Crack control and forming method for large and medium-sized GH141 alloy annular forged piece

A technology for GH141 and ring forgings, which is applied in the field of forging thermal processing, and can solve problems such as easy cracking, product scrapping, and heavy grinding workload.

Inactive Publication Date: 2017-05-24
SHAANXI HONGYUAN AVIATION FORGING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: the forging process of large and medium-sized GH141 alloy ring forgings is prone to cracking, the workload of grinding is large, and the product is even scrapped, resulting in a great waste of resources

Method used

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Embodiment Construction

[0024] Below in conjunction with embodiment technical solution of the present invention will be described in further detail:

[0025] The large-scale GH4169 alloy direct aging disk forging described in the present invention, part size Material: GH141, category Ⅲ, process regulations require blanking specifications: Weight: 202kg. outer diameter the inside diameter of The projected area is about 0.25m2. The overall performance index and grain size requirements of the forgings should meet the requirements of the xx-0515 standard for the grain size to be grade 10.

[0026] The forging steps are detailed as follows:

[0027] Step 1: Convert the specification to The batch machine adds both ends; helps the roughness Ra3.2; and chamfers R10; conducts surface quality inspection,

[0028] Step two: Put the batch material into the electric furnace at ≤900°C and preheat the furnace at 900°C and 1050°C for 200 minutes respectively, then raise the temperature to 1130°C for 1...

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Abstract

The invention relates to a crack control and forming method for a large and medium-sized GH141 alloy annular forged piece. The method includes the following specific steps that first, feeding control is performed, a blank is required to be a turning material, the degree of finish is Ra3.2-Ra6.3, the end face chamfer is R5-R10, the blank is subjected to surface inspection, and crack hidden danger is eliminated; second, tool control is conducted; third, heating control is carried out, and the blank is covered with silicate or quartz sand; fourth, discharging transfer control is performed; fifth, the forging process is controlled; sixth, the final forging temperature is controlled, and the terminal temperature is higher than or equal to 950 DEG C and is controlled above a recrystallization temperature; and seventh, cooling control is conducted, and wind sheltering air cooling is performed. According to the crack control and forming method, by refining the control requirements of all stages in the forging process, control capacity is enhanced, and the problem that the large and medium-sized GH141 alloy annular forged piece is prone to cracking is solved.

Description

technical field [0001] The invention belongs to the field of forging thermal processing, and relates to a forming method for preventing cracks in the forging process of large and medium-sized GH141 alloy ring forgings. Background technique [0002] GH141 alloy is a precipitation-hardening nickel-based deformation superalloy, the main strengthening phase is γ' and carbide, and it has high tensile, yield, fatigue, durability, creep strength and good resistance in the range of 650-900 °C. Oxidation properties. It is suitable for the manufacture of high-temperature components of aviation and aerospace engines that require high strength below 870°C and anti-oxidation below 980°C. Due to the high content of aluminum, titanium, and molybdenum in the alloy, the plasticity and forgeability are extremely poor. It is a difficult-to-deform superalloy, and it is difficult to forge and prone to strain aging cracks. [0003] Since the degree of alloying of GH141 is the highest among hard...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21K1/76
CPCB21K1/761
Inventor 李鹏郑刚姚彦军
Owner SHAANXI HONGYUAN AVIATION FORGING
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