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Manufacture method of cold-rolled electrolytic tin substrate

A production method, electro-tinning technology, applied in the direction of metal rolling, metal rolling, workpiece surface treatment equipment, etc., can solve the problems of over-thickness, stamping cracking, surface quality inclusions, etc., and achieve good ductility, large investment, and good appearance beautiful effect

Active Publication Date: 2014-07-09
山东泰山轧钢有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Since the food industry uses high-precision ultra-thin cold-rolled tin-plated substrates to have strict requirements on surface quality (roughness), shape quality, physical properties (hardness, stamping performance), and thickness accuracy, the high-precision ultra-thin cold-rolled tin-plated In the substrate production process, it is difficult to control the surface quality (roughness), plate shape quality, thickness accuracy, hardness and stamping performance. The surface quality is easy to cause inclusions, peeling, black spots, rolling lines, pitting, scratches, Defects such as oil stains and chromatic aberrations are likely to cause defects such as edge waves, middle waves, and rib waves in terms of plate shape. In terms of product thickness accuracy, it is easy to cause defects such as uneven thickness, ultra-thin, and ultra-thickness. In terms of physical properties, it is easy to cause hardness exceeding the standard value and Instability, stamping cracking defects, causing customers to be unable to use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The production steps of a 0.2mm high-precision ultra-thin cold-rolled electroplated tin substrate are:

[0027] (1) Smelting: hot metal desulfurization → converter smelting → vacuum treatment → continuous casting.

[0028] (2) Hot rolling: The chemical composition is C: ≤0.06%, Si: ≤0.03%, Mn: ≤0.60%, S≤0.05%, P≤0.02%, Cu≤0.20%, Ni≤0.20%, Cr≤ The continuous casting slab with 0.10%, Mo≤0.05%, the rest being iron and unavoidable impurities is hot rolled.

[0029] (3) Pickling: The hot-rolled steel strip with thickness of 3.0mm and grade of MR is pickled by shallow groove turbulent push-pull hydrochloric acid pickling unit. Temperature of the first stage acid tank: 82℃, Fe 2+ Concentration: 116g / l, the final acid tank temperature: 66°C, concentration: 186g / l, pickling speed: 96m / min, rinse water temperature: 74°C, rinse water conductivity: 46us / cm.

[0030] (4) The first cold rolling with a high-precision six-high HC reversible rolling mill, using an emulsion with an emulsion con...

Embodiment 2

[0043] The production steps of a high precision ultra-thin cold-rolled tin plated substrate with a thickness of 0.18mm are as follows:

[0044] (1) Smelting: hot metal desulfurization → converter smelting → vacuum treatment → continuous casting.

[0045] (2) Hot rolling: The chemical composition is C: ≤0.06%, Si: ≤0.03%, Mn: ≤0.60%, S≤0.05%, P≤0.02%, Cu≤0.20%, Ni≤0.20%, Cr≤ The continuous casting slab with 0.10%, Mo≤0.05%, the rest being iron and unavoidable impurities is hot rolled.

[0046] (3) Pickling: Pickling the hot-rolled steel strip with thickness of 2.75mm and grade of MR through a shallow groove turbulent push-pull hydrochloric acid pickling unit. Temperature of the first stage acid tank: 86℃, Fe 2+ Concentration: 98g / l, the final acid tank temperature: 68℃, concentration: 214g / l, pickling speed: 83m / min, rinse water temperature: 85℃, rinse water conductivity: 32us / cm.

[0047] (4) The high-precision six-high HC reversible rolling mill is used for the first cold rolling, u...

Embodiment 3

[0060] The production steps of a 0.16mm high-precision ultra-thin cold-rolled electroplated tin substrate are:

[0061] (1) Smelting: hot metal desulfurization → converter smelting → vacuum treatment → continuous casting.

[0062] (2) Hot rolling: The chemical composition is C: ≤0.06%, Si: ≤0.03%, Mn: ≤0.60%, S≤0.05%, P≤0.02%, Cu≤0.20%, Ni≤0.20%, Cr≤ The continuous casting slab with 0.10%, Mo≤0.05%, the rest being iron and unavoidable impurities is hot rolled.

[0063] (3) Pickling: The hot-rolled steel strip with thickness of 2.0mm and grade of MR is pickled by shallow groove turbulent push-pull hydrochloric acid pickling unit. Temperature of the first stage acid tank: 89℃, Fe 2+ Concentration: 93g / l, the last stage acid tank temperature: 69℃, concentration: 236g / l, pickling speed: 82m / min, rinsing water temperature: 87℃, rinsing water conductivity: 21us / cm.

[0064] (4) Using high-precision six-high HC reversing mill for the first cold rolling, using an emulsion with an emulsion co...

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Abstract

The invention discloses a manufacture method of a cold-rolled electrolytic tin substrate. The manufacture method comprises the steps of: (1) processing the produced molten iron by converter smelting, vacuum treatment, continuous casting and hot rolling after desulfuration to obtain a cold-rolled material; (2) pickling by a shallow-trench turbulent push-pull hydrochloric acid pickling set; (3) carrying out cold rolling for the first time by using a six-roller HC reversing mill, and rolling to a semi-product with a thickness of 0.5 to 0.6 mm after passing through 4 to 7 rolling passes; (4) cleaning by an electrolytic degreasing set; (5) carrying out annealing for the first time in a full-hydrogen shine-cover annealing furnace; (6) carrying out cold rolling for the second time by using the six-roller HC reversing mill; (7) carrying out annealing for the second time in the full-hydrogen shine-cover annealing furnace; (8) leveling by using a four-roller leveling machine, wherein the rolling force is controlled between 3000 to 4500kN; and (9) trimming by a re-reeling set, oiling, packaging and storing in a warehouse. The manufacture method disclosed by the invention has the advantages of stable production and low production cost, and can meet the requirement for high-quality electrolytic thin substrate in the food package industry.

Description

Technical field [0001] The invention belongs to the field of metal material iron and steel metallurgy, in particular to a method for producing high-precision ultra-thin cold-rolled tin plated substrates for the food industry. Background technique [0002] Tin plate is a product made by plating a layer of tin on the surface of extremely thin steel plate. It belongs to the coated steel plate in metallurgical products. The tin plate produced by the electroplating process is called electroplated tin plate. Strength and formability, tin's corrosion resistance and solderability are integrated. It has the characteristics of corrosion resistance, non-toxicity, high strength, good ductility and beautiful appearance. It is widely used in food, beverage, chemical, coating and other products. Packaging and stamping products and other fields. [0003] With the growing prosperity of the food packaging industry, the demand for high-precision and ultra-thin electroplated tin substrates has also i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B1/40B21B45/02C21D1/26C21D9/46
Inventor 陈培敦刘金元郎宝山朱爱美侯元新
Owner 山东泰山轧钢有限公司