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Steel sheet for crown cap, manufacturing method therefor, and crown cap

A manufacturing method and technology of bottle caps, which are applied in the direction of manufacturing tools, bottle/container caps, and capping containers tightly with caps, which can solve the problems of reduced formability and poor sealing of bottles, and achieve the effect of thinning the wall

Active Publication Date: 2017-08-29
JFE STEEL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the secondary cold-rolling rate is increased, the formability will be lowered, and bottle sealing failure will occur.

Method used

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  • Steel sheet for crown cap, manufacturing method therefor, and crown cap
  • Steel sheet for crown cap, manufacturing method therefor, and crown cap

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Embodiment

[0067] The steel was smelted in a converter and continuously casted to obtain a billet having the composition shown in Table 1, and the remainder was composed of Fe and unavoidable impurities. After heating the obtained slab to 1250°C, hot rolling was performed at a rolling start temperature of 1150°C and a finish rolling temperature of 860°C, and coiling was performed at the coiling temperature shown in Table 2. Next, after removing scale by pickling, primary cold rolling was performed at the primary cold rolling ratio shown in Table 2, annealing was performed in a continuous annealing furnace at the annealing temperature shown in Table 2, and secondary cold rolling was performed at the annealing temperature shown in Table 2. The cold rolling ratio was subjected to secondary cold rolling (DR rolling) to obtain steel sheets (horizontals 1 to 9) having a thickness of 0.15 to 0.18 mm. For both sides of the obtained steel sheet, 100 mg / m was applied to each side 2 Cr-plated to o...

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Abstract

Provided are: a steel sheet for a crown cap that has adequate strength and moldability even when used after being made thin; a manufacturing method therefor; and a crown cap. The steel sheet has a composition containing, in mass%, C: 0.010% to 0.025%, Si: not more than 0.10%, Mn: 0.05% to 0.50%, P: not more than 0.050%, S: 0.005% to 0.050%, Al: 0.020% to 0.070%, and N: less than 0.0040%, the balance being obtained from Fe and unavoidable impurities. Regarding yield strength after heat treatment for fifteen minutes at 210 DEG C, yield strength in the rolling direction is at least 550 MPa and yield strength in the rolling plane in a direction that is 45 degrees from the rolling direction is not more than the mean of the yield strength in the rolling direction and the yield strength in the rolling plane in a direction that is 90 degrees from the rolling direction.

Description

technical field [0001] The present invention relates to a steel plate used as a material for a bottle cap of a bottle stopper of a glass bottle, a manufacturing method thereof, and a bottle cap. Background technique [0002] Conventionally, glass bottles have been frequently used as containers for beverages such as soft drinks and alcoholic beverages, and a metal stopper called a cap is widely used for narrow-mouthed glass bottles. Usually, the bottle cap is made of a thin steel plate as a raw material and is manufactured by molding, and includes a disc-shaped part that blocks the bottle mouth and a pleated part provided around it. By fastening the pleated part to the the mouth of the bottle to seal the bottle. [0003] The properties required for a thin steel sheet as a raw material for bottle caps include strength and formability. Bottles with caps are filled with beer, carbonated drinks, and other contents that generate internal pressure. Even when the internal pressur...

Claims

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Application Information

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IPC IPC(8): C22C38/00B65D41/12C21D9/46C22C38/60
CPCB65D41/12C22C38/00C21D8/0436C21D8/0473C21D9/0068C21D9/48C22C38/004C21D6/005C22C38/001C22C38/02C22C38/04C22C38/06C21D8/0226C21D8/0236C21D8/0263C21D9/46
Inventor 田中匠平口智也小岛克己中丸裕树假屋房亮
Owner JFE STEEL CORP
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