显微硬度的峰值在钛侧出现;在550～650℃退火,复合板的结合强度略有升高。     

Influence of Sc on high temperature strengthening behavior of Ti-6A1-4V alloy

Vacuum arc melting technique was used to prepare Ti-6A14V alloy containing Sc （0.3% and 0.5%, mass fraction）. The ingots were melted twice by vacuum self-consumable electrode arc furnace. Forging of ingots was started in β-phase region and finished in high （a＋β-phase region. Annealing after forging was performed in low （a＋β）-phase region for 30 min. Isothermal high temperature compression tests were conducted using thermal simulation machine under Ar atmosphere at 850℃ and 1 000 ℃, and the strain rate were 0.001, 0.01, 0.1 and 1.0 s^-1. Optical microscope（OM）, scanning electron microscopy（SEM）, energy dispersive spectrum（EDS） and transmission electron microscope（TEM） were used to study the microstructure evolution during high temperature deformation. The results show that, the peak stress value of alloys increases with increasing Sc content after deformation at 850℃, however, there is no obvious strengthening of Sc when the alloys are deformed at 1 000 ~C. Sc exists as Sc203 forms by internal oxidation during forging procedure, only minor Sc solutes in matrix. At 850 ~C, the interaction between dislocation and participated particles and twinning mechanism controls the deformation procedure accompanied recrystallization. At 1 000 ℃, the deformation of alloys containing Sc is mainly controlled by twinning, while the deformation of alloy without Sc is not only controlled by twinning, but also the interaction between dislocation and precipitated particles inside the twinning lamellar.     

大直径厚壁钛管

随着钛设备制造业的发展,钛制搅拌机在化工领域的应用日益扩大,从而需要多种规格的大直径厚壁钛管作空心轴,例如300mm×43mm×1700mm的厚壁管。管材生产的传统方法是挤压和轧制,若按传统方法生产这种大直径厚壁管需用大型挤压机。在没有大型挤压机的     

TC4钛合金厚板的组织与性能

对新研制的TC4半成品厚板的组织、拉伸性能、断裂韧性、疲劳性能进行了分析,指出厚板生产中的制坯工艺、轧制道次间的变形量控制及退火工艺控制是获得优良组织性能板材的关键.     

Ti-6Al-4V厚板研制

研究了锻造工艺、热轧工艺对Ti-6Al-4V合金40 mm厚板力学性能、显微组织和超声检验的影响.结果表明采用多火次锻造-两相区大加工率轧制工艺可生产出各项技术指标符合XJ/BS5154规范要求的厚板,且质量水平与美国同类产品相当.     

Ti-15-3板材供应状态与超塑成形性能

对Ti-15-3板材的供应状态、组织、应变速率、流变应力、温度等对超塑成形的影响进行了研究.     

改进增强颗粒加入方式对喷射共沉积6066Al/SiCp组织性能的影响

应用喷射共沉积技术制备了 6 0 6 6 Al/Si Cp复合材料 ,用金相和扫描电镜观察显微组织 ,测试了材料的力学性　　能 ,并研究了增强颗粒加入方式对材料组织均匀性及力学性能的影响