Bainite steel wheel for rail traffic passenger car and manufacturing method thereof
A technology of rail transit and bainitic steel, applied in the field of rail transit, can solve the problems of decreased toughness of wheels, corrosion of micro-batteries, and poor resistance to heat damage, etc., and achieve the effects of reducing friction coefficient, prolonging service life, and improving operating efficiency
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Embodiment 1
[0078] A kind of bainitic steel wheel for rail transit passenger car, contains the chemical composition as described in the embodiment 1 of table 2.
[0079] The manufacturing method is as follows: the molten steel whose chemical composition is shown in Example 1 in Table 2 is passed through the steelmaking process, the refining process, the vacuum degassing process, the round billet continuous casting process, the ingot cutting process, the forging and rolling process, the heat treatment process, processing, and finished product inspection. formed by the process. The heat treatment process is as follows: heating to 930°C for 4.0 hours, cooling the rim tread to 250-400°C with programmable water spray, and air cooling to room temperature.
[0080] Such as figure 2 As shown, the metallographic structure of the wheel rim prepared in this embodiment is mainly carbide-free bainite. The mechanical properties of the wheel in this embodiment are shown in Table 3, and the strength a...
Embodiment 2
[0082] A kind of bainitic steel wheel for rail transit passenger car, contains the chemical composition as described in the embodiment 1 of table 2.
[0083] The manufacturing method is as follows: the molten steel whose chemical composition is shown in Example 2 of Table 2 is passed through the steelmaking process, the refining process, the vacuum degassing process, the round billet continuous casting process, the ingot cutting process, the forging and rolling process, the heat treatment process, processing, and finished product inspection. formed by the process. The heat treatment process is as follows: heating to 936°C and keeping it warm for 4.3 hours, cooling the rim tread to 250-400°C with programmable spray water, and air cooling to room temperature, during which time the residual heat of the rim, web, and hub is used for self-tempering; and then Then heat to 250-360°C for medium and low temperature tempering for 4 hours, then air cool to room temperature after temperin...
Embodiment 3
[0087] A kind of bainitic steel wheel for rail transit passenger car, contains the chemical composition as described in the embodiment 1 of table 2.
[0088] The manufacturing method is as follows: the molten steel whose chemical composition is as shown in Table 2, Example 3, goes through the steelmaking process, the refining process, the vacuum degassing process, the round billet continuous casting process, the ingot cutting process, the forging and rolling process, the heat treatment process, processing, and finished product inspection. formed by the process. The heat treatment process is as follows: heating to 930°C for 4.0 hours, cooling the rim tread to 250-350°C by spraying water under programmable control, and air cooling to room temperature, during which the residual heat of the rim, web, and hub is used for self-tempering; and then Then heat to 300-400°C for medium and low temperature tempering for 3.3 hours, then air cool to room temperature after tempering.
[0089...
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