Carbide precipitation and element distribution in high Co�CNi secondary hardening steel
Chen-chong Wang1,2 Chi Zhang2 Zhi-gang Yang2 Jie Su3
1 State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110819, Liaoning, China 2 Key Laboratory of Advanced Materials of Ministry of Education, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China 3 Institute for Structural Materials, Central Iron and Steel Research Institute, Beijing 100081, China
Carbide precipitation and element distribution in high Co�CNi secondary hardening steel
Chen-chong Wang1,2 Chi Zhang2 Zhi-gang Yang2 Jie Su3
1 State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110819, Liaoning, China 2 Key Laboratory of Advanced Materials of Ministry of Education, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China 3 Institute for Structural Materials, Central Iron and Steel Research Institute, Beijing 100081, China
ժҪ As the increasing need of the steels with both high strength and hydrogen embrittlement resistance ability, carbide precipitation and element distribution in high Co�CNi secondary hardening steel were concerned. Carbide precipitation and element distribution in M54 were observed using carbon replicas method. Both simulation and observation results showed that MC and M2C formed in the steel. MC was round particle, which would act as grain refiners. And M2C was needle-like phase, which would be remarkable strengthening phases. Nb and V were main metallic elements in MC phase. Mo and Cr were main metallic elements in M2C phase. W, Co, and Ni were probably mainly dissolved in the matrix. As the carbide precipitation in AerMet100 was M2C, which had similar size and shape with M2C in M54, the tensile strength and yield strength of AerMet100 and M54 were similar. Compared with traditional high Co�CNi secondary hardening steel, M54 had higher hydrogen embrittlement resistance ability, probably because of element W in the matrix.
Abstract��As the increasing need of the steels with both high strength and hydrogen embrittlement resistance ability, carbide precipitation and element distribution in high Co�CNi secondary hardening steel were concerned. Carbide precipitation and element distribution in M54 were observed using carbon replicas method. Both simulation and observation results showed that MC and M2C formed in the steel. MC was round particle, which would act as grain refiners. And M2C was needle-like phase, which would be remarkable strengthening phases. Nb and V were main metallic elements in MC phase. Mo and Cr were main metallic elements in M2C phase. W, Co, and Ni were probably mainly dissolved in the matrix. As the carbide precipitation in AerMet100 was M2C, which had similar size and shape with M2C in M54, the tensile strength and yield strength of AerMet100 and M54 were similar. Compared with traditional high Co�CNi secondary hardening steel, M54 had higher hydrogen embrittlement resistance ability, probably because of element W in the matrix.
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Chen-chong Wang, Chi Zhang Zhi-gang Yang Jie Su. Carbide precipitation and element distribution in high Co�CNi secondary hardening steel[J].Journal of Iron and Steel Research International, 2018, 25(3): 340-346.
Chen-chong Wang, Chi Zhang Zhi-gang Yang Jie Su. Carbide precipitation and element distribution in high Co�CNi secondary hardening steel. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2018, 25(3): 340-346.
