Development of 60Si2CrVNb High Tensile Strength Spring Steel

Abstract:

A production process of high tensile strength spring steel is discussed in this paper. Sufficient aluminum was added into ladle during tapping and barium alloy was used in late refining process. It was found that the refining slag with high basicity is strongly deoxidized after refining, with total oxygen content being less than 10×10^-6 in billet. Thus, the oxide inclusions in the steel is finished the transformation during refining and some complex oxide inclusions are remarkably removed at steelmaking temperature. The tensile strength over 2.0GPa and the extension rate up to 10% are obtained for the spring steel after quenching temperature at 900oC and tempering at 410 oC. So, the strength and plasticity of the steel are improved obviously.

• Periodical: Advanced Materials Research (Volume 744)
• Pages: 379-382
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.744.379
• Online since: August 2013
• Authors: Xiao Dong Wu, Rui Long Chen, Bo Xiao, Zhong Ying Wang
• Keywords: Extension Rate, Heat Treatment Process, Inclusion, Spring Steel, Tensile Strength

References

[1] Wang Y F, Wen G H, Tang P, etc. Iron and Steel, 2006; 41: 27.

[2] ZHANG Chunhong, HUANG Pinghui, TIAN Qiaoli. China Metallurgy, 2006, 16(7): 13~15.

[3] Yu Q B, Wang Z D, Liu X H, Wang G D. Mater Sci Eng, 2004; A379: 384.

[4] Park J S, Lee Y K. Scr Mater, 2007; 57: 109.

[5] Nam W J, Lee C S, Ban D Y. Mater Sci Eng, 2000; A289: 8.

[6] Zhang J M, Yang Z G, Li S X, Li G Y, Hui W J, Weng Y Q. Acta Metall Sin; 2006; 42: 259.

[7] Zhang B, Wang F M, Wu H L, Li C R. Heat Treatment of Metals; 2011; 36: 29.