CN114178737A - Novel composite brazing filler metal and preparation method thereof - Google Patents
Novel composite brazing filler metal and preparation method thereof Download PDFInfo
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- CN114178737A CN114178737A CN202111644800.3A CN202111644800A CN114178737A CN 114178737 A CN114178737 A CN 114178737A CN 202111644800 A CN202111644800 A CN 202111644800A CN 114178737 A CN114178737 A CN 114178737A
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- 239000002184 metal Substances 0.000 title claims abstract description 84
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 84
- 238000005219 brazing Methods 0.000 title claims abstract description 75
- 239000002131 composite material Substances 0.000 title claims abstract description 68
- 239000000945 filler Substances 0.000 title claims abstract description 57
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 238000006263 metalation reaction Methods 0.000 title description 2
- 239000002245 particle Substances 0.000 claims abstract description 64
- 239000010432 diamond Substances 0.000 claims abstract description 52
- 229910003460 diamond Inorganic materials 0.000 claims abstract description 51
- 229910000679 solder Inorganic materials 0.000 claims abstract description 44
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 24
- 239000000956 alloy Substances 0.000 claims abstract description 24
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 63
- 238000010438 heat treatment Methods 0.000 claims description 15
- 238000000498 ball milling Methods 0.000 claims description 11
- 239000000843 powder Substances 0.000 claims description 11
- 229910000831 Steel Inorganic materials 0.000 claims description 10
- 239000010959 steel Substances 0.000 claims description 10
- 239000013078 crystal Substances 0.000 claims description 8
- 229940057995 liquid paraffin Drugs 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 229910052759 nickel Inorganic materials 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 235000011837 pasties Nutrition 0.000 claims description 4
- 238000004321 preservation Methods 0.000 claims description 4
- 239000011159 matrix material Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000002708 enhancing effect Effects 0.000 abstract 1
- 239000000758 substrate Substances 0.000 description 6
- 230000008569 process Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001000 micrograph Methods 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- 238000001069 Raman spectroscopy Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011858 nanopowder Substances 0.000 description 1
- 230000006911 nucleation Effects 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- 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
- B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
- B23K35/0222—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in soldering, brazing
- B23K35/0244—Powders, particles or spheres; Preforms made therefrom
- B23K35/025—Pastes, creams, slurries
-
- 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
- B23K35/3033—Ni as the principal constituent
-
- 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
- B23K35/40—Making wire or rods for soldering or welding
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Polishing Bodies And Polishing Tools (AREA)
Abstract
The invention belongs to the field of manufacturing of brazed diamond tools, and particularly discloses a novel composite brazing filler metal, which is a brazed diamond tool prepared by adding a proper amount of micron-sized spherical metal Mo particles on the basis of a Ni-based alloy brazing filler metal, wherein the components of the composite brazing filler metal comprise 90-98% of the Ni-based alloy brazing filler metal and 2-10% of doped phase metal Mo particles in volume ratio, and the Ni-based composite brazing filler metal is doped with the Mo particles. The novel composite solder and the preparation method thereof have the beneficial effects that: the number of microcracks on the joint interface is greatly reduced, and the residual stress in the diamond is obviously relieved; meanwhile, the composite solder maintains good wettability to diamond particles under the condition of adding a proper amount of doping matching ratio, and greatly improves the connection strength of the brazed diamond joint interface, thereby enhancing the processing performance and the service life of the brazed diamond.
Description
Technical Field
The invention belongs to the field of manufacturing of brazed diamond tools, and particularly relates to a novel composite brazing filler metal and a preparation method thereof.
Background
Diamond-bonded tools have shown significant utility in the processing of hard and brittle ceramic materials. Compared with traditional electroplated, sintered or resin bonded diamond tools, brazed diamond tools have the following advantages: 1. the bonding strength between the diamond, the alloy solder and the tool substrate is high, and diamond particles are not easy to fall off; 2. the exposure of diamond particles is high, so that the abrasive dust is conveniently discharged and cooling liquid is conveniently fed; 3 the diamond particles can be arranged orderly on the tool substrate. These advantages significantly improve the workability and life of the diamond tool.
The three alloy solders of Cu-based, Ag-based and Ni-based can be used for soldering diamond particles, but the Cu-based and Ag-based alloy solders have the defects of high manufacturing cost, high temperature performance and the like, so that the Cu-based and Ag-based alloy solders are not suitable for mass engineering manufacturing of practical soldered diamond tools. The Ni-based alloy brazing filler metal is the preferred brazing filler metal for manufacturing brazed diamond tools by virtue of the advantages of high mechanical strength, low cost, corrosion resistance, high temperature resistance and the like. However, the adverse effects of the Ni-based alloy filler metal during brazing are not negligible. Among them, the introduction of residual stress during brazing cooling is an important factor that severely restricts the workability of brazed diamonds. The difference between the thermal expansion coefficient and the young's modulus among the diamond particles, the Ni-based brazing filler metal and the steel substrate is a main cause of occurrence of residual stress. Excessive residual stress causes a large number of microcracks at the surface of the diamond particles and at the interface of the connection. In the use process of the brazing diamond tool, under the action of impact load, microcracks are rapidly and continuously expanded, and finally, premature transgranular fracture of diamond particles occurs, so that the processing performance and the service life of the brazing diamond tool are seriously reduced.
