阅读说明：本技术 一种高导电率高强度铝合金导电型材及生产工艺 (High-conductivity and high-strength aluminum alloy conductive profile and production process thereof ) 是由 廖健 于 2019-09-23 设计创作，主要内容包括：本发明公开了一种高导电率高强度铝合金导电型材,其组成成分及质量百分比为：Mg为0.57~0.58％,Si为0.41~0.42％,Fe为0.10~0.11％,Cu为0.02~0.03％,Mn为0.08~0.09％,Cr为0.08~0.09％,Ti为0.02~0.03％,Zn为0.03~0.04％,其余杂质单个为0.05％,其余杂质的总和为0.15％,余量为Al；它还包括高导电率高强度铝合金导电型材的生产工艺；它还公开了高导电率高强度铝合金导电型材的生产工艺。本发明的有益效果是：抗拉强度、导电率高、制造工艺简单。(The invention discloses a high-conductivity high-strength aluminum alloy conductive profile, which comprises, by mass, 0.57 ~ 0.58.58% of Mg, 0.41 ~ 0.42.42% of Si, 0.10 ~ 0.11.11% of Fe, 0.02 ~ 0.03.03% of Cu, 0.08 ~ 0.09.09% of Mn, 0.08 ~ 0.09.09% of Cr, 0.02 ~ 0.03.03% of Ti, 0.03 ~ 0.04.04% of Zn, 0.05% of other impurities, 0.15% of the total sum of the other impurities and the balance of Al.)

1. The high-conductivity high-strength aluminum alloy conductive profile is characterized by comprising, by mass, 0.57 ~ 0.58.58% of Mg, 0.41 ~ 0.42.42% of Si, 0.10 ~ 0.11.11% of Fe, 0.02 ~ 0.03.03% of Cu, 0.08 ~ 0.09.09% of Mn, 0.08 ~ 0.09.09% of Cr, 0.02 ~ 0.03.03% of Ti, 0.03 ~ 0.04.04% of Zn, 0.05% of other impurities, 0.15% of the total sum of the other impurities and the balance of Al.

2. The conductive aluminum alloy profile with high conductivity and high strength as claimed in claim 1, wherein: the composite material comprises the following components in percentage by mass: 0.57% of Mg, 0.41% of Si, 0.10% of Fe, 0.02% of Cu, 0.08% of Mn, 0.08% of Cr, 0.02% of Ti, 0.03% of Zn, 0.05% of other impurities individually, 0.15% of the total of the other impurities and the balance of Al.

3. The conductive aluminum alloy profile with high conductivity and high strength as claimed in claim 1, wherein: the composite material comprises the following components in percentage by mass: 0.57% of Mg, 0.42% of Si, 0.10% of Fe, 0.03% of Cu, 0.08% of Mn, 0.08% of Cr, 0.02% of Ti, 0.04% of Zn, 0.05% of other impurities individually, 0.15% of the total of the other impurities and the balance of Al.

4. The conductive aluminum alloy profile with high conductivity and high strength as claimed in claim 1, wherein: the composite material comprises the following components in percentage by mass: 0.58% of Mg, 0.42% of Si, 0.11% of Fe, 0.03% of Cu, 0.09% of Mn, 0.09% of Cr, 0.03% of Ti, 0.04% of Zn, 0.05% of other impurities individually, 0.15% of the total of the other impurities and the balance of Al.

