The Research and Development of High Strength Spring Steel with Long Service Life

Abstract:

The research centers on the production process of high tensile 60Si2CrVNb spring steel for long service life with reference to the production conditions. Key points of the research lies in: long fatigue life and control techniques of non-metallic inclusions in melting process. Hot treatment process of spring steel also involves with the research, aiming to increase the strength of material by fining grain size by Nb element. The results confirms to the size of non-metallic inclusions can be controlled below 10μm with adoption of technologies of LF slag control and barium microalloy treatment in steelmaking process. The tensile strength can be over 2.0GPa and the elongation can reach up to 10% in the event that the quenching temperature is900°C and the tempering temperature is 410°C resulting obvious increase of strength and plasticity of spring steel.

• Periodical: Key Engineering Materials (Volumes 575-576)
• Pages: 365-369
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.575-576.365
• Online since: September 2013
• Authors: Bo Xiao, Yu Cheng Lei, Xiao Dong Wu
• Keywords: Elongation, High Strength, Hot Treatment Process, Non-Metallic Inclusion, Spring Steel, Tensile Strength

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