EFFECT OF TEMPERATURE AT DUAL PHASE REGION ON MICROSTRUCTURE AND MECHANICAL PROPERTIES OF CB400 STEEL
No. 70 (2022), Science - Technology
No. 70 (2022)

EFFECT OF TEMPERATURE AT DUAL PHASE REGION ON MICROSTRUCTURE AND MECHANICAL PROPERTIES OF CB400 STEEL

Science - Technology
Published 2022-05-30
VAN TRAN THI THANH
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Keywords

Dual phase, martensite, ferrite, thermodynamics. Thép song pha, mactenxit, ferit, nhiệt động học.

How to Cite

TRẦN THỊ THANH, V. (2022). EFFECT OF TEMPERATURE AT DUAL PHASE REGION ON MICROSTRUCTURE AND MECHANICAL PROPERTIES OF CB400 STEEL. Journal of Marine Science and Technology, 70(70), 76–80. Retrieved from https://jmst.vimaru.edu.vn/index.php/tckhcnhh/article/view/14
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Abstract

In this work, the influence of heat treatment process in the dual phase region of CB400 steel was explored. Calculation results by thermodynamics and JmatPro software determined that temperature of phase transformation is in the range of 730-823oC for this steel. Analysis of the phase fraction showed that increasing the temperature of the dual phase heat treatment increased the martensitic fraction. With the treatment temperature at 790oC, the hardness result is 52.4HRC; strength is 960MPa and ductility is 16%. The microstructure shows that the martensite percentage is 25%; the grain of martensite is 8µm; ferrite is 12.5µm.

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