CN114653955A - Gas atomization powder making method and gas atomization powder making system using same - Google Patents
Gas atomization powder making method and gas atomization powder making system using same Download PDFInfo
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- CN114653955A CN114653955A CN202210130760.9A CN202210130760A CN114653955A CN 114653955 A CN114653955 A CN 114653955A CN 202210130760 A CN202210130760 A CN 202210130760A CN 114653955 A CN114653955 A CN 114653955A
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- 239000000843 powder Substances 0.000 title claims abstract description 36
- 238000009689 gas atomisation Methods 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims description 8
- 239000000956 alloy Substances 0.000 claims abstract description 80
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 80
- 239000007788 liquid Substances 0.000 claims abstract description 72
- 238000000889 atomisation Methods 0.000 claims abstract description 20
- 239000002184 metal Substances 0.000 claims abstract description 18
- 239000002994 raw material Substances 0.000 claims abstract description 17
- 238000002360 preparation method Methods 0.000 claims abstract description 13
- 238000004519 manufacturing process Methods 0.000 claims description 12
- 238000003723 Smelting Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 238000007689 inspection Methods 0.000 claims description 6
- 238000005070 sampling Methods 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 238000010298 pulverizing process Methods 0.000 claims 3
- 230000000694 effects Effects 0.000 abstract description 5
- 239000007789 gas Substances 0.000 description 8
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 5
- 235000017491 Bambusa tulda Nutrition 0.000 description 5
- 241001330002 Bambuseae Species 0.000 description 5
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 5
- 239000011425 bamboo Substances 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009690 centrifugal atomisation Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000007712 rapid solidification Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000009692 water atomization Methods 0.000 description 1
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
Landscapes
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
Abstract
The invention relates to the technical field of gas atomization powder preparation, in particular to a gas atomization powder preparation method and a gas atomization powder preparation system using the same. The metal raw materials are added into an electric furnace to be smelted into alloy liquid, the smelted alloy liquid is conveyed into a tundish by a conveying auger, the alloy liquid flows out from a leakage hole at the bottom of the tundish and enters a nozzle, the nozzle extends into an atomizing cylinder of an atomizing mechanism, an airflow pipeline on the atomizing mechanism extends into the atomizing cylinder and faces an outlet at the bottom of the nozzle, a temperature control bin and a temperature control device are arranged between the airflow pipeline and an air pump on the atomizing mechanism, airflow conveyed by the air pump on the atomizing mechanism firstly passes through the temperature control bin to heat the airflow to 15 ℃, and the airflow reaching the temperature standard enters the atomizing cylinder to atomize the alloy liquid. The invention can keep the gas temperature at a stable value, so that the atomization effect of the alloy liquid is better; the heat exchange medium in the fan cover can recycle the heat emitted by the alloy liquid.
Description
Technical Field
The invention relates to the technical field of gas atomization powder preparation, in particular to a gas atomization powder preparation method and a gas atomization powder preparation system using the same.
Background
Atomization powdering is a powder preparation process in which a rapidly moving fluid (atomizing medium) impacts or otherwise breaks up a metal or alloy liquid into fine droplets, which are subsequently condensed into a solid powder.
Atomization is the best method for producing fully alloyed powders, the product of which is known as pre-alloyed powder. Each particle of this powder not only has exactly the same uniform chemical composition as a given molten alloy, but also refines the crystalline structure due to rapid solidification; eliminating macro-segregation of the second phase. The atomization powder-making method is divided into two major categories, the "two-stream method" (crushing the alloy stream with an atomizing medium stream) and the "one-stream method" (crushing the alloy stream in other ways). 846 the former atomizing medium is divided into gas (helium, , nitrogen, air) and liquid (water, oil); the latter is e.g. centrifugal atomization and dissolved air vacuum atomization.
The most widely used are the gas atomization and the water atomization. When atomizing to prepare powder, firstly, an electric furnace or an induction furnace is used for smelting metal raw materials into alloy liquid with qualified components (generally overheated by 100-150 ℃), and then the alloy liquid is injected into a tundish above an atomizing nozzle. The alloy liquid flows out from a leak hole at the bottom of the tundish, meets high-speed airflow or water flow when passing through the nozzle and is atomized into fine droplets, and the atomized droplets are rapidly solidified into alloy powder in the closed atomizing cylinder.
