Influence of Ca treatment on particle-microstructure relationship in heat-affected zone of shipbuilding steel with Zr-Ti deoxidation after high-heat-input welding
作者机构：Technology Research InstituteHBIS GroupShijiazhuang 050023HebeiChina Beijing Key Laboratory of Pipeline Critical Technology and Equipment for Deepwater Oil and Gas DevelopmentBeijing Institute of Petrochemical TechnologyBeijing 102617China Department of Material EngineeringHebei Vocational University of Industry and TechnologyShijiazhuang 050091HebeiChina HBIS Company LimitedShijiazhuang 050023HebeiChina School of Metallurgical and Ecological EngineeringUniversity of Science and Technology BeijingBeijing 100083China HBIS Group Shisteel CompanyShijiazhuang 050031HebeiChina
出 版 物：《Journal of Iron and Steel Research(International)》 (钢铁研究学报（英文版）)
年 卷 期：2022年第29卷第8期
页 面：1291-1298页
核心收录：
学科分类：08[工学] 0806[工学-冶金工程] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学]
基 金：supported by the Open Project Program of Bejing Key Laboratory of Pipeline Critical Technology and Equipment forDeepwater Oil&Gas Development(Grant No.BIPT2019001) the Natural Science Foundation of Hebei Province(Grant No.E2021318004)。
主 题：Shipbuilding steel Heat-affected zone Impact toughness Microstructure Particle characterization
摘 要：The effects of Ca treatment on the particle, microstructure, and toughness of heat-affected zone (HAZ) of shipbuilding steel with Zr-Ti deoxidation after high-heat-input welding were investigated. The simulated welding at a high-heat-input welding of 200 kJ/cm was carried out using Gleeble-3800 welding simulation. Then, particle characteristics were characterized using an Aztec-Feature automatic particle analysis system. Additionally, an in-situ observation experiment was performed to study the relationships between particle and microstructure by high-temperature confocal laser scanning microscopy (HT-CLSM). The results indicated that the average HAZ toughness at -40 ℃ was increased from 183 to 290 J by adding 0.0026 wt.% Ca. Meanwhile, the formation of acicular ferrite ratio was increased from 49.34% to 60.28% due to the addition of Ca. The scanning electron microscopy results clearly showed that CaO-Al_(2)O_(3)-TiOx-ZrO_(2)-MnS particles could act as effective nucleation sites for the formation of acicular ferrite, which has been verified by the observation of the particle-microstructure relationship under HT-CLSM. Furthermore, particle characterization results show that the cumulative frequency of particles with the size of 1-3 lm was 33.2% in HAZ of Zr-Ti shipbuilding steel but 66.2% in HAZ of Zr-Ti-Ca shipbuilding steel.
维普期刊数据库