阅读说明：本技术 一种激光制造应用于导电横臂的高强高导铜合金材料及其制备工艺 (High-strength high-conductivity copper alloy material applied to conductive cross arm and prepared by laser manufacturing and preparation process thereof ) 是由 张冬雪 陈海涛 董思远 于 2021-08-18 设计创作，主要内容包括：本发明属于国际专利分类表中的C23C24/10(2006.01)I技术领域,涉及一种激光制造应用于导电横臂的高强高导铜合金材料及其制备工艺。一种激光制造应用于导电横臂的高强高导铜合金粉末材料,该合金粉末材料包括如下组分：A：g3～12%、Ti：1～5%、C：0.1～5%、Al：0.3～6%、W：0.1～2.6%、Mo：2～6%、Zn：1.2～3%,Cu：余量。本发明通过激光方式向高导电的铜合金基体组织中复合添加银合金粉末进而抵消后续添加的合金元素材料对导电性能造成的消极影响；进一步添加了第二相强化粒子碳化钛进行强化铜合金基体自身强度,使导电横臂具有足够的刚度,减少加速度调节时可能产生的振动,使合金粉末获得优越的综合性能,从而实现了合金在具有较高的强度的同时,具有良好的导电性能。(The invention belongs to the technical field of C23C24/10(2006.01) I in the international patent classification table, and relates to a high-strength high-conductivity copper alloy material applied to a conductive cross arm and a preparation process thereof. A high-strength high-conductivity copper alloy powder material applied to a conductive cross arm is manufactured by laser, and comprises the following components: a: g 3-12%, Ti: 1-5%, C: 0.1-5%, Al: 0.3-6%, W: 0.1-2.6%, Mo: 2-6% and Zn: 1.2-3%, Cu: and (4) the balance. According to the invention, silver alloy powder is added into a high-conductivity copper alloy matrix structure in a laser mode in a composite manner, so that the negative influence of subsequently added alloy element materials on conductivity is counteracted; the second-phase reinforced particle titanium carbide is further added to reinforce the strength of the copper alloy matrix, so that the conductive cross arm has enough rigidity, vibration possibly generated during acceleration adjustment is reduced, and alloy powder obtains excellent comprehensive performance, so that the alloy has high strength and good conductivity.)

1. The high-strength high-conductivity copper alloy powder material for the conductive cross arm is manufactured by laser, and is characterized by comprising the following components: ag: 3-12%, Ti: 1-5%, C: 0.1-5%, Al: 0.3-6%, W: 0.1-2.6%, Mo: 2-6% and Zn: 1.2-3%, Cu: and (4) the balance.

2. The laser-made high-strength high-conductivity copper alloy powder material applied to the conductive cross arm as claimed in claim 1, wherein the alloy powder material is prepared through vacuum melting, vacuum gas atomization and screening processes, and the powder granularity is-100 to +270 meshes.

3. A preparation process for manufacturing a high-strength and high-conductivity copper alloy material applied to a conductive cross arm by using laser is characterized by being suitable for a fiber laser, and the parameters of a cladding process for applying the powder material are as follows: power: 950-1950W, spot diameter: 2.5-4.5 mm, scanning speed: 55-75 mm/s, powder placing thickness: 1.2-1.8 mm.

Technical Field

The invention belongs to the technical field of C23C24/10(2006.01) I in the international patent classification table, relates to a high-strength high-conductivity copper alloy material for a conductive cross arm, and particularly relates to a high-strength high-conductivity copper alloy material applied to the conductive cross arm in laser manufacturing and a preparation process thereof.

Background

Copper and copper alloy are one of the non-ferrous metals closely related to human life, and are also basic materials widely applied to various industries all over the world. Copper and copper alloys are widely used because of their incomparably excellent properties of other materials, the most important property is the high strength and high conductivity of the materials, and the high conductivity copper alloys are mainly used in the electrical and electronic industries, such as conductive cross arms, integrated circuit lead frames, contact wires of electric locomotives, resistance welding electrodes, etc. The conductive cross arm is designed by initially removing a large number of conductive copper pipes and a large number of auxiliary insulating parts, so that the maintenance workload is greatly reduced, and higher requirements are provided for the conductivity and the self strength of the conductive cross arm. However, pure copper has low strength, and other alloying elements are generally selected to form a copper alloy in order to improve the mechanical properties of copper. However, these conventional methods produce copper alloys with significantly increased strength at the expense of electrical conductivity, which decreases with increasing alloying levels. Therefore, how to improve the strength of the copper alloy and ensure the conductivity of the copper alloy is a problem to be solved urgently at present.

