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Steel belt surface colouring method

A technology of surface coloring and steel strip, applied in metal material coating process, coating, solid diffusion coating, etc., can solve the problems of low environmental cost, extremely difficult control of quality color uniformity, etc. The layer structure is dense without peeling, and the effect of oxidation temperature and time optimization

Active Publication Date: 2007-03-14
ZHEJIANG BAINAI STEEL STRIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is simple in process and low in environmental cost, and is an environmentally friendly coloring technology, but it is extremely difficult to control the quality, especially the uniformity of color

Method used

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  • Steel belt surface colouring method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] The 0.5mm thick steel strip passes through the 10m long coloring treatment furnace at a speed of 5m / min. The actual residence time of the steel strip in the furnace is 2min, the furnace temperature is 280°C, and the ammonia decomposition gas flow rate is 2m 3 / h, to obtain a uniform color, yellow steel strip.

Embodiment 2

[0014] The 0.5mm thick steel strip passes through a 10m long coloring treatment furnace at a speed of 2m / min. The actual residence time of the steel strip in the furnace is 5min, the furnace temperature is 350°C, and the ammonia decomposition gas flow rate is 1m 3 / h, to obtain a uniform color, blue steel strip.

Embodiment 3

[0016] A 2mm thick steel strip passes through a 10m-long coloring treatment furnace at a speed of 1m / min. The actual residence time of the steel strip in the furnace is 10min, the furnace temperature is 560°C, and the flow rate of methanol cracking gas is 0.2m 3 / h to obtain a uniform and black steel strip.

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Abstract

A process for coloring on the surface of steel band features that the steel band is treated in a heating furnace containing protecting gas at 280-560 deg.C for 2-10 min. Controlling the temp, the flow of protecting gas and time, the yellow, blue, or black color can be obtained.

Description

technical field [0001] The invention relates to a method for coloring the surface of a steel strip. Background technique [0002] With the gradual improvement of living standards, people require steel strips to have various colors. At present, the methods that can make the steel strip color include: electroplating, chemical conversion coating treatment, electrophoretic painting, high temperature oxidation treatment, etc. Among them, electroplating is to deposit Cu, Zn, Al, Ti, Ni or other alloy layers on the surface of steel first, and then use the characteristics of easy coloring of the deposited metal to perform chemical or electrochemical coloring on the deposited metal. The advantages of this type of method are wide coloring, bright and beautiful color quality, easy control, and the ability to make complex patterns, but there are many processes, complex equipment, easy pollution to the environment, and high cost; although electrophoretic painting can obtain a variety of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C8/10C23C8/18
Inventor 李益明
Owner ZHEJIANG BAINAI STEEL STRIP
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