Welding material and process used between high-manganese-content manganese-copper damping alloys

Abstract

The invention provides a welding material used between high-manganese-content manganese-copper damping alloys and a manufacturing process. The welding material is composed of, by mass, 50%-70% of Mn, 4%-6% of Ni, 1%-3% of Fe, 2%-6% of Al, 2%-4% of Sr, 20%-21% of Cu, 5%-7% of Mg, 3%-5% of Zn and the balance impurity elements. Based on the welding material, the invention further provides a corresponding manufacturing process, and the problems that when the two manganese-copper damping alloys are welded and connected, the welding performance is shown in the welding process, the matching performance of a welded joint and a base material is poor, and the plasticity of the welded joint is poor are solved.

Description

Technical Field

[0001] The invention relates to the technical field of alloys, in particular to a welding material between manganese-copper damping alloys with high manganese content. Background Art

[0002] With the rapid development of modern technology, the power of mechanical components such as aircraft, ships, and vehicles is constantly increasing. At the same time, due to the continuous expansion of various industrial scales, noise and vibration have become a problem that cannot be ignored in the industrial and environmental protection fields. Vibration can not only cause fatigue damage to materials, but also reduce the reliability, accuracy and service life of mechanical work. In the field of ships, vibration and noise can make the submarine engine noise too loud and expose itself to the enemy, and also affect the normal operation of the navigator. In the field of electronic imaging, vibration inevitably produces background noise, reducing the signal-to-noise ratio and image quality. For people's lives, vibration and noise seriously affect physical and mental health, and even endanger life. It can be seen that vibration and noise have become one of the three major public hazards in the world.

[0003] There are three ways to control noise: system damping, structural damping and material damping. For mechanical and structural parts working under dynamic conditions, the use of high-damping alloys with large internal friction is effective in reducing harmful vibration and noise, hindering its propagation, and reducing resonance peak stress. In many cases, it is even the only choice.

[0004] There are three major advantages of using damping alloys to achieve shock absorption: preventing and reducing vibration, preventing and reducing noise, and increasing the fatigue life of materials. For example, after the base of a car engine is made of damping alloys, the vibration transmitted to the passenger cabin is greatly reduced, which improves the comfort of the driver and passengers; after the high-speed rail tracks and rollers and their transmission are made of damping alloys, noise pollution can also be greatly reduced while increasing the comfort of passengers; after the foundation of a high-rise building is made of damping alloys, the losses caused by small earthquakes can be reduced.

[0005] At present, the above welding shortcomings make this type of material mostly connected by riveting, and there are few ideal materials for manganese-copper high damping alloy to be used for welding connection. Summary of the invention

[0006] In order to overcome the deficiencies of the prior art, the present invention provides a welding material and process for high manganese content manganese-copper damping alloys.

[0007] In order to achieve the above-mentioned purpose, the present invention provides a welding material for high manganese content manganese-copper damping alloys, characterized in that the welding material is composed of the following elements in percentage by mass: Mn: 50%-70%, Ni: 4%-6%, Fe: 1%-3%, Al: 2%-6%, Sr: 2%-4%, Cu: 20-21%, Mg: 5%-7%, Zn: 3%-5%, and the remainder is impurity elements.

[0008] Preferably, when welding high manganese content manganese-copper damping alloys, the welding material is ER308L.

[0009] The present invention provides a process for manufacturing a welding material between manganese-copper damping alloys with a high manganese content, and the specific steps include:

[0010] (1) Allocate each raw material according to mass percentage;

[0011] (2) placing the prepared materials into a vacuum induction furnace for smelting, introducing argon as a protective gas, and smelting the materials;

[0012] (3) After the smelted material is demolded and cooled, it is placed in a heat treatment furnace, slowly heated to 1000 degrees under vacuum, kept warm for 10 minutes, and stirred the alloy melt by electromagnetic stirring until it is uniform, and then introduced into a cast iron mold for casting;

[0013] (4) hot rolling the alloy ingot after homogenization heat treatment at 820-850° C. and keeping the temperature for 3 h;

[0014] (5) After keeping warm, the temperature is slowly lowered, and the rolled alloy is cut into welding materials of corresponding sizes. The cut welding materials are placed in a heat treatment furnace at 850°C, kept warm for 2 hours, and then placed in cold water for water cooling quenching to obtain the target material.

[0015] Preferably, the rolled alloy has a thickness of 2-3 mm.

[0016] Preferably, the rolled alloy has a thickness of 1-2 mm.

[0017] Preferably, the mass percentages of the raw materials in step 1 are: Mn: 55%-65%, Ni: 4%-5%, Fe: 2%-3%, Al: 4%-5%, Sr: 3%-4%, Cu: 20-21%, Mg: 5%-6%, Zn: 4%-4.5%, and the impurity elements do not exceed 1%.

[0018] The present invention provides a welding material and process for high manganese content manganese-copper damping alloys, which has the following beneficial effects:

[0019] 1. It overcomes the problems of welding performance during welding and matching performance between the joint and the base material after welding when welding two pieces of manganese-copper damping alloys, as well as the problem of inclusions formed and suspended in the molten pool during high-power welding, resulting in thermal cracks in the welded joint.

[0020] 2. It can fully fill the pores in the two workpieces to be connected, and fundamentally eliminate the phenomenon of increased oxidation caused by the flow of traditional manganese-copper damping alloys with high manganese content after melting.

[0021] 3. It overcomes the disadvantage of poor shaping of welding joints of traditional materials.

