Method for preparing ultra-fine grain titanium-based composite material by adopting equant bending channel deformation

A technology of equal-diameter bending of titanium-based composite materials, applied in the field of preparation of ultra-fine-grained titanium-based composite materials, to achieve the effect of improving strength and toughness

Active Publication Date: 2014-02-12
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Domestic research reports on the ECAP de

Method used

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  • Method for preparing ultra-fine grain titanium-based composite material by adopting equant bending channel deformation
  • Method for preparing ultra-fine grain titanium-based composite material by adopting equant bending channel deformation
  • Method for preparing ultra-fine grain titanium-based composite material by adopting equant bending channel deformation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The (TiB+TiC) / TC18 titanium-based composite material with a TiB:TiC molar ratio of 4:1 was cut into samples with a size of 10mm×10mm×100mm by a wire electric discharge machine, and the surface cut marks were ground off by a grinder. The deformation and extrusion test of the equal-diameter curved channel was carried out on a YA32-315 four-column universal hydraulic press. First adjust the press to lower it to a suitable height; put the mold into the heating furnace to preheat to 100°C (it can be any value from 100°C to 200°C, 100°C is selected in this embodiment), and keep it warm for 20 minutes (it can be Any value of 10 to 20 minutes, 20 minutes is selected in this embodiment) and then taken out, evenly smear molybdenum disulfide + graphite lubricant in the channel, the sample is also preheated to 100 ° C, after 20 minutes of heat preservation, the surface is evenly smeared with lubricant ; Assemble the mold, put the sample into the mold, and continue heating at 100°C ...

Embodiment 2

[0030] After straightening the bent sample, turn it 90° in the same direction to grind out the chamfer. Other conditions are the same as in Example 1. The sample is subjected to the second pass of extrusion deformation. The extrusion temperature is 600°C. The room temperature tensile property data measured after pressing is as shown in table 2:

[0031] Table 2 Mechanical properties of (TiB+TiC) / TC18 titanium-based composites extruded at 600°C in the second pass

[0032]

Embodiment 3

[0034] After straightening the bent sample, turn it 90° in the same direction to grind out the chamfer. Other conditions are the same as in Example 1. The sample is subjected to the third extrusion deformation at an extrusion temperature of 600°C. The room temperature tensile performance data measured after pressing is as shown in table 3:

[0035] Table 3 Mechanical properties of (TiB+TiC) / TC18 titanium-based composites extruded at 600℃ for three passes

[0036]

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Abstract

The invention discloses a method for preparing an ultra-fine grain titanium-based composite material by adopting equant bending channel deformation. According to the method, a (TiB+TiC)/TC18 titanium-based composite material is subjected to 600 DEG C-extrusion deformation by designing an extrusion die with 90-degrees corners, and the deformation pass is respectively one pass, two passes and three passes. The titanium-based composite material comprises the following components in percentage by mass: 5% of Al, 5% of Mo, 5% of V, 1% of Cr, 1% of Fe, 0.2% of B4C and 82.8% of Ti, and the molar ratio of generated TiB reinforcement to generated TiC reinforcement is 4: 1. The ultra-fine grain titanium-based composite material prepared by the method has high strength and relatively good plasticity under the condition that the size of the material is not changed, and can be widely applied to the field of aeronautical manufacturing.

Description

technical field [0001] The invention relates to a method for preparing an ultrafine-grained titanium-based composite material used in the field of aviation manufacturing, in particular to a method for preparing an ultrafine-crystalline titanium-based composite material by deformation of an equal-diameter curved channel. Background technique [0002] TC18 titanium alloy is a structural alloy with high strength and toughness, good hardenability and weldability, and has satisfactory elongation, reduction of area and impact toughness [1]. The annealed tensile strength of the alloy is greater than 1080Mpa, which is equivalent to the tensile strength of alloys such as TC4 and TC6 after solution aging, and is better than other titanium alloys. In the state of intensive heat treatment, the strength can be as high as 1280Mpa. The outstanding advantage of the TC18 titanium alloy is that the maximum hardened section thickness is large, up to 250mm, while the hardened section of the Ti...

Claims

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Application Information

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IPC IPC(8): C22F1/18C22C14/00
Inventor 王立强吕维洁林正捷王雪婷覃继宁张荻
Owner SHANGHAI JIAO TONG UNIV
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