gh4049 sphere aluminizing method

A technology of aluminizing and spheres, applied in the field of GH4049 sphere aluminizing, can solve the problems that the hardness is difficult to meet the design requirements, increase the difficulty of heat treatment, and it is difficult to guarantee the hardness value, etc., to achieve good production verification effect, reduce the risk of hardness, and shorten production. effect of time

Active Publication Date: 2018-01-23
CHINA HANGFA GUIZHOU LIYANG AVIATION POWER CO LTD
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Problems solved by technology

[0003] GH4049 is a complex alloyed nickel-based hard-to-deform superalloy. After heat treatment using the heat treatment system corresponding to the hardness value range HB302-363 specified in the standard, it is difficult to guarantee the hardness value in this range, and often rework is still unqualified. Scrapped Parts Situation
The hardness value required by the design is HB285~352, which is more stringent than that specified in the standard, which increases the difficulty of heat treatment
In addition, the sphere needs to be aluminized after heat treatment. However, the hardness of the solid solution + aging treatment before aluminizing has always been difficult to meet the design requirements.
At present, there is no similar process in the same industry that can make it meet the design requirements, and a new method must be invented to meet the hardness requirements while satisfying the depth of the aluminized layer

Method used

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  • gh4049 sphere aluminizing method
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Embodiment Construction

[0019] Below in conjunction with accompanying drawing, the present invention will be described in further detail:

[0020] Such as figure 1 and 2 As shown, the traditional heat treatment scheme is to first figure 1 The rough blank shown (the cross-sectional diameter of the round bar blank is Ф14mm, the length is 500mm, the chemical composition of the blank is as follows image 3 Shown) for solid solution + aging treatment, to ensure the hardness HB285 ~ 352, after the parts are processed to figure 2 When the shape is shown (the diameter of the spherical surface D is Ф10mm, and the distance between a pair of parallel planes is 6.4mm), then carry out aluminizing. The disadvantage is that the hardness of the parts and the depth of the aluminized layer will be affected during the subsequent aluminizing, and the required hardness value and depth of the aluminized layer will not be reached.

[0021] The heat treatment method of the present invention has broken the train of thou...

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Abstract

The invention discloses an aluminizing method of a GH4049 ball. The aluminizing method comprises the steps of firstly, carrying out solid solution treatment on a GH4049 blank; then, processing the blank subjected to solid solution treatment into a semi-finished product with a spherical surface D; and finally, carrying out aging treatment on the entire semi-finished product while carrying out aluminizing on the spherical surface D of the semi-finished product at the aging temperature. According to the aluminizing method, the hardness is guaranteed to reach HB285 to HB352 while the depth of an aluminized layer is guaranteed to be 30 [mu]m to 50 [mu]m.

Description

technical field [0001] The invention belongs to the technical field of aluminizing, and in particular relates to a GH4049 sphere aluminizing method. Background technique [0002] Such as figure 1 and 2 As shown, in the development process of an aero-engine, the design drawing requires the hardness of the sphere (material GH4049) to be HB285-352, and the spherical surface D is aluminized to a depth of 30μm-50μm. [0003] GH4049 is a complex alloyed nickel-based hard-to-deform superalloy. After heat treatment using the heat treatment system corresponding to the hardness value range HB302-363 specified in the standard, it is difficult to guarantee the hardness value in this range, and often rework is still unqualified. The condition of scrapped parts. The hardness value required by the design is HB285-352, which is more stringent than that stipulated in the standard, which increases the difficulty of heat treatment. Moreover, aluminizing is required after the heat treatment...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/10C23C10/50
CPCC22F1/10C23C10/50
Inventor 韦芙丹林发仙翟辉赖道辉曹卫舒琴
Owner CHINA HANGFA GUIZHOU LIYANG AVIATION POWER CO LTD
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