CN109967812B - Brazing connection method of CoCrCuFeNi high-entropy alloy - Google Patents
Brazing connection method of CoCrCuFeNi high-entropy alloy Download PDFInfo
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- CN109967812B CN109967812B CN201910272585.5A CN201910272585A CN109967812B CN 109967812 B CN109967812 B CN 109967812B CN 201910272585 A CN201910272585 A CN 201910272585A CN 109967812 B CN109967812 B CN 109967812B
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- entropy alloy
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- cocrcufeni
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/008—Soldering within a furnace
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/20—Preliminary treatment of work or areas to be soldered, e.g. in respect of a galvanic coating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/20—Preliminary treatment of work or areas to be soldered, e.g. in respect of a galvanic coating
- B23K1/206—Cleaning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
- B23K35/302—Cu as the principal constituent
Abstract
The invention discloses a brazing connection method of a CoCrCuFeNi high-entropy alloy, which comprises the steps of carrying out ultrasonic cleaning on a welded CoCrCuFeNi high-entropy alloy plate, filling brazing filler metal consisting of Co, Cr, Cu, Fe, Ni, Zn, Mn, Ag, Si and Sn between two to-be-welded high-entropy alloy plates, placing the high-entropy alloy plates in a vacuum furnace for heating and heat preservation, and carrying out natural cooling to finish the brazing connection of the CoCrCuFeNi high-entropy alloy. The alloy of the CoCrCuFeNi high-entropy alloy after brazing has higher strength and plasticity, and can ensure that the alloy can be effectively connected in the engineering application process.
Description
Technical Field
The invention relates to a brazing connection technology, in particular to a brazing connection method capable of realizing CoCrCuFeNi high-entropy alloy.
Background
The high-entropy alloy is a novel alloy system. The method breaks through the material design concept that the traditional material is mainly made of a certain alloy element, the whole alloy is composed of elements with equal atomic ratios, and the finally formed material has extremely high mixed entropy. The high mixing entropy promotes the mixing among elements, so that the alloy phase composition forms a single solid solution structure, such as a single body-centered cubic or face-centered cubic structure, or a mixed structure of the two, and the formation of brittle intermetallic compounds is inhibited. The metal structure has excellent mechanical properties, so that the metal structure has properties incomparable with the traditional alloy, such as high strength, high hardness, high wear resistance and corrosion resistance, high heat resistance and electric resistance, and excellent magnetic properties. The CoCrCuFeNi high-entropy alloy is a high-entropy alloy system which is researched at the earliest, and the alloy has good toughness, moderate light degree and certain application prospect. However, less work has been done on the braze joint of the alloy, limiting the application of the alloy.
Disclosure of Invention
The invention aims to provide a brazing connection method of a CoCrCuFeNi high-entropy alloy. Ensure the effective connection of the alloy in the engineering application process.
The technical scheme of the invention is as follows: a brazing connection method of a CoCrCuFeNi high-entropy alloy comprises the steps of carrying out ultrasonic cleaning on welded CoCrCuFeNi high-entropy alloy plates, filling brazing filler metal consisting of Co, Cr, Cu, Fe, Ni, Zn, Mn, Ag, Si and Sn between two to-be-welded high-entropy alloy plates, placing the high-entropy alloy plates in a vacuum furnace for heating and heat preservation, and carrying out natural cooling to finish brazing connection of the CoCrCuFeNi high-entropy alloy.
The brazing connection method of the CoCrCuFeNi high-entropy alloy comprises the following components in percentage by mass in a brazing filler metal consisting of Co, Cr, Cu, Fe, Ni, Zn, Mn, Ag, Si and Sn: 3-6% of Co, 3-6% of Cr, 40-60% of Cu, 3-6% of Fe, 3-6% of Ni, 0.01-0.1% of Mn, 0.1-0.5% of Ag, 0.05-0.4% of Si, 0.1-1.5% of Sn and the balance of Zn.
The brazing connection method of the CoCrCuFeNi high-entropy alloy comprises the following components in percentage by mass in a brazing filler metal consisting of Co, Cr, Cu, Fe, Ni, Zn, Mn, Ag, Si and Sn: 4-5% of Co, 4-5% of Cr, 45-55% of Cu, 4-5% of Fe, 4-5% of Ni, 0.03-0.08% of Mn, 0.2-0.4% of Ag, 0.07-0.34% of Si, 0.3-1.2% of Sn and the balance of Zn.
