挤压工艺对AZ80NC可溶镁合金组织和性能的影响

doi:10.13251/j.issn.0254-6051.2025.03.006

金属热处理 ›› 2025, Vol. 50 ›› Issue (3): 38-43.DOI: 10.13251/j.issn.0254-6051.2025.03.006

挤压工艺对AZ80NC可溶镁合金组织和性能的影响

周晓舟, 孟利, 徐江杰, 张宁, 涂杨, 傅超, 杨勇

钢铁研究总院有限公司冶金工艺研究所, 北京 100081

收稿日期:2024-11-15 修回日期:2025-01-28 出版日期:2025-03-25 发布日期:2025-05-14
作者简介:周晓舟(1990—),男,工程师,博士,主要研究方向为金属材料设计和开发,E-mail:zhouxiaozhou@cisri.com.cn
基金资助:
钢铁研究总院有限公司自主投入研发专项基金(事23160400Z)

Effect of extrusion process on microstructure and properties of AZ80NC degradable magnesium alloy

Zhou Xiaozhou, Meng Li, Xu Jiangjie, Zhang Ning, Tu Yang, Fu Chao, Yang Yong

Metallurgical Technology Institute, Central Iron and Steel Research Institute Co., Ltd., Beijing 100081, China

Received:2024-11-15 Revised:2025-01-28 Online:2025-03-25 Published:2025-05-14

摘要/Abstract

摘要： 研究了挤压温度和挤压速度对AZ80NC可溶镁合金微观组织、力学性能和溶解性能的影响。结果表明,铸态AZ80NC合金组织由α-Mg基体和β-Mg₁₇Al₁₂、MgAlNi、MgAlCu第二相组成。在300 ℃以上热挤压时,AZ80NC合金挤压棒材发生了完全动态再结晶,其显微组织为等轴晶粒;在低温和低挤压速度挤压时,AZ80NC合金挤压棒材边部发生不完全再结晶,形成双峰晶粒组织。随着挤压温度和挤压速度的降低,AZ80NC合金屈服强度、抗拉强度逐渐升高,伸长率、腐蚀速率逐渐降低。但在低温和低应变速度挤压时形成双峰晶粒组织后,合金同时具有高的强度和塑性,合金的腐蚀速率也较大,最大可达31.18 mg/(cm²·h)。

关键词: 可溶镁合金, 挤压工艺, 力学性能, 溶解性能

Abstract: Effects of extrusion temperature and speed on microstructure, mechanical properties and dissolution properties of the AZ80NC degradable magnesium alloy were investigated. The results show that the as-cast microstructure of the AZ80NC alloy consists of α-Mg matrix and secondary phases including β-Mg₁₇Al₁₂, MgAlNi and MgAlCu. During hot extrusion at temperatures above 300 ℃, complete dynamic recrystallization occurs in the extruded rods of the AZ80NC alloy, resulting in an equiaxed grain microstructure. Under low temperature and low strain rate extrusion, partial recrystallization occurs at the edges of the extruded rods, forming a bimodal grain microstructure. As the extrusion temperature and extrusion rate decrease, the yield strength and tensile strength of the AZ80NC alloy gradually increase, while the elongation and corrosion rate decrease. However, when a bimodal grain microstructure is formed under low temperature and low strain rate extrusion, the alloy exhibits both high strength and high ductility, with higher corrosion rate reaching a maximum of 31.18 mg/(cm²·h).

Key words: degradable magnesium alloy, extrusion process, mechanical properties, dissolution properties

中图分类号:

周晓舟, 孟利, 徐江杰, 张宁, 涂杨, 傅超, 杨勇. 挤压工艺对AZ80NC可溶镁合金组织和性能的影响[J]. 金属热处理, 2025, 50(3): 38-43.

Zhou Xiaozhou, Meng Li, Xu Jiangjie, Zhang Ning, Tu Yang, Fu Chao, Yang Yong. Effect of extrusion process on microstructure and properties of AZ80NC degradable magnesium alloy[J]. Heat Treatment of Metals, 2025, 50(3): 38-43.

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挤压工艺对AZ80NC可溶镁合金组织和性能的影响

Effect of extrusion process on microstructure and properties of AZ80NC degradable magnesium alloy

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