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Laser cladding alloy powder and laser cladding method for H13 die steel

A technology of laser cladding and alloy powder, which is applied in surface engineering applications and the field of surface engineering, can solve problems such as microscopic cracks in the cladding layer, and achieve the effects of improving wettability, good metallurgical bonding, high wear resistance and corrosion resistance

Pending Publication Date: 2019-07-30
XIAN UNVERSITY OF ARTS & SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Relevant researchers used laser cladding technology to prepare Ni-based and Co-based cladding layers on the H13 steel substrate, but there is a certain difference in thermal expansion coefficient between the H13 steel substrate and the Ni / Co cladding layer, and the cladding layer is easy to produce Different degrees of microscopic cracks

Method used

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  • Laser cladding alloy powder and laser cladding method for H13 die steel
  • Laser cladding alloy powder and laser cladding method for H13 die steel
  • Laser cladding alloy powder and laser cladding method for H13 die steel

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Experimental program
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Effect test

Embodiment 1

[0038]H13 mold steel (size: 50mm×30mm×10mm) was selected as the substrate for pretreatment before cladding: degreasing, derusting and sanding until the surface roughness was Ra=0.2μm, and finally cleaned with acetone and alcohol.

[0039] With argon as the protective atmosphere, laser cladding is carried out by using LDM2000 multifunctional CNC laser cladding machine. Among them, the overlap coefficient is 0.6, the power P is 700W, the spot diameter D is 3mm, and the scanning speed V S 300mm / s, powder feeding speed V f It is 18g / s.

[0040] In this embodiment, 90% H13 + 10% nickel-coated WC alloy powder is used for laser cladding, and the particle size of the alloy powder is 150 μm; the substrate preheating temperature is 150° C.

[0041] Table 1 Composition wt% of H13 alloy powder

[0042]

[0043]

[0044] The cladding layer of the cladding sample has a bright appearance, no cracks, and good formability. It forms a phase structure dominated by ferrite and supplement...

Embodiment 2

[0046] H13 mold steel (size: 50mm×30mm×10mm) was selected as the substrate for pretreatment before cladding: degreasing, derusting and sanding until the surface roughness was Ra=0.2μm, and finally cleaned with acetone and alcohol.

[0047] With argon as the protective atmosphere, laser cladding is carried out by using LDM2000 multifunctional CNC laser cladding machine. Among them, the power P is 900W, the spot diameter D is 3mm, and the scanning speed V S 350mm / s, powder feeding speed V f It is 20g / s.

[0048] In this embodiment, 70% H13 + 30% WC alloy powder is used for laser cladding, the particle size of the alloy powder is 180 μm, and the substrate preheating temperature is 200° C.

[0049] Among them, the composition of the H13 alloy powder is shown in Table 1.

[0050] Table 1 Composition wt% of H13 alloy powder

[0051]

[0052] The cladding layer of the cladding sample has a bright appearance, no cracks, and good formability. It forms a phase structure dominated...

Embodiment 3

[0054] H13 mold steel (size: 50mm×30mm×10mm) was selected as the substrate for pretreatment before cladding: degreasing, derusting and sanding until the surface roughness was Ra=0.2μm, and finally cleaned with acetone and alcohol.

[0055] With argon as the protective atmosphere, laser cladding is carried out by using LDM2000 multifunctional CNC laser cladding machine. Among them, the power P is 600W, the spot diameter D is 4mm, and the scanning speed V S 400mm / s, powder feeding speed V f It is 25g / s.

[0056] In this embodiment, 50% H13 + 50% WC alloy powder is used for laser cladding, the particle size of the alloy powder is 300 μm, and the substrate preheating temperature is 350° C.

[0057] Among them, the composition of the H13 alloy powder is shown in Table 1.

[0058] Table 1 Composition wt% of H13 alloy powder

[0059]

[0060] The cladding layer of the cladding sample has a bright appearance, no cracks, and good formability. It forms a phase structure dominated...

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Abstract

The invention discloses laser cladding alloy powder and a laser cladding method for H13 die steel. The the laser cladding method comprises the following steps that re-treating is carried out on a matrix before cladding; H13 plus nickel-clad WC alloy powder is prepared for laser cladding; the matrix is preheated; and a laser cladding machine is adopted, argon is used as protective gas, an optical fiber laser is an emitting laser source, the prepared laser cladding H13 plus nickel-clad WC alloy powder through a conical powder beam coaxial powder feeding mode is subjected to multi-channel lap joint to the matrix for laser cladding, laser cladding is carried out by controlling the laser power, the light spot diameter, the scanning speed and the powder feeding speed of laser cladding, and lasercladding of the H13 die steel is modulated and then is completed. According to the laser cladding method, the cladding layer forms a grain boundary strengthening type network structure, and has the characteristics of low friction coefficient, high wear resistance, high corrosion resistance and the like. The problem of dilution rate is reduced, the thermal stress is reduced, the metallurgical bonding with the matrix is increased, and the problem of easy cracking of large-area multi-channel lap joint is solved.

Description

technical field [0001] The invention belongs to the technical field of surface engineering, in particular to a laser cladding alloy powder and a strengthening method for improving the surface mechanical properties and corrosion resistance of H13 die steel, and belongs to the technical field of surface engineering applications. Background technique [0002] Mechanical parts will be subject to surface wear and corrosion under different working conditions during service. Surface strengthening technology is a very important creative work in the field of surface engineering, and it is also a strategic requirement for environmental protection and sustainable development of resources. [0003] H13 steel is widely used in service environments with large shock and vibration loads, including making important components in the aviation industry, or hot forging dies, die-casting dies, hot extrusion dies, etc. This type of steel is based on Cr, Mo, V, W is the main strengthening element,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10C22C38/46C22C38/44C22C38/04C22C38/02
CPCC23C24/103C22C38/04C22C38/44C22C38/46C22C38/02
Inventor 畅庚榕郭岩刘明霞谢燕翔徐可为孟瑜
Owner XIAN UNVERSITY OF ARTS & SCI
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