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Process for preparing TiBw/Ti alloy-based composite material

A composite material and alloy-based technology, which is applied in the field of preparation of titanium alloy-based composite materials, can solve problems such as high cost, achieve the effects of reducing raw material costs, small difference in thermal expansion coefficient, and ensuring stability and compactness

Inactive Publication Date: 2008-12-31
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The invention provides a method for preparing titanium alloy-based composite materials, which solves the problem that the production of titanium alloy-based composite materials by the existing powder metallurgy method requires the use of high-cost titanium alloy powders with small particle sizes, and secondary processing is required to improve product mechanics. performance problem

Method used

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  • Process for preparing TiBw/Ti alloy-based composite material
  • Process for preparing TiBw/Ti alloy-based composite material
  • Process for preparing TiBw/Ti alloy-based composite material

Examples

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specific Embodiment approach 1

[0012] Specific embodiment one: the TiBw / Ti alloy matrix composite material of this embodiment is prepared according to the following steps: 1. Mechanical powder mixing: mix 1.01% to 6.06% of TiB by mass percentage 2 Powder and 98.99% to 93.94% titanium alloy powder are mechanically mixed with a ball mill, and the mixing time is 4 to 12 hours; 2. Hot pressing sintering: put the mixed composite powder into a vacuumized airtight container for hot pressing Sintering, the temperature is directly heated from room temperature to 1100-1500 ° C, the pressure is kept at 15-30 MPa, the pressure-holding time is 0.5-5 hours, and the titanium alloy-based composite material can be obtained after cooling to room temperature; wherein, the Ti alloy powder in step 1 The particle size is 180~300μm, TiB 2 The grain size of the alloy is 2-5 μm.

specific Embodiment approach 2

[0013] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the titanium alloy in step 1 is selected from α+β type dual-phase high-strength titanium alloys TC4-TC21 series. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0014] Embodiment 3: The difference between this embodiment and Embodiment 1 is that the titanium alloy in step 1 is selected from the TA15-TA19 series of near-alpha high-temperature titanium alloys. Other steps and parameters are the same as those in Embodiment 1.

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Abstract

Disclosed is a process for preparing a TiBw / Ti alloy-based composite material, which relates to a method for the preparation of a titanium alloy-based composite material. The invention provides the method for the preparation of the titanium alloy-based composite material, solving the problems of poor plasticity indexes, complex process and high cost when preparing the titanium alloy-based composite material in the prior art. The titanium alloy-based composite material is prepared according to the following steps of: firstly, mechanical mixing: namely mechanically mixing a TiB2 powder and a titanium alloy powder in weight percent by a ball mill, with the powder mixing time of 4 to 12 hours; and secondly, hot-pressing sintering: the mixed composite powders are put into a vacuumized closed vessel for hot-pressing sintering, the temperature directly rises to 1100 to 1500DEG C from the room temperature by heating, the pressure is maintained at between 15 and 30MPa, the holding time is 0.5 to 5 hours, and the titanium alloy-based composite material can be obtained after cooling the mixture to the room temperature. A matrix used by the method is 180 to 300mu m large particle size titanium alloy powder, and costs are effectively reduced.

Description

technical field [0001] The invention relates to a preparation method of a titanium alloy-based composite material. Background technique [0002] Due to the addition of other elements in titanium, many properties of titanium alloys are significantly better than pure titanium, so titanium alloy matrix composites have broader application prospects than pure titanium matrix composites. At present, the preparation methods of titanium alloy matrix composite materials with low energy consumption, relatively simple process and easy realization include melting casting method and powder metallurgy method. Titanium alloy matrix composites prepared by melting casting method are prone to defects such as shrinkage cavity, burning loss and coarse structure, resulting in low plasticity and low tensile strength. Although the powder metallurgy method solves the defects of the melting and casting method, it is generally believed by those skilled in the art that the particle size of the titani...

Claims

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Application Information

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IPC IPC(8): C22C1/04C22C14/00B22F3/14
Inventor 耿林黄陆军张杰李爱滨郑镇洙王桂松
Owner HARBIN INST OF TECH
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