Forming condition and control strategy of ferrite decarburization in 60Si2MnA spring steel wires for automotive suspensions |
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Authors: | Chao-lei Zhang Ya-zheng Liu Le-yu Zhou Chao Jiang Jin-fu Xiao |
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Institution: | 1.School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing,China |
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Abstract: | The ferrite decarburization behavior of 60Si2MnA spring steel wires for automotive suspensions, including the forming condition
and the influence of heating time and cooling rate after hot rolling, was investigated comprehensively. Also, a control strategy
during the reheating process and cooling process after rolling was put forward to protect against ferrite decarburization.
The results show that ferrite decarburization, which has the strong temperature dependence due to phase transformation, is
produced between 675 and 875°C. The maximum depth is found at 750°C. Heating time and cooling rate after rolling have an important
influence on decarburization. Reasonable preheating temperature in the billet reheating process and austenitizing temperature
in the heat-treatment process are suggested to protect against ferrite decarburization. |
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