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Forging method for improving flaw detection bottom losses of GH4169 alloy die forgings

A GH4169, die forging technology, applied in the field of forging hot processing, can solve the problems of waste of resources, excessive bottom loss, products can not meet the needs of users, etc., to achieve the effect of improving product yield

Inactive Publication Date: 2018-07-06
SHAANXI HONGYUAN AVIATION FORGING
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Problems solved by technology

[0004] Due to the different requirements for flaw detection of GH4169 alloy forgings, the flaw detection inspection is carried out after rough machining of the forgings, and the bottom damage exceeds the standard, so that the product cannot meet the needs of users, resulting in product scrapping and a great waste of resources

Method used

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  • Forging method for improving flaw detection bottom losses of GH4169 alloy die forgings
  • Forging method for improving flaw detection bottom losses of GH4169 alloy die forgings

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[0030] For the high-pressure turbine rear axle described in the present invention, the size and shape of the forging are as follows: figure 2 ;Material: GH4169, category Ⅱ, process specification requires blanking specification: φ220×371, weight: 96Kg, the overall performance index of the forging and the low-damage requirements of flaw detection should meet the requirements of the Q / S10-0313 standard.

[0031] The forging steps are detailed as follows:

[0032] The first step: put the φ200×371mm billet into the electric furnace ≤700°C and heat it up to 850°C for 150 minutes, then heat it to 1010°C for 150 minutes at high temperature, and prefabricate the cake blank to H=170mm (completed by 1 fire), and the shape is as follows figure 1 ;

[0033] The second step: car prefabricated biscuit to H 1 =162mm;

[0034] The third step: the bottom damage inspection of flaw detection, according to the requirements of Q / S10-0313 standard;

[0035] Step 4: Put the inspected prefabricat...

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Abstract

The invention belongs to the field of forging heat machining, and relates to a molding method which meets flaw detection bottom loss physicochemical testing and is used for GH4169 alloy die forgings.According to the method, a prefabricated biscuit is subject to single hitting texture control, then biscuit machining is carried out, biscuit flaw detection bottom loss checking is carried out, and finally die forging molding is carried out; and the deformation amount is singly controlled in the above forging links, the prefabricated biscuit deformation amount is maximum, and the die forging deformation amount is minimum. According to the molding method of the GH4169 alloy die forgings, through temperature control, forging production heating number control and control over all-link technological parameters including temperature, forging time, deformation amount, the hammering number and hammering time in particular, the deformation amount is coincident with that required by bottom loss checking, the product finally meets the needed requirement, and the finished product rate of the product is effectively improved.

Description

technical field [0001] The invention belongs to the field of forging thermal processing, and relates to a forming method for a GH4169 alloy die forging conforming to physical and chemical tests for flaw detection and bottom damage. Background technique [0002] GH4169 alloy (American brand IN718 alloy, French brand NC19FeNb) is a precipitation-hardened nickel-based deformation superalloy with body-centered cubic γ′ phase and face-centered cubic γ′ phase. The alloy has excellent high temperature strength in the range below 650°C, good fatigue performance, fracture toughness, oxidation resistance and thermal corrosion resistance and other comprehensive properties, and through the change of thermal deformation process parameters, different grain sizes and different Strong forgings. [0003] At present, GH4169 alloy has become an irreplaceable material for the hot end parts of gas turbine engines for military and civilian use. In China, it is generally produced by press forging...

Claims

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Application Information

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IPC IPC(8): B21J5/02B21J1/06B21J1/04
CPCB21J1/04B21J1/06B21J5/02
Inventor 武洋斌唐军姚彦军薛强蒲光张宁娜
Owner SHAANXI HONGYUAN AVIATION FORGING
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