CN116117147A - Tightly coupled circular seam nozzle and processed particle reinforced cobalt-based metal powder thereof - Google Patents
Tightly coupled circular seam nozzle and processed particle reinforced cobalt-based metal powder thereof Download PDFInfo
- Publication number
- CN116117147A CN116117147A CN202211361822.3A CN202211361822A CN116117147A CN 116117147 A CN116117147 A CN 116117147A CN 202211361822 A CN202211361822 A CN 202211361822A CN 116117147 A CN116117147 A CN 116117147A
- Authority
- CN
- China
- Prior art keywords
- nozzle
- metal powder
- guide pipe
- equal
- blocking
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/06—Metallic powder characterised by the shape of the particles
- B22F1/065—Spherical particles
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/07—Alloys based on nickel or cobalt based on cobalt
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
- C22C32/0047—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents
- C22C32/0052—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents only carbides
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
- C22C32/0047—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents
- C22C32/0052—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents only carbides
- C22C32/0063—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents only carbides based on SiC
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Nanotechnology (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
Abstract
The invention relates to the field of metal powder preparation equipment, in particular to a tightly coupled circular seam nozzle and a processed particle reinforced cobalt-based metal powder tightly coupled circular seam nozzle. Aims at providing a tight coupling circular seam nozzle which can automatically prevent blockage and has better powder preparation effect. According to the invention, the metal fluid is communicated in the guide pipe, the nozzle body is sleeved outside the guide pipe, a hollow air cavity is arranged in the nozzle body, the air cavity comprises an air inlet penetrating through the side wall of the nozzle, a steel-covered jet striking hole and an atomization breaking striking hole which face the metal flow are formed, and an anti-blocking striking hole which can automatically form and impact steel-covered is also formed, and a linkage mechanism is arranged between the anti-blocking striking hole and the guide pipe so as to form an anti-blocking striking air passage channel when steel-covered is formed.
Description
Technical Field
The invention relates to the field of metal powder preparation equipment, in particular to a tightly coupled circular seam nozzle and a processed particle reinforced cobalt-based metal powder tightly coupled circular seam nozzle.
Background
Cobalt-based alloys are hard alloys that are resistant to various types of wear and corrosion and high temperature oxidation. The coating has excellent high-temperature resistance, wear resistance and corrosion resistance, and is a good coating material for surface modification under complex and severe working conditions.
With the development of technologies such as metal 3D printing and ultra-high speed laser cladding, the demand and quality requirements for particle-reinforced cobalt-based alloy powder are higher and higher, and people are urgent to adopt an efficient method to prepare high-quality alloy powder. One of the current methods suitable for mass production of high-quality powder is a vacuum induction melting gas atomization powder process, which can prepare metal powder with high sphericity and low oxygen content, and the key factor determining the quality of the powder is the design of a nozzle structure. The tightly coupled nozzle has compact structure and complex design, but the nozzle structure obviously shortens the action distance of gas flow and metal liquid flow, so that the atomization efficiency is obviously improved, and the tightly coupled nozzle is suitable for mass production, and therefore, the tightly coupled nozzle is widely applied at present. The key of the tight coupling circular seam nozzle for improving the atomization quality is that the gas flow outlet speed of the spray pipe, the attenuation degree of the gas flow speed of an atomization area and the interaction process of the gas flow of the nozzle outlet and the metal liquid flow enable the gas to be kept in a state with higher relative atomization efficiency, and the metal liquid flow is continuously and stably crushed, so that the purpose of improving the powder quality is achieved. In addition, in the design of the close-coupled nozzle, the atomization process of the method is that high-temperature metal liquid flow in the tundish flows into the bottom of the close-coupled nozzle through the guide pipe to interact with high-speed low-temperature gas jet formed by the air outlet channel of the circular seam spray pipe, and the liquid flow is broken and quickly solidified to form metal powder. The main disadvantage of this technology at this stage is that the metal powder yield is always low and unstable.
Aiming at the situation, the technicians in the field carry out multiparty improvement, such as a manufacturing method of a gas heating rotational flow type close-coupled circular seam nozzle applied by Beijing machine department national institute of lightweight science, which is named as a gas heating rotational flow type close-coupled circular seam nozzle, and through improvement of a flow guide pipe, rotational flow of liquid flow is realized, and further superposition of various vector forces on an impact surface is realized, so that powder making efficiency and powder making quality are improved.
