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

Laser cladding coating powder and preparation method

A laser cladding and powder technology, which is applied in the coating, metal material coating process, etc., can solve the problems of large temperature gradient of the molten pool, increase the cladding steps, and the effect is not significant, so as to refine the microstructure and improve the hardness And high temperature wear resistance, good effect on macroscopic morphology

Inactive Publication Date: 2020-10-16
UNIV OF JINAN
View PDF2 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the difference in physical and chemical properties between the two will cause a large temperature gradient in the molten pool, which will lead to defects such as holes and cracks in the cladding layer.
[0004] At present, many preparation methods improve defects by preheating before cladding. This method increases cladding steps, and the effect is not significant.

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
  • Laser cladding coating powder and preparation method
  • Laser cladding coating powder and preparation method
  • Laser cladding coating powder and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A laser cladding coating powder, its composition and mass fraction are: iron-based composite powder (90% Fe901+10% WC): 99wt.%, CeO 2 Powder: 1 wt.%.

[0028] The present invention also provides a preparation method of the laser cladding coating, comprising the following steps:

[0029] (1) Grinding and cleaning the metal substrate, and the specific steps of polishing and cleaning: the surface of the metal substrate is polished with 280-grit sandpaper and then polished with 400-grit sandpaper until the surface has no coarse scratches and the direction is consistent, and then anhydrous ethanol solution Ultrasonic cleaning, removal of debris and impurities, dried and ready for use, the metal matrix is ​​H13 hot work die steel, and its chemical composition is C0.4wt.%, Cr 5.2wt.%, Mn 0.4wt.%, Mo 1.0wt.%, Si 1.0wt.%, Fe rest;

[0030] (2) Weigh the laser cladding coating powder in proportion and mix it with a ball mill. The ball milling parameters: under vacuum conditions...

Embodiment 2

[0035] A laser cladding coating powder, its composition and mass fraction are: iron-based composite powder (90% Fe901+10% WC): 97wt.%, CeO 2 Powder: 3wt.%.

[0036] The present invention also provides a preparation method of the laser cladding coating, comprising the following steps:

[0037] (1) Grinding and cleaning the metal substrate, and the specific steps of polishing and cleaning: the surface of the metal substrate is polished with 280-grit sandpaper and then polished with 400-grit sandpaper until the surface has no coarse scratches and the direction is consistent, and then anhydrous ethanol solution Ultrasonic cleaning, removal of wear debris and impurities, standby after drying, the metal matrix is ​​H13 hot work die steel, and its chemical composition is the same as that of Example 1;

[0038] (2) Weigh the laser cladding coating powder in proportion and mix it with a ball mill. The ball milling parameters: under vacuum conditions, the ball milling speed is 200r / min...

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
Average hardnessaaaaaaaaaa
Average hardnessaaaaaaaaaa
Login to View More

Abstract

The invention discloses laser cladding coating powder and a preparation method. The laser cladding coating powder comprises the following compositions in percentage by mass: 97-99wt.% of iron-based composite powder (90% of Fe901 and 10% of WC) and 1-3 wt.% of CeO2 powder. The preparation method comprises the following steps: metallic matrix selection and pretreatment, powder matching and ball grinding, synchronous powder feeding, laser cladding, and generation of Fe-based composite coating taking Cr23C6 and WC as reinforcing phases on the surface of the metallic matrix. A laser cladding layeris excellently combined with the matrix and higher in hardness and has excellent oxidization resistance and high temperature wear resistance.

Description

technical field [0001] The invention relates to a laser cladding coating powder and a preparation method thereof, belonging to the technical field of surface modification of laser cladding metal materials. Background technique [0002] H13 hot work die steel is widely used in hot forging dies, hot extrusion dies and hot stamping dies due to its high thermal strength, high toughness and good hardenability. The forming of the workpiece in the hot stamping process is a heating-forming-cooling process. Due to the complex and harsh working conditions, the mold needs to bear alternating cold and hot loads and severe friction, so the wear failure at high temperature limits the service life of the mold material. [0003] Fe alloy powder is cheap, has a wide range of sources, and is firmly combined with the matrix. The metal-ceramic composite powder combines the toughness of the metal matrix and the high hardness of the ceramic particles, and the prepared coating has the advantages ...

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
IPC IPC(8): C23C24/10B22F1/00C22C38/02C22C38/22C22C38/32
CPCB22F1/0003C22C38/02C22C38/22C22C38/32C23C24/103
Inventor 韩滨林佳怡韩潇然王慧李晓阳顾玮琳
Owner UNIV OF JINAN