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Continuously withdrawn hard tin-plated substrate and production method thereof

A technology for a tin-plated substrate and a production method, which is applied in the field of steelmaking, can solve the problems of short annealing time, difficulty in complete precipitation of nitrogen elements, and deformation, and achieve the effects of avoiding deformation and cracking and improving aging resistance.

Active Publication Date: 2016-03-02
SHOUGANG CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the annealing time of the continuous annealing (CA) production process is short, and the nitrogen element in the steel is difficult to completely precipitate, so there is an obvious aging phenomenon. The hardness HR30Tm of the produced tin-plated substrate will often increase by 1 to 3 units after being placed for a long time, causing downstream Problems such as deformation and cracking in the production process of can users

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] The mass percentages of chemical components formed by conventional continuous casting methods are C: 0.07%, Si: 0.005%, Mn: 0.36%, P: 0.010%, S: 0.008%, Als: 0.041%, B: 0.0010%, N: 0.0028 %, the rest are slabs of Fe and impurities, and the specifications are thickness × width = 230mm × 1000mm. Then, let the slab pass through the hot continuous rolling unit: that is, heating, rough rolling and dephosphorization, rough rolling, head and tail cutting, finish rolling and dephosphorization, finish rolling, laminar cooling, and coiling for hot continuous rolling. The heating temperature of the furnace is 1210°C, the rough rolling adopts 1+5 passes, the thickness of the intermediate billet is 38mm, the final rolling temperature of the finishing rolling unit is 866°C, the coiling temperature is 680°C, and the hot rolling specification is thickness×width=2.75mm× 970mm. In this way, after rough rolling, finish rolling, and laminar cooling, it is coiled by a coiler; , continuous...

Embodiment 2

[0013] The mass percentages of chemical components formed by conventional continuous casting methods are C: 0.09%, Si: 0.01%, Mn: 0.42%, P: 0.008%, S: 0.006%, Als: 0.053%, B: 0.0015%, N: 0.0020 %, the rest are slabs of Fe and impurities, and the specifications are thickness × width = 230mm × 1000mm. Then, let the slab pass through the hot continuous rolling unit: that is, heating, rough rolling and dephosphorization, rough rolling, head and tail cutting, finish rolling and dephosphorization, finish rolling, laminar cooling, and coiling for hot continuous rolling. The heating temperature of the furnace is 1250°C, the rough rolling adopts 1+5 passes, the thickness of the intermediate billet is 40mm, the final rolling temperature of the finishing rolling unit is 880°C, the coiling temperature is 618°C, and the hot rolling specification is thickness×width=3.0mm× 853mm. In this way, after rough rolling, finish rolling, and laminar cooling, it is coiled by a coiler; , Continuous c...

Embodiment 3

[0015] The mass percentages of chemical components formed by conventional continuous casting methods are C: 0.08%, Si: 0.02%, Mn: 0.44%, P: 0.009%, S: 0.008%, Als: 0.057%, B: 0.0017%, N: 0.0019 %, the rest are slabs of Fe and impurities, and the specifications are thickness × width = 230mm × 1000mm. Then, let the slab pass through the hot continuous rolling unit: that is, heating, rough rolling and dephosphorization, rough rolling, head and tail cutting, finish rolling and dephosphorization, finish rolling, laminar cooling, and coiling for hot continuous rolling. The heating temperature of the furnace is 1237°C, the rough rolling adopts 1+5 passes, the thickness of the intermediate billet is 39mm, the final rolling temperature of the finishing rolling unit is 871°C, the coiling temperature is 630°C, and the hot rolling specification is thickness×width=2.8mm× 932mm. In this way, after rough rolling, finish rolling, and laminar cooling, it is coiled by a coiler; , Continuous c...

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Abstract

The invention provides a continuous annealing hard tin-plated base plate. The continuous annealing hard tin-plated base plate comprises the following chemical components in percentage by mass: 0.07 to 0.09 percent of C, less than or equal to 0.02 percent of Si, 0.35 to 0.45 percent of Mn, less than or equal to 0.015 percent of P, less than or equal to 0.012 percent of S, 0.04 to 0.06 percent of Als, 0.0010 to 0.0020 percent of B, less than or equal to 0.0030 percent of N, and the balance of Fe and impurities. According to a production method for the continuous annealing hard tin-plated base plate provided by the invention, during a hot rolling process, the reheating temperature is 1,200 to 1,260 DEG C, the rough rolling of (1+5)-pass is adopted, the thickness of an intermediate blank is 38 to 40 mm, the final rolling temperature of finish rolling is 850 to 890 DEG C, the rolling temperature is 610 to 690 DEG C, and the thickness of a hot-rolled finished product is 2.5 to 3.0 mm. By the continuous annealing hard tin-plated base plate and the production method thereof provided by the invention, the tin-plated base plate which is low in aging, high in surface quality and suitable for making cans after the tin is plated by carbon manganese reinforcement and a cold and hot rolling process with appropriate component design of low nitrogen, high aluminum and high boron.

Description

technical field [0001] The invention relates to the technical field of steelmaking, in particular to a continuous annealing hard tin-plated substrate and a production method thereof. Background technique [0002] Tin plate is a cold-rolled low-carbon steel sheet or strip coated with tin on both sides obtained by continuous electro-tinning. It has the characteristics of corrosion resistance, non-toxicity, high strength and good formability, and is widely used in the packaging of food, beverage, chemical and other products. [0003] With the rapid development of the food packaging industry, the demand for high-quality tin-plated substrates in the tin plating industry is also growing rapidly. At present, the tin-plated substrate is usually low-carbon aluminum-killed steel, which is generally produced by continuous annealing (CA) and bell annealing (BA). Steel coils produced by bell annealing (BA) production process are usually soft in hardness and poor in surface quality. The...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/04C21D8/04
Inventor 方圆吴辉崔阳朱国森徐海卫阳代军潘宏伟张建强贾岳吕翔宇田志红王松涛张召恩孙大庆朱防修
Owner SHOUGANG CORPORATION