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Vacuum hot-rolling method for multi-layer Ti6Al4V-TiBw/Ti6Al4V composite material

A technology of ti6al4v-tibw and composite materials, which is applied in the field of hot rolling for the production of multi-layer titanium-based composite materials, can solve the problems of restricting the development of titanium-based composite materials, uneven layer thickness, and poor interlayer interface bonding. The effect of layered direction enhancement is obvious, the mechanical anisotropy is enhanced, and the strengthening effect is obvious.

Active Publication Date: 2017-12-12
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although these methods can obtain higher reinforcement effects through dislocation packing, they often sacrifice the plasticity and toughness of the material as a price. This phenomenon of strength-toughness inversion has always limited the development of titanium matrix composites.
[0004] However, the technology center for the preparation of layered Ti-TiBw / Ti composites by hot pressing sintering or diffusion bonding (such as the preparation method of layered titanium matrix composites ZL201210138430.0 or the preparation of Ti-TiBw / Ti layered composites by diffusion welding The material method ZL201310498988.4), in which the method of hot pressing sintering can obtain a strong interfacial bonding, but due to the uneven layer thickness and size, the interface has undulations, which is easy to cause the disadvantage of being unable to quantitatively prepare titanium-based composite materials, and the diffusion The connection method can obtain a layered titanium-based composite with uniform layer thickness and straight layers. However, the disadvantage is that the interlayer interface is poorly bonded, which affects the formability and mechanical properties of the titanium-based composite.

Method used

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  • Vacuum hot-rolling method for multi-layer Ti6Al4V-TiBw/Ti6Al4V composite material
  • Vacuum hot-rolling method for multi-layer Ti6Al4V-TiBw/Ti6Al4V composite material
  • Vacuum hot-rolling method for multi-layer Ti6Al4V-TiBw/Ti6Al4V composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1: Take the Ti6Al4V and TiBw / Ti6Al4V composite material foil with a side length of 100 mm and a thickness of 500 μm, and soak it in a hydrofluoric acid solution with a volume fraction of 5% to 10% for about 2 minutes to corrode the surface. The surface of the composite foil is cleaned and dried with a hair dryer;

[0028] 2: Take stainless steel with a side length of 120mm and a thickness of 40mm, mill out a square groove with a side length of 101mm and a depth of 32mm on a milling machine, and open a small hole with a diameter of 3-6mm on one side to lead into the groove. 30 layers of Ti6Al4V and TiBw / Ti6Al4V foils are stacked in the groove in ACAC order;

[0029] 3: Take a stainless steel block with a side length of 101mm and a thickness of 6mm and put it into the upper end of the tank, and hit it with a hammer until the foil is not dragged (that is, the foil is compacted and fixed without misalignment), and the stainless steel block and the edge of the tank are conne...

Embodiment 2

[0038] 1: Take the Ti6Al4V and TiBw / Ti6Al4V composite foils with a side length of 100 mm and a thickness of 400 μm, and use hydrofluoric acid with a volume fraction of 5% to 10% to dissolve and corrode the surface, and surface the titanium alloy and titanium-based composite foils. Rinse well and dry with a hair dryer;

[0039] 2: Take stainless steel with a side length of 120mm and a thickness of 40mm, mill out a square groove with a side length of 101mm and a depth of 32mm on a milling machine, and open a small hole with a diameter of 3-6mm on one side, and mix Ti6Al4V and TiBw / Ti6Al4V foils are stacked in the slot in ACAC order;

[0040] 3: Take a stainless steel block with a side length of 101mm and a thickness of 6mm and put it into the upper end of the tank, hit it with a hammer until the foil is no longer dragged, and seal the stainless steel block and the edge of the tank tightly with arc welding;

[0041] 4: Weld a stainless steel tube with an outer diameter of 8-12m...

Embodiment 3

[0044] 1: Take the Ti6Al4V and TiBw / Ti6Al4V composite foils with a side length of 100 mm and a thickness of 300 μm, and use hydrofluoric acid with a volume fraction of 5% to 10% to dissolve and corrode the surface, and the surface of the titanium alloy and titanium-based composite foils Rinse well and dry with a hair dryer;

[0045] 2: Take stainless steel with a side length of 120mm and a thickness of 40mm, mill out a square groove with a side length of 101mm and a depth of 32mm on a milling machine, and open a small hole with a diameter of 3-6mm on one side, and mix Ti6Al4V and TiBw / Ti6Al4V foils are stacked in the slot in ACAC order;

[0046] 3: Take a stainless steel block with a side length of 101mm and a thickness of 6mm and put it into the upper end of the tank, hit it with a hammer until the foil is no longer dragged, and seal the stainless steel block and the edge of the tank tightly with arc welding;

[0047] 4: Weld a stainless steel tube with an outer diameter of...

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Abstract

The invention provides a vacuum hot-rolling method for a multi-layer Ti6Al4V-TiBw / Ti6Al4V composite material. The vacuum hot-rolling method for the multi-layer Ti6Al4V-TiBw / Ti6Al4V composite material comprises the steps that Ti6Al4V and titanium-based composite material plates are cut, stacked by multiple layers and placed into a stainless steel tank, and the weld sealing procedure and the vacuumizing procedure are conducted; and heating and heat preservation are achieved through the high temperature in a furnace, and the multi-layer Ti6Al4V-TiBw / Ti6Al4V composite material is finally formed through multi-pass hot rolling on a hot-rolling machine. Good interlayer interface bonding and good micron-scale thicknesses are obtained, and strengthening and toughening of laminar titanium-based composite materials are achieved. By adoption of the vacuum hot-rolling method for the multi-layer Ti6Al4V-TiBw / Ti6Al4V composite material, extremely high interface bonding strength can be obtained, and the tensile-shear strength can reach 650 MPa; and through hot-rolling deformation, TiB crystal whiskers can be arranged directionally in the laminar direction, the enhancement effect in the laminar direction is made obvious, and the mechanical anisotropy is enhanced.

Description

technical field [0001] The invention relates to the technical field of production of multilayer titanium-based composite materials, in particular to a hot rolling method for producing multilayer titanium-based composite materials, and belongs to the field of metal rolling. Background technique [0002] The multilayer titanium-based composite material utilizes the toughening method of the layered structure, which can effectively hinder the expansion of cracks and play the role of crack arrest. In 2003, Panda et al prepared TiB / Ti and TiB by powder metallurgy 2 / The Ti functionally graded composite material can weaken residual thermal stress, avoid cracks, and has high impact resistance. Harbin Engineering University Jiang Fengchun and others prepared layered Ti-Al by hot pressing sintering method. 3 Ti composites, which absorb a large amount of impact energy through delamination and fracture in impact experiments, are expected to be used in armored equipment and ballistic s...

Claims

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Application Information

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IPC IPC(8): C22F1/18C22F1/02
CPCC22F1/02C22F1/183
Inventor 刘宝玺刘明阳马久乐殷福星王帅
Owner HEBEI UNIV OF TECH
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