Unlock instant, AI-driven research and patent intelligence for your innovation.

A Grading Homogenization Process of 6005a Aluminum Alloy

A second-level homogenization, aluminum alloy technology, applied in the field of grading and homogenization of 6005A aluminum alloy, can solve problems such as difficult to eliminate and deteriorate the toughness and fatigue performance of profiles

Active Publication Date: 2020-04-17
丛林铝业科技(山东)有限责任公司 +1
View PDF14 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The homogenization processes commonly used in the actual production of 6005A alloys include primary homogenization, secondary homogenization, and high-temperature homogenization. However, it is difficult to eliminate the coarse crystalline phase and reduce or eliminate the harmful β (AlFeSi) phase. The coarse and hard needle-like β (AlFeSi) phase is easy to cause stress concentration, which significantly deteriorates the toughness and fatigue of the profile. Performance; promote high melting point to suppress fine and uniform precipitation of recrystallization phase, avoid coarse Mg in cooling stage 2 Precipitation of Si phase, reduction of coarse Mg in the homogenization cooling stage 2 The precipitation of Si phase can effectively reduce the loss of effective main alloying elements, which is beneficial to give full play to the performance of the alloy

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A Grading Homogenization Process of 6005a Aluminum Alloy
  • A Grading Homogenization Process of 6005a Aluminum Alloy
  • A Grading Homogenization Process of 6005a Aluminum Alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] like Figure 1-Figure 7 As shown, a graded homogenization process suitable for 6005A aluminum alloy, the 6005A aluminum alloy is subjected to primary and secondary homogenization heat treatment in sequence, and then it is subjected to three-stage cooling. The specific steps are as follows:

[0030] Step 1. First-level homogenization heat treatment: first put the aluminum alloy cast rods into the homogenization furnace, the details are as follows: the aluminum alloy cast rods with a diameter of 510mm should be stacked in the middle of the homogenization furnace, between layers It should be separated by iron spacers, and there should be equidistant intervals between rods and rods in the same layer, with a distance of 20mm, so that the cast rods can be evenly heated to 540-550°C, with a heating rate of 70°C / h and a heat preservation period of 5h;

[0031] Step 2. Secondary homogenization heat treatment: continue to heat up the aluminum alloy cast rod after the first-level ...

Embodiment 2

[0040] like Figure 8 As shown, the 6005A aluminum alloy is subjected to primary and secondary homogenization heat treatment in sequence, and then it is subjected to tertiary cooling. The specific steps are as follows:

[0041] Step 1. First-level homogenization heat treatment: first put the aluminum alloy cast rods into the homogenization furnace, the details are as follows: the aluminum alloy cast rods with a diameter of 300mm should be stacked in the middle of the homogenization furnace, and the layer between layers It should be separated by iron spacers, and there should be equidistant intervals between the rods on the same layer, with a distance of 60mm, so that the cast rods can be evenly heated to 540-550 ° C, the heating rate is 100 ° C / h, and the heat preservation is 3 h;

[0042] Step 2. Second-level homogenization heat treatment: continue to heat up the aluminum alloy cast rod after the first-level homogenization heat treatment to 575-585°C, and keep it warm for 5...

Embodiment 3

[0045] The difference from Example 1 is that the 6005A aluminum alloy is subjected to primary and secondary homogenization heat treatments in turn, and then subjected to tertiary cooling, the specific steps are as follows:

[0046] Step 1. First-level homogenization heat treatment: first put the aluminum alloy cast rods into the homogenization furnace, the details are as follows: the aluminum alloy cast rods with a diameter of 600mm should be stacked in the middle of the homogenization furnace, and the layer between layers It should be separated by iron spacers, and there should be equidistant intervals between rods and rods in the same layer, with a distance of 100mm, so that the cast rods can be evenly heated to 540-550 ° C, the heating rate is 85 ° C / h, and the heat preservation time is 6 h;

[0047] Step 2. Secondary homogenization heat treatment: continue to heat up the aluminum alloy cast rod after the first-level homogenization heat treatment to 575-585°C and keep it w...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
diameteraaaaaaaaaa
diameteraaaaaaaaaa
sizeaaaaaaaaaa
Login to View More

Abstract

The invention relates to a graded homogenization technology of a 6005A aluminum alloy. The 6005A aluminum alloy is sequentially subjected to first-stage and second-stage homogenization heat treatmentand third-stage cooling. The technology comprises specific steps as follows: S1, an aluminum alloy cast rod is uniformly heated to 540-550 DEG C along with a furnace at the heating rate of 70-100 DEGC / min and kept at the constant temperature for 3-6 h; step 2, the aluminum alloy cast rod obtained after first-stage homogenization heat treatment is continuously heated to 575-585 DEG C and kept at the constant temperature for 2-5 h; step 3, firstly, air cooling: the aluminum alloy cast rod is taken out of the homogenizing furnace to be subjected to air cooling for 10-20 min, then, wind cooling:the air-cooled aluminum alloy cast rod is pushed into a cooling furnace to be subjected to wind cooling for 1-2 h; finally, water cooling: the wind-cooled aluminum alloy cast rod is cooled to the roomtemperature in a water cooling manner, thick crystalline phases are eliminated, harmful beta(AlFeSi) phases are reduced or eliminated, tiny and uniform precipitation of high-molting-point recrystallization inhibiting phases is promoted, and precipitation of thick Mg2Si phases at the cooling stage is avoided.

Description

technical field [0001] The invention relates to a graded and homogenized process for aluminum alloys, in particular to a graded and homogenized process for 6005A aluminum alloys. Background technique [0002] The 6005A alloy is a heat-treatable aluminum alloy that is widely used in the field of rail transit. In order to improve the safety and stability of rail transit car bodies and prolong their service life, the industry has higher and higher requirements for material performance. In addition to meeting basic strength and plasticity indicators, 6005A car body materials need to further improve toughness, fatigue performance, corrosion resistance and other properties. Homogenization, as the first step in heat treatment of aluminum alloy materials, is both basic and particularly important. The 6005A alloy tends to form more non-equilibrium eutectic phases and coarse brittle β(AlFeSi) phases during the casting process, and the composition and structure are highly heterogeneou...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/05
CPCC22F1/05
Inventor 栾守国徐群峰于金凤吕怀成邓玉臻张超
Owner 丛林铝业科技(山东)有限责任公司