A method of controlled cooling after rolling of spring steel wire rod
A technology of spring steel and steel wire rod, applied in metal rolling, metal rolling, temperature control and other directions, can solve the problem of reducing the performance difference of the same circle, and achieve the improvement of the area shrinkage rate, the improvement of the depth of the decarburization layer, and the decarburization Good layer uniformity
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Embodiment 1
[0035] In the present embodiment, the spring steel grade is 55SiCr, the diameter specification is After the coil is rolled, the spit wire is controlled according to the following parameters: the wire spitting temperature of the wire is 860 °C; The temperature of the wire when entering the EDC sink: 820 °C; Water bath temperature: 95 °C; Packing outlet water temperature: 560 °C; Compressed air flow pressure at the bottom of the sink: 0.5 MPa.
[0036] The tensile strength of the steel spring steel wire rod produced in the present embodiment is 1000~1150MPa, the cross-sectional shrinkage rate is ≥40%, the performance of the same circle is less than 60MPa, the structure is uniform and there is no martensitic, bainite and other low-temperature structure, the decarburization layer of the wire rod is below 60 microns and the control is uniform, which well meets the technical requirements of the user for the spring steel wire rod.
Embodiment 2
[0038] In the present embodiment, the spring steel grade is 55SiCr, the diameter specification is After the coil is rolled, the spit wire is controlled according to the following parameters: the wire spitting temperature of the wire is 850 °C; The winding bar temperature when entering the EDC sink: 810 °C; Water bath temperature: 96 °C; Feed water temperature of the wire: 570 °C; Compressed air flow pressure at the bottom of the sink: 0.8MPa.
[0039] The tensile strength of the spring steel wire rod produced in the present embodiment is 1000~ 1150MPa, the cross-sectional shrinkage rate is ≥40%, the performance of the same circle is poor by 60MPa or less, the structure is uniform and there is no low temperature structure such as martensite and bainite, and the decarburization layer of the wire rod is below 60 microns and the control is uniform, which well meets the technical requirements of the user for the spring steel wire.
Embodiment 3
[0041] In the present embodiment, the spring steel grade is 55SiCr, the diameter specification is After the coil is rolled, the spit wire is controlled according to the following parameters: the wire spitting temperature of the wire is 840 °C; The temperature of the wire when entering the EDC sink: 820 °C; Water bath temperature: 100 °C; Feed water temperature of the wire: 580 °C; Compressed air flow pressure at the bottom of the sink: 1.0MPa.
[0042] The tensile strength of the spring steel wire rod produced in the present embodiment is 1050~1150MPa, the cross-sectional shrinkage rate is ≥40%, the performance of the same circle is poor by 60MPa or less, the organization is uniform and there is no low-temperature structure such as martensitic and bainite, and the decarburization layer of the wire rod is below 70 microns and the control is uniform, which well meets the technical requirements of the user for the spring steel wire rod.
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Abstract
Description
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Application Information
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