Study on the Law of Phrase Transformation of High-Carbon Matrix Steel 4Cr-3Mo-3V-2W

Abstract:

The study on the phase transformation law of High-Carbon Matrix steel 4Cr-3Mo-3V-2W-Ni-Nb, which is processed in different heat treatment, is conducted by means of metallographic observation, hardness determination and phase analysis conducted with the help of X-ray diffraction. The results indicate what is as follow: through quenching at 970°C, the main precipitations of alloy carbide are V₄WC₅, Cr₇C₃ and Fe₃W₃C at 200~300°C, V₄WC₅ and Cr₇C₃ at 400°C, V₄WC₅ and Cr₇C₃ at 500°C, V₄WC₅, Cr₇C₃ and Mn₂₃C₆ at 600°C. The transformation of residual austenite is thorough completed above 400 °C and the cause of secondary hardening is the precipitation of V₄WC₅ and V₄C_2.67.

• Periodical: Advanced Materials Research (Volumes 284-286)
• Pages: 1610-1614
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.284-286.1610
• Online since: July 2011
• Authors: Shun Sang Na, Jian Sha Chen, Chao Fu, Guo Tao Zhang, Qian Xu
• Keywords: Hardness, Matrix Steel, Phase Transformation, Precipitated Phase

References

[1] Na Shunsang．300 Questions about Metal Heat Treatment[M]．Beijing：Chemical Industry Press.2007, pp.167-170(In Chinese)

[2] Liu Yunxu.Principles of Metal Heat Treatment [M] ．Beijing:Mechanical Industry Press,1981, pp.97-100(In Chinese)

[3] Xiao Jimei. The question of Metallography about high-speed steel[M]．Beijing: Metallurgical Industry Press．1982,pp.12-16 (In Chinese)