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Flexible film laser cladding reinforcing method of die-casting die

A die-casting mold and laser cladding technology, which is applied in coating, metal material coating process, etc., can solve the problems of metal powder waste, difficulty in ensuring uniform powder delivery, etc., to save materials, improve powder utilization, and improve performance. Effect

Active Publication Date: 2019-07-23
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the process of strengthening the die-casting mold by laser cladding technology, due to the existence of various special curved surfaces, pointed surfaces, sharp points, and elevations of the die-casting mold, it is difficult to ensure powder delivery even if the coaxial powder feeding method is used in the cladding process. Uniformity; at the same time, during the cladding process of the curved surface, the coaxial powder feeding metal powder is seriously wasted, and the effective utilization rate of the powder is only about 40%.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] First of all, use a three-coordinate measuring instrument to conduct a comprehensive inspection of the die-casting mold to determine the amount of wear of the mold; use machining to remove the fatigue wear layer on the surface, and the removal amount on one side is 0.2mm; use anhydrous alcohol to clean the processing surface to remove oil and other impurities ; Preparation of alloy powder, each component according to the mass percentage is: C: 0.30%, Cr: 4.78%, Mo: 1.42%, Si: 0.95%, Mn: 0.30%, the balance is Fe, the particle size of the alloy powder is 350 -450 mesh; use plastic wrap to pre-set alloy powder, first apply 0.05mm latex glue evenly on one side of the plastic wrap, wait for the latex glue to dry slightly, spray the prepared alloy powder evenly on the latex glue with an electrostatic powder sprayer, and use Rolling with a manual roller press, control the thickness of the powder to 0.6mm, and make a flexible film coated with powder on one side; attach the other...

Embodiment 2

[0028] First of all, use a three-coordinate measuring instrument to conduct a comprehensive inspection of the die-casting mold to determine the amount of wear of the mold; use machining to remove the fatigue wear layer on the surface, and the removal amount on one side is 0.3mm; use anhydrous alcohol to clean the processing surface to remove oil and other impurities ; Preparation of alloy powder, each component according to the mass percentage is: C: 0.35%, Cr: 5.02%, Mo: 1.50%, Si: 1.05%, Mn: 0.35%, the balance is Fe, and the particle size of the alloy powder is 350 -450 mesh; use plastic wrap to preset alloy powder, first apply 0.1mm milky white glue evenly on one side of the plastic wrap, wait for the milky white glue to dry slightly, spray the prepared alloy powder evenly on the milky white glue with an electrostatic powder sprayer, and use Rolling with a manual roller press, control the powder thickness to 0.8mm, and make a flexible film coated with powder on one side; att...

Embodiment 3

[0030] First of all, use a three-coordinate measuring instrument to conduct a comprehensive inspection of the die-casting mold to determine the amount of wear of the mold; use machining to remove the fatigue wear layer on the surface, and the removal amount on one side is 0.2mm; use anhydrous alcohol to clean the processing surface to remove oil and other impurities ; Preparation of alloy powder, each component according to the mass percentage is: C: 0.30%, Cr: 5.02%, Mo: 1.50%, Si: 1.05%, Mn: 0.30%, the balance is Fe, and the particle size of the alloy powder is 350 -450 mesh; use plastic wrap to pre-set alloy powder, first apply 0.05mm latex glue evenly on one side of the plastic wrap, wait for the latex glue to dry slightly, spray the prepared alloy powder evenly on the latex glue with an electrostatic powder sprayer, and use Rolling with a manual roller press, control the thickness of the powder to 0.6mm, and make a flexible film coated with powder on one side; attach the o...

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PUM

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Abstract

The invention discloses a flexible film laser cladding reinforcing method of a die-casting die. The method includes the steps that the die-casting die is detected comprehensively, and the abrasion loss of the die is determined; a surface fatigue wear layer is removed, and machining surface impurities are removed; alloy powder is prepared, the alloy powder is prearranged on the surface of the to-be-clad die-casting die, a prearranged flexible film is scanned through a laser, and a wearproof laser cladding layer is prepared; and the surface of the cladding layer is nondestructively detected, andthe cladding layer is ground and polished. By means of the method, the utilization rate of the powder in the cladding process is increased, it is guaranteed that the powder is uniformly conveyed, thereinforcing cost is reduced, and the service life of the repaired die-casting die is prolonged by one time or above compared with a conventional repairing method.

Description

technical field [0001] The invention relates to the technical field of metal surface treatment, in particular to a flexible film laser cladding strengthening method for a die-casting mold. Background technique [0002] Die casting is a casting method that injects molten metal such as aluminum alloy into a mold through high-speed and high-pressure injection to efficiently manufacture parts with high dimensional accuracy and good surface quality. It is widely used in the manufacture of automobiles, OA equipment, home appliances, construction and other components. Among them, the die-casting mold is subjected to thermal shock and thermal fatigue caused by heating and cooling, and various damages occur, which affect the dimensional accuracy and appearance quality of die-casting products. [0003] The main cause of die-casting mold damage is thermal cracks caused by thermal stress and thermal fatigue, of which more than 70% of the damage is thermal cracks. In order to prevent ho...

Claims

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Application Information

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IPC IPC(8): C23C24/10C22C38/22C22C38/02C22C38/04B22F1/00B22D17/22
CPCB22D17/2209B22F1/0003C22C38/02C22C38/04C22C38/22C23C24/103
Inventor 付宇明赵华洋付晨张钰郑丽娟
Owner YANSHAN UNIV
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