The laser surface strengthening technology is started from the appearance of high-power lasers in the century. With the progress of modern science and the development of industrial technology, high-power laser processing equipment is gradually perfected, the research of laser surface strengthening technology is also obviously improved, and the application field of the laser surface strengthening technology is continuously expanded. As the requirements of industrial production and high-tech military equipment on the surface performance of materials are higher and higher, the laser surface strengthening technology is also more and more important in the field of materials, and becomes a high and new technology with certain competitiveness and wide application. Therefore, a new composite material is designed, a compact cladding layer metallurgically bonded with a matrix is obtained by rapid solidification after laser beam scanning, and the specific reinforcement purpose can be completely achieved.

Because no corresponding material exists in the field of laser cladding of the high-strength and high-conductivity copper alloy material used by the conductive cross arm at present, through special research, development and development, the high-strength and high-conductivity copper alloy material applied to the conductive cross arm by the laser surface technology is a problem to be solved urgently.

Disclosure of Invention

In view of the problems in the prior art, the invention aims to provide a high-strength and high-conductivity copper alloy material applied to a conductive cross arm by laser manufacturing and a preparation process thereof. The invention adopts a laser cladding method to manufacture the conductive cross arm and greatly prolongs the service life of the conductive cross arm. The high-strength high-conductivity copper alloy coating is prepared by adding silver alloy powder material into a copper material matrix in a laser compounding process mode to ensure the conductivity of the alloy, adding proper titanium carbide second-phase strengthening particles to improve the self-strength of a cladding area, and enabling the titanium carbide second-phase strengthening particles to be uniformly dispersed and distributed in the material tissue through a proper laser cladding process and a heat treatment process. And because the toughness of the matrix material is better, the crack tendency is extremely small under the proper laser cladding process.

In order to achieve the purpose, the invention adopts the following technical scheme.

A high-strength high-conductivity copper alloy powder material applied to a conductive cross arm is manufactured by laser, and comprises the following components: ag: 3-12%, Ti: 1-5%, C: 0.1-5%, Al: 0.3-6%, W: 0.1-2.6%, Mo: 2-6% and Zn: 1.2-3%, Cu: and (4) the balance.

The high-strength and high-conductivity copper alloy powder material for manufacturing the conductive cross arm by using the laser is prepared by the procedures of vacuum melting, vacuum atomization, screening and the like, and the granularity is-100 to +270 meshes.

A method for manufacturing a high-strength high-conductivity copper alloy powder material of a steel-copper composite conductive cross arm by laser is suitable for a fiber laser, and the parameters of a cladding process applying the powder material are as follows: power: 950-1950W, spot diameter: 2.5-4.5 mm, scanning speed: 55-75 mm/s, powder placing thickness: 1.2-1.8 mm.

Compared with the prior art, the invention has the following beneficial effects.

According to the invention, silver alloy powder is added into a high-conductivity copper alloy matrix structure in a laser mode in a composite manner, so that the negative influence of subsequently added alloy element materials on conductivity is counteracted; second-phase reinforced particle titanium carbide is further added to reinforce the strength of the copper alloy matrix, so that the conductive cross arm has enough rigidity, and vibration possibly generated during acceleration adjustment is reduced; the alloy powder obtains excellent comprehensive performance by reasonably controlling the percentage content of other elements, thereby realizing that the alloy has high strength and good conductivity, and the alloy and a bottom steel base material form a compact metallurgical bonding layer by a laser cladding technology, thereby meeting the use requirement of a laser cladding conductive cross arm.

