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Soft tin plate produced by using continuous annealing mode

A tin-plated, soft technology, used in the manufacture of converters, furnace types, furnaces, etc., can solve the problems of tin-plated steel belt buckling, low C content, high temperature, short production cycle, reduce production cost, The effect of short production times

Inactive Publication Date: 2010-10-20
武钢集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the C content of this process is low, and the alloying element Ti is added, and the temperature is high during continuous annealing, resulting in higher cost
Due to the high temperature during continuous annealing, it is also easy to cause the tinned steel strip to bend and break, so it is very difficult to implement in mass production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The weight percentage of the chemical composition is: C: 0.025%, Si: 0.025%, Mn: 0.25%, P: 0.015%, S: 0.012%, Als: 0.042%, N: 0.0021%, the rest is Fe and unavoidable impurities The raw material of low-carbon aluminum-killed steel is desulfurized by molten iron and smelted in a converter, the smelted molten steel is vacuum-treated, and then the treated molten steel is continuously cast into billets, and the continuously cast billets are hot-rolled into steel strips, and then The strip is pickled, and under the condition of a reduction rate of 80%, after 3 passes of cold rolling with an HC rolling mill, it is then subjected to electrolytic degreasing and continuous annealing in a continuous annealing furnace to obtain the cold-rolled tin plate 1 , the continuous annealing temperature is 650°C, and the holding time is 40s. The thickness of the cold-rolled tinplate 1 is 0.21mm, the hardness value (HR30Tm) is 57.5, the acid leaching lag value (PL) is 2.5s, and the cupping va...

Embodiment 2

[0036] The weight percentage of the chemical composition is: C: 0.018%, Si: 0.012%, Mn: 0.18%, P: 0.011%, S: 0.008%, Als: 0.056%, N: 0.0018%, the rest is Fe and unavoidable impurities The raw material of low-carbon aluminum-killed steel is desulfurized by molten iron and smelted in a converter, the smelted molten steel is vacuum-treated, and then the treated molten steel is continuously cast into billets, and the continuously cast billets are hot-rolled into steel strips, and then The strip is pickled, and under the condition of a reduction ratio of 90%, the HC rolling mill is used for 5 passes of cold rolling, and then undergoes electrolytic degreasing and continuous annealing in a continuous annealing furnace to obtain the cold-rolled tin plate 2 , the continuous annealing temperature is 710°C, and the holding time is 30s. The thickness of the cold-rolled tinplate 2 is 0.32mm, the hardness value (HR30Tm) is 57.5, the pickling time lag value (PL) is 2.5s, and the cupping valu...

Embodiment 3

[0038]The weight percentage of the chemical composition is: C: 0.015%, Si: 0.013%, Mn: 0.12%, P: 0.009%, S: 0.010%, Als: 0.073%, N: 0.0033%, the rest is Fe and unavoidable impurities The raw material of low-carbon aluminum-killed steel is desulfurized by molten iron and smelted in a converter, the smelted molten steel is vacuum-treated, and then the treated molten steel is continuously cast into billets, and the continuously cast billets are hot-rolled into steel strips, and then The strip is pickled, and under the condition of a reduction rate of 85%, after 4 passes of cold rolling with an HC rolling mill, it is then subjected to electrolytic degreasing and continuous annealing in a continuous annealing furnace to obtain the cold-rolled tin plate 3 , the continuous annealing temperature is 780°C, and the holding time is 25s. The thickness of the cold-rolled tinplate 3 is 0.25 mm, the hardness value (HR30Tm) is 54.5, the acid leaching lag value (PL) is 1.0 s, and the cupping v...

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Abstract

The invention provides a soft tin plate produced by using a continuous annealing mode. A raw material namely low-carbon aluminum killed steel of the tin plate comprises the following chemical components in percentage by weight: 0.01 to 0.03 percent of C, less than or equal to 0.025 percent of Si, 0.10 to 0.25 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 0.08 percent of Als, less than or equal to 0.004 percent of N, and the balance of Fe and inevitable impurities. The soft tin plate is produced by using the continuous annealing mode, and has the advantages of uniform performance, good plate shape and good surface quality. Simultaneously, the soft tin plate also has high stamping processability. Besides, the produced soft tin plate also has high corrosion resistance, has a very short production time and a shorter production cycle, saves production cost, has small production difficulties, and is easy to be implemented in large-scale production.

Description

technical field [0001] The invention relates to the field of metal smelting, in particular to a soft tinplate produced by continuous annealing and a production process. Background technique [0002] There are two annealing methods for cold rolling to produce tin-plated raw plates, namely bell furnace annealing (BA) and continuous annealing (CA). Generally speaking, bell furnace annealing is suitable for producing soft tinplate with lower hardness (such as TH52, TH55, TH57 tinplate); while continuous annealing furnace is generally suitable for producing hard tinplate with higher hardness. Tin plate (such as TH61, TH65 and other tin plate). Moreover, the performance of the tinplate produced by the continuous annealing method is uniform, and many quality indicators such as plate shape, surface quality, and corrosion resistance are significantly better than those produced by the bell annealing method. However, due to the short annealing time (generally 3-5min) of the tin-plate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/06C21C7/064C21C5/28C21C7/10B21B1/46C21D9/46
Inventor 涂元强黄先球柳长福张万灵白会平郭玉华钟定忠黎静
Owner 武钢集团有限公司
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