Unlock instant, AI-driven research and patent intelligence for your innovation.

A casting method for improving plasticity and toughness of titanium/aluminum solid-liquid composite interface

A technology of solid-liquid compounding and plastic toughness, which is applied in the field of material processing engineering, can solve the problems of interface reaction layer thickness, unevenness, cracks and holes, etc., and achieve less defects such as cracks and holes, good interface plastic toughness, and bonding strength high effect

Inactive Publication Date: 2016-05-25
UNIV OF SCI & TECH BEIJING
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The content of the present invention is to overcome the deficiencies of the existing technology, and prepare titanium-aluminum composite castings with an improved three-step cooling process, aiming to solve the complex process, poor repeatability, and limited product shape and size in the preparation of titanium-aluminum composite castings in the existing process , the interface reaction layer is thick and uneven, there are many defects such as cracks and holes, and the interface bonding strength is not high, etc.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A casting method for improving plasticity and toughness of titanium/aluminum solid-liquid composite interface
  • A casting method for improving plasticity and toughness of titanium/aluminum solid-liquid composite interface
  • A casting method for improving plasticity and toughness of titanium/aluminum solid-liquid composite interface

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1: aluminum alloy / titanium alloy composite process

[0024] Titanium alloy grade and composition:

[0025] TC4 (Ti-6Al-4V) titanium alloy, its mass fraction: Al5.5-6.75%, V3.5%-4.5%, Fe≤0.30%, C≤0.08%, H≤0.015%, O≤0.20%, N≤0.05%, other elements≤0.10% and total≤0.40%, and the rest is Ti.

[0026] Aluminum alloy grade and composition:

[0027] 7050 aluminum alloy, its mass fraction: containing Zn5.7%-6.7%, Cu2.0%-2.6%, Mg1.9%-2.6%, Zr0.08%-0.15%, Si≤0.12%, Fe≤0.15% , Cr≤0.04%, Mn≤0.10%, Ti≤0.06%, other elements≤0.05% and total≤0.15%, and the rest is Al.

[0028] Specific steps:

[0029] (1) The surface of the 5mm thick TC4 titanium alloy plate obtained by machining is mechanically treated and chemically cleaned to remove oil stains and oxides on the surface. The mechanical treatment is to grind with 400#, 600#, 800#, 1000#, 1500#, 2000# sandpaper in order to obtain the required roughness on the surface of the titanium rod; the chemical cleaning is to use 5...

Embodiment 2

[0034] Embodiment 2: aluminum alloy / titanium alloy composite process

[0035] Titanium alloy grade and composition:

[0036] TC4 (Ti-6Al-4V) titanium alloy, its mass fraction: Al5.5-6.75%, V3.5%-4.5%, Fe≤0.30%, C≤0.08%, H≤0.015%, O≤0.20%, N≤0.05%, other elements≤0.10% and total≤0.40%, and the rest is Ti.

[0037] Aluminum alloy grade and composition:

[0038] 5083 aluminum alloy, its mass fraction: Mg4.0%-4.9%, Zn0.4%-1.5%, Mn0.4%-1.0%, Cr0.05%-0.25%, Zr0.05%-0.25%, Ti≤ 0.15%, Si≤0.40%, Fe≤0.40%, Cu≤0.10%, other elements≤0.10% and total≤0.40%, and the rest is Al.

[0039] Specific steps:

[0040] (1) The surface of the 5mm thick TC4 titanium alloy plate obtained by machining is mechanically treated and chemically cleaned to remove oil stains and oxides on the surface. The mechanical treatment is to grind with 400#, 600#, 800#, 1000#, 1500#, 2000# sandpaper in order to obtain the required roughness on the surface of the titanium rod; the chemical cleaning is to use 5% NaOH...

Embodiment 3

[0045] Embodiment 3: aluminum alloy / titanium alloy composite process

[0046] Titanium alloy grade and composition:

[0047] TC4 (Ti-6Al-4V) titanium alloy, its mass fraction: Al5.5-6.75%, V3.5%-4.5%, Fe≤0.30%, C≤0.08%, H≤0.015%, O≤0.20%, N≤0.05%, other elements≤0.10% and total≤0.40%, and the rest is Ti.

[0048] Aluminum alloy grade and composition:

[0049] 6061 aluminum alloy, its mass fraction: Mg0.8%-1.2%, Si0.4%-0.8%, Cu0.15%-0.4%, Cr0.04%-0.35%, Fe≤0.7%, Mn≤0.15%, Zn≤0.25%, Ti≤0.15%, other elements≤0.10% and total≤0.40%, and the rest is Al.

[0050] Specific steps:

[0051] (1) The surface of the 5mm thick TC4 titanium alloy plate obtained by machining is mechanically treated and chemically cleaned to remove oil stains and oxides on the surface. The mechanical treatment is to grind with 400#, 600#, 800#, 1000#, 1500#, 2000# sandpaper in order to obtain the required roughness on the surface of the titanium rod; the chemical cleaning is to use 5% NaOH solution, deion...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
shear strengthaaaaaaaaaa
shear strengthaaaaaaaaaa
tensile strengthaaaaaaaaaa
Login to View More

Abstract

A casting method for improving plasticity and toughness of titanium / aluminum solid-liquid composite interfaces belongs to the field of material machining engineering. The method comprises the steps of (1) machining titanium alloy into a required material style; (2) subjecting the surface of the prefabricated titanium alloy to chemical cleaning to remove oil dirt and oxides on the surface; (3) smelting aluminum alloy till being fully molten; (4) immersing the titanium alloy inside the molten aluminum alloy at a temperature of 750-860 DEG C and performing heat preservation for 10-240 seconds; (5) cooling the furnace to 710-790 DEC and continuing to perform heat preservation for 5 minutes to 4 hours, then adjusting the temperature to 670-750 DEGC and performing heat preservation for 5 minutes to 3 hours, and lastly performing air cooling or oil quenching until room temperature. Titanium and aluminum composite materials prepared through method can give full play to the advantages of the titanium alloy of being high in specific stiffness and specific strength, corrosion-resistant, anti-fatigue, anti-creep, excellent in high-temperature mechanical properties and the like, and meanwhile make up the deficiencies of being poor in thermal conductivity, signal interference resistant, shear resisting performance and the like.

Description

technical field [0001] The invention relates to a casting method for improving the plastic toughness of titanium / aluminum solid-liquid composite interface, which belongs to the field of material processing engineering. Background technique [0002] Titanium / aluminum bimetallic composite materials can combine the advantages of titanium alloys such as corrosion resistance, high temperature resistance, and high impact toughness with the advantages of aluminum alloys such as low specific gravity and high thermal conductivity, and can reduce the amount of titanium alloys and use costs. Titanium / aluminum bimetallic composite materials have comprehensive properties that titanium and aluminum single materials do not have, so they have become new materials that are being developed in the fields of aviation, aerospace, petroleum, chemical industry, and national defense. [0003] The casting composite method is used to prepare titanium / aluminum layered composite materials. The process ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B22D19/02B22D30/00B22D27/00
CPCB22D23/04
Inventor 李宏祥聂新宇赵康宁张济山庄林忠
Owner UNIV OF SCI & TECH BEIJING