Defects and Improvement of Aluminum Alloy Hollow Ingot Produced by Hot Top Process

Du Xinyu; Ma Zhipu

doi:10.15980/j.tzzz.2015.01.030

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Defects and Improvement of Aluminum Alloy Hollow Ingot Produced by Hot Top Process
Vol. 35, Issue 1, Pages: 100-102(2015)
Published： 2015 ，
DOI： 10.15980/j.tzzz.2015.01.030

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[1]杜新宇,马质璞.铝合金热顶铸造空心铸锭缺陷及改进[J].特种铸造及有色合金,2015,35(01):100-102.

Du Xinyu, Ma Zhipu. Defects and Improvement of Aluminum Alloy Hollow Ingot Produced by Hot Top Process. [J]. Special Casting & Nonferrous Alloys 35(1):100-102(2015)
[1]杜新宇,马质璞.铝合金热顶铸造空心铸锭缺陷及改进[J].特种铸造及有色合金,2015,35(01):100-102. DOI： 10.15980/j.tzzz.2015.01.030.

Du Xinyu, Ma Zhipu. Defects and Improvement of Aluminum Alloy Hollow Ingot Produced by Hot Top Process. [J]. Special Casting & Nonferrous Alloys 35(1):100-102(2015) DOI： 10.15980/j.tzzz.2015.01.030.

摘要

介绍了铝合金热顶铸造空心锭实际应用技术

分析了铝合金热顶铸造空心锭在生产过程中铸锭内孔偏心、内孔拉裂、漏铝等缺陷产生的机理

制定了工艺及模具的改进措施。经生产验证

改进后的模具生产出的热顶铸造空心铝合金锭壁厚均匀

满足了挤压对空心锭的品质要求

生产出合格的铝合金无缝管。

Abstract

The practical technology for hollow aluminum alloy ingot by hot top casting method was described.The mechanism of eccentricity and tension crack of inner hole as well as aluminum leakage of hollow ingot was analyzed.Technological improvements especially die casting die structure improvement was presented.The results show that the hollow ingot produced by the modified mould exhibits uniform wall thickness

meeting the quality requirements of hollow ingot during extrusion process.The qualified aluminum alloy seamless pipe was produced.