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Boron-containing cold-rolled enamel steel suitable for continuous annealing production and its manufacturing method

A manufacturing method and enamelled steel technology, applied in the field of boron-containing cold-rolled enameled steel and its manufacture, can solve the problems of less production practice of cold-rolled low-carbon enameled steel, etc., and achieve improved anti-scaling performance and strong enameled deformation resistance , The effect of small change in steel plate strength

Active Publication Date: 2017-09-26
NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the production practice of cold-rolled low-carbon enamelled steel using continuous annealing process is still relatively small.

Method used

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  • Boron-containing cold-rolled enamel steel suitable for continuous annealing production and its manufacturing method
  • Boron-containing cold-rolled enamel steel suitable for continuous annealing production and its manufacturing method
  • Boron-containing cold-rolled enamel steel suitable for continuous annealing production and its manufacturing method

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Embodiment Construction

[0036] The present invention will be further described below in conjunction with examples, the purpose is only to better understand the contents of the present invention, and the examples given do not limit the scope of claims of the present invention.

[0037] The chemical composition (mass percentage) of embodiment of the present invention and comparative example is shown in Table 1:

[0038] Table 1

[0039]

[0040] The main production process parameters of the embodiment of the present invention and comparative examples are shown in Table 2:

[0041] Table 2

[0042]

[0043] The production steps of each embodiment and comparative example are as follows:

[0044] 1. Pretreatment of molten iron, converter smelting, refining, casting into billets;

[0045] 2. The slab is heated, and the heating temperature is controlled at 1200-1250°C;

[0046] 3. Hot continuous rolling and coiling, the final rolling temperature is controlled at 860-930°C, and the coiling temperat...

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Abstract

The invention relates to a boron-containing cold-rolled enamel steel suitable for continuous annealing production and a manufacturing method thereof. The chemical composition mass percentage of the steel is: C 0.03-0.05%; Si≤0.02%; Mn 0.20-0.40%; P≤0.020% ; S 0.020‑0.035%; Als 0.020‑0.07%; B 0.0010‑0.0020%; N 0.0020‑0.0060%; the balance is Fe and inevitable impurities. It can be used for thin-gauge water heater liner and decorative panels for subways and tunnels, yield strength 200-240MPa, tensile strength 290-340MPa, elongation 38-44%, hardening exponent n value greater than 0.20, average plastic strain ratio rm value greater than 1.6 , The hydrogen lag time of 1mm thick steel plate is more than 50min, no scale explosion occurs after enamel, and the enamel adhesion performance reaches the national standard.

Description

technical field [0001] The invention relates to enamelled steel and its manufacturing process, in particular to a boron-containing cold-rolled enamelled steel suitable for continuous annealing production and its manufacturing method. The steel can be applied to inner tanks of thin water heaters and decorative panels of subways and tunnels. Background technique [0002] Enamel steel combines the inherent strength, toughness and ease of processing of steel materials with the advantages of corrosion resistance and easy decoration of ceramic materials, and is widely used in light industry, household appliances, chemical industry, construction and other industries. [0003] In the field of home appliances and construction, the requirements for the deep drawing performance of enamelled steel are not high, but the requirements for strength and resistance to enamel deformation are relatively high. Since the enamelled steel used for the water heater inner tank and the enameled plate ...

Claims

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Application Information

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IPC IPC(8): C22C38/06C21D8/02
Inventor 董福涛薛飞杜林秀刘相华
Owner NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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