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Ultralow-carbon glassed steel for ultra-deep bathtub and production method of ultralow-carbon glassed steel

A technology of ultra-low carbon and enamel steel, which is applied in the manufacture of converters, etc., can solve the problems of insufficient anti-scaling performance, low yield strength, and difficulty in fully satisfying it, and achieve a product that is convenient for mass production, uniform in color, and low in manufacturing cost. Effect

Inactive Publication Date: 2020-07-14
SD STEEL RIZHAO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The content of Ti in this patented product is low, and no S element is added. The lack of two-phase particles such as TiS in the steel plate structure leads to insufficient anti-scale explosion performance, and its yield strength is 150-180MPa, and the r value is low. This product is suitable for some Dry enamelling of shallow or ordinary deep-drawn parts is difficult to fully meet the stringent requirements of ultra-deep deep-drawing for ultra-deep bathtubs and wet double-sided enamel

Method used

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  • Ultralow-carbon glassed steel for ultra-deep bathtub and production method of ultralow-carbon glassed steel
  • Ultralow-carbon glassed steel for ultra-deep bathtub and production method of ultralow-carbon glassed steel
  • Ultralow-carbon glassed steel for ultra-deep bathtub and production method of ultralow-carbon glassed steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The smelting composition control of Example 1 is shown in Table 2.

[0042] The production method of embodiment 1 is as follows:

[0043] Steelmaking process: KR is removed from S to 0.020%, RH refining is carried out under the vacuum of 3000-4000Pa, and the nitrogen blowing time is 12min. Ultra-low carbon alkaline covering agent is used for continuous casting. The flow rate of argon blowing between plates is 3L / min, and the liquid level fluctuation is ± 2.5mm, 0.9m / min constant casting speed.

[0044] Hot rolling process: the slab is released from the furnace at a temperature of 1240 °C, and the furnace time is 185 minutes. U-shaped coiling is used.

[0045] Pickling process: the operating speed of the pickling process section is 150 mpm, the concentration of pickling corrosion inhibitor is 1.0‰, the total reduction rate of cold rolling is 80.0%, the surface reflectivity of the steel plate after rolling is 70.8%, and the residual oil amount on one side is 225mg / m 2 ,...

Embodiment 2

[0048] The smelting composition control of Example 2 is shown in Table 2.

[0049] The production method of embodiment 2 is as follows:

[0050] Steelmaking process: KR is removed from S to 0.030%, RH refining is performed at a vacuum of 3000-4000Pa for 12 minutes of circulating nitrogen blowing time, ultra-low carbon alkaline covering agent is used for continuous casting, the flow rate of argon blowing between plates is 6L / min, and the liquid level fluctuates ± 2.0mm, 1.0m / min constant casting speed.

[0051] Hot rolling process: the slab is released from the furnace at a temperature of 1235 °C, and the furnace time is 225 minutes. U-shaped coiling is used.

[0052] Pickling process: the operating speed of the pickling process section is 165mpm, the concentration of pickling corrosion inhibitor is 1.0‰, the total reduction rate of cold rolling is 75.0%, the surface reflectivity of the steel plate after rolling is 71.8%, and the residual oil amount on one side is 232mg / m 2 ,...

Embodiment 3

[0055] The smelting composition control of Example 3 is shown in Table 2.

[0056] The production method of embodiment 3 is as follows:

[0057] Steelmaking process: KR is removed from S to 0.028%, RH refining is performed at a vacuum of 4000-5000Pa for 10 minutes of circulating nitrogen blowing time, ultra-low carbon alkaline covering agent is used for continuous casting, the flow rate of argon blowing between plates is 5L / min, and the liquid level fluctuates ± 2.0mm, 1.0m / min constant casting speed.

[0058] Hot rolling process: the slab is released at a temperature of 1230°C and the furnace time is 215min. U-shaped coiling is used. The coiling temperature is 728-740°C within 30 meters of the head and tail, and 679-687°C in the middle.

[0059] Pickling process: the operating speed of pickling process section is 170mpm, the concentration of pickling corrosion inhibitor is 1.5‰, the total reduction rate of cold rolling is 75.0%, the surface reflectivity of the steel plate af...

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Abstract

The invention relates to ultralow-carbon glassed steel for an ultra-deep bathtub and a production method of the ultralow-carbon glassed steel. The ultralow-carbon glassed steel comprises, by weight percent, 0.0015%<=C<=0.0040%, 0.10%<=MN<=0.30%, not larger than 0.020% of Si, not larger than 0.015% of P, 0.020%<=S<=0.040%, 0.02%<=Als<=0.050%, 0.10%<=Ti<=0.13%, 0.0040%<=N<=0.0120% and the balance Feand other residual micro elements. The production method of the ultralow-carbon glassed steel for the ultra-deep bathtub comprises the steel making procedure, the hot rolling procedure, the acid pickling procedure and the continuous annealing procedure. A cleaning control unit, a temperature control unit and a leveling control unit are included in the continuous annealing procedure. Good flexibility resistance, scale blasting resistance, enamel adherence and other comprehensive prosperities are achieved, and the rigid requirements of a glassed steel plate for the ultra-deep bathtub are met. In the whole process, the manufacturing cost is low, and the production process is simple and easy to control.

Description

technical field [0001] The invention relates to the field of metal material processing, in particular to an ultra-low carbon enamel steel for an ultra-deep bathtub and a production method thereof. Background technique [0002] With the rapid improvement of living standards, ultra-deep bathtub products integrating bathing and health functions have been widely used in private residences, high-end hotels and other places. At present, the mainstream ultra-deep bathtubs are made of cast iron, enamel special steel plates and acrylic materials. Among them, steel plate bathtubs have the characteristics of moderate weight, easy molding and low cost. Because the surface is enamel coated, it is easy to clean, not easy to fade, and has a long-lasting luster. Therefore, it has always maintained a strong cost-effective advantage in the competition with various bathtub products. [0003] Steel plate bathtubs are generally stamped and formed with steel plates with a thickness of less than ...

Claims

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Application Information

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IPC IPC(8): C22C38/04C22C38/06C22C38/14C21D8/02C21D1/74C21D1/26C21C7/10C21C5/28
CPCC21C5/28C21C7/10C21D1/26C21D1/74C21D8/0226C22C38/001C22C38/002C22C38/004C22C38/04C22C38/06C22C38/14
Inventor 王乐陈晓潇李洪翠张磊胡华东王兴梁亚张冲冲朱信成丁中许铭孙冰王海阳孙明双李柏君张英杰
Owner SD STEEL RIZHAO CO LTD
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