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Enamel steel and preparation method of cold rolled sheet thereof

A technology of enamelled steel and cold-rolled sheet, which is applied in the field of manufacturing enamelled steel and its cold-rolled sheet, which can solve the problems of difficult joining, high cost, and difficult to guarantee yield, and achieve low production cost and excellent scale explosion resistance , Excellent anti-pinhole performance

Inactive Publication Date: 2011-11-23
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Many of these precious metals are easy to oxidize, and it is difficult to add them to steel, the yield is difficult to guarantee, and the cost is high

Method used

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  • Enamel steel and preparation method of cold rolled sheet thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] According to the composition of 1 in Table 1, it is smelted by converter, refined, and then continuously casted. According to the process of 1 in Table 2, the continuous casting slab was heated to 1200°C for rolling, the final rolling temperature was controlled within the range of 850°C, and the coiling temperature was controlled at 750°C. The hot-rolled steel coil is pickled to remove scale and then cold-rolled, and the total reduction ratio of cold-rolling is 75%. The cold-rolled steel coil is continuously annealed, the annealing temperature is 750°C, and the annealing time is 6 minutes. The annealing process ensures that the ferrite structure in the steel completes recrystallization and grain growth.

[0064] Get 1.0mm thick cold-rolled steel plate to carry out mechanical property test, yield strength (R p0.2 ) is 195MPa, the tensile strength (R m ) is 312MPa, elongation (A 80 ) is 43.0%.

[0065] The steel plate is enamelled and sintered after pretreatment such ...

Embodiment 2

[0067] According to the composition of 2 in Table 1, adopt converter smelting, refining treatment, and then die casting. According to the process of 2 in Table 2, the steel ingot is heated to 1250°C for rolling after billeting, the final rolling temperature is controlled within the range of 950°C, and the coiling temperature is controlled at 750°C. The hot-rolled steel coil is pickled to remove scale and then cold-rolled, and the total reduction rate of cold-rolling is controlled at 75%. The cold-rolled steel coil is continuously annealed, the annealing temperature is 850°C, and the annealing time is 3 minutes. The annealing process ensures that the ferrite structure in the steel completes recrystallization and grain growth.

[0068] Get 1.0mm thick cold-rolled steel plate to carry out mechanical property test, yield strength (R p0.2 ) is 150MPa, the tensile strength (R m ) is 290MPa, elongation (A 80 ) is 43.0%.

[0069] The steel plate is enamelled and sintered after pre...

Embodiment 3

[0071] According to the composition of 3 in Table 1, adopt converter smelting, refining treatment, and then carry out continuous casting. According to the process of 3 in Table 2, the continuous casting slab was heated to 1200°C for rolling, the final rolling temperature was controlled within the range of 900°C, and the coiling temperature was controlled at 730°C. The hot-rolled steel coil is pickled to remove scale and then cold-rolled, and the total reduction rate of cold-rolling is controlled at 70%. The cold-rolled steel coil is continuously annealed, the annealing temperature is 850°C, and the annealing time is 3 minutes. The annealing process ensures that the ferrite structure in the steel completes recrystallization and grain growth.

[0072] Get 1.0mm thick cold-rolled steel plate to carry out mechanical property test, yield strength (R p0.2 ) is 149MPa, the tensile strength (R m ) is 305MPa, elongation (A 80 ) is 46.0%.

[0073] The steel plate is enamelled and si...

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Abstract

Enamel steel comprises the following chemical components by weight percent: less than or equal to 0.004% of C, less than or equal to 0.03% of Si, less than or equal to 1.0% of Mn, less than or equal to 0.035% of P, less than or equal to 0.050% of S, less than or equal to 0.030% of Al, 0.0003-0.010% of B, less than or equal to 0.015% of N, 0.005-0.05% of O and 0.005-0.20% of Ti. The enamel steel also comprises one or more of 0.01-0.20% of Cu, 0.01-0.20% of Cr, 0.01-0.20% of Ni and 0.01-0.20% of Mo. The preparation method of the enamel steel comprises the following steps: smelting, casting; performing hot rolling, wherein the finish rolling temperature is 700-950 DEG C; pickling the rolled steel coils to remove oxide scales; performing cold rolling, wherein the total reduction rate is more than 60%; and performing continuous annealing or box annealing at 650-900 DEG C for 1 minute-20 hours. The enamel steel has good pinhole resistance and fish scaling resistance, and the adhesion between the steel plate and the glaze is good.

Description

technical field [0001] The invention relates to enamelled steel, in particular to an enameled steel with excellent pinhole resistance and a method for manufacturing the cold-rolled plate thereof. The enamelled steel of the invention is suitable for use in the fields of light industry, household appliances, building decoration and the like. Background technique [0002] After the steel plate is processed and shaped, the bottom blank is made, and then the surface of the bottom blank is enamelled and sintered. The enamelled product has the characteristics of beautiful appearance, good corrosion resistance, long service life, and easy cleaning. Therefore, the application field of enamel products very broad. [0003] Defects such as scale explosion, poor adhesion and pinholes often occur in ordinary steel plates during the enamelling process, and these defects seriously damage the quality of enameled products. With the continuous expansion of the application range of enamel pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/14C22C38/50C21D8/02
Inventor 孙全社
Owner BAOSHAN IRON & STEEL CO LTD
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