在150,175,200,225,250℃对工业纯镁进行不同道次的往复挤压,用光学显微镜研究了挤压温度和挤压道次对晶粒细化效果的影响。结果表明：150℃是工业纯镁能够进行往复挤压的最低温度;随着挤压温度的升高,工业纯镁的塑性提高,挤压应力下降,但晶粒细化效果有所下降;随着挤压道次增加,晶粒进一步细化;最佳挤压温度为200℃,最佳挤压道次为4次。
Reciprocating extrusion for different passes was carried out for industrial pure magnesiums at 150,175,200,225,250 ℃.The effects of extrusion temperature and passes on grain refinement were studied by optical microscopy.The results show that the minimum temperature for reciprocating extrusion of industrial pure magnesium was 150 ℃.With the increase of extrusion temperature,the plasticity of industrial pure magnesium increased and the extrusion stress decreased,but the grain refinement effect became worse.With the increase of the extrusion passes,the grain size was refined further.The best extrusion temperature was 200 ℃,and the optimal extrusion passes was 4.
参考文献
| [1] | D.C. Foley;M. Al-Maharbi;K.T. Hartwig .Grain refinement vs. crystallographic texture: Mechanical anisotropy in a magnesium alloy[J].Scripta materialia,2011(2):193-196. |
| [2] | 关绍康,王迎新.高温镁合金的研究进展及其在汽车工业中的应用[J].机械工程材料,2003(08):1-4. |
| [3] | Ming-Hung Tsai;May-Show Chen;Ling-Hung Lin .Effect of heat treatment on the microstructures and damping properties of biomedical Mg-Zr alloy[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2011(3):813-819. |
| [4] | 杨光昱,介万奇,郝启堂.Mg-5Zn-3Al-0.2Mn铸造合金的组织和室温力学性能[J].中国有色金属学报,2006(02):205-212. |
| [5] | 郭学锋,杨文朋,宋佩维.往复挤压Mg-4Al-2Si合金的高温拉伸性能[J].中国有色金属学报,2010(06):1032-1038. |
| [6] | M. Mabuchi;H. Iwasaki;K. Yanase;K. Higashi .LOW TEMPERATURE SUPERPLASTICITY IN AN AZ91 MAGNESIUM ALLOY PROCESSED BY ECAE[J].Scripta materialia,1997(6):681-686. |
| [7] | 徐春杰,郭学锋,张忠明,贾树卓,刘礼.往复挤压及正挤压AZ91D镁合金丝材的组织及性能[J].稀有金属材料与工程,2007(03):500-504. |
| [8] | 金文中,刘顺华.镁合金焊丝的热挤压-拉拔工艺及其变形机理[J].材料科学与工艺,2005(05):466-469. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%