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Stripping electroslag furnace, application thereof and ledeburite carbide control method

A technology of electroslag furnace and ledeburite, which is applied in special data processing applications, electrical digital data processing, design optimization/simulation, etc., and can solve problems such as refining the core grains of remelting ingots and internal quality control. , to achieve the effect of avoiding steel breakout and preventing explosion

Inactive Publication Date: 2019-01-04
上大鑫仑材料科技(广东)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under this requirement, in order to improve the quality of the electroslag ingot produced by the traditional electroslag remelting process and further reduce the grain size and carbide segregation in the core of the electroslag ingot, researchers at home and abroad have made a series of improvements to it and Proposed a new process, developed technologies such as rapid electroslag remelting and electroslag continuous casting, but it is still insufficient in refining the core grains of the remelting ingot and internal quality control

Method used

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  • Stripping electroslag furnace, application thereof and ledeburite carbide control method
  • Stripping electroslag furnace, application thereof and ledeburite carbide control method
  • Stripping electroslag furnace, application thereof and ledeburite carbide control method

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Embodiment 1

[0033] The electrode rod is used as the electroslag remelting anode for remelting refining, using such as figure 1 The shown ingot electroslag remelting furnace. In this embodiment, two different electroslag remelting processes are used. One is the traditional crystallizer-placed electroslag remelting furnace, and the produced electroslag ingot specifications are Φ220mm; the other is the pumping electroslag remelting furnace, which is electric The slag ingot specification is Φ220mm. The test material is M2 high-speed steel, the composition is shown in Table 1, and the slag system is CaF 2 60%, Al 2 O 3 20%, CaO 20% ternary slag system, melting temperature is greater than 1500℃, the loss of electroslag ingot is about 1% of the weight of the electrode rod, the electroslag remelting process parameters are shown in Table 2 below, the electroslag remelting process production The electroslag ingot cooling rate is faster and there is a large residual stress inside. In order to preve...

Embodiment 2

[0046] The electrode rod is used as the electroslag remelting anode for remelting refining, using such as figure 1 The shown ingot electroslag remelting furnace. In this embodiment, two different electroslag remelting processes are used. One uses a traditional crystallizer-mounted electroslag remelting furnace, and the produced electroslag ingot specifications are Φ300mm; the other uses an ingot electroslag remelting furnace, which The ingot specification is Φ300mm. The test material is M2 high-speed steel, the composition is shown in Table 3 below, the slag system is CaF2 60%, Al2O3 20%, CaO 20% ternary slag system, melting temperature is greater than 1500℃, the loss of electroslag ingot is about electrode The electroslag remelting process parameters are shown in Table 4 below. The electroslag ingot produced by the electroslag remelting process has a faster cooling rate and large residual stress inside. In order to prevent cracking, the electroslag The ingot is preheated in a...

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Abstract

The invention discloses a stripping electroslag furnace, an application thereof to ledeburite carbide control, and further discloses a ledeburite carbide control method. The stripping water cooling electroslag furnace is adopted, on the basis of the traditional bottom drawing type crystallizer electroslag furnace, an ESR (electroslag remelting) ingot is drawn from a crystallizer, stripping speed is obtained by simulating the quantitative relationship between the stripping speed and size of the ESR ingot, spray cooling water is adopted for cooling, and the ESR ingot is prevented from bursting;a thermocouple is placed in a reasonable position of the crystallizer to control temperature, temperature of the ESR ingot can be monitored in the whole process conveniently, and breakout is avoided.Carbide segregation can be improved obviously, ledeburite carbide segregation in cast-condition annealed structure of high-speed steel is relieved, size is reduced, level of eutectic carbide is reduced by 2-3 levels, size of the largest carbide is reduced by 30% or more, and medium diameter size of the carbide is reduced by 20% or more.

Description

Technical field [0001] The invention relates to the technical field of the metallurgical industry, in particular to an ingot type electroslag furnace and its application and a method for controlling ledeburite carbides. Background technique [0002] As a high-speed cutting tool material, high-speed steel plays an important role in my country's manufacturing industry. Due to the high red hardness, good wear resistance, good process performance, strength and toughness of high-speed steel, it is mainly used to manufacture complex thin blades. And impact-resistant metal cutting tools can also be used to manufacture cold work molds, rolls, high-temperature bearings and high-temperature springs with high performance requirements. However, the composition characteristics of high-speed steel determine that there will be a large number of eutectic ledeburite carbides in the structure. The common problem that high-speed steel has been paying attention to during the development process is ho...

Claims

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Application Information

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IPC IPC(8): C22B9/193C22B9/18C21D1/26C22C38/24C22C38/22C22C38/04C22C38/02G06F17/50
CPCC21D1/26C21D2211/007C22B9/18C22C38/002C22C38/02C22C38/04C22C38/22C22C38/24G06F30/20
Inventor 吴晓春
Owner 上大鑫仑材料科技(广东)有限公司
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