Quality Detection of 319 Al Alloy Melt by Thermal Analysis

L Jiannan1; Zhang Jing2; Tong Yuanyuan1; Cai Guohua1; Hua Qin1

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Quality Detection of 319 Al Alloy Melt by Thermal Analysis
Issue 5, Pages: 395-397(2008)
Published： 2008 ，
DOI：

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[1]吕建南,章晶,佟媛媛,蔡国华,华勤.热分析技术检测319铝合金熔体质量的研究[J].特种铸造及有色合金,2008(05):395-397+327.

L Jiannan1, Zhang Jing2, Tong Yuanyuan1, et al. Quality Detection of 319 Al Alloy Melt by Thermal Analysis. [J]. Special Casting & Nonferrous Alloys (5):395-397(2008)
[1]吕建南,章晶,佟媛媛,蔡国华,华勤.热分析技术检测319铝合金熔体质量的研究[J].特种铸造及有色合金,2008(05):395-397+327. DOI：

L Jiannan1, Zhang Jing2, Tong Yuanyuan1, et al. Quality Detection of 319 Al Alloy Melt by Thermal Analysis. [J]. Special Casting & Nonferrous Alloys (5):395-397(2008) DOI：

摘要

运用热分析技术研究了冷却曲线特征值与319铝合金铸件气孔率及变质剂Sr的加入量之间的关系。结果表明

TEAl

Smiin与TAEl

Cmuin的温度差ΔT与铸件气孔率P之间有显著的关系

随气孔率P的增大

ΔT呈上升趋势

其关系可表示为P=45.0+0.417×ΔT。319铝合金中变质剂Sr的加入量达到0.008%时

合金充分变质

Sr的加入量超过0.030%时

变质效果变差

Sr的加入量大于0.008%时

Sr的加入量与TAEl

Smiin的关系可以表示为:TEAl

Smiin=543.2+375.5×wSr-5399.3×wS2r。

Abstract

The relationships between characteristic value of cooling curve and the porosity of 319 Al alloy as well as the content of modifier Sr have been detected by thermal analysis. The results show that the temperature difference is closely related to the porosity in castings. With increasing in porosity

the temperature difference is increased. The alloy can be totally modified with 0.008% Sr addition while the modification effects can be deteriorated with the Sr addition more than 0.03%.