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Method for determining morphology of metal molten pool for electroslag remelting

An electroslag remelting and metal molten pool technology, applied in the field of metallurgical technology, can solve the problems of difficult operation, danger, and inability to intuitively see the degree of dendrite segregation solidification structure information, etc. low effect

Inactive Publication Date: 2016-06-15
XINING SPECIAL STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has the following disadvantages: 1. It can only measure the shape of remelting, and cannot intuitively see the solidification structure information such as the degree of dendrite segregation and the direction of dendrite growth when the metal is solidified; Carry out when the height of the slag remelting meets the measurement height in the later stage; 3. At the same time, there is a certain risk

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  • Method for determining morphology of metal molten pool for electroslag remelting

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specific Embodiment 1

[0028] A method for measuring the morphology of an electroslag remelted metal bath, including the following steps:

[0029] (1) In the whole process of electroslag remelting, add iron sulphur particles into the slag pool evenly every 1.5 hours. The sulphur content of iron sulphur particles is 24%, the diameter of iron sulphur particles is 4mm, and the addition amount is 140g / time. ;

[0030] (2) Dissecting the electroslag ingots obtained by electroslag remelting longitudinally to prepare low-power acid leaching samples;

[0031] (3) Acid leaching low power inspection

[0032] (31) Place the low-power acid leaching sample horizontally in a trough-shaped container, with the inspection side facing up,

[0033] (32) Pour an aqueous solution of nitric acid with a concentration of 40wt% onto the test surface of the low-power acid immersion test piece, and repeatedly scrub the test surface with a brush, and constantly replenish the aqueous solution of nitric acid with a concentration of 40wt%...

specific Embodiment 2

[0040] A method for measuring the morphology of an electroslag remelted metal bath, including the following steps:

[0041] (1) During the whole process of electroslag remelting, add iron sulphur particles into the slag pool evenly every 2.5 hours. The sulphur content of iron sulphur particles is 34%, the diameter of iron sulphur particles is 6mm, and the dosage is 200g / time. ;

[0042] (2) Dissecting the electroslag ingots obtained by electroslag remelting longitudinally to prepare low-power acid leaching samples;

[0043] (3) Acid leaching low power inspection

[0044] (31) Place the low-power acid leaching sample horizontally in a trough-shaped container, with the inspection side facing up,

[0045] (32) Pour an aqueous solution of nitric acid with a concentration of 40wt% onto the test surface of the low-power acid immersion test piece, and repeatedly scrub the test surface with a brush, and constantly replenish the aqueous solution of nitric acid with a concentration of 40wt%.

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specific Embodiment 3

[0052] A method for measuring the morphology of an electroslag remelted metal bath, including the following steps:

[0053] (1) In the whole process of electroslag remelting, add iron sulphur particles into the slag pool evenly every 2 hours. The sulphur content of the iron sulphur particles is 30%, the diameter of the iron sulphur particles is 5mm, and the addition amount is 170g / time. ;

[0054] (2) Dissecting the electroslag ingots obtained by electroslag remelting longitudinally to prepare low-power acid leaching samples;

[0055] (3) Acid leaching low power inspection

[0056] (31) Place the low-power acid leaching sample horizontally in a trough-shaped container, with the inspection side facing up,

[0057] (32) Pour an aqueous solution of nitric acid with a concentration of 40wt% onto the test surface of the low-power acid immersion test piece, and repeatedly scrub the test surface with a brush, and constantly replenish the aqueous solution of nitric acid with a concentration of...

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Abstract

The invention relates to a method for determining morphology of a metal molten pool for electroslag remelting, and belongs to the field of metallurgical technology. The method for determining morphology of the metal molten pool for electroslag remelting comprises the following steps: (1) in a whole process of electroslag remelting, ferrous sulfide particles are uniformly added into a slag bath every 1.5-2.5 hours, sulfur content of the ferrous sulfide particles is 24-34%, diameter of the ferrous sulfide particle is 4-6mm, and addition is 140-200g / every time. (2) vertical dissection of an electroslag ingot is carried out by electroslag remelting, and a macroscopic acid dipping sample is prepared; (3) acid dipping macroscopic examination is carried out; (4) morphology of the surface to be detected of the macroscopic acid dipping sample is observed directly, morphology of the metal molten pool for electroslag remelting and morphology of a solidification structure are obtained, and depth of the metal molten pool is obtained by direct measurement according to morphology of the surface to be detected of the macroscopic acid dipping sample.

Description

Technical field [0001] The invention relates to a method for measuring the shape of an electroslag remelted metal molten pool, which belongs to the technical field of metallurgical technology. Background technique [0002] The morphology of the electroslag remelting metal bath can be measured, the depth of the metal bath can be measured, and the structure of the metal during solidification can be seen, such as the degree of dendrite segregation, the direction of dendrite growth, etc., so as to verify the electroslag remelting process To evaluate the degree of internal segregation in electroslag ingots, it has important guiding significance for the later improvement and optimization of the electroslag remelting process and the improvement of the internal quality of electroslag ingots. [0003] At present, two methods are mostly used in the industry to determine the morphology of the electroslag remelting metal bath. The first method is to add metal tungsten particles with a large s...

Claims

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Application Information

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IPC IPC(8): G01N21/29G01N1/28
CPCG01N21/29G01N1/28
Inventor 孙军钱才让严清忠曹宏杨国姚忠胡发贵
Owner XINING SPECIAL STEEL
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