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Cold drawing method for medium-carbon steel bar

A cold drawing and steel bar technology, applied in the field of steel processing, can solve the problems of material waste and high energy consumption, and achieve the effect of avoiding material waste, avoiding waste and saving energy

Active Publication Date: 2009-12-02
WUXI TIANCHEN COLD DRAWING STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the mechanical parts processed by the traditional method also have good comprehensive mechanical properties, there are the following problems: First, rough machining is required. If a Φ45 part is to be processed, a Φ48 base material must be used, and the material waste is serious; Quenching and tempering heat treatment needs quenching and medium-high temperature tempering. If you want to process Φ45 parts, the power consumption is more than 1000 degrees, and the energy consumption is relatively large.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] First select medium-carbon steel billets with a total deformation rate equal to 30% for use.

[0017] Then, carry out the first drawing. A chain-type drawing machine is used to draw medium-carbon steel billets with a total deformation rate greater than 30% and complete 60% of the total drawing amount.

[0018] This is followed by a first stress relief annealing treatment. Put the medium-carbon steel billet after the first drawing into a bell-type electric furnace with a temperature of 500°C for 5 hours, let it cool naturally with the furnace to 440°C, and then take it out for air cooling.

[0019] After that, the second drawing is carried out. A chain-type drawing machine is used to draw the medium-carbon steel billet after the first stress relief annealing treatment, and complete 40% of the total drawing amount.

[0020] Afterwards, a second stress relief annealing treatment is performed. Put the medium-carbon steel billet after the second drawing into a bell-type ...

Embodiment 2

[0024] First select medium-carbon steel billets with a total deformation rate greater than 30% for use.

[0025] Then, carry out the first drawing. A chain-type drawing machine is used to draw medium-carbon steel billets with a total deformation rate greater than 30% and complete 60% of the total drawing amount.

[0026] This is followed by a first stress relief annealing treatment. Put the medium-carbon steel billet after the first drawing into a bell-type electric furnace with a temperature of 510 ° C for 6 hours, let it cool naturally with the furnace to 450 ° C, and then take it out for air cooling.

[0027] After that, the second drawing is carried out. A chain-type drawing machine is used to draw the medium-carbon steel billet after the first stress relief annealing treatment, and complete 40% of the total drawing amount.

[0028] Afterwards, a second stress relief annealing treatment is performed. Put the medium-carbon steel billet after the second drawing into a be...

Embodiment 3

[0032] First select medium-carbon steel billets with a total deformation rate greater than 30% for use.

[0033] Then, carry out the first drawing. A chain-type drawing machine is used to draw medium-carbon steel billets with a total deformation rate greater than 30% and complete 60% of the total drawing amount.

[0034] This is followed by a first stress relief annealing treatment. Put the medium-carbon steel billet after the first drawing into a bell-type electric furnace with a temperature of 520°C for 7 hours, let it cool naturally with the furnace to 460°C, and then take it out for air cooling.

[0035] After that, the second drawing is carried out. A chain-type drawing machine is used to draw the medium-carbon steel billet after the first stress relief annealing treatment, and complete 40% of the total drawing amount.

[0036] Afterwards, a second stress relief annealing treatment is performed. Put the medium-carbon steel billet after the second drawing into a bell-t...

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Abstract

The invention relates to a cold drawing method for a medium-carbon steel bar, in particular to a cold drawing method for processing a medium-carbon steel bar blank into required specifications. The medium-carbon steel bar is manufactured by using the medium-carbon steel bar blank with the total deformation rate more than or equal to 30 percent through the steps of primary drawing, primary stress annealing treatment, secondary drawing, secondary stress annealing treatment, straightening treatment, nondestructive inspection and the like. The method can save material and reduce energy consumption.

Description

technical field [0001] The invention relates to a steel processing method. Specifically, it is a cold drawing method used to process medium carbon steel billets into required specifications. Background technique [0002] It is well known in the steel processing industry that mechanical parts such as cylinder piston rods and couplers for large-scale construction steel bars are required to have better comprehensive mechanical properties. In order to make these mechanical parts have better comprehensive mechanical properties, the traditional method is to use medium carbon steel rods as the base material, first rough machining, and then quenching and tempering heat treatment, that is, quenching and medium-high temperature tempering, so that it can reach the tempered cable type. made of body tissue. Although the mechanical parts processed by the traditional method also have good comprehensive mechanical properties, there are the following problems: First, rough machining is req...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D8/06C21D1/30
Inventor 许适
Owner WUXI TIANCHEN COLD DRAWING STEEL
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