Production technology of aluminum alloy sections used for brake pad

A technology for aluminum alloy profiles and production processes, which is applied in the field of metal machining and can solve the problems of high cooling strength and the like

Inactive Publication Date: 2013-05-15
龙口市丛林铝材有限公司
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

However, in water-cooled semi-continuous casting, due to the high cooling intensity, the β-Si phase

Method used

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  • Production technology of aluminum alloy sections used for brake pad
  • Production technology of aluminum alloy sections used for brake pad
  • Production technology of aluminum alloy sections used for brake pad

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Embodiment Construction

[0027] The present invention is used for the production process of brake pad aluminum alloy profile, and it comprises the following steps:

[0028] (1) Ingredients: 40% of the 99.70 brand aluminum ingot and 60% of the 6-series alloy scrap are used as the substrate. When adding elements, the Al-Si intermediate alloy with a low melting point is easy to melt, and the Al-Si containing 20% ​​of Si is used as the intermediate Alloys are added, Cu and Mg are added in the form of pure metals, and Cr and Ti are added in the form of metal additives;

[0029] (2) Melting process: A 22-ton regenerative natural gas furnace is used for melting, and the melting temperature should generally be selected at 50°C-100°C higher than the liquid phase of the alloy according to theory. However, in order to prevent the production of primary silicon during the melting process, melting The temperature should be relatively high, so it is selected at 730°C-750°C. In order to ensure the chemical compositio...

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Abstract

The invention discloses a production technology of aluminum alloy sections used for a brake pad, and belongs to the technical field of metal mechanical machining. The machining of vehicle bumper aluminum alloy sections is finished through the following processes of: preparing materials, smelting, stirring with a permanent magnet, sampling, adjusting ingredients and temperature, turning down, refining (primary purification), standing, adding Al-Ti-B silk in an on-line manner, performing on-line degassing and deslagging (secondary purification), performing two-stage filtering, performing hot top casting at the same level, homogenizing an ingot, mechanically machining the ingot, heating the ingot with an induction furnace, extruding, performing on-line quenching, stretching and straightening, aging, detecting the structure and performance of the sections and carrying out delivery. The aluminum alloy sections machined by the invention is good in abrasion resistance and corrosion resistance, stale in dimension, resistant to high temperature, high in strength, good in fatigue resistance performance and long in service life.

Description

technical field [0001] The invention relates to metal machining, in particular to a process for producing aluminum alloy profiles for brake pads. Background technique [0002] NK61N aluminum alloy profiles have good wear resistance, corrosion resistance, stable size, high temperature resistance, high strength, good fatigue resistance, long service life, etc., and are used to make automobile brake pads. The alloy is a eutectic alloy containing Al, Si, Mg and Cu elements. Si is the main element of the alloy, ω (Si) = 2.7% -3.3%, Si in the alloy mainly in the eutectic of α (Al) + Si and β (Al 3 Exist in the form of FeSi). Due to the relatively high content of Si, the melt of the alloy has good fluidity and casting performance, and at the same time, the strength and wear resistance of the alloy are also improved. Cu: In the alloy, ω(Cu)=0.20%-0.30%, it can form CuAl in the alloy 2 Strengthening phase to increase the strength of the alloy. Mg: In the alloy, ω(Mg)=0.80%-0.95%...

Claims

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Application Information

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IPC IPC(8): C22C1/03C22C1/06C22C21/00C22F1/04
Inventor 张培良王刚高安江李瑞清孙文超苏本显
Owner 龙口市丛林铝材有限公司
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