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A cold-rolled steel plate for enamel and its manufacturing method

A technology of cold-rolled steel plate and enamel, which is applied in the field of metal materials and its manufacturing, can solve the problems such as difficulty in ensuring the carbon content of finished products, and achieve the effects of improving the surface quality of enamel, improving efficiency, and preventing pinhole defects

Active Publication Date: 2022-06-28
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult to ensure that the carbon content of the finished product is stably controlled below 20ppm

Method used

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  • A cold-rolled steel plate for enamel and its manufacturing method
  • A cold-rolled steel plate for enamel and its manufacturing method
  • A cold-rolled steel plate for enamel and its manufacturing method

Examples

Experimental program
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Effect test

Embodiment 1-7

[0099] The cold-rolled steel sheet for enamel of the present invention adopts the following steps to obtain:

[0100] (1) Preparation of slab: molten iron is cast into slab after converter smelting and refining, wherein the carbon content in molten steel after refining is ≤0.04%;

[0101] (2) Hot rolling: control the heating temperature during hot rolling to be 1100 to 1250 °C, the final rolling temperature to be 800 to 950 °C, and then cool to a coiling temperature of 600 to 750 °C;

[0102] (3) Pickling;

[0103] (4) Cold rolling: control the total reduction ratio of cold rolling ≥ 65%;

[0104] (5) Degreasing;

[0105] (6) Decarburization annealing: the annealing temperature is 750~900℃, the annealing time is 30s~30min, the atmosphere in the annealing furnace includes hydrogen and nitrogen, the hydrogen content is 20~80%, and the dew point is 50~80℃;

[0106] (7) Flattening: control the flattening reduction rate ≤5%.

[0107] Table 1 lists the mass percentage ratio of e...

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Abstract

The invention discloses a cold-rolled steel plate for enamel, the mass percentage of chemical elements is: 0<C≤0.002%; Mn: 0.10-0.50%; 0<P≤0.085%; S: 0.015-0.055%; Al≤0.01 %; 0<N≤0.010%; 0<O≤0.050%; B≤0.015%; Nb≤0.10%; V≤0.10%; Ti≤0.10%; Sb≤0.10%; Co≤0.10%; the balance is Fe and other unavoidable impurities. In addition, the present invention also discloses a method for manufacturing the above-mentioned cold-rolled steel plate for enamelling, the steps of which include: (1) preparing a slab (2) hot rolling (3) pickling (4) cold rolling (5) degreasing (6) Decarburization annealing: the annealing temperature is 750-900°C, the annealing time is 30s-30min, the atmosphere in the annealing furnace includes hydrogen and nitrogen, the hydrogen content is 20-80%, and the dew point is 50-80°C (7) smooth. The cold-rolled steel plate for enamel described in the present invention has extremely low carbon content, is especially suitable for the requirements of one-time enamelling process, can significantly reduce the thickness of the porcelain layer, has excellent resistance to pinhole defects and enamel surface quality, and also has excellent Anti-scale explosion performance.

Description

technical field [0001] The invention relates to a metal material and a manufacturing method thereof, in particular to a steel plate and a manufacturing method thereof. Background technique [0002] With the development and wide application of the one-shot enamel coating process and electrostatic powder in the enamel industry, the production process of enamel products has become more automated and continuous, which is not only energy efficient, but also environmentally friendly. The optimization of the production process of enamel products has also greatly improved the quality of enamel products. The porcelain layer of enamel products has become thinner and more uniform in thickness, with higher corrosion resistance and wear resistance, and surface and appearance quality. higher. Compared with the wet enamel coating process, the thickness of the ceramic layer can be reduced to below 150 μm or even below 100 μm by using the electrostatic dry powder coating process. As the th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/04C22C38/60C22C38/06C22C38/12C22C38/14C22C38/10C22C38/44C22C38/42C22C38/46C22C38/48C22C38/50C22C38/52C22C38/54C21D8/02
CPCC22C38/04C22C38/60C22C38/004C22C38/002C22C38/001C22C38/06C22C38/12C22C38/14C22C38/10C22C38/44C22C38/42C22C38/46C22C38/48C22C38/50C22C38/52C22C38/54C21D8/0205C21D8/0273C21D8/0257C21D8/0236C21D8/0226
Inventor 孙全社金冰忠魏娇王双成张宝平王俊凯
Owner BAOSHAN IRON & STEEL CO LTD
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