Effect of different welding energy on microstructure and toughness of HAZ of low carbon bainitic steel
文献类型:期刊论文
作者 | Wang, Hong1; Yang, Liang2 |
刊名 | INTERNATIONAL JOURNAL OF MODERN PHYSICS B |
出版日期 | 2020-12-30 |
卷号 | 34期号:32 |
ISSN号 | 0217-9792;1793-6578 |
关键词 | LCBS heat affect zone impact toughness heat input |
DOI | 10.1142/S0217979220503191 |
产权排序 | 1 |
英文摘要 | Low carbon bainitic steel (LCBS) with excellent combined properties is the first choice for materials of pipeline transiting geological disaster. However, welding will worsen its toughness. In this paper, three kinds of welding heat input were designed to study the relationship between the toughness and microstructure in the coarse grain zone of welding heat affect zone (CGHAZ) of LCBS. The evolution characteristics of the microstructure of LCBS and the CGHAZ, and impact fracture were investigated by optical microscopy (OM), scanning electron microscopy (SEM). The results indicated that microstructure of LCBS consists mainly of bainite ferrite (BF) and granular bainite (GB). Heat input for 22 kJ/cm, the original austenite grains become coarsening, the microstructure is a small amount of quasi polygonal ferrite (QF) and polygonal ferrite (PF), which exhibits low Charpy impact toughness. However, for heat input of 19 kJ/cm, the degree of grain coarsening is small and distribution of martensite-austenite (M-A) constituents is the chain. The statistics of image software show that with the increase of heat input (16-22 kJ/cm), the average grain size of original austenite is basically the same (25 um), which is mainly due to Nb solute drag restraint the growth of austenite grain. |
语种 | 英语 |
出版者 | WORLD SCIENTIFIC PUBL CO PTE LTD |
WOS记录号 | WOS:000603659400015 |
源URL | [http://ir.opt.ac.cn/handle/181661/94253] |
专题 | 西安光学精密机械研究所_月球与深空探测技术研究室 |
通讯作者 | Yang, Liang |
作者单位 | 1.Chinese Acad Sci, Xian Inst Opt & Precis Mech, Xian 710119, Peoples R China 2.Xi An Jiao Tong Univ, Sch Mech Engn, Xian 710049, Peoples R China |
推荐引用方式 GB/T 7714 | Wang, Hong,Yang, Liang. Effect of different welding energy on microstructure and toughness of HAZ of low carbon bainitic steel[J]. INTERNATIONAL JOURNAL OF MODERN PHYSICS B,2020,34(32). |
APA | Wang, Hong,&Yang, Liang.(2020).Effect of different welding energy on microstructure and toughness of HAZ of low carbon bainitic steel.INTERNATIONAL JOURNAL OF MODERN PHYSICS B,34(32). |
MLA | Wang, Hong,et al."Effect of different welding energy on microstructure and toughness of HAZ of low carbon bainitic steel".INTERNATIONAL JOURNAL OF MODERN PHYSICS B 34.32(2020). |
入库方式: OAI收割
来源:西安光学精密机械研究所
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