阅读说明：本技术 一种适用于丝材增材制造的铝铜合金焊丝 (Aluminum-copper alloy welding wire suitable for wire material additive manufacturing ) 是由 王伟 王帅 翟玉春 于 2019-09-12 设计创作，主要内容包括：本发明公开一种适用于丝材增材制造的铝铜合金焊丝,按质量百分比计：锰Mn：0.3-0.5％,铜Cu：4.6-5.3％,钛Ti：0.15-0.35％,硼B：0.0005-0.006％,钒V：0.05-0.3％,锆Zr：0.05-0.2％,锡Sn：0.05-0.2％,铁Fe：≤0.15％,硅Si：≤0.06％,镁Mg：≤0.05％,锌Zn：≤0.1％,其他单个杂质元素：≤0.05％,其他杂质元素合计：≤0.15％,余量为铝Al。本发明所述焊丝,在生产及使用过程中无有毒性烟尘产生,增材成形堆积体组织均匀,具有高强韧的力学性能且横纵向均匀,表面无有毒性的金属氧化物。(The invention discloses an aluminum-copper alloy welding wire suitable for wire material additive manufacturing, which comprises the following components in percentage by mass: manganese Mn: 0.3-0.5%, Cu: 4.6-5.3%, Ti: 0.15-0.35%, boron B: 0.0005-0.006%, vanadium V: 0.05 to 0.3%, Zr: 0.05 to 0.2%, Sn: 0.05-0.2%, Fe: less than or equal to 0.15 percent, Si: less than or equal to 0.06 percent, magnesium Mg: less than or equal to 0.05 percent, zinc Zn: less than or equal to 0.1 percent, and other single impurity elements: less than or equal to 0.05 percent, and other impurity elements in total: less than or equal to 0.15 percent and the balance of aluminum Al. The welding wire of the invention has no toxic smoke dust in the production and use processes, uniform structure of additive forming accumulation body, high-strength and high-toughness mechanical property, uniform transverse and longitudinal directions and no toxic metal oxide on the surface.)

1. An aluminum-copper alloy welding wire suitable for wire material additive manufacturing is characterized by comprising the following components in percentage by mass: manganese Mn: 0.3-0.5%, Cu: 4.6-5.3%, Ti: 0.15-0.35%, boron B: 0.0005-0.006%, vanadium V: 0.05 to 0.3%, Zr: 0.05 to 0.2%, Sn: 0.05-0.2%, Fe: less than or equal to 0.15 percent, less than or equal to 0.06 percent of silicon Si, less than or equal to magnesium Mg: less than or equal to 0.05 percent, zinc Zn: less than or equal to 0.1 percent, and other single impurity elements: less than or equal to 0.05 percent, and other impurity elements in total: less than or equal to 0.15 percent and the balance of aluminum Al.

2. The aluminum-copper alloy welding wire according to claim 1, comprising the following components in percentage by mass: manganese Mn: 0.3-0.5%, Cu: 4.6-5.3%, Ti: 0.15-0.35%, boron B: 0.0005-0.006%, vanadium V: 0.05 to 0.2%, Zr: 0.05 to 0.2%, Sn: 0.05-0.15%, Fe: less than or equal to 0.15 percent, less than or equal to 0.06 percent of silicon Si, less than or equal to magnesium Mg: less than or equal to 0.05 percent, zinc Zn: less than or equal to 0.1 percent, and other single impurity elements: less than or equal to 0.05 percent, and other impurity elements in total: less than or equal to 0.15 percent and the balance of aluminum Al.

3. The aluminum-copper alloy welding wire according to claim 1, comprising the following components in percentage by mass: manganese Mn: 0.35-0.45%, copper Cu: 5.0-5.3%, Ti: 0.15-0.35%, boron B: 0.0005-0.006%, vanadium V: 0.05 to 0.15%, Zr: 0.05 to 0.2%, Sn: 0.05-0.1%, Fe: less than or equal to 0.15 percent, less than or equal to 0.06 percent of silicon Si, less than or equal to magnesium Mg: less than or equal to 0.02 percent, zinc Zn: less than or equal to 0.1 percent, and other single impurity elements: less than or equal to 0.05 percent, and other impurity elements in total: less than or equal to 0.15 percent and the balance of aluminum Al.

4. The aluminum-copper alloy welding wire as recited in claim 1 to 3, which is used in the military industry or aerospace field.

5. Use of the aluminum-copper alloy welding wire of claims 1-3 in wire additive manufacturing.

Technical Field

The invention belongs to the field of metal materials, and particularly relates to an aluminum-copper alloy welding wire suitable for wire material additive manufacturing.

Background

The Al-Cu alloy has better specific strength and good toughness, and is widely applied in the fields of military industry and aerospace. Various grades of high strength Al-Cu alloys have been developed, such as 2319,2519,2024, ZL204A, ZL205A, and the like. The deformation aluminum-copper alloy is difficult to achieve equal strength matching in the tailor-welding process, and the cast aluminum-copper alloy has the casting defects of wide crystallization temperature range, poor casting performance, difficult realization of sequential solidification, large wall thickness sensitivity, easy generation of loose, hot cracking, oxidation slag inclusion and the like. These problems limit the range of applications for Al-Cu alloys. The great progress is made in preparing Al-Cu alloy structural parts by using a wire material additive manufacturing process at the university of Kelvier, England. For example, in the article of "research on the structure and properties of Al-Cu- (Mg) alloy manufactured by additive manufacturing in CMT Process" by doctor of Jianglong, the structure and properties of aluminum-copper alloy manufactured by additive manufacturing of wire are described.

