共查询到17条相似文献,搜索用时 76 毫秒
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耐热镁合金研究应用现状及强化机制 总被引:1,自引:0,他引:1
综述了RE、Ca、Si和Bi等合金元素对镁合金高温性能的影响。介绍了耐热镁合金在汽车、动力系统、航空航天及军事等领域的应用。讨论了耐热镁合金的几种强化方法,包括沉淀强化、固溶强化、细晶强化、复合强化。指出了开发耐热镁合金应注意的问题。 相似文献
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耐热铸造镁合金的研究现状及其发展趋势 总被引:1,自引:0,他引:1
耐热铸造镁合金在航空航天以及汽车工业等领域得到了广泛应用。本文主要介绍了Mg-Al系、Mg-Zn系和Mg—RE系耐热铸造镁合金的研究现状;对新型高性能耐热镁合金的发展趋势提出了一些见解,指出,合金化方法作为解决镁合金高温性能不足的最有效的手段之一,应该进一步通过优化合金元素组合,进行有效的合金设计,解决铸造镁合金在耐高温、抗蠕变等方面存在的问题。 相似文献
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耐热镁合金的研究现状与发展方向 总被引:45,自引:0,他引:45
介绍了耐热镁合金的研究现状。Cu,Ca,Sc,Sr和稀土元素合金化可以改善镁合金的耐热性能。合金化、挤压和半固态加工等热塑性变形技术能促使镁晶胞中的棱柱面(1010^-)和棱锥面(1011^-)参与滑移,提高该类镁合金的力学性能。超塑成型技术是制备高性能耐热镁合金部件的有效途径 相似文献
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综述了耐热镁合金的研究与进展情况,简单介绍了镁合金的蠕变特点,总结了镁合金耐热性能的改善方法并指出了汽车用耐热镁合金的发展方向. 相似文献
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The global trend toward decreasing of atmospheric pollution, by saving fuel consumption in vehicles, has led to extensive interest of using lightweight metals such as magnesium alloys, in engine and cooling system components. The modern coolant is not intended to prevent corrosion of magnesium alloy in the engine cooling systems. We have developed a new coolant that aims to protect Mg alloy parts together with all other commonly used metals. Several inhibitor formulations were tested, according to glassware test (ASTM D1384) and heat transfer conditions (ASTM D4340). Mg alloys EZ33 and WE43 were added to the standard sets of metals and the corrosivity of different types of formulations was determined by weight loss measurements. The new anticorrosive coolant showed high performance in all tested metals including magnesium alloys and it satisfied the requirements (ASTM D3306). Cyclic potentiodynamic polarization curves have been used to study electrochemical corrosion behavior of the magnesium alloys EZ33 and WE43 in aqueous solution containing the inhibitors and ethylene glycol (33 vol%‐EG prepared with corrosive water according to ASTM D1384) and compared to a reference coolant with no inhibitor. It was found that a passive film was created upon the Mg alloys, which exhibited high corrosion resistance against pitting. 相似文献
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稀(碱)土在镁合金中的作用及应用现状 总被引:7,自引:0,他引:7
结合我国富有资源稀土和碱土,介绍了稀土和碱土在镁合金中的作用和影响,概括了它们在Mg-A1系耐热镁合金中的应用现状,以及在研制汽车用耐热镁合金中所发挥的重要作用。指出研究开发稀(碱)土耐热镁合金将是汽车用高性能镁合金材料的重要研究方向。 相似文献
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1 Introduction The heat-treatable Al-Mg-Si-Cu(6000 series) alloys used as automotive body sheet materials are being brought to practical use more and more in North American and Europe, and becoming optimal materials caused by mass reduction of automotive … 相似文献
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Sn对镁合金显微组织和力学性能的影响 总被引:79,自引:10,他引:69
研究了Sn对镁合金显微组织和力学性能的影响。研究结果表明,纯镁中加入Sn后能使纯镁铸锭中粗大的柱状晶转化为均匀的等轴晶,并有效地细化晶粒,同时在显微组织中形成具有立方C1结构的Mg2Sn颗粒相。由于Mg2Sn颗粒相显微硬度和熔点高,热稳定性好,因而对基体具有有效的弥散强化作用,提高了MgSn二元合金的室温及高温强度。在Mg9Al0.8Zn基合金中加入少量的Sn便能有效地提高合金的耐热性,而加入过多的Sn反而会导致合金高温强度下降。 相似文献