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Method for preventing wolfram carbine decomposition and sinking in argon arc weld deposit process on base steel body

A tungsten carbide and steel matrix technology, applied in arc welding equipment, welding equipment, manufacturing tools, etc., can solve the problems of easy decomposition and sinking of tungsten carbide particles, and achieve the advantages of reducing temperature, short residence time and reducing thermal effect. Effect

Inactive Publication Date: 2009-02-18
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that tungsten carbide particles are easy to decompose and sink to the bottom in the existing tungsten carbide surfacing technology, and to provide a method for preventing tungsten carbide from decomposing and sinking during argon arc surfacing welding on steel substrates

Method used

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  • Method for preventing wolfram carbine decomposition and sinking in argon arc weld deposit process on base steel body
  • Method for preventing wolfram carbine decomposition and sinking in argon arc weld deposit process on base steel body

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specific Embodiment approach 1

[0009] Specific implementation mode one: this implementation mode consists of the following steps:

[0010] Step 1, using the oxygen-acetylene flame spraying method to evenly spray the nickel-chromium-borosilicate self-fluxing alloy powder onto the surface of the workpiece to be surfacing;

[0011] Step 2, sending tungsten carbide particles into the part of the molten pool that is not heated by arc burning.

[0012] The method of this embodiment is mainly used in the field of argon arc surfacing. The invention patent with the publication number of CN101220475 discloses a method for manufacturing surface composite materials. In the manufacturing process, the method described in this embodiment can be used to spray a Layer alloy powder, and send carbide particles to the tail of the molten pool, which can effectively prevent the decomposition and bottom sinking of tungsten carbide particles.

specific Embodiment approach 2

[0013] Specific implementation mode two: see figure 1 , this embodiment is an example of applying the method described in Embodiment 1 to the overlay welding method for high wear-resistant and impact-resistant tungsten carbide composite plates:

[0014] Step 1, using Q235 steel as the substrate 2, degreasing and dewatering the surface to be surfacing;

[0015] Step 2: Perform sandblasting on the surface to be surfacing of the substrate 2, the sand used for sandblasting is 16-40 mesh brown corundum sand, and the sandblasting pressure is 0.4-0.8MPa;

[0016] Step 3: Fix the substrate 2 on the worktable 1, the worktable 1 is at an angle of 10°-20° to the horizontal plane, and spray the nickel-chromium borosilicate self-fluxing alloy powder on the substrate 2 evenly by using the oxygen-acetylene flame spraying method On the surface to be surfacing, a sprayed layer 3 is obtained, and the thickness of the sprayed layer 3 is 0.1-1.0 mm;

[0017] Step 4. The self-weight feeding devi...

specific Embodiment approach 3

[0023] Specific implementation mode three: see figure 2 , this embodiment is an embodiment of applying the method described in Embodiment 1 to the surfacing method for steel toothed cone bits:

[0024] Step 1, degreasing and dewatering the surface of the steel tooth gear 12 to be surfacing;

[0025] Step 2: Perform sandblasting on the surface of the steel tooth gear 12 to be surfacing, the sand used for sandblasting is 16-40 mesh brown corundum sand, and the sandblasting pressure is 0.4-0.8 MPa;

[0026] Step 3: Fix the steel-toothed gear 12 on the turntable 11, the rotation axis of the turntable 11 and the horizontal plane form an angle of 10° to 20°; use the oxygen-acetylene flame spraying method to evenly spray the nickel-chromium-borosilicate self-fluxing alloy powder To the surface of the steel teeth to be surfacing of the steel tooth gear 12, a sprayed layer 3 is obtained, and the thickness of the sprayed layer 3 is 0.1-1.0mm;

[0027] Step 4. The self-weight feeding ...

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Abstract

The invention discloses a method for preventing the decomposition and sinking of tungsten carbide on a steel substrate during the argon-arc resurfacing process, which relates to a method for obtaining a resurfacing layer used to strengthen the non-decomposition and non-sinking of tungsten carbide particles during the argon-arc resurfacing process, and aims to solve the problems of easy decomposition and easy sinking of the tungsten carbide particles in the prior technology of tungsten carbide resurfacing. An oxygen-acetylene flame spraying method is adopted to evenly spray nickel-chromium-boron-silicon self-fluxing alloy powder onto the surface of a workpiece to be resurfaced; and the tungsten carbide particles are sent into one part which is not burned and heated by electric arc in a molten pool. The method can effectively prevent the tungsten carbide particles from decomposing, avoid the heating of the electric arc to the tungsten carbide particles, reduce the heat effect of the molten pool on the tungsten carbide particles, and can prevent the tungsten carbide from decomposing; the tungsten carbide particles have short detention time in the molten pool, which can avoid the tungsten carbide particles from sinking; and the method can prepare a tungsten carbide resurfacing layer without precipitated carbide in the molten pool, the tungsten carbide particles have even distribution and no cracks in the resurfacing layer, and the resurfacing layer has better toughness and wearing resistance.

Description

technical field [0001] The invention belongs to the field of surface engineering, and in particular relates to a method for obtaining a surfacing layer in which reinforced tungsten carbide particles do not decompose and sink to the bottom during an argon arc surfacing process. Background technique [0002] Tungsten carbide has the advantages of high hardness, good wear resistance, and good wettability with iron, nickel, and cobalt-based alloys. It is widely used in high wear-resistant surfacing layers of parts in mining, metallurgy, and construction industries. Grind reinforcement particles. At present, tubular tungsten carbide surfacing electrodes are widely used for surfacing welding. During the surfacing welding process, the problem of decomposition of tungsten carbide particles caused by the thermal action of the arc and the molten pool is very serious. The decomposition of tungsten carbide particles will cause the reduction of its effective size, the loss of high hardn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/04
Inventor 刘爱国郭面焕
Owner HARBIN INST OF TECH
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