文章信息/Info

Title:

Recent Progress in Welding Technology under External Magnetic Fields

文章編號:

1674-3962(2020)06-0472-08

作者:

龍瓊1; 鐘云波2; 余正平1; 龍紹檑1; 李娟1; 伍玉嬌1

（1. 貴州理工學院 貴州省輕金屬材料制備技術重點實驗室，貴州 貴陽 550003）（2. 上海大學材料科學與工程學院 省部共建高品質特殊鋼冶金與制備國家重點實驗室，上海 200444）

Author(s):

LONG Qiong1; ZHONG Yunbo2; YU Zhengping1; LONG Shaolei1; LI Juan1; WU Yujiao1

(1. Guizhou Key Laboratory for Preparation of Light Metal Materials, Guizhou Institute of Technology, Guiyang 550003, China) (2. State Key Laboratory of Advanced Special Steel, School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China)

關鍵詞:

磁場; 焊接; 組織; 電磁攪拌; 展望

Keywords:

magnetic field;  welding;  microstructure;  electromagnetic stirring;  prospect

分類號:

TG456.9

文獻標志碼:

A

摘要:

近年來，磁控焊接技術受到了國內外研究人員的廣泛重視。在焊接過程及焊后熱處理過程中施加磁場，可以顯著改善熔池金屬的傳質及傳熱行為，細化晶粒組織，減少成分偏析，促使第二相均勻化彌散分布，降低氣孔、熱裂紋等焊接缺陷的敏感性，顯著提升焊縫力學性能。綜述了國內外近年來磁控焊接技術的研究成果，對比了外加磁場與無磁場下焊接的特點，總結了Lorentz力、熱電磁力、磁場力、磁Gibbs自由能對焊接過程的影響機制，以及磁場對焊縫微觀組織、電弧形態、力學性能的影響規律。提出開發多尺度磁場下磁控復合焊接技術、磁控熱處理技術結合焊接過程中電流場、溫度場、應力場（應變場）有限元分析是將來磁控焊接技術的研究重點。

Abstract:

In recent years, magnetron welding technology has received extensive attention at home and abroad. The application of magnetic field in the process of welding and post�瞱eld heat treatment can significantly improve the mass transfer and heat transfer behavior of molten pool metal, refine the microstructure, reduce segregation, promote the dispersed distribution of second phase, reduce the sensitivity of welding defects such as pore and crack, and thus significantly improve the mechanical properties of the weld zone. The influence mechanism of Lorentz force, magnetic field force, thermoelectric electromagnetic force, and magnetic Gibbs free energy on the welding process is summarized. At the same time, the influence rule of the magnetic field on microstructure, arc shape, and mechanical properties of the weld seam, and the corresponding principle are analyzed and discussed. It is pointed out that the development of multi-scale magnetic field, magnetron hybrid welding technology, magnetron heat treatment technology combined with finite element analysis of the current field, temperature field and stress field (strain field) in the welding process will be the research focus of magnetron welding technology in the future.