An Investigation of Macro-Calcium Steel with High-Hardness and High-Toughness

Li Chengji; Lu Feng; Cao Fengyu; Zhang Yongxiang; Chen Yonggang

doi:10.13374/j.issn1001-053x.1993.01.007

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Li Chengji, Lu Feng, Cao Fengyu, Zhang Yongxiang, Chen Yonggang. An Investigation of Macro-Calcium Steel with High-Hardness and High-Toughness[J]. Chinese Journal of Engineering, 1993, 15(1): 38-42. doi: 10.13374/j.issn1001-053x.1993.01.007

Citation:

Li Chengji, Lu Feng, Cao Fengyu, Zhang Yongxiang, Chen Yonggang. An Investigation of Macro-Calcium Steel with High-Hardness and High-Toughness[J]. Chinese Journal of Engineering, 1993, 15(1): 38-42. doi: 10.13374/j.issn1001-053x.1993.01.007

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An Investigation of Macro-Calcium Steel with High-Hardness and High-Toughness

doi: 10.13374/j.issn1001-053x.1993.01.007

1. University of Sciencc and Technology Beijing;
2. Beijing Institute of Machine Tool

Received Date: 1992-06-20
Available Online: 2021-10-18

Abstract

Abstract

The effects of chemical composition and heat-treatment on the impact toughness of a new type of micro-calcium steel with high-hardness (HRC> 58) and high-toughness (a_k> 40J/cm²) have been investigated. The results show that the micro-calcium play an important role in the improving of impact toughness of quened-tempered steels. The impact toughness of steels were also controlled by the content of chromium and the ratio of copper/silicon in steels.
- high-hardness and high-toughness steel,
- micro-alloying of calcium,
- grain boundary segregation,
- ratio of Cu/Si