电焊机2023，Vol.53Issue(12)：101-106,6.DOI:10.7512/j.issn.1001-2303.2023.12.16
超声冲击处理对服役态12Cr1MoV钢焊接接头的组织结构与性能影响
Study on the Effect of Ultrasonic Impact Treatment on the Microstructure and Properties of Welded Joints of 12Cr1MoV Steel in Service
周洪洋 1蒋涛 1刘群 1张炳奇 1孙越 1孙旭 1牛安平2
作者信息
- 1. 大唐东北电力试验研究院有限公司,吉林 长春 130012
- 2. 辽宁大唐国际沈东热电有限责任公司,辽宁 沈阳 110172
- 折叠
摘要
Abstract
In this paper,ultrasonic impact treatment(UIT)technology was used to strengthen the surface of 12Cr1MoV steel welded joints in service.The changes in surface morphology,microstructure,and microhardness under different treatment parameters were analyzed.The evolution behavior of the deformed layer on the surface of the sample was compared and ana-lyzed using transmission electron microscopy(TEM)and electron backscatter diffraction(EBSD)techniques.The results show that ultrasonic impact treatment can improve the geometric morphology of the weld toe area of 12Cr1MoV steel welded joints in service,and increase the geometric transition radius and hardness value at the weld toe.Compared to the as-received sample,when using UIT1 and UIT2 parameters,the transition radius at the weld toe increased by 108.2%and 116.4%,respectively.Correspondingly,the average hardness at the weld toe increased by 32.3%and 34.9%(within a depth of 0.1mm from the surface).In addition,it has been confirmed through experiments that ultrasonic impact treatment can in-troduce a gradient nanocrystalline structure layer on the surface of the welded joint of 12Cr1MoV steel in service,and the nanocrystallization of the grains is mainly achieved through dislocation slip.关键词
超声冲击/12Cr1MoV钢/微观组织/纳米晶/位错滑移Key words
ultrasonic impact treatment/12Cr1MoV steel/microstructure/nanocrystal/dislocation slip分类
矿业与冶金引用本文复制引用
周洪洋,蒋涛,刘群,张炳奇,孙越,孙旭,牛安平..超声冲击处理对服役态12Cr1MoV钢焊接接头的组织结构与性能影响[J].电焊机,2023,53(12):101-106,6.