Therefore, it is necessary to develop a simple and effective method for reducing the residual stress and interfacial microcracks caused by Ni-based alloy solders.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide a novel composite brazing filler metal and a preparation method thereof, and provides a Mo particle doped Ni-based composite brazing filler metal for a brazed diamond tool, which is used for improving the interface strength of a brazed diamond joint.
The technical scheme is as follows: the invention provides a novel composite solder, which comprises a Ni-based alloy solder body and metal Mo particles, wherein the components of the composite solder comprise 90-98% of Ni-based alloy solder and 2-10% of metal Mo particles according to the volume ratio.
According to the technical scheme of the invention, the Ni-based alloy brazing filler metal body comprises 83% of Ni, 7% of Cr, 4% of Fe, 3% of Si and 3% of B by mass, and the volume percentage of metal Mo particles in the Ni-based composite brazing filler metal is as follows: 2 to 10 percent.
According to the technical scheme, the Ni-based brazing filler metal and the metal Mo particles are micron-sized spherical powder, wherein the particle size of the Ni-based brazing filler metal is 45-53 mu m, the particle size of the metal Mo particles is 5-10 mu m, and the purity of the metal Mo particles is larger than or equal to 99%.
According to the technical scheme of the invention, the Mo particle doped Ni-based composite brazing filler metal is used for brazing the artificial single crystal diamond to 1045 steel in a vacuum resistance heating furnace.
According to the technical scheme, the grain size of the brazed artificial single crystal diamond is 420-doped 500 mu m, and the thickness of the Mo-particle-doped Ni-based composite brazing filler metal coated on a 1045 steel substrate is 200 mu m.
According to the technical scheme of the invention, the highest brazing temperature in the vacuum resistance heating furnace is as follows: 1025 ℃, heat preservation time: 15min, vacuum degree in the furnace: 1' 10-3Pa。
According to the technical scheme of the invention, the heating rate in the vacuum resistance heating furnace is 10 ℃/min, and the temperature is naturally cooled to room temperature along with the furnace.
The invention also provides a preparation method of the novel composite solder, which comprises the following steps: step 1), taking 90-98% of nickel-based alloy brazing filler metal body and 2-10% of Mo particles according to volume parts. And 2) mechanically ball-milling the two micron-sized spherical powders to uniformly mix the two micron-sized spherical powders. And 3) dripping a proper amount of liquid paraffin into the ball-milled Mo particle-doped Ni-based composite solder to prepare the pasty composite solder.
According to the technical scheme, in the step 2), the rotating speed of a ball mill is 500r/min, the ball-material ratio is 10:1, and the mechanical ball milling time is 60 min.
Compared with the prior art, the novel composite solder and the preparation method thereof have the beneficial effects that: (1) the doping phase is micron-sized spherical metal Mo particles, and the Mo particle doped Ni-based composite brazing filler metal formed by mechanical ball milling can effectively improve the interface strength of a brazed diamond joint. Micron-sized metal Mo particles are uniformly distributed in the composite solder, and the Mo particles play a role of hard nucleation points in the cooling and solidifying process of the composite solder, so that the metallographic structure of the Ni composite solder is refined. Meanwhile, the unmelted metal Mo particles also play a role in dispersion strengthening of the Ni-based composite solder, and the wear resistance of the Ni-based composite solder is improved.
(2) The micron-sized metal Mo particles have the characteristics of low thermal expansion coefficient and moderate Young modulus, the great difference between diamond and Ni-based alloy solder and 1045 steel matrix in the two aspects is effectively neutralized, the residual stress at the brazing interface is successfully relieved, the occurrence of microcracks is greatly reduced due to the reduction of the residual stress, and the interface connection strength of the brazed diamond joint is greatly improved.
(3) The volume percentage of the doped phase Mo particles in the Ni composite solder is 2-10%. When the volume ratio of the Mo particles is less than 4%, the degree of relieving the residual stress in the brazed diamond joint is not obvious. When the volume percentage of Mo particles is higher than 7%, although the internal residual stress relief degree of the brazed diamond joint is obvious, the flowability of the Ni-based composite brazing filler metal is obviously reduced, the wettability of the composite brazing filler metal to diamond is seriously influenced, and the brazing effect is not ideal. The applicant verifies through experiments of the brazed diamond tool that when the Mo particle accounts for 6%, the Ni composite brazing filler metal not only maintains good wettability, but also obviously relieves the residual stress in the brazed diamond, and the brazing interface and micro cracks around the diamond are greatly reduced.
