Heat treatment method of aluminium alloy sleeper beam material

A heat treatment method and aluminum alloy technology, applied in the field of heat treatment, can solve the problems of harsh working conditions, difficult manufacturing, dependence on imports, etc., and achieve the effect of excellent comprehensive mechanical properties and increased elongation

Active Publication Date: 2015-04-08
INST OF METAL RESEARCH - CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is precisely because the corbel beam is a large-scale pressed aluminum alloy casting, the working conditions are harsh, the internal quality requirements are high, and the manufacturing is difficult. Limited by equipment conditions and technical conditions, the domestic production technology has not yet been mastered, so all rely on imports

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] In this embodiment, the grade of the aluminum alloy corbel is: AlSi7Mg0.3 in the DIN EN1706 standard, which is equivalent to the domestic aluminum alloy grade ZAlSi7MgA. Performance heat treatment is carried out on the corbel test piece, so that the corbel material has a better comprehensive mechanical property. The steps of heat treatment are as follows: firstly carry out solution treatment, the solution temperature is 530°C, and the solution time is 8h, then water quenching treatment is carried out in 65°C water, the treatment time is 40min, and finally aging treatment is carried out, the aging temperature is 170°C, and the aging time for 5h. Tensile samples were taken from the bolster parts after heat treatment of the above properties, and the test results were: yield strength 250MPa, tensile strength 275MPa, elongation 2%. The above heat treatment methods for the corbel beam can ensure that the corbel beam has better comprehensive mechanical properties and meet the...

Embodiment 2

[0018] In this embodiment, the grade of the aluminum alloy corbel is: AlSi7Mg0.3 in the DIN EN1706 standard, which is equivalent to the domestic aluminum alloy grade ZAlSi7MgA. Performance heat treatment is carried out on the corbel test piece, so that the corbel material has a better comprehensive mechanical property. The steps of heat treatment are as follows: firstly carry out solid solution treatment, the solution temperature is 540°C, and the solution time is 10h, then water quenching treatment is carried out in 75°C water, the treatment time is 50min, and finally aging treatment is carried out, the aging temperature is 158°C, and the aging time for 4h. Tensile samples were taken from the bolster parts after heat treatment of the above properties, and the test results were: yield strength 215MPa, tensile strength 265MPa, elongation 4%. The above heat treatment methods for the corbel beam can ensure that the corbel beam has better comprehensive mechanical properties and m...

Embodiment 3

[0021] In this embodiment, the grade of the aluminum alloy corbel is: AlSi7Mg0.3 in the DIN EN1706 standard, which is equivalent to the domestic aluminum alloy grade ZAlSi7MgA. Performance heat treatment is carried out on the corbel test piece, so that the corbel material has a better comprehensive mechanical property. The steps of heat treatment are as follows: firstly carry out solution treatment, the solution temperature is 535°C, the solution time is 9h, then water quenching treatment is carried out in 80°C water, the treatment time is 60min, and finally aging treatment is carried out, the aging temperature is 165°C, and the aging time for 4h. Tensile samples were taken from the bolster parts after heat treatment of the above properties, and the test results were: yield strength 220MPa, tensile strength 270MPa, elongation 3%. The above heat treatment methods for the corbel beam can ensure that the corbel beam has better comprehensive mechanical properties and meet the des...

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Abstract

The invention relates to the field of heat treatment, in particular to a heat treatment method of an aluminium alloy sleeper beam material. The sleeper beam material has excellent comprehensive mechanical performance to meet the requirement of sleeper beam fatigue test, and ensures that the sleeper beam is not cracked when loaded in a car. The heat treatment method comprises the following steps: at first, the solution treatment is carried out on the aluminium alloy sleeper beam, then the aluminium alloy sleeper beam is water quenched, and finally, the aluminium alloy sleeper beam is subjected to aging treatment, wherein the sleeper beam material has yield strength of larger than or equal to 190 MPa, tensile strength of larger than or equal to 230 MPa, and elongation of larger than or equal to 2%.

Description

technical field [0001] The invention relates to the field of heat treatment, in particular to a heat treatment method for an aluminum alloy corbel material. Background technique [0002] The 350km / h EMU aluminum alloy bolster has a length of 3150mm, a width of 1350mm, and a net weight of 660kg. It is a large aluminum alloy casting; at the same time, the bolster is a box-type casting with a complete cavity in the middle, which is the air storage chamber of the air spring. , The working pressure is 6bar, so the corbel belongs to the pressure casting. The corbel bears the weight of the entire car body. During the operation of the vehicle, it is subjected to alternating loads as the vehicle bumps, so the corbel is also a stressed casting. It is precisely because the corbel is a large-scale pressed aluminum alloy casting, the working conditions are harsh, the internal quality requirements are high, and the manufacturing is difficult. Due to the limitations of equipment and techn...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/04
Inventor 刘宏伟夏立军石军王永胜傅排先康秀红李殿中包卫平李依依
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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