Special Features of Formation of Structure and Properties of Low-Carbon Martensitic Steel 12Kh2G2NMFT

The structure and mechanical properties of steel 12Kh2G2NMFT after continuous cooling at a rate of 600 - 0.035 K/sec and after cooling with isothermal holds in a temperature range of 300 - 650°C are investigated. It is shown that a lath martensite structure with a high level of strength and ductilit...

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Bibliographic Details
Published in:Metal science and heat treatment 2003-03, Vol.45 (3-4), p.88-90
Main Authors: Kamenskikh, A P, Zayats, L Ts, Kleiner, L M, Simonov, Yu N
Format: Article
Language:English
Subjects:
Alloys
Cooling
Cooling rate
Iron and steel industry
Martensite
Martensitic stainless steels
Mechanical properties
Microstructure
Steel making
Structural steels
Tempering
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Summary:The structure and mechanical properties of steel 12Kh2G2NMFT after continuous cooling at a rate of 600 - 0.035 K/sec and after cooling with isothermal holds in a temperature range of 300 - 650°C are investigated. It is shown that a lath martensite structure with a high level of strength and ductility is formed in a wide range of cooling conditions. The decrease in the impact toughness observed under isothermal conditions in a narrow temperature range below M^sub i^ (360 - 410°C) is shown to be connected with the processes of tempering of freshly formed isothermal martensite.[PUBLICATION ABSTRACT]
ISSN:0026-0673
1573-8973
DOI:10.1023/A:1024507302729