(4) The invention can directly prepare the Ni-based alloy brazing filler metal body and the doped phase metal Mo particles into the uniformly mixed composite brazing filler metal through mechanical ball milling, has simple and efficient operation and low production cost, is convenient to smear the pasty Mo particle doped nickel-based composite brazing filler metal prepared by dropping a proper amount of liquid paraffin, is easy to store and is not easy to lose efficacy. Therefore, the invention has wide application prospect in the field of brazing diamond tools.
Drawings
FIG. 1 is a schematic view of a Mo particle doped Ni-based composite solder in an embodiment of the invention;
FIG. 2 is a graph of the internal maximum residual stress of Mo particle doped Ni based composite braze brazed diamond particles in an embodiment of the present invention;
FIG. 3 is a scanning electron microscope image of a Mo particle doped Ni-based composite solder brazing diamond in an embodiment of the invention;
FIG. 4 is a scanning electron microscope image of the surface generated carbides of the Mo particle doped Ni-based composite solder brazed diamond in the embodiment of the invention;
the numbers in the figure are as follows: 1-brazing filler metal and 2-micro nano powder.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The novel composite solder shown in the figures 1, 2, 3 and 4 comprises a Ni-based alloy solder body and metal Mo particles, wherein the components of the composite solder comprise 90-98% of Ni-based alloy solder and 2-10% of metal Mo particles according to the volume ratio.
Preferably, the Ni-based alloy brazing filler metal body comprises 83% of Ni, 7% of Cr, 4% of Fe, 3% of Si and 3% of B by mass ratio, and the volume percentage of the metal Mo particles in the Ni-based composite brazing filler metal is as follows: 2 to 10 percent.
Preferably, the Ni-based brazing filler metal and the metal Mo particles are micron-sized spherical powder, wherein the particle size of the Ni-based brazing filler metal is 45-53 mu m, the particle size of the metal Mo particles is 5-10 mu m, and the purity of the metal Mo particles is larger than or equal to 99%.
Preferably, the Mo particle-doped Ni-based composite brazing filler metal is used for brazing the artificial single crystal diamond to 1045 steel in a vacuum resistance heating furnace.
According to the novel composite solder, the preferred particle size of the brazed artificial single crystal diamond is 420-500 mu m, and the thickness of the Mo particle doped Ni-based composite solder coated on a 1045 steel substrate is 200 mu m.
Hair brushPreferably, the highest brazing temperature in the vacuum resistance heating furnace is as follows: 1025 ℃, heat preservation time: 15min, vacuum degree in the furnace: 1' 10-3Pa。
The novel composite solder is preferably selected, the heating rate in the vacuum resistance heating furnace is 10 ℃/min, and the temperature is naturally cooled to the room temperature along with the furnace.
The preparation method of the novel composite brazing filler metal comprises the following steps: step 1), taking 90-98% of nickel-based alloy brazing filler metal body and 2-10% of Mo particles according to volume parts. And 2) mechanically ball-milling the two micron-sized spherical powders to uniformly mix the two micron-sized spherical powders. And 3) dripping a proper amount of liquid paraffin into the ball-milled Mo particle-doped Ni-based composite solder to prepare the pasty composite solder.
Preferably, in the step 2), the rotating speed of a ball mill is 500r/min, the ball-to-material ratio is 10:1, and the mechanical ball milling time is 60 min.
Example 1: the invention relates to a preparation method of a novel composite solder (Mo particle doped Ni-based composite solder for soldering diamond tools),
step 1), taking 94 parts of Ni-based alloy solder and 6 parts of metal Mo particles according to volume fraction ratio.
And 2) carrying out ball milling on the two kinds of spherical metal powder to uniformly mix the two kinds of spherical metal powder, wherein the rotating speed of a mill is 500r/min, the ball-material ratio is 10:1, and the mechanical ball milling time is 60 min.
And 3) dripping a proper amount of liquid paraffin into the Mo particle-doped nickel-based composite solder after the ball milling is finished, and preparing the composite solder paste.
Step 4): coating Mo particle-doped Ni-based composite brazing filler metal on a 1045 steel substrate to a thickness of 200 mu m, brazing the single crystal artificial diamond to the 1045 steel in a vacuum resistance heating furnace, wherein the highest brazing temperature is 1025 ℃, the heat preservation time is 15min, and the vacuum degree in the furnace is 1' 10-3Pa, the heating rate in the vacuum resistance heating furnace is 10 ℃/min, and the temperature is naturally cooled to the room temperature along with the furnace.
