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Processes for production of steel sheets for cans

A manufacturing method and a technology for steel plates, which are applied in the field of manufacturing steel plates for cans, and can solve problems such as increased manufacturing costs and the like

Active Publication Date: 2013-06-19
JFE STEEL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

That is, since there is one more process than the ordinary process that ends with annealing, the manufacturing cost increases the part of this process.

Method used

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  • Processes for production of steel sheets for cans
  • Processes for production of steel sheets for cans

Examples

Experimental program
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Effect test

Embodiment 1

[0098] Steel containing the composition shown in Table 1 with the balance consisting of iron and unavoidable impurities was melted to obtain a billet. After the obtained slabs were reheated at each temperature described in Table 2, hot rolling was started. Hot rolling was performed by changing the finishing temperature in the range of 800 to 950°C and the coiling temperature in the range of 550 to 700°C (all are described in Table 2). Next, after pickling, cold rolling was carried out at each rolling ratio described in Table 2 to manufacture a thin steel sheet of 0.15 mm (here, the thickness of the hot-rolled sheet was adjusted according to the rolling ratio). For the obtained thin steel sheet, use a continuous annealing furnace to perform (recovery) annealing at an annealing temperature of 350 to 620° C. and an annealing time of 30 s, carry out surface pass rolling to make the elongation below 1.5%, and then continuously perform usual chrome plating (electroplating). ) to ob...

Embodiment 2

[0114] A steel having the composition shown in Table 4 and the balance consisting of unavoidable impurities and iron was melted in a real machine converter to obtain a billet. After reheating the obtained slab at 1150-1250° C., hot rolling starts. The hot rolling was performed while changing the finish rolling temperature in the range of 880°C to 900°C, and at the coiling temperature of 620°C. Next, after pickling, cold rolling is performed at a rolling reduction of 80 to 90%, to manufacture a thin steel sheet of 0.15 mm to 0.18 mm. For the obtained thin steel sheet, use a continuous annealing furnace to perform (recovery) annealing under the conditions of an annealing temperature of 300 to 700°C and an annealing time of 30s, carry out skin pass rolling so that the elongation rate becomes 1.5% or less, and then continuously perform usual chrome plating to obtain Non-tin-plated steel. In addition, detailed production conditions are shown in Table 5.

[0115] Furthermore, as ...

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Abstract

A high-strength tin mill black plate is manufactured so as to have a tensile strength of 550 to 650 MPa and a total elongation of 5% or more in such a manner that hot rolling is performed at a finishing temperature higher than or equal to an Ar 3 transformation point, cold rolling is performed, and recovery annealing is performed at a temperature 20°C to 200°C lower than a recrystallization starting temperature. Furthermore, a tin mill black plate is manufactured so as to have a tensile strength of 550 to 700 MPa and a total elongation of 4% or more and be capable of being manufactured by annealing at the same temperature as that of an ordinary tin mill black plate in such a manner that a steel sheet containing at least one of 0.001% to 0.05% Nb and 0.0001% to 0.005% B.

Description

technical field [0001] The present invention relates to a two-piece drawn and redrawn can and a three-piece welded can for use as can or container for canned beverages and canned food Welded can) can steel plate (tin millblack plate) manufacturing method. Background technique [0002] In recent years, since the demand for steel cans, which are steel plates for cans, has expanded, reductions in can manufacturing costs have been advancing. As a method of reducing the cost of can production, cost reduction of raw materials can be mentioned. In other words, extremely thin high-strength steel sheets for cans can be used even in two-piece cans subjected to drawing and three-piece cans whose main body is simply cylindrically formed. [0003] For example, when using a steel plate with a thickness of 0.16 mm, at least the body of weldcans must use a Rockwell hardness (HR30T) of about 73 to about 77 (at least 73 to 76, preferably 74 to 77), It is a high-strength material with a ten...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D9/46C21D8/02C22C38/12
CPCC21D9/46C21D8/02C22C38/06C22C38/04
Inventor 西原友佳小岛克己岩佐浩树
Owner JFE STEEL CORP
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