Aluminum alloy heavy heat treatment method

A heat treatment method and technology for large forgings, applied in the field of aluminum alloy forging, can solve the problems of high heat treatment cost, low utilization rate of heat treatment furnace, no large well-type electric furnace, etc., and achieve the effect of low processing and manufacturing cost and simple device structure

Active Publication Date: 2014-10-15
GUIZHOU AEROSPACE XINLI CASTINGSAND FORGINGS
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Problems solved by technology

[0003] At present, in ferrous metal-based forging enterprises or enterprises integrating military and civilians, since the main products are mostly ferrous metal products, most of the heat treatment workshops are only equipped with trolley-type medium and high-temperature resistance furnaces and small-scale low-temperature well-type tempering furnaces. None of them are equipped with large-scale well-type electric furnaces specially used for heat treatment of aluminum alloys. However, with the increasing specifications of aluminum alloy forgings in the fields of national defense and aerospace, and the diameter of large forgings is more than 3 meters, the small low-temperature furnaces currently configur

Method used

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  • Aluminum alloy heavy heat treatment method
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  • Aluminum alloy heavy heat treatment method

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0019] Example one:

[0020] Such as figure 1 , figure 2 As shown, a heat treatment method for aluminum alloy large forgings is to first manufacture and process heat treatment heating devices, which are mainly composed of an open box body 2 and a shelf 3. The open box body 2 has a bottom and surrounding seal and an open top structure The open box 2 is set on the trolley of the trolley-type resistance furnace 1, and then the aluminum alloy forgings that need heat treatment are placed on the shelf 3. During the solution heat treatment, the open box The temperature in the body 2 rises to the heat preservation temperature, and then the shelf 3 and the forgings are put into the open box body 2 and heated to increase the temperature. After the solution heat preservation is completed, the shelf 3 is lifted out of the open box body 2. Carry out the next heat treatment process such as water cooling, air cooling, etc. If the forging needs to be aging, the temperature in the open box 2 is ...

Example Embodiment

[0024] Embodiment two:

[0025] Such as figure 1 , figure 2 , image 3 , Figure 4 Shown: A heat treatment method for frame forgings made of 2A14 (LD10). The forging dimensions are φ3010 mm×φ2725 mm×130mm. The heat treatment heating device described in Example 1 is used. The heat treatment process is solid solution plus cold deformation plus aging treatment (see image 3 ),Specifically:

[0026] Heating up: Use program control or manual control to heat up the open box 2 to the solid solution insulation temperature of the forging to 500℃. After the insulation temperature is stable, put the shelf 3 and the forging into the open box 2 and set The temperature of the car-type resistance furnace 1 is set to the lower limit of the holding temperature of 495°C, and the temperature is raised by program control or manual control. After the temperature rises to 495°C, the temperature is kept stable for a certain period of time and then rises to 500°C.

[0027] Heat preservation: heat preserva...

Example Embodiment

[0034] Embodiment three:

[0035] Such as figure 1 , figure 2 , Figure 5 , Image 6 Shown: a heat treatment method for ring-shaped forgings made of LY19, with dimensions of Φ1500mm×Φ1200mm×510mm, using the heat treatment heating device described in Example 1, and the heat treatment process is solid solution plus cold deformation plus aging treatment (see Figure 5 ),Specifically:

[0036] Heating up: Use program control or manual control to raise the temperature in the open box body 2 to the solid solution heat preservation temperature of the forging at 535℃. After the heat preservation temperature is stable, put the shelf 3 and the forging into the open box body 2 and set The temperature of the car-type resistance furnace 1 is set to the lower limit of the holding temperature of 530°C, and the temperature is raised by program control or manual control. After the temperature rises to 530°C, the temperature is kept stable for a certain period of time and then rises to 535°C.

[003...

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Abstract

The invention discloses an aluminum alloy heavy heat treatment method. The aluminum alloy heavy heat treatment method comprises manufacturing a heat treatment heating device; during solid solution heat treatment, rising the temperature inside an open type box to the heat preservation temperature, putting a shelf and a forging into the open type box to heat and rise the temperature, hanging out the shelf from the open type box when the solid solution heat treatment is achieved, performing follow-up heat treatment procedures such as water cooling and air cooling and timely putting the forging on the shelf to be hung into the open type box to be performed on aging after the temperature inside the open type box is lower than the aging temperature if the forging requires aging; annealing and performing aging heat treatment on the forging, directly hanging the forging into the open type box to enable the temperature to be raised along with that of the open type box and cooling according to technological requirements after temperature rising and heat preservation are achieved. The aluminum alloy heavy heat treatment method is simple in structure and low in manufacturing and production cost due to the fact that the existing trolley type resistance furnace is used for performing heating and temperature preservation during heat treatment of small batched aluminum alloy large forgings.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloy forging, and in particular relates to a heating and heat preservation method during heat treatment of large aluminum alloy forgings. Background technique [0002] The heat treatment methods of aluminum alloy forgings in the delivery state are: solid solution + aging, annealing, etc., due to the low solid solution, aging and annealing temperature of large aluminum alloy forgings (large forgings refer to forgings with an external size greater than 2.5m) , according to the requirements of relevant standards, it is necessary to configure large-scale well-type electric furnaces not lower than Class II (±5°C), and the number is not less than 2. [0003] At present, in ferrous metal-based forging enterprises or enterprises integrating military and civilians, since the main products are mostly ferrous metal products, most of the heat treatment workshops are only equipped with trolley-type medium an...

Claims

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Application Information

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IPC IPC(8): C22F1/04
Inventor 冷廷梅石建平
Owner GUIZHOU AEROSPACE XINLI CASTINGSAND FORGINGS
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