摘要
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0.4~0.7μm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。
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—0.7μm range,providing a large number of potential nucleation spot for acicular ferrite(AF),so improving the impact absorbing energy of deposited metal.
作者
苏小虎
栗卓新
马思鸣
李红
张天理
KIM Hee Jin
SU Xiaohu;LI Zhuoxin;MA Siming;LI Hong;ZHANG Tianli;KIM Hee Jin(College of Materials Science and Engineering,Beijing University of Technology,Beijing 100124,China;School of Materials Engineering,Shanghai University of Engineering Science,Shanghai 201620,China;Advanced Joining Research Team,Korea Institute of Industrial Technology,Cheonan-si 330-825,Korea)
出处
《材料导报》
EI
CAS
CSCD
北大核心
2020年第11期11049-11052,共4页
Materials Reports
基金
国家自然科学基金(51574011)。
关键词
氧含量
微合金化
夹杂物
熔敷金属
冲击韧性
oxygen content
microalloying
inclusions
deposited metal
impact toughness
