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Steel hot-rolling plate for double-sided enamels, and preparation process thereof

A preparation process and plate technology, applied in the field of double-sided enamel hot-rolled steel plate and its preparation, can solve the problems of increased precipitation temperature, unfavorable steel plate formability and surface quality, and reduced production efficiency, so as to achieve improved compressive strength, Effect of preventing scaling defects and improving steel plate quality

Inactive Publication Date: 2015-07-22
HENAN INST OF ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In the existing research, there are mainly the following defects: (1) The addition of titanium is always maintained at a relatively high level. Since titanium is a precious metal, the more the addition of titanium, the higher the cost, and the high addition of titanium, nitrogen The precipitation temperature of titanium oxide increases, and the precipitated particles become coarser. Therefore, the enamelled steel with more titanium added is not only costly but also not conducive to improving the formability and surface quality of the steel plate.
(2) There are many studies on single-sided enamelled steel, focusing on the improvement of stamping performance, but often ignoring the improvement of compressive strength. It is difficult to directly apply the added elements of the anti-scale explosion performance of single-sided enameled steel to the improvement of double-sided enameled steel Zhonglai
(3) The hot rolling process is either relatively rough or too complicated, which reduces production efficiency

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-6

[0024] The billet proportioning was performed according to the composition table shown in Table 1, and hot rolling and cooling treatment were performed to obtain a sheet material.

[0025] The specific steps of hot rolling are as follows: the first-stage hot-rolling temperature is 1300±50°C, and the reduction is 25-35%; the second-stage hot-rolling temperature is 1200±50°C, and the reduction is 15-25%; The hot rolling temperature of the third stage is 1100±30℃, the reduction is 10-20%, the hot rolling temperature of the fourth stage is 1000±10℃, the reduction is 5-15%; the hot rolling temperature of the fifth stage is 900 ±10°C, the reduction is 1-8%, and the cumulative reduction is controlled within the range of 50-90%. Rapid cooling after rolling, the cooling rate is 25-40°C / s, the coiling temperature is 600-650°C, and the final plate thickness is 15-25mm.

[0026] It is particularly pointed out that Example 1, Example 2, and Example 4 are the best implementation modes, and...

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Abstract

The invention relates to a steel hot-rolling plate with characteristics of high strength, strong enamel coating adhesion and good fish-scaling resistance and used for double-sided enamels, and a preparation process thereof, wherein the steel hot-rolling plate comprises, by weight, 0.02-0.05% of C, 0.012-0.015% of N, 0.01-0.05% of S, less than or equal to 0.05% of P, less than or equal to 0.04% of Si, less than or equal to 0.025% of W, 0.02-0.5% of Mn, 0.01-0.05% of Al, 0.02-0.025% of Ti, and the balance of Fe and unavoidable impurities. The preparation process adopts the method combining the sectional continuous rolling and the rapid cooling after rolling.

Description

technical field [0001] The present application relates to a hot-rolled steel plate for enamelling and a preparation method thereof, in particular to a hot-rolled steel plate for double-sided enamelling with high strength, strong enamel coating adhesion, and good anti-scaling performance and a preparation method thereof. Background technique [0002] Double-sided enamelled steel is a special type of enamelled steel, which requires that the steel plate can achieve double-sided enamel with dense glaze. Steel has high requirements for deep drawing performance, and double-sided enamelled steel pays more attention to the requirements for steel strength and enamel performance. [0003] The phenomenon of scale explosion is an important reason for the high reject rate of enamelled steel, and the anti-scale explosion performance is an important index to measure the enamel performance of enameled steel. There are many factors that lead to scale explosion of enamel products, but the qu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/60C22C38/14C21D8/02
Inventor 李宏亮
Owner HENAN INST OF ENG
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