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Production method of steel for cold heading blind rivets

A technology of blind rivets and cold heading, which is used in the manufacture of converters, rolling mill control devices, metal rolling, etc., can solve problems such as being unfavorable to popularization and increase costs, and achieve the effects of promoting popularization, improving strength and reducing raw material costs.

Inactive Publication Date: 2011-11-16
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

[0003] According to the search, the article "Introduction to Drawing Type Blind Rivet Rod Technology" written by Liu Guoxiu and the article "Li Lingzhi. Steel Blind Rivet Performance Test" written by Ning Yongzhao disclosed the composition of steel used for making blind rivets. They both added A large amount of precious metals Cr, Ni, etc. increase the cost of production and are not conducive to popularization

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Steel for cold heading blind rivets, its chemical composition and weight percentage are: C 0.02%, Si 0.03%, Mn 0.5%, P 0.020%, S 0.015%, Al 0.01%, Ca 0.001%, the rest is Fe and unavoidable of impurities.

[0029] A method for producing steel for cold heading blind rivets according to claim 1, the steps of which are:

[0030] 1) Smelting: control the tapping temperature at 1660-1665°C;

[0031] 2) Carry out converter refining: and control its refining time at 30 minutes; when starting converter refining, add al-manganese ferroalloy at one time according to 60 kg / ton of steel;

[0032] 3) 5 minutes before the end of converter refining, start adding Al wire at 3 m / ton of steel until the end of refining;

[0033] 4) 2.5 minutes before the end of converter refining, start to add Si-Ca wire according to 3 m / ton of steel until the end of refining;

[0034] 5) Continuous casting: control the casting temperature at 1565-1570°C, and keep electromagnetic stirring; the dynamic r...

Embodiment 2

[0039] Steel for cold heading blind rivets, its chemical composition and weight percentage are: C 0.045%, Si 0.045%, Mn 0.85%, P0.0193%, S 0.012%, Al 0.025%, Ca 0.0021%, the rest is Fe and not Avoid impurities.

[0040] A method for producing steel for cold heading blind rivets according to claim 1, the steps of which are:

[0041] 1) Smelting: control the tapping temperature at 1670-1675°C;

[0042] 2) Carry out converter refining: and control its refining time at 40 minutes; When starting converter refining, add al-manganese ferroalloy at one time according to 75 kg / ton of steel;

[0043]3) 5.5 minutes before the end of converter refining, start to add Al wire according to 3.5 m / ton of steel until the end of refining;

[0044] 4) 3.5 minutes before the end of converter refining, start to add Si-Ca wire according to 4.5 m / ton of steel until the end of refining;

[0045] 5) Continuous casting: control the casting temperature at 1575-1580°C, and keep electromagnetic stirring...

Embodiment 3

[0050] Steel for cold heading blind rivets, its chemical composition and weight percentage are: C 0.062%, Si 0.065%, Mn 1.0%, P0.0190%, S 0.01%, Al 0.042%, Ca 0.0035%, the rest is Fe and not Avoid impurities.

[0051] A method for producing steel for cold heading blind rivets according to claim 1, the steps of which are:

[0052] 1) Smelting: control the tapping temperature at 1675-1680°C;

[0053] 2) Carry out converter refining: and control its refining time at 45 minutes; when starting converter refining, add al-manganese ferroalloy at one time according to 85 kg / ton of steel;

[0054] 3) 6.5 minutes before the end of converter refining, start adding Al wire at 4.0 m / ton of steel until the end of refining;

[0055] 4) 4.5 minutes before the end of converter refining, start to add Si-Ca wire according to 6.0 m / ton of steel until the end of refining;

[0056] 5) Continuous casting: control the casting temperature at 1580-1585°C, and keep electromagnetic stirring all the ti...

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Abstract

The invention specifically relates to steel for large flange blind rivets and a production method thereof. The steel comprises the following components by weight percent: 0.02-0.15% of C, 0.03-0.10% of Si, 0.5-1.5% of Mn, not more than 0.020% of P, not more than 0.015% of S, 0.01-0.07% of Al, 0.001-0.008% of Ca and the balance of Fe and impurities; and the production method comprises the following steps: smelting; refining in a converter: adding aluminum-manganese-iron alloy once at the beginning of refining, adding Al wires at 5-10 minutes before the end of the refining, and adding Si-Ca wires at 2.5-7 minutes before the end of the refining; continuous casting: heating a continuously cast billet; rolling: finish rolling and wire laying; and Stelmor cooling. The production method can reduce the breaking rate when drawing wires and the cold heading cracking rate, and the production process is simple and conductive to popularization; and the production method can improve the strength, save precious alloys and reduce the production cost through the process of C and Mn reinforcement, controlled rolling and controlled cooling.

Description

technical field [0001] The invention relates to a steel for rivets and a production method thereof, which belongs to the steel for cold-heading blind rivets and the production method thereof, and more particularly belongs to the steel for making large brim blind rivets and the production method thereof. Background technique [0002] Blind rivets, as novel fasteners, have attracted more and more attention from people. They are generally divided into ordinary type and large brim type in terms of shape. Due to its many unique advantages, it replaces bolted connection and welding in many fields, making various structural parts compact, light, beautiful in shape, easy to use, and labor-saving. Therefore, it is widely used in aircraft, ships, Automobiles, machinery, household appliances, electrical instruments, architectural decoration, luggage and containers and other industries. The materials used to make blind rivets are generally pure aluminum wire, aluminum-magnesium alloy w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/06C21C5/30B22D11/16B21B1/46B21B37/16
Inventor 任安超桂美文吉玉韩斌王俊朱敏周剑华鲁明正
Owner 武钢集团有限公司
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