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Hot work mold laser alloying coating and preparation method and laser alloying method

A technology of laser alloying and hot-working molds, which is applied in metal processing equipment, metal material coating technology, coatings, etc., can solve the problems of short service life of hot-working molds, pores and cracks in alloy components, and improve the use of Improvement of service life, sticking to steel, and low coefficient of friction

Active Publication Date: 2019-01-01
CHONGQING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the above-mentioned deficiencies in the prior art, the present invention provides a laser alloying coating for hot work molds to solve the technical problems of defects such as pores, inclusions, and cracks in the existing alloy components, and correspondingly provides its preparation method. At the same time, it provides Using the laser alloy coating to carry out the laser alloying method on the surface of the mold to solve the problem of short service life of the hot work mold for surface treatment in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The raw material of laser alloying coating for preparing a kind of hot working mold adopts the following mass parts to calculate: SiO 2 25 parts, TiB 2 22 parts, Nb 21 parts, W 24 parts, Hf 24 parts, Al 20~25 parts, Si 21 parts, Be 24 parts, bentonite 23 parts, shellac 10 parts, absolute ethanol 380 parts. Among them: SiO 2 、TiB 2 , Nb, W, Hf, Al, Si, Be and bentonite are all in powder form, and their particle sizes are all below 3 microns.

[0032] The specific preparation steps of laser alloying coating for hot work mold are as follows:

[0033] 1) SiO 2 、TiB 2 , Nb, W, Hf, Al, Si, Be and bentonite were respectively crushed to a particle size of less than 3 microns, and then mixed evenly to obtain alloy powder for later use.

[0034] 2) Dissolve the shellac with a part of absolute ethanol to obtain an ethanol solution of shellac for later use.

[0035] 3) Stir the alloy powder, the ethanol solution of shellac and another part of absolute ethanol with a mixer to...

Embodiment 2

[0043] The raw materials for the preparation of laser alloying coatings for hot work molds are calculated using the following parts by mass: SiO 2 25 parts, TiB 2 22 parts, Nb 21 parts, W 24 parts, Hf 24 parts, Al 21 parts, Si 20 parts, Be 24 parts, bentonite 23 parts, shellac 10 parts, absolute ethanol 380 parts. Among them: SiO 2 、TiB 2 , Nb, W, Hf, Al, Si, Be and bentonite are all in powder form, and their particle sizes are all below 3 microns.

[0044] The specific preparation steps of the laser alloy coating are:

[0045] 1) SiO 2 、TiB 2 , Nb, W, Hf, Al, Si, Be and bentonite were respectively crushed to a particle size of less than 3 microns, and then mixed evenly to obtain alloy powder for later use.

[0046] 2) Dissolve the shellac with a part of absolute ethanol to obtain an ethanol solution of shellac for later use.

[0047] 3) Stir the alloy powder, the ethanol solution of shellac and another part of absolute ethanol with a mixer to get the laser alloy coat...

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Abstract

The invention discloses a hot work mold laser alloying coating, a preparation method and a laser alloying method. The laser alloy coating includes the following raw materials in parts by mass: SiO2 20~30 parts, TiB220~25 parts, Nb 20~25 parts, W 20~25 parts, Hf 20~25 parts, Al 20~25 parts, Si 20~25 parts , Be 20~25 parts, bentonite 15~25 parts, shellac 6~10 parts, absolute ethanol 300~400 parts. It can effectively avoid defects such as pores, inclusions, and cracks. Its preparation method is to crush SiO2, TiB2, Nb, W, Hf, Al, Si, Be and bentonite respectively to a particle size less than 3 microns, then mix uniformly to obtain alloy powder, and dissolve shellac with a part of absolute ethanol to form shellac Ethanol solution, finally the ethanol solution of alloy powder, shellac and another part of absolute ethanol can be stirred evenly with a mixer. The laser alloying method of the mold surface is to place the mold in the above-mentioned laser alloy coating for a certain period of time, then take out the mold, and use a laser for melting treatment in an argon flow to complete the laser alloying of the mold surface.

Description

technical field [0001] The invention belongs to the technical field of material surface treatment and strengthening, and in particular relates to a laser alloying coating for a hot work mold, a preparation method and a laser alloying method. Background technique [0002] Hot work molds are subjected to variable stress and impact at high temperatures, and the molding temperature of the workpiece is often above 1000°C. It also has to withstand high temperature oxidation, burning, and thermal shock caused by thermal changes under strong water cooling conditions. When in service, it needs to bear the loads of high stress, thermal shock, thermal wear and corrosion, so the life of the mold is very low. In order to improve the life, the main method currently used is surface strengthening. Conventional methods include quenching, carburizing, nitriding, etc., but the effects of these methods are very limited, because the hot work mold works in a high temperature environment, and the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/10B22F1/00C22C30/00C22C32/00
CPCC22C30/00C22C32/0005C23C24/103B22F1/107
Inventor 黄灿唐义洲涂坚柴林江周志明迟露鑫
Owner CHONGQING UNIV OF TECH
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