Controlling Ways of Mg Segregation Layer Thickness in 5182 Al-Mg Alloy Ingot

Li Taibao

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Controlling Ways of Mg Segregation Layer Thickness in 5182 Al-Mg Alloy Ingot
Issue 6, Pages: 417-419(2008)
Published： 2008 ，
DOI：

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[1]李太宝.5182合金Mg偏析层厚度的控制措施[J].特种铸造及有色合金,2008(06):417-419+405.

Li Taibao. Controlling Ways of Mg Segregation Layer Thickness in 5182 Al-Mg Alloy Ingot. [J]. Special Casting & Nonferrous Alloys (6):417-419(2008)
[1]李太宝.5182合金Mg偏析层厚度的控制措施[J].特种铸造及有色合金,2008(06):417-419+405. DOI：

Li Taibao. Controlling Ways of Mg Segregation Layer Thickness in 5182 Al-Mg Alloy Ingot. [J]. Special Casting & Nonferrous Alloys (6):417-419(2008) DOI：

摘要

通过对生产中5182合金Mg偏析层缺陷的分析

确定了Mg偏析层缺陷的影响因素

以及控制Mg偏析层厚度的措施。通过采用双排水孔的LHC结晶器

改善冷却强度

铸造开始阶段

冷却水流量为98m3/h

运行阶段线性增加到239m3/h

保证冷却水流量与铸造速度的匹配性

金属液面高度控制在40mm

Mg偏析层厚度有效控制在1.5～2.0mm范围内。

Abstract

The factors influencing Mg segregation layer thickness and ways controlling Mg segregation layer thickness were described by analyzing origination of Mg segregation in 5182 Al-Mg alloy.Mg segregation layer thickness can be controlled in 1.5

mm by adopting LHC mould with double-water-exhausted pore to enhance the cooling rate and cooling water volume at 98 m3/h at initial stage and increasing linearly 239 m3/h at working stage to ensure the match of cooling rate with drawing velocity as well as controlling height of liquid metal at 40mm.