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Preparation method of tungsten carbide particle enhanced steel-base surface layer composite bar

A technology of tungsten carbide particles and composite rods is applied in the field of preparation of tungsten carbide particles reinforced steel-based surface layer composite metal rods, which can solve the mechanical property damage of the overall composite material, difficult to control the volume fraction of ceramic particles, uneven dispersion of ceramic particles, etc. problems, to achieve the effect of a wide range of use, dense organization, and uniform distribution of the second phase

Inactive Publication Date: 2012-02-15
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this process must use a large amount of binder, resulting in a large number of porosity and slag inclusions
In order to solve the problems of uneven dispersion of ceramic particles and difficulty in controlling the volume fraction of ceramic particles, some scholars choose a certain thickness of porous ceramics to be composited with the metal matrix. The mechanical properties are greatly damaged

Method used

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  • Preparation method of tungsten carbide particle enhanced steel-base surface layer composite bar
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  • Preparation method of tungsten carbide particle enhanced steel-base surface layer composite bar

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Embodiment 1

[0020] Example 1: Preparation of tungsten carbide particle-reinforced steel-based surface layer composite metal rod

[0021] In this example, a micron-sized diameter tungsten wire is used to in-situ synthesize a hard reinforcing phase WC with high hardness and high elastic modulus in the metal matrix through the reaction between W element and C, thereby forming a high-strength and high-toughness alloy steel WC particle / metal matrix composite rod with a certain volume fraction of WC particles as the wear-resistant hard phase. In this way, not only the toughness and plasticity of metal materials are maintained, but also the characteristics of high hardness reinforced materials are good in wear resistance, so the application prospect is very broad. Moreover, the size, distribution, quantity and thickness of the composite layer of the reinforcing particles WC can be effectively controlled by choosing a reasonable preparation process.

[0022] The specific production operation pro...

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Abstract

The invention discloses a preparation method of a tungsten carbide particle enhanced steel-base surface layer composite bar. The method comprises the following steps of: coating recarbonizer on the cavity surface of a sand mould; acid-washing the tungsten filament to be used as a strengthening phase and making into a spiral shape; placing the spiral-shaped tungsten filament in the cavity, and pouring, wherein after the metal liquid is solidified to room temperature, a metal steel bar is obtained; removing rust of the surface of the metal bar; then coating a support film on the outer surface of the metal bar; after the support film is dried, performing surface rapid zone melting through a zone melting sensor, and performing rapid solidification, wherein the heating temperature for the surface rapid zone melting is controlled to be 20-30 DEG C higher than the melting point of the base material; after the zone melting, performing thermal treatment on the metal bar; and then performing cutting, mechanical straightening and the like to achieve the required size to finally obtain the tungsten carbide particle enhanced steel-base surface layer composite bar. The tungsten carbide particleenhanced steel-base surface layer composite bar not only maintains the characteristics of good toughness and plasticity of metal materials, but also has strong wear resistance. The thickness of a WC composite layer can reach 10-15 mm, and the hardness HRC can reach 50-56. The invention is easy to realize large-scale industrial production.

Description

technical field [0001] The invention relates to the preparation of composite rods, in particular to a preparation method of tungsten carbide particle-reinforced steel-based surface layer composite metal rods. Background technique [0002] Wear-resistant steel rods are suitable for many users of rod mills and coal mills in cement plants, power plants, mines, quartz sand plants, silica sand plants, sand aerated, coal chemical, aerated concrete plants, etc. The market demand is huge. The steel rods used in the market are made by rolling steel in steel mills. Due to their poor wear resistance, they generally have a short service life and consume a lot during use, resulting in a large waste of resources. The operating conditions of rod mills and coal mills require steel rods to have high wear resistance, as well as high strength and toughness. High wear resistance requires the hardness of the material to be high, and excessive hardness will lead to a decrease in the toughness of...

Claims

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Application Information

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IPC IPC(8): B22D19/14
Inventor 王发展
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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