将剪切低温浇注半固态(LSPSF)浆料制备工艺与传统高压铸造工艺衔接,研究出一种半固态浆料直接成形工艺--流变压铸技术.结果表明:LSPSF工艺可在15~20 s制备出初生α(Al)形状因子为0.93,晶粒尺寸为70 μm且分布均匀,初生α(Al)内部没有夹裹液相的YL112铝合金半固态浆料;与传统压铸相比,流变压铸可改善YL112合金铸件的微观组织,半固态浆料在二次凝固中发生体积凝固,铸件微观组织细小且分布均匀.该LSPSF流变铸造工艺与传统压铸工艺衔接简便,半固态浆料输送平稳,具有较强的可操作性.
参考文献
| [1] | 潘宪曾.压铸工艺与模具[M].北京:电子工业出版社,2006 |
| [2] | Z. Fan .Semisolid metal processing[J].International Materials Reviews,2002(2):49-85. |
| [3] | Stephen P. Midson .Rheocasting Processes for Semi-Solid Casting of Aluminum Alloys[J].Die Casting Engineer,2006(1):48-51. |
| [4] | JORSTAD J L.SSM processes-an overview[A].Limassol:The Worcester Polytechnic Institute and the Metals Processing Institute,2004:15-24. |
| [5] | SHIBATA R;KANEUCHI T;SOUDA T;YAMANE H.Formation of spherical solid phase in die casting shot sleeve without any agitation[A].Colorado:Colorado School of Mines,1998:465-470. |
| [6] | Z. Fan .Development of the rheo-diecasting process for magnesium alloys[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2005(0):72-78. |
| [7] | KANG Yong-lin;XU Yue;WANG Zhao-hui.Study on microstructure and mechanical properies of rheo-die casting semi-solid A356 aluminum alloy[J].Solid State Phenomena,2006(116-117):453-456. |
| [8] | XIAO Ze-hui,LUO Ji-rong,WU Shu-sen,LI Dong-nan.Performance of Semi-solid Slurry Produced by Twin-screw Stirring Mixer and Rheo-diecasting Process of AZ91D Alloy[J].武汉理工大学学报(材料科学版)英,2004(03):81-85. |
| [9] | Kaufmann H.;Wabusseg H. .Metallurgical and processing aspects of the NRC semisolid casting technology[J].Aluminium,2000(1/2):70-75. |
| [10] | Jim Yurko;Merton Flemings;Andy Martinez .Semi-solid rheocasting (SSR) - increasing the capabilities of die casting[J].Die Casting Engineer,2004(1):50-52. |
| [11] | H.M. Guo,X.J. Yang,B. Hu.RHEOCASTING OF A356 ALLOY BY LOW SUPERHEAT POURING WITH A SHEARING FIELD[J].金属学报（英文版）,2006(05):328-334. |
| [12] | GUO Hong-min;YANG Xiang-jie .Continuous fabrication of sound semi-solid slurry for rheoforming[J].Solid State Phenomena,2006,116-117:425-428. |
| [13] | 胡汉起.金属凝固原理[M].北京:机械工业出版社,2001:80-164. |
| [14] | OHNO A.Solidification-the separation theory and its practical applications[M].Germany:Springer-Verlag Press,1987:1-82. |
| [15] | GUO Hong-min;YANG Xiang-jie.Morphology evolution of primary alpha phase in rotated duct process[A].Limassol:The Worcester Polytechnic Institute and the Metals Processing Institute,2004:695-703. |
| [16] | Guo, HM;Yang, XJ .Efficient refinement of spherical grains by LSPSF rheocasting process[J].Materials Science and Technology,2008(1):55-63. |
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%