Wang Ningtao,Wang Lijun,Guo Juncheng,et al.Determination and Application of High Temperature Thermoplasticity and Continuous Cooling Transition(CCT) Curve of 16MnCr5[J].Special Steel,2023,44(04):120-124.
Wang Ningtao,Wang Lijun,Guo Juncheng,et al.Determination and Application of High Temperature Thermoplasticity and Continuous Cooling Transition(CCT) Curve of 16MnCr5[J].Special Steel,2023,44(04):120-124. DOI: 10.20057/j.1003-8620.2023-00007.
Determination and Application of High Temperature Thermoplasticity and Continuous Cooling Transition(CCT) Curve of 16MnCr5
The dynamic high temperature ductility test shows that 16MnCr5 steel does not appear brittleness in the second brittle zone (900-1 200 ℃), and the optimum deformation temperature is 800-1 050 ℃. The plasticity decreases between 600 and 750 ℃, corresponding to the third brittle zone.The continuous cooling transformation experiment shows that when 16MnCr5 steel is cooled at speed between 0.5-3 ℃/s, uniform ferrite and pearlite structure can be obtained; When the cooling speed is more than 5 ℃/s, bainite appears. The structure transformation of 16MnCr5 steel continuous casting billet cooled to 600 ℃ has just been completed or has not yet been completed, therefore the temperature of hot charging should be lower than 600 ℃ as far as possible. After 16MnCr5 wire rod is rolled, close the insulation cover for slow cooling, which is conducive to subsequent processing.After rolling 16 MnCr5 steel wire rods, the insulation cover is closed for slow cooling, which is used in the production of Φ30 mm large size 16 MnCr5 steel wire rod. The microstructure is F + P with grain size about 7.5, hardness about 80HRB, and uniform microstructure, which can meet the requirements of downstream customers for drawing and cold heading.
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