For example, the application number is 201911323841.5, the novel close-coupled air atomization nozzle is named, the designed double-air-flow-channel close-coupled nozzle is suitable for large-capacity tundish anti-caking steel, and ultrafine spherical metal powder can be efficiently prepared. The nozzle tube required by spraying the molten steel of the large-capacity tundish Cheng Fang on the tight coupling nozzle is used for strongly sucking negative pressure conditions, and key factors such as supersonic speed airflow speed, angle, gas-liquid ratio and the like required by atomizing fine powder are ensured.
However, in long-term first-line work, the applicant has found that there is a need for improvement in the prior art, embodied as: 1. the properties of metal liquid flows generated by the powder preparation raw materials with different proportions are slightly different, and the optimal impact angle of each liquid flow is also different, so that the technical center is always in a one-material state in the prior art, and the metal liquid flows cannot be regulated and cannot reach the optimal treatment state even if the metal liquid flows are unsuitable; 2. in the double-channel structure, the impact of the second channel on the liquid flow is close to lateral direct collision, and the applicant finds that the impact force and the impact direction are not ideal after multiparty comparison; 3. the mist level after atomization is relatively uncontrollable.
Disclosure of Invention
The invention aims to solve the problems of the prior art, such as unsatisfactory powder forming effect, excessively strong equipment singleness and relatively uncontrollable station area, especially in the use process of a tightly-coupled circular seam nozzle.
The specific scheme of the invention is as follows:
the method comprises the steps of designing a tightly coupled circular seam nozzle, connecting metal fluid in a flow pipe, sleeving a nozzle body outside the flow pipe, wherein a hollow air cavity is arranged in the nozzle body, the air cavity comprises an air inlet penetrating through the side wall of the nozzle, a steel-covered jet striking hole and an atomization breaking striking hole group facing to the metal flow, and further comprises a steel-covered blocking striking hole capable of being automatically formed and impacted, and a linkage mechanism is arranged between the steel-covered striking hole and the flow pipe to form an anti-blocking striking air passage channel when steel-covered is formed;
the linkage mechanism comprises a spring arranged on the upper surface of the nozzle body, a protruding installation ring body is arranged on the guide pipe, the other end of the spring is arranged on the installation ring body, the spring is in a normally-loose state, the nozzle body is connected with the guide pipe in a shaft sleeve mode, at least two stay wire through holes are formed in the inner wall of the nozzle body forming a sleeve, one section of the stay wire is fixed on the installation ring body, the other end of the stay wire is connected with a blocking ring for driving the anti-blocking striking air passage to open and close, and a blocking material impact air passage facing the liquid outlet of the guide pipe is arranged on the blocking ring.
In specific implementation, the steel jet striking hole is an annular hole so as to form a conical air flow with the cone angle smaller than 22 degrees.
In a specific implementation, the atomizing and crushing striking hole group comprises at least 6 columnar jet flow ports, and the distribution of the jet flow ports takes the axis of the honeycomb duct as the center.
In specific implementation, a miniature spray pipe is arranged in the columnar spray port, and a rotary automation space with a rotary cone angle of not less than 60 degrees is arranged at the installation position of the spray pipe, wherein the rotary cone angle takes an installation fulcrum of the miniature spray pipe as a circle center, and is oriented above and downwards.
In the implementation, the top of the jet flow pipe is not higher than the edge of the inner wall of the bottom of the air cavity, the bottom is lower than the lower surface of the nozzle body, and umbrella-shaped connecting rods are further arranged between the jet flow pipes so as to realize synchronous retraction and rotation of each jet flow pipe relative to the distribution center.
The umbrella-shaped connecting rod comprises a sliding ring sleeved on the flow guide pipe, a fixed ring sleeved on each flow spray pipe, and a plurality of connecting rods, wherein two sides of each connecting rod are hinged with the fixed ring and the sliding ring. In the design, the air outlet of the spray pipe is close to tangency with the atomization range, which is equivalent to adding a layer of gas hood to the atomization range, and at each point, the direction of the gas hood is approximately tangential with the flow direction of atomized powder, the spray pipe has a certain image range and a certain rotating vector force, the original umbrella-shaped scattering after atomization is changed into the cylindrical scattering of the hood after atomization, the formed curve has a longer line length, the forming range is more accurate, and the forming effect is better.
