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Method for Melting Nickel-Based Alloy in Non-vacuum Induction Furnace

A non-vacuum induction furnace, nickel-based alloy technology, applied in the field of metallurgy, can solve the problems of complex structure, difficult operation, high price, etc., and achieve the effect of improving comprehensive mechanical properties, strong deoxidation and degassing ability, and reducing scrap rate.

Active Publication Date: 2016-08-24
ZHANGJIAGANG FEILANG PUMP & VALVE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the smelting process, the molten metal will be oxidized and gettered. Even if a covering agent is used to cover the surface of the molten metal during the smelting process, the oxidation and gettering cannot be well alleviated, which will lead to nickel-based alloys. There are a large number of pores in the parts, and a large number of inclusions will be generated on the grain boundaries of the nickel-based alloy parts; The action of force will produce strong stirring. Due to the existence of electromagnetic stirring force, the surface of the molten metal will have a hump phenomenon. The hump will destroy the slag covering the surface of the molten metal, so that the slag cannot completely cover the entire molten metal. The surface of the molten metal, the surface of the molten metal exposed in the air will be oxidized and form metal oxides, which will inevitably greatly reduce the comprehensive mechanical properties of the nickel-based alloy parts obtained after smelting
In order to reduce oxidation and gettering, vacuum melting or electroslag melting is generally used when melting nickel-based alloys. However, vacuum melting equipment and electroslag melting equipment are complex in structure, expensive, difficult to operate, and have many equipment failures, which are time-consuming and labor-intensive. The production efficiency is low, and it is difficult to meet the production of large-scale, complex structure and large-scale nickel-based alloy parts, so it is not suitable for large-scale production

Method used

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  • Method for Melting Nickel-Based Alloy in Non-vacuum Induction Furnace

Examples

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Effect test

Embodiment 1

[0014] In this embodiment, the material of smelting 95kg is taken as an example for illustration, such as figure 1 As shown, a crucible 1 is set in the furnace 2 of the intermediate frequency induction furnace, the height ratio of the crucible 1 to the height of the furnace 2 is 0.4:1, the induction coil 3 is wound on the outer wall of the furnace 2 and the height of the induction coil 3 is not higher than The height of the crucible 1, the load quality factor of the induction coil 3 is 20, the number of turns of the induction coil 3 is 18 turns, the distance between each turn is 2.9mm, the ratio of the height of the induction coil 3 to the diameter of the induction coil 3 is 1:0.65 , the induction coil 3 is also covered with a crucible cover 4; then 95kg of material to be smelted is put into the crucible 1 for melting, and the liquid level height of the melted molten metal will be higher than the height of the induction coil 3. This implementation In the example, the liquid le...

Embodiment 2

[0016] In this embodiment, smelting 100kg of material is taken as an example for illustration, such as figure 1 As shown, a crucible 1 is set in the furnace 2 of the intermediate frequency induction furnace, the height ratio of the crucible 1 to the height of the furnace 2 is 0.51:1, the induction coil 3 is wound on the outer wall of the furnace 2 and the height of the induction coil 3 is not higher than The height of the crucible 1, the load quality factor of the induction coil 3 is 20, the number of turns of the induction coil 3 is 18 turns, the spacing between each turn is 3mm, the height of the induction coil 3 and the diameter ratio of the induction coil 3 are 1:0.712, The induction coil 3 is also provided with a crucible cover 4; then 100kg of material to be smelted is put into the crucible 1 for melting, and the liquid level height of the melted molten metal is higher than the height of the induction coil 3. In this embodiment, In the process, the liquid level of the me...

Embodiment 3

[0018] In this embodiment, the material of smelting 105kg is taken as an example for illustration, such as figure 1 As shown, a crucible 1 is set in the furnace 2 of the intermediate frequency induction furnace, the height ratio of the crucible 1 to the height of the furnace 2 is 0.6:1, the induction coil 3 is wound on the outer wall of the furnace 2 and the height of the induction coil 3 is not higher than The height of the crucible 1, the load quality factor of the induction coil 3 is 20, the number of turns of the induction coil 3 is 18 turns, the distance between each turn is 3.1mm, and the ratio of the height of the induction coil 3 to the diameter of the induction coil 3 is 1:0.75 , the induction coil 3 is also covered with a crucible cover 4; then 105kg of material to be smelted is put into the crucible 1 for melting, and the liquid level height of the melted molten metal will be higher than the height of the induction coil 3. This implementation In the example, the liq...

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Abstract

The invention discloses a method for smelting a nickel-based alloy by adopting a non-vacuum induction furnace. The method for smelting the nickel-based alloy by adopting the non-vacuum induction furnace comprises the following steps: firstly transforming a medium-frequency induction furnace, then putting materials to be molten into a crucible to be molten, wherein frequency of the medium-frequency induction furnace is controlled to be 1868 minus or plus 5 HZ; continuously injecting inert liquid into the medium-frequency induction furnace in a material smelting process and carrying out deoxidization on molten metal, after the materials are completely molten, carrying out deoxidization for 10-15 minutes, wherein temperature of the molten metal to be 1530 minus or plus 5 DEG C; increasing temperature of the medium-frequency induction furnace to be 1550 minus or plus 5 DEG C after deoxidization is completed, then adding a solid non solution treatment agent into the molten metal, wherein mass ratio of the non solution treatment agent to the molten metal is (2:1000)-(3:1000), and pouring after the non solution treatment agent is completely molten in the molten metal, so that the nickel-based alloy is obtained. The method for smelting the nickel-based alloy by adopting the non-vacuum induction furnace has the advantages that oxidation and inspiration phenomena can be effectively reduced under non-vacuum high temperature condition, and a hump phenomenon can be effectively eliminated.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a method for melting nickel-based alloys in a non-vacuum induction furnace. Background technique [0002] The intermediate frequency induction furnace belongs to the non-vacuum induction furnace. The intermediate frequency induction furnace is equipped with a furnace for melting materials. The induction coil is wound on the outer wall of the furnace. The material is smelted under the high temperature conditions of the intermediate frequency induction furnace. The molten metal melt after melting It is poured into the mold shell to form the nickel base alloy part. During the smelting process, the molten metal will be oxidized and gettered. Even if a covering agent is used to cover the surface of the molten metal during the smelting process, the oxidation and gettering cannot be well alleviated, which will lead to nickel-based alloys. There are a large number of pores in the par...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/02C22C19/03
Inventor 张莉华
Owner ZHANGJIAGANG FEILANG PUMP & VALVE
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