阅读说明：本技术 一种高导电率高硬度导电管 (High-conductivity and high-hardness conductive tube ) 是由 崔清磊 王满意 于 2021-08-18 设计创作，主要内容包括：本发明提供一种高导电率高硬度导电管,属于导电管技术领域,其质量百分比组成如下：Si：0.38-0.45%,Fe：0.20%,Cu：0.06-0.09%,Mn：0.03-0.06%,Mg：0.50-0.65%,Cr：0.05%,Zn：0.05%,Ti：0.05%,其他单个元素≤0.05％,其他杂质元素合计≤0.10％,其余为Al,总量为100%；采用高速铸造工艺得到铸棒,将铸棒依次进行均质、挤压、在线淬火和时效,挤压工艺中模温、筒温和棒温分别为480-500℃、420-440℃和500-520℃,在线淬火采用穿水淬火方式,穿水速度为2.0-3.0mm/s,时效工艺采用时效温度为200℃且时效时间为6h。本发明在6063铝合金的基础上通过调整合金成分配、挤压工艺和时效工艺获得导电率高于51%IACS和硬度高于70HB的导电管,满足导电性和力学性能的要求。(The invention provides a high-conductivity high-hardness conductive tube, which belongs to the technical field of conductive tubes and comprises the following components in percentage by mass: si: 0.38-0.45%, Fe: 0.20%, Cu: 0.06-0.09%, Mn: 0.03-0.06%, Mg: 0.50-0.65%, Cr: 0.05%, Zn: 0.05%, Ti: 0.05 percent, less than or equal to 0.05 percent of other single elements, less than or equal to 0.10 percent of other impurity elements in total, and the balance of Al, the total amount is 100 percent; the casting rod is obtained by adopting a high-speed casting process, the casting rod is subjected to homogenization, extrusion, on-line quenching and aging in sequence, the mold temperature, the cylinder temperature and the rod temperature in the extrusion process are respectively 480-. The conductive tube with the conductivity higher than 51% IACS and the hardness higher than 70HB is obtained by adjusting alloy composition distribution, extrusion process and aging process on the basis of 6063 aluminum alloy, and the requirements of conductivity and mechanical property are met.)

1. The high-conductivity high-hardness conductive tube is characterized by comprising the following components in percentage by mass: si: 0.38-0.45%, Fe: 0.20%, Cu: 0.06-0.09%, Mn: 0.03-0.06%, Mg: 0.50-0.65%, Cr: 0.05%, Zn: 0.05%, Ti: 0.05 percent, less than or equal to 0.05 percent of other single elements, less than or equal to 0.10 percent of other impurity elements in total, and the balance of Al, the total amount is 100 percent;

the casting rod is obtained by adopting a high-speed casting process, the casting rod is subjected to homogenization, extrusion, on-line quenching and aging in sequence, the mold temperature, the cylinder temperature and the rod temperature in the extrusion process are respectively 480-.

2. The conductive tube with high conductivity and high hardness as claimed in claim 1, wherein the conductive tube with high conductivity and high hardness has a hardness of 70HB or more.

3. The high-conductivity high-hardness conductive pipe according to claim 2, wherein the conductivity of said high-conductivity high-hardness conductive pipe is 51% IACS or more.

4. The conductive tube with high conductivity and high hardness as claimed in claim 3, wherein the tensile strength of the conductive tube with high conductivity and high hardness is equal to or greater than 215 MPa.

5. The conductive tube with high conductivity and high hardness as claimed in claim 4, wherein the yield strength of the conductive tube with high conductivity and high hardness is equal to or greater than 170 MPa.

6. The conductive tube with high conductivity and high hardness as claimed in claim 5, wherein the elongation of the conductive tube with high conductivity and high hardness is not less than 8%.

7. The conductive pipe with high conductivity and high hardness as claimed in any one of claims 1 to 6, wherein the conductive pipe is further subjected to stretch straightening before aging, and the stretch rate of the stretch straightening is 0.5% to 2.0%.

Technical Field

The invention relates to the technical field of conductive tubes, in particular to a high-conductivity and high-hardness conductive tube.

Background

Aluminum has excellent electrical and thermal conductivity, second only to silver and copper, and is about 62% as conductive as copper. In order to save the amount of copper, aluminum is used to replace copper to make electric wires, cables, conductive elements and other products in the field of power and electrical industry. The main material of the aluminum alloy conductive tube is Al-Mg-Si alloy, and 6000 series aluminum alloy is widely applied to the industries of automobiles, electric power and electric appliances due to moderate strength, better plasticity, corrosion resistance and excellent conductivity. Among them, 6063 aluminum alloy can be widely used as a main material in the production of a conductive tube. 6063 aluminum alloy is heat-treatable strengthened aluminum alloy, and after extrusion, the strength of the 6063 aluminum alloy can be remarkably improved through solution quenching and aging treatment, and excellent structure and performance can be obtained.

