Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparation method of high-hardness cladding coating of rotating part

A technology of rotary parts and high hardness, which is applied in the direction of coating, metal material coating process, fusion spraying, etc., which can solve problems such as cracking and low coating, and achieve the effect of preventing cracking

Pending Publication Date: 2021-11-30
WUXI FULAIDA PETROLEUM MACHINERY
View PDF2 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] It is a common surface engineering technology to prepare a high-hardness coating with anti-corrosion and wear-resistance on the surface of the rotating parts by induction remelting. Causes cracking of less ductile coatings, often requiring insulation of rotating parts after cladding
However, due to the long length of the rotating parts, when the coating of the rotating parts is clad and then kept warm, the first cladding coating has been cooled to a lower temperature in the air, and cracking occurs. Therefore, it is urgent to develop a method for melting A method for synchronous heat preservation of revolving workpieces

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of high-hardness cladding coating of rotating part

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Use an oxyacetylene flame spray gun to spray a layer of Ni-Fe-Cr-B-Si coating with a thickness of 1mm on the surface of 45 steel with a diameter of 150mm and a length of 1200mm after cleaning and sandblasting;

[0034] (2) Turn on the induction heating device, and set the output power of the induction heating power supply to 30KW, the current to 82A, the rotation speed of the workpiece to 45 rpm, and the moving speed of the induction coil to 25mm / min, so that the rotary part located in the induction heating ring Heated by induction, the Ni-Fe-Cr-B-Si coating on its surface melts and solidifies to form a metallurgically bonded dense coating with the substrate;

[0035] (3) Wrap the asbestos rope on the coating at the 5cm away from the left side of the induction heating ring at the beginning end of the rotator, and use the rotary motion of the rotator to wrap the asbestos rope.

[0036] (4) After the coating cladding on the surface of the rotary part is completed, tur...

Embodiment 2

[0040] (1) Use an oxyacetylene flame spray gun to spray a layer of Ni-Fe-Cr-B-Si+35 with a thickness of 1.2mm on the outer surface of a 16Mn steel rod with a diameter of 200mm and a length of 1800mm after cleaning and sandblasting. %WC coating;

[0041] (2) Turn on the induction heating device, and set the output power of the induction heating power supply to 50KW, the current to 100A, the rotation speed of the workpiece to 35 rpm, and the moving speed of the induction coil to 20mm / min, so that the rotary part located in the induction heating ring Heated by induction, the Ni-Fe-Cr-B-Si+35%WC coating on the surface melts, and forms a metallurgically bonded dense coating with the substrate after solidification;

[0042] (3) Wrap the asbestos rope on the coating at the 5cm away from the left side of the induction heating ring at the beginning end of the rotator, and use the rotary motion of the rotator to wrap the asbestos rope.

[0043] (4) After the coating cladding on the sur...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
diameteraaaaaaaaaa
thicknessaaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

The invention provides a preparation method of a high-hardness cladding coating of a rotating part. The preparation method comprises the following steps that 1) the rotating part is fixed to a rotating workbench, and an alloy or alloy ceramic composite powder layer is prearranged on the surface of the rotating part; 2) an induction heating device is started, so that the rotating part located in an induction heating ring is subjected to induction heating, the alloy or alloy ceramic composite powder layer on the surface of the rotating part is melted, and a coating combined with a base body is formed after solidification; 3) an asbestos cord is automatically wound around the solidified part of the start cladding end of the rotating part; 4) after cladding of the coating on the surface of the rotating part is completed, the induction heating device is stopped; 5) the rotating part continues to rotate till an asbestos cord heat preservation layer on the surface of the cladding layer is completely wound; and 6) the rotating part with the surface wound with the complete asbestos cord layer is put into a heat preservation furnace for heat preservation, and the furnace is slowly cooled to the room temperature. According to the preparation method of the high-hardness cladding coating of the rotating part, the synchronous heat preservation effect on the coating is achieved, and the phenomenon that the coating subjected to induction cladding cracks during cooling is prevented.

Description

technical field [0001] The invention relates to the technical field of surface engineering, in particular to a method for preparing a high-hardness cladding coating of a rotary part. Background technique [0002] It is a common surface engineering technology to prepare a high-hardness coating with anti-corrosion and wear-resistance on the surface of rotating parts by induction remelting. However, when cladding a high-hardness coating, due to the difference in expansion coefficient between the coating and the substrate, it is easy This leads to cracking of the less ductile coating, so it is often necessary to insulate the rotating parts after cladding. However, due to the long length of the rotating parts, when the coating of the rotating parts is clad and then kept warm, the first cladding coating has been cooled to a relatively low temperature in the air, and cracks occur. Therefore, it is urgent to develop a method for melting A method of revolving workpieces for synchron...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10C23C4/06C23C4/129C23C4/18
CPCC23C24/103C23C4/129C23C4/06C23C4/18
Inventor 章诗岐
Owner WUXI FULAIDA PETROLEUM MACHINERY