Or, the device further comprises an auxiliary hoop, wherein the outer ring of the auxiliary hoop is larger than the inner ring of the mounting ring formed by the atomization breaking beating hole group, and the inner ring of the auxiliary hoop is smaller than the outer ring of the mounting ring formed by the atomization breaking beating hole group.
In a specific implementation, the umbrella-shaped connecting rod further comprises a cone-shaped heat shield which is arranged above the umbrella-shaped connecting rod.
The invention also relates to particle reinforced cobalt-based metal powder, wherein the tightly coupled circular seam nozzle is used in processing and consists of cobalt base metal powder and carbide particles, and the ratio of the cobalt base metal powder to the carbide particles is as follows: 50-98% cobalt base metal powder, 2-50% carbide particles selected from one or more of WC, tiC, siC; wherein the cobalt base metal powder comprises the following chemical components in percentage by mass: 0.1-2.0% of C,20.0-40.0% of Cr,1.0-20.0% of W,1.0-10.0% of Mo, less than or equal to 1.5% of Si, less than or equal to 3.0% of Fe, less than or equal to 3.0% of Ni, less than or equal to 1.0% of Mn, less than or equal to 0.030% of P, less than or equal to 0.030% of S, and the balance of Co and unavoidable impurities.
The sphericity of the powder is more than or equal to 85%, the fluidity is 16-30 s/50g, C is 0.1-1.5%, and Cr is 25-35%.
The fluidity of the powder is 16-30 s/100g, the oxygen content is less than or equal to 100ppm, and the sphericity is more than or equal to 90%.
The invention has the beneficial effects that:
the tightly coupled circular seam nozzle can automatically prevent blockage and has better powder preparation effect;
the whole equipment is free of an external power source and manual work, automatic adjustment and adjustment can still be realized, the adjustment of the application range of the equipment is realized on the premise of not greatly increasing the cost, and the flexibility and the automation degree are greatly improved;
the equipment ensures flexibility, reasonably limits the field area after atomization, is more beneficial to controlling the processing result, effectively prevents uncontrollable splashing of metal atomized particles, and has high adjustable performance, so that the equipment can be adjusted at any time according to the working condition occasion of the field;
the auxiliary tools are arranged, so that the equipment can be flexibly and auxiliary adjusted, the technical capability requirement on workers is low, and the labor cost is saved to a certain extent;
a close-coupled circular seam nozzle for atomizing in combination with a primary air flow, an auxiliary wall surface, and an auxiliary air flow, which is distinguished from multistage atomization, is provided. The problems that the atomization process is unstable or the atomization cannot be continuously kept high-efficiency due to the deflection effect of the airflow during the atomization of the single-beam airflow during the atomization of the loaded metal liquid flow are effectively solved;
the characteristics of the related equipment and the related metal powder are matched, so that the powder discharging of the finished product is facilitated.
Drawings
FIG. 1 is a front view of the structure of the present invention;
FIG. 2 is a bottom view of the structure of the present invention;
FIG. 3 is a left side view of the structure of the present invention;
FIG. 4 is a B-B cross-sectional view of the schematic structure of FIG. 3 in accordance with the present invention;
FIG. 5 is a schematic illustration of the effect of the present invention in an isometric view in full section of the schematic configuration of FIG. 3;
FIG. 6 is a full cross-sectional view of another embodiment of the present invention;
FIG. 7 is an enlarged schematic view of FIG. 4A;
FIG. 8 is a perspective view of the present invention;
the names of the components in the figure are as follows: 1. a flow guiding pipe; 2. a nozzle body; 3. mounting a ring body 4, and an air inlet hole; 5. steel-covered jet striking holes are prevented; 6. a columnar spray port; 7. a blocking ring; 8. blocking material impacts the air passage; 9. a slip ring; 10. a connecting rod; 11. a fixing ring; 12. a cone-shaped heat shield.
Detailed Description
The preferred embodiments of the present invention will be described below with reference to the accompanying drawings, it being understood that the preferred embodiments described herein are for illustration and explanation of the present invention only, and are not intended to limit the present invention.