However, the conductive tubes made of the current 6063 aluminum alloy have the problem of low conductivity or mechanical property. Therefore, a conductive tube satisfying conductivity and mechanical properties has been developed.

Disclosure of Invention

In view of the above, the invention provides a high-conductivity high-hardness conductive tube, which is obtained by adjusting alloy composition distribution, extrusion process and aging process on the basis of 6063 aluminum alloy, and has conductivity higher than 51% IACS and hardness higher than 70HB, and meets the requirements of conductivity and mechanical property.

In order to solve the technical problems, the invention provides a high-conductivity high-hardness conductive tube, which comprises the following components in percentage by mass: si: 0.38-0.45%, Fe: 0.20%, Cu: 0.06-0.09%, Mn: 0.03-0.06%, Mg: 0.50-0.65%, Cr: 0.05%, Zn: 0.05%, Ti: 0.05 percent, less than or equal to 0.05 percent of other single elements, less than or equal to 0.10 percent of other impurity elements in total, and the balance of Al, the total amount is 100 percent;

the casting rod is obtained by adopting a high-speed casting process, the casting rod is subjected to homogenization, extrusion, on-line quenching and aging in sequence, the mold temperature, the cylinder temperature and the rod temperature in the extrusion process are respectively 480-.

Furthermore, the hardness of the high-conductivity high-hardness conductive tube is more than or equal to 70 HB.

Furthermore, the conductivity of the high-conductivity high-hardness conductive pipe is more than or equal to 51% IACS.

Furthermore, the tensile strength of the high-conductivity high-hardness conductive tube is more than or equal to 215 MPa.

Furthermore, the yield strength of the high-conductivity high-hardness conductive pipe is not less than 170 MPa.

Furthermore, the elongation of the high-conductivity high-hardness conductive tube is more than or equal to 8%.

Furthermore, before aging, stretching straightening is needed, and the stretching rate of the stretching straightening is 0.5-2.0%.

The technical scheme of the invention has the following beneficial effects:

aiming at the problem that the current conductive tubes prepared from 6063 aluminum alloy have low conductivity or mechanical property, the invention provides a high-conductivity high-hardness conductive tube which comprises the following components in percentage by mass: si: 0.38-0.45%, Fe: 0.20%, Cu: 0.06-0.09%, Mn: 0.03-0.06%, Mg: 0.50-0.65%, Cr: 0.05%, Zn: 0.05%, Ti: 0.05 percent, less than or equal to 0.05 percent of other single elements, less than or equal to 0.10 percent of other impurity elements in total, and the balance of Al, the total amount is 100 percent; the casting rod is obtained by adopting a high-speed casting process, the casting rod is subjected to homogenization, extrusion, on-line quenching and aging in sequence, the mold temperature, the cylinder temperature and the rod temperature in the extrusion process are respectively 480-. The high-conductivity and high-hardness conductive tube prepared by adopting the components and the process has the hardness of more than or equal to 70HB, the conductivity of more than or equal to 51 percent IACS, the tensile strength of more than or equal to 215MPa, the yield strength of more than or equal to 170MPa and the elongation of more than or equal to 8 percent, and meets the requirements of the conductivity and the mechanical property of the conductive tube.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention, are within the scope of the invention.

The first embodiment is as follows:

a high-conductivity high-hardness conductive tube comprises the following components in percentage by mass: si: 0.38%, Fe: 0.20%, Cu: 0.06%, Mn: 0.03%, Mg: 0.50%, Cr: 0.05%, Zn: 0.05%, Ti: 0.05 percent, less than or equal to 0.05 percent of other single elements, less than or equal to 0.10 percent of other impurity elements in total, and the balance of Al, the total amount is 100 percent;

the method comprises the steps of obtaining a cast rod by adopting a high-speed casting process, sequentially homogenizing, extruding, quenching on line and aging the cast rod, wherein the mold temperature, the cylinder temperature and the rod temperature in the extruding process are respectively 480 ℃, 420 ℃ and 500 ℃, the online quenching adopts a water penetration quenching mode, the water penetration speed is 2.0mm/s, the aging process adopts the aging temperature of 200 ℃ and the aging time of 6 hours.

