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Steel plate for electric rice cooker shell, preparation method thereof, and chrome-plated plate

A technology of electric cooker and steel plate, applied in the field of steel rolling, can solve the problems of ridges, large fluctuation range of hardness, curved surface of slip line texture, etc., and achieves the effects of high performance stability, strong aging resistance and high formability.

Active Publication Date: 2021-04-16
SHOUGANG CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the steel plates for rice cooker shells are mainly MRT-4CA continuous annealing products. This product can meet the steel performance requirements of general rice cooker shells and can reduce cracking and strength problems in the production process. However, since MRT-4CA uses continuous annealing, it is inevitable There is a certain timeliness, so defects such as slip line lines and curved surface edges are prone to appear during the processing and forming process, and the hardness fluctuates in a large range, which does not meet the requirements of high-speed stamping production lines for material performance uniformity and stability. At the same time, the yield strength of MRT-4BA products is generally around 300MPa, which cannot meet the user's requirements for high compressive strength of the rice cooker shell

Method used

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  • Steel plate for electric rice cooker shell, preparation method thereof, and chrome-plated plate
  • Steel plate for electric rice cooker shell, preparation method thereof, and chrome-plated plate
  • Steel plate for electric rice cooker shell, preparation method thereof, and chrome-plated plate

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Effect test

preparation example Construction

[0036] In the preparation method of the steel plate and the chrome-plated plate used for the shell of the electric cooker of the present application, the effects of each process are as follows:

[0037] Steelmaking: The molten steel is subjected to RH refining vacuum degassing treatment, and corresponding measures to control inclusions are adopted, and finally the continuous casting slab is produced by the conventional continuous casting process, and then hot rolled.

[0038] Hot rolling: the method of the present invention adopts austenitic rolling + low-temperature coiling process in the hot rolling process, and the temperature of the slab out of the furnace is controlled between 1200-1280 °C, in order to avoid mixed crystals in the strip during low-temperature two-phase rolling Microstructure, using a higher finish rolling temperature, the finish rolling temperature is controlled at 880±20°C, in order to suppress the precipitation and coarsening of AlN, the coiling temperatu...

Embodiment 1

[0046] The Ti-IF steel was used, the molten steel was refined by RH, and the continuous casting slab was produced by the conventional continuous casting process. The chemical composition of the molten steel is shown in Table 1.

[0047] Table 1 Substrate Chemical Composition Performance of Example 1, Wt%

[0048] C(％) Si(%) Mn(%) P(％) S(％) Alt(%) 0(％) N(％) 0.04 0.01 0.24 0.006 0.007 0.047 0.0002 0.0021

[0049] The continuous casting slab is heated, rough rolled, finish rolled, layer cooled and coiled before hot rolling to produce cold rolled sheet through pickling + cold continuous rolling unit. The specific process parameters are shown in Table 2.

[0050] Table 2 Example 1 main rolling process parameters and actual performance

[0051] Tapping temperature (℃) Finishing temperature (℃) Coiling temperature (℃) Primary cold rolling reduction (%) 1280 879 570 86

[0052] The cold-rolled steel strip is recrystallized...

Embodiment 2

[0061] The Ti-IF steel was used, the molten steel was refined by RH, and the continuous casting slab was produced by the conventional continuous casting process. The chemical composition of the molten steel is shown in Table 5.

[0062] Table 5 Example 2 Substrate Chemical Composition Performance, Wt%

[0063] C(％) Si(%) Mn(%) P(％) S(％) Alt(%) 0(％) N(％) 0.04 0.01 0.24 0.01 0.007 0.046 0.0002 0.0023

[0064] The continuous casting slab is heated, rough rolled, finish rolled, layer cooled and coiled before hot rolling to produce cold rolled sheet through pickling + cold rolling unit. The specific process parameters are shown in Table 6.

[0065] Table 6 Example 2 main rolling process parameters and actual performance

[0066] Tapping temperature (℃) Finishing temperature (℃) Coiling temperature (℃) Primary cold rolling reduction (%) 1280 881 571 85

[0067] The cold-rolled steel strip is recrystallized and annealed i...

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Abstract

The invention provides a steel plate for an electric rice cooker shell, a preparation method thereof, and a chrome-plated plate. The steel plate for an electric rice cooker shell provided by the invention, in terms of weight percentage, has a chemical composition of: C: 0.03‑0.05%, Mn: 0.18‑ 0.28%, Als: 0.030‑0.060%, Si≤0.02%, 0≤0.0030%, P≤0.015%, S≤0.015%, N≤0.0035%, and the rest are Fe and unavoidable impurity elements.

Description

technical field [0001] The invention belongs to the technical field of steel rolling, and in particular relates to a steel plate for an electric rice cooker shell, a preparation method thereof, and a chrome-plated plate. Background technique [0002] Rice cookers are high-voltage and high-temperature-resistant household appliances, so the steel plates used for the shells of rice cookers are required to have high strength and high formability. At present, the steel plates for rice cooker shells are mainly MRT-4CA continuous annealing products. This product can meet the steel performance requirements of general rice cooker shells and can reduce cracking and strength problems in the production process. However, since MRT-4CA uses continuous annealing, it is inevitable There is a certain timeliness, so defects such as slip line lines and curved surface edges are prone to appear during the processing and forming process, and the hardness fluctuates in a large range, which does no...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/06C22C38/04C22C38/02C21D8/02
CPCC21D8/0205C21D8/0226C21D8/0236C21D8/0268C21D2211/005C22C38/02C22C38/04C22C38/06
Inventor 吴志国方圆孙超凡莫志英孙晴刘伟王雅晴宋浩石云光李海旭林悦
Owner SHOUGANG CORPORATION
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