A color-coated cold-rolled substrate for home appliance panels and its manufacturing method

Abstract

The invention discloses a color-coated cold-rolled baseplate used for a household appliance panel and a manufacturing method of the color-coated cold-rolled baseplate. The cold-rolled baseplate is manufactured by a plate blank consisting of the following ingredients by weight percentage: 0.0035-0.0065% of C, less than or equal to 0.009% of Si, 0.38-0.48% of Mn, 0.040-0.056% of P, less than or equal to 0.009% of S, 0.035-0.055% of Al, 0.045-0.055% of Ti, less than or equal to 0.0036% of N, and the balance being Fe. The method is characterized in that the plate blank is heated, and subjected to rough rolling and precision rolling to form a hot-rolled plate; a coiling temperature is 670-720 degrees; a hot-rolled coil is subjected to cold rolling; the temperature of a soaking zone of a continuous annealing furnace is 765-780 degrees; the elongation of temper rolling is 0.45-0.58%; the withdrawal and straightening elongation is 0.05-0.15%; the roughness of a working roll for the temper rolling is 1.3-1.7 micrometers; and a peak count (Pc) of the working roll for the temper rolling is greater than or equal to 120. With the adoption of the design ingredients and the manufacturing method, the color-coated cold-rolled baseplate with good deep drawability, low cost, ageing resistance and excellent dent resistance is obtained, and higher requirements of the household appliance panel are met.

Description

technical field

[0001] The invention relates to the technical field of metal material manufacturing, in particular to the technical field of cold-rolled steel strip manufacturing, in particular to a color-coated cold-rolled substrate for home appliance panels and a manufacturing method thereof. Background technique

[0002] The panels of household appliances require high surface finish after color coating, as well as certain strength and deep drawing performance, and the general thickness is 0.50mm to 2.5mm. Since the substrate needs to go through the baking and curing process at 200°C to 280°C during the subsequent color coating operation, it is equivalent to giving the substrate an artificial aging effect, which will cause the yield strength of the substrate to increase. If the control is not good during the processing, tensile strain lines will appear on the surface, which will affect the appearance of the product. Therefore, the color-coated cold-rolled substrate used a...

Images