Method for manufacturing abrasion-resistant foundation bolt

An anchor bolt, wear-resistant technology, applied in the direction of screws, mechanical equipment, threaded fasteners, etc., can solve the problems of accident source, fracture or crack, easy to rust and corrosion, etc., to improve tensile strength and plasticity. Good, high precision bolt effect

Active Publication Date: 2013-06-05
浙江同力重型机械制造有限公司
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  • Abstract
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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

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

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

[0023] a. Casting rod material, by weight, first put 12-14 parts of scrap iron into the intermediate frequency electric furnace to melt into molten iron, then add carburant, and then put it in when the temperature in the intermediate frequency electric furnace rises to 1000-1220 °C 0.1-0.2 parts of molybdenum, 30-35 parts of steel ingot, 30-35 parts of steel scrap and 12-16 parts of returned furnace material, and at the same time sprinkle a layer of heat preservation covering agent on the surface of the melt to cover, and then discharge slag, after slag discharge Add 0.5-0.8 parts of nickel-iron alloy, 1-2 parts of silicon-iron alloy, and when the temperature in the intermediate frequency electric furnace rises to 1450 ° C, add 0.4-0.6 parts of magnesium powder into the ladle together ...

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Abstract

The invention discloses a method for manufacturing an abrasion-resistant foundation bolt. Machining steps include: casting a rod, by weight, adding 12-14 parts of scrap iron into a medium frequency furnace to melt to form molten iron, adding carburant, when the temperature in the medium frequency furnace rises to 1000-1220 DEG C, adding 0.1-0.2 part of molybdenum, 30-35 parts of steel ingot, 30-35 parts of scrap steel 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 0.5-0.8 part of ferro-nickel alloy and 1-2 parts of ferrosilicon alloy, when the temperature in the medium frequency furnace rises to 1450 DEG C, withdrawing, adding 0.4-0.6 part of magnesium powder 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 bolt processing method, in particular to a preparation method of wear-resistant anchor bolts. 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-strengt...

Claims

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Application Information

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IPC IPC(8): F16B35/00B23P15/00C22C38/16C22C33/04C23F17/00
Inventor 赵光明
Owner 浙江同力重型机械制造有限公司
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