Effects of Electromagnetic Stirring on the Solidification Microstructure and Properties of Cu-2Ag Alloy

Guo Wei; Hong Zhiyuan; Chen Yan; Song Hongwu; Wang Kelu; Zhang Shihong; Wang Jun

doi:10.15980/j.tzzz.2022.01.015

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Effects of Electromagnetic Stirring on the Solidification Microstructure and Properties of Cu-2Ag Alloy
Vol. 42, Issue 1, Pages: 73-77(2022)
Published： 2022 ，
DOI： 10.15980/j.tzzz.2022.01.015

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Guo Wei, Hong Zhiyuan, Chen Yan, et al. Effects of Electromagnetic Stirring on the Solidification Microstructure and Properties of Cu-2Ag Alloy. [J]. Special Casting & Nonferrous Alloys 42(1):73-77(2022)
DOI：

Guo Wei, Hong Zhiyuan, Chen Yan, et al. Effects of Electromagnetic Stirring on the Solidification Microstructure and Properties of Cu-2Ag Alloy. [J]. Special Casting & Nonferrous Alloys 42(1):73-77(2022) DOI： 10.15980/j.tzzz.2022.01.015.

摘要

采用真空下引连铸加电磁搅拌工艺铸造?15 mm的Cu-2Ag合金杆坯

分别研究了电磁搅拌参数和拉坯速度对Cu-2Ag合金组织和硬度的影响。结果表明

随着搅拌频率的升高

合金凝固组织晶粒尺寸逐渐减小;在电流为280 A时合金组织的细化效果较为明显

且合金硬度随着频率改变有明显变化。相对于拉坯速度为6 mm/min

4 mm/min时合金硬度有所提高

在不同的拉坯速度和电流强度下

搅拌频率为50 Hz时其硬度均达到最高。

Abstract

Cu-2 Ag alloy rod billet with a diameter of 15 mm was fabricated by vacuum continuous down-drawing casting and electromagnetic stirring process. The influence law of electromagnetic stirring on microstructure and Vickers hardness of Cu-2 Ag alloy under different parameters were investigated. The results indicate that the grain size of the solidification microstructure of the alloy is decreased gradually with the increase of stirring frequency.The refinement effect of the alloy structure is desirable under the current of 280 A

and the hardness of alloy is changed obviously with frequency. Compared with that at the drawing speed of 6 mm/min

the Vickers hardness of the alloy specimen is increased at the drawing speed of 4 mm/min. Under different drawing speeds and current intensities

the Vickers hardness reaches the maximum when the stirring frequency is 50 Hz.