高能电脉冲处理对海洋结构用钢焊接接头组织及性能的影响

doi:10.13251/j.issn.0254-6051.2024.04.021

金属热处理 ›› 2024, Vol. 49 ›› Issue (4): 131-137.DOI: 10.13251/j.issn.0254-6051.2024.04.021

高能电脉冲处理对海洋结构用钢焊接接头组织及性能的影响

王艺橦, 侯华兴, 张弛, 潘栋

鞍钢集团北京研究院有限公司, 北京 102211

收稿日期:2023-10-16 修回日期:2024-03-05 出版日期:2024-04-25 发布日期:2024-05-27
作者简介:王艺橦(1993—),女,研究员,博士,主要研究方向为金属材料的电致强化,E-mail: 929633853@qq.com
基金资助:
国家重点研发计划(2017YFB0304700)

Effect of high energy electro-pulsing treatment on microstructure and properties of welded joints of marine structural steel

Wang Yitong, Hou Huaxing, Zhang Chi, Pan Dong

Ansteel Beijing Research Institute Co., Ltd., Beijing 102211, China

Received:2023-10-16 Revised:2024-03-05 Online:2024-04-25 Published:2024-05-27

摘要/Abstract

摘要： 研究了单一温度/组合式电脉冲技术对一种海洋结构用低合金钢焊接接头组织及性能的影响。结果表明,两种电脉冲技术均可显著细化晶粒并提高其低温冲击性能。电脉冲处理可降低新相形核的势垒,提高奥氏体的形核率,同时改变位错组态,从而达到细晶强化和位错强化的效果。与未处理焊接接头相比,单一温度电脉冲500 ℃试样的母材晶粒尺寸降低93.3%,性能最优的组合式电脉冲900 ℃+650 ℃试样的焊缝区-40 ℃冲击吸收能量提高200.12%,-60 ℃冲击吸收能量提高146.99%,强塑积提高36.61%。

关键词: 高能电脉冲处理, 海洋结构用钢, 焊接接头, 组织, 性能

Abstract: Effect of single temperature/combined electro-pulsing technique on the microstructure and properties of welded joints of low alloy steel used in marine structures was studied. The results show that both of the electro-pulsing treatments can refine the grain size and improve the cryogenic impact property significantly. The electro-pulsing treatment can reduce the barrier of new phase nucleation, improve the nucleation rate of austenite, change the configuration of dislocations, and as a result, the effect of grain strengthening and dislocation strengthening can be achieved. Compared with the welded joints without electro-pulsing treatment, the grain size of the base metal of the single temperature electro-pulsing specimen at 500 ℃ is reduced by 93.3%, the impact absorbed energy at -40 ℃ of the welded joints of optimal combined electro-pulsing treated specimen at the temperature of first 900 ℃ and then 650 ℃ is increased by 200.12%, the impact absorbed energy at -60 ℃ is increased by 146.99%, the product of strength and elongation of the steel is increased by 36.61%.

Key words: high energy electro-pulsing, marine structural steel, welded joint, microstructure, properties

中图分类号:

TG142

王艺橦, 侯华兴, 张弛, 潘栋. 高能电脉冲处理对海洋结构用钢焊接接头组织及性能的影响[J]. 金属热处理, 2024, 49(4): 131-137.

Wang Yitong, Hou Huaxing, Zhang Chi, Pan Dong. Effect of high energy electro-pulsing treatment on microstructure and properties of welded joints of marine structural steel[J]. Heat Treatment of Metals, 2024, 49(4): 131-137.

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高能电脉冲处理对海洋结构用钢焊接接头组织及性能的影响

Effect of high energy electro-pulsing treatment on microstructure and properties of welded joints of marine structural steel

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