An AZ91–0.9Ca–0.6Y–0.5MM (AZXWMM91100) alloy, which has higher corrosion resistance, ignition resistance, and extrudability than a commercial AZ91 alloy, has been developed recently. In this study, the AZXWMM91100 alloy is extruded at various temperatures (300–400 °C) and ram speeds (1–14.5 mm/s), and the cracking behaviors, microstructure, and tensile properties of the extruded materials are systematically analyzed. On the basis of the pressure limit and surface and internal cracking limit, the extrusion limit diagram providing a safe extrusion processing zone is established. All of the materials extruded at temperatures and speeds within the safe extrusion processing zone have high surface quality and moderate tensile ductility with an elongation higher than 10%. Moreover, they have a fully recrystallized grain structure and contain undissolved particle stringers arranged parallel to the extrusion direction. The grain size of the extruded material does not show any relationship with the Zener–Hollomon parameter (Z). However, the yield strength (YS) of the extruded material is inversely proportional to the logarithm of the Z value, and their relationship is expressed as YS = −31.2•log(Z) + 536. These findings may broaden the understanding of the AZXWMM91100 alloy with excellent chemical and physical properties and provide valuable information for the development of high-performance extruded Mg products using this alloy.

最近开发了一种 AZ91–0.9Ca–0.6Y–0.5MM (AZXWMM91100) 合金，它比商用 AZ91 合金具有更高的耐腐蚀性、耐燃性和可挤压性。在这项研究中，AZXWMM91100 合金在不同温度 (300–400 °C) 和冲压速度 (1–14.5 mm/s) 下被挤压，系统地分析了挤压材料的开裂行为、微观结构和拉伸性能。在压力极限和表面和内部裂纹极限的基础上，建立了提供安全挤压加工区的挤压极限图。所有在安全挤压加工区内的温度和速度下挤压的材料都具有良好的表面质量和适中的拉伸延展性，延伸率在10%以上。而且，它们具有完全再结晶的晶粒结构，并包含平行于挤压方向排列的未溶解的颗粒纵梁。挤压材料的晶粒尺寸与 Zener–Hollomon 参数没有任何关系（Z）。然而，挤压材料的屈服强度 (YS) 与Z值的对数成反比，它们的关系表示为 YS = −31.2•log( Z ) + 536。这些发现可能会拓宽对 AZXWMM91100 的理解合金具有优异的化学和物理性能，并为使用该合金开发高性能挤压镁产品提供有价值的信息。