5. The process for producing the conductive aluminum alloy profile with high conductivity and high strength as claimed in claim 1 ~ 4, wherein the process comprises the following steps:

s1, casting the alloy, which comprises the following steps:

s11, effectively removing impurity gas and impurity slag in the smelting furnace through degassing and deslagging to ensure that the components of the cast ingot are controlled within a standard range;

s12, adding the raw material components into a smelting furnace according to the weight ratio requirement for smelting to obtain aluminum liquid;

s13, casting the molten aluminum into a cavity of a casting mold, controlling the casting speed within the range of 80 ~ 100mm/min to avoid the generation of crack defects of the cast ingot, preserving heat for a period of time, preparing an aluminum alloy cast ingot in the cavity, and taking out the aluminum alloy cast ingot after casting and forming;

s2, carrying out homogenizing annealing treatment on the aluminum alloy cast ingot, namely putting the aluminum alloy cast ingot into an annealing furnace, setting the homogenizing temperature of the annealing furnace to be 540 ~ 550 ℃, the heat preservation time to be 23 ~ 24h, and the cooling speed to be more than or equal to 200 ℃/h;

s3, heating the aluminum alloy ingot in the step S2 by adopting a power frequency induction heating mode, and heating the aluminum alloy ingot to 500 ~ 520 ℃ within 4 ~ 5 min;

s4, extrusion forming of the aluminum alloy section, specifically comprising the following steps:

s41, setting the temperature of an extrusion die to be 480 ~ 490 ℃, the temperature of an extrusion cylinder to be 440 ~ 480 ℃, the extrusion speed to be controlled within the range of 4 ~ 5m/min, and the temperature of an extrusion outlet of the section to be 510 ~ 550 ℃ to be 550 ℃;

s42, conveying the aluminum alloy cast ingot heated in the step S3 into an extrusion die, and preparing an aluminum alloy section at an extrusion port;

s43, cooling the aluminum alloy section by water, and rapidly cooling to below 50 ℃ to finish the quenching treatment of the aluminum alloy section;

s5, preserving heat for 13h at the temperature of 205 ℃ to finish the aging treatment of the aluminum alloy section.

Technical Field

The invention relates to the field of aluminum alloy materials, in particular to a high-conductivity high-strength aluminum alloy conductive section and a production process thereof.

Background

Urban rail transit construction with energy-saving, fast and mass-transportation features has been receiving increasing attention from many cities since the 21 st century. The urban public passenger transport system for urban rail transit running under guidance of special rails comprises a subway system, a light rail system, a tramcar, a monorail system, an automatic guidance rail system, an urban area rapid rail system and a magnetic suspension system. The smooth, efficient and reliable traffic travel is not only the basis for the traveler to select the travel mode, but also the target for the urban traffic manager to pursue. Therefore, urban rail transit becomes an important component of urban public transport by virtue of the characteristics of rapidness, convenience, safety, large transportation volume, high transportation efficiency and the like. More and more residents choose to travel on rail transit in cities where China has operated rail transit.

With the development of companies, the requirements of different customers on products tend to be diversified, and the common 6-series aluminum alloy section bar cannot meet the requirements of some customers on the performance of special aluminum alloys. In recent time, the market has increasingly strict requirements on the electrical conductivity and not only the common strength of the aluminum profiles. For example, the electric conductivity of 6063 alloy required by ZTJ series section bar reaches 32.5MS/m on the basis of meeting the national standard strength, the electric resistivity of 6101B alloy required by HLP series section bar satisfies that the electric resistivity is lower than 0.0320 omega. mm/m under the national standard condition, and the electric conductivity of the existing common aluminum alloy section bar can only reach 30.2MS/m, so that the aluminum alloy section bar with high mechanical strength and high electric conductivity is urgently needed.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide the high-conductivity high-strength aluminum alloy conductive section with high mechanical strength, high conductivity and simple manufacturing process and the production process thereof.

The invention aims to realize the purpose by the following technical scheme that the high-conductivity high-strength aluminum alloy conductive section comprises the following components, by mass, 0.57 ~ 0.58.58% of Mg, 0.41 ~ 0.42.42% of Si, 0.10 ~ 0.11% of Fe, 0.02 ~ 0.03.03% of Cu, 0.08 ~ 0.09.09% of Mn, 0.08 ~ 0.09.09% of Cr, 0.02 ~ 0.03.03% of Ti, 0.03 ~ 0.04.04% of Zn, 0.05% of single impurities, 0.15% of total impurities and the balance of Al.

