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A method for refining industrial pure aluminum with aluminum-titanium master alloy

A master alloy and industrial pure aluminum technology, which is applied in the field of refining industrial pure aluminum with aluminum-titanium master alloy, can solve the problem of high production cost of modifier

Active Publication Date: 2016-04-13
CHANGZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to improve the modification effect of aluminum-titanium master alloy on pure aluminum, the patent CN102994788A "A method for refining pure aluminum with Al-5%Ti master alloy" adopts equal channel deformation to prepare fine block Al 3 Al-5%Ti master alloy of Ti phase, after modification treatment of pure aluminum, the grain size of pure aluminum can be refined to 200 In the following, better comprehensive physical and mechanical properties have been obtained; however, the patent has undergone multi-pass deformation treatment of the aluminum-titanium master alloy, and the production cost of the modifier is too high, and because Al in the extruded aluminum-titanium master alloy 3 The Ti phase is still relatively coarse, so there is still a lot of room for improvement in the modification of industrial pure aluminum

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  • A method for refining industrial pure aluminum with aluminum-titanium master alloy
  • A method for refining industrial pure aluminum with aluminum-titanium master alloy

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Effect test

Embodiment 1

[0019] 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. Prepare Al-Ti mixed powder; ball mill in XQM-1 planetary ball mill at a speed of 150r / min for 2.5h, and then press the powder on a tablet machine to form a tablet with a pressure of 11MPa, the diameter of the tablet is 8mm, and the thickness is 2mm , and then put the pressed sample into the corundum crucible, and seal it in the quartz tube with a self-assembled vacuum unit. The vacuum degree in the quartz tube is less than 0.1 Pa. Sintering for 10 hours; put industrial pure aluminum and refining agent into graphite crucible at 690 Heating in a pit-type furnace until melting, keeping it warm for 15 minutes, adding the prepared aluminum-titanium master alloy to the molten ...

Embodiment 2

[0022] 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. Prepare Al-Ti mixed powder; ball mill in XQM-1 planetary ball mill at a speed of 150r / min for 2.5h, and then press the powder on a tablet machine to form a tablet with a pressure of 11MPa, the diameter of the tablet is 8mm, and the thickness is 2mm , and then put the pressed sample into the corundum crucible, and seal it in the quartz tube with a self-assembled vacuum unit. The vacuum degree in the quartz tube is less than 0.1 Pa. Sintering for 10 hours; put industrial pure aluminum and refining agent into graphite crucible at 700 Heating in a well-type furnace until melting, and keeping it warm for 12 minutes; adding the prepared aluminum-titanium master alloy to the mo...

Embodiment 3

[0025]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. Prepare Al-Ti mixed powder; ball mill in XQM-1 planetary ball mill at a speed of 150r / min for 2.5h, and then press the powder on a tablet machine to form a tablet with a pressure of 11MPa, the diameter of the tablet is 8mm, and the thickness is 2mm , and then put the pressed sample into the corundum crucible, and seal it in the quartz tube with a self-assembled vacuum unit. The vacuum degree in the quartz tube is less than 0.1 Pa. Under sintering for 10h, put industrial pure aluminum and refining agent into graphite crucible at 710 Heating in a pit-type furnace until melting, keeping it warm for 10 minutes, adding the prepared aluminum-titanium master alloy to the molten ...

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Abstract

The invention belongs to the field of preparation of metal materials, and particularly relates to a method for refining commercially pure aluminum with an aluminum-titanium interalloy. The principles of the method are as follows: uniformly mixed aluminum-titanium mixed powder is sintered at certain temperature to prepare an Al-10 wt.% Ti interalloy in which the particle size of the Al3Ti phase is 2-6, and the aluminum-titanium interalloy is added into commercial molten aluminum; and since the dispersed fine granular Al3Ti provides more effective nucleation cores, the addition amount of the modifier is reduced, the deterioration response time is shortened, the crystal nucleation ratio is effectively enhanced, and the deterioration temperature can be lowered, thereby further achieving the goal of refining the grain size of the commercially pure aluminum.

Description

technical field [0001] The invention belongs to the field of metal material preparation, and in particular relates to a method for refining industrial pure aluminum with an aluminum-titanium master alloy. Background technique [0002] Aluminum and aluminum alloys are important materials widely used in modern industry, and further improving their comprehensive properties has always been one of the key research contents of materials scientists; aluminum alloys are light in weight, high in specific strength, corrosion resistant, good in electrical and thermal conductivity, and easy to process It is widely used in the fields of machinery, aerospace, construction, electrical electronics and automobiles, especially in the high-tech field, which also puts forward strict requirements on the organization of aluminum ingots and aluminum billets in the subsequent deep processing process, while One of the keys to controlling its microstructure and properties is to cast the best as-cast ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/03C22C21/00
Inventor 王建华伍波李广宇苏旭平涂浩刘亚
Owner CHANGZHOU UNIV
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