Laser synthesis preparation method of intermetallic compound and granule reinforced composite material

A technology of intermetallic compound and laser synthesis, which is applied in the field of synthesis and manufacturing of intermetallic compound, to achieve the effect of satisfying performance, low production cost, and good comprehensive mechanical properties of materials

Inactive Publication Date: 2004-11-17
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a new method for preparing Ni-Al-Fe intermetallic compounds and in-situ particle-reinforced intermetallic compound-bas

Method used

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  • Laser synthesis preparation method of intermetallic compound and granule reinforced composite material
  • Laser synthesis preparation method of intermetallic compound and granule reinforced composite material
  • Laser synthesis preparation method of intermetallic compound and granule reinforced composite material

Examples

Experimental program
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Effect test

Example Embodiment

[0031] Example 1:

[0032] Preparation of Ni20Al30Fe Intermetallic Compound by Laser Synthesis

[0033] Ordinary binary NiAl intermetallic compounds have high melting point, good thermal conductivity, and high temperature oxidation resistance, but their brittleness is relatively large and difficult to be applied in engineering practice. By adding Fe as an alloy element, it can significantly improve its room temperature plasticity and improve its performance. The present invention is implemented in laser synthesis to prepare Ni20Al30Fe intermetallic compound, and the method is:

[0034] (1) Using Ni-coated Al powder, pure Al, and pure Fe powder elemental powder as raw materials, adding 10wt% of pure Al powder to compensate for the burned Al content in the composite material according to the atomic percentage of Ni20Al30Fe. The powder size is- 150 mesh ~ +200 mesh, the above powders are mechanically stirred and mixed, and kept in an oven at 100°C for 1 hour to remove moisture;

[00...

Example Embodiment

[0039] Example 2:

[0040] Preparation of TiC particle reinforced Ni-Al-Fe intermetallic compound matrix composite by laser synthesis

[0041] NiAl intermetallic compound is added with Fe as an alloying element to obtain Ni20Al30Fe (at.%), which has high room temperature plasticity and toughness. On this basis, 20% TiC (wt.%) is added to prepare a particle-reinforced intermetallic compound matrix composite The material can ensure the high temperature strength of the alloy, thereby obtaining good comprehensive mechanical properties. The present invention is implemented in laser synthesis to prepare TiC particle reinforced Ni20Al30Fe intermetallic compound-based composite material, and the method is:

[0042] (1) Using Ni-coated Al powder, pure Al, and pure Fe powder elemental powders, according to the atomic percentage of Ni20Al30Fe, an additional 30wt% of pure Al powder is added to compensate the burned Al content in the composite material, and 20wt is added to the above powder % ...

Example Embodiment

[0047] Example 3:

[0048] The present invention is implemented in laser synthesis to prepare TiAl intermetallic compound, and the method is:

[0049] (1) Using pure Ti and pure Al powder element powder as raw materials, according to the atomic percentage of TiAl, additional 20wt% pure Al powder and 15wt% pure Ti powder are added to compensate the burned Al and Ti content in the composite material. The particle size of the powder is from -150 mesh to +200 mesh. The above powder is mechanically stirred and mixed, and kept in an oven at 100°C for 2 hours to remove moisture;

[0050] (2) Using high-power diode laser, laser power 5000W, focusing into a spot with a diameter of 6mm, at a scanning speed of 2m / min, irradiating the cleaned and polished mild steel surface to form a local molten pool;

[0051] (3) While the laser melts the substrate to form a local molten pool, the mixed powder is fed into the molten pool by the lateral powder feeding method, and the physical metallurgy and ...

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Abstract

The invention relates to a laser synthesis preparation method of intermetallic compound and granule reinforced composite material which includes, using the powder stock containing the same elements with the intermetallic compound to be prepared, adding additionally elements during the process of sedimentation and mixing, forming local molten pool on the base material surface through high power laser irradiation, feeding the mixed powder into molten pool, stacking up to obtain large area coating, block material or formed parts, adjusting powder components or laser technique to obtain intermetallic compound or particle reinforcement intermetallic composite material with dissimilar compositions, structure and property.

Description

technical field [0001] The invention relates to a method for synthesizing and preparing intermetallic compounds and intermetallic compound-based particle-reinforced composite materials based on the principle of laser cladding, in particular to a method for preparing Ni-Al-Fe intermetallic compounds and in-situ particle-reinforced intermetallic compounds by laser synthesis The invention discloses a method for a matrix composite material, belonging to the technical field of synthesis and manufacture of intermetallic compounds. Background of the invention [0002] Intermetallic compounds have excellent high-temperature properties, and are ideal high-temperature structural materials with potential applications, and have broad application prospects in the fields of aviation, aerospace, and energy. However, the room temperature brittleness of intermetallic compounds is very high, which deteriorates the comprehensive performance of intermetallic compounds and also creates obstacles...

Claims

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Application Information

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IPC IPC(8): B22F3/105C22C1/04
Inventor 钟敏霖徐向阳刘文今孙鸿卿
Owner TSINGHUA UNIV
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