共查询到19条相似文献,搜索用时 171 毫秒
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改善5052合金软状态板材深冲性能的工艺革新 总被引:2,自引:0,他引:2
介绍5052铝合金软状态板材在深冲加工过程中存在的问题,分析了深冲过程中产生裂纹的原因,通过试验制定了合理的工艺制度,生产出了用户满意的板材。 相似文献
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提出了制备γ-TiAl/Ti合金复合板材的技术思想.采用包套轧制技术在1150 ℃轧制出厚度为3 mm的Ti-43Al- 9V-0.3Y/Ti-6Al-4V复合板材,其中Ti-43Al-9V-0.3Y合金层的厚度约为2.3 mm,Ti-6Al-4V合金层的厚度约为0.7 mm.复合板材的总变形量为80%.包套轧制后板材外形完整、无应力开裂.分析表明,复合板材的界面相主要由α2-Ti3Al构成.拉伸性能测试结果表明,随着Ti-6Al-4V合金层厚度的增加,复合板材室温下的抗拉强度、延伸率都得到了显著的提高.当Ti-6Al-4V合金层厚度达到0.7 mm时(板材总厚2 mm),室温强度和延伸率分别超过800 MPa和4%,700 ℃条件下延伸率超过25%. 相似文献
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熔体发泡法批量制备泡沫铝板材关键技术的研究 总被引:2,自引:0,他引:2
采用熔体发泡工艺,实现了A356合金500 mm×1000 mm×X不同厚度泡沫铝板材的批量制备.对该工艺方法的増粘、发泡剂加入,泡沫均匀性控制等关键技术进行了系统研究.获得了工厂条件下A356合金泡沫铝块体和板材的优化制备工艺参数.对欠、过发泡,中心大孔,裂纹等缺陷的产生原因进行分析,提出了解决方法. 相似文献
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砂型低压铸造铸件充型及凝固过程的研究 总被引:2,自引:1,他引:1
采用低压铸造法浇注了壁厚为10mm与25mm的ZL114A平板件,通过测定其温度场研究了低压铸造条件下铸件的充型与凝固特点。结果表明,对于25mm平板件,凝固过程中板内从升液管口至铸件远端形成了较大的温度梯度,能够实现典型的顺序凝固,压力通过升液管可始终作用于凝固补缩过程;对于10mm平板件,其凝固速度较快,铸件整体倾向于同时凝固,补缩主要通过浇注系统在局部位置进行。对于10mm与25mm平板件,40mm/s的充型速度均能实现平稳充型与顺序充填。 相似文献
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This study evaluates the numerical modeling of stress corrosion cracks from the viewpoint of eddy current simulations. Five stress corrosion cracks are artificially introduced into austenitic stainless steel plates measuring 25 mm in thickness, and then eddy current inspections are conducted to gather eddy current signals and destructive tests performed to confirm the true profiles of the cracks. The cracks are carefully introduced so as not to cluster, and the data obtained enables discussion of the modeling of a single crack quantitatively. Subsequent numerical simulations model each crack as a rectangular region with a fixed width and uniform conductivity, and evaluate the equivalent width and conductivity suitable for modeling the crack. The evaluation reveals that it is not reasonable to correlate the size of a crack and only its width or conductivity, and larger cracks tend to have greater resistance, which is defined as the width divided by conductivity. Furthermore, the values of width and conductivity depend also on the exciting frequency and probe used; however, the resistance remains almost unchanged by the experimental condition. 相似文献
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Cai-he FAN Dong-sheng ZHENG Xi-hong CHEN Jian-jun YANG Yong LIU Hui-zhong LI 《中国有色金属学会会刊》2019,29(2):263-269
Transmission electron microscopy (TEM), electron backscattered diffraction imaging (EBSD) and X-ray diffractometry were used to analyze the microstructure and texture characteristics of Al?9.8Mg?1.5Li?0.4Mn alloy cross-rolled and extruded plates, and the tensile properties and deep drawing performance were measured. The results show that the occurrence of dynamic recrystallization was promoted, the grains were refined and the preferred orientation of the recrystallized grains was improved by large strain cross rolling. Compared with CBA and CCB rolling methods, CBB rolling method significantly reduced the orientation density of the typical Brass texture {110}〈112〉 in the extruded plates. The orientation densities of Copper texture {112}〈111〉 and Brass texture {110}〈112〉 on the β orientation line in the CBB rolled plates were the lowest, and there were no typical texture features in the plates. Meanwhile, better deep drawing could be gained in the CBB rolled plates, and the mechanical properties of the 0°, 45° and 90° directions were basically the same. The tensile strength, yield strength and elongation at room temperature for the CBB rolled plates were 617 MPa, 523 MPa and over 20.1%, respectively. The deviation of the mechanical properties at different directions was less than 3%. 相似文献
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采用回填式搅拌摩擦点焊技术对2 mm厚5052-H112与2024-T4铝合金进行了成功的连接.试验结果表明,当焊接工艺参数选择恰当时,可得到无缺陷接头;然而,焊接工艺窗口较窄,在高热输入条件下易产生多种缺陷,如粘连韧带、孔洞、裂纹、弱连接等,且这些缺陷主要分布在两板的结合面及焊具退出工件的退出线上;力学性能测试结果表明在低热输入条件下,接头的力学性能(一字拉伸与十字拉伸)最高,这与焊点在低热输入情况下组织缺陷较少有关;在一字和十字拉伸载荷作用下,接头的失效位置位于两板结合面及退出线上,在结合面处形成了有效的冶金连接. 相似文献
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随着世界航空市场趋好,钛及钛合金中厚板的需求旺盛,采用传统的火焰切割方式切割钛及钛合金已无法满足航空工业的需求。进行了钛及钛合金中厚板水刀切割实验。结果表明,水压、沙流量和切割速率是影响钛及钛合金中厚板切割质量的主要因素;Ti-6A1-4V合金中厚板切割水压应控制在372.3-393.0MPa,沙流量应控制在0.681kg/min,切割速率根据板材的厚度分别控制在10—20mm厚为260mm/min,20-30mm厚为145mm/min,30.40厚为96mm/min,40—50mm厚为65mm/min,50—60mm厚为48mm/min;TA2,TA7.Ti-1023合金视其硬度大小确定切割速率,与Ti-6A1—4V合金切割速率比分别为1.4,1.2,0.8。经济效益对比分析结果表明,水刀切割钛及钛合金中厚板的费用仅为火焰切割费用的1,3左右,水刀切割所耗时间为火焰切割的1/5左右。 相似文献