Oxygen Content and Crack Control of Oxygen-free Copper Continuous Casting Ingot

Ding Lei; Guo Ming’en; Chen Yinghao

doi:10.15980/j.tzzz.2019.12.019

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Oxygen Content and Crack Control of Oxygen-free Copper Continuous Casting Ingot
Vol. 39, Issue 12, Pages: 1345-1347(2019)
Published： 2019 ，
DOI： 10.15980/j.tzzz.2019.12.019

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[1]丁磊,郭明恩,陈英豪.无氧铜连铸锭氧含量及裂纹控制[J].特种铸造及有色合金,2019,39(12):1345-1347.

Ding Lei, Guo Ming’en, Chen Yinghao. Oxygen Content and Crack Control of Oxygen-free Copper Continuous Casting Ingot. [J]. Special Casting & Nonferrous Alloys 39(12):1345-1347(2019)
[1]丁磊,郭明恩,陈英豪.无氧铜连铸锭氧含量及裂纹控制[J].特种铸造及有色合金,2019,39(12):1345-1347. DOI： 10.15980/j.tzzz.2019.12.019.

Ding Lei, Guo Ming’en, Chen Yinghao. Oxygen Content and Crack Control of Oxygen-free Copper Continuous Casting Ingot. [J]. Special Casting & Nonferrous Alloys 39(12):1345-1347(2019) DOI： 10.15980/j.tzzz.2019.12.019.

摘要

对降低无氧铜连铸锭的含氧量和裂纹消除进行了研究。首先通过保温熔炼整体炉的研制将保温、熔炼工序合二为一

将铜合金传统上的三段式制备方法升级为熔炼保温和连铸的两段式制备方法;其次

提出并实现了控制熔体流动与停止的闸阀技术

最后对宽厚比为650 mm/20 mm的无氧铜铸锭的裂纹缺陷进行了分析

通过设置合理的冷却参数

控制铸锭的含氧量≤0.000 4%

使铸件密度增大到8.94～8.95 g/cm

裂纹完全消除。

Abstract

The decrease of oxygen content and crack in oxygen-free copper ingots were analyzed. Firstly

through the development of an integrated holding temperature smelting furnace

the holding temperature and melting process were integrated into the whole. Therefore

the traditional three-stage fabrication method of alloy copper was modified into a two-stage fabrication method of holding smelting and drawing casting of anaerobic copper. Secondly

the gate valve technology of controlling melt flow and stopping was proposed and realized. Thirdly

the crack of anaerobic copper ingot with width/thickness ratio of 650 mm/20 mm was analyzed. Finally

the reasonable cooling parameters were determined through experiments. With ingot oxygen content ≤0.000 4% and density increased to 8.94～8.95 g/cm

crack is completely eliminated.