用Gleeble-1500D型热模拟试验机对AZ31镁合金在变形温度为473～723 K,应变速率为0.001～1 s-1下的热变形行为进行了试验研究;用双曲正弦关系式描述了该合金在热变形过程中的稳态流变应力;根据合金动态模型,计算并分析了该合金的加工图.结果表明:利用加工图可确定出该合金热变形的流变失稳区,并且得到试验条件下热变形的最佳工艺参数,即变形温度为473～523 K,应变速率为0.01 s-1左右;当变形温度为623～673 K、应变速率为0.001～0.006 s-1时可进行超塑性加工;当变形温度高于673 K后可在较宽的应变速率范围进行热加工.
参考文献
| [1] | 周海涛,马春江,曾小勤,丁文江.变形镁合金材料的研究进展[J].材料导报,2003(11):16-18,55. |
| [2] | 余琨,黎文献,王日初,马正青.变形镁合金的研究、开发及应用[J].中国有色金属学报,2003(02):277-288. |
| [3] | Bozzini B.;Cerri E. .Numerical reliability of hot working processing maps[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2002(1/2):344-347. |
| [4] | 汪凌云,范永革,黄光杰,黄光胜.镁合金AZ31B的高温塑性变形及加工图[J].中国有色金属学报,2004(07):1068-1072. |
| [5] | C. A. C. Imbert;H. J. McQueen .Peak strength, strain hardening and dynamic restoration of A2 and M2 tool steels in hot deformation[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2001(1/2):88-103. |
| [6] | WANG Qu-dong,LU Yi-zhen,ZENG Xiao-qin,DING Wen-jiang,ZHU Yan-ping.Effects of RE on microstructure and properties of AZ91 magnesium alloy[J].中国有色金属学会会刊(英文版),2000(02):235-239. |
| [7] | Seshacharyulu T.;Medeiros SC.;Frazier WG.;Prasad YVRK. .Microstructural mechanisms during hot working of commercial grade Ti-6Al-4V with lamellar starting structure[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2002(1/2):112-125. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%