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Method for improving wear resistance and friction reduction performance of medium-low carbon steel workpiece through carburization and surface graphitization

A low-carbon steel and graphitization technology, applied in the field of steel material processing, can solve the problems of material loss, economic loss, energy consumption, etc., and achieve the effects of large contact stress, high speed, and improved wear resistance and wear resistance.

Active Publication Date: 2021-12-31
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Friction and wear are common phenomena in all kinds of mechanical equipment. The result is: on the one hand, a large amount of energy is consumed, and on the other hand, parts fail to cause a large amount of material loss.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] For the low carbon steel workpiece, the present embodiment proceeds according to the following steps:

[0026] For low-carbon steel workpieces whose chemical composition and mass percentage content are: 0.20%C, 1.6%Si, 0.47%Mn, 0.010%P, 0.012%S, 0.0006%B, and the remaining content is Fe and unavoidable impurities. The wear-resisting and friction-reducing method is to carry out the first carburizing, surface induction hardening, surface graphitization treatment, second carburizing and quenching, and low-temperature tempering heat treatment to it; wherein, the low-carbon steel workpiece The first carburizing is carried out drip-type controlled atmosphere carburizing in the carburizing furnace. The temperature used in the strong carburizing stage is 895°C, and the carbon potential in the furnace is controlled at 1.75%. When the carbon concentration on the surface of the workpiece reaches 1.25% Diffusion starts at 915°C, the carbon potential in the furnace is controlled at ...

Embodiment 2

[0029] For medium carbon steel workpiece, present embodiment carries out according to the following steps:

[0030](2) For the chemical composition and its mass percentage content: 0.46%C, 1.30%Si, 0.39%Mn, 0.011%P, 0.013%S, 0.0005%B, and the rest of the content is Fe and unavoidable impurities. Carbon steel workpieces; the wear-resisting and anti-friction method is to carry out the heat treatment of complete annealing, surface induction hardening, surface graphitization, carburizing and quenching, and low-temperature tempering in sequence; among them, complete annealing is to carry out temperature treatment on medium carbon steel workpieces. The temperature is 860°C, and the holding time is selected according to the maximum thickness of the workpiece, that is, isothermal at 3.5min / mm, and cooled to room temperature with the furnace; surface induction hardening is medium-frequency induction hardening for medium-carbon steel workpieces after complete annealing, according to the ...

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Abstract

The invention discloses a method for improving wear resistance and friction reduction performance of a medium-low carbon steel workpiece through carburization and surface graphitization, and belongs to the technical field of steel and iron material machining. According to the method, surface carburizing treatment and surface graphitizing treatment are mainly carried out on the workpiece made of medium and low carbon steel, and the surface carburizing treatment not only strengthens the surface layer of the workpiece, but also increases the carbon content of the surface layer of the workpiece and provides a carbon source for the subsequent surface graphitizing treatment. And the surface graphitization treatment is used for forming graphite particles in the carburized layer. After treatment, the surface layer of the medium-lowcarbon steel workpiece can form a reinforced wear-resistant carburizing structure for supporting a load framework and graphite particles for reducing the friction coefficient of a friction surface and realizing solid lubrication, so that carburizing reinforcement and graphite solid lubrication are compounded on the surface layer of the workpiece, and therefore, the treated medium-low carbon steel workpiece has high wear resistance and friction reduction performance and can be applied to improvement of the wear resistance and friction reduction performance of a friction pair working in the environment with large contact stresses and poor lubrication.

Description

technical field [0001] The invention relates to a method for improving the wear resistance and friction reduction of medium and low carbon steel workpieces by using carburizing and surface graphitization, and belongs to the technical field of steel material processing. Background technique [0002] Friction and wear are common phenomena in all kinds of mechanical equipment. The result is: on the one hand, it leads to the consumption of a large amount of energy, on the other hand, it leads to the failure of parts and causes a large amount of material loss. In severe cases, it may even cause huge economic losses. According to incomplete statistics, more than 1 / 3 of the world's energy consumption is in various friction losses, and 80% of machine parts fail due to wear and tear. Therefore, in order to save energy and materials, attention must be paid to improving the anti-friction and wear-resisting performance of the friction pair material surface. [0003] For workpieces made...

Claims

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Application Information

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IPC IPC(8): C23C8/22C23C8/80C21D1/10C21D1/18C22C38/02C22C38/04
CPCC23C8/22C23C8/80C21D1/10C21D1/18C22C38/02C22C38/04C22C38/002C21D2211/006Y02P10/25
Inventor 张永军
Owner UNIV OF SCI & TECH BEIJING
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