快速气压胀形是一种源自超塑性气压胀形的新成形技术，为获得AZ80镁合金板材的快速气压胀形成形性能，以挤压－冷轧加工的AZ80镁合金板材为研究对象，采用半球件自由胀形实验研究了1．0 mm厚板材在250～400℃和0．4～1．6 MPa下的快速气压胀形能力，分析了半球件和盒形件的壁厚分布规律，并对快速气压胀形过程的断裂模式进行了研究．研究结果表明，AZ80镁合金板材在350℃下具有良好的快速气压胀形能力，在350℃、0．8 MPa下的胀形高度可达38 mm，高径比达到0．95，并得到胀破高度、胀形高度与胀形时间之间的关系．在此基础上，进行了1．2 mm厚板材的盒形件快速气压胀形实验，得到高20 mm的轮廓清晰、表面质量良好的胀形件．
Quick gas blow forming ( QGBF) is a new forming technology derived from super plastic gas blow forming. This paper is to investigate the QGBF formability of 1. 0 mm thick extrude?rolled AZ80 magnesium alloy sheet. The AZ80 magnesium alloy sheet was formed at 250~400 ℃ under 0.4~1.6 MPa to achieve a semi?sphere shape. The experimental results showed that the bulge height of semi?sphere part exceeded 38 mm at 350 ℃ under 0.8 MPa and the ratio of (height/diameter) is up to 0.95, which indicated an excellent QGBF formability. The empirical relationship between bulge height, bulging time and bulge height upon rupture was also obtained on the basis of the experimental data. Finally, a perfect 20 mm high rectangular part with good surface and edge quality was successfully fabricated through a 1. 2 mm thin sheet material by applying the empirical function.
参考文献
| [1] | Mary-Anne Kulas;Paul E. Krajewski;John R. Bradley;Eric M. Taleff .Forming Limit Diagrams for AA5083 under SPF and QPF Conditions[J].Materials Science Forum,2007(0):129-134. |
| [2] | FRANETOVIC V.Improved hot aluminum forming tribology by anodization[A].,2007:753-755. |
| [3] | KRAJEWSKI Paul E.The effect of lubrication on QPF formability[A].,2005:127-133. |
| [4] | BOISSIERE R;TERZI S;BLANDIN J J.Quick-Plastic forming:similarities and differences with Super-Plastic forming[A].France,2008:65-70. |
| [5] | Jon T. Carter;Paul E. Krajewski;Ravi Verma .The Hot Blow Forming of AZ31 Mg Sheet: Formability Assessment and Application Development[J].JOM,2008(11):77-81. |
| [6] | WU Horngyu;SUN Pinhou;ZHU Fengjun .Tensile properties and shallow pan rapid gas blow forming of commercial fine-grained Mg alloy AZ31B thin sheet[J].Procedia Engineering,2012,36:329-334. |
| [7] | 刘守法,时张杰,吴松林.5083铝合金快速超塑性气胀成形[J].热加工工艺,2013(21):49-51. |
| [8] | 崔令江,王刚,刘承勃.背压对AZ31镁合金板材快速气压胀形的影响[J].塑性工程学报,2012(06):45-49. |
| [9] | 王刚,王建珑,张拓达,张治朋.AZ31B镁合金板材快速气压胀形行为[J].中国有色金属学报,2011(09):2023-2027. |
| [10] | 李海连;王刚 .ZK60 镁合金板材快速气压胀形研究[J].材料科学与技术,2010,18(增刊 1):124-128. |
| [11] | 王刚,张治朋,张建凯.镁合金板材正反向快速气压胀形实验[J].塑性工程学报,2013(01):43-47. |
| [12] | 张建凯 .AZ31镁合金轧制箔材微成形尺寸效应研究[D].哈尔滨工业大学,2013. |
| [13] | 陆文林,吴晓炜,梁海建,王勇.铝合金覆盖件快速超塑成形技术的研究[J].热加工工艺,2013(15):39-41,44. |
| [14] | RAVI Verma .Quick plastic of a decklid inner panel with commercial AZ31 magnesium sheet[R].,2006. |
| [15] | 崔令江;王刚;张拓达 .AZ31镁合金航空仪表盘快速塑性成形试验研究[J].材料科学与技术,2010,18(增刊1):60-63. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%