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Isothermal superplastic deformation method for micro/nano particulate reinforced titanium matrix composite

A titanium-based composite material and particle-reinforced technology, applied in the field of warm superplastic deformation, can solve the problems of difficult processing and forming, high deformation resistance, etc., and achieve the effect of improving material forming rate, excellent superplastic performance, and meeting high performance requirements

Active Publication Date: 2019-09-27
上海交通大学包头材料研究院 +1
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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 superplastic deformation method of micro / nano particle reinforced titanium-based composite materials, solve the problems of large deformation resistance of particle-reinforced titanium-based composite materials, difficult processing and forming, etc., and provide technical guidance for the near-net shape of the material

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  • Isothermal superplastic deformation method for micro/nano particulate reinforced titanium matrix composite
  • Isothermal superplastic deformation method for micro/nano particulate reinforced titanium matrix composite
  • Isothermal superplastic deformation method for micro/nano particulate reinforced titanium matrix composite

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Embodiment 1

[0032] This embodiment provides a method for superplastic deformation of micro / nano particle reinforced titanium-based composite materials, and the schematic diagram of the process flow is as followsfigure 1 As shown, the specific steps are as follows:

[0033] Preparation of TiB and La by in situ autogenous technique 2 o 3 Micro / Nano Particle Reinforced Titanium Matrix Composites, TiB and La 2 o 3 The volume fractions are 2.5vol.% and 0.1vol.%, respectively. In order to ensure that the composition of the prepared composite material is uniform, the composite material is subjected to vacuum self-consumption melting for three times, and then the head is cut to remove defects such as surface scale and shrinkage cavity. Microstructure photographs of composite materials as figure 2 As shown; the titanium-based composite material is heated to the β single-phase region (1160°C) and held for 60 minutes, and the billet forging is carried out in the β single-phase region (1160°C), a...

Embodiment 2

[0035] This embodiment provides a method for superplastic deformation of micro / nano particle reinforced titanium-based composite materials, the specific steps are as follows:

[0036] Preparation of TiB and La by in situ autogenous technique 2 o 3 Micro / Nano Particle Reinforced Titanium Matrix Composites, TiB and La 2 o 3 The volume fractions are 2.5vol.% and 0.5vol.%, respectively. In order to ensure that the composition of the prepared composite material is uniform, the composite material is subjected to vacuum self-consumption smelting for three times, and then the head is cut to remove defects such as surface oxide skin and shrinkage cavity; The titanium-based composite material was heated to the β single-phase region (1200°C) and held for 50 minutes, and the billet forging was carried out in the β single-phase region (1200°C). 60% to eliminate the original coarse grains, and then machining to remove the scale and defects on the surface of the initial forging billet; th...

Embodiment 3

[0038] This embodiment provides a method for superplastic deformation of micro / nano particle reinforced titanium-based composite materials, the specific steps are as follows:

[0039] Preparation of TiB and Y by in situ self-generation technique 2 o 3 Micro / Nano Particle Reinforced Titanium Matrix Composites, TiB and Y 2 o 3 The volume fractions are 2.5vol.% and 0.5vol.%, respectively. In order to ensure that the composition of the prepared composite material is uniform, the composite material is subjected to vacuum self-consumption smelting for three times, and then the head is cut to remove defects such as surface oxide skin and shrinkage cavity; The titanium-based composite is heated to the β single-phase region (1200°C) and held for 60 minutes, and the billet forging is carried out in the β single-phase region (1200°C). The hydraulic press mold temperature used is always kept at 900-980°C, and the deformation is 60% to eliminate the original coarse grains, and then mach...

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Abstract

The invention discloses an isothermal superplastic deformation method for a micro / nano particulate reinforced titanium matrix composite. The method comprises the following steps of A, preparing a titanium boride and rare earth oxide micro / nano particulate hybrid reinforced titanium matrix composite by utilizing an in-situ synthesis technique, and performing vacuum consumable electrode arc melting on the composite for more than two times; B, performing cogging forging on the composite in a Beta single-phase region, wherein deformation amount is greater than or equal to 50 %; performing isothermal forging on the composite in an (Alpha + Beta) two-phase region to obtain a titanium matrix composite forging blank, wherein deformation amount is greater than or equal to 60 %; and C, performing hot rolling on the titanium matrix composite forging blank in a near Beta phase region, wherein deformation amount is greater than or equal to 80 %, and performing annealing treatment to obtain the micro / nano particulate reinforced titanium matrix composite. The micro / nano particulate reinforced titanium matrix composite is formed by the isothermal forging technology and hot rolling, and thus, the matrix structure can be effectively refined, and the material forming rate is increased; and a plate has good superplasticity within the deformation process range of 800-1000 DEG C and 5 x 10<-3>-10<-4>s<-1>.

Description

technical field [0001] The invention belongs to the field of metal matrix composite materials, and in particular relates to an isothermal superplastic deformation method of micro / nano particle reinforced titanium matrix composite materials. Background technique [0002] With the rapid development of aerospace science and technology, the requirements for specific strength, specific stiffness and heat resistance of structural materials for aerospace vehicles are getting higher and higher. In order to adapt to this development trend, as a high-performance lightweight titanium alloy, it is becoming One of the new structural materials that has received much attention in the field of high-tech new materials. At present, it is believed that traditional titanium alloys have basically reached the limit of performance improvement through the optimization of alloying elements and structure optimization. For further expanding the service temperature range of high-strength and high-modu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/18C22C1/10C22C14/00C22C32/00
CPCC22C1/1036C22C14/00C22C32/0005C22F1/183
Inventor 韩远飞邱培坤吕维洁黄光法毛建伟乐建温
Owner 上海交通大学包头材料研究院
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