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Preparation method of high-low-temperature-resistant ultra-thin hollow high-speed rail aluminum profile

A technology of high and low temperature resistant aluminum profiles, applied in the field of preparation of high and low temperature resistant ultra-thin hollow high iron aluminum profiles, which can solve the problems of large extrusion deformation, low yield, easy deformation, etc.

Inactive Publication Date: 2021-04-09
ANHUI XIN FA ALUMINUM PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Hollow thin-walled aluminum profile is a common profile, and the demand in the market is also very large, but because the wall of hollow thin-walled aluminum profile is required to be thin, the amount of extrusion deformation is large, and it is easy to produce in the subsequent straightening process after discharge. Deformation, the yield of mass production is very low, the production of hollow thin-walled aluminum profiles has always been a difficult point in extrusion production, and the mass production of hollow thin-walled aluminum profiles cannot be realized according to the traditional extrusion process

Method used

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  • Preparation method of high-low-temperature-resistant ultra-thin hollow high-speed rail aluminum profile
  • Preparation method of high-low-temperature-resistant ultra-thin hollow high-speed rail aluminum profile
  • Preparation method of high-low-temperature-resistant ultra-thin hollow high-speed rail aluminum profile

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Effect test

Embodiment 1

[0024] A method for preparing high and low temperature resistant ultra-thin hollow high-speed iron aluminum profiles, comprising the following steps:

[0025] A. Preheating of the ingot cylinder, the preheating of the ingot cylinder is maintained at 428°C for 4.5 hours before extrusion;

[0026] B, aluminum alloy ingot heating, the aluminum alloy ingot is heated, and the heating temperature is 435 ℃;

[0027] C. Mold heating, send the mold into the heating furnace for heating, the heating temperature is 465°C, preheat for 2.5 hours;

[0028] D. Extrusion, the aluminum alloy ingot is sent into the ingot barrel for extrusion treatment, the feed temperature is 435°C, and the discharge temperature is 498°C;

[0029] E. Two-stage forced quenching, the obtained aluminum profile is first cooled by air cooling, the quenching cooling rate is 205°C / min, and then rapidly cooled by water mist, the quenching cooling rate is 38°C / s, and then to cut off the material;

[0030] F. Straighte...

Embodiment 2

[0041] A method for preparing high and low temperature resistant ultra-thin hollow high-speed iron aluminum profiles, comprising the following steps:

[0042] A. The ingot cylinder is preheated, and the ingot cylinder is maintained at 430°C for 4 hours before extrusion;

[0043] B, aluminum alloy ingot heating, the aluminum alloy ingot is heated, and the heating temperature is 440 ℃;

[0044] C. Mold heating, send the mold into the heating furnace for heating, the heating temperature is 450°C, preheat for 3 hours;

[0045] D. Extrusion, the aluminum alloy ingot is sent into the ingot barrel for extrusion treatment, the feed temperature is 440°C, and the discharge temperature is 490°C;

[0046] E. Two-stage forced quenching, the obtained aluminum profile is first cooled by air cooling, the quenching cooling rate is 155°C / min, and then rapidly cooled by water mist, the quenching cooling rate is 35°C / s, and then to cut off the material;

[0047] F. Straightening, place the que...

Embodiment 3

[0057] A method for preparing high and low temperature resistant ultra-thin hollow high-speed iron aluminum profiles, comprising the following steps:

[0058] A. The ingot cylinder is preheated, and the ingot cylinder is maintained at 425°C for 6 hours before extrusion;

[0059] B, aluminum alloy ingot heating, the aluminum alloy ingot is heated, and the heating temperature is 420 ℃;

[0060] C. The mold is heated, and the mold is sent into a heating furnace for heating, and the heating temperature is 480 ° C, at least 3.5 hours;

[0061] D. Extrusion, the aluminum alloy ingot is sent into the ingot barrel for extrusion treatment, the feed temperature is 420°C, and the discharge temperature is 510°C;

[0062] E. Two-stage forced quenching, the obtained aluminum profile is first cooled by air cooling, the quenching cooling rate is 230°C / min, and then rapidly cooled by water mist, the quenching cooling rate is 32°C / s, and then to cut off the material;

[0063] F. Straightening,...

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Abstract

The invention discloses a high-low-temperature-resistant ultra-thin hollow high-speed rail aluminum profile which is composed of the following components: Si, Mn, Sn, Mg, Bi, Ni, Cr and Al. Particularly, trace metal Bi (bismuth) and metal Cr (chromium) are added, so that the toughness and the high and low temperature resistance of the aluminum alloy are improved. According to a preparation method of the high-low-temperature-resistant ultra-thin hollow high-speed rail aluminum profile provided by the invention, two-stage forced quenching is adopted, so that the problem that due to the fact that water is directly used for cooling, metal fractures due to too fast cooling is avoided; and meanwhile, air is firstly used and then water is used for cooling and quenching, so that certain toughness can be reserved while the strength is improved. In addition, tiny quartz sand is adopted for conducting sand blasting on the surface of an aluminum alloy, so that the toughness of the aluminum profile is further improved. A high-low-temperature heat preservation repeated circulation treatment process is adopted, so that the adaptability of the aluminum profile to the high temperature and the low temperature can be effectively improved. In conclusion, the ultra-thin hollow aluminum profile prepared by the invention has the characteristic of high and low temperature resistance, and meets the use requirements of high-speed rails.

Description

technical field [0001] The invention relates to the technical field, in particular to a method for preparing high and low temperature resistant ultra-thin hollow high-speed iron aluminum profiles. Background technique [0002] Profiles are objects with a certain geometric shape made of iron or steel and materials with certain strength and toughness through rolling, extrusion, casting and other processes. The profile has a certain appearance size, a certain cross-section shape, and certain mechanical and physical properties. Profiles can be used alone or further processed into other manufactured products, often used in building structures and manufacturing installations. The specific shape, material, heat treatment state, mechanical properties and other parameters of the profile can be selected according to the design requirements, and then the profile can be divided according to the specific size and shape requirements, and then further processed or heat treated to meet the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/08C22F1/047
CPCC22C21/08C22F1/047C22F1/002
Inventor 赵欣泰唐开健李杰王超傅凡一贡玉楼
Owner ANHUI XIN FA ALUMINUM PROD