Analysis of compounds in joint core by resistance spot of AZ31B magnesium alloy and SPHC galvanized steel

被引：0
|
作者：
Zheng S. [1 ]
Cheng D. [1 ]
Chen Y. [1 ]
Hu D. [1 ]
机构：
[1] College of Aeronautical Manufacturing Technology, Nanchang Hangkong University, Nanchang
来源：
Cheng, Donghai (70269@nchu.edu.cn) | 1600年 / Editorial Office of Chinese Journal of Rare Metals卷 / 40期
关键词：
Joint formation mechanism; Resistance spot; Thermodynamics;
D O I：
10.13373/j.cnki.cjrm.XY15040203
中图分类号：
学科分类号：
摘要：
Magnesium alloy has the advantages of light weight, high tensile strength and strong damping ability. Steel has the dominant position in the manufacturing industry. The connecting of magnesium and steel has positive significance in lightweight design of automotive components and energy conservation. 2.0 mm thick of AZ31B and 1.0 mm thick of SPHC were welded by KDWJ-17 three-phase secondary rectification resistance welding machine for welding test. Scanning electron microscopy (SEM) was used to analyze organizational structure and distribution of composition of the joints, and the thermodynamics of compounds were analyzed to research the mechanism of formation of the compounds. The results showed that Fe2Al5 compound at the interface was the main reason to form a high-strength welding joints of magnesium alloy and galvanized steel by resistance spot. Combined with binary phase diagram and calculation of thermodynamic of Fe-Al, Fe2Al5 was the most favorable phase to generate in the compounds of Fe-Al in resistance spot welding joint of magnesium alloy and galvanized steel. Fe2Al5 had the strongest ability to maintain its structural stability in compounds of Fe-Al. © Editorial Office of Chinese Journal of Rare Metals. All right reserved.
引用
收藏
页码：872 / 876
页数：4
相关论文
共 16 条
  • [1] Zhang G.H., Zhang P.Z., Pan J.D., Research and developments of magnesium and magnesium alloys, Scientific and Technological Research and Development in the World, 25, 1, (2003)
  • [2] Yang S.Y., Liu D.D., Status and prospect of friction stir welding of magnesium alloys, Chinese Journal of Rare Metals, 38, 5, (2014)
  • [3] Yu K., Li W.X., Wang R.C., Research, development and application of wrought magnesium alloys, Chinese Journal of Nonferrous Metals, 13, 2, (2003)
  • [4] Zhang Z.D., Liu L.M., Song G., Welding characteristics of AZ31B magnesium alloy using DC-PMIG welding, Transactions of Nonferrous Metals Society of China, 2, (2013)
  • [5] Qi X.D., Song G., Interfacial structure of the joints between magnesium alloy and mild steel with nickel as interlayer by hybrid laser-TIG welding, Materials and Design, 31, 1, (2010)
  • [6] Miao Y.G., Han D.F., Yao J.Z., Wang Q., Welding characteristics of laser penetration welding-brazed Mg/steel dissimilar alloys, Transactions of the China Welding Institution, 32, 1, (2011)
  • [7] Friedrich H., Schumann S., Research for a “new age of magnesium” in the automotive industry, Journal of Materials Processing Technology, 117, 3, (2001)
  • [8] Tan C.W., Mei C.X., Li L.Q., Dai J.M., Guo W., Single and dual beam laser welding-brazing characteristics of magnesium/zinc-coated steel dissimilar alloys, Chinese Journal of Nonferrous Metals, 22, 6, (2012)
  • [9] Huang W.Q., Ma L.J., Wang X., Welding of magnesium alloy with other metal and alloy, Aerospace Materials & Technology, 40, 4, (2010)
  • [10] Chen Y.C., Nakata K., Effect of tool geometry on microstructure and mechanical properties of friction stir lap welded magnesium alloy and steel, Materials and Design, 30, 9, (2009)
12