[0022] 4. The welded joints of this material have excellent stress corrosion resistance, wide practicability, simple processing and smelting methods, low production costs, and are convenient for industrial large-scale production and practical applications. After application and industrialization, it can not only solve industry problems, but also gain great market value. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A manufacturing process flow chart of a welding material for high manganese content manganese-copper damping alloys provided by the present invention. DETAILED DESCRIPTION

[0024] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0025] The present invention provides a welding material and process for high-manganese-content manganese-copper damping alloys. The welding material consists of the following elements in percentage by mass: Mn: 50%-70%, Ni: 4%-6%, Fe: 1%-3%, Al: 2%-6%, Sr: 2%-4%, Cu: 20-21%, Mg: 5%-7%, Zn: 3%-5%, and the remainder is impurity elements.

[0026] The present invention also provides a process for manufacturing a welding material for high manganese content manganese-copper damping alloys, the process steps of which include:

[0027] (1) Allocate each raw material according to mass percentage;

[0028] (2) placing the prepared materials into a vacuum induction furnace for smelting, introducing argon as a protective gas, and smelting the materials;

[0029] (3) After the smelted material is demolded and cooled, it is placed in a heat treatment furnace, slowly heated to 1000 degrees under vacuum, kept warm for 10 minutes, and stirred the alloy melt by electromagnetic stirring until it is uniform, and then introduced into a cast iron mold for casting;

[0030] (4) hot rolling the alloy ingot after homogenization heat treatment at 820-850° C. and keeping the temperature for 3 h;

[0031] (5) After heat preservation, the temperature is slowly lowered, and the rolled alloy is cut into welding materials of corresponding sizes. The cut welding materials are placed in a heat treatment furnace at 850°C, kept at this temperature for 2 hours, and then placed in cold water for water cooling quenching to obtain the target material.

[0032] The rolled alloy has a thickness of 2-3 mm or 1-2 mm. In addition, the mass percentages of the raw materials in step 1 are: Mn: 55%-65%, Ni: 4%-5%, Fe: 2%-3%, Al: 4%-5%, Sr: 3%-4%, Cu: 20-21%, Mg: 5%-6%, Zn: 4%-4.5%, and the impurity elements do not exceed 1%.

[0033] The welding material manufactured by the above manufacturing process is ER308L when welding high manganese content manganese copper damping alloys. The melting point of the material is 1000 degrees. After being prepared into a strip welding material, two pieces of manganese copper high damping alloy can be connected under argon protection. This material can completely overcome the shortcomings of poor plasticity of traditional material welding joints. While making the joint structure refined, it also takes into account the synergy of the damping properties and mechanical properties of the matrix alloy and the joint alloy. The welding material can exhibit excellent mechanical properties and damping properties after welding heat treatment. Under the argon protection welding conditions of the welded joint, the yield strength is 380MPa, the tensile strength is 530MPa, the elongation is 25%, and the damping coefficient SDC is 30% without heat treatment; after heat treatment, the yield strength is 420MPa, the tensile strength is 570MPa, the elongation is 30%, and the damping coefficient is 42%. It can completely achieve mechanical properties and damping properties similar to those of the parent material. In addition, the welded joint of the material has excellent stress corrosion resistance. Tested in artificial seawater, the cracking time is 70 days at 180MPa. Under the same conditions, the joint welded with a high manganese content manganese copper damping alloy base material has a cracking time of 5-6 days under the same conditions. Therefore, in terms of the stability of the joint under corrosive conditions, the joint material of the patent application has excellent stability in use.

[0034] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

Claims

1. A welding material for high manganese content manganese-copper damping alloys, characterized in that: The welding material consists of the following elements in mass percentage Composition: Mn: 50%-70%, Ni: 4%-6%, Fe: 1%-3%, Al: 2%-6%, Sr: 2%-4%, Cu: 20-21%, Mg: 5%-7%, Zn: 3%-5%, and the remainder is impurity elements.

2. The welding material for high manganese content manganese-copper damping alloy according to claim 1, characterized in that: When the high manganese content manganese-copper damping alloys are welded, the welding material is ER308L.

3. A process for manufacturing the welding material for high manganese content manganese-copper damping alloys according to claim 1, characterized in that: include: (1) Allocate each raw material according to mass percentage; (2) placing the prepared materials into a vacuum induction furnace for smelting, introducing argon as a protective gas, and smelting the materials; (3) After the smelted material is demolded and cooled, it is placed in a heat treatment furnace, slowly heated to 1000 degrees under vacuum, kept warm for 10 minutes, and stirred the alloy melt by electromagnetic stirring until it is uniform, and then introduced into a cast iron mold for casting; (4) hot rolling the alloy ingot after homogenization heat treatment at 820-850° C. and keeping the temperature for 3 h; (5) After keeping warm, the temperature is slowly lowered, and the rolled alloy is cut into welding materials of corresponding sizes. The cut welding materials are placed in a heat treatment furnace at 850°C, kept warm for 2 hours, and then placed in cold water for water cooling quenching to obtain the target material.

4. The process for manufacturing a welding material for high manganese content manganese-copper damping alloys according to claim 3, characterized in that: The rolled alloy has a thickness of 2-3 mm.

5. The process for manufacturing a welding material for high manganese content manganese-copper damping alloys according to claim 3, characterized in that: The rolled alloy has a thickness of 1-2 mm.

6. The process for manufacturing a welding material for high manganese content manganese-copper damping alloys according to claim 3, characterized in that: The mass percentages of the raw materials in step 1 are: Mn: 55%-65%, Ni: 4%-5%, Fe: 2%-3%, Al: 4%-5%, Sr: 3%-4%, Cu: 20-21%, Mg: 5%-6%, Zn: 4%-4.5%, and impurity elements do not exceed 1%.

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