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A kind of anti-oxidation casting method of B30 alloy ingot

A technology of alloy ingot and casting method, applied in the field of anti-oxidation casting of B30 alloy ingot, can solve problems such as worker's health injury, safety hazard, scattering, etc., and achieve the effects of improving comprehensive performance, reducing safety accidents, and preventing hot brittleness

Active Publication Date: 2021-08-06
江苏隆达超合金股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the B30 alloy casting process, in order to prevent the oxidation of the B30 alloy melt, the traditional method is to cover the upper surface of the alloy melt in the mold with a layer of carbon black, and continuously pour carbon black into the mold by artificial means during the casting process. Add carbon black to block the direct contact between the air and the liquid surface of the alloy melt, but this method requires operators to continuously add carbon black, and the carbon black is not only scattered into the surrounding environment during the casting process due to its fine particles, causing pollution , and cause certain harm to workers' health
At the same time, because carbon black has a large specific surface area and a large surface energy, there are certain safety hazards in the flying environment.

Method used

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  • A kind of anti-oxidation casting method of B30 alloy ingot

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Experimental program
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Effect test

Embodiment 1

[0026] Such as figure 1 As shown, the anti-oxidation casting equipment for B30 alloy ingots includes a hearth, an ignition device and a crystallizer. The hearth is arranged above the ignition device. The hearth includes a furnace head 3; 6; the ignition device includes a furnace pan 7 arranged on the top of the ignition device, and a plurality of fire distributor nozzles 8 are arranged on the upper surface of the furnace pan 7, and the adjacent fire distributor nozzles 8 are spaced at 5-10mm intervals, and are distributed in a ring to form a firearm; the ignition device furnace The plate 7 near the crystallizer 2 is provided with a high-temperature-resistant glass window 9; the temperature-measuring probe 10 and the oxygen concentration detector 11 are respectively installed on both sides of the high-temperature-resistant glass 9 window position, and the furnace plate 7 is connected to the crystallizer mold through a quick-loading structure. The base 12 is sealed with a high t...

Embodiment 2

[0028] A method for anti-oxidation casting of B30 alloy ingot, comprising the following steps:

[0029] 1) Crystallizer preparation: raise the dummy table (1) into the cavity of mold 2, and overlap with the bottom of mold 2 by 20-40 mm, and use asbestos rope to fill the mold 2 and dummy ingot layer by layer in the same direction The gap between the tables 1; the crystallizer 2 is a graphite crystallizer with a height of 200-250mm and an inner diameter of 182-184mm;

[0030] 2) Ironing furnace head: tilt the furnace platform so that the copper liquid immerses the furnace head, control the temperature of the furnace head to 1200-1350 ° C, melt the residual metal on the stopper 4, the bottom bowl 5, and the pouring pipe 6 to ensure that the ingot is cast The normal rotation of the stopper rod 4, the stopper rod 4 and the bottom bowl 5 are in good condition, and the copper liquid flow can be adjusted normally; the stopper rod 4, the bottom bowl 5, and the pouring pipe 6 are all ma...

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Abstract

The invention provides a B30 alloy ingot anti-oxidation casting method, comprising the following steps: 1) filling the gap between the crystallizer (2) and the dummy table (1) with thermal insulation material; Tilt the copper liquid to immerse the burner head to melt the residual metal on the stopper (4), bottom bowl (5) and pouring pipe (6); 3) Ignition: open the gas valve to let the gas pass through the gas pipeline (13) to the furnace plate ( 7), flow out from the nozzle of the fire distributor (8), and ignite it with the igniter; 4) Make the bottom: Tilt the hearth, unscrew the stopper (4), let part of the copper liquid flow into the crystallizer (2), and form after cooling and solidification Base; 5) Casting: The copper liquid is cooled and solidified in the crystallizer (2) to form a copper alloy ingot, the dummy table (1) is lowered, and the copper alloy ingot is pulled out of the mold (2) to obtain a B30 alloy ingot. The invention is simple and convenient to operate, has strong versatility, prevents oxidation of the B30 alloy extruded ingot during casting, and improves the working environment.

Description

technical field [0001] The invention relates to the technical field of non-ferrous metal processing, in particular to a B30 alloy ingot anti-oxidation casting method. Background technique [0002] At present, in the semi-continuous production process of B30 alloy ingots, medium-frequency induction furnaces are usually used for melting, and then the alloy is drained into the crystallizer through graphite pouring tubes, and solidified under the action of cooling water to form ingots. During the process to the crystallizer, the surface of the solidified liquid cavity in the crystallizer will be in direct contact with the atmosphere. At high temperature, the surface of the alloy melt easily forms Cu with oxygen in the air. 2 O, during the subsequent solidification of the alloy melt, Cu 2 O will be distributed at the grain boundary as a eutectic with a low melting point, causing hot embrittlement of the copper alloy. Especially when the hydrogen removal is insufficient during ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D11/18B22D7/00
CPCB22D7/005B22D11/004B22D11/18
Inventor 潘坤浦益龙周向东郑晓飞曾秋婷
Owner 江苏隆达超合金股份有限公司
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