为了制备晶粒细小且球化程度高的的AM60镁合金半固态坯料,对铸态和等径道角挤压态的AM60镁合金半固态等温处理过程进行了研究.借助金相显微镜对AM60镁合金铸坯和等径道角挤压后的铸坯在半固态等温处理中的微观组织演变进行了观察.研究结果表明:对于AM60镁合金,直接等温处理获得的半固坯晶粒很粗大,其平均晶粒尺寸都在100μm以上,晶粒球化效果不理想,很难获得合格的半固态坯;新SIMA法是一种非常理想制备AM60镁合金半固态坯的方法,利用该方法制备的AM60半固态坯的微观组织晶粒十分细小,平均晶粒尺寸在8～22μm,晶粒球化程度高;随着保温时间的延长,新SIMA法制备的AM60半固态坯的微观组织出现长大现象;随着等温处理温度的升高,固相晶粒的平均尺寸先增加后减小,晶粒球化程度越来越高.
参考文献
| [1] | Yucel Birol .Cooling slope casting and thixoforming of hypereutectic A390 alloy[J].Journal of Materials Processing Technology,2008(1/3):200-203. |
| [2] | J.G. Wang;H.Q. Lin;H.Y. Wang .Effects of different processing parameters on the semisolid microstructure of the AZ91D alloy during partial remelting[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2008(1/2):98-105. |
| [3] | Yucel Birol .Comparison of thixoformability of AA6082 reheated from the as-cast and extruded states[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2008(1/2):132-138. |
| [4] | 罗守靖,姜巨福,杜之明.半固态金属成形研究的新进展、工业应用及其思考[J].机械工程学报,2003(11):52-60. |
| [5] | Hanlin Ding;Liufa Liu;Shigeharu Kamado .Study of the microstructure, texture and tensile properties of as-extruded AZ91 magnesium alloy[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2008(1/2):400-406. |
| [6] | A. V. Nagasekhar;Yip Tick-Hon;H. P. Seow .Deformation behavior and strain homogeneity in equal channel angular extrusion/pressing[J].Journal of Materials Processing Technology,2007(0):449-452. |
| [7] | J.-H. Lee;I.-H. Son;Y.-T. Im .Design guideline of multi-pass equal channel angular extrusion for uniform strain distribution[J].Journal of Materials Processing Technology,2007(1/3):39-43. |
| [8] | K. Mueller;S. Mueller .Severe plastic deformation of the magnesium alloy AZ31[J].Journal of Materials Processing Technology,2007(0):775-779. |
| [9] | 姜巨福,王迎,罗守靖,邹经湘,孙毅.AZ91D镁合金托弹板半固态触变模锻研究[J].材料科学与工艺,2007(05):658-661. |
| [10] | JIANG Ju-fu;LUO Shou-jing .Preparation of semi-solid billet of magnesium alloy and its thixoforming[J].Transactions of Nonferrous Metals Society of China,2007(1):46-50. |
| [11] | 姜巨福,罗守靖,王迎.等径道角挤压AZ91D镁合金的半固态组织演变[J].中国有色金属学报,2004(05):752-758. |
| [12] | Jufu Jiang;Ying Wang;Shoujing Luo .Application of equal channel angular extrusion to semi-solid processing of magnesium alloy[J].Materials Characterization,2007(2):190-196. |
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