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Preparation method and device of additive method rapidly-set fully equiaxed crystal aluminum alloy cast ingot

An aluminum alloy ingot, equiaxed crystal technology, applied in the field of metallurgy, can solve the problems of difficulty in preparing segregation-free ingots, unavoidable local segregation, and high energy consumption

Inactive Publication Date: 2018-11-13
昆山晶微新材料研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the defect that the prior art equipment and process are relatively complicated, energy consumption is high, local segregation is difficult to avoid, and it is difficult to prepare a complete macro-to-micro segregation-free ingot, a material-adding method is proposed to rapidly solidify fully equiaxed crystal aluminum The preparation method and device of the alloy ingot, by changing the atomization spraying to the liquid injection process, improves the density of the alloy ingot, reduces its oxidation, and improves the production efficiency of the ingot at the same time, and can quickly prepare finer and more uniform Aluminum and its alloy ingots with fully equiaxed grain structure and complete elimination of macro segregation

Method used

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  • Preparation method and device of additive method rapidly-set fully equiaxed crystal aluminum alloy cast ingot
  • Preparation method and device of additive method rapidly-set fully equiaxed crystal aluminum alloy cast ingot
  • Preparation method and device of additive method rapidly-set fully equiaxed crystal aluminum alloy cast ingot

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Embodiment 1

[0026] Such as figure 1 and figure 2 As shown, the device for preparing an ingot of a fully equiaxed crystal aluminum alloy rapidly solidified by the additive method involved in this embodiment includes: a crucible 1, a heater 2, a heat preservation cover 3, a filter device 4, a nozzle 5, a nozzle baffle 6, and a nozzle heating Device 7, vacuum chamber 8, dummy device 9, two-dimensional mobile platform 10, motor 11, air inlet 12, exhaust hole 13, vacuum pump 14, connecting rod 15, sleeve 16, cooling medium 17, moving ingot 18.

[0027] In this embodiment, the above-mentioned device is used, and the molten pure aluminum is poured into the crucible, and the crucible is left there for 1 hour, and the temperature is adjusted to 715°C. Vacuumize the vacuum chamber and fill it with an appropriate amount of argon, so that the air pressure in the vacuum chamber is 0.5 atmospheres, and preheat the nozzle to a temperature of 720°C; set the spray distance to 18cm, and the vertical dist...

Embodiment 2

[0030] In this embodiment, the above-mentioned device is used to pour the aluminum-silicon alloy melt with a silicon content of 3% w.t. into the crucible, stay there for 1 hour, and adjust the temperature to 680°C. Vacuumize the vacuum chamber and fill it with an appropriate amount of argon, so that the air pressure in the vacuum chamber is 0.6 atmospheres, and preheat the nozzle to a temperature of 700°C; set the spraying distance to 15cm, and move the contact surface and cooling surface of the ingot The vertical distance is 2.5cm, the moving speed of the two-dimensional mobile platform is 3.5mm / s, and the pass interval is 0.8mm. The moving method is as follows: image 3 . The total displacement of the two-dimensional mobile platform in three directions is set as X=120mm, Y=20mm, Z=80mm respectively. Lift the nozzle baffle, the aluminum liquid in the heat preservation crucible is ejected from the nozzle under the action of the air pressure difference, and at the same time st...

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Abstract

The invention provides a preparation method and device of an additive method rapidly-set fully equiaxed crystal aluminum alloy cast ingot. The device comprises a metal heating mechanism and a negativepressure cooling mechanism. The metal heating mechanism is located above the negative pressure cooling mechanism and connected with the negative pressure cooling mechanism through a nozzle. The negative pressure cooling mechanism comprises a vacuum chamber with an air inlet and an exhaust hole, and a three-dimensional moving ingot mechanism arranged in the vacuum chamber. The three-dimensional moving ingot mechanism comprises a moving ingot and a two-dimensional moving platform vertically connected with the moving ingot. A water cooling mechanism is arranged outside the moving ingot, and themoving ingot is driven by a precision motor to precisely move up and down. By means of the technological means of changing atomized spraying into liquid-state injection, the density of the alloy ingotis improved, oxidization of the alloy ingot is relieved, meanwhile, the production efficiency of the cast ingot is improved, and aluminum and the alloy cast ingot thereof with a fully equiaxed crystal structure and without macro-element segregation can be rapidly prepared.

Description

technical field [0001] The invention relates to a technology in the field of metallurgy, in particular to a novel preparation method for a large-size non-segregation equiaxed metal ingot. Background technique [0002] Casting pure aluminum ingots or aluminum alloy ingots by conventional casting methods is difficult to obtain all equiaxed grain structures due to the sequence of solidification. There will always be a certain proportion of columnar grains in the alloy structure, which is not conducive to obtaining higher alloy properties through the subsequent deformation process. In addition, for large metal ingots, due to the segregation of the main alloying elements on the liquid-solid interface, large macroscopic element segregation is prone to occur from the edge to the center, which seriously affects the quality of the ingot. It is extremely difficult to prepare ingots with fully equiaxed crystals and no macro-element segregation by using traditional techniques. The spr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D23/00
Inventor 张佼孙宝德东青
Owner 昆山晶微新材料研究院有限公司
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