A kind of secondary cold-rolled tin plate for screw cap and production method thereof

A technology of secondary cold rolling and production method, which is applied in the direction of hot-dip plating process, coating, metal material coating process, etc., can solve the problems of difficult control of plate shape, high process cost, difficult acid rolling and other problems, and achieve Effect of improving surface quality, small anisotropy, and reducing alloy cost

Active Publication Date: 2019-02-22
SHOUGANG CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] This application provides a secondary cold-rolled tin plate for screw caps and its production method, which solves the problem of the secondary cold-rolled plate in the prior art. Due to the high carbon content, it is difficult to acid-roll and roll, and the shape of the plate is difficult to control. , needs finishing before plating, technical problems of high process cost

Method used

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  • A kind of secondary cold-rolled tin plate for screw cap and production method thereof

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Effect test

example 1

[0052] The mass percentages of chemical components formed by conventional continuous casting methods are C0.03%, Si0.01%, Mn0.18%, P0.010%, S0.005%, Als0.066%, N0.0080%, and the rest is Fe and impurity slabs.

[0053] Then, let the slab pass through the hot continuous rolling unit, that is, heating, rough rolling and descaling, rough rolling, head and tail cutting, finishing rolling and descaling, finishing rolling, laminar cooling, and coiling for hot continuous rolling. Among them, the heating temperature of the heating furnace is 1220°C, the rough rolling adopts 1+5 passes, the final rolling temperature of the finishing rolling unit is 877°C, and the coiling temperature is 667°C. In this way, after rough rolling, finish rolling, and laminar cooling, it is coiled by a coiler; , trimming, continuous cold rolling, continuous annealing, secondary cold rolling, and tin plating for cold rolling annealing and tin plating, wherein the continuous annealing temperature is 682°C, the...

example 2

[0055] The mass percentages of chemical components formed by conventional continuous casting methods are C0.05%, Si0.015%, Mn0.29%, P0.012%, S0.007%, Als0.045%, N0.0105%, and the rest is Fe and impurity slabs.

[0056] Then, let the slab pass through the hot continuous rolling unit, that is, heating, rough rolling and descaling, rough rolling, head and tail cutting, finish rolling and descaling, finish rolling, laminar cooling, and coiling for hot continuous rolling. The heating temperature is 1255°C, the rough rolling adopts 3+3 passes, the final rolling temperature of the finishing rolling unit is 858°C, and the coiling temperature is 715°C. In this way, after rough rolling, finish rolling, and laminar cooling, it is coiled by a coiler; , edge trimming, continuous cold rolling, continuous annealing, secondary cold rolling, and tin plating for cold rolling annealing and tin plating, wherein the continuous annealing temperature is 690°C, the secondary cold rolling rate is 18%...

example 3

[0058] The mass percentages of chemical components formed by conventional continuous casting methods are C0.04%, Si0.008%, Mn0.25%, P0.013%, S0.005%, Als0.033%, N0.0133%, and the rest is Fe and impurity slabs.

[0059] Then, let the slab pass through the hot continuous rolling unit, that is, heating, rough rolling and descaling, rough rolling, head and tail cutting, finish rolling and descaling, finish rolling, laminar cooling, and coiling for hot continuous rolling. The heating temperature is 1247°C, the rough rolling adopts 3+3 passes, the final rolling temperature of the finishing rolling unit is 887°C, and the coiling temperature is 693°C. In this way, after rough rolling, finish rolling, and laminar cooling, it is coiled by a coiler; , edge trimming, continuous cold rolling, continuous annealing, secondary cold rolling, and tin plating for cold rolling annealing and tin plating, wherein the continuous annealing temperature is 716°C, the secondary cold rolling rate is 15%...

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Abstract

The invention discloses a second cold rolling tinning sheet for a screw cap and a production method thereof. The second cold rolling tinning sheet for the screw cap comprises the following chemical components in percentage by mass: 00.03-0.05% of C, less than or equal to 0.02% of Si, 0.15-0.30% of Mn, less than or equal to 0.015% of P, less than or equal to 0.012% of S, 0.03-0.07% of Als, 0.0070-0.0140% of N and the balance being Fe and impurities. The production method comprises the steps of hot continuous rolling, cold rolling, continuous annealing, second cold rolling and tinning process. The second cold rolling tinning sheet for the screw cap and the production method thereof have the beneficial effects that the addition quantity of precious alloying elements in steel can be effectively reduced by adding an appropriate amount of C and Mn and 70-140ppm of N to the steel, thereby reducing the cost of alloy on the premise of ensuring strength and hardness; meanwhile, the high plasticity and the small aeolotropism can be obtained by high-temperature coiling, high-temperature continuous annealing and a low second cold rolling reduction ratio; and plating surface detects such as wood grains can be effectively avoided by exclusively adopting a pure induction reflowing technology, thereby improving the surface quality.

Description

technical field [0001] The invention relates to the technical field of steel products, in particular to a secondary cold-rolled tin plate for screw caps and a production method thereof. Background technique [0002] Secondary cold-rolled tinplate is a tinned steel sheet or steel strip coated with tin layers on both sides obtained by performing continuous electro-tinning on the annealed tin-plated original plate after secondary cold-rolling. It has the characteristics of high strength and thin thickness, and is widely used in food, beverage, chemical and other product packaging fields. Among them, the screw cap is one of the important uses of the secondary cold-rolled tinplate. Since the forming process does not trim the edge, strict requirements are put forward for the formability and anisotropy of the secondary cold-rolled tinplate. [0003] A high-elongation secondary cold-rolled sheet and its manufacturing method in the prior art, the composition of which is C0.15-0.20%,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/06C21D8/02C23C2/08C23C2/40
CPCC21D8/0226C21D8/0236C21D8/0268C22C38/001C22C38/02C22C38/04C22C38/06C23C2/08C23C2/40
Inventor 方圆吴志国宋浩孙超凡王雅晴石云光崔阳黄学启尹显东莫志英张召恩张晓峰周纪名朱防修刘伟宋军涛张旭明李海旭王振文申延智周保欣张宝来
Owner SHOUGANG CORPORATION
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