为了探明压铸生产过程中熔融铝合金速度、压力场对模具侵蚀过程的影响及其作用机理,本文设计动态侵蚀试验,通过计算流体动力学仿真软件计算旋转试样圆周区域速度场和压力场分布状态,观察试样表面的宏观形貌并利用SEM、EDS作元素微量分析.结果显示:试样前端与尾端区域速度最大,前端与远端之间压力场最大;流体压力场对试样侵蚀的影响属压应力作用,促进原子间的扩散,加快金属间化合物生成的速度,加剧试样表面的侵蚀程度;流体速度场对试样侵蚀的影响属切应力作用,导致生成并附着于试样表面的金属化合物层剥离,造成深坑状的腐蚀形貌.
参考文献
| [1] | 王荣滨.铝合金压铸模失效分析、选材与强化处理研究[J].模具制造,2008(02):76-80. |
| [2] | SUMANTH SHANKAR;DIRAN APELIAN.Die Soldering: Mechanism of the Interface Reaction between Molten Aluminum Alloy and Tool Steel[J].Metallurgical and Materials Transactions, A. Physical Metallurgy and Materials Science,20023(3):465-476. |
| [3] | K. Venkatesan;R. Shivpuri.Experimental and Numerical Investigation of the Effect of Process Parameters on the Erosive Wear of Die Casting Dies[J].Journal of Materials Engineering and Performance,19952(2):166-174. |
| [4] | 陈玉华;吴晓春;闵永安.表面处理对H13钢抗动态热熔损性能的影响[J].钢铁研究学报,2008(10):49-52. |
| [5] | Z.W.Chen.Formation and progression of die soldering during high pressure die casting[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,20051/2(1/2):356-369. |
| [6] | Q. HAN;S. VISWANATHAN.Analysis of the Mechanism of Die Soldering in Aluminum Die Casting[J].Metallurgical and Materials Transactions, A. Physical Metallurgy and Materials Science,20031(1):139-146. |
| [7] | V. Joshi;A. Srivastava;R. Shivpuri.Intermetallic formation and its relation to interface mass loss and tribology in die casting dies[J].Wear: an International Journal on the Science and Technology of Friction, Lubrication and Wear,200411/12(11/12):1232-1235. |
| [8] | 李岩;凌国平;刘柯钊;陈长安;张桂凯.热处理对201不锈钢与铝镀层界面组织转变的影响[J].材料科学与工程学报,2009(3):332-336. |
| [9] | Alicja Krella.Cavitation erosion of TiN and CrN coatings deposited on different substrates[J].Wear: an International Journal on the Science and Technology of Friction, Lubrication and Wear,20131/2(1/2):992-997. |
| [10] | 周兰英;杨健;贾庆莲.TiN涂层微观组织结构与表面性能的研究[J].材料科学与工程学报,2003(1):80-82. |
| [11] | 刘洪喜;汤宝寅;王小峰;王浪平;于永澔;孙韬.9Cr18轴承钢表面不同等离子体浸没离子注入强化处理技术研究[J].材料科学与工程学报,2005(2):167-171. |
| [12] | A. Srivastava;V. Joshi;R. Shivpuri.Computer modeling and prediction of thermal fatigue cracking in die-casting tooling[J].Wear: an International Journal on the Science and Technology of Friction, Lubrication and Wear,20041/2(1/2):38-43. |
| [13] | H. Xiaoxia;Y. Hua;Z. Yan.Effect of Si on the interaction between die casting die and aluminum alloy[J].Materials Letters,200427/28(27/28):3424-3427. |
| [14] | H. Springer;A. Kostka;E.J. Payton.On the formation and growth of intermetallic phases during interdiffusion between low-carbon steel and aluminum alloys[J].Acta materialia,20114(4):1586-1600. |
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%