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Method for electroslag remelting by utilizing novel slag system

A technology of electroslag remelting and electroslag remelting furnace, which is applied in the field of electroslag remelting of new slag system, can solve the problems of inconsistent burning loss, large head and tail deviation, unqualified composition, etc., and achieve good forging performance and longitudinal segregation small, quality-enhancing effect

Inactive Publication Date: 2014-04-23
常州中钢精密锻材有限公司
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Problems solved by technology

However, there are different degrees of burning loss problems in Al and Ti during the smelting process.
In the process of electroslag remelting, from the start of the arc to the end of the smelting, the longitudinal burning loss is inconsistent, which may easily cause a large deviation between the head and the tail, resulting in unqualified components

Method used

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Embodiment Construction

[0012] A kind of embodiment of the method for carrying out electroslag remelting with novel slag system of the present invention, the steps are:

[0013] a. Prepare a new type of slag, the ratio of the slag is 45kg4Ti slag, 30Kg CaF2, 15Kg Al2O3, the full name of the new type of slag is 60 / 10 / 3 / 25 / 2Ti slag, and the specific composition is 60%CaF 2 , 10%CaO, 3%MgO, 25%Al 2 o 3 , 2%TiO 2 ;

[0014] b. In the smelting preparation stage, put 50% of the new slag material on the bottom of the electroslag remelting furnace, and mix 700g of aluminum beans in the slag material;

[0015] c. Add the remaining 50% of the new slag material into the crucible of the electroslag remelting furnace during the arc-starting stage of smelting. During the normal smelting process, add 100g of aluminum beans every 15 minutes in the first 1 hour, and add 50g of aluminum beans every 15 minutes thereafter;

[0016] d. Smelting into electroslag ingots.

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Abstract

The invention relates to a method for electroslag remelting by utilizing a novel slag system. The principle that the content of Al and the content of Ti in the slag liquid and the molten steel are balanced, the slag is proportioned, so that the burning of the Al and Ti is stable, the longitudinal macrosegregation is small, the product qualification rate can be increased, the quality can be improved, the quality can be stabilized, the forging effect of the 625 alloy produced by utilizing 4Ti slag is good, a severe angle cracking is produced in the forging process before the improvement, the rate of the finished material is low, and even the finished material is rejected, and the weaknesses can be eliminated after the improvement, and the forging property is good and stable.

Description

technical field [0001] The invention relates to a method for electroslag remelting with a novel slag system. Background technique [0002] In nickel-based corrosion-resistant alloys and high-temperature alloys, many grades of alloys are added with different components of Al and Ti. Since the solubility of Al and Ti is very small in Ni, they mainly form γ' phase—Ni3(Al,Ti) Type strengthening phase, through the γ' phase dispersed in the matrix, affects the behavior of dislocations, so as to achieve the strengthening effect of the alloy. Increasing the content of Al and Ti can improve the heat resistance strength. However, Al and Ti have different degrees of burning loss during the smelting process. In the process of electroslag remelting, from the start of arc to the end of smelting, the burning loss in the longitudinal direction is inconsistent, which may easily cause a large deviation from the head to the tail, resulting in unqualified components. Contents of the inventi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B9/18
Inventor 胡燕梅张建明
Owner 常州中钢精密锻材有限公司
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