The brazing connection method of the CoCrCuFeNi high-entropy alloy comprises the following components in percentage by mass in a brazing filler metal consisting of Co, Cr, Cu, Fe, Ni, Zn, Mn, Ag, Si and Sn: 4.5% of Co, 4.5% of Cr, 50% of Cu, 4.5% of Fe, 4.5% of Ni, 0.05% of Mn, 0.3% of Ag, 0.2% of Si, 0.7% of Sn and the balance of Zn.
The brazing connection method of the CoCrCuFeNi high-entropy alloy comprises the steps of placing a high-entropy alloy plate in a vacuum furnace for heating and heat preservation, wherein the heat preservation temperature is 600-1200 ℃, the heat preservation time is 10-60 minutes, and the vacuum degree is 10-4-1Pa。
The brazing connection method of the CoCrCuFeNi high-entropy alloy comprises the steps of heating and insulating an alloy plate in a vacuum furnace, wherein the insulation temperature is 900 ℃, the insulation time is 30 minutes, and the vacuum degree is 10-3Pa。
In the brazing connection method of the CoCrCuFeNi high-entropy alloy, the surface of the alloy plate is completely covered by the brazing filler metal and compacted in the brazing filler metal filling process.
In the brazing connection method of the CoCrCuFeNi high-entropy alloy, the ultrasonic cleaning time of the high-entropy alloy plate is 30 minutes.
The invention has the beneficial effects that: compared with the prior art, the brazing connection method of the CoCrCuFeNi high-entropy alloy has higher strength and plasticity after being welded. The applicant tests the parent metal strength and plasticity values of the CoCrCuFeNi high-entropy alloy and the high-entropy alloy welded in the examples 1, 2 and 3 respectively, 10 times of each group, averages the test results, and records the test results, which are shown in Table 1.
Table 1 results of performance testing
As can be seen from the table, the mechanical properties of the CoCrCuFeNi high-entropy alloy after welding in examples 1, 2 and 3 are close to those of the base metal.
In conclusion, the brazed CoCrCuFeNi high-entropy alloy has higher strength and plasticity, and can ensure that the alloy can be effectively connected in the engineering application process.
Detailed Description
The present invention is further illustrated by the following examples, which are not to be construed as limiting the invention.
Example 1 of the invention:
two pieces of CoCrCuFeNi high-entropy alloy with the size of 250 multiplied by 50 multiplied by 3 mm are brazed and connected.
The welding process comprises the following steps: and (3) polishing the surface of the high-entropy alloy to be flat, ultrasonically cleaning the surface of the high-entropy alloy for 30 minutes by using acetone, uniformly spreading the brazing filler metal on the surface of one of the alloys, and pressing the other alloy on the brazing filler metal. Putting the to-be-welded piece into a vacuum resistance furnace for heating, wherein the vacuum degree is 10-4Pa. And (4) heating to 900 ℃, keeping the temperature for 30 minutes, and then cooling along with the furnace to finish welding.
The solder comprises the following components: 4.5% of Co, 4.5% of Cr, 50% of Cu, 4.5% of Fe, 4.5% of Ni, 0.05% of Mn, 0.3% of Ag, 0.2% of Si, 0.7% of Sn and the balance of Zn.
Example 2 of the invention:
two pieces of CoCrCuFeNi high-entropy alloy with the size of 300 multiplied by 10 multiplied by 5 and 400 multiplied by 10 multiplied by 4 mm are connected by brazing;
the welding process comprises the following steps: and (3) polishing and flattening the surface of the high-entropy alloy, ultrasonically cleaning the surface by using acetone for 30 minutes, spreading the brazing filler metal between the two alloy plates according to the mode of the embodiment 1, and compacting the brazing filler metal. And (3) putting the to-be-welded piece into an induction heating vacuum electric furnace, rapidly heating to 950 ℃ under the vacuum degree of 1Pa, preserving heat for 50 minutes, then cutting off the power, cooling and finishing welding.
