氧含量及夹杂物对高强钢金属芯焊丝E120C-K4熔敷金属冲击韧性的影响

doi:10.11896/cldb.19050057

材料导报

2020, Vol. 34

Issue (11): 11049-11052 https://doi.org/10.11896/cldb.19050057

材料与可持续发展（二）——材料绿色制造与加工

氧含量及夹杂物对高强钢金属芯焊丝E120C-K4熔敷金属冲击韧性的影响

苏小虎¹, 栗卓新¹, 马思鸣¹, 李红¹, 张天理², KIM Hee Jin³

1 北京工业大学材料科学与工程学院,北京 100124
2 上海工程技术大学材料工程学院,上海201620
3 韩国工业技术研究院高级熔焊研究组,天安 330-825,

Effect of Oxygen Content and Inclusions on Impact Toughness in Deposited Weld Metal of High Strength Steel Metal Cored Wire E120C-K4

SU Xiaohu¹, LI Zhuoxin¹, MA Siming¹, LI Hong¹, ZHANG Tianli², KIM Hee Jin³

1 College of Materials Science and Engineering,Beijing University of Technology,Beijing 100124,China
2 School of Materials Engineering, Shanghai University of Engineering Science, Shanghai 201620, China
3 Advanced Joining Research Team, Korea Institute of Industrial Technology, Cheonan-si 330-825, Korea

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摘要韩国
本工作通过改变保护气体配比和Zr-Ti、Ti-B微合金化研究了金属芯焊丝E120C-K4熔敷金属中的氧含量及夹杂物对其微观组织和冲击韧性的影响。研究表明:在金属芯焊丝E120C-K焊接熔敷金属中,随着氧含量的增加,熔敷金属组织晶粒尺寸增大,粒状贝氏体含量增加,夹杂物尺寸增大、含量增加,熔敷金属的冲击韧性明显降低;添加微量Zr-Ti微合金的熔敷金属中夹杂物面积在单位面积所占比例降低,夹杂物的平均粒径减小,尺寸集中于0.4~0.7 μm之间,为针状铁素体(AF)形核提供了潜在质点,从而提高了熔敷金属的冲击吸收功。

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关键词: 氧含量微合金化夹杂物熔敷金属冲击韧性

Abstract: In this work, the effects of oxygen content and inclusions on the microstructure and impact toughness of the metal-cored wire E120C-K4 deposited metal were studied by changing the shielding gas ratio and Zr-Ti, Ti-B microalloying.The results showed that: with the increase of oxygen content in deposited metal of metal cored wire E120C-K4, grain size of microstructure of deposited metal increased, which is similar incontent of granular bainite as well as the size and content of inclusions ,impact toughness drastically deteriorated. Under the combined effect of Zr and Ti, the proportion of inclusions per unit area in the deposited metal decreased, the average particle size of inclusions fell into 0.4—0.7 μm range, providing a large number of potential nucleation spot for acicular ferrite(AF), so improving the impact absorbing energy of deposited metal.

Key words: oxygen content microalloying inclusions deposited metal impact toughness

发布日期: 2020-05-13

ZTFLH:

TG424

基金资助: 国家自然科学基金(51574011)

通讯作者: 13910321588@139.com

作者简介: 苏小虎,2019年6月毕业于北京工业大学,获得工程硕士学位,主要从事高强钢焊接材料以及金属焊接方面的研究。
栗卓新,北京工业大学材料学院,教授,博士研究生导师。主要研究方向为基于统计分析的焊接冶金与材料优化设计及质量控制、轻金属的精密连接、纳米热喷涂等。在国内外重要期刊发表文章235篇,授权发明专利49项。

引用本文:

苏小虎, 栗卓新, 马思鸣, 李红, 张天理, KIM Hee Jin. 氧含量及夹杂物对高强钢金属芯焊丝E120C-K4熔敷金属冲击韧性的影响[J]. 材料导报, 2020, 34(11): 11049-11052.
SU Xiaohu, LI Zhuoxin, MA Siming, LI Hong, ZHANG Tianli, KIM Hee Jin. Effect of Oxygen Content and Inclusions on Impact Toughness in Deposited Weld Metal of High Strength Steel Metal Cored Wire E120C-K4. Materials Reports, 2020, 34(11): 11049-11052.

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http://www.mater-rep.com/CN/10.11896/cldb.19050057 或 http://www.mater-rep.com/CN/Y2020/V34/I11/11049

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