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Remelting method of electroslag ingot for cold roll

A technology of electroslag remelting and electroslag ingot, which is applied in the field of iron and steel metallurgy

Active Publication Date: 2021-01-26
CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, how to prepare high-quality electroslag ingots for cold rolling rolls by electroslag remelting, so as to prepare qualified cold rolling rolls for subsequent processes, there is currently no effective solution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] This embodiment is to use the method of the present invention to produce Φ1100mm electroslag ingots, and the specific steps are as follows:

[0045] a. The raw materials are initially smelted in an electric arc furnace. After the smelting is completed, the molten steel is placed in a ladle refining furnace to refine the molten steel, and adjusted according to the composition requirements, and then vacuum degassed. After the molten steel is refined, it is molded into Φ730mm corrugated Ingot electrode rod;

[0046] b. Remove the risers of the casted 2 Φ730mm corrugated ingot electrode rods and weld the dummy electrodes, then check the surface quality of the electrode rods, clean up impurities such as iron oxide scale, and then put the electrode rods into the bottom of the car for heat treatment The furnace is heated and baked, the heating temperature is 840±10°C, the heating rate is ≤60°C / h, and the holding time is 12 hours;

[0047] c. Benxi steel or similar steel types...

Embodiment 2

[0054] This embodiment is to use the method of the present invention to produce Φ1100mm electroslag ingots, and the specific steps are as follows:

[0055] a. The raw materials are initially smelted in an electric arc furnace. After the smelting is completed, the molten steel is placed in a ladle refining furnace to refine the molten steel, and adjusted according to the composition requirements, and then vacuum degassed. After the molten steel is refined, it is molded into Φ730mm corrugated Ingot electrode rod;

[0056] b. Remove the risers of the casted 2 Φ730mm corrugated ingot electrode rods and weld the dummy electrodes, then check the surface quality of the electrode rods, clean up impurities such as iron oxide scale, and then put the electrode rods into the bottom of the car for heat treatment The furnace is heated and baked, the heating temperature is 850±10°C, the heating rate is ≤60°C / h, and the holding time is 15 hours;

[0057] c. Benxi steel or similar steel types...

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PUM

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Abstract

The invention discloses a method for remelting electroslag ingots for cold rolling rolls, belonging to the technical field of iron and steel metallurgy. The technical problem to be solved by the present invention is how to prepare high-quality electroslag ingots for cold rolling rolls through electroslag remelting. The invention provides a method for remelting electroslag ingots for cold rolling rolls, which includes the steps of baking electrode rods, selecting and baking slag systems, melting protective slag, electroslag remelting process, annealing process and the like. The present invention improves the chemical composition of the electrode rod, selects a suitable slag system, bakes the electrode rod and slag material, adjusts the electroslag remelting and annealing process, and prepares an electroslag ingot with good internal and external quality for cold rolling rolls. There are no defects such as ripples or slag grooves, and the high and low magnification inspections meet the quality requirements of the first-level billet, providing favorable conditions for the subsequent process to ensure product quality.

Description

technical field [0001] The invention belongs to the technical field of iron and steel metallurgy, and in particular relates to a method for remelting electroslag ingots for cold rolling rolls. Background technique [0002] The roll is one of the parts with the most complicated working conditions in the rolling mill, and it is also a high-tech product with the highest quality requirements, special materials, and complex manufacturing processes among roll products. With the rapid development of modern economic construction, the operating efficiency of large-scale cold rolling mills and the quality requirements of plates are constantly improving, and the required material strength requirements are getting higher and higher. Good performance and other aspects of development. The development of rolls at home and abroad mainly increases the content of Cr in cold rolls, from the initial 2% Cr to the 5% Cr cold rolls commonly used in the market, and continuously optimizes alloys su...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C7/00C21C7/06C21C7/10C21D1/30C21D3/06C21D6/00C21D9/00C22B9/18C22C38/02C22C38/04C22C38/06C22C38/44C22C38/46
CPCC21C7/0006C21C7/06C21C7/10C21D1/30C21D3/06C21D6/004C21D6/005C21D6/008C21D9/0068C22B9/18C22C38/001C22C38/002C22C38/005C22C38/02C22C38/04C22C38/06C22C38/44C22C38/46Y02P10/20
Inventor 林发驹李宗周蔡武张建
Owner CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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