The conductive tube prepared by the components and the process has the hardness =78HB, the conductivity =51.6% IACS, the tensile strength =245MPa, the yield strength =180MPa and the elongation =10.5%, and meets the requirements of the conductivity and the mechanical property of the conductive tube.

Example two:

a high-conductivity high-hardness conductive tube comprises the following components in percentage by mass: si: 0.40%, Fe: 0.20%, Cu: 0.07%, Mn: 0.04%, Mg: 0.60%, Cr: 0.05%, Zn: 0.05%, Ti: 0.05 percent, less than or equal to 0.05 percent of other single elements, less than or equal to 0.10 percent of other impurity elements in total, and the balance of Al, the total amount is 100 percent;

the method comprises the steps of obtaining a cast rod by adopting a high-speed casting process, carrying out homogenization, extrusion, on-line quenching and aging on the cast rod in sequence, wherein the mold temperature, the cylinder temperature and the rod temperature in the extrusion process are 490 ℃, 430 ℃ and 510 ℃, respectively, the on-line quenching adopts a water penetration quenching mode, the water penetration speed is 2.5mm/s, and the aging process adopts the aging temperature of 200 ℃ and the aging time of 6 hours.

The conductive tube prepared by the components and the process has the hardness =80HB, the conductivity =52.2% IACS, the tensile strength =242MPa, the yield strength =196MPa and the elongation =11%, and meets the requirements of the conductivity and the mechanical property of the conductive tube.

Example three:

a high-conductivity high-hardness conductive tube comprises the following components in percentage by mass: si: 0.45%, Fe: 0.20%, Cu: 0.09%, Mn: 0.06%, Mg: 0.65%, Cr: 0.05%, Zn: 0.05%, Ti: 0.05 percent, less than or equal to 0.05 percent of other single elements, less than or equal to 0.10 percent of other impurity elements in total, and the balance of Al, the total amount is 100 percent;

the method comprises the steps of obtaining a cast rod by adopting a high-speed casting process, carrying out homogenization, extrusion, on-line quenching and aging on the cast rod in sequence, wherein the mold temperature, the cylinder temperature and the rod temperature in the extrusion process are respectively 500 ℃, 440 ℃ and 520 ℃, the on-line quenching adopts a water penetration quenching mode, the water penetration speed is 3.0mm/s, and the aging process adopts the aging temperature of 200 ℃ and the aging time of 6 h.

The conductive tube prepared by the components and the process has the hardness =82HB, the conductivity =52.9% IACS, the tensile strength =235MPa, the yield strength =194MPa and the elongation =9.5%, and meets the requirements of the conductivity and the mechanical property of the conductive tube.

Example four:

a high-conductivity high-hardness conductive tube comprises the following components in percentage by mass: si: 0.44%, Fe: 0.20%, Cu: 0.08%, Mn: 0.05%, Mg: 0.55%, Cr: 0.05%, Zn: 0.05%, Ti: 0.05 percent, less than or equal to 0.05 percent of other single elements, less than or equal to 0.10 percent of other impurity elements in total, and the balance of Al, the total amount is 100 percent;

the method comprises the steps of obtaining a cast rod by adopting a high-speed casting process, carrying out homogenization, extrusion, on-line quenching and aging on the cast rod in sequence, wherein the mold temperature, the cylinder temperature and the rod temperature in the extrusion process are respectively 500 ℃, 430 ℃ and 510 ℃, the on-line quenching adopts a water penetration quenching mode, the water penetration speed is 2.5mm/s, and the aging process adopts the aging temperature of 200 ℃ and the aging time of 6 h.

The conductive tube prepared by the components and the process has the hardness of =83HB, the conductivity of =53.1% IACS, the tensile strength of =239MPa, the yield strength of =191MPa and the elongation of =9.3%, and meets the requirements of the conductivity and the mechanical property of the conductive tube.

In conclusion, the high-conductivity high-hardness conductive tube prepared by adopting the components and the process has the hardness of more than or equal to 70HB, the conductivity of more than or equal to 51% IACS, the tensile strength of more than or equal to 215MPa, the yield strength of more than or equal to 170MPa and the elongation of more than or equal to 8%, and meets the requirements of the conductivity and the mechanical property of the conductive tube.

In the present invention, unless otherwise explicitly specified or limited, for example, it may be fixedly attached, detachably attached, or integrated; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate, and may be communication between two elements or interaction relationship between two elements, unless otherwise specifically limited, and the specific meaning of the terms in the present invention will be understood by those skilled in the art according to specific situations.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.