Example 1
Referring to fig. 1-5, a tight coupling circular seam nozzle is disclosed, a flow guide pipe 1 is designed to be communicated with metal fluid, a nozzle body 2 is sleeved outside the flow guide pipe 1, a hollow air cavity is arranged in the nozzle body 2, the air cavity comprises an air inlet 4 penetrating through the side wall of the nozzle, further comprises a steel-wrapping-preventing jet striking hole 5 and an atomization breaking striking hole group which face the metal flow, further comprises a steel-wrapping-preventing striking hole which can be automatically formed and impacted, and a linkage mechanism is arranged between the steel-wrapping-preventing striking hole and the flow guide pipe 1 so as to form an anti-blocking striking air passage channel when steel wrapping is formed;
the linkage mechanism comprises a spring arranged on the upper surface of the nozzle body 2, a protruding installation ring body 3 is arranged on the flow guide pipe 1, the other end of the spring is arranged on the installation ring body 3, the spring is in a normally-loose state, the nozzle body 2 is connected with the flow guide pipe 1 in a shaft sleeve mode, at least two stay wire through holes are formed in the inner wall of the nozzle body 2 forming a sleeve, one section of stay wire is fixed on the installation ring body 3, the other end of the stay wire is connected and drives a blocking ring 7 for opening and closing an anti-blocking striking air passage, and a blocking impact air passage 8 facing to a liquid outlet of the flow guide pipe 1 is arranged on the blocking ring 7.
During operation, prevent package steel efflux and strike hole 5 and be used for initially preventing package steel, atomizing broken strike hole group is used for further optimizing and prescribing a limit to the scope of atomizing, and the anti-blocking strike air flue of UNICOM's mechanism and drive, when the package steel appears in the export, drive honeycomb duct 1 aversion, and the anti-blocking strike air flue under the in-process normal close state that honeycomb duct 1 was shifted opens, form the gas impact to package steel position, the impact effect is better, the pertinence is better, realization that can be better is prevented blocking up and preventing package steel, further, when package steel is strikeed off, the spring drives to reset, prevent blocking up and strike the air flue and get back to the normally closed state at the time.
In the working process, the air inlet hole 4 is used for delivering high-speed and high-pressure air, the flow guide pipe 1 is used for delivering molten raw material metal flow, the outlet of the steel-covered jet striking hole 5 is prevented from meeting the raw material metal flow, negative pressure is effectively formed, the raw material metal flow is convenient for mist diffusion, the air outlet of the mist-like diffusion striking control group is used for further striking the metal flow of mist-like diffusion of regular books, the atomizing effect is further improved, and the final powdering effect is further optimized.
The steel jet striking hole 5 is an annular hole so as to form a conical air flow with the cone angle smaller than 22 degrees. The design of the angle is determined for the characteristics of most materials in this process step.
The atomizing and crushing striking hole group comprises at least 6 columnar jet orifices 6, and the distribution of the jet orifices takes the axis of the flow guide pipe 1 as the center.
The cylindrical jet flow port 6 is internally provided with a miniature jet flow pipe, and the installation position of the jet flow pipe is provided with a rotary automation space with a rotary cone angle not smaller than 60 degrees, wherein the rotary cone angle takes an installation fulcrum of the miniature jet flow pipe as a circle center, and is oriented upwards and downwards. In the working process, the columnar spray opening 6 can rotate to a proper position aiming at metal liquid flows of different materials before starting, so that the flexibility and pertinence are stronger, and in the working process, the columnar spray opening can be manually adjusted before starting.
The top of the jet pipes is not higher than the edge of the inner wall of the bottom of the air cavity, the bottom of the jet pipes is lower than the lower surface of the nozzle body 2, and umbrella-shaped connecting rods 10 are further arranged between the jet pipes so as to realize synchronous retraction and rotation of the jet pipes relative to the distribution center. The adjustment in one conical surface space is realized so as to adapt to various metal liquid flow raw materials with different proportioning properties.
At present, most researches on close-coupled girth nozzles are limited to researching a spray pipe structure, a spray pipe angle, a spray pipe extending length and the like for controlling the flow of single-phase air flow, but in the actual atomization process of the close-coupled girth nozzles, the air flow cannot be stably and continuously kept in an original designed high-efficiency atomization state for stable atomization process due to the mass load effect of high-temperature metal liquid flow of inclined jet air flow, so that the flow deflection of the air flow occurs, the atomization efficiency is reduced, and the powder particle size is thickened finally. Under the thought, partial area is limited or the whole gas flow is limited by adding external conditions, so that the deflection is kept within a certain pre-designed controllable range when the gas flow at the outlet of the nozzle atomizes and breaks the metal liquid flow. This will effectively maintain a stable and efficient atomisation of the metal stream at the exit of the draft tube. Therefore, a beam of deflection-preventing auxiliary air flow is added at the edge of the high-speed air flow of the nozzle, and meanwhile, the height of the metal inner wall surface of the nozzle at the bottom end of the flow guide pipe is prolonged, so that the metal inner wall surface is in a certain high-speed range at the bottom of the nozzle, and the deflection range of the air flow at the outlet of the nozzle is limited.
