Establishment of multi-scale structural controlling process technology aiming to high performance common magnesium alloys

高性能普通镁合金多尺度组织控制工艺技术的建立

• 批准号: 22246094
• 负责人: KAMADO Shigeharu
• 金额: $ 31.87万
• 依托单位: Nagaoka University of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 2010
• 资助国家: 日本
• 起止时间: 2010 至 2012
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-22246094/
• 关键词: 汎用型マグネシウム合金; 塑性加工; 熱処理; ミクロ組織; ナノ析出物; 動的再結晶; 機械的性質; 集合組織

We aim to improve the mechanical properties by an application of multi-scale microstructural control to mainly heat treatable common Mg-Al-Ca-Mn alloys. Extraordinary high-strength common Mg alloy is obtained only by hot extrusion using a DC cast sample of the Mg-Al-Ca-Mn alloy with a large amount of alloying elements at low temperature under a low ram speed of 0.1 mm s-1. Namely, the extruded sample exhibits high tensile proof stresses more than 400MPa and rotational bending fatigue strength of240MPa whose values are superior to that of extra-super-duralmin. The high strengths are attributed to the combined results of fine DRXed grains pinned by finely fragmented Al-Ca compounds, nano-scale plate-like Al-Ca and spherical Al-Mn-Ca precipitates, and a strong basal texture at the unrecrystallized regions.Furthermore, we could carry out high speed extrusion of 60 m/min by using the dilute Mg-Al-Ca-Mn with no crystallized compounds at grain boundaries. The extrusion speed is comparable to that for 6063 Al window sash. In matrix of the extruded sample ordered GP zones also precipitate by T5 treatment after the extrusion, resulting in tensile properties being almost equal to T5-treated 6N01Al alloys, which are practically applied to a double skin outer panel of Shinkansen.

我们的目标是通过对主要可热处理的普通Mg-Al-Ca-Mn合金应用多尺度显微组织控制来改善其机械性能。采用含有大量合金元素的Mg-Al-Ca-Mn合金直流铸造试样，在0.1mm·s-1的低速下，通过低温热挤压，获得了超高强度的普通镁合金。挤压试样的抗拉强度超过400 MPa，抗弯疲劳强度达到240 MPa，均优于超高强钢的上级水平。高强度是由于细颗粒Al-Ca化合物钉扎的细晶粒、纳米尺度的片状Al-Ca和球形Al-Mn-Ca析出相以及未再结晶区强的基面织构共同作用的结果，此外，采用晶界无结晶化合物的稀Mg-Al-Ca-Mn合金可以进行60 m/min的高速挤压。挤压速度与6063铝合金窗扇相当。在挤压试样的基体中，也通过挤压后的T5处理析出有序的GP区，导致拉伸性能几乎等于T5处理的6 N 01 Al合金，其实际上应用于新干线的双层蒙皮外板。

项目成果

Mg-Al-Ca-Mn系希薄合金高速押出し材のミクロ組織と機械的性質

Mg-Al-Ca-Mn稀合金高速挤压材料的显微组织与力学性能

• 发表时间: 2011
• 作者: 目崎達也;徐世偉;本間智之;鎌土重晴;高橋泰;花木悟
• 通讯作者: 花木悟

Development of New Wrought Magnesium Alloy with Ordered GP Zone (Invited lecture)

有序GP区新型变形镁合金的开发（特邀报告）

• 发表时间: 2010
• 作者: S.Kamado;S.W.Xu;T.Honma
• 通讯作者: T.Honma

Microstructure evolution of as-cast Mg-Al-Ca-Mn alloy by hot extrusion

热挤压铸态 Mg-Al-Ca-Mn 合金显微组织演变

• 发表时间: 2012
• 期刊: Proc. 9th International Conference on Magnesium Alloys and their Applications
• 作者: Tomohiro Sasaki;Yusuke Hosokawa;K. Oh-ishi
• 通讯作者: K. Oh-ishi

マグネシウム合金材料、エアコン用圧縮機及びマグネシウム合金部材の製造方法

镁合金材料、空调压缩机及镁合金零件的制造方法

• 发表时间: 2010

Mg-Al-Ca-Mn均質化処理材の高温押出し

Mg-Al-Ca-Mn均质材料的高温挤压

• 发表时间: 2012
• 作者: 徐世偉、高橋広樹、大石敬一郎、鎌土重晴、平渡末二、清水和紀;花木悟
• 通讯作者: 花木悟