材料导报 2019, Vol. 33 Issue (Z2): 424-427
金属与金属基复合材料
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大热输入对焊条电弧焊低合金钢力学性能的影响
杨林, 熊建坤, 余勇, 文仲波, 聂甫恒, 杨东, 王东力, 冯雨来
东方电气集团东方汽轮机有限公司,德阳 618000
Effect of High Heat Input on Mechanical Properties of Low Alloy Steelby Electrode Arc Welding
YANG Lin, XIONG Jiankun, YU Yong, WEN Zhongbo, NIE Fuheng, YANG Dong, WANG Dongli, FENG Yulai
Dongfang Turbine Co., Ltd, Dongfang Electric Corporation,Deyang 618000
摘要 本工作研究了用E9015-B3焊材焊接ZG15Cr1Mo1V低合金钢的接头在大热输入条件下的组织与综合性能。结果表明:热输入的变化对焊接接头有一定的影响,随着热输入的增加,高温停留时间更长而冷却速度也降低,焊缝主要强化元素Cr、Mo等呈下降特征,焊缝出现明显的块状铁素体和粗大的贝氏体组织,降低了接头的常温和高温抗拉强度,其中当立向上焊接摆幅在30~50 mm时,焊接点热源对固定位置的高温停留时间影响最大,此时焊缝的综合力学性能最差。为了保证产品焊接接头的质量,需要在一定程度上控制焊接热输入,尤其需要在焊接摆幅为30~50 mm时选择较小的焊接电流。
关键词:
热输入
高温停留时间
摆幅
力学性能
Abstract: In this paper, the structure and comprehensive properties of ZG15Cr1Mo1V low alloy steel joints welded by E9015-B3 under high heat input were studied. The results show that the changes of heat input has a certain effect on the welded joint. The high temperature duration increased and the cooling rate decreased when the heat input were elevated,the main strengthening elements, such as Cr and Mo, were decreased,ob-vious massive ferrite and coarse bainite structure appeared in the welded seam, which reduced the normal and high temperature strength of the joint. When the vertical upward welding swing is 30—50 mm, the point heat source has the greatest influence on the high temperature duration of the specified position, and the comprehensive mechanical properties of the weld seam are the worst at this time. In order to ensure the quality of welded joints, it is necessary to control the heat input to a certain extent, especially to choose a smaller welding current in the 30—50 mm welding swing stage.
Key words:
heat input
high temperature duration
swing
mechanical properties
出版日期: 2019-11-25
发布日期: 2019-11-25
基金资助: 德阳市科技计划项目(2018CKJ004)
通讯作者:
dtcyanglin@dongfang.com
作者简介: 杨林,男,1986年生,硕士研究生。主要从事汽轮机耐热钢焊接及性能评价研究工作,已发表论文4篇。
引用本文:
杨林, 熊建坤, 余勇, 文仲波, 聂甫恒, 杨东, 王东力, 冯雨来. 大热输入对焊条电弧焊低合金钢力学性能的影响[J]. 材料导报, 2019, 33(Z2): 424-427.
YANG Lin, XIONG Jiankun, YU Yong, WEN Zhongbo, NIE Fuheng, YANG Dong, WANG Dongli, FENG Yulai. Effect of High Heat Input on Mechanical Properties of Low Alloy Steelby Electrode Arc Welding. Materials Reports, 2019, 33(Z2): 424-427.
链接本文:
http://www.mater-rep.com/CN/
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http://www.mater-rep.com/CN/Y2019/V33/IZ2/424
1 李小宝,张宇,潘鑫.钢铁研究学报,2013,25(9),52. 2 王元良,陈辉.焊接科学与工程,西南交通大学出版社,2008. 3 蒋庆磊.800 MPa高强钢GMAW接头组织性能及精细结构研究.博士学位论文,山东大学,2011. 4 马成勇,田志凌,杜则裕,等.焊接学报,2004,25(2),23. 5 孙占,黄继华,张华,等.焊接学报,2008,29(3),41. 6 余庆波,孙莹.机械工程学报,2009,45(12),284.
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