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[CN 201811519873.8] Method of Forging Hammer Core Forgings of Large Hydraulic Press with 32Mn1 Steel
[CN 201811519873.8] Method Title of Forging Hammer Core Forgings of Large Hydraulic Press with 32Mn1 Steel: Method of Forging Hammer Core Forgings of Large Hydraulic Press with 32Mn1 Steel Application Number: CN 201811519873.8 Applicant: Wuhan Heavy Industry Casting and Forging Co., Ltd. Application Date: 2018-12-12 Patent Type: Invention Application The present invention relates to a method of forging hammer core forgings of large hydraulic press with 32Mn1 steel. Red feed ingot oxygen cut ingot; press Φ800mm-Φ900mm pliers to remove residual materials from riser, wear cap for upsetting, draw and shape, and smooth end face; Normalizing treatment is divided into three stages: 550 ℃ ~ 600 ℃ for 3 hours, 630 ℃ ~ 670 ℃ for 3 hours; 850 ℃ ~ 910 ℃ for 6 hours, then air cooling to 350 ℃ ~ 400 ℃; Tempering, 600 ℃ ~ 670 ℃, heat preservation for 8.5 hours; Then the furnace is cooled and discharged at a temperature lower than 400 ℃. After the flaw detection is qualified, the hardness of the forging body is detected on site to obtain 32Mn1 large hydraulic machine hammer core material. The invention enables the forging to meet the technical requirements of the hammer core forging by adjusting the composition of C and Mn elements and a reasonable heat treatment method. The invention saves the amount of precious alloy and effectively reduces the production cost.
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