铝/钢异种金属焊接接头界面Al-Fe金属间化合物生成及其热力学分析

doi:10.13229/j.cnki.jdxbgxb201404021

吉林大学学报(工学版) ›› 2014, Vol. 44 ›› Issue (4): 1037-1041.doi: 10.13229/j.cnki.jdxbgxb201404021

铝/钢异种金属焊接接头界面Al-Fe金属间化合物生成及其热力学分析

黄健康, 何翠翠, 石玗, 樊丁

1.兰州理工大学有色金属合金及加工教育部重点实验室, 兰州 730050;
2.廊坊燕京职业技术学机电工程系, 河北廊坊 065200

收稿日期:2013-01-09 出版日期:2014-07-01 发布日期:2014-07-01
作者简介:黄健康(1981-), 男, 副教授.研究方向:异种金属焊接及数值计算.E-mail:sr2810@163.com
基金资助:
国家自然科学基金项目(51165023); 甘肃省自然科学基金项目(1010RJZA044); 陇原青年创新人才扶持计划项目; 甘肃省高校基本科研业务费专项项目; 兰州理工大学红柳青年培养计划项目

Thermodynamic analysis of Al-Fe intermetallic compounds formed by dissimilar joining of aluminum and galvanized steel

HUANG Jian-kang¹, HE Cui-cui^{1, 2}, SHI Yu¹, FAN Ding¹

1.State Key Laboratory of Gansu Advanced Nonferrous Metal Materials, Lanzhou University of Technology, Lanzhou 730050, China;
2.Department of Mechanical and Electrical Engineering, Langfang Yanjing Career Technical College, Langfang 065200, China

Received:2013-01-09 Online:2014-07-01 Published:2014-07-01

摘要/Abstract

摘要： 对铝/钢异种金属焊接接头界面进行了XRD和EDS分析, 结果表明:在Al-Fe界面上主要生成Fe₂Al₅和FeAl₃两种金属间化合物, 以热力学基本定律为基础, 建立了基于相图的Al-Fe金属间化合物形成的吉布斯自由能计算模型, 利用该模型分别计算了各Al-Fe金属间化合物形成的吉布斯自由能随温度变化的关系。结果表明, 生成Fe₂Al₅的吉布斯标准自由能比生成FeAl₃的低, 所以在铝/镀锌钢板的焊接过程中, Fe₂Al₅要比FeAl₃优先生成。

关键词: 金属材料, 铝/钢焊接, 金属间化合物, 热力学分析

Abstract: The interface of welding joint of aluminum and steel was analyzed using XRD, EDS and the related phase diagram. It was observed that a large number of Al-Fe Intermetallic Compounds (IMC), e. g. Fe₂Al₅ and FeAl₃, was formed in the joint interface. In order to study the relationship between Al-Fe IMC and the welding temperature, a model for Gibbs free energy calculation in the formation of Al-Fe IMC was established based on the basic law of thermodynamics. The Gibbs free energy of Al-Fe IMC with the variation of the temperature was simulated using this model. The results show that the primary Al-Fe IMCs in the interface are Fe₂Al₅ and FeAl₃. The Gibbs free energy for the generation of Fe₂Al₅ is lower than that of FeAl₃, so Fe₂Al₅ is generated prior to FeAl₃ in the welding process of joining of aluminum and galvanized steel.

Key words: metallic materials, joining of aluminum to steel, intermetallic compounds, thermodynamic analysis

中图分类号:

TG111

黄健康¹, 何翠翠^{1, 2}, 石玗¹, 樊丁¹. 铝/钢异种金属焊接接头界面Al-Fe金属间化合物生成及其热力学分析[J]. 吉林大学学报(工学版), 2014, 44(4): 1037-1041.

HUANG Jian-kang, HE Cui-cui, SHI Yu, FAN Ding. Thermodynamic analysis of Al-Fe intermetallic compounds formed by dissimilar joining of aluminum and galvanized steel[J]. 吉林大学学报(工学版), 2014, 44(4): 1037-1041.

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铝/钢异种金属焊接接头界面Al-Fe金属间化合物生成及其热力学分析

Thermodynamic analysis of Al-Fe intermetallic compounds formed by dissimilar joining of aluminum and galvanized steel

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