Coupling Vibration Casting Method for Improving the Surface Quality of Continuous Casting Ingots

A technology of coupling vibration and surface quality, applied in the field of metal casting

Active Publication Date: 2021-09-10
JIANGXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to eliminate such casting defects, various methods have been adopted in the prior art, including the "pull-stop-reverse push" casting method to enhance the casting cooling strength, etc., but these methods are not suitable for ingots with high composition and large solidification range However, it is still not enough to solve the existing practical problems

Method used

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  • Coupling Vibration Casting Method for Improving the Surface Quality of Continuous Casting Ingots
  • Coupling Vibration Casting Method for Improving the Surface Quality of Continuous Casting Ingots

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] In Example 1, the above-mentioned coupled vibration casting method for improving the surface quality of the continuous casting ingot was used to cast 70Cu+As copper tubes.

[0036] The 70Cu+As alloy pipe has good anti-Zn removal performance due to the addition of As, so it is widely used in bathrooms, decorations, etc. Thermoplasticity causes hot embrittlement, which makes alloy pipes prone to cracks in the vertical and casting direction during horizontal continuous casting.

[0037] Ingot composition: 30% Zn, 0.05% As, and the balance is Cu.

[0038] Process parameters: The medium frequency vibration frequency of the crystallizer is 500Hz, and the low frequency vibration frequency of the pipe end is 200Hz.

[0039] Process steps:

[0040] According to the above-mentioned metal composition, the smelting of 70Cu+As alloy is carried out;

[0041] The smelted melt is introduced into the holding furnace for casting, and when the temperature of the melt is controlled to b...

Embodiment 2

[0046] In Example 2, the above-mentioned coupled vibration casting method for improving the surface quality of the continuous casting ingot was used to cast 70Cu+As copper tubes.

[0047] Ingot composition: 30% Zn, 0.05% As, and the balance is Cu.

[0048] Process parameters: The medium frequency vibration frequency of the crystallizer is 800Hz, and the low frequency vibration frequency of the pipe end is 200Hz.

[0049] Process steps:

[0050] According to the above-mentioned metal composition, the smelting of 70Cu+As alloy is carried out;

[0051] The smelted melt is introduced into the holding furnace for casting, and when the temperature of the melt is controlled to be 50-70°C above the melting point of the alloy, the flow casting is started, and the medium-frequency vibration of the crystallizer and the low-frequency vibration of the pipe end are turned on at the same time;

[0052] The position of the vibrating head of the crystallizer is set within 1 / 3 to 1 / 2 of the l...

Embodiment 3

[0056] In Example 3, the above-mentioned coupled vibration casting method for improving the surface quality of the continuous casting ingot was used to cast 70Cu+As copper tubes.

[0057] Ingot composition: 30% Zn, 0.05% As, and the balance is Cu.

[0058] Process parameters: The medium frequency vibration frequency of the crystallizer is 1000Hz, and the low frequency vibration frequency of the pipe end is 200Hz.

[0059] Process steps:

[0060] According to the above-mentioned metal composition, the smelting of 70Cu+As alloy is carried out;

[0061] The smelted melt is introduced into the holding furnace for casting, and when the temperature of the melt is controlled to be 50-70°C above the melting point of the alloy, the flow casting is started, and the medium-frequency vibration of the crystallizer and the low-frequency vibration of the pipe end are turned on at the same time;

[0062] The position of the vibrating head of the crystallizer is set within 1 / 3 to 1 / 2 of the ...

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Abstract

The invention relates to the field of metal casting, and discloses a coupled vibration casting method for improving the surface quality of continuous casting ingots. The coupled vibration casting method applies intermediate frequency vibration and low frequency vibration to the mold and the end of the ingot respectively. The intermediate frequency Vibration is used to enhance the fluidity of the semi-solid melt in the ingot, and the low-frequency vibration is used to continuously tamp the semi-solid melt in the ingot and to make cracks that have just formed on the surface of the ingot but have not yet been oxidized Welding is carried out under the action of a thrust with a relatively large amplitude, and the medium-frequency vibration applied to the crystallizer is coupled with the low-frequency vibration applied to the end of the ingot. The casting method of the invention can significantly improve the surface smoothness of the ingot, increase the casting speed and yield, the method has strong versatility, is easy to install and design according to various working conditions, and has broad market prospects.

Description

technical field [0001] The invention belongs to the technical field of metal casting, and in particular relates to a coupled vibration casting method for improving the surface quality of continuous casting ingots. Background technique [0002] In the process of semi-continuous casting and horizontal continuous casting of metal ingots, the casting defects that are most likely to occur are cracks on the surface of the ingot that are vertical or parallel to the casting direction. The appearance of such cracks basically means that the ingot is scrapped, because such cracks Usually it will be 5-15mm from the bottom of the ingot surface, and this kind of crack will even cause the ingot to be broken and the casting will stop. In order to eliminate such casting defects, various methods have been adopted in the prior art, including the "pull-stop-reverse push" casting method to enhance the casting cooling strength, etc., but these methods are not suitable for ingots with high composi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D11/16B22D11/114B22D11/053
CPCB22D11/053B22D11/114B22D11/166
Inventor 夏福中魏海根
Owner JIANGXI UNIV OF SCI & TECH
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