Ni-Cr-Mo-B超厚钢板表面低碳回火马氏体组织的韧性研究

doi:10.3724/SP.J.1037.2011.00698

金属学报

2012, Vol. 48

Issue (4): 401-406 DOI: 10.3724/SP.J.1037.2011.00698

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Ni-Cr-Mo-B超厚钢板表面低碳回火马氏体组织的韧性研究

王小勇¹,潘涛¹,王华²,苏航¹,李向阳³,曹兴忠⁴

1. 钢铁研究总院结构材料研究所, 北京 100081
2. 鞍钢股份有限公司, 鞍山 114021
3. 中国钢研科技集团, 北京 100081
4. 中国科学院高能物理研究所, 北京 100049

INVESTIGATION OF THE TOUGHNESS OF LOW CARBON TEMPERED MARTENSITE IN THE SURFACE OF Ni-Cr-Mo-B ULTRA-HEAVY PLATE STEEL

WANG Xiaoyong¹, PAN Tao¹, WANG Hua², SU Hang¹,LI Xiangyang³, CAO Xingzhong⁴

1. Division of Structural Materials, Central Iron and Steel Research Institute, Beijing 100081
2. Angang Steel Company Limited, Anshan 114021
3. China Iron and Steel Research Institute Group, Beijing 100081
4. Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049

引用本文:

王小勇,潘涛,王华,苏航,李向阳,曹兴忠. Ni-Cr-Mo-B超厚钢板表面低碳回火马氏体组织的韧性研究[J]. 金属学报, 2012, 48(4): 401-406.
, , , , , . INVESTIGATION OF THE TOUGHNESS OF LOW CARBON TEMPERED MARTENSITE IN THE SURFACE OF Ni-Cr-Mo-B ULTRA-HEAVY PLATE STEEL[J]. Acta Metall Sin, 2012, 48(4): 401-406.

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摘要: 研究了Ni-Cr-Mo-B超厚钢板表面低碳回火马氏体组织. 对表面区域不同位置处取样进行了冲击性能测试, 并借助OM, SEM, EBSD, XRD和正电子湮没谱(PAS)等技术手段对马氏体组织及其亚结构进行了研究. 结果表明,实验钢表面韧性异常恶化, 马氏体组织中相对粗大的板条束和板条块以及较高的位错密度是其表面韧性恶化的主要原因.

Abstract：Low carbon tempered martensite structures in the surface of Ni-Cr-Mo-B ultra-heavy plate steel was studied. The toughness at different locations in the surface zone was investigated by impact testing, and the sub-microstructures, such as packets and blocks of the martensite, at different distances (3, 15 and 25 mm) from the surface were observed by OM, SEM and electron backscattered diffraction (EBSD), and the dislocation density were tested by XRD and positron annihilation spectroscopy (PAS). The results indicate that the toughness of the tested steel in the 10 mm from the surface deteriorates sharply, which is mainly due to the bigger packet and block size and higher dislocation density in the tempered martensite.

Key words： ultra-heavy plate steel EBSD positron annihilation spectroscopy (PAS) dislocation density

收稿日期: 2011-11-09

作者简介: 王小勇, 男, 1984年生, 博士生

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https://www.ams.org.cn/CN/10.3724/SP.J.1037.2011.00698 或 https://www.ams.org.cn/CN/Y2012/V48/I4/401

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