The solder comprises the following components: co 3%, Cr 3%, Cu 40%, Fe 4.5%, Ni 3%, Mn 0.09%, Ag 0.5%, Si 0.4%, Sn 1.4%, and the balance of Zn.
Example 3 of the invention:
two pieces of CoCrCuFeNi high-entropy alloy with the size of 800 multiplied by 100 multiplied by 3 and 20 multiplied by 100 multiplied by 3 millimeters are connected by brazing;
the welding process comprises the following steps: and (3) polishing and flattening the surface of the high-entropy alloy, ultrasonically cleaning the surface by using acetone for 30 minutes, spreading the brazing filler metal between the two alloy plates according to the mode of the embodiment 1, and compacting the brazing filler metal. Putting the workpiece to be welded into a resistance-heated vacuum electric furnace with the vacuum degree of 10-3And Pa, rapidly heating to 1100 ℃, preserving heat for 20 minutes, then powering off, cooling and finishing welding.
The solder comprises the following components: co 6%, Cr 6%, Cu 60%, Fe 6%, Ni 6%, Mn 0.01%, Ag 0.1%, Si 0.05%, Sn 0.1%, and the balance of Zn.
Example 4 of the invention:
two pieces of CoCrCuFeNi high-entropy alloy with the size of 10 multiplied by 60 multiplied by 3 and 250 multiplied by 60 multiplied by 3 mm are connected by brazing;
the welding process comprises the following steps: and (3) polishing and flattening the surface of the high-entropy alloy, ultrasonically cleaning the surface by using acetone for 30 minutes, spreading the brazing filler metal between the two alloy plates according to the mode of the embodiment 1, and compacting the brazing filler metal. Putting the part to be welded into a vacuum electric furnace heated by a silicon carbide rod, wherein the vacuum degree is 10-2Pa, rapidly heating to 600 ℃, preserving heat for 60 minutes, then cutting off the power, cooling, and finishingAnd (6) welding.
The solder comprises the following components: 3.1% of Co, 3.3% of Cr, 41% of Cu, 3.4% of Fe, 3.5% of Ni, 0.1% of Mn, 0.5% of Ag, 0.4% of Si, 0.7% of Sn and the balance of Zn.
Example 5 of the invention:
two pieces of CoCrCuFeNi high-entropy alloy with the size of 80 multiplied by 70 multiplied by 3 and 200 multiplied by 70 multiplied by 3 mm are connected by brazing;
the welding process comprises the following steps: and (3) polishing and flattening the surface of the high-entropy alloy, ultrasonically cleaning the surface by using acetone for 30 minutes, spreading the brazing filler metal between the two alloy plates according to the mode of the embodiment 1, and compacting the brazing filler metal. Putting the workpiece to be welded into a vacuum electric furnace for heating a silicon-molybdenum rod, wherein the vacuum degree is 10-1And Pa, rapidly heating to 1200 ℃, preserving heat for 10 minutes, then cutting off the power, cooling and finishing welding.
The solder comprises the following components: co 4%, Cr 5%, Cu 50%, Fe 4%, Ni 6%, Mn 0.07%, Ag 0.4%, Si 0.3%, Sn 1.2%, and the balance of Zn.
Example 6 of the invention:
two pieces of CoCrCuFeNi high-entropy alloy with the size of 250 multiplied by 50 multiplied by 3 mm are connected by brazing;
the welding process comprises the following steps: and (3) polishing and flattening the surface of the high-entropy alloy, ultrasonically cleaning the surface by using acetone for 30 minutes, spreading the brazing filler metal between the two alloy plates according to the mode of the embodiment 1, and compacting the brazing filler metal. Putting the workpiece to be welded into a vacuum electric furnace for heating a silicon-molybdenum rod, wherein the vacuum degree is 10-3And Pa, rapidly heating to 900 ℃, preserving heat for 30 minutes, then cutting off the power, cooling and finishing welding.
The solder comprises the following components: 4.5% of Co, 4.5% of Cr, 50% of Cu, 4.5% of Fe, 4.5% of Ni, 0.05% of Mn, 0.3% of Ag, 0.2% of Si, 0.7% of Sn and the balance of Zn.
