排序方式: 共有78条查询结果,搜索用时 15 毫秒
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开孔泡沫金属的结构特性及流体透过性能的研究 总被引:1,自引:0,他引:1
依据渗流铸造法制得的开孔泡沫铝合金制品,用灌注石蜡的办法,测试分析了开孔泡沫金属的结构特性,分别计算了各被测试样的孔隙率和通孔率;用自行设计的试验装置,测试研究了泡沫金属的流体透过性能。结果表明:开孔泡沫铝合金具有较高的孔隙率、通孔率和流体透过性能。因此,适合应用在工业中的许多领域。 相似文献
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Based on a series of experiments, the theory of relationship between normal pressure and pores' characters fit for polymer was set up for the first time. On the study of relation between normal pressure and porosity, experience model of polyimide porous materials was proposed which is similar to the traditional expe- rience model of the metal porous material. While being pressed, polyimide was found soon to come into elasto- plastic deformation progress in this paper, so the theory model of metal porous material based on Hooker's law was not fit for the polymer any more. A new elasto-plastic deformation and exhausting model is proposed which shows better agreement with polymer material's pressing process. 相似文献
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采用铜模浇铸法成功制备快凝块体镁合金,并对铸态镁合金和快凝镁合金的组织结构和准静态力学性能进行对比研究。结果表明,快速冷却技术使得镁合金的显微组织得到有效细化,"相的形态由铸态合金中的连续网状转变为非连续细小粒状;快凝镁合金的压缩断裂强度高达494MPa,比铸态镁合金提高77%。 相似文献
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40CrNiMoA钢的等效回火方程式与计算图 总被引:3,自引:1,他引:2
本文找出40CrNiMoA钢的回火硬度与回火温度及回火时间之间的关系,以回归分析法提出其间关系的数学方程式并绘制计算图,并探讨了回火方程式的物理意义。该法比Hollomon回火参量方程P=T(c+1gτ)更为精确。 相似文献
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