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发明授权
CN102127669B 高强韧耐热耐蚀稀土镁合金及其制备方法 有权 转让

高强韧耐热耐蚀稀土镁合金及其制备方法
摘要：
一种高强韧耐热耐蚀稀土镁合金及其制备方法，属于轻金属材料技术领域。其成份的重量百分配比为：3-5%的铝（Al），0.1-0.4%的锰（Mn），0.8-2.5%的钇（Y），0.3-1.0%的锑（Sb），0.3-1%的镉（Cd），其余为镁（Mg）。优点：消除了合金组织中因粗大Al2Y相对基体的割裂作用而引起的力学性能的降低，充分利用Sb和Y等元素的固溶强化作用、细晶强化作用和高熔点YSb颗粒相质点的弥散强化作用来提高合金的强韧性和室温及高温力学性能；利用元素Cd的晶粒细化作用和固溶强化作用，进一步提高合金的力学性能，利用Cd提高合金基体的电极电位从而提高合金的耐性性能，使合金的强韧性、耐热性能和耐蚀性能均高于现有的AE系镁合金；提供的制备方法的工艺要求不苛刻，能满足工业化放大生产要求，并且能保障前述的两点技术效果的全面体现。
摘要（英）：

The invention provides a heatproof and anticorrosion rare earth magnesium alloy with high obdurability and a preparation method thereof, belonging to the technical field of light metal material. The rare earth magnesium alloy comprises the following components in proportion by weight: 3-5% of aluminum (Al), 0.1-0.4% of manganese (Mn), 0.8-2.5% of yttrium (Y), 0.3-1.0% of stibium (Sb), 0.3-1% of cadmium (Cd) and balance of magnesium (Mg). The invention has the advantages of solving the problem of reduction of mechanical properties caused by the splitting effect of a bulky Al2Y relative matrix in the alloy structure, improving the obdurability of the alloy and the mechanical properties of the alloy under room temperature and high temperature by making the most of the solution strengthening effect and refined crystalline strengthening effect of the Sb, Y and other elements and the dispersion strengthening effect of the high melting point YSb particle phase mass points, further improving the mechanical properties of the alloy by the grain refinement effect and the solution strengthening effect of the Cd element, and improving the anticorrosion performance of the alloy by improving theelectrode potential of the alloy matrix by the Cd element, so that the obdurability, heatproof performance and anticorrosion performance of the alloy are higher than that of the existing AE series magnesium alloy. The technological requirements for the preparation method provided by the invention are not harsh, and the preparation method can meet the industrialized enlarged production requirements and ensure thorough embodiment of the two technical effects.

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