Because the addition of corresponding matrix strengthening elements strengthens the strength of the copper alloy matrix, and simultaneously because the titanium carbide second phase strengthening particles are added in a particle form, isolated hard phase islands are formed in the copper alloy matrix, the generation of cracks is inhibited from another angle, and the copper alloy has enough toughness, so that cracks do not appear on the surface after flaw detection, and an alloy structure with good comprehensive performance is obtained. The overall performance of the alloy under the condition is represented by stable process and uniform components, and the service life of the product is ensured.

The silver alloy powder with a proper mass fraction is added, so that the high conductivity of the alloy powder after laser cladding is ensured, and the positive effect of the silver alloy powder after a certain proportion of silver alloy powder is added can greatly reduce the negative effect on the conductivity caused by adding other alloy elements and strengthening second phase particles, so that the overall use performance of the product is effectively ensured.

Detailed Description

The following describes in detail specific embodiments of the present invention. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.

A high-strength high-conductivity copper alloy powder material applied to a conductive cross arm is manufactured by laser, and comprises the following components: ag: 3-12%, Ti: 1-5%, C: 0.1-5%, Al: 0.3-6%, W: 0.1-2.6%, Mo: 2-6% and Zn: 1.2-3%, Cu: and (4) the balance.

The high-strength and high-conductivity copper alloy powder material for manufacturing the conductive cross arm by using the laser is prepared by the procedures of vacuum melting, vacuum atomization, screening and the like, and the granularity is-100 to +270 meshes.

A method for manufacturing a high-strength high-conductivity copper alloy powder material of a steel-copper composite conductive cross arm by laser is suitable for a fiber laser, and the parameters of a cladding process applying the powder material are as follows: power: 950-1950W, spot diameter: 2.5-4.5 mm, scanning speed: 55-75 mm/s, powder placing thickness: 1.2-1.8 mm.

Example 1.

The current technology cannot meet the use requirements of higher arc transmission efficiency and safe, reliable and stable operation due to the requirement of higher and higher productivity when the electric arc furnace conductive cross arm of a production line of a certain steel mill in the Anshan mountain is used.

After the laser cladding manufacturing is carried out by using the application method of the invention, the laser cladding parameters are as follows: power: 1100W, spot diameter: 3.8mm, scanning speed: 55mm/s, powder placement thickness: 1.5 mm. The high-strength high-conductivity copper alloy with the granularity of 160 meshes for manufacturing the steel-copper composite conductive cross arm by laser cladding comprises the following components in percentage by mass: ag: 10.8 percent; 3.5 percent of Ti; 0.35 percent of C; al: 0.9 percent; w: 1.3 percent; mo: 4 percent; 2.5 percent of Zn; cu: and (4) the balance.

The size and the precision required by the original design are recovered after the design by a proper cladding process. The machine is in service under the actual working condition, the resistance value and the reactance value are greatly reduced, and the production rate of use is improved by 1.7 times because the laser cladding layer has uniform tissue and the equipment stably and safely operates. The high-strength and high-conductivity design of the material is proved to completely meet the design index.

Example 2.

When the electric arc furnace conductive cross arm of a production line of a steel plant in Hebei is used, the originally used conductive cross arm has low electric arc transmission efficiency and is difficult to meet the requirements of higher and higher production rate, and the difficulty is clearly proposed to be solved after communication.

After the laser cladding manufacturing is carried out by using the application method of the invention, the laser cladding parameters are as follows: power: 1250W, spot diameter: 3.9mm, scanning speed: 75mm/s, powder placement thickness: 1.8 mm. The high-strength high-conductivity copper alloy with the granularity of 160 meshes for manufacturing the steel-copper composite conductive cross arm by laser cladding comprises the following components in percentage by mass: 11.8 percent of Ag; 3.1 percent of Ti; 0.45 percent of C; al 2 percent; 1.4 percent of W; mo is 3 percent; 2.8 percent of Zn; the balance of Cu.

The size and the precision required by the original design are recovered after the design by a proper cladding process. The upper machine is in service under the actual working condition, the resistance value and the reactance value are reduced, the stable and safe operation is always kept in the upper machine process, the vibration generated in acceleration does not occur, the rigidity is guaranteed, and the use production rate is improved by nearly 2 times. The high-strength and high-conductivity design of the material is proved to completely meet the design index.