Smelting method of ZG06Cr13Ni4Mo steel and ZG06Cr13Ni4Mo steel

Abstract

The invention discloses a smelting method of ZG06Cr13Ni4Mo steel. The smelting method comprises the following steps: S1, burdening calculation: total materials, furnace burden and alloy are calculated according to the amount of molten steel required by the product and are selected by taking 4 wt% of Ni as a target value, and the furnace burden comprises 25Cr2Ni4MoV return scraps, nickel-containing pig iron and high-quality scrap steel; S2, electric arc furnace rough smelting, specifically, furnace burden melting, dephosphorization and decarburization, pre-deoxidation, alloying, reduction and tapping are included, in the dephosphorization and decarburization step, when [C] is smaller than or equal to 0.02% and [P] is smaller than or equal to 0.003%, oxidizing slag is pulled away, and in the pre-deoxidation step, 5.0-6.0 kg / t steel of ferro-aluminum is added for pre-deoxidation after all oxidizing slag is pulled away; and S3, ladle refining, specifically, the total refining time is larger than or equal to 1 h, and hoisting-out pouring is conducted after refining. According to the method, the low-carbon stainless steel product with w (C) of 0.04-0.06% is produced through the electric arc furnace and the refining furnace, the technological process is simple, the smelting period is short, compared with VOD and AOD smelting processes, the equipment complexity is reduced, the smelting cost is low, the average oxygen content in the molten steel is 5.9 ppm, and the purity of the molten steel is improved.

Description

technical field [0001] The invention relates to the field of low-carbon stainless steel smelting, in particular to a method for smelting ZG06Cr13Ni4Mo steel and the ZG06Cr13Ni4Mo steel. Background technique [0002] Low-carbon stainless steel is a material commonly used in the manufacture of important castings for steam turbines, especially ZG06Cr13Ni4Mo steel has a high content of alloying elements, and the carbon content requires C: 0.04-0.06%, which is a typical low-carbon stainless steel. [0003] The existing low-carbon stainless steel smelting method is mainly produced by electric arc furnace + AOD / VOD process. Its main feature is to melt the charge in the electric arc furnace, add high-carbon ferrochrome and other alloys, and carry out oxygen blowing and deoxidation in the AOD / VOD furnace. Carbon, and then go through processes such as re-reduction, slagging, and alloying. However, this smelting process requires proprietary vacuum equipment and argon blowing equipment...

AI Technical Summary

Problems solved by technology

However, this smelting process requires proprietary vacuum equipment and argon blowing equipment, and the basic investment is large, and there are high operating requirements, long smelting production cycle, generally high production costs, and high oxygen content in molten steel.

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