High-temperature-resistant high-performance alloyed fastener and manufacturing technique thereof

A production process and fastener technology, applied in the field of high-temperature-resistant high-performance alloy fasteners and their production process, can solve the problems of backward production process, fastener strength cannot reach 12.9 or above, and achieve excellent corrosion resistance , good plasticity, and the effect of improving the service life

Inactive Publication Date: 2013-09-11
汕头经济特区超艺螺丝工业有限公司
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a high-temperature-resistant high-performance alloy fastener and its production process to so

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0025] Using 42CrMoVNb as the raw material, the cold heading process described in step S1 adopts the bolt shaft shrinking cold forging forming technology, which relatively reduces the deformation of the bolt head forming and avoids the performance deterioration caused by the direct cold heading of the bolt head with a large deformation;

[0026] The heat treatment technique described in step S2 adopts N 2 -CH 3 OH nitrogen-based atmosphere, control N 2 The ratio with methanol cracked gas is 40 / 60 type. In the two stages of heat treatment, the temperature in the quenching stage is 940℃, and the temperature in the tempering stage is 610℃;

[0027] The rolling technology described in step S3 controls the arc radius of the thread groove bottom through the thread profile of the rolling wheel, develops a rolling process after heat treatment, introduces favorable residual compressive stress, offsets the stress concentration generated by the thread gap during stretching, and reduces Effecti...

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PUM

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Abstract

The invention provides a high-temperature-resistant high-performance alloyed fastener comprising following ingredients: 0.42% of C, 0.33% of Si, 0.70% of Mn, 0.030% or less of S, 0.030% or less of P, 1.10% of Cr, 0.025% or less of Ni, 0.025% or less of Cu, 0.20% of Mo, 0.24% of V, and 0.03% of Nb. The invention also provides a manufacturing technique used for production of the alloyed fastener. The manufacturing technique of the high-temperature-resistant high-performance alloyed fastener helps to solve a problem that: manufacturing techniques used for production of alloyed fasteners with a level of 12.9 or above have not been invented in domestic at present. The alloyed fastener produced by the manufacturing technique possesses high strength and hardness which are not possessed by common fasteners, and excellent plasticity, toughness, corrosion resistance, tensile strength, fatigue strength and delayed fracture resistance. The alloyed fastener is capable of ensuring that failures such as break and damage are not easy to happen in manufacturing process and using procedures, and can function normally at a highest temperature of 500 DEG C. Service life of the fastener is extremely prolonged.

Description

technical field [0001] The invention belongs to the field of metal machining, and relates to a high-temperature-resistant high-performance alloy fastener and a production process thereof. Background technique [0002] With the continuous advancement of my country's revitalization of the equipment manufacturing industry, the speed of industrial upgrading is accelerating, and the integration of my country's fastener industry with the economies of other countries is accelerating. high demands. [0003] my country joined the WTO in 2001 and entered the ranks of international trade powers. A large number of fastener products are exported to countries all over the world, and fastener products from all over the world are also pouring into the Chinese market. As one of the products with a large import and export volume in my country, fasteners are in line with international standards, which is of great significance and significance for promoting Chinese fastener companies to go glob...

Claims

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Application Information

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IPC IPC(8): C22C38/26C22C38/48C21D8/00F16B35/00
Inventor 黄祯楷李文雒旻陈捷坚蒋晓帆刘屏
Owner 汕头经济特区超艺螺丝工业有限公司
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