The composite material comprises the following components in percentage by mass: 0.57% of Mg, 0.41% of Si, 0.10% of Fe, 0.02% of Cu, 0.08% of Mn, 0.08% of Cr, 0.02% of Ti, 0.03% of Zn, 0.05% of other impurities individually, 0.15% of the total of the other impurities and the balance of Al. .

The composite material comprises the following components in percentage by mass: 0.57% of Mg, 0.42% of Si, 0.10% of Fe, 0.03% of Cu, 0.08% of Mn, 0.08% of Cr, 0.02% of Ti, 0.04% of Zn, 0.05% of other impurities individually, 0.15% of the total of the other impurities and the balance of Al.

The composite material comprises the following components in percentage by mass: 0.58% of Mg, 0.42% of Si, 0.11% of Fe, 0.03% of Cu, 0.09% of Mn, 0.09% of Cr, 0.03% of Ti, 0.04% of Zn, 0.05% of other impurities individually, 0.15% of the total of the other impurities and the balance of Al.

The production process of the high-conductivity and high-strength aluminum alloy conductive section comprises the following steps:

s1, casting the alloy, which comprises the following steps:

s11, effectively removing impurity gas and impurity slag in the smelting furnace through degassing and deslagging to ensure that the components of the cast ingot are controlled within a standard range;

s12, adding the raw material components into a smelting furnace according to the weight ratio requirement for smelting to obtain aluminum liquid;

s13, casting the molten aluminum into a cavity of a casting mold, controlling the casting speed within the range of 80 ~ 100mm/min to avoid the generation of crack defects of the cast ingot, preserving heat for a period of time, preparing an aluminum alloy cast ingot in the cavity, and taking out the aluminum alloy cast ingot after casting and forming;

s2, carrying out homogenizing annealing treatment on the aluminum alloy cast ingot, namely putting the aluminum alloy cast ingot into an annealing furnace, setting the homogenizing temperature of the annealing furnace to be 540 ~ 550 ℃, the heat preservation time to be 23 ~ 24h, and the cooling speed to be more than or equal to 200 ℃/h;

s3, heating the aluminum alloy ingot in the step S2 by adopting a power frequency induction heating mode, and heating the aluminum alloy ingot to 500 ~ 520 ℃ within 4 ~ 5 min;

s4, extrusion forming of the aluminum alloy section, specifically comprising the following steps:

s41, setting the temperature of an extrusion die to be 480 ~ 490 ℃, the temperature of an extrusion cylinder to be 440 ~ 480 ℃, the extrusion speed to be controlled within the range of 4 ~ 5m/min, and the temperature of an extrusion outlet of the section to be 510 ~ 550 ℃ to be 550 ℃;

s42, conveying the aluminum alloy cast ingot heated in the step S3 into an extrusion die, and preparing an aluminum alloy section at an extrusion port;

s43, cooling the aluminum alloy section by water, and rapidly cooling to below 50 ℃ to finish the quenching treatment of the aluminum alloy section;

s5, preserving heat for 13h at the temperature of 205 ℃ to finish the aging treatment of the aluminum alloy section.

The invention has the following advantages that the chemical components are controlled, the extrusion temperature and the extrusion speed are improved, the aging temperature is properly adjusted, the aging time is prolonged, the tensile strength and the conductivity of the prepared aluminum alloy section can respectively reach 222Mpa and 32.5MS/m under the conditions that the temperature of an extrusion cylinder is 440 ~ 460 ℃, the temperature of a die is 470 ~ 490 ℃, the extrusion speed is 4 ~ 4.5.5 m/min, the cooling mode is water penetration, and the aging system is 205 ℃ for 13h, so that the market requirements are met.

Drawings

FIG. 1 is a graph of mechanical properties and electrical conductivity of an aluminum alloy profile after aging.

Detailed Description

The invention will be further described with reference to the accompanying drawings, without limiting the scope of the invention to the following: