A Method of Improving the Grain Size of Blade Steel 2cr12mov

Abstract

The invention discloses a method for improving the grain size of blade steel 2Cr12MoV. The method for improving the grain size of the blade steel 2Cr12MoV comprises the steps of forging the blade steel, placing the forged blade steel into a heat treatment furnace, heating the forged blade steel to a certain temperature, keeping warm for a period of time, and then water cooling; tempering the water-cooled blade steel, and tapping and air cooling after multiple heating and insulation treatment; and carrying out follow-up quenching and tempering treatment. According to the method for improving the grain size of the blade steel 2Cr12MoV provided by the invention, after the blade steel is subjected to a follow-up quenching and tempering treatment process, the performance and the material of the blade steel are adjusted to a large extent, the strength, the plasticity and the toughness of the blade steel are improved, and the problem that the grains of the blade steel 2Cr12MoV produced through traditional forging, quenching and tempering processes are abnormal, thick and big is solved; and according to a blade steel material manufactured by the method, coarse grain materials produced in the process can be improved or remedied, the rejection rate is reduced, and the benefit is increased.

Description

technical field [0001] The invention relates to a method for improving the grain size of blade steel, in particular to a method for improving the grain size of blade steel 2Cr12MoV, and belongs to the technical field of application of steel grain size control methods for manufacturing gas turbine blades. Background technique [0002] Blades are one of the key components of an engine. The surface quality, internal quality and mechanical properties of the blade directly affect its comprehensive performance. The blade steel works in harsh environments such as high temperature and large alternating stress. The fine-grained structure with good fatigue resistance and high-temperature creep-resistant dense group, the control of special steel grain size is the key to metallurgical workers' hard work. At present, the main non-conforming items of steel blades in the production of grain size occupy a large ratio, so it is necessary to solve or improve the current situation of grain si...

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Problems solved by technology

[0003] Comparative patent, application number: 201510190155.0, a method for preparing an aluminum-titanium alloy impeller, the mass percentage content of each component of the alloy includes: Al 7.6%, Ni 0.76%, Co 0.76%, V 0.86%, Cr 0.36% , Sn0.36%, Fe 0.076%, Cu 0.036%, Pr 0.056%, Ce 0.016%, Mg 0.56%, Mo 0.56%, Si0.76%, the balance is titanium and unavoidable non-metallic impurities, titanium alloy plate The strength reaches more than 1200MPa, but this method of manufacturing the alloy impeller does not greatly improve the alloy in its essence, and it is difficult to control the composition of its material

[0004] At present, all kinds of superalloy turbine blades are generally cast in the factory. Due to the harsh working conditions of the turbine blades, the blade material is required to have good comprehensive performance, and the original grain size of the cast superalloy is relatively coarse. The plasticity and fatigue properties are lower than those of deformed superalloys, resulting in low reliability of the blade steel during the working process, resulting in a short service life of the blade steel and high manufacturing costs

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