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Device and method for rotatably casting metal ingots

A technology of metal ingot casting and rotary casting, which is applied in the control of molten metal pouring from ladles, metal processing equipment, and equipment for transporting molds, etc. It can solve the problems of easy oxidation and separation of interfaces, quality problems of steel ingots, and pores problem, to achieve the effect of increasing the nucleation rate, reducing the liquid shrinkage, and increasing the degree of supercooling

Active Publication Date: 2021-04-27
UNIV OF SCI & TECH LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patent document CN101927336 discloses a method for composite casting extra-thick slabs using continuous casting slabs as mold cavities. During this period, molten steel is solidified and composited. The obvious disadvantage of this method is that the interface between the slab and the solidified structure is easily oxidized and separated, resulting in composite failure.
However, in the actual casting composite process, pores usually appear in the solid-liquid interface between the cold core and the molten steel, causing internal quality problems of the steel ingot

Method used

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  • Device and method for rotatably casting metal ingots
  • Device and method for rotatably casting metal ingots

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Experimental program
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Effect test

Embodiment 1

[0030] A device for rotary casting metal ingots, comprising a vacuum protective atmosphere system, a rotary displacement system located inside the vacuum protective atmosphere system, and a casting system located above the vacuum protective atmosphere system;

[0031]The vacuum protective atmosphere system includes a vacuum atmosphere tank body 2, a top cover 9, an air inlet pipe 4, an exhaust pipe 16, a sealing valve plate 11, and a vacuum pumping device and an inert gas supply device positioned outside the vacuum atmosphere tank body; The vacuum atmosphere tank body is welded by steel plates. A top cover is arranged on the top of the vacuum atmosphere tank body. The top cover is provided with a pouring orifice. The sealing valve plate is arranged on the top of the pouring orifice. The top cover and the vacuum atmosphere tank Sealing and fixing methods are adopted between the bodies, such as sealing bolt locking or sealing buckle locking. This embodiment adopts the method of s...

Embodiment 2

[0035] A method for rotary casting metal ingots, using the device of embodiment 1, comprising the steps of:

[0036] a. Evacuate the air in the vacuum atmosphere tank: put the rotary displacement system and the ingot mold into the vacuum atmosphere tank 2, place the ingot mold directly below the pouring orifice, and put the top cover on the vacuum atmosphere tank 2 9. Lock the top cover 9 with the sealing bolt 8, close the exhaust pipe 16, close the sealing valve plate 11; open the air intake pipe 4, open the vacuum pumping device, and vacuumize the vacuum atmosphere tank 2, when the vacuum After the gas in the atmosphere tank 2 is emptied, fill the inert gas into the vacuum atmosphere tank 2 through the inert gas supply device until the pressure in the vacuum atmosphere tank 2 is greater than the external atmospheric pressure, and stop feeding the vacuum atmosphere tank 2. Fill with inert gas.

[0037] b. Hanging the tundish: hang the tundish 12 on the casting platform 10, a...

Embodiment 3

[0045] This embodiment relates to a method for preparing a metal ingot by rotary casting using the device in Embodiment 1. Taking the preparation of a large 16Mn steel ingot with a weight of 85 tons as an example, the specific steps are as follows:

[0046] a. If Figure 1-Figure 2 As shown, first assemble the equipment: place the base plate 19 at the bottom of the vacuum atmosphere tank body 2, then install the traverse track 20 on the base plate 19, and then install the traverse trolley 18, the traverse motor 1 and the traverse transmission mechanism 21, Place the rotating chassis 5 and its transmission mechanism and supporting device on the traversing trolley 18, place the mold bottom 6 and the mold body 7 on the rotating chassis 5, cover the top cover 9 on the vacuum atmosphere tank body 2, and use the sealing bolt 8 Lock it, then move the bottom of the casting platform 10, align the casting opening of the top cover 9 with the casting opening above the casting platform 10,...

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Abstract

The invention provides a device and method for rotatably casting metal ingots in order to solve the problems of existing large ingot casting technologies, and belongs to the technical field of metal casting. The device comprises a vacuum protective atmosphere system, a rotary displacement system located in the vacuum protective atmosphere system and a casting system located above the vacuum protective atmosphere system. The method comprises the following steps of 1) emptying air in a vacuum atmosphere tank body; (2) hoisting a tundish; 3) starting a rotary displacement system; 4) taking out the ingots. According to the device, fine-grain homogeneous compact circular or polygonal metal ingots are obtained in a common die casting mode. The method is simple in process, uniform in ingot internal quality, high in ingot comprehensive yield and low in production cost.

Description

technical field [0001] The invention belongs to the technical field of metal casting, and in particular relates to a device and method for rotary casting metal ingots. Background technique [0002] At present, die casting is still the main production method for large metal ingots. The common die casting method is to pour the pre-smelted metal melt into the ingot mold to cool and solidify. However, as the three-dimensional size of the ingot increases, the solidification speed of the metal melt in the ingot mold slows down rapidly, especially for some metals with poor thermal conductivity (such as alloy steel, titanium and its alloy ingots, etc.) . As a result, a series of quality problems have been brought about, such as intensified segregation, developed columnar crystals, coarse core structure, loose core, increased shrinkage cavity, and increased non-metallic inclusions, resulting in a significant decline in the quality of the ingot. [0003] In order to improve the qua...

Claims

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Application Information

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IPC IPC(8): B22D7/00B22D7/12B22D33/02B22D7/06B22D27/15B22D37/00B22D2/00
CPCB22D7/00B22D7/12B22D33/02B22D7/06B22D27/15B22D37/00B22D2/00
Inventor 井玉安臧喜民李万明王志英赵广迪孔令种于伟达艾青
Owner UNIV OF SCI & TECH LIAONING
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