Claims (6)
1. A brazing connection method of a CoCrCuFeNi high-entropy alloy is characterized by comprising the following steps: ultrasonically cleaning a welded CoCrCuFeNi high-entropy alloy plate, filling brazing filler metal consisting of Co, Cr, Cu, Fe, Ni, Zn, Mn, Ag, Si and Sn between two to-be-welded high-entropy alloy plates, heating and preserving heat of the high-entropy alloy plates in a vacuum furnace at the temperature of 600-1200 ℃ for 10-60 minutesA void degree of 10-41Pa, and finishing the brazing connection of the CoCrCuFeNi high-entropy alloy after natural cooling;
the brazing filler metal consists of Co, Cr, Cu, Fe, Ni, Zn, Mn, Ag, Si and Sn, and comprises the following components in percentage by mass: co 3-6%, Cr 3-6%, Cu 40-60%, Fe 3-6%, Ni 3-6%, Mn 0.01-0.1%, Ag 0.1-0.5%, Si 0.05-0.4%, Sn 0.1-1.5%, and Zn in balance.
2. The brazing connection method of the CoCrCuFeNi high-entropy alloy as claimed in claim 1, wherein: the brazing filler metal consists of Co, Cr, Cu, Fe, Ni, Zn, Mn, Ag, Si and Sn, and comprises the following components in percentage by mass: 4-5% of Co, 4-5% of Cr, 45-55% of Cu, 4-5% of Fe, 4-5% of Ni, 0.03-0.08% of Mn, 0.2-0.4% of Ag, 0.07-0.34% of Si, 0.3-1.2% of Sn and the balance of Zn.
3. The brazing connection method of the CoCrCuFeNi high-entropy alloy as claimed in claim 2, wherein: the brazing filler metal consists of Co, Cr, Cu, Fe, Ni, Zn, Mn, Ag, Si and Sn, and comprises the following components in percentage by mass: 4.5% of Co, 4.5% of Cr, 50% of Cu, 4.5% of Fe, 4.5% of Ni, 0.05% of Mn, 0.3% of Ag, 0.2% of Si, 0.7% of Sn and the balance of Zn.
4. The brazing connection method of the CoCrCuFeNi high-entropy alloy as claimed in claim 1, wherein: heating the alloy plate in a vacuum furnace, and keeping the temperature at 900 ℃ for 30 minutes and the vacuum degree at 10-3Pa。
5. The brazing connection method of the CoCrCuFeNi high-entropy alloy as claimed in claim 1, wherein: during the brazing filler metal filling process, the surface of the alloy plate is completely covered by the brazing filler metal and compacted.
6. The brazing connection method of the CoCrCuFeNi high-entropy alloy as claimed in claim 1, wherein: the ultrasonic cleaning time of the high-entropy alloy plate is 30 minutes.
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| CN110405300B (en) * | 2019-07-29 | 2021-04-27 | 浙江工业大学 | Method for preparing high-strength AlCoCrFeNi high-entropy alloy joint by adopting Ni-based brazing filler metal |
| CN111101045A (en) * | 2020-01-03 | 2020-05-05 | 余果润 | High-entropy alloy material and preparation method thereof |
| CN111922468A (en) * | 2020-07-07 | 2020-11-13 | 安徽工程大学 | SiC ceramic brazing method based on multi-element high-entropy alloy and brazing material |
| CN115106675B (en) * | 2022-08-09 | 2024-02-27 | 哈尔滨工业大学（威海） | High-entropy brazing filler metal, preparation method thereof and application thereof in brazing |
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| CN103252568B (en) * | 2013-04-23 | 2016-01-20 | 上海工程技术大学 | A kind of for filling spot welding stainless steel high-entropy alloy powder and the stainless process of a kind of high-entropy alloy powder filling spot welding |
| TWI692382B (en) * | 2016-01-27 | 2020-05-01 | 史達克公司 | High-entropy alloy wire and multi-principal element alloy wire, and the preform, manufacture method and application thereof |
| US10640854B2 (en) * | 2016-08-04 | 2020-05-05 | Honda Motor Co., Ltd. | Multi-material component and methods of making thereof |
| CN107363359A (en) * | 2017-08-09 | 2017-11-21 | 北京工业大学 | A kind of method of compound high-entropy alloy solder ceramic soldering and metal |
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