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GH4169 alloy steel electroslag remelting refining slag and method for performing electroslag re-melting on GH4169 alloy steel

A GH4169, electroslag remelting technology, which is applied in the field of electrometallurgy and black metal materials, can solve the problems of weak removal of harmful elements and inclusions, easy burning, poor surface finish of steel ingots, etc., and achieves unstable oxidation The effect of low content of substances and variable price oxides, simple preparation process, and good market application prospects

Active Publication Date: 2016-07-06
宝武特冶航研科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

GH4169 alloy steel is a nickel-based superalloy strengthened by body-centered square γ" and face-centered cubic γ' phase precipitation. The GH4169 alloy steel remelting slag used in the prior art makes the GH4169 alloy steel The aluminum and titanium elements in it are easy to burn out, and the surface finish of the steel ingot is not good, and the removal effect of harmful elements and inclusions is weak, so there are certain shortcomings.

Method used

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  • GH4169 alloy steel electroslag remelting refining slag and method for performing electroslag re-melting on GH4169 alloy steel
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  • GH4169 alloy steel electroslag remelting refining slag and method for performing electroslag re-melting on GH4169 alloy steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A GH4169 alloy steel electroslag remelting refining slag, comprising the following components by weight: 65 parts of CaF 2 , 15 Al 2 o 3 , 12 parts of CaO, 3 parts of MgO and 5 parts of TiO 2 .

[0030] The method for carrying out electroslag remelting of GH4169 alloy steel by using the above electroslag remelting refining slag comprises the following steps:

[0031] 1) Prepare the remelting refining slag according to the formula described in this example, and bake the remelting refining slag at 800° C. for 7 hours;

[0032] 2) Using GH4169 alloy steel as the consumable electrode, assemble the electroslag remelting furnace, add the remelting and refining slag baked in step 1) into the crystallizer of the electroslag remelting furnace, and add aluminum powder and Ferro-titanium powder, set voltage 58V, current 2500A to energize and start the arc, and set up a slag pool; wherein, the mass ratio of aluminum powder, ferro-titanium powder and the remelted refining slag i...

Embodiment 2

[0038] A GH4169 alloy steel electroslag remelting refining slag, comprising the following components by weight: 60 parts of CaF 2 , 20 Al 2 o 3 , 10 parts CaO, 5 parts MgO and 5 parts TiO 2 .

[0039] The method for carrying out electroslag remelting of GH4169 alloy steel by using the above electroslag remelting refining slag comprises the following steps:

[0040] 1) Prepare the remelting refining slag according to the formula described in this example, and bake the remelting refining slag at 750° C. for 9 hours;

[0041] 2) Using GH4169 alloy steel as the consumable electrode, assemble the electroslag remelting furnace, add the remelting and refining slag baked in step 1) into the crystallizer of the electroslag remelting furnace, and add aluminum powder and Ferro-titanium powder, set voltage 57V, current 2700A to energize and start the arc, and establish a slag pool; wherein, the mass ratio of aluminum powder, ferro-titanium powder and the remelted refining slag is 11:8...

Embodiment 3

[0047] A GH4169 alloy steel electroslag remelting refining slag, comprising the following components by weight: 70 parts of CaF 2 , 15 Al 2 o 3 , 5 parts of CaO, 6 parts of MgO and 4 parts of TiO 2 .

[0048] The method for carrying out electroslag remelting of GH4169 alloy steel by using the above electroslag remelting refining slag comprises the following steps:

[0049] 1) Prepare the remelting refining slag according to the formula described in this example, and bake the remelting refining slag at 750° C. for 8 hours;

[0050] 2) Using GH4169 alloy steel as the consumable electrode, assemble the electroslag remelting furnace, add the remelting and refining slag baked in step 1) into the crystallizer of the electroslag remelting furnace, and add aluminum powder and Ferro-titanium powder, set voltage 55V, current 3000A to energize and start the arc, and establish a slag pool; wherein, the mass ratio of aluminum powder, ferro-titanium powder and the remelting refining sla...

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Abstract

The invention provides GH4169 alloy steel electroslag remelting refining slag and a method for performing electroslag remelting on GH4169 alloy steel. The GH4169 alloy steel electroslag remelting refining slag comprises the following components in parts by weight: 60-70 parts of CaF2, 15-20 parts of Al2O3, 5-15 parts of CaO, 3-6 parts of MgO and 4-8 parts of TiO2. The method comprises: baking the remelting refining slag, taking the GH4169 alloy steel as a consumable electrode, assembling an electroslag remelting furnace, adding the baked remelting refining slag, aluminum powder and ferrotitanium powder into a crystallizer, turning on power for arc starting so as to establish a slag bath, and then performing remelting smelting on the consumable electrode under the protection of an inert gas. The refining slag provided by the invention has the characteristics of low melting point, low viscosity, high specific resistance, and relatively low air permeability in a high-temperature liquid state, and by adopting the refining slag, less aluminum and titanium elements during remelting of a GH4169 alloy can be over-burnt, so that the obtained steel ingots have bright and clean surfaces and also have qualified and uniform components.

Description

technical field [0001] The invention belongs to the technical field of electrometallurgy of black metal materials and relates to the technical field of electrometallurgy, in particular to GH4169 alloy steel electroslag remelting refining slag and a method for electroslag remelting of GH4169 alloy steel. Background technique [0002] "If you want to make good steel, you must make good slag" not only explains the relationship between slag and steel quality, but also points out the relationship between slag and steel quality and the importance of slag quality. The slag used for electroslag remelting is one of the key factors determining the quality of remelted steel and alloys. The selection of electroslag metallurgical slag system, proportion and slag amount has great significance for the metallurgical quality of electroslag steel, smelting technical and economic indicators and environmental protection. significance. Therefore, it is extremely important to select the slag sys...

Claims

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Application Information

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IPC IPC(8): C22B9/18B22D23/10C22C38/54C22C38/50C22C38/48C22C38/44C22C38/42
CPCB22D23/10C22B9/18C22C38/42C22C38/44C22C38/48C22C38/50C22C38/54
Inventor 秦洪伟
Owner 宝武特冶航研科技有限公司
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