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Preparation method of 6-series aluminum alloy precision casting quenching plate

A precision casting and aluminum alloy ingot casting technology, which is applied in the field of aluminum alloy, can solve the problems of limiting the development space of aluminum alloy precision casting plates, incomplete internal stress release, and failure to satisfy customers, etc., to achieve low internal stress and fine grain structure The effect of uniformity and streamlining of the preparation process

Inactive Publication Date: 2019-04-05
广西南南铝加工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the aluminum alloy precision casting plates are mainly 5 series aluminum alloys, such as 5083 and 5052. The disadvantages of the current production of 5052, 5083 and other Al-Mg alloy precision casting plates are as follows: the overall strength of the casting plate is low, which cannot meet the requirements of customers for higher strength. The requirements of precision instruments severely limit the development space of aluminum alloy precision casting plates; long-term medium and low temperature homogenization heat treatment and precise control of heating and cooling rates are required. Improper control may easily lead to incomplete release of internal stress and processing deformation

Method used

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  • Preparation method of 6-series aluminum alloy precision casting quenching plate
  • Preparation method of 6-series aluminum alloy precision casting quenching plate
  • Preparation method of 6-series aluminum alloy precision casting quenching plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] 1. Melting 6061 aluminum alloy, the composition is as A1 in Table 1. After degassing and filtering, the hydrogen content is 0.18ml / 100gAl, and semi-continuous casting is carried out to cast a flat ingot with a size of 450*1550*6000mm.

[0039] 2. Turn the four sides and one side of the cast ingot to 5mm, remove the casting segregation layer, cut and rough mill the surface into a 50*1530*6000mm plate.

[0040] 3. The plate obtained by rough milling is subjected to solution quenching, the heating rate is 10°C / min, the temperature is raised to 500°C, and the temperature is kept for 5 minutes.

[0041] 4. Stretch the above-mentioned quenched plate, the stretching rate is 15 mm / min, and the stretching rate is 1.5%.

[0042] 5. Aging, aging temperature 185 ℃, heat preservation 10h.

[0043] 6. Sawing and cutting into 50*1420*5000mm, cutting into 19*1420*5000mm, sawing speed 2100m / min, sawing speed 30dm 2 / mn, 260mm / min; feeding speed 70%, 45mm / min; table speed: 60mm / mmin. ...

Embodiment 2

[0047] 1. Melting 6082 aluminum alloy, the composition is as B1 in Table 1, after degassing and filtering, the hydrogen content is 0.15ml / 100gAl, and semi-continuous casting is carried out to cast a flat ingot with a thickness of 650*2250*4500mm.

[0048] 2. Turn the four sides and one side of the cast ingot to 15mm, remove the casting segregation layer, cut and mill the surface into 100*2220*4500mm.

[0049] 3. Perform solution quenching on the slit plates at a heating rate of 50°C / min, raise the temperature to 550°C, and keep it warm for 150 minutes. After the heat preservation is completed, perform rapid high-pressure water quenching at a cooling rate of 32°C / s, and cool to room temperature.

[0050] 4. Stretch the above-mentioned quenched plate, the stretching rate is 6mm / min, and the stretching rate is 2.1%;

[0051] 5. Aging, aging temperature 172 ℃, heat preservation 15h;

[0052] 6. Sawing and cutting into 100*2100*3500mm, cutting into 23*2100*3500mm, sawing speed 250...

Embodiment 3

[0056] 1. Melting 6013 aluminum alloy, the composition is as C1 in Table 1, after degassing and filtering, the hydrogen content is 0.10ml / 100gAl, carry out semi-continuous casting, and cast a flat ingot with a thickness of 650*1850*4000mm.

[0057] 2. Turn the four sides and one side of the cast ingot to 20mm, remove the casting segregation layer, cut and mill the surface into 210*1830*4000mm.

[0058] 3. Perform solution quenching on the slit plates at a heating rate of 120°C / min, raise the temperature to 580°C, and keep warm for 300 minutes. After the heat preservation is completed, perform rapid high-pressure water quenching, cooling at a rate of 10°C / s, and cool to room temperature.

[0059] 4. Stretch the above-mentioned quenched plate, the stretching rate is 1.5mm / min, and the stretching rate is 3.0%;

[0060] 5. Aging, aging temperature 160 ℃, heat preservation 25h;

[0061] 6. Sawing and cutting into 210*1700*3000mm, cutting into 10*1700*3000mm, sawing speed 1600m / min...

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Abstract

The invention relates to the technical field of aluminum alloys, in particular to a preparation method of a 6-series aluminum alloy precision casting quenching plate. The preparation method of the 6-series aluminum alloy precision casting quenching plate comprises the steps that an aluminum alloy cast ingot is smelted and cast, and chemical components in the aluminum alloy cast ingot comprise, bymass percent, 0.4-1.3 of Si, not larger than 0.7 of Fe, not larger than 1.1 of Cu, not larger than 1.0 of Mn, 0.4-1.2 of Mg, not larger than 0.35 of Cr, not larger than 0.25 of Zn, not larger than 0.15 of Ti and the balance Al and inevitable impurities; and the obtained aluminum alloy cast ingot is subjected to slitting, solution quenching, stretching and ageing to obtain an aluminum alloy finished product. The product obtained through the preparation method is tiny and uniform in structure, a rolling structure is avoided, the cast grain structure is kept, internal stress is extremely low, andthe strength of the casting plate is improved. In addition, by means of the heat treatment process, the grain structure, the precipitated phase size, the precipitation quantity and the precipitationposition in an alloy are controlled well, and the strength of the casting plate product is improved to a large degree.

Description

technical field [0001] The invention relates to the technical field of aluminum alloys, in particular to a method for preparing a 6-series aluminum alloy precision casting quenching plate. Background technique [0002] Aluminum alloy precision casting plate is a new type of aluminum alloy product that is applied only after heat treatment and machining without hot rolling after casting. At present, this product is widely used in transportation, machinery and electronics, molds, high-end precision instruments, etc. field. Compared with steel, the advantages of aluminum alloy precision casting plates are as follows: (1) The density is small, and the density of aluminum is only about one-third of that of steel, so aluminum alloy is more suitable for the lightweight requirements of the current industrial field; (2) ) High thermal conductivity, the thermal conductivity of aluminum alloy is about 4 times that of steel, the cooling cycle can be significantly shortened during proces...

Claims

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Application Information

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IPC IPC(8): C22F1/04C22F1/05C22F1/057C22C1/02
CPCC22C1/026C22F1/04C22F1/05C22F1/057
Inventor 赵启忠何建贤莫宇飞韦孙飞邓松云曹宇任月路
Owner 广西南南铝加工有限公司
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