Process for quenching of prestressed steel strands

Abstract

The present application provides a prestressed steel strand quenching process, relates to the technical field of steel strand quenching process, and comprises a pretreatment unit for surface treatment of the steel strand; a magnetic field heating unit, which is internally provided with a temperature control module and a magnetic field generating module, can heat the steel strand to 850-950 DEG C and maintain for 10-30 minutes, and simultaneously applies an axial gradient magnetic field of 0.1-0.5 T; a gradient cooling unit, which is sequentially provided with a gas cooling section and a liquid cooling section along the conveying direction of the steel strand, the cooling rate of the gas cooling section is 25-35 DEG C / s, and the cooling rate of the liquid cooling section is 50-70 DEG C / s; and a conveying unit for driving the steel strand to sequentially pass through the above units. Through the synergistic effect of the pretreatment unit, the magnetic field heating unit, the gradient cooling unit and the conveying unit, the present application realizes the continuous and accurate treatment of the steel strand from surface treatment to heating and cooling, and solves the problem that the strength and toughness are difficult to balance in the single cooling mode of the traditional process.

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