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Metals 2017, 7(4), 149; doi:10.3390/met7040149

Effect of Parameters on Internal Crack Healing in 30Cr2Ni4MoV Steel for 600-Ton Ultra-Super Ingots

1,2,3
,
1,2
and
1,2,*
1
Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China
2
Key Laboratory for Advanced Materials Processing Technology of Ministry of Education, Tsinghua University, Beijing 100084, China
3
HBIS Group Technology Research Institute, Shijiazhuang 050023, China
*
Author to whom correspondence should be addressed.
Received: 21 March 2017 / Revised: 15 April 2017 / Accepted: 19 April 2017 / Published: 21 April 2017
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Abstract

The effect of parameters on internal crack healing in 30Cr2Ni4MoV steel for 600-ton ultra-super ingots was systematically investigated. The results show that the degree of crack healing increases with increasing healing temperature, holding time, reduction ratio, and hot pressure, and with decreasing strain rate. Internal crack healing in 30Cr2Ni4MoV steel should be conducted at less than 1200 °C to avoid grain coarsening. Hot pressure, in the high-temperature elastic zone and perpendicular to the crack faces, not only promotes the rapid crack healing, but also prevents grain coarsening of the matrix. View Full-Text
Keywords: crack healing; 30Cr2Ni4MoV steel; ultra-super ingots; hot pressure; high temperature elastic zone; grain coarsening crack healing; 30Cr2Ni4MoV steel; ultra-super ingots; hot pressure; high temperature elastic zone; grain coarsening
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Xin, R.; Luo, J.; Ma, Q. Effect of Parameters on Internal Crack Healing in 30Cr2Ni4MoV Steel for 600-Ton Ultra-Super Ingots. Metals 2017, 7, 149.

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