Effects of Austenitizing Temperature and Cooling Rate on the Mechanical Properties of 36MnVS4 Steel for Automobile Engine Connecting Rod

Jun Ru Li; Xiao Hang Sun; Yan Ji; Lie Chen; Guang Lei Liu; Zhi Lin Wang; Ya Zheng Liu

doi:10.4028/www.scientific.net/MSF.898.1195

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HomeMaterials Science ForumMaterials Science Forum Vol. 898Effects of Austenitizing Temperature and Cooling...

Effects of Austenitizing Temperature and Cooling Rate on the Mechanical Properties of 36MnVS4 Steel for Automobile Engine Connecting Rod

Abstract:

The relationship between microstructure and mechanical properties of 36MnVS4 steel was studied. Different prior austenite grain sizes were obtained by austenitizing at 850, 950 and 1050 °C, respectively, and different ferrite contents were obtained by different cooling rates. Austenitizing temperature mainly influenced the grain size. With the austenitizing temperature increasing, grain size increased and the phase transformation starting temperature increased. Also, the strength increased and the plasticity and toughness decreased. Cooling rate mainly influenced the microstructure percentage. With the cooling rate increasing, ferrite percentage decreased and pearlite percentage increased. And meanwhile, the strength increased and ductility and toughness decreased. Microstructure had a significant influence on fracture splitting properties. With the grain size increasing, fracture splitting properties were markedly improved. With the ferrite percentage increasing and pearlite percentage decreasing, fracture splitting properties were worsened.

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Periodical:

Materials Science Forum (Volume 898)

Pages:

1195-1201

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.898.1195

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Online since:

June 2017

Authors:

Jun Ru Li, Xiao Hang Sun, Yan Ji, Lie Chen, Guang Lei Liu, Zhi Lin Wang, Ya Zheng Liu*

Keywords:

36MnVS4 Steel, Fracture Splitting, Heat Treatment, Mechanical Properties

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