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Method for manufacturing abrasion-resistant U-shaped bolt

A wear-resistant bolt technology, applied in the field of wear-resistant U-bolt preparation, can solve the problems of easy rust, corrosion, fracture or crack, and the formation of accident sources, etc., and achieve the effect of not easy to break, moderate hardness, and increased strength

Active Publication Date: 2013-06-05
浙江艾信汽车零部件股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • 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

[0021] The present invention will be further described in conjunction with the following examples:

[0022] The preparation method of wear-resistant U-shaped bolts, the processing steps include:

[0023] a. For casting U-shaped rod materials, by weight, first put 11-14 parts of scrap steel into the intermediate frequency electric furnace to melt into molten steel, then add carbon additive, and wait until the temperature in the intermediate frequency electric furnace rises to 1120 ~ 1220 ° C, then Put in 32-34 parts of steel ingots, 30-35 parts of pig iron and 12-16 parts of returned materials, and at the same time sprinkle a layer of thermal insulation covering agent on the surface of the melt to cover it, melt it, and then remove slag, and then add ferrosilicon, etc. Alloy, when the temperature in the intermediate frequency electric furnace reaches 1400°C, it will be poured, and the weight percentage of each chemical composition of the control rod blank should meet the follow...

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PUM

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Abstract

The invention discloses a method for manufacturing an abrasion-resistant U-shaped bolt. Machining steps include: casting a U-shaped rod, by weight, adding 11-14 parts of scrap steel into a medium frequency furnace to melt to form molten steel, adding carburant, when the temperature in the medium frequency furnace rises to 1120-1220 DEG C, adding 0.1-0.2 part of molybdenum, 0.2-0.3 part of magnesium ingot, 5-7 parts of scrap aluminum, 32-34 parts of steel ingot, 30-35 parts of pig iron and 12-16 parts of foundry returns, simultaneously scattering a layer of heat preservation covering agent on the surface of the melt and covering, slagging, after slagging, adding 0.6-0.9 part of ferromanganese and 2-3 parts of ferrosilicon alloy, when the temperature in the medium frequency furnace rises to 1400 DEG C, withdrawing, adding 0.4-0.6 part of copper along with molten iron into a ladle, and casting. The method adopts cold extrusion process to machine the bolt, the strength of the bolt is improved, hardness and strength required by the 12.9 high-strength bolt are met, and delayed fracture and fatigue fracture of the bolt under high strength are avoided. The bolt is reliable in connection and not prone to break, prolongs service life, and meets use requirements of various industries in society for the high-strength bolt.

Description

technical field [0001] The invention relates to a processing method for bolts, in particular to a preparation method for wear-resistant U-shaped bolts. Background technique [0002] U-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 U-shaped bolts to produce high-st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16B35/04C22C38/46
Inventor 赵光明
Owner 浙江艾信汽车零部件股份有限公司
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