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Wear resistant zinc alloy degassing sundries-discharging refining method

A zinc alloy and refining technology, which is applied in the field of environment-friendly wear-resistant zinc alloy degassing and impurity-removing refining, can solve the problems of less use, low inert gas refining cost, and insufficient impurity-removing effect, and achieves simple process and convenient operation. Effect

Active Publication Date: 2012-08-22
镇江汇通金属成型有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Inert gas refining has low cost and no pollution, but the impurity removal effect is not good enough
[0009] Flux covering smelting has high requirements on covering agent, if strict drying treatment is required, it is rarely used in wear-resistant zinc alloy smelting at present

Method used

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  • Wear resistant zinc alloy degassing sundries-discharging refining method

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Experimental program
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Effect test

Embodiment 1

[0027] The material of the wear-resistant zinc alloy casting of this embodiment is composed of the following components accounting for the total mass percentage of the alloy: 72.43% zinc, 25% aluminum, 2.5% copper, 0.02% magnesium, 0.05% cerium, and the weight of the alloy melt is 200kg .

[0028]Preheat the crucible with an intermediate frequency furnace, then add 49.44 kg of aluminum ingot and 5 kg of copper block to the crucible successively, continue to heat the crucible, and keep the temperature up to 680~690°C. When this temperature rise is reached, The aluminum ingot in the crucible is in a completely molten state, and the copper block is partially melted. 15 minutes after the aluminum ingot is melted, use a stirring rod to probe the bottom. After the copper block is not felt, that is, the copper block is completely melted, add 144.86 kg of Zinc ingots, and stop the intermediate frequency furnace to heat the crucible, and keep the aluminum and copper in the crucible ...

Embodiment 2

[0031] The material of the wear-resistant zinc alloy casting of this embodiment is composed of the following components accounting for the total mass percentage of the alloy: 71.63% zinc, 26% aluminum, 2.3% copper, 0.01% magnesium, 0.06% cerium, and the weight of the alloy melt is 200kg .

[0032] Preheat the crucible with an intermediate frequency furnace, then add 51.42 kg of aluminum ingot and 4.6 kg of copper block to the crucible successively, continue to heat the crucible, and keep the temperature up to 680~690°C. , the aluminum ingot in the crucible is in a completely molten state, and the copper block is partially melted. 15 minutes after the aluminum ingot is melted, use a stirring rod to probe the bottom. After the existence of the copper block is not felt, that is, the copper block is completely melted, then add 143.26kg Zinc ingots, and stop the intermediate frequency furnace to heat the crucible, and keep the aluminum and copper in the crucible in a molten state t...

Embodiment 3

[0035] The material of the wear-resistant zinc alloy casting of this embodiment is composed of the following components accounting for the total mass percentage of the alloy: 69.91% zinc, 28% aluminum, 2.0% copper, 0.01% magnesium, 0.08% cerium, and the weight of the alloy melt is 200kg .

[0036] Preheat the crucible with an intermediate frequency furnace, then add 55.57 kg of aluminum ingots and 4 kg of copper block to the crucible successively, continue heating the crucible, and keep the temperature up to 680~690°C. When this temperature rise is reached, The aluminum ingot in the crucible is in a completely molten state, and the copper block is partially melted. 15 minutes after the aluminum ingot is melted, use a stirring rod to probe the bottom. After the copper block is not felt, that is, the copper block is completely melted, add 139.92kg of Zinc ingots, and stop the intermediate frequency furnace to heat the crucible, and keep the aluminum and copper in the crucible...

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Abstract

The invention discloses a wear resistant zinc alloy degassing sundries-discharging refining method, which comprises the following steps of (1) preheating a crucible and sequentially adding an aluminum ingot and a copper block; (2) rising the temperature to 680-700 DEG C for heat preservation, adding a zinc ingot and stopping heating of the crucible after the copper block is completely melted; (3)stirring metal melt after the zinc ingot is totally melted, keeping the temperature in a pot to be 580-620 DEG C, adding a magnesium block, and discontinuously stirring 3-4 times in 10-15 minutes; (4) adding a rare-earth cerium Ce and enabling the rare-earth cerium Ce to be rapidly and evenly spread in the metal melt; (5) leading in nitrogen after dehydration and purification; and (6) enabling liquid-phase wear resistant zinc alloy to be stewed for 3-5 minutes, discharging from a furnace for molding by casting after drossing, and forming a wear resistant zinc alloy casting. The wear resistantzinc alloy degassing sundries-discharging refining method can effectively conduct degassing and sundries-discharging on melting wear resistant zinc alloy, reduces or removes impurities and air holes in the casting, improves acceptability and mechanical property of the casting, simultaneously solves the problem in the prior art that harmful gas is discharged, greatly reduces environmental contamination, and is simple in process and convenient in operation.

Description

technical field [0001] The invention relates to a non-ferrous metal casting method, in particular to an environment-friendly refining method for degassing and impurity removal of wear-resistant zinc alloy. Background technique [0002] Wear-resistant zinc alloys will produce a lot of gas during the melting process, most of which are hydrogen. For example, ZA27 zinc alloy contains about 27% aluminum. During the smelting process, due to the strong affinity between aluminum and oxygen, an oxidation reaction will occur: 2Al+3 / 2O2=Al 2 o 3 . At the same time, aluminum and water vapor and aluminum and hydrocarbons will undergo the following reactions respectively: 2Al+2H2O=Al 4 C 3 +3H 2 ; 4 / 3mAl+CmHn=m / 3 Al 4 C 3 +n / 2H 2 reaction. al 2 o 3 When entering the melt, it will become an impurity. At the same time, the above reaction makes the metal melt contain a large amount of hydrogen. When the metal liquid condenses, the inclusions provide a nucleation interface for gas ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/03C22C1/06C22C18/04
Inventor 纪嘉明鲁远勇张铎吴晶虞建平
Owner 镇江汇通金属成型有限公司
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