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Preparation method of high-strength steel cable bolt

A cable bolt, high-strength technology, applied in the direction of bolts, threaded fasteners, connecting components, etc., can solve problems such as breakage or cracks, easy to rust and corrosion, and cause accident sources, etc., to achieve good plasticity, high bolt precision, The effect of increasing the tensile strength

Inactive Publication Date: 2013-06-05
青龙船务工程(南通)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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Embodiment Construction

[0019] The present invention will be further described in conjunction with the following examples:

[0020] The preparation method of high-strength steel cable bolts, the processing steps include:

[0021] a. Casting rod material, by weight, first put 10-14 parts of scrap steel into the intermediate frequency electric furnace to melt into molten steel, and then add carburant, when the temperature in the intermediate frequency electric furnace rises to 1120 ~ 1220 ° C, then put in 30 - 35 parts of steel ingot, 30-35 parts of pig iron and 12-16 parts of returned material, melted, then slag discharged, after slag discharged, add ferromanganese, ferrosilicon and other alloys, when the temperature in the intermediate frequency electric furnace rises to 1450 ℃ When it is out of the furnace, it is poured, and the weight percentage of each chemical composition of the control rod blank should meet the following requirements: C 0.28-0.35, Mn 0.25-0.35, V 0.05-0.15, Si 0.25-0.35, W 0.01-...

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Abstract

The invention discloses a preparation method of a high-strength steel cable bolt. The method includes the following steps: casting a rod material, throwing 10-14 parts by weight of waste steel into a medium frequency furnace, enabling the steel to be melted into liquid steel, adding a carbon addition agent, throwing 30-35 parts by weight of steel ingot, 30-35 parts by weight of cast iron and 12-16 parts by weight of returns into the medium frequency furnace after temperature in the medium frequency furnace is increased to 1120-1220 DEG C, conducting slagging and adding 0.4-0.6 part by weight of copper and liquid iron into a ladle to conduct pouring when temperature in the medium frequency furnace increases to 1450 DEG C and the iron is discharged. The preparation method of the high-strength steel cable bolt adopts the cold extrusion process to process the bolt, improves bolt strength, achieves the hardness and the strength required by 12.9 high-strength bolt, resolves the problems of delaying breaking and fatigue breaking of the bolt under high strength, prolongs service life of the bolt due to the fact that the bolt is reliable in connection and not easy to break in use, and meets using requirements of social industries for the high-strength bolt.

Description

technical field [0001] The invention relates to a method for processing bolts, in particular to a method for preparing high-strength steel cable bolts. Background technique [0002] Cable 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-turn and rod breakage 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 steel cable bolts to produce hi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00B21K1/46C23F17/00
Inventor 赵光明
Owner 青龙船务工程(南通)有限公司
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