Preparing method of high-pressure shell aluminum alloy die forging for submersible

A technology of aluminum alloy molds and submersibles, applied in metal processing equipment, manufacturing tools, forging/pressing/hammer devices, etc., can solve the problems of stress corrosion resistance, poor strength and fracture toughness, etc., and achieve the purpose of improving the service life Effect

Active Publication Date: 2018-04-20
NORTHEAST LIGHT ALLOY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of poor stress corrosion resistance, strength and fracture toughness of high-pressure shell die forgings for submersibles, and provide a preparation method for high-pressure shell aluminum alloy die forgings for submersibles

Method used

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  • Preparing method of high-pressure shell aluminum alloy die forging for submersible
  • Preparing method of high-pressure shell aluminum alloy die forging for submersible
  • Preparing method of high-pressure shell aluminum alloy die forging for submersible

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specific Embodiment approach 1

[0018] Embodiment 1: In this embodiment, the method for preparing a high-pressure shell aluminum alloy die forging for a submersible is carried out according to the following steps:

[0019] 1. Heating of aluminum alloy ingot:

[0020] Clean the thimble hole on the round aluminum alloy ingot of Ф350mm×600mm. The heating temperature of the ingot is 420°C-450°C, keep it warm for 4-8 hours, and then cool down to 380°C-400°C in the furnace for forging. ;

[0021] 3. Blanks for forging die forging

[0022] When the ingot in step 1 comes out of the furnace, the temperature of the ingot is forged. Long, round bar forged to Ф290, cut evenly along the axis direction to get the blank;

[0023] 3. Heat the blank to a temperature of 400°C-450°C, and then carry out lubricating molding three times under the condition that the flat anvil forging temperature is 380°C-420°C, and the forging temperature of a 10,000-ton vertical molding press is 400°C-450°C Forming to obtain forgings;

[00...

specific Embodiment approach 2

[0028] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the mass percentage of elements in the aluminum alloy ingot described in step 1 is:

[0029] Si is ≤0.5%, Fe is ≤0.5%, Cu is 1.2%-2.0%, Mn is 0.15%-0.30%, Mg is 2.0%-3.0%, Zr is 0.16%-0.30%, Zn is 5.1-6.1% , Ti is ≤0.10%, single impurity ≤0.05%, total impurity ≤0.10%, and the rest is Al;

[0030] The aluminum alloy ingot is subjected to double-stage filtration and double-stage degassing, and the liquid hydrogen content is ≤0.18ml / 100g. Others are the same as the first embodiment.

specific Embodiment approach 3

[0031] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that in Step 1, the aluminum alloy ingot is heated to a temperature of 430° C. to 445° C. and kept for 4.5 hours. Others are the same as those in Embodiment 1 or 2.

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Abstract

The invention relates to a preparing method of a high-pressure shell aluminum alloy die forging for a submersible, and is applied to the aluminum alloy forging field. The method aims at solving the problems that the high-pressure shell aluminum alloy die forging for the submersible is poor in stress corrosion resistance, strength and breaking toughness. The method comprises the steps of firstly, aluminum alloy casting ingot heating, secondly, forging of a workblank for die forging molding, thirdly, lubricating mold pressing molding to obtain the forging, fourthly, corrosive washing and degreasing of the forging formed through die forming and neutralizing and whitening of the forging in an acid tank, fifthly, heat treatment and sixthly, metallographic structure detection and performance detection of the die forging obtained after heat treatment, and detection of qualified die forging. The standard requirements can be met, the pressure resistance of the shell is improved, strength, breaking toughness and other properties of the high-pressure die forging for the submersible can be improved, and the service life of the shell is prolonged.

Description

technical field [0001] The invention relates to a method for preparing a high-pressure shell aluminum alloy die forging for a submersible. Background technique [0002] With the development of my country's navigation industry, the performance requirements of submarines are getting higher and higher. The shell forgings in submarines are the main force-bearing components. The shells are required to have high stress corrosion resistance, high strength and fracture toughness. Longitudinal resistance The tensile strength is ≥535MPa, the yield strength is ≥450MPa, and the elongation is ≥10%. A die forging with high structural strength, good stress corrosion resistance, and good fracture toughness has been developed to meet the needs of navigation development and improve the safety of submersible shells. The service life can enable our country to gradually master similar technologies and lay the foundation for reducing the manufacturing cost of submersibles. Contents of the inventi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21J5/06B21K29/00C23G1/22C23G1/12C22F1/04C22C21/10C22F1/053
CPCB21J5/06B21K29/00C22C21/10C22F1/04C22F1/053C23G1/125C23G1/22
Inventor 姜春艳高新宇王洪军张诗泽高永强徐磊
Owner NORTHEAST LIGHT ALLOY CO LTD
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