Wedge Pressing and Microstructure Evolution of Spray Deposited SiC<sub>p</sub>/Al-Fe-V-Si Sheet

Xu Zhengkun; He Yiqiang; Qian Chenchen

doi:10.15980/j.tzzz.2017.11.023

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Wedge Pressing and Microstructure Evolution of Spray Deposited SiC_p/Al-Fe-V-Si Sheet
Vol. 37, Issue 11, Pages: 1242-1244(2017)
Published： 2017 ，
DOI： 10.15980/j.tzzz.2017.11.023

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[1]徐政坤,贺毅强,钱晨晨.喷射沉积SiC_p/Al-Fe-V-Si板坯的楔形压制与组织演变[J].特种铸造及有色合金,2017,37(11):1242-1244.

Xu Zhengkun, He Yiqiang, Qian Chenchen. Wedge Pressing and Microstructure Evolution of Spray Deposited SiC_p/Al-Fe-V-Si Sheet. [J]. Special Casting & Nonferrous Alloys 37(11):1242-1244(2017)
[1]徐政坤,贺毅强,钱晨晨.喷射沉积SiC_p/Al-Fe-V-Si板坯的楔形压制与组织演变[J].特种铸造及有色合金,2017,37(11):1242-1244. DOI： 10.15980/j.tzzz.2017.11.023.

Xu Zhengkun, He Yiqiang, Qian Chenchen. Wedge Pressing and Microstructure Evolution of Spray Deposited SiC_p/Al-Fe-V-Si Sheet. [J]. Special Casting & Nonferrous Alloys 37(11):1242-1244(2017) DOI： 10.15980/j.tzzz.2017.11.023.

摘要

采用多层喷射沉积技术制备了SiC

/Al-8.5Fe-1.3V-1.7Si复合材料板坯

再通过多道次楔形压制制备了复合材料板材。介绍了楔形压制喷射沉积铝基复合材料的压制设备、成形原理与过程;研究了板坯在楔形压制过程中孔洞、SiC

分布、弥散粒子和SiC-Al界面的演变。结果表明

楔形压制工艺能有效致密喷射沉积板坯

当压下量为50%时

沉积颗粒边界消除

相对密度达97.6%

且能使SiC

分布均匀

但因剪切作用小

弥散分布的微型孔洞未能完全消除;板坯在480℃下多道次楔形压制

弥散粒子依然保持在60

00nm

未见明显长大

且未向Al13Fe4等平衡相转变

SiC-Al界面干净

纳米过渡层可以提高界面润湿性。

Abstract

SiC

/Al-8.5 Fe-1.3 V-1.7 Si composites prepared by multi-layer spraying deposition were densified by multi-pass wedge pressing.Equipment

forming principle and procedure of wedge pressing of spraying deposited Al-matrix composite were introduced.Evolution of pore

SiC

distribution

secondphase dispersoids and SiC/Al interface of composite plate during wedge pressing were observed.The results reveal that the composite blank can be densified by wedge pressing

and boundaries at deposited particles are eliminated by wedge pressing with 50% in reduction

and relative density of the pressed composites reaches up to 97.6% with homogeneous SiC particle distribution.However

the dispersed pores are difficult to be eliminated by wedge pressing because of its low shearing forces.Dispersoids still keep with 60

00 nm in diameter from growing obviously and transforming into equilibrium phase such as Al13 Fe4 during the wedge pressing at 480℃.SiC/Al interface of the composite plate as-wedge pressed exhibits clean

which is contributed to the wettability between SiC

and Al matrix.