Method and apparatus for preventing large diameter magnesium alloy case part from heat treatment deformation

Abstract

The present invention discloses a method and an apparatus for preventing a large diameter magnesium alloy case part from heat treatment deformation. According to the method, after a processed large diameter magnesium alloy case part is placed in a heat treatment device to carry out a solid solution and aging heat treatment, a tray is firstly manufactured; a lower round disc is fixed on the tray, and an upper round disc is connected through a connection rod; a cylindrical shape large diameter magnesium alloy case part is sleeved on the lower round disc and the upper round disc, and is vertically placed on the tray, such that a gap of 0.5-4 mm is reserved between the outer cylindrical surfaces of the lower round disc and the upper round disc and the cylindrical inner wall of the large diameter magnesium alloy case part; and then the large diameter magnesium alloy case part and the tray are vertically hanged into the heat treatment device to carry out a solid solution and aging heat treatment. According to the present invention, the lower round disc and the upper round disc are respectively arranged on two ports of the large diameter magnesium alloy case part, such that large diameter magnesium alloy case part deformation generated during the heat treatment can be prevented or reduced.

Description

Technical field [0001] The invention relates to a method and a device for preventing heat treatment deformation of large-diameter magnesium alloy shell parts, and belongs to the technical field of heat treatment of magnesium alloy shell parts. Background technique [0002] At present, cast magnesium alloy shell parts are the key components of spacecraft. With the development of spacecraft technology, the diameter of cast magnesium alloy shells has become larger, and new technical requirements have been put forward for the heat treatment of the shell, especially large-diameter shell castings. The deformation control technology in the heat treatment process directly affects the qualified rate of cast magnesium alloy shells. The factors that affect the deformation of large-diameter cast magnesium alloy shells generally include: solution and aging heat treatment temperature, casting method, heat treatment equipment of parts Clip method, etc. According to the conventional magnesium a...

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Problems solved by technology

In accordance with conventional magnesium alloy heat treatment technical standards, optimize the combination of heat treatment temperature and furnace feeding method, and generally clamp the shell parts. When the diameter of the shell parts is small (generally less than 300mm), the heat treatment deformation can be controlled within the reserved However, when the diameter of the magnesium alloy shell is large (greater than 300mm), according to the existing heat treatment process and the traditional way of clamping, the large diameter magnesium alloy shell The shell of the part will be greatly deformed, and the deformation caused by the heat treatment will often exceed the reserved machining allowance range, which cannot meet the technical requirements, resulting in the scrapping of the part

Therefore, the existing heat treatment processing methods for large-diameter magnesium alloy shell parts are still not ideal.

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