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In-situ SiC particle reinforced Ti6Al4V preparation method

A particle-reinforced, in-situ technology, applied in the new preparation field of SiC-Ti6Al4V, can solve the problems of reduced strength and weak grain boundaries of composite materials

Inactive Publication Date: 2013-08-07
ZHONGYUAN ENGINEERING COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the phenomenon that the existing SiC-Ti6Al4V is prone to weak grain boundary connection and the strength of the composite material is reduced, and the in-situ SiC reinforced Ti6Al4V composite material is carried out

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] A preparation method of in-situ SiC particle reinforced Ti6Al4V, its steps are as follows: (1) put Si powder and C powder into high-energy grinding equipment for mechanical alloying, grind for 48 hours, the mass ratio of Si powder and C powder is 2:1, then add SiO 2 Powder, SiO 2 The amount of powder added is 20% of the total mass of Si powder and C powder, and the mixture is obtained by continuing to grind for 10 hours; (2) Mix titanium powder, master alloy powder and the mixture in step (1) evenly, and the addition of titanium powder The amount is 95% of the total mass of titanium powder and master alloy powder, the addition of master alloy powder is 5% of the total mass of titanium powder and master alloy powder, and the addition of the mixture is 5% of the total mass of titanium powder and master alloy powder. %, molded into a billet; (3) The billet in step (2) is sintered in a vacuum sintering furnace in two stages, sintered at 700°C for 0.5 hours, then heated to ...

Embodiment 2

[0015] A preparation method of in-situ SiC particle reinforced Ti6Al4V, its steps are as follows: (1) put Si powder and C powder into high-energy grinding equipment for mechanical alloying, grind for 8 hours, the mass ratio of Si powder and C powder is 3:1, then add SiO 2 Powder, SiO 2 The amount of powder added is 5% of the total mass of Si powder and C powder, and the mixture is obtained by continuing to grind for 10 hours; (2) Mix titanium powder, master alloy powder and the mixture in step (1) evenly, and the addition of titanium powder The amount is 80% of the total mass of titanium powder and master alloy powder, the addition of master alloy powder is 15% of the total mass of titanium powder and master alloy powder, and the addition of the mixture is 20% of the total mass of titanium powder and master alloy powder. %, molded into a blank; (3) The blank in step (2) is sintered in a vacuum sintering furnace in two stages, sintered at 800 ° C for 0.5-3 hours, and then heat...

Embodiment 3

[0017] A preparation method of in-situ SiC particle reinforced Ti6Al4V, its steps are as follows: (1) put Si powder and C powder into high-energy grinding equipment for mechanical alloying, grind for 30 hours, the mass ratio of Si powder and C powder is 2.5:1, then add SiO 2 Powder, SiO 2 The amount of powder added is 15% of the total mass of Si powder and C powder, and the mixture is obtained by continuing to grind for 8 hours; (2) Mix titanium powder, master alloy powder and the mixture in step (1) evenly, and the addition of titanium powder The amount is 90% of the total mass of titanium powder and master alloy powder, the addition of master alloy powder is 10% of the total mass of titanium powder and master alloy powder, and the addition of the mixture is 30% of the total mass of titanium powder and master alloy powder. %, molded into a billet; (3) The billet in step (2) is sintered in a vacuum sintering furnace in two stages, sintered at 800 ° C for 2 hours, then heated ...

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Abstract

The invention discloses an in-situ SiC particle reinforced Ti6Al4V preparation method. The method comprises the following steps: (1) putting Si powder and C powder into high-energy grinding equipment for mechanical alloying, grinding for 8-48 hours, wherein the mass ratio of the Si powder to the C powder is (2-3):1, then adding SiO2 powder which accounts for 5-20% of the total mass of the Si powder and the C powder, and further grinding for 4-10 hours to obtain a mixed material; (2) uniformly mixing titanium powder, master alloy powder and the mixed material, wherein the addition amount of the titanium powder accounts for 80-95% of the total mass of the titanium powder and the master alloy powder, the addition amount of the master alloy powder accounts for 5-20% of the total mass of the titanium powder and the master alloy powder, the addition amount of the mixed material accounts for 5-40% of the titanium powder and the master alloy powder, and compression molding to produce blanks; and (3) sintering the blanks in a vacuum sintering furnace for two stages at 700-900 DEG C for 0.5-3 hours, then heating to be 1300-1500 DEG C and sintering in an argon atmosphere for 0.5-3 hours. The reinforcement phase of a composite material obtained by the method is produced in situ, interfaces are densely connected together, and the composite material has high strength and is suitable for industrial scale.

Description

technical field [0001] The invention relates to a new preparation technology of SiC-Ti6Al4V and the technical field of improving strength. Background technique [0002] Ti6Al4V has the advantages of high specific strength, good thermal strength, corrosion resistance and good biocompatibility, etc., and has been successfully used in aerospace, petrochemical, biomedical and other fields, but its poor wear resistance and easy adhesion have limited Therefore, the development of SiC reinforced composite materials is a necessary choice. [0003] Ti6Al4V alloy parts prepared by casting and forging techniques have been successfully applied in high-tech fields, such as fuselage structural parts of military and commercial aircraft. However, the production of titanium alloys by forging and casting methods hinders its wider application due to complex processes, low yield, high product costs and difficulties in subsequent processing. Powder metallurgy titanium alloy research began in t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/05C22C14/00
Inventor 张小立王志新张瑞杰刘红燕刘英张照军
Owner ZHONGYUAN ENGINEERING COLLEGE
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