For gas atomization powder making, the temperature of gas can directly influence the atomization effect of the alloy liquid, the temperature of gas sprayed by a general gas atomization powder making system is not effectively controlled, the temperature of the gas changes along with the room temperature, and the atomization effect of the alloy liquid is not stable enough.
Disclosure of Invention
The invention aims to provide a gas atomization powder preparation method and a gas atomization powder preparation system using the same, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a gas atomization powder making system for gas atomization powder making comprises an electric furnace, a conveying auger, a tundish, a nozzle, an atomization mechanism, a temperature control bin and a temperature control device, wherein metal raw materials are added into the electric furnace to be melted into alloy liquid, the melted alloy liquid is conveyed into the tundish by the conveying auger, the conveying auger is sleeved with a fan cover, heat dissipated by the alloy liquid conveyed inside the conveying auger is recovered by heat exchange media flowing in the fan cover, the alloy liquid flows out of a hole at the bottom of the tundish and enters the nozzle, then the alloy liquid flows out of the nozzle, the nozzle extends into an atomization barrel of the atomization mechanism, an airflow pipeline on the atomization mechanism extends into the atomization barrel and faces an outlet at the bottom of the nozzle, high-speed airflow accurately contacts the flowing alloy liquid to be atomized, the temperature control bin and the temperature control device are arranged between the airflow pipeline and an air pump on the atomization mechanism, the temperature control device adjusts the temperature in the temperature control bin to 15 ℃, the air flow delivered by the air pump on the atomizing mechanism firstly passes through the temperature control bin to heat the air flow to 15 ℃, and the air flow reaching the temperature standard enters the atomizing barrel to atomize the alloy liquid.
As a further scheme of the invention, the alloy liquid melted in the electric furnace is sampled and inspected, and the alloy liquid is produced after the inspected alloy liquid component meets the production standard.
As a further scheme of the invention, the atomization mechanism consists of an air pump, an airflow pipeline and an atomization cylinder, wherein the airflow pipeline extends into the atomization cylinder, and the joint of the airflow pipeline and the atomization cylinder is sealed.
As a further aspect of the present invention, a temperature sensor provided in the temperature control device extends into the temperature control chamber, a temperature control module provided in the temperature control device is electrically connected to the temperature sensor, a temperature adjustment mechanism provided in the temperature control device adjusts the temperature in the temperature control chamber, a button embedded in the temperature control device sets a temperature value, and the temperature in the temperature control chamber is displayed through a display screen embedded in the temperature control device.
A gas atomization powder preparation method comprises the following steps:
s1, selecting a metal raw material, and removing the oxide on the surface of the metal raw material;
s2, putting the processed metal raw material into an electric furnace, heating the electric furnace to 150 ℃, and smelting the metal raw material into alloy liquid;
s2.1, sampling alloy liquid for inspection, and putting the alloy liquid into production after the alloy liquid meets the production standard after the inspection;
s3, discharging the smelted alloy liquid from the electric furnace, conveying the alloy liquid into a tundish by a conveying auger, and enabling the alloy liquid to flow out of a leakage hole at the bottom of the tundish and enter a nozzle;
s4, setting a temperature value by a button embedded in a temperature control device, adjusting the temperature in a temperature control bin to 15 ℃ by a temperature adjusting mechanism configured in the temperature control device, heating the air flow to 15 ℃ by the air flow conveyed by an air pump on an atomizing mechanism through the temperature control bin, spraying the air flow into an atomizing cylinder of the atomizing mechanism by an air flow pipeline on the air flow atomizing mechanism reaching the temperature standard, contacting the high-speed air flow with the alloy liquid flowing from a nozzle to atomize the alloy liquid into fine droplets, and quickly solidifying the atomized droplets into alloy powder in a closed atomizing cylinder.
Compared with the prior art, the invention has the beneficial effects that: a temperature control bin and a temperature control device are arranged between an airflow pipeline on the atomizing mechanism and an air pump on the atomizing mechanism, the temperature in the temperature control bin is adjusted to 15 ℃ by a temperature adjusting mechanism configured by the temperature control device, airflow conveyed by the air pump on the atomizing mechanism is heated to 15 ℃ through the temperature control bin, and the airflow pipeline on the airflow atomizing mechanism reaching the temperature standard is sprayed into an atomizing cylinder of the atomizing mechanism. The gas temperature sprayed by the gas atomization powder preparation system is effectively controlled, so that the gas temperature is kept at a stable value, and the atomization effect of the alloy liquid is better.
