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下面对各种高强度合金的应用特点和范围作一简单叙述。 铝-铜合金 LM11合金由于在固溶体中含有4～5％Cu和晶界没有脆裂相,所以具有高的强度及塑性。LM11合金可以视作单相的,如果它未含有Fe和Si等杂质的话;而且其中每种杂质的含量一般都不超过0.15％。当进行相应的热处理时,进一步降低Si和Fe的含量及稍微增加Cu含量(超过5％),便可大大提高合金的强度和塑性。 合金中加入少量的Cd,便能降低相对延伸率而显著提高强度。LM11合金具有生成热裂纹的倾向,因而限制了它的使用,只能制
Below a variety of high-strength alloy characteristics and scope of the application for a brief description. Aluminum - copper alloy LM11 alloy has 4 ~ 5% Cu in the solid solution and the grain boundary has no brittle fracture phase, so it has high strength and plasticity. LM11 alloy can be considered as a single phase, if it does not contain impurities such as Fe and Si; and the content of each of these impurities are generally not more than 0.15%. When the corresponding heat treatment, to further reduce the Si and Fe content and a slight increase in Cu content (more than 5%), can greatly improve the strength and ductility of the alloy. Adding a small amount of Cd into the alloy reduces the relative elongation and significantly increases the strength. LM11 alloy has the tendency to generate hot cracks, thus limiting its use, only system