The Mo particle-doped Ni-based composite brazing filler metal prepared in example 1 had good wettability to the artificial single crystal diamond after brazing, and the brazing filler metal alloy climbed upward along the diamond surface to form a hill-like profile, providing a strong holding force to the diamond particles. The diamond particles and the base composite solder are subjected to chemical reaction in the brazing process, and carbide is generated on the surface of the diamond. Meanwhile, the residual stress inside the diamond joint measured by the Raman spectroscopy is obviously reduced, the number of microcracks on the interface is greatly reduced, and the joint connection strength is obviously improved.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (9)
1. The novel composite brazing filler metal is characterized in that: the composite brazing filler metal comprises a Ni-based alloy brazing filler metal body and metal Mo particles, wherein the components of the composite brazing filler metal comprise 90-98% of Ni-based alloy brazing filler metal and 2-10% of metal Mo particles according to the volume ratio.
2. The novel composite brazing filler metal according to claim 1, wherein: the Ni-based alloy brazing filler metal body comprises 83% of Ni, 7% of Cr, 4% of Fe, 3% of Si and 3% of B by mass, and the metal Mo particles account for the Ni-based composite brazing filler metal in the following volume percentage: 2 to 10 percent.
3. The novel composite brazing filler metal according to claim 1, wherein: the Ni-based brazing filler metal and the metal Mo particles are micron-sized spherical powder, wherein the particle size of the Ni-based brazing filler metal is 45-53 mu m, the particle size of the metal Mo particles is 5-10 mu m, and the purity of the metal Mo particles is not less than 99%.
4. The novel composite brazing filler metal according to claim 1, wherein: the artificial single crystal diamond is brazed to 1045 steel in a vacuum resistance heating furnace by using the Mo particle doped Ni-based composite brazing filler metal.
5. The novel composite brazing filler metal according to claim 4, wherein: the grain size of the brazing artificial single crystal diamond is 420-500 mu m, and the thickness of the Mo-particle-doped Ni-based composite brazing filler metal coated on the 1045 steel matrix is 200 mu m.
6. The novel composite brazing filler metal according to claim 4, wherein: the highest brazing temperature in the vacuum resistance heating furnace is as follows: 1025 ℃, heat preservation time: 15min, vacuum degree in the furnace: 1' 10-3Pa。
7. The novel composite brazing filler metal according to claim 4, wherein: the heating rate in the vacuum resistance heating furnace is 10 ℃/min, and the temperature is naturally cooled to the room temperature along with the furnace.
8. A preparation method of a novel composite solder is characterized by comprising the following steps: the method comprises the following steps:
step 1), taking 90-98% of nickel-based alloy solder body and 2-10% of Mo particles according to volume parts;
step 2), mechanically ball-milling the two micron-sized spherical powders to uniformly mix the two micron-sized spherical powders;
and 3) dripping a proper amount of liquid paraffin into the ball-milled Mo particle-doped Ni-based composite solder to prepare the pasty composite solder.
9. The novel composite brazing filler metal according to claim 8, wherein: in the step 2), the rotating speed of the ball mill is 500r/min, the ball-material ratio is 10:1, and the mechanical ball milling time is 60 min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111644800.3A CN114178737A (en) | 2021-12-30 | 2021-12-30 | Novel composite brazing filler metal and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111644800.3A CN114178737A (en) | 2021-12-30 | 2021-12-30 | Novel composite brazing filler metal and preparation method thereof |
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Citations (9)
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|---|---|---|---|---|
| US4968326A (en) * | 1989-10-10 | 1990-11-06 | Wiand Ronald C | Method of brazing of diamond to substrate |
| JPH04182366A (en) * | 1990-11-17 | 1992-06-29 | Hirohiko Omura | Structural body brazed with diamond and its production |
| US20030084894A1 (en) * | 1997-04-04 | 2003-05-08 | Chien-Min Sung | Brazed diamond tools and methods for making the same |
| CN101890593A (en) * | 2010-07-23 | 2010-11-24 | 安泰科技股份有限公司 | Nickel-based brazing material for brazed diamond tool and preparation method thereof |
| US20170191315A1 (en) * | 2015-06-25 | 2017-07-06 | Halliburton Energy Services, Inc. | Braze joints with a dispersed particulate microstructure |
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| CN109877413A (en) * | 2019-02-01 | 2019-06-14 | 北方民族大学 | A kind of brazing material and method for welding for SiC ceramic soldering |
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-
2021
- 2021-12-30 CN CN202111644800.3A patent/CN114178737A/en active Pending
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