秦颐鸣¹  庄林忠² 冯恩浪¹  赵解扬¹ 王春霞³

(1.吉利百矿集团有限公司； 2.北京科技大学新金属材料国家重点实验室；

3.桂林理工大学材料科学与工程学院)

摘要:通过建立铝合金熔体吸氢的热力学过程模型，分析了影响Al-Si-Mg系铝合金熔体吸氢的热力学因素。结果表明，降低空气湿度、熔炼温度、压力有利于降低铝液吸氢速率；Si、Mg含量与空气/铝液界面处的氢含量成线性关系，提高Si含量、降低Mg含量有利于降低空气/铝液界面处的氢含量，从而降低铝液的吸氢速率。

关键词：铝合金；氢含量；吸氢；热力学

中图分类号:TG146.21;TG166.3   文献标志码    A

DOI:10.15980/j.tzzz.2020.04.025

A Thermodynamic Model for Hydrogen Absorption of Al-Si-Mg Alloy Melt

Qin Yiming¹,  Zhuang Linzhong², Feng Enlang¹, Zhao Jieyang¹,  Wang Chunxia³

(1.Geely Baise Mining Group Co., Ltd.; 2.SKL of Advanced Metal Material, University of Science and Technology Beijing; 3.College of Materials Science and Engineering, Guilin University of Technology)

Abstract:The thermodynamic factors affecting the hydrogen absorption of Al-Si-Mg alloy melt were analyzed by establishing the thermodynamic model. The results show that through reducing air humidity, melting temperature and pressure, it is helpful to reducing hydrogen absorption rate of aluminum melt. The content of silicon and magnesium is linearly proportional to the content of \[H\]* at the air/melt interface. Through increasing the content of silicon and reducing the content of magnesium, it is conductive to reducing the content of [H]* at the air/melt interface, thereby reducing the hydrogen absorption rate of liquid aluminum.

Key Words: Aluminum Alloy, Hydrogen Content, Hydrogen Absorption, Thermodynamics