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Ternary boride and carbide reinforced cermet powder for laser cladding additive manufacturing and its preparation and application

A ternary boride and cermet technology, used in the field of powder materials, can solve the problems of poor impact resistance, easy cracking on the surface, easy to fall off, etc., and achieve excellent crack resistance, high deposition speed, and high bonding strength. Effect

Active Publication Date: 2021-04-02
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cladding alloy layer contains more coarse columnar M 7 C 3 Carbide, easy to fall off under impact load, poor impact resistance, and prone to cracks on the surface

Method used

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  • Ternary boride and carbide reinforced cermet powder for laser cladding additive manufacturing and its preparation and application
  • Ternary boride and carbide reinforced cermet powder for laser cladding additive manufacturing and its preparation and application

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preparation example Construction

[0037] The preparation method of the alloy powder for laser cladding additive manufacturing of the present invention comprises the following steps:

[0038] (1) Ingredients: choose metal Mo, ferroboron, monomeric boron, metal chromium, graphite, ferrotitanium, sponge titanium, pure iron as raw materials, according to the mass percentage of elements 25-40% Mo, 3-5% B, 30 -35% Cr, 3-5% C, 1-3% Ti, and the rest is Fe to prepare charge.

[0039] (2) Melting: Heating and melting the charge prepared in step (1) in a vacuum furnace, the vacuum degree is 2 FeB 2 , TiC, Cr 7 C 3 Strengthen the phase and homogenize it by magnetic stirring to obtain an alloy melt;

[0040] (3) Atomization: import the obtained alloy melt into the atomization bag for atomization. Before atomization, ensure that the temperature of the alloy melt is not lower than 1850°C, and the gas atomization pressure is 3.0MPa~5MPa. Under the impact of high-pressure gas flow, Mo 2 FeB 2 Ternary boride and carbide c...

Embodiment 1

[0045] (1) Ingredients: choose metal Mo, ferroboron, monomeric boron, metal chromium, graphite, ferrotitanium, sponge titanium, pure iron as raw materials, according to the mass percentage of elements 40% Mo, 3% B, 30% Cr, 3 %C, 3%Ti, and the rest is Fe to prepare charge.

[0046] (2) Melting: Heating and melting step (1) prepared charge in a vacuum furnace with a vacuum degree of 0.5 Pa to remove gaseous impurities in the alloy liquid and prevent the alloy liquid from oxidation; the melting temperature is 1700°C to ensure that the next process alloy The superheat of the liquid is 150°C. If the melting temperature is outside this range, it will easily lead to incomplete melting. Continue to smelt for 1.0 hour after the charge is liquefied, and Mo is generated during the smelting process 2 FeB 2 , TiC, Cr 7 C 3 Strengthen the phase and homogenize it by magnetic stirring to obtain an alloy melt;

[0047] (3) Atomization: import the obtained alloy melt into the atomization p...

Embodiment 2

[0052] (1) Ingredients: choose metal Mo, ferroboron, monomeric boron, metal chromium, graphite, ferrotitanium, sponge titanium, pure iron as raw materials, according to the mass percentage of elements 25% Mo, 5% B, 35% Cr, 5 %C, 1%Ti, and the rest is Fe to prepare charge.

[0053] (2) Melting: Heating and melting the charge in step (1) in a vacuum furnace, with a vacuum degree of 0.1 Pa, to remove gas impurities in the alloy liquid and prevent the oxidation of the alloy liquid; the melting temperature is 2000°C to ensure the alloy liquid in the next process The degree of superheat is 300°C. If the melting temperature is outside this range, it will easily lead to incomplete melting. After the charge was liquefied, the smelting was continued for 2.0 hours, and Mo was generated during the smelting process. 2 FeB 2 , TiC, Cr 7 C 3 Strengthen the phase and homogenize it by magnetic stirring to obtain an alloy melt;

[0054] (3) Atomization: import the obtained alloy melt into ...

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Abstract

The invention relates to ternary boride and carbide strengthened cermet powder for laser cladding additive manufacturing and preparation and application thereof. The ternary boride and carbide strengthened cermet powder comprises, by mass percent, 25-40% of Mo, 3-5% of B, 30-35% of Cr, 3-5% of C, 1-3% of Ti and the balance Fe. The alloy powder is used for laser cladding additive manufacturing, andis high in cladding speed and high in productivity, and base body metal and laser cladding as-deposited metal are at a metallurgical bonding state and are high in bonding strength, low in heat inputand low in dilution rate. A strengthening phase is evenly distributed in the powder, and the composite powder with the composition uniformity, a high sphericity degree and less satellite balls is obtained.

Description

technical field [0001] The invention belongs to the field of powder materials, in particular to a cermet alloy powder strengthened by ternary borides and carbides for laser cladding additive manufacturing, which can be used for laser cladding additive manufacturing and remanufacturing of the working layer of impact-resistant and wear-resistant parts . Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] Since the "birth" of additive manufacturing (3D printing) technology in the 1990s, the printing of polymer materials has gradually focused on the printing of metal powders from the beginning. Technical advantages such as complexity constraints, high material utilization rate, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C30/00C22C1/10B22F9/08B22F1/00B22F10/28C23C24/10B33Y70/10B33Y80/00
CPCB22F9/082B22F2009/0824B33Y70/00B33Y80/00C22C1/1042C22C27/04C22C27/06C22C30/00C22C32/0047
Inventor 孙俊生徐虎高进强澹台凡亮杜学芸左增民
Owner SHANDONG UNIV
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