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金属罐具有优良的阻隔性、抗压强度、加工适应性和较好的卫生性,印刷精美,携带方便,在食品包装领域已得到广泛应用。本文从金属罐的定义出发,通过介绍金属罐起源到现在的变革,以及列举不同阶段下的金属罐工艺和特性的事例,展示了金属罐的发展过程,说明了金属罐的优缺点,揭示了食品包装用金属罐的重要性;同时指出了食品包装用金属罐的发展重点,为今后食品包装用金属罐的设计和使用指明方向,进而实现食品包装用金属罐的轻量化、个性化。 相似文献
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The microstructures of the cold-swaged and recrystallized Ti-23Nb-0.7Ta-2Zr-O (TNTZO) (mole fraction, %) alloy were investigated by electron backscatter diffraction (EBSD). The difference in microstructure, texture and recrystallization process was evaluated between the TNTZO alloy and traditional body centered cubic (bcc) metals. The results show that the cold-swaged TNTZO alloy presents a pronounced (110) fiber texture in the axial direction. The recrystallization of the TNTZO alloy is achieved by the nucleation of new grains and the growth of these new grains at the expense of the deformed structure. The TNTZO alloy behaves a very similar way to traditional bcc metals in the features of the microstructure, texture and recrystallization. 相似文献
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镍基超合金的Nd-YAG激光熔敷涂层行为研究 总被引:1,自引:0,他引:1
对ЖС6y、К24、К17三种镍基超合金的几种材料的Nd—YAG激光熔敷涂层行为进行了试验研究,并与三种超合金激光重熔行为进行了对比。研究表明,三种镍基超合金的重熔性都很差,热裂纹敏感性高,重熔区出现很多凝固裂纹。几种粉末涂层行为不尽相同,但对超合金基材的裂纹敏感性都有程度不同的改善,大大减少甚至抑制了基村上裂纹的产生,并在其与基材的界面处形成一白亮的熔合区,达到冶金结合。采用某几种钴基合金和镍基合金粉末,可在某种超合金基材上获得高质量无裂纹涂层。 相似文献
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对IF钢板分别进行了模拟连续退火和快速退火,运用EBSD技术对退火钢板的显微组织进行了研究,测试了退火钢板的力学性能,探讨了退火工艺对IF钢显微组织与力学性能的影响。结果表明:与模拟连续退火工艺相比,快速退火工艺使IF钢板晶粒更加细小均匀且同样具有强烈的γ-<111>//ND再结晶织构,但导致IF钢规定非比例延伸强度Rp0.2升高,断后伸长率降低,塑性应变比r90降低。 相似文献
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Ti-Nb-Ta-Zr-O合金冷变形及再结晶组织 总被引:1,自引:0,他引:1
采用电子背散射衍射(EBSD)对Ti-23Nb-0.7Ta-2Zr-1.20(摩尔分数,%)合金的冷旋锻变形组织和退火组织进行了研究.结果表明:Ti-23Nb-0.7Ta-2Zr-1.2O合金的变形组织中包含高密度的小角晶界,合金具有与棒材轴向平行的强烈<110>丝织构;在退火过程中,合金中的小角晶界密度逐渐降低,大角晶界数量逐渐增多并最终成为主要晶界;在退火过程初期,合金中出现了大量细小晶粒,且随着退火时间的增加,这些晶粒逐渐通过消耗变形组织长大,晶粒取向逐渐分散,表明Ti-23Nb-0.7Ta-2Zr-1.2O合金的再结晶通过传统的形核长大机制进行. 相似文献
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The energetic, electronic structure and elastic property offl-type Ti-Xx (X=Nb and Mo, x=0.041 7, 0.062 5, 0.125 0, 0.187 5, 0.250 0, 0.312 5 and 0.375) binary alloys were calculated by the method of supercell and augmented plane waves plus local orbitals within generalized gradient approximation. The elastic moduli of the polycrystals for these Ti1-xXx alloys were calculated from the elastic constants of the single crystal by the Voigt-Reuss-Hill averaging method. Based on the calculated results, the influence of X content on the phase stability and elastic property offl-type Ti1-xXx alloys was investigated. The results show that the phase stability, tetragonal shear constant C, bulk modulus, elastic modulus and shear modulus offl-type Ti1-xXx alloys increase with an increase of X content monotonously. When the valence electron number offl-type Ti1-xXx alloys is around 4.10, i.e. the content of Nb is 9.87% (molar fraction) in the Ti-Nb alloy and Mo is 4.77% (molar fraction) in Ti-Mo alloy, the tetragonal shear constant is nearly zero. The Ti1-xXx alloys achieve low phase stability and low elastic modulus when the tetragonal shear constant reaches nearly zero. In addition, the phase stability offl-type Ti1-xXx alloys was discussed together with the calculated electronic structure. 相似文献
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介绍了近年来低模量高强度钛合金的成分选择、设计方法及研究进展,讨论了合金元素添加量对合金力学性能的影响,并对这种低模量高强度钛合金的应用前景作出了展望。 相似文献