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A method for improving the strength and toughness of cutting edge of wire cutters

A cutting edge and wire cutter technology, applied in furnaces, heat treatment equipment, heat treatment furnaces, etc., can solve problems such as no public reports, achieve the effect of improving wear resistance and improving market competitiveness

Active Publication Date: 2021-09-21
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no literature that has publicly reported this method.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] This example is prepared according to the following steps: a steel wire clamp cutting edge with a higher toughness:

[0021] (1) Treatment, heat treatment, grinding, rolling, rolling, rolling, stripping, mechanical processing, heat treatment, grinding wheel thread by forging, machining, heat treatment, grinding wheel threads Strengthen, assembly, surface treatment, etc. to prepare wire clamps;

[0022] (2) Quenching and heat treatment of the forged and mechanical processed blank, high-temperature tempering heat treatment, wherein the quenching temperature is 842 ° C, which has a holding time of 4 min / mm; the high temperature tempering temperature is 510 ° C, and its holding time is 5min / mm;

[0023] (3) Three-way rolling treatment is performed on the billet after forging, machining, heat treatment, and the grinding wheel, the wheel width of the wheel is 1 mm larger than the shear cut edge; the first passage rolling pressure The average thickness of the shear cut edge is...

Embodiment 2

[0027] This example is prepared according to the following steps: a steel wire clamp cutting edge with a higher toughness:

[0028] (1) Treatment, heat treatment, grinding, rolling, stripping, mechanical processing, heat treatment, grinding wheel thread by forging, machining, heat treatment, grinding wheel thirteen Strengthen, assembly, surface treatment, etc. to prepare wire clamps;

[0029] (2) Quenching and heat treatment of the forged and mechanical processed blank, high temperature tempering heat treatment, wherein the quenching temperature is 850 ° C, its holding time is 4.2min / mm; the high temperature tempering temperature is 510 ° C, its holding time 5.6 min / mm;

[0030] (3) Three-way rolling treatment is performed on the billet after forging, machining, heat treatment, and the grinding wheel, the wheel width of the wheel is 1 mm larger than the shear cut edge; the first passage rolling pressure The average thickness of the shear cut edge is 2.9% (the average thickness...

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PUM

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Abstract

The invention discloses a method for improving the strength and toughness of cutting edges of wire cutters, which belongs to the technical field of steel material processing. It is characterized in that the invention mainly obtains the cutting edge of the wire pliers with high strength and toughness by performing quenching and tempering heat treatment on the wire pliers made of carbon steel, and performing rolling treatment on the cutting edge of the wire pliers . The quenching and tempering heat treatment ensures that the core of the cutting edge of the wire cutter has a certain strength and good toughness, and overcomes the problem of easy chipping caused by the insufficient toughness of the shearing edge prepared by the traditional process; the shearing edge is made by rolling The surface layer forms an obvious plastic strengthening layer and its grain refinement, and then realizes the strengthening of the cutting edge; therefore, compared with the cutting edge of the same material wire pliers prepared according to the traditional method, its strength and hardness can be increased by more than 60%. In turn, the wear resistance of the cutting edge is improved. In a word, the invention will help to improve the market competitiveness of the carbon steel wire cutters.

Description

Technical field [0001] The present invention relates to a method of improving the toughness of the wire clamp cutting edge, belonging to the technical field of steel material processing. Background technique [0002] The wire clamp is a commonly used hardware tools such as cutting various types of wires, wires, etc., and the application in work and life is quite wide. When the wire clamp is cut, the shear blade portion is subjected to shear force, high strength, low brittleness, and good wear resistance. That is, it is required to have a high toughness and abrasion resistance of the shear edge. [0003] In order to meet this requirement, the currently common method is mainly achieved by quenching, medium temperature or low temperature tempering heat treatment methods. However, this heat treatment method is difficult to obtain a higher strength, hardness, especially a steel wire of a carbon-containing carbon steel, which often occurs, and fail; or use Improve carbon-containing amo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D1/25C21D6/00C21D7/04C21D8/00C21D9/00C22C38/02C22C38/04
CPCC21D1/25C21D6/005C21D6/008C21D7/04C21D8/005C21D9/0068C22C38/002C22C38/02C22C38/04
Inventor 张永军
Owner UNIV OF SCI & TECH BEIJING