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Soft tin-plate of hardness HR30T 51+/-3 and making process thereof

A manufacturing method and technology of tinplate, applied in the direction of manufacturing tools, metal rolling, metal rolling, etc., can solve the problems of large variation range of thickness specifications and difficulty in stable control of hardness.

Active Publication Date: 2009-04-01
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the wide range of thickness specifications, it is difficult to stably control the hardness within 51±3

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1—6

[0046] Example 1-6: Using titanium-IF steel to produce thicker (>0.25mm) T-1.5 soft tinplate. The molten steel is vacuum degassed by RH refining, and a variety of measures to control inclusions are adopted. Finally, the continuous casting slab is produced by the conventional continuous casting process. The chemical composition of the molten steel is shown in Table 2, and the steel also contains other unavoidable impurities. elements, the balance being Fe.

[0047] Table 2 Actual chemical composition of substrates in Examples 1-6, wt%

[0048]

make up

No

finished product

thickness

(mm)

C

Si

mn

P

S

Al

N

O

Ti

1 0.26 0.0050 0.007 0.26 0.010 0.0065 0.045 0.0026 0.0027 0.060 2 0.28 0.0040 0.015 0.28 0.012 0.0055 0.053 0.0030 0.0040 0.045 3 0.32 0.0032 0.012 0.30 0.006 0.0150 0.030 0.001...

example 7-12

[0059] Example 7-12: Using titanium-IF steel to produce thin gauge tinplate with a thickness less than or equal to 0.25mm. The molten steel was treated by RH refining vacuum degassing, and various measures to control inclusions were adopted. Finally, the continuous casting slab was produced by the conventional continuous casting process. The chemical composition of the molten steel is shown in Table 6, and the steel also contains other unavoidable impurities. elements, the balance being Fe.

[0060] Table 6 Actual performance of the substrate chemical composition of Example 7-12, wt%

[0061] make up

No finished product

thickness

C

Si

mn

P

S

Al

N

O

Ti

7 0.23 0.0015 0.025 0.23 0.009 0.0150 0.060 0.0023 0.0040 0.045 8 0.25 0.0020 0.006 0.28 0.012 0.0100 0.030 0.0020 0.0021 0.042 9 0.17 0.0012 0.015 0.30 0.007 0.0060 0.045 0.0030 0.0018 0.035 10 ...

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Abstract

The soft tin-plate of hardness HR30T 51+ / -3 consists of C not more than 0.005 wt%, Mn 0.20-0.30 wt%, Al 0.03-0.06 wt%, Si not more than 0.03 wt%, Ti 0.03-0.06 wt%, P not more than 0.012 wt%, S not more than 0.015 wt%, N not more than 0.003 wt%, O not more than 0.004 wt%, and Fe and inevitable impurities for the rest. Its production process includes the following steps: smelting steel, continuous casting and rolling, hot rolling, acid pickling and rolling, continuous annealing, flattening and tin plating.

Description

technical field [0001] The invention relates to a soft tinplate and a manufacturing method thereof, in particular to a soft tinplate with a hardness HR30T within 51±3 and a manufacturing method thereof. The soft tinplate is produced by continuous annealing of titanium-IF steel , mainly used for the production of flower basket barrels with enlarged diameters, can lids with complicated deformation and stamped and deformed cans. Background technique [0002] The production technology of tinplate is relatively mature and well known. With the expansion of the scope of use of tinplate, soft tinplate with excellent formability and hard tinplate with thin specifications have become the two main directions of its development. . [0003] According to the Japanese Industrial Standard JIS G3303, the hardness range of different grades of tinplate is shown in Table 1. Among them, T-1 to T-3 are soft tinplates, and T-4 to T-6 are hard tinplates. [0004] Table 1 Hardness range of differ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/14B21B1/46B21B37/00C21D9/46
CPCC22C38/14C22C38/004C22C38/02C22C38/06C22C38/04
Inventor 李俊林秀贞张理扬金仁忠
Owner BAOSHAN IRON & STEEL CO LTD
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