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High service strength enameled steel plate and preparation method thereof

A manufacturing method and technology for steel plates, applied to the steel plate for enamel and its manufacturing field, can solve the problems of lack of steel plates for enamel, low yield strength, etc., and achieve the effects of high strength level, reduced wear, and good anti-scalding performance.

Active Publication Date: 2019-01-15
SHOUGANG CORPORATION +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the yield strength of the thick hot-rolled steel plate used for the lower layer of the domestic assembled tank is not high, generally lower than 300MPa, which is only suitable for the production of water storage capacity of 5000m 3 The tanks below the level lack the high-strength enamelled steel plates needed to make tanks with larger water storage capacity

Method used

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  • High service strength enameled steel plate and preparation method thereof
  • High service strength enameled steel plate and preparation method thereof
  • High service strength enameled steel plate and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0042] A steel plate for enameling with high strength after enamel firing, its chemical composition is shown in Table 1 by weight percentage, and its thickness is 11 mm.

[0043] The preparation method of above-mentioned steel plate for enamelling comprises the following steps:

[0044] Step 1, the molten iron is pretreated, converted into steel and refined to obtain the molten iron with the composition ratio of the steel plate for enameling, wherein the chemical composition of the steel plate for enameling is shown in Table 1 by weight percentage;

[0045] Step 2, continuous casting: continuous casting of the refined molten iron to obtain a billet;

[0046]Step 3, heating the slab: controlling the temperature of the slab to 1220°C by heating;

[0047] Step 4, two-stage hot rolling: 6 passes of rough rolling, followed by 7 passes of finish rolling, with a final rolling temperature of 860°C;

[0048] Step 5, coiling: the finished rolled plate is cooled by laminar flow and the...

Embodiment 2

[0057] A steel plate for enameling with high strength after enamel firing, its chemical composition is shown in Table 1 by weight percentage, and its thickness is 13 mm.

[0058] The preparation method of above-mentioned steel plate for enamelling comprises the following steps:

[0059] Step 1, the molten iron is pretreated, converted into steel and refined to obtain the molten iron with the composition ratio of the steel plate for enameling, wherein the chemical composition of the steel plate for enameling is shown in Table 1 by weight percentage;

[0060] Step 2, continuous casting: continuous casting of the refined molten iron to obtain a billet;

[0061] Step 3, heating the slab: controlling the temperature of the slab to 1230°C by heating;

[0062] Step 4, two-stage hot rolling: 6 passes of rough rolling, followed by 7 passes of finish rolling, with a final rolling temperature of 840°C;

[0063] Step 5, coiling: the finished rolled plate is cooled by laminar flow and th...

Embodiment 3

[0072] A steel plate for enameling with high strength after enamel firing, its chemical composition is shown in Table 1 by weight percentage, and its thickness is 14mm.

[0073] The preparation method of above-mentioned steel plate for enamelling comprises the following steps:

[0074] Step 1, the molten iron is pretreated, converted into steel and refined to obtain the molten iron with the composition ratio of the steel plate for enameling, wherein the chemical composition of the steel plate for enameling is shown in Table 1 by weight percentage;

[0075] Step 2, continuous casting: continuous casting of the refined molten iron to obtain a billet;

[0076] Step 3, heating the slab: controlling the temperature of the slab to 1210°C by heating;

[0077] Step 4, two-stage hot rolling: 6 passes of rough rolling, followed by 7 passes of finish rolling, with a final rolling temperature of 840°C;

[0078] Step 5, coiling: the finished rolled plate is cooled by laminar flow and the...

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Abstract

The invention discloses a high service strength enameled steel plate and a preparation method thereof. The steel plate is prepared from the following chemical components in percent by weight: 0.1-0.15% of C, 0.3-0.5% of Si, 1-1.8% of Mn, less than 0.013% of P, less than 0.005% of S, 0.020-0.050% of Alt, 0.04-0.07% of V, 0.011-0.015% of N and the balance ferrum and impurities. The preparation method comprises the following steps: 1) carrying out pre-treatment, converter steelmaking and refining on molten iron to obtain casting blank molten iron; 2) continuously casting the molten iron to prepare a casting blank; 3) heating the casting blank; 4) carrying out multi-pass rough rolling and finish rolling to obtain a finish rolled plate; and 5) carrying out laminar cooling to coil to obtain a finished product. The yield strength of the steel plate is 460-550 MPa, the yield strength of the enameled steel plate is 400-460 MPa, and the enameled steel plate can be used for manufacturing a lowertank wall of an enameled spliced tank, the moisture storage capacity of which is greater than 9000 m<3>.

Description

technical field [0001] The invention relates to a steel plate for enamelling and a manufacturing method thereof, in particular to a steel plate for enameling with high service strength and a manufacturing method thereof. Background technique [0002] Nowadays, some large-scale water treatment facilities, such as water storage tanks and sewage treatment tanks, all use enamel assembled tanks. The main components of enamel assembled tanks are enamel steel plates, which are made of enamel-coated and enamelled hot-rolled steel plates for enamel. Because the water pressure on the lower layer of the tank body is greater than that of the upper layer, the lower layer of the tank body is generally made of thick-gauge steel plates, while the upper layer is made of thin-gauge steel plates. The yield strength of the steel plate after enamelling is the service strength of the steel plate. The larger the water storage capacity of the tank body and the lower the position of the tank body, t...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C38/12C21D8/02
CPCC21D8/0226C21D2211/002C21D2211/004C21D2211/005C21D2211/009C22C38/02C22C38/04C22C38/06C22C38/12
Inventor 张志敏潘辉李晓林黄学启肖宝亮崔阳陈斌李飞程政张鹤松邱婉凌张镇高智慧安瑞东徐永先金钊
Owner SHOUGANG CORPORATION
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