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Preparation method of high-strength T-shaped bolt

A high-strength bolt technology, applied in the direction of bolts, threaded fasteners, connecting components, etc., can solve the problems of easy rust, corrosion, fracture or crack, and the formation of accident sources, etc., and achieve high bolt precision, good plasticity, and improved resistance The effect of tensile strength

Inactive Publication Date: 2013-06-05
繁昌县琪鑫铸造有限公司
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

In addition, when the bolts are in a relatively humid environment, they are prone to rust and corrosion, eventually leading to breakage or cracks, forming a potential source of accidents

Method used

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Examples

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Embodiment Construction

[0022] The present invention will be further described in conjunction with the following examples:

[0023] The preparation method of high-strength T-shaped bolts, the processing steps include:

[0024] a. Casting T-shaped rod materials, by weight, first put 12-14 parts of scrap iron into the intermediate frequency electric furnace to melt into molten iron, and then put in 30-35 parts when the temperature in the intermediate frequency electric furnace rises to 1000-1220 °C Melt the steel ingot, 30-35 parts of pig iron and 12-16 parts of returned furnace material, and at the same time sprinkle a layer of thermal insulation covering agent on the surface of the melt to cover, then remove the slag, and add nickel-iron alloy, ferrosilicon and other alloys after the slag removal, When the temperature in the intermediate frequency electric furnace is 1400 ℃, pouring is carried out, and the weight percentage of each chemical composition of the control rod blank should meet the followi...

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PUM

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Abstract

The invention discloses a preparation method of a high-strength T-shaped bolt. The preparation method is mainly characterized in that machining steps comprise T-shaped rod material casting and the like. The T-shaped rod material casting comprises that 12-14 parts by weight of waste iron are first fed into a medium frequency furnace to be melted into molten iron, when temperature inside the medium frequency furnace rises to 1000-1200 DEG C, 30-35 parts by weight of steel ingot, 30-35 parts by weight of cast iron and 12-16 parts by weight of foundry returns are then fed into the molten iron, and at the same time, a layer of warm-keeping covering agent is sprinkled on the surface of the solution for covering, then slagging is conducted, and when temperature inside the medium frequency furnace rises to 1400 DEG C for discharging, pouring is conducted. According to the preparation method of the high-strength T-shaped bolt, cold extruding technology bolt machining is adopted, so that the strength of the bolt is improved, a hardness value and a strength value needed by the high-strength bolt are achieved, and the problems of delayed fracture and fatigue fracture of the bolt under high strength are solved, and in the use process, connection is reliable, the bolt is not prone to fracture, service life of the bolt is prolonged, and use demands to the high-strength bolt in all industries in the society are satisfied.

Description

technical field [0001] The invention relates to a bolt processing method, in particular to a preparation method of a high-strength T-shaped bolt. Background technique [0002] Anchor bolts are commonly used fasteners in the machinery industry. The current processing method is generally turning and forming, and the strength is often difficult to guarantee. Sometimes unsafe phenomena such as U-turns and rod fractures occur during use, which is very harmful to industrial production. Therefore, it plays an important role in the development of technology and economy to study and improve the production method of high-strength bolts to ensure the quality stability of high-strength bolts. In addition, when the bolts are in a relatively humid environment, they are prone to rust and corrosion, eventually leading to breakage or cracks, forming a potential source of accidents. [0003] In view of this, it is necessary to provide a method for preparing anchor bolts to produce high-stren...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/16B23P15/00B21K1/44C23F17/00
Inventor 赵光明
Owner 繁昌县琪鑫铸造有限公司
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