The umbrella-shaped connecting rod 10 comprises a sliding ring 9 sleeved on the flow guide pipe 1, a fixed ring 11 sleeved on each flow guide pipe, and a plurality of connecting rods 10, wherein two sides of each connecting rod 10 are hinged with the fixed ring 11 and the sliding ring 9. The design can realize synchronous rotation, is similar to the principle of opening an umbrella, and reduces the labor intensity of workers.
The invention also relates to particle reinforced cobalt-based metal powder, wherein the tightly coupled circular seam nozzle is used in processing and consists of cobalt base metal powder and carbide particles, and the ratio of the cobalt base metal powder to the carbide particles is as follows: 50-98% cobalt base metal powder, 2-50% carbide particles selected from one or more of WC, tiC, siC; wherein the cobalt base metal powder comprises the following chemical components in percentage by mass: 0.1-2.0% of C,20.0-40.0% of Cr,1.0-20.0% of W,1.0-10.0% of Mo, less than or equal to 1.5% of Si, less than or equal to 3.0% of Fe, less than or equal to 3.0% of Ni, less than or equal to 1.0% of Mn, less than or equal to 0.030% of P, less than or equal to 0.030% of S, and the balance of Co and unavoidable impurities.
In the processing process, WC, tiC, siC particles with the granularity range of 10-100 mu m are selected, the prepared metal powder with the granularity range of 0-150 mu m is combined with one or more than two of WC, tiC, siC, and the mixture is uniformly mixed in a mixer according to the corresponding proportion, so that the particle reinforced cobalt-based metal powder can be prepared.
The invention provides a particle reinforced cobalt-based metal powder, which is characterized by comprising cobalt matrix metal powder and carbide particles, wherein the mixture ratio of the cobalt matrix metal powder to the carbide particles is as follows: 50-98% cobalt base metal powder, 2-50% carbide particles, the oxide or carbide particles selected from one or more of WC, tiC, siC; wherein the cobalt base metal powder comprises the following chemical components in percentage by mass: 0.1-2.0% of C,20.0-40.0% of Cr,1.0-20.0% of W,1.0-10.0% of Mo, less than or equal to 1.5% of Si, less than or equal to 3.0% of Fe, less than or equal to 3.0% of Ni, less than or equal to 1.0% of Mn, less than or equal to 0.030% of P, less than or equal to 0.030% of S, and the balance Co and unavoidable impurities;
wherein the sphericity of the powder is more than or equal to 90 percent, and the fluidity is 32-41 s/100g.
Preferably, C is 0.1-1.5%.
Preferably, cr is 25-35%.
Preferably, the oxygen content is less than or equal to 100ppm.
Preferably, there is provided a process for preparing the above powder, characterized in that it comprises: raw material components are alloyed and proportioned, then vacuum smelting is carried out on cobalt ingots, intermediate frequency induction heating is applied to melt the cobalt ingots, and the vacuum degree of a smelting chamber is 10 -1 -10 -2 Pa, pulverizing by adopting an air atomization method, wherein the argon pressure of powder spraying gas is 1.2-3.8MPa, and screening the granularity after the powder is obtained, and screening metal powder with the granularity range of 10-100 mu m; carbide particles with the granularity range of 10-100 mu m are selected, and the prepared metal powder with the granularity range of 10-100 mu m and the carbide particles are uniformly mixed in a mixer according to the corresponding proportion, so that the particle reinforced cobalt-based metal powder can be prepared.
Preferably, there is also provided a cobalt base metal powder comprising the following elements in mass percent: 0.2% of C,0.1% of Si,0.1% of Mn,27% of Cr,6% of Mo,2% of Ni, less than or equal to 0.030% of P, less than or equal to 0.030% of S, 15% of WC particles, and the balance of cobalt and unavoidable impurities.
The particle size of the metal powder is as follows: 10-100 μm, flowability: 16s/50g, sphericity not less than 91% and oxygen content 89ppm.
Preferably, the oxygen content is less than or equal to 100ppm.
