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Preparation method for fine Al3Ti particles-dispersed aluminum-base intermediate alloy

A kind of intermediate alloy and fine technology, applied in the field of powder metallurgy, can solve the problems of reducing the effect of modification, coarse intermediate phase, segregation, etc., and achieve the effect of improving dispersion, low oxygen content, and uniform dispersion

Active Publication Date: 2014-05-28
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Al-Ti master alloys are cheap, convenient to store and transport, and easy to use; but in general commercial aluminum-titanium master alloys, Al 3 The size of the Ti phase is relatively large, reaching tens or even more than 100 microns. It sinks due to gravity in the alloy liquid, and it is easy to cause segregation during the standing process. At the same time, due to the coarse intermediate phase, the modification response time is long and the modification effect is reduced; In order to solve Al 3 Ti phase size is coarse and many other problems, the present invention has improved a kind of aluminum-titanium master alloy preparation method, the obtained Al 3 Ti phase particles are dispersed in the aluminum matrix, suitable as Al 3 Preparation of Ti Phase Dispersion Strengthened Aluminum Alloy

Method used

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  • Preparation method for fine Al3Ti particles-dispersed aluminum-base intermediate alloy
  • Preparation method for fine Al3Ti particles-dispersed aluminum-base intermediate alloy
  • Preparation method for fine Al3Ti particles-dispersed aluminum-base intermediate alloy

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Embodiment 1

[0030] Embodiment one: The aluminum powder with a particle size of less than 300 mesh produced by Changsha Tianjiu Metal Material Co., Ltd. and the nano-titanium powder with an average particle size of 800nm ​​produced by Shanghai Chaowei Nano Technology Co., Ltd. were used to weigh the two powders with a mass ratio of 9:1. Like this, when 2g of nano-titanium powder is carried out the surface coating of polyoxyethylene 20 sorbitan monooleate and connection, earlier be made into suspension with acetone and nano-titanium powder, the volume fraction of nano-titanium powder is 1vol of acetone %, add the polyoxyethylene 20 sorbitan monooleate of 1.0vol% of the volume of acetone, utilize formic acid and ammoniacal liquor to adjust the pH value of the suspension to 6, then carry out 30min ultrasonic treatment to make polyoxyethylene 20 sorbitol Anhydride monooleate was coated on the surface of nano-titanium powder; then, 18g of aluminum powder was added to nano-titanium powder suspe...

Embodiment 2

[0031] Embodiment two:The aluminum powder with a particle size of less than 300 mesh produced by Changsha Tianjiu Metal Material Co., Ltd. and the nano-titanium powder with an average particle size of 800nm ​​produced by Shanghai Chaowei Nano Technology Co., Ltd. were used to weigh the two powders with a mass ratio of 9:1. Like this, when 2g nano-titanium powder is carried out the surface coating of polyoxyethylene 20 sorbitan monooleate and connection, earlier be made into suspension with acetone and nano-titanium powder, the volume fraction of nano-titanium powder is 2vol of acetone %, add polyoxyethylene 20 sorbitan monooleate of acetone volume 1.0vol%, utilize formic acid and ammonia water to adjust the pH value of the suspension to 7, then carry out 30min ultrasonic treatment to make polyoxyethylene 20 sorbitan monooleate Oleate was coated on the surface of nano-titanium powder; then, 18g of aluminum powder was added to the suspension of nano-titanium powder to prepare A...

Embodiment 3

[0032] Embodiment three: The aluminum powder with a particle size of less than 300 mesh produced by Changsha Tianjiu Metal Material Co., Ltd. and the nano-titanium powder with an average particle size of 800nm ​​produced by Shanghai Chaowei Nano Technology Co., Ltd. were used to weigh the two powders with a mass ratio of 8:2. Like this, when 4g of nano-titanium powder is carried out the surface coating of polyoxyethylene 20 sorbitan monooleate and connection, earlier be made into suspension with acetone and nano-titanium powder, the volume fraction of nano-titanium powder is 3vol of acetone %, add polyoxyethylene 20 sorbitan monooleate of acetone volume 1.0vol%, utilize formic acid and ammonia water to adjust the pH value of the suspension to 8, then carry out 30min ultrasonic treatment to make polyoxyethylene 20 sorbitan monooleate Oleate is coated on the surface of nano-titanium powder; then, 16g of aluminum powder is added to nano-titanium powder suspension to prepare Al-2...

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Abstract

The invention relates to an Al-Ti intermediate alloy, in particular to a preparation method for a fine Al3Ti particles-dispersed aluminum-base intermediate alloy, and belongs to the field of powder metallurgy. The dispersibility of the nanometer powder is improved by surface modification; meanwhile, a surfactant has a protective effect on nanometer titanium powder particles; the nanometer titanium powder can be further dispersed by wet ball milling; aluminum powder and titanium powder are mixed more evenly; in addition to aluminum matrix, an Al3Ti phase-dispersed aluminum-titanium intermediate alloy is obtained after sintering. The mixed powder obtained by the preparation method has the advantages of low oxygen content, even dispersion and less agglomeration; the fine Al3Ti phase obtained by the sintering is dispersed in the aluminum matrix; the preparation method is suitable for preparing Al3Ti phase-dispersed reinforced aluminum alloy.

Description

technical field [0001] The invention relates to an Al-Ti master alloy, in particular to a 3 The invention discloses a method for preparing Ti particle fine dispersed aluminum base master alloy, which belongs to the field of powder metallurgy. Background technique [0002] With the wide application and rapid development of aluminum and aluminum alloy materials, especially in the application of high-tech fields, strict requirements are put forward for the structure of aluminum ingots and their subsequent processing; fine and uniform equiaxed crystals are the best In order to obtain this structure, the grains must be refined by different means, that is, the micronization of the crystal structure, including adding various master alloy refiners in the liquid state or by means of external energy (such as mechanical vibration, electromagnetic Stirring, convection, ultrasonic treatment, etc.) to refine the a (A1) matrix; thereby significantly improving the mechanical properties and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/04C22C1/03
Inventor 王建华伍波李广宇苏旭平涂浩刘亚
Owner CHANGZHOU UNIV