[1] Zhou Xuefeng, Fang Feng, Tu Yiyou, et al. Carbide refinement in M42 high speed steelby rare earth metals and spheroidizing treatment [J]. Journal of Southeast University (English Edition), 2014, 30 (4): 445-448. [doi:10.3969/j.issn.1003-7985.2014.04.008]

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Carbide refinement in M42 high speed steelby rare earth metals and spheroidizing treatment()

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

30

Issue:

2014 4

Page:

445-448

Research Field:

Materials Sciences and Engineering

Publishing date:

2014-12-31

Info

Title:

Carbide refinement in M42 high speed steelby rare earth metals and spheroidizing treatment

Author(s):

Zhou Xuefeng¹;  2;  Fang Feng¹;  Tu Yiyou¹;  Jiang Jianqing¹;  Zhu Wanglong²;  Yin Songyan³

¹Jiangsu Key Laboratory of Advanced Metallic Materials, Southeast University, Nanjing 211189, China
²Jiangsu Engineering Research Center of Tool and Die Steel, Danyang 212312, China
³Sunnywell New Material Technology Co. Ltd., Changzhou 213200, China

Keywords:

high speed steel;  rare earth metals;  carbide;  dimension;  spheroidization

PACS:

TG142.7

DOI:

10.3969/j.issn.1003-7985.2014.04.008

Abstract:

The influence of rare earth metals and heat treatment on the microstructure and performance of M42 steel has been investigated by means of an optical microscope(OM), scanning electron microscope(SEM), energy dispersive spectroscopy(EDS), transmission electron microscope(TEM), electron back-scatter diffraction(EBSD)and X-ray diffraction(XRD). The results show that M₂C is the prevailing type of eutectic carbides in M42 steel. After modification with rare earth metals, M₂C eutectic carbides change from the ordered lamellar structure into a circular structure. Despite different morphologies, the two carbides present the same characteristics of microstructure and growth orientation. Compared with lamellar carbides, M₂C carbides with the circular structure are much easier to decompose and spheroidize after heating, which remarkably refines the carbide dimensions. The refined carbides improve the supersaturation of alloying elements in martensite and increase the hardness of M42 steel by 1.5 HRC.

References:

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Memo

Memo:

Biography: Zhou Xuefeng(1982—), male, doctor, lecturer, xuefengzhou@seu.edu.cn.
Foundation items: The National Natural Science Foundation of China(No.51301038, 51201031, 51371050), the Industry-Academia-Research Cooperative Innovation Fund of Jiangsu Province(No.BY2014127-03), the Natural Science Foundation of Jiangsu Province(No.BK20141306), the Scientific and Technological Innovation Fund of Danyang(No.SY201305).
Citation: Zhou Xuefeng, Fang Feng, Tu Yiyou, et al.Carbide refinement in M42 high speed steel by rare earth metals and spheroidizing treatment[J].Journal of Southeast University(English Edition), 2014, 30(4):445-448.[doi:10.3969/j.issn.1003-7985.2014.04.008]

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