The mass fractions of the elements in the target product are shown in example 1 in table 1. The performance parameters of example 1 are shown in table 2. Application example 1 the surface properties of the substrates after ultra-high speed laser cladding repair are shown in table 3.
The mass fractions of each element in the target product in the examples are shown in table 1, the performance parameters are shown in table 2, and the surface properties after 3D printing and ultra-high rate laser cladding processing in the application examples are shown in table 3.
TABLE 1 particle-reinforced cobalt-based metal powder composition (mass fraction,%)
| Examples | C | Si | Mn | P、S | Cr | Mo | W | Ni | Particle/content | Co |
| Example 1 | 0.2 | 0.1 | 0.1 | ≤0.03 | 27 | 6 | - | 2.0 | WC-9 | Bal. |
| Example 2 | 1.2 | 1.0 | 1.0 | ≤0.03 | 31 | 1.0 | 12 | 3.0 | TiC-5，SiC-5 | Bal. |
| Example 3 | 1.2 | 1.5 | 1.0 | ≤0.03 | 29 | 1.5 | 4.5 | 3.0 | WC-5，TiC-4 | Bal. |
TABLE 2 particle-reinforced cobalt-based Metal powder characterization parameters (mass fraction,%)
| Examples | Particle size μm | Fluidity s/50g | Sphericity% | Oxygen content/ppm |
| Example 1 | 10-100 | 16 | 91 | 89 |
| Example 2 | 10-100 | 16 | 94 | 93 |
| Example 3 | 10-100 | 17 | 93 | 91 |
TABLE 3 particle-reinforced cobalt-based metal powder product Properties
| Examples | Hardness HRC | Percent improvement in abrasion resistance% | Percent life extension% |
| Example 1 | 56 | 142 | 220 |
| Example 2 | 52 | 138 | 170 |
| Example 3 | 57 | 144 | 190 |
Example 2
In this embodiment, the working principle is the same as that of embodiment 1, and the working principle is that the device further comprises a plurality of auxiliary devices, and specifically further comprises an auxiliary hoop, wherein the outer ring of the auxiliary hoop is larger than the inner ring of the mounting ring formed by the atomizing and crushing striking hole group, and the inner ring of the auxiliary hoop is smaller than the outer ring of the mounting ring formed by the atomizing and crushing striking hole group. The auxiliary hoop is not shown in the drawings, and has a ring-shaped structure, and can be divided into a lower part of the self-atomizing and crushing striking hole group, an upper part of the lower part of the self-atomizing and crushing striking hole group, an auxiliary angle deflection or a clamping sleeve arranged outside the atomizing and crushing striking hole group, and can move downwards from top to bottom to perform angle adjustment, and the umbrella-shaped connecting rod 10 further comprises a cone-shaped heat shield 12 arranged above the umbrella-shaped connecting rod. The design is heat insulation and protects the umbrella-shaped connecting rod.
The mass fraction of each element is as follows: 1.2% of C,1.0% of Si,1.0% of Mn,31% of Cr,1.0% of Mo,12% of W,3% of Ni, P and S less than or equal to 0.030%,5% of TiC particles, 5% of SiC particles and the balance of cobalt and unavoidable impurities.
The particle size of the metal powder is as follows: 10-100 μm, flowability: 16s/50g, sphericity not less than 94% and oxygen content 93ppm.
The mass fractions of the elements in the target product are shown in example 2 in table 1. The performance parameters of example 2 are shown in table 2. Application example 2 the surface properties of the substrates after ultra-high speed laser cladding repair are shown in table 3.
Example 3
The mass fraction of each element is as follows: 1.2% of C,1.5% of Si,1.0% of Mn,29% of Cr,1.5% of Mo,4.5% of W,3.0% of Ni, P and S are less than or equal to 0.030%,5% of WC particles, 4% of TiC particles and the balance of cobalt and unavoidable impurities.
The particle size of the metal powder is as follows: 10-100 μm, flowability: 17 s/50g, sphericity is more than or equal to 93 percent, and oxygen content is 91ppm.
Cladding and repairing the surface of the matrix by using a semiconductor laser cladding system, and adopting the process parameters: the laser power is 1-2 kw, the light spot diameter is 1mm, the powder feeding speed is 5-8 kg/h, the laser scanning speed is 20-500 m/min, the lap joint rate is 30-40%, the single-layer cladding thickness is 25-500 mu m, the laser cladding head has an argon protection function, and the argon flow is 15-30L/min.
