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Stainless steel electroslag ingot remelting method

An electroslag ingot and stainless steel technology, applied in the field of electroslag remelting, can solve the problems of low efficiency and high energy consumption, and achieve the effects of good toughness, low grain size and balanced grain size

Pending Publication Date: 2019-05-10
烟台台海玛努尔核电设备有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention aims at the problem of high energy consumption and low efficiency of the existing electroslag remelting technology, and provides a method for remelting stainless steel electroslag ingots

Method used

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  • Stainless steel electroslag ingot remelting method

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Embodiment 1

[0014] A method for remelting stainless steel electroslag ingots, comprising the following steps: 1) selecting equipment: a, adopting a three-phase bipolar series electroslag remelting furnace, and using the bottom pad of this steel type in the remelting furnace; b, adopting an electric arc furnace+AOD furnace The consumable electrode produced; c, using a copper wall water-cooled crystallizer, the diameter of the crystallizer is about 2300mm; 2) Slagging: assemble pre-melted slag, use Ti arc ignition agent, and the consumable electrode starts arcing directly; 3) Remelting: The electrode filling area ratio is controlled to be 0.35, and the electrode exchange adopts a three-phase alternating exchange method. During each exchange process, two phases are in a normal remelting state, and the six electrodes of the three-phase bipolar series electroslag furnace are evenly distributed. The melting rate is controlled at 3t / h; 4) Exchange: Double electrodes are used for hoisting at the s...

Embodiment 2

[0016] A method for remelting stainless steel electroslag ingots, comprising the following steps: 1) selecting equipment: a, adopting a three-phase bipolar series electroslag remelting furnace, and using the bottom pad of this steel type in the remelting furnace; b, adopting an electric arc furnace+AOD furnace The consumable electrode produced; c, using a copper wall water-cooled crystallizer, the diameter of the crystallizer is about 1600mm; 2) Slagging: assemble pre-melted slag, use Ti arc ignition agent, and the consumable electrode starts arcing directly; 3) Remelting: The electrode filling area ratio is controlled to be 0.2, and the electrode exchange adopts a three-phase alternating exchange method. During each exchange process, two phases are in a normal remelting state, and the six electrodes of the three-phase bipolar series electroslag furnace are evenly distributed. The melting rate is controlled at 1.5t / h; 4) Exchange: Double electrodes are used for hoisting at the ...

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Abstract

The invention discloses a stainless steel electroslag ingot remelting method. The stainless steel electroslag ingot remelting method includes steps such as selecting equipment, slagging, remelting, exchanging, and feeding. The method adopts the remelting process with combination of a steel bottom pad, a Ti arc starting agent and a consumable electrode for direct arcing, the component segregation problem caused by the deviation of the electrode smelting components is effectively reduced, an electrode filling pitch is reasonably controlled, and the problem of high melting rate caused by unequallength of the electrode is avoided, so that the melting rate is reduced from 3-4 tons per hour to 1.5-3 tons per hour, and the solidification quality of the ingot is significantly improved; power consumption of unit product by the method is low and close to the power consumption level of a coaxial conductive electroslag furnace, so that energy consumption is effectively reduced; and the stainlesssteel electroslag ingot prepared by the method has high strength, good toughness, low and balanced crystal grains, and meets demands for steels in nuclear power field and other high-end fields.

Description

technical field [0001] The invention relates to the technical field of electroslag remelting, in particular to a method for remelting stainless steel electroslag ingots. Background technique [0002] Nuclear power technology is a technology that uses the energy released by nuclear fission or fusion reactions to generate electricity. The safety of nuclear reactors and their ancillary equipment has extremely high requirements. The preparation of metal products used in nuclear power technology is also different from conventional metal products, and its strength, toughness, cleanliness, grain size and corrosion resistance are all higher than conventional metal products. Electroslag remelting technology can purify metals and produce high-performance steel ingots. The steel ingots produced have high purity, low sulfur content, less non-metallic inclusions, smooth surface of steel ingots, clean, uniform and dense, uniform metallographic structure and chemical composition, and cast...

Claims

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Application Information

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IPC IPC(8): C22B9/18
Inventor 刘仲礼陈革樊树斌杨传浩宋道滨
Owner 烟台台海玛努尔核电设备有限公司