Forging method for fine-grain disc part made of GH4169 material

A GH4169, fine-grained technology, applied in the field of forging, can solve the problems of coarse-grained, scrapped, and inconspicuous effects on the surface of forgings, and achieve the effects of improving mechanical properties, reducing deformation dead zones, and improving the uniformity of die forging deformation

Pending Publication Date: 2022-03-11
SHAANXI HONGYUAN AVIATION FORGING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the forging method of GH4169 alloy disc parts, the conventional method is free forging, upsetting cake, die forging, but the dead zone of deformation existing in upsetting cake and die forging, and the part with low temperature contacting tooling and mold, the degree of dynamic recrystallization is low , there will be elongated crystals and large grains, which cannot meet the standard requirements. The existing technology, such as CN103465027B, adopts the measures of asbestos sheathing during heating and preheating metal pad insulation during upsetting to improve the temperature difference and heat preservation of upsetting cakes. Uneven deformation; In actual production, when these measures are used to produce small plates with a mass of 25-70kg, the effect is not obvious, and a large number of forging surface coarse grains appear, resulting in scrapping

Method used

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  • Forging method for fine-grain disc part made of GH4169 material
  • Forging method for fine-grain disc part made of GH4169 material
  • Forging method for fine-grain disc part made of GH4169 material

Examples

Experimental program
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Effect test

Embodiment 1

[0052] A method for forging a fine-grain disc piece made of GH4169. The main forging process is: bar upsetting—machine positioning table—die forging—rough machining before heat treatment—heat treatment—physics and chemistry—machining— -flaw detection; the forging produced by this embodiment is as attached image 3 As shown; the program controls the forging heating temperature and uses deform to reversely track the deformation of the coarse-grained part during upsetting, and takes this as the critical deformation. In order to obtain qualified organizations, the key steps in the forging process are now detailed as follows:

[0053] Bar upsetting: The heating temperature is set at 1005°C. When transferring and upsetting the bar, add insulation cotton up and down, and control the forging speed to ≤10mm / s. By controlling the forging parameters, take insulation measures to reduce the generation of coarse-grained areas ;

[0054] Machining positioning table: During free upsetting, ...

Embodiment 2

[0058] On the basis of Example 1, the improvement is mainly reflected in the bar upsetting stage, which is described in detail as follows: the bar upsetting is divided into two fires, and the closed upsetting tire mold is used for upsetting. Fire, the bar is freely upsetting, without rounding, the gap between the bulging part of the bar and the inner wall of the upsetting sleeve in the closed upsetting tire mold 1 used later is ≤15mm, which is convenient for the positioning of the second fire; Second fire, use as attached figure 1 The closed upsetting tire mold shown in the figure upsetting the bar to the required size of the biscuit. Using this method to make barren can firstly reduce the dead zone of upsetting deformation to the greatest extent, and secondly save raw materials and simplify the process , which is mainly reflected in the following two aspects: on the one hand, because the closed upsetting tire mold is used, there is no waste such as burrs; Machining; what nee...

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Abstract

The invention belongs to the technical field of forging, and particularly relates to a forging method for a fine-grain disc part made of GH4169. Comprising the following steps that a bar is placed on a free forging press to be upset, a cake blank needed by die forging is manufactured, and during upsetting, heat preservation cotton needs to be padded on the upper end face and the lower end face of the bar; a positioning table is machined, so that positioning during die forging is facilitated; die forging is conducted on the machined cake blank through a die attached to the contour of the forge piece, and when the cake blank is heated, heat preservation cotton needs to be used for conducting soft wrapping; the forge piece is machined according to a rough machining drawing before heat treatment of the forge piece, and the rough machining drawing before heat treatment of the forge piece is obtained by adding 5 mm to a single face of an inner hole part on the basis of a final delivery drawing of the forge piece; the forge piece is subjected to heat treatment, the used heat treatment system is solid solution and aging, the solid solution temperature is 975 DEG C, the solid solution time is 60 min, the aging temperature is 720 DEG C, and the aging time is 480 min; and carrying out physicochemical treatment, machining and flaw detection to obtain the target GH4169 alloy fine-grain disc part.

Description

technical field [0001] The invention belongs to the technical field of forging, and in particular relates to a forging method of a fine-grain disk piece whose material is GH4169. Background technique [0002] GH4169 alloy is a precipitated nickel-chromium-iron-based superalloy, and the grain structure state of the alloy is particularly sensitive to changes in thermal deformation process parameters. For the forging method of GH4169 alloy disc parts, the conventional method is free forging, upsetting cake, die forging, but the dead zone of deformation existing in upsetting cake and die forging, and the part with low temperature contacting tooling and mold, the degree of dynamic recrystallization is low , there will be elongated crystals and large grains, which cannot meet the standard requirements. The existing technology, such as CN103465027B, adopts the measures of asbestos sheathing during heating and preheating metal pad insulation during upsetting to improve the temperatu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21K1/32B21J5/00B21J5/02B21J5/08B21J13/02C21D9/00
CPCB21K1/32B21J5/002B21J5/02B21J5/08B21J13/02C21D9/0068
Inventor 杨澜何敏高超平田淼段元
Owner SHAANXI HONGYUAN AVIATION FORGING
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