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Aluminum-iron alloy preparing technology

A preparation process, a technology of aluminum-iron alloy, applied in the field of aluminum-iron alloy smelting process, can solve the problems of increasing the difficulty of production, unevenness, more internal air, etc., to achieve improved stability and yield, uniform particle shape and particle size , easy to evenly distribute the effect

Active Publication Date: 2020-08-11
JIANGSU HUAQI ALUMINUM SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the molten metal is gradually decreasing, and the control of heating equipment and stirring equipment needs to be constantly adjusted, which increases the difficulty of production and increases the loss of equipment
[0007] In addition, if the gas atomization equipment used in powder metallurgy uses metal powder atomization equipment dedicated to powder metallurgy or 3D printing, the air flow rate is high, the equipment is precise, and the production cost is high, which is not necessary for raw material manufacturers. Be applicable
Therefore, the atomization equipment used usually only blows away the metal droplets, but the metal powder particles have many large particles, which are very uneven, which is very unfavorable for subsequent melting and pressing into blocks or other shapes.
There is a lot of air inside, it is not easy to discharge, and oxidation may occur when heated
The melting time and pressure required are also longer, and the cost is higher

Method used

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  • Aluminum-iron alloy preparing technology
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Examples

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Effect test

Embodiment 1

[0049] A process for preparing an aluminum-iron alloy, comprising the following steps,

[0050] 1) Aluminum rod preparation

[0051] Calculate the amount of aluminum required for a single powder metallurgy, use 50-100% of all aluminum components, melt it and cast it into a cylindrical shape with a coaxial through hole inside, the diameter of the coaxial through hole is 0.5-1.5mm;

[0052] The cylindrical aluminum rod is for the convenience of uniform melting, and the uniform size is the premise to ensure the uniform composition of the subsequent metal powder. The through holes are for subsequent ventilation.

[0053] 2) Small component smelting

[0054] Melt the components in the alloy other than aluminum and the remaining aluminum that has not been made into an aluminum rod in step 1) in a crucible, at a temperature 10-50 degrees higher than the melting point, and electromagnetically stir for 10-20 minutes;

[0055] When smelting small components, it is best to add each co...

Embodiment 2

[0073] The melting point of aluminum is much lower than the melting point of iron or aluminum-iron alloy. In order to melt the alloy rod quickly, the alloy rod is preheated first, and the preheating temperature is lower than the melting point of aluminum. Then, the alloy layer and the inner aluminum rod are quickly melted together by rapid heating. Avoid using a single heating device for heating, and the heating time is long, which will cause the inner aluminum rod to melt first, and the outer alloy layer to melt later. After preheating, the inner and outer layers can be melted together quickly to make the components more uniform.

[0074] Therefore, in the step 4) the first induction heating ring 30 is fixed at the bottom of the transport box 10, and when the alloy rod 20 advances into the first induction heating exchange 30, the alloy rod 20 is preheated to 600 degrees, and passed through the sealing plate into the collection tank 50.

Embodiment 3

[0076] In order to further reduce the difference between the melting points of the inner and outer layers, in step 1), when the proportion of iron components exceeds 35%, 30-60% of all iron components are smelted together with aluminum; at the same time, in step 2) the small group For the smelting of small fractions, all remaining iron components are used, and aluminum accounts for 11-24% in small fractional smelting. In this way, the internal and external melting points tend to be more consistent, and the components of the molten metal droplets are more uniform, faster and controllable.

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Abstract

The invention discloses an aluminum-iron alloy preparing technology. A part of aluminum which is the main component or a part of two main components including aluminum and iron are made into an aluminum bar, and small components and the rest of aluminum or the aluminum and iron are mixed to be poured into an alloy bar with the prepared aluminum bar. High-frequency induction heating is utilized, and liquid drops are formed at the bottom end of the alloy bar. An axial through hole is formed in the aluminum bar, and air is blown into the liquid drops or blown to the liquid drops while the liquiddrops are formed. The air blowing position is located in a vacuum collecting tank, gas can be expanded in the vacuum environment, the liquid drops are exploded, and uniform metal powder particles areformed. Finally, the basically-uniform alloy powder particles of the components are utilized for secondary smelting. Secondary smelting is conducted, since the components are basically uniform, stirring is more sufficient, the yield is high, and the quality is stable. Controllability of each link is higher, parameters or components are adjusted in time, and equipment adaption is faster. High-quality product production is better facilitated.

Description

technical field [0001] The invention relates to a smelting process of an aluminum-iron alloy, in particular to a process for forming an aluminum-iron alloy by smelting powder metallurgy in stages. Background technique [0002] In the first part, during powder metallurgy, after melting large and small components of metal in the same container, stir to make the components mix as evenly as possible and avoid the occurrence of obvious segregation. [0003] The second part, the specific process of powder metallurgy is to melt and stir, and then make the molten metal into metal powder, and then melt and press the powder into the required metal block or other shapes. [0004] However, in the process of realizing the technical solution of the invention in the embodiment of the present application, the inventor of the present application found that the above-mentioned technology has at least the following technical problems: [0005] There are many small component metals in the allo...

Claims

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Application Information

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IPC IPC(8): B22F9/08B22D19/16C22C1/03C22C21/00
CPCB22F9/082B22D19/16C22C1/026C22C1/03C22C21/00B22F2009/0836B22F2009/0844
Inventor 谢石华
Owner JIANGSU HUAQI ALUMINUM SCI & TECH
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