The wire additive manufacturing is carried out by the traditional aluminum-copper alloy welding wire at present, and the mechanical properties of a stack such as 2319,2519 and the like are different in the transverse direction and the longitudinal direction. Cast aluminum alloys such as ZL204A and ZL205A contain alloy element Cd with low vapor pressure, are seriously burnt during printing, and a layer of oxide of Cd is attached to the surface of a stack body and has toxicity, so the alloys cannot be used for wire additive manufacturing processes. At present, the high-toughness aluminum alloy welding wire suitable for wire material additive manufacturing is not reported.

Disclosure of Invention

The invention aims to provide an aluminum-copper alloy welding wire suitable for wire additive manufacturing.

In order to achieve the technical purpose, the technical scheme adopted by the invention is as follows:

an aluminum-copper alloy welding wire suitable for wire material additive manufacturing comprises the following components in percentage by mass: manganese Mn: 0.3-0.5%, Cu: 4.6-5.3%, Ti: 0.15-0.35%, boron B: 0.0005-0.006%, vanadium V: 0.05 to 0.3%, Zr: 0.05 to 0.2%, Sn: 0.05-0.2%, Fe: less than or equal to 0.15 percent, less than or equal to 0.06 percent of silicon Si, less than or equal to magnesium Mg: less than or equal to 0.05 percent, zinc Zn: less than or equal to 0.1 percent, and other single impurity elements: less than or equal to 0.05 percent, and other impurity elements in total: less than or equal to 0.15 percent and the balance of aluminum Al.

In a preferred embodiment, the aluminum-copper alloy welding wire suitable for wire additive manufacturing comprises the following components in percentage by mass: manganese Mn: 0.3-0.5%, Cu: 4.6-5.3%, Ti: 0.15-0.35%, boron B: 0.0005-0.006%, vanadium V: 0.05 to 0.2%, Zr: 0.05 to 0.2%, Sn: 0.05-0.15%, Fe: less than or equal to 0.15 percent, less than or equal to 0.06 percent of silicon Si, less than or equal to magnesium Mg: less than or equal to 0.05 percent, zinc Zn: less than or equal to 0.1 percent, and other single impurity elements: less than or equal to 0.05 percent, and other impurity elements in total: less than or equal to 0.15 percent and the balance of aluminum Al.

In a preferred embodiment, the aluminum-copper alloy welding wire suitable for wire additive manufacturing comprises the following components in percentage by mass: manganese Mn: 0.35-0.45%, copper Cu: 5.0-5.3%, Ti: 0.15-0.35%, boron B: 0.0005-0.006%, vanadium V: 0.05 to 0.15%, Zr: 0.05 to 0.2%, Sn: 0.05-0.1%, Fe: less than or equal to 0.15 percent, less than or equal to 0.06 percent of silicon Si, less than or equal to magnesium Mg: less than or equal to 0.02 percent, zinc Zn: less than or equal to 0.1 percent, and other single impurity elements: less than or equal to 0.05 percent, and other impurity elements in total: less than or equal to 0.15 percent and the balance of aluminum Al.

The welding wire is prepared according to the preparation method of the novel solid welding wire (patent number: CN 103286481B).

The individual impurity elements described in the present invention mean other elements than the listed elements.

The invention also provides application of the welding wire in the field of military industry or aerospace.

The invention also provides application of the welding wire in wire additive manufacturing.

In the aluminum-copper alloy welding wire, the Cu element is a basic strengthening element and forms a theta phase with Al to play a role in solid solution strengthening and dispersion strengthening. Mn reacts with Al and Cu to form a T phase which is separated out in dispersion mass points during solution treatment, and the strength at room temperature and high temperature can be improved. Adding a small amount of Ti and Zr in the alloy to generate Al with Al₃Ti and Al₃Zr phase, Al₃Ti and Al₃The dispersed mass point of Zr can be used as the crystal core of α phase to refine the crystal grain of α (Al), V can reduce the hot crack sensitivity of the aluminum-copper alloy, Sn can promote the precipitation and dispersion distribution of strengthening phase during aging, and improve the mechanical property of the aluminum-copper alloyIn the body, the bonding capacity with the vacancy is strong, the solubility is small, the diffusivity is high, the precipitation strengthening of the aluminum-copper alloy can be promoted, and the Sn has no toxicity and meets the requirement of production safety, wherein the Sn is different from the toxic Cd and the In with slight radioactivity.

The invention has the beneficial effects that: the aluminum-copper alloy welding wire disclosed by the invention is small in crystal grain, uniform in structure and suitable for wire additive manufacturing. No toxic smoke is generated in the smelting and wire additive production processes, the burning loss rate of elements is low, and no toxic metal oxide exists on the surface of an accumulation body in the wire additive manufacturing process. After the additive forming accumulation body is subjected to heat treatment, the structure crystal grains are fine, the distribution of the strengthening phase is uniform, the performance is stable, and the mechanical property of the T6 after the heat treatment can reach that: tensile strength: 493MPa, yield strength: 434MPa, elongation: 10.5 percent and is uniform in the transverse direction and the longitudinal direction. The alloy is the optimal high-strength and high-toughness aluminum alloy material suitable for wire material additive manufacturing at present.

Drawings

FIG. 1 is a microstructure of a welding wire;

FIG. 2 is a microstructure of a stack (direct stacked state);

FIG. 3 shows the microstructure of the stack (T6).

Detailed description of the invention

The present invention is further described with reference to the following detailed description, but the present invention is not limited to the examples, and the methods of the present invention are conventional methods in the art unless otherwise specified, and the materials used are conventional materials purchased unless otherwise specified. The parts not involved in the present invention are the same as or can be implemented using the prior art.