Micro-analysis of the healing area of inner cracks in a 16Mn steel

ZHANG Yongjun; HAN Jingtao; REN Xiuping; ZHAO Zhongli

doi:10.13374/j.issn1001-053x.2006.02.030

Volume 28 Issue 2

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ZHANG Yongjun, HAN Jingtao, REN Xiuping, ZHAO Zhongli. Micro-analysis of the healing area of inner cracks in a 16Mn steel[J]. Chinese Journal of Engineering, 2006, 28(2): 129-132,162. doi: 10.13374/j.issn1001-053x.2006.02.030

Citation:

ZHANG Yongjun, HAN Jingtao, REN Xiuping, ZHAO Zhongli. Micro-analysis of the healing area of inner cracks in a 16Mn steel[J]. Chinese Journal of Engineering, 2006, 28(2): 129-132,162. doi: 10.13374/j.issn1001-053x.2006.02.030

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Micro-analysis of the healing area of inner cracks in a 16Mn steel

doi: 10.13374/j.issn1001-053x.2006.02.030

1. Materials Science and Engineering school, University of Science Technology Beijing, Beijing 100083, China;
2. Shougang Research institute of Technology, Beijing 100041, China;
3. China Metallurgical Information and Standardization Research Institute, Beijing 100730, China

Received Date: 2005-05-23
Rev Recd Date: 2005-10-28

Available Online: 2021-08-24

Abstract

Abstract

Healing processing of 16Mn steel samples was carried out. The healing area of internal cracks made by compressing a drilled hole was observed and analyzed. SEM analysis displayed that the fine structure in the healing area is mostly ferrite and there exists many polyangular grains of several hundreds nanometer. Vickers hardness tests showed that the hardness of ferrite in the healing area is higher than that in the matrix, which may result from strengthening of polyangular grains.
- metal,
- inner crack,
- healing,
- fine structure