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Method for preparing quasi-crystallized composite through laser processing

A composite material and laser processing technology, applied in the direction of metal material coating process, coating, etc., can solve the problems such as the decrease of the microhardness distribution of the deposited layer, and achieve the effect of easy popularization and application, strong applicability, and simple and convenient process

Active Publication Date: 2017-03-29
SHANDONG JIANZHU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the strong dilution effect of the substrate on the laser melt pool during the laser melting deposition process, the microhardness distribution of the deposited layer shows an obvious downward trend along the layer depth.

Method used

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  • Method for preparing quasi-crystallized composite through laser processing
  • Method for preparing quasi-crystallized composite through laser processing
  • Method for preparing quasi-crystallized composite through laser processing

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Embodiment 1

[0028] Before laser melting deposition, the surface of TC17 titanium alloy was cleaned with gasoline and alcohol, wiped and dried. The box used in the laser processing process is filled with argon gas as a shielding gas. Water glass and pure water are fully mixed according to the volume ratio of 1:2.5 to form a water glass solution; finally, the volume fraction of the water glass solution is 12.5% ​​La 2 o 3 Pour the powder into the solution to fully mix the powder with the melt; use an experimental brush to mix the La 2 o 3 The water glass solution is evenly coated on the surface of the TC11 wire to be tested, and air-dried naturally. The mixed powder of 87Stellite SF 12-8NB-5Mo (wt.%) was coated with La 2 o 3 The wire (at a 45-degree angle to the surface of the substrate) is simultaneously laser-deposited on the surface of the TC17 titanium alloy.

[0029] Specific process steps:

[0030] (1) Before laser melting and deposition, the surface of TC17 titanium alloy was ...

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Abstract

The invention discloses a method for preparing a quasi-crystallized composite through laser processing. The method comprises the specific steps that a certain mass proportion of Stellite SF 12-NB-Mo mixed powder is dried and fully mixed, and argon is adopted as the protective gas; a laser, a coaxial powder feeder and a synchronous wire feeder are adopted for conducting laser melting deposition treatment on the surface of a titanium alloy, wherein according to process parameters, the laser power is 1.00-4.80 kW, the spot diameter is 0.3-4.0 mm, the laser beam scanning speed is 12-18 mm / s, the powder feeding rate is 6-32 g / min, the multichannel overlapping rate is 18-55%, and the wire feeding speed is 8-15 mm / s; and meanwhile, La2O3-coated TC11 wires are fed to the edge of a molten bath at a certain angle, and after the powder and the wires are subjected to laser processing at the same time, a laser melting deposition composite can be obtained. The laser coaxial powder feeding mode is adopted for melting a SiMn powder laser alloy to the surface of the composite, so that the quasi-crystallized composite is formed. By adoption of the method for preparing the quasi-crystallized composite through laser processing, the composite with the surface appearance and the microhardness remarkably improved can be obtained.

Description

technical field [0001] The invention relates to a green, high-efficiency and energy-saving method for realizing quasi-crystallization on the surface of a titanium alloy, which belongs to the technical field of material surface strengthening. In particular, it relates to a method for quasi-crystallizing laser melting deposition composite materials in an argon environment by using laser synchronous melting powder wire feeding technology. Background technique [0002] As one of the key technologies in the field of additive manufacturing, laser fuse deposition technology has been applied in some aviation industry products. Compared with the widely used laser fused powder deposition technology, the laser fused wire deposition technology has many advantages such as high material utilization rate, fast speed, green environmental protection, fewer defects in the deposited layer and a finer structure. The laser fuse deposition technology can realize the nanometerization of the workp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10
CPCC23C24/103
Inventor 李嘉宁景财年张元彬刘鹏袁兴栋李嘉宸石磊董琬晴
Owner SHANDONG JIANZHU UNIV
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