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Fe-based alloy powder for hot-extrusion die laser cladding and application of Fe-based alloy powder

A technology of hot extrusion die and laser cladding, which is applied in the coating process and coating of metal materials, can solve the problems of differences in thermal expansion coefficient and elastic modulus, formation of holes and cracks, etc., achieve uniform hardness and prolong service life , combined with good results

Inactive Publication Date: 2020-05-22
SHIJIAZHUANG TIEDAO UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are obvious differences in thermal expansion coefficient and elastic modulus between the matrix alloy and the strengthening phase, which will lead to a temperature gradient in each phase in the molten pool, thereby causing thermal stress, and forming holes and cracks; In working conditions, the laser cladding coating should have good high-temperature hardness and high-temperature stability; therefore, in powder design and process implementation, obtaining a cladding layer that is well bonded to the substrate and has excellent high-temperature performance is of great significance for prolonging the service life of the mold. important meaning

Method used

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  • Fe-based alloy powder for hot-extrusion die laser cladding and application of Fe-based alloy powder
  • Fe-based alloy powder for hot-extrusion die laser cladding and application of Fe-based alloy powder
  • Fe-based alloy powder for hot-extrusion die laser cladding and application of Fe-based alloy powder

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Embodiment 1

[0032] In this embodiment, an Fe-based alloy powder used for laser cladding of hot extrusion dies includes the following components by mass percentage: C: 0.3%, Si: 0.8%, Mn: 0.2%, Cr: 4% , Mo: 1%, V: 0.8%, WC: 5%; Y 2 o 3 : 0.5%, Fe: 87.4%.

[0033] An application of Fe-based alloy powder for laser cladding of a hot extrusion die, specifically comprising the following steps:

[0034] (1) Pretreatment of the substrate: polish and clean the substrate, and use a hand grinding wheel to grind the substrate until the surface is smooth, no coarse scratches, and the direction of the scratches is consistent, and then use alcohol to clean to remove surface oil and dirt. Oxidized layer, dried for later use.

[0035] (2) Put the weighed powder into a mechanical powder mixer, and mix it fully to obtain cladding powder. The parameter of mechanical powder mixing is 20r / min, mix for 14 hours, and put it in a vacuum drying oven to dry after mixing. 8h, set the temperature at 80°C.

[003...

Embodiment 2

[0038] In this embodiment, an Fe-based alloy powder used for laser cladding of hot extrusion dies includes the following components by mass percentage: C: 0.5%, Si: 1.0%, Mn: 0.4%, Cr: 6% , Mo: 1.5%, V: 1.1%, WC: 20%; Y 2 o 3 : 2%, Fe: 67.5%.

[0039] An application of Fe-based alloy powder for laser cladding of a hot extrusion die, specifically comprising the following steps:

[0040] (1) Pretreatment of the substrate: polish and clean the substrate, and use a hand grinding wheel to grind the substrate until the surface is smooth, no coarse scratches, and the direction of the scratches is consistent, and then use alcohol to clean to remove surface oil and dirt. Oxidized layer, dried for later use.

[0041] (2) Put the weighed powder into a mechanical powder mixer and mix it fully to obtain a cladding powder. The parameter of the mechanical powder mix is ​​40r / min, mix for 8 hours, and put it in a vacuum drying oven to dry after mixing. 6h, set the temperature at 120°C.

...

Embodiment 3

[0044] In this embodiment, an Fe-based alloy powder used for laser cladding of hot extrusion dies includes the following components by mass percentage: C: 0.42%, Si: 0.86%, Mn: 0.35%, Cr: 4.5% , Mo: 1.3%, V: 1%, WC: 15%; Y 2 o 3 : 1.5%, Fe: 74.51%.

[0045] An application of Fe-based alloy powder for laser cladding of a hot extrusion die, specifically comprising the following steps:

[0046] (1) Pretreatment of the substrate: polish and clean the substrate, and use a hand grinding wheel to grind the substrate until the surface is smooth, no coarse scratches, and the direction of the scratches is consistent, and then use alcohol to clean to remove surface oil and dirt. Oxidized layer, dried for later use.

[0047] (2) Put the weighed powder into a mechanical powder mixer, and mix it fully to obtain cladding powder. The parameter of mechanical powder mixing is 35r / min, mix for 14 hours, and put it in a vacuum drying oven to dry after mixing. 10h, set the temperature at 120°C...

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Abstract

The invention belongs to the technical field of laser cladding, and particularly relates to Fe-based alloy powder for hot-extrusion die laser cladding and application of the Fe-based alloy powder. TheFe-based alloy powder comprises following components including, by mass percent, 0.3%-0.5% of C, 0.8%-1.0% of Si, 0.2%-0.4% of Mn, 4%-6% of Cr, 1%-1.5% of Mo, 0.8%-1.1% of V, 5%-20% of WC, 0.5%-2% ofY2O3, and the balance Fe, and the sum of mass percents of all the components is 100%. Y2O3 and WC are added at the same time, WC particles can be melted and become small to enter a cladding layer structure, a new strengthening phase is generated, the integral hardness of the cladding layer is uniform, the cutting performance is improved, tool breakage is avoided, the surface of the prepared cladding layer is good in feature, performance is stable and hardness is high at the high temperature, the service life of a die can be prolonged, and cost is low.

Description

technical field [0001] The invention belongs to the technical field of laser cladding, and relates to an Fe-based alloy powder used for laser cladding of a hot extrusion die, in particular to an Fe-based alloy powder used for laser cladding of a hot extrusion die and an application thereof. Background technique [0002] During the service process of the hot extrusion die, after tens of thousands of times of mold opening and closing, it is subjected to long-term alternating stress, and the mold is in contact with the high-temperature billet for a long time during use, which reduces the surface strength of the mold. The failure mode of the surface will shorten the effective service life, reduce the production efficiency of the product, and increase the manufacturing cost. Therefore, the repair of the mold and the improvement of the life of the mold have become the focus of the research of the mold enterprise. [0003] At present, surfacing welding technology is mainly used fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10C22C38/02C22C38/04C22C38/22C22C38/24
CPCC23C24/103C22C38/02C22C38/04C22C38/22C22C38/24C22C38/005
Inventor 郝昊齐海波张华刘博曹雅彬韩日宏任德亮
Owner SHIJIAZHUANG TIEDAO UNIV
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