A Method for Reducing the Difference Between Head and Tail Properties of Electroslag Steel Ingots

Abstract

The invention discloses a method for reducing the performance difference between the head and the tail of an electroslag steel ingot. The method comprises the following specific steps that steel ingot molten liquid is subjected to killing cooling treatment and maintained for a period of time longer than 8 min; the steel ingot molten liquid obtained after killing in the step A is cast, and casting is carried out at the temperature higher than the theoretical liquidus temperature of corresponding cast steel balls by about 40 DEG C-50 DEG C; the steel ingot cast in the step B is subjected to deoxidization treatment, wherein a deoxidizing agent is added into the feeding end of the steel ingot for deoxidization treatment, and the quantity of the deoxidizing agent added in the deoxidization treatment process in the step C is larger than that of a deoxidizing agent added into a bottom end of the steel ingot by 0.02 / Wt%-0.04 / Wt%; the steel ingot deoxidized in the step C is subjected to homogenizing treatment; and the steel ingot treated in the step D is subjected to forging treatment, a 2000T press machine is adopted for forging, and a two-upsetting two-drawing process is adopted for forging an intermediate billet. The method has the beneficial effects that a gas turbine blade material is manufactured through the method, the difference between the head and the tail of the steel ingot can be reduced, the yield of the steel ingot can be increased, and more considerable production benefits are created.

Description

technical field [0001] The invention relates to a method for the head-to-tail performance difference of an electroslag steel ingot, in particular to a method for reducing the head-to-tail performance difference of an electroslag steel ingot, and belongs to the technical field of gas turbine blade material method application. Background technique [0002] With the increase of domestic electricity consumption, environmental protection requirements and the development of gas turbine manufacturing technology in China, gas turbines are widely used for power generation, but the current gas turbines have many shortcomings. The working temperature and pressure of gas turbines and the working environment and operation The safety requirements are very different from those of ordinary generator sets. The blades and bolt materials of existing gas turbines are already difficult to meet the requirements. Research has an irreplaceable role. Contents of the invention [0003] The object ...

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Problems solved by technology

[0002] With the increase of domestic electricity consumption, environmental protection requirements and the development of gas turbine manufacturing technology in China, gas turbines are widely used for power generation, but the current gas turbines have many shortcomings. The working temperature and pressure of gas turbines and the working environment and operation The safety requirements are very different from those of ordinary generator sets. The blades and bolt materials of existing gas turbines are already difficult to meet the requirements. Research has an irreplaceable role

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