镁及镁合金的特性与挤压工艺特点

简略地介绍了镁及镁合金的基本特性之后,详细地论述了镁及镁合金的挤压特点及其与铝合金挤压的主要区别,例举了大量的热挤压工艺的参数实例,有一定的参考价值。     

富镁软锰矿中镁的预脱除实验研究

河北省唐山迁西地区的软锰矿成分复杂,含有较高的镁含量,必须将镁去除才可进行后续利用。该实验采用在软锰矿浸锰流程之前,对于其中的镁进行预脱除。实验结果表明:在最优条件下,该方法的脱镁率可以达到78%以上。脱镁处理后的软锰矿浸锰实验结果表明:镁脱除后的软锰矿的Mn浸出率未受到影响,Mn/Mg大幅提高,而且浸出过程中的酸耗降为脱镁处理后的1/2,具有较好的工业推广价值。     

镁及镁合金材料的应用及市场开拓前景

介绍了镁及镁合金材料在交通运输、航空航天、电子工业、核能工业、化工冶金等部门的应用方向与实例，指出镁合金是一种很有发展前景的新型金属材料，其加工技术将获得进一步的快速发展。     

Plastic Work to Heat Conversion During High-Strain Rate Deformation of Mg and Mg Alloy

Magnesium and magnesium alloy were investigated for plastic work to heat conversion (β). Thermomechanical response was measured employing the shear-compression specimen geometry, a split-Hopkinson pressure bar, and an infra-red detector. β of both materials measured to be less than the common assumption of 0.9; however, heat conversion was observed to be greater for magnesium alloy. Thus, results suggest that alloying and grain size refinement not only improved yield strength but also affected the thermomechanical response.     

喷镁铁水脱硫中提高镁利用率的研究

本文讨论铁水喷吹镁粉脱硫时影响镁利用率的因素,提出了提高镁利用率的途径。     

铝合金中镁的快速测定

本文介绍的铝合金中镁的快速测定是不需分离，采用DDTC、盐酸羟胺、三乙醇胺联合掩蔽剂掩蔽大量的铝及铜、铁、锰离子，在PH10以铬黑T为指示剂，用EDTA滴至溶液由紫红色变为纯蓝色为终点。方法简单、快速、准确度高，适合于铝合金中各种镁含量的测定．     

Mechanical Properties of Gradient Structure Mg Alloy

In this work, a surface mechanical attrition treatment (SMAT) process was applied to AZ31B magnesium alloy at room temperature. This method produced a gradient structure on the treated AZ31B, in which the grains of the topmost layer are refined to nanoscale sizes. A combination of nanocrystallites at the surface and coarse-grains in the center are the main features of this structure. This structure results in an excellent combination of both strength and ductility. The highest yield strength for the 30 minutes SMAT AZ31B samples increased to 249 ± 5 MPa and the uniform elongation decreased to 9.3 ± 0.8 pct, whereas the original yield strength was only 147 ± 4 MPa and the uniform elongation was 15.4 ± 1.1 pct. Microstructural observations, stress relaxation tests, and hardness tests were used to verify the results. Additionally, there is a specific volume fraction of gradient structure to achieve the best mechanical performance, which is shown to be in the range of 9.3 to 14 pct for the AZ31B alloy.