And machining the surface of the repaired matrix by adopting a five-axis numerical control machine tool to obtain the required size and good surface performance.
The mass fractions of the elements in the target product are shown in example 3 in table 1. The performance parameters of example 3 are shown in table 2. Application example 3 the surface properties of the substrates after ultra-high speed laser cladding repair are shown in table 3.
Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present invention, and the present invention is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present invention has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A tight coupling circumferential seam nozzle, characterized by: the metal fluid is communicated in the guide pipe (1), the nozzle body (2) is sleeved outside the guide pipe (1), a hollow air cavity is arranged in the nozzle body (2), the air cavity comprises an air inlet hole (4) penetrating through the side wall of the nozzle, a steel-covered jet-flow-preventing striking hole (5) facing the metal flow, an atomization breaking striking hole group and a steel-covered anti-blocking striking hole capable of being automatically formed and impacted, and a linkage mechanism is arranged between the steel-covered anti-blocking striking hole and the guide pipe (1) so as to form an anti-blocking striking air passage channel when steel-covered is formed;
the linkage mechanism comprises a spring arranged on the upper surface of the nozzle body (2), a protruding installation ring body (3) is arranged on the guide pipe (1), the other end of the spring is arranged on the installation ring body (3), the spring is in a normally-loose state, the nozzle body (2) is connected with the guide pipe (1) in a shaft sleeve mode, at least two stay wire through holes are formed in the inner wall of the nozzle body (2) forming a sleeve, one section of stay wire is fixed on the installation ring body (3), the other end of the stay wire is connected with a blocking ring (7) for driving the anti-blocking striking air passage to open and close, and a blocking material impact air passage (8) facing the liquid outlet of the guide pipe (1) is arranged on the blocking ring (7).
2. The close-coupled circular seam nozzle of claim 1, wherein: the steel-covered jet striking hole (5) is an annular hole so as to form a conical air flow with the cone angle smaller than 22 degrees.
3. The close-coupled circular seam nozzle of claim 1, wherein: the atomization crushing striking hole group comprises at least 6 columnar jet flow ports (6), the distribution of the jet flow ports takes the axis of the guide pipe (1) as the center, a miniature jet flow pipe is arranged in the columnar jet flow ports (6), the installation position of the jet flow pipe is provided with a rotation automation degree space with a rotation cone angle not smaller than 60 degrees, wherein the rotation cone angle takes the installation fulcrum of the miniature jet flow pipe as the center of a circle, and the upper part and the lower part are oriented.
4. A close-coupled circular seam nozzle as in claim 3, wherein: the top of the jet pipe is not higher than the edge of the inner wall of the bottom of the air cavity, the bottom is lower than the lower surface of the nozzle body (2), umbrella-shaped connecting rods (10) are further arranged between the jet pipes to realize synchronous winding and unwinding rotation of the jet pipes relative to the distribution center, the umbrella-shaped connecting rods (10) comprise sliding rings (9) sleeved on the guide pipe (1) and fixed rings (11) sleeved on the jet pipes, the jet pipe further comprise a plurality of connecting rods (10), and two sides of each connecting rod (10) are hinged to the fixed rings (11) and the sliding rings (9).
5. The close-coupled circular seam nozzle of claim 4, wherein: the device further comprises an auxiliary hoop, wherein the outer ring of the auxiliary hoop is larger than the inner ring of the mounting ring formed by the atomization breaking beating hole group, and the inner ring of the auxiliary hoop is smaller than the outer ring of the mounting ring formed by the atomization breaking beating hole group.
6. The close-coupled circular seam nozzle of claim 5, wherein: the umbrella-shaped connecting rod (10) also comprises a cone-shaped heat shield (12) which is arranged above the umbrella-shaped connecting rod.
7. A particle-reinforced cobalt-based metal powder, processed using the close-coupled girth spray nozzle of claim, wherein: the cobalt base metal powder consists of cobalt base metal powder and carbide particles, and the proportion is as follows: 50-98% cobalt base metal powder, 2-50% carbide particles selected from one or more of WC, tiC, siC; wherein the cobalt base metal powder comprises the following chemical components in percentage by mass: 0.1-2.0% of C,20.0-40.0% of Cr,1.0-20.0% of W,1.0-10.0% of Mo, less than or equal to 1.5% of Si, less than or equal to 3.0% of Fe, less than or equal to 3.0% of Ni, less than or equal to 1.0% of Mn, less than or equal to 0.030% of P, less than or equal to 0.030% of S, and the balance of Co and unavoidable impurities.
