Enamel steel and steel substrate and preparation method thereof
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A technology of enamel steel and steel substrate, applied in the field of enamel steel and its steel substrate and preparation, which can solve the problems such as easy occurrence of phosphorus explosion in the enamel layer
Active Publication Date: 2022-05-03
BEIJING SHOUGANG CO LTD +1
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[0003] The purpose of this application is to provide an enamelled steel and its steel base plate and its preparation method to s...
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[0051] According to another typical embodiment of the present invention, there is provided a method for preparing a steel substrate of enamelled steel as described above, the method comprising:
[0052] S1. Desulfurizing molten iron to obtain desulfurized molten steel;
[0053] S2. performing converter smelting on the desulfurized molten steel to obtain smelted molten steel;
[0054] S3. Refining and continuous casting the molten steel to obtain a billet;
[0055] In some embodiments, the key points of steelmaking process control: steelmaking process process route KR—BOF—RH—CC;
[0056] KR: ultra-low S removal, slag removal bright surface ≥ 95%, post-slag removal ≥ 2 times, control residual S at 0.0010-0.0020%;
[0057] The reason for controlling the slagging bright surface ≥ 95% is to ensure sufficient removal of S-containing slag and iron, and the adverse effect of this value being too small is to cause sulfur return in the subsequent converter process.
[0058] The reaso...
Embodiment 1
[0076] An enamelled steel, the thickness of which is 3.0mm;
[0078] Hot rolling process control of enamel steel: heating furnace temperature 1200°C, RT2: 1140°C, finish rolling entrance temperature: 1070°C, finish rolling exit temperature: 870°C, coiling temperature 620°C.
Embodiment 2
[0080] A kind of enamelled steel, the thickness of enamelled steel is 2.5mm;
[0082] Hot rolling process control of enamel steel: heating furnace temperature 1200°C, RT2: 1150°C, finish rolling entrance temperature: 1050°C, finish rolling exit temperature: 880°C, coiling temperature 630°C.
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Abstract
The invention particularly relates to enamel steel and a steel substrate and a preparation method thereof, and belongs to the technical field of steel preparation, and the steel substrate comprises the following chemical components: 0.02%-0.04% of C, less than or equal to 0.05% of Si, 0.2%-0.3% of Mn, less than or equal to 0.018% of P, less than or equal to 0.005% of S, 0.14%-0.18% of Ti, less than or equal to 0.004% of N and the balance of Fe. High-Ti, low-S and low-P components are adopted, second-phase particles TiC are formed, phosphorus explosion is mainly formed by overflowing hydrogen, phosphorus explosion control is mainly controlled by controlling hydrogen, hydrogen is controlled by forming a dispersed hydrogen trap through irreversible second-phase particles, TiC starts to be decomposed slightly at the temperature of 850 DEG C or above, and when the temperature exceeds 950 DEG C, TiC starts to be redissolved to the steel grade and is subjected to sufficient solid solution at the temperature of 1200 DEG C or above, and the temperature of the steel grade is controlled. TiN and TiS are stable at the temperature of 1300 DEG C or below, so that particles become larger along with time extension, large inclusions are formed, extension reduction and performance instability are caused by the large inclusions, and therefore, N and S need to be controlled, and the content of Ti needs to be increased.
Description
technical field [0001] The invention belongs to the technical field of steel preparation, and in particular relates to an enamelled steel, a steel substrate and a preparation method thereof. Background technique [0002] With the improvement of the economic base, Chinese users have gradually increased their attention to the kitchen, and the kitchen, which represents one of the important dimensions of the quality of family life, has also ushered in new development. With the changes in the consumption structure of residents, mainstream consumer groups are also showing a younger trend, and emerging kitchen appliances are ushering in explosive growth. Consumers have also changed from purely pursuing product practicability to pursuing high-end, fashionable and beautiful products. The dishwashing sink is currently made of stainless steel. In order to reduce costs and increase efficiency and increase aesthetics, the development uses double-sided enamelled pickling products to repl...
Claims
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Application Information
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