| 引用本文: | 易金权,曾凯,丁燕芳,何晓聪,邢保英,翟停停.DP590高强钢双脉冲胶接点焊的工艺研究[J].材料科学与工艺,2019,27(4):91-96.DOI:10.11951/j.issn.1005-0299.20180184. |
| YI Jinquan,ZENG Kai,DING Yanfang,HE Xiaocong,XING Baoying,ZHAI Tingting.Investigation on double pulse weld bonding for DP590 high strength steel[J].Materials Science and Technology,2019,27(4):91-96.DOI:10.11951/j.issn.1005-0299.20180184. |
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| 摘要: |
| 针对DP590高强钢薄板, 本文提出一种应用双脉冲电流进行高强钢胶接点焊的连接工艺，通过双脉冲胶接点焊正交试验，研究双脉冲胶接点焊工艺对接头力学性能及显微组织的影响，并应用极差分析获得双脉冲胶接点焊最优工艺参数，对比分析单脉冲和双脉冲胶接点焊接头的力学性能、金相组织、显微硬度.研究表明：双脉冲电流的引入可有效降低胶接点焊过程飞溅的产生，提高胶接点焊工艺的稳定性.其中，电流是影响双脉冲胶接点焊接头力学性能的主要因素.采用双脉冲胶接点焊工艺，可明显细化熔核区的晶粒，熔核区密集分布大量的板条状马氏体，有助于提升焊核区的显微硬度，提高接头的整体韧性和强度. |
| 关键词: 胶接点焊 双脉冲工艺 正交试验 金相组织 显微硬度 |
| DOI：10.11951/j.issn.1005-0299.20180184 |
| 分类号:TG44 |
| 文献标识码:A |
| 基金项目:国家自然科学基金资助项目(51565022). |
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| Investigation on double pulse weld bonding for DP590 high strength steel |
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YI Jinquan, ZENG Kai, DING Yanfang, HE Xiaocong, XING Baoying, ZHAI Tingting
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(Faculty of Mechanical and Electrical Engineering, Kunming University of Science and Technology, Kunming 650500, China)
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| Abstract: |
| This paper proposes a connection process of high strength steel weld bonding with double pulse current for DP590 high strength steel. The sheet of DP590 high strength steel was used for double pulse weld bonding with an orthogonal test. Effects of double pulse weld bonding process on the mechanical properties and microstructure of the joints were investigated, and the optimal parameters of double pulse weld bonding were obtained by the application of range analysis. The static mechanical properties, microstructure, and microhardness of single pulse and double pulse weld bonding joints were compared. Results show that the introduction of double pulse current can effectively reduce the occurrence of spatter in the weld bonding and improve the process stability of the weld bonding. The current is the main factor which influences the mechanical properties of the double pulse weld-bonded joints. Furthermore, the double pulse weld bonding can obviously refine the crystal grains of the nugget zone. A large number of lath-shaped martensites were concentrated in the nugget zone, which increased the microhardness of the weld zone and improved the overall toughness and strength of the joints. |
| Key words: weld bonding double pulse orthogonal test microstructure microhardness |
