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

A manufacturing method and color coating technology, which is applied in the field of metal material manufacturing, can solve the problems of edge defects, poor deep drawing performance, and excessive height of color-coated plates.

Active Publication Date: 2017-03-01
XINYU IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this invention, the component carbon is also set in a relatively high range, which is 0.10-0.30%. The excessive C atoms in the solid solution in the substrate will cause aging in the color coating baking and curing process, which will bring edge defects to the later color coating plate processing.
In addition, the sum of the elongation of skin finishing and tension straightening is 1.0-1.2%, which is too high, which reduces the plasticity of the substrate and deteriorates the deep drawing performance

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Embodiment 1: A color-coated cold-rolled substrate for a home appliance panel, the cold-rolled substrate:

[0061] 1) Smelting in a converter, refining in an RH furnace, and continuous casting into the slab described in component number 1;

[0062] 2) Hot rolling: heat the slab with the component number 1, the target hot rolling thickness is 2.5mm, the billet is rough rolled and finished rolled to obtain a hot rolled plate, the final rolling temperature is 910 ° C ~ 938 ° C, and then the The hot-rolled sheet is cooled by laminar flow, and coiled into a hot-rolled coil after cooling. The coiling temperature is 670-720°C;

[0063] 3) cold rolling: the target cold rolling thickness is 0.40 mm, and the hot rolled plate is rolled after pickling;

[0064] 4) Annealing treatment: the temperature of the soaking section of the continuous annealing furnace is 776-780°C;

[0065] 5) Leveling and tension bridge: leveling elongation 0.45% + tension leveling elongation 0.05%, level...

Embodiment 2

[0067] Embodiment 2: A color-coated cold-rolled substrate for a home appliance panel, the cold-rolled substrate:

[0068] 1) The slab described in component number 2 is formed through converter smelting, RH furnace refining, and continuous casting;

[0069] 2) Hot rolling: heat the slab of component number 2, the target hot rolling thickness is 2.7mm, the billet is rough rolled and finished rolled to obtain a hot rolled plate, the final rolling temperature is 915 ° C ~ 924 ° C, and then the The hot-rolled sheet is cooled by laminar flow, and coiled into a hot-rolled coil after cooling. The coiling temperature is 701-718°C;

[0070] 3) Cold rolling: the target cold rolling thickness is 0.50mm, and the hot-rolled plate is rolled after pickling;

[0071] 4) Annealing treatment: the temperature of the soaking section of the continuous annealing furnace is 772-775°C;

[0072] 5) Leveling and tension bridge: leveling elongation 0.50% + tension leveling elongation 0.10%, leveling w...

Embodiment 3

[0074] Embodiment 3: A color-coated cold-rolled substrate for a home appliance panel, the cold-rolled substrate:

[0075] 1) The slab described in component number 2 is formed through converter smelting, RH furnace refining, and continuous casting;

[0076] 2) Hot rolling: heat the slab of component number 2, the target hot rolling thickness is 3.2mm, rough rolling and finishing rolling of the slab to obtain a hot rolled plate, the final rolling temperature is 915°C to 930°C, and then the The hot-rolled sheet is cooled by laminar flow, and coiled into a hot-rolled coil after cooling. The coiling temperature is 676-712°C;

[0077] 3) cold rolling: the target cold rolling thickness is 0.60 mm, and the hot rolled plate is rolled after pickling;

[0078] 4) Annealing treatment: the temperature of the soaking section of the continuous annealing furnace is 765-770°C;

[0079] 5) Leveling and tension bridge: leveling elongation 0.58% + tension leveling elongation 0.15%, leveling wo...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/14C21D8/02
Inventor 吴洪赵和明裴伟邹锦忠郭明清王婷华马鹏谢桂强杨伟杰
Owner XINYU IRON & STEEL CO LTD
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