Effect of medium/high temperature tempering on the strength and fatigue properties of 60Si2CrV spring steel
FENG Yonghua
LIU Zhuo
LIANG Haixiao
CHEN Zhi
HUANG Shuaizong
CAO Qingda
GONG Yanjun
WEI Chaozhang
SHI Lubing
Abstract：[Objective]Aims to investigate the lack of test data and microscopic mechanism analysis of 60Si2CrV spring steel under high-temperature tempering.A systematic comparison was conducted between medium-temperature(420℃)and high-temperature(580℃)tempering.[Methods]Multidimensional test methods,including uniaxial tensile,impact,three-point bending fatigue,and hardenability tests,were employed to evaluate mechanical properties.Microstructures and fractures were observed via SEM to clarify the strengthening and toughening mechanisms.[Results]The results indicate that medium-temperature tempering yields high strength but low ductility and toughness.High-temperature tempering significantly enhances plastic deformation and impact toughness.Notably,the fatigue ultimate strength of high-temperature tempered samples reaches 951.6 MPa,11.6%higher than that of medium-temperature samples(853.4 MPa).Microstructural analysis shows typical tempered troostite after medium-temperature tempering and tempered sorbite after high-temperature tempering.The latter achieves a superior balance of strength,plasticity,and toughness.
Keywords：60Si2CrVSpring steelTemperingMechanical propertyHardenability
Publication Date：2026-01-31
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：9( 100-108 )