Effects of Partial Remelting on the Microstructure Evolution of SiC<sub>p</sub>/2024<sub>p</sub> Aluminum Composites Prepared by Alloy Powder Cold Pressing

Li Pubo; Chen Tijun; Zhang Suqing; Wang Yingjun

doi:10.15980/j.tzzz.2015.03.11

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Effects of Partial Remelting on the Microstructure Evolution of SiC_p/2024_p Aluminum Composites Prepared by Alloy Powder Cold Pressing
Vol. 35, Issue 3, Pages: 260-264(2015)
Published： 2015 ，
DOI： 10.15980/j.tzzz.2015.03.11

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[1]李普博,陈体军,张素卿,王英俊.部分重熔对SiC_p/2024_p冷压块半固态组织演变的影响[J].特种铸造及有色合金,2015,35(03):260-264.

Li Pubo, Chen Tijun, Zhang Suqing, et al. Effects of Partial Remelting on the Microstructure Evolution of SiC_p/2024_p Aluminum Composites Prepared by Alloy Powder Cold Pressing. [J]. Special Casting & Nonferrous Alloys 35(3):260-264(2015)
[1]李普博,陈体军,张素卿,王英俊.部分重熔对SiC_p/2024_p冷压块半固态组织演变的影响[J].特种铸造及有色合金,2015,35(03):260-264. DOI： 10.15980/j.tzzz.2015.03.11.

Li Pubo, Chen Tijun, Zhang Suqing, et al. Effects of Partial Remelting on the Microstructure Evolution of SiC_p/2024_p Aluminum Composites Prepared by Alloy Powder Cold Pressing. [J]. Special Casting & Nonferrous Alloys 35(3):260-264(2015) DOI： 10.15980/j.tzzz.2015.03.11.

摘要

研究了SiCp/2024p冷压块在部分重熔过程中的组织演变

并与基体合金进行了对比

探讨了温度对组织的影响。结果表明

冷压块在部分重熔过程中可分为3个阶段:初期晶粒的快速粗化、组织分离与球状化以及后期初生相颗粒的粗化;基体组织的分离快于复合材料

且基体的初生相颗粒尺寸小于复合材料的;重熔温度太高时

半固态浆料品质变差。

Abstract

The microstructure evolution of SiCp/2024 pAl composites prepared by alloy powder cold-pressing during partial remelting was investigated

and it was compared with those of the 2024 pmatrix.Effects of heating temperature on semisolid microstructure were described.The results indicate that the microstructural evolution process can be divided into three stages:the initial rapid coarsening of the fine grains within powders

structural separation and spheroidization

final coarsening of primary particles

respectively.The separation of the microstructure of the 2024 p matrix is faster than that of the composites during partial remelting

moreover

the primary particle size of the matrix microstructure is smaller than that of the composites.However

many advantages of thixoforming can be lost if the temperature is very high.