8. The particle-reinforced cobalt-based metal powder of claim 7, wherein: the sphericity of the powder is more than or equal to 85%, the fluidity is 16-30 s/50g, C is 0.1-1.5%, and Cr is 25-35%.
9. The particle-reinforced cobalt-based metal powder of claim 7, wherein: the fluidity of the powder is 16-30 s/100g, the oxygen content is less than or equal to 100ppm, and the sphericity is more than or equal to 90%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211361822.3A CN116117147A (en) | 2022-11-02 | 2022-11-02 | Tightly coupled circular seam nozzle and processed particle reinforced cobalt-based metal powder thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211361822.3A CN116117147A (en) | 2022-11-02 | 2022-11-02 | Tightly coupled circular seam nozzle and processed particle reinforced cobalt-based metal powder thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116117147A true CN116117147A (en) | 2023-05-16 |
Family
ID=86306947
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211361822.3A Pending CN116117147A (en) | 2022-11-02 | 2022-11-02 | Tightly coupled circular seam nozzle and processed particle reinforced cobalt-based metal powder thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116117147A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116604023A (en) * | 2023-05-29 | 2023-08-18 | 中航迈特增材科技(北京)有限公司 | Atomizer and preparation method of silver powder for 3D printing |
-
2022
- 2022-11-02 CN CN202211361822.3A patent/CN116117147A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116604023A (en) * | 2023-05-29 | 2023-08-18 | 中航迈特增材科技(北京)有限公司 | Atomizer and preparation method of silver powder for 3D printing |
| CN116604023B (en) * | 2023-05-29 | 2023-11-21 | 中航迈特增材科技(北京)有限公司 | Atomizer and preparation method of silver powder for 3D printing |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108941588B (en) | Preparation method of nickel-based superalloy powder for laser forming | |
| CN108103499B (en) | A kind of particle enhancing iron-based metal powder for ultrahigh speed laser melting coating | |
| CN104250801B (en) | A kind of hot rolled seamless steel tube conveying roller laser cladding wear, the technique of heat-resisting alloy coating | |
| CN108115145A (en) | A kind of apparatus for preparing metal powder and preparation method | |
| CN106735273A (en) | A kind of precinct laser fusion shaping Inconel718 Co-based alloy powders and preparation method thereof | |
| CN102250584A (en) | Equipment for preparing atomized quick-setting magnetic abrasive | |
| JPH07258819A (en) | Powder for thermal spray and production of carbide coating | |
| CN108130530A (en) | A kind of particle for ultrahigh speed laser melting coating enhances powder metal composition | |
| KR102057014B1 (en) | Conical ribbon mixing and drying device comprising tungsten carbide thermal sprayed- layer | |
| CN106660060B (en) | Thermal spraying component and its application method | |
| CN116117147A (en) | Tightly coupled circular seam nozzle and processed particle reinforced cobalt-based metal powder thereof | |
| CN105665727A (en) | Free-falling double-stage powder mixing gas atomizing water-cooling fast-setting magnetic abrasive preparing method | |
| CN202175648U (en) | Equipment for preparing aerosolized quickly-coagulated magnetic grinding material | |
| CN110055484A (en) | A kind of supersonic speed laser deposition spray gun, laser deposition device and laser deposition method | |
| CN108480652A (en) | It is a kind of to prepare spherical metal powder high efficiency annular distance gas atomizing nozzle | |
| US7628838B2 (en) | Method for producing particle-shaped material | |
| CN114054764B (en) | Spray pipe atomizer for gas atomization powder preparation | |
| CN107052354B (en) | A kind of device and method preparing high sphericity 3D printing refractory metal powder | |
| CN104858439A (en) | Spiral flow type titanium and titanium alloy melt superfine atomizing nozzle | |
| CN106735272A (en) | The aerosolization preparation method of metal dust | |
| CN218591817U (en) | Tightly coupled circular seam nozzle for metal powder making | |
| US5993509A (en) | Atomizing apparatus and process | |
| WO2022213590A1 (en) | Fecral alloy powder, preparation method therefor, blank ingot, and electric heating element | |
| CN110508826A (en) | A kind of efficient electric arc atomising device and a kind of method for preparing ultra-fine grain diameter metal alloy powders | |
| CN109234729A (en) | A kind of laser cladding powder |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |