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Ceramic casting mold applied to metal casting under electric field treatment and method for casting titanium aluminum-based alloy by using same

A ceramic casting mold and base alloy technology, which is applied in the field of casting titanium-aluminum base alloys, can solve the problems of difficulty in controlling the orientation of solid-phase precipitation sheets, uneven current density distribution, and small effective area of ​​electric field, etc., to achieve crystal grain The effect of tissue refinement, uniform current density distribution, and enlarged effective area

Inactive Publication Date: 2012-07-04
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the current electrode connection method in the cast metal mold under electric field treatment has small effective area of ​​electric field, uneven current density distribution, electrode contamination of molten metal, and the existing directional solidification of titanium-aluminum base metals. In the process of alloying, there are problems that the columnar crystal structure is coarse, and the orientation of the solid-phase precipitation sheet is difficult to be well controlled. The invention provides a ceramic mold for casting metal under electric field treatment and a method for casting titanium-aluminum-based alloy using it

Method used

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  • Ceramic casting mold applied to metal casting under electric field treatment and method for casting titanium aluminum-based alloy by using same
  • Ceramic casting mold applied to metal casting under electric field treatment and method for casting titanium aluminum-based alloy by using same
  • Ceramic casting mold applied to metal casting under electric field treatment and method for casting titanium aluminum-based alloy by using same

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specific Embodiment approach 1

[0021] Specific implementation mode 1: This implementation mode is combined with the description attached figure 1 The ceramic casting mold for casting metal under electric field treatment is described, and the ceramic casting mold for casting metal under electric field treatment is respectively provided with the side shape of the cavity 1 on the two opposite sides of the ceramic casting mold cavity 1. Homogeneous composite electrode 2, the two homogeneous composite electrodes 2 set are composed of copper plate 2-1, alloy plate 2-2 and copper terminal 2-3, wherein the copper terminal 2-3 is set on the copper plate 2- 1, the other side of the red copper plate 2-1 is welded with the alloy plate 2-2, and one of the homogeneous composite electrodes 2 is provided with a sprue 2-4, and the sprue 2-4 is connected to the sprue Communication; one side of the copper plate 2-1 where the copper terminal 2-3 is set is connected to the side of the mold cavity 1, and the copper terminal 2-3 ...

specific Embodiment approach 2

[0023] Embodiment 2: This embodiment differs from Embodiment 1 in that the alloy plate 2-2 is a metal material plate such as a titanium alloy plate, a titanium-aluminum alloy plate, an aluminum alloy, or a cast iron plate. Other parameters are the same as in the first embodiment.

[0024] In this embodiment, the specific type of the alloy plate 2-2 depends on the type of metal cast in the ceramic mold, that is, the specific type of the alloy plate 2-2 is the same as the metal type cast in the ceramic mold.

specific Embodiment approach 3

[0025] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the red copper terminal 2-3 is arranged on one side of the red copper plate 2-1, and the homogeneous composite electrode 2 with the gate 2-4 is arranged therein. The red copper terminal 2-3 is arranged below the pouring port 2-4 on the red copper plate 2-1. Other parameters are the same as those in Embodiment 1 or Embodiment 2.

[0026] The front view of the homogeneous composite electrode 2 provided with the sprue 2-4 in this embodiment is as follows figure 2 As shown, the right view is as image 3 shown.

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Abstract

The invention discloses a ceramic casting mold applied to metal casting under electric field treatment and a method for casting titanium aluminum-based alloy by using the same. The invention relates to a ceramic casting mold and a method for casting alloy by using the same, and solves the problems of a small electric field service area, current density maldistribution and molten metal polluted byelectrodes in the electrode connection method of the prior metal casting method under electric field treatment, and gross column crystal tissues and uncontrolled orientation of a solid phase precipitation layer in the directional solidified titanium aluminum-based alloy. Two homogenous composite electrodes which respectively consist of a copper sheet, an alloy sheet and a copper binding post and have the same shape with the side of a casting mold cavity are arranged on the opposite sides of the ceramic casting mold cavity. The casting method comprises the following steps of: placing the ceramic casting mold into a vacuum induction melting furnace, and connecting the binding posts with the positive and negative poles; weighing raw alloy material, and starting the melting furnace after vacuum pumping to obtain molten mass; and injecting the molten mass into the ceramic casting mold, and cooling down after electric field treatment. The homogenous composite electrodes have the advantages of enlarged service area of the electric field, uniform distribution of current density and obvious grain refinement effects for the titanium aluminum-based alloy.

Description

technical field [0001] The invention relates to a ceramic mold for casting metal and a method for casting titanium-aluminum base alloy with it. Background technique [0002] In the field of materials engineering, controlling the solidification process of alloys has become an important way to improve the performance of traditional castings and develop new casting materials. With the improvement of casting performance requirements in modern science and technology and application fields, new requirements and challenges are put forward for traditional casting methods. How to create various external conditions, such as pressure, temperature gradient, microgravity, ultrasonic, magnetic field, electric field, etc. to improve the solidification structure of the casting, the composition phase distribution, and eliminate casting defects such as solute segregation, shrinkage porosity, gas and inclusions, Excavating the performance potential of castings, making castings obtain excellen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D27/02B22D21/04
Inventor 丁宏升张永姜三勇陈瑞润郭景杰傅恒志
Owner HARBIN INST OF TECH
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