Thin-gauge steel for elevator, ferrite area rolling process of thin-gauge steel and application

Abstract

The invention relates to the technical field of steel and iron, in particular to thin-gauge steel for an elevator, a ferrite area rolling process of the thin-gauge steel and application. The steel for the elevator comprises the chemical components of 0.01%-0.05% of C, 0.01%-0.05% of Si, 0.10%-0.50% of Mn, smaller than or equal to 0.015% of S, smaller than or equal to 0.015% of P, smaller than or equal to 0.006% of N, smaller than or equal to 0.0030% of Ti, smaller than or equal to 0.0035% of Nb, 0.015%-0.040% of Alt and the balance Fe, the matrix structure is ferrite and cementite, and the thickness is 0.9-2.0 mm. The ferrite area rolling process comprises the steps of raw material selection, headless strip steel rolling and acid pickling flattening. The thin-gauge steel for the elevator can be used for manufacturing an elevator landing door. The mechanical property and the machining plate shape of the thin-gauge steel for the elevator are guaranteed through stable ferrite area rolling, and the purpose that cold is replaced by hot is achieved for the thin-gauge steel in the elevator industry.

Description

technical field [0001] The invention relates to the technical field of iron and steel, in particular to a thin-gauge elevator steel and a rolling process and application thereof in a ferrite area. Background technique [0002] Elevator steel has high requirements on steel surface quality and plate shape, and in order to meet the needs of use, the thickness of elevator steel generally needs to be controlled within the range of 0.9 to 2.0mm. At present, the process of producing elevator steel by cold rolling is relatively mature, and the cost is relatively high. Based on the current situation of fierce competition and low profit in the elevator industry, there is an urgent need for a cheaper product to replace cold rolled strip. [0003] "Substituting heat for cooling" is one of the main directions of the current development of elevator steel production technology, but no substantial progress has been made yet. Traditional hot rolling and CSP process are two common hot rollin...

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Problems solved by technology

[0004] In the process of "replacing heat with heat" in the elevator industry, the austenitic products produced by ESP rolling have the problems of bending springback and angle deviation due to their insufficient performance, and are prone to appear due to poor plate shape, especially after cutting. warping, resulting in the problem of excessive unevenness, the invention provides a thin-gauge elevator steel and its ferrite zone rolling process and application, through stable ferrite zone rolling to ensure the mechanical properties of thin-gauge elevator steel Compared with the austenitic products rolled by ESP process, the steel for thin gauge elevators provided by the present invention has reduced internal stress, improved plate shape, and good bending performance, and has achieved 0.9-2.0mm thinner steel in the elevator industry. "Replacing cold with heat" of standard steel can replace traditional cold-rolled plates in large quantities, significantly reducing the purchase cost of elevator manufacturers

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