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Forging method and device for controlling die-forging warping through long-rod-type forge piece

A long rod forging and die forging technology, applied in the field of forging hot processing, can solve the problems of waste of resources, products that cannot meet the needs of users, and excessive warpage, and achieve the effect of improving the yield of products.

Active Publication Date: 2019-04-16
SHAANXI HONGYUAN AVIATION FORGING
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the different warpage requirements of 300M alloy forgings, the forgings are inspected after rough machining, and the warpage exceeds the standard, which makes the product unable to meet the needs of users, resulting in product scrapping and a great waste of resources

Method used

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specific Embodiment

[0049] Slide tube forging according to the present invention, material: 300M, category I, process specification requires blanking specification: Φ260×647mm, weight: 270Kg, overall performance index and flaw detection requirements of forging should meet special technical requirements.

[0050] The forging steps are detailed as follows:

[0051] The first step: put the Φ260×647mm billet into the natural gas furnace ≤700℃ and heat it up to 1130℃ for 75min, the first fire is completed, and the cooling method is stack cooling;

[0052] Step 2: After inspection, the barren type is put into the natural gas furnace ≤700°C and heated to 1130°C for 75 minutes, and then die forging is performed. After the die forging, the vertical dimension Φ140mm is controlled to Φ145~Φ148mm, and the cooling method is box cooling. Forging to forging height dimension;

[0053] The third step: enter the natural gas furnace ≤ 700 ℃ and heat up to 1110 ℃ for 75 minutes, then carry out the second fire of di...

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Abstract

The embodiment of the invention provides a forging method and device for controlling die-forging warping through a long-rod-type forge piece. The forging method comprises the steps that after a preformed blank is fixed into a die required by forging equipment, the preformed blank is continuously hammered by n times under the working air pressure effect of the forging equipment, and then an intermediate blank is obtained; the preformed blank is obtained by secondarily heating and forging bar materials; n is a positive integer; under the working air pressure effect, the intermediate blank is hammered by m times, and thus a required forge piece is obtained; m is a positive integer; and the forge piece is slowly cooled. According to the forging method and device for controlling die-forging warping through the long-rod-type forge piece, great resource waste caused by the fact that products are scrapped due to unqualified wrapping can be reduced.

Description

technical field [0001] The invention belongs to the field of forging thermal processing, and relates to a forging method and device for controlling die forging warpage of long-rod forgings. Background technique [0002] 300M steel is a low-alloy ultra-high-strength steel developed by the International Nickel Company in 1952, also known as 4340M, Trccent. In 1964, it began to be applied to the landing gear of the US C-5A large military transport aircraft. In the 1960s, it was popularized and applied with other models. 300M steel has become the steel for landing gear with the highest strength, best comprehensive performance, widest application and best reputation in the world. Its mechanical properties have the advantages of high strength, high transverse plasticity, high fracture toughness, excellent fatigue performance and good corrosion resistance. In the mid-1980s, our country began to imitate according to the American aerospace material standard AMS6417, and passed the...

Claims

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Application Information

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IPC IPC(8): B21J5/00
CPCB21J5/00
Inventor 黄大卫朱娟娟武洋斌姚彦军
Owner SHAANXI HONGYUAN AVIATION FORGING
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