The conveying auger is sleeved with a fan cover, heat exchange media flow through the fan cover to recover heat emitted by alloy liquid conveyed inside the conveying auger, the heat exchange media enter from one side of the bottom of the wind sleeve, the heat exchange media subjected to heat exchange are discharged from the other side of the top of the wind sleeve, and the heat exchange media recover and recycle the heat emitted by the alloy liquid in the fan cover.
Detailed Description
The technical solutions in the present invention will be described clearly and completely with reference to the following embodiments of the present invention, and it should be understood 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.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown herein, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1
The embodiment provided by the invention comprises the following steps: a gas atomization powder manufacturing system for gas atomization powder manufacturing comprises an electric furnace, a conveying auger, a tundish, a nozzle, an atomization mechanism, a temperature control bin and a temperature control device, wherein a smelting system is composed of the electric furnace, metal raw materials are added into the electric furnace to be smelted into alloy liquid, the alloy liquid smelted in the electric furnace is sampled and inspected, and the tested alloy liquid components meet production standards and then are produced.
The conveying system is composed of a conveying auger, a tundish and a nozzle, the melted alloy liquid is conveyed into the tundish by the conveying auger, the conveying auger is sleeved with a fan cover, heat exchange medium flows through the fan cover to recover heat emitted by the alloy liquid conveyed inside the conveying auger, the heat exchange medium enters from one side of the bottom of the fan cover, the heat exchange medium after heat exchange is discharged from the other side of the top of the fan cover, and the heat emitted by the alloy liquid is recovered and reused in the fan cover by the heat exchange medium. The alloy liquid flows out from the leakage hole at the bottom of the tundish into the nozzle, and then the alloy liquid flows out from the nozzle.
The atomizing system is by atomizing mechanism, control by temperature change storehouse and temperature control device constitute, atomizing mechanism is by the air pump, airflow pipeline and an atomizing section of thick bamboo are constituteed, airflow pipeline stretches into in the atomizing section of thick bamboo, airflow pipeline and atomizing section of thick bamboo junction are sealed, the nozzle stretches into in the atomizing section of thick bamboo of atomizing mechanism, airflow pipeline on the atomizing mechanism stretches into in the atomizing section of thick bamboo and faces nozzle bottom export, the accurate contact outflow of high velocity air alloy liquid atomizes, set up control by temperature change storehouse and temperature control device between airflow pipeline and the air pump on the atomizing mechanism, the temperature sensor that temperature control device set up stretches into in the control by temperature change storehouse, the built-in temperature control module of temperature control device is connected with temperature sensor electricity, the temperature in the temperature control storehouse is adjusted to the temperature adjustment mechanism of temperature control device configuration, the button setting temperature value of temperature control device embedding, and the temperature in the control storehouse is shown through the display screen that imbeds on the temperature control device. The temperature control device adjusts the temperature in the temperature control bin to 15 ℃, the air flow conveyed by the air pump on the atomizing mechanism firstly passes through the temperature control bin to heat the air flow to 15 ℃, the air flow reaching the temperature standard enters the atomizing barrel to atomize the alloy liquid, and the temperature of the gas sprayed by the gas atomizing powder making system is effectively controlled, so that the temperature of the gas is kept at a stable value, and the atomizing effect of the alloy liquid is better.
Example 2
The embodiment provided by the invention comprises the following steps: a gas atomization powder preparation method comprises the following steps:
s1, selecting a metal raw material, and removing the oxide on the surface of the metal raw material;
s2, putting the processed metal raw material into an electric furnace, heating the electric furnace to 150 ℃, and smelting the metal raw material into alloy liquid;
s2.1, sampling alloy liquid for inspection, and putting the alloy liquid into production after the alloy liquid meets the production standard after the inspection;
s3, discharging the smelted alloy liquid from the electric furnace, conveying the alloy liquid into a tundish by a conveying auger, and enabling the alloy liquid to flow out of a leakage hole at the bottom of the tundish and enter a nozzle;
s4, setting a temperature value by a button embedded in a temperature control device, adjusting the temperature in a temperature control bin to 15 ℃ by a temperature adjusting mechanism configured in the temperature control device, heating the air flow to 15 ℃ by the air flow conveyed by an air pump on an atomizing mechanism through the temperature control bin, spraying the air flow into an atomizing cylinder of the atomizing mechanism by an air flow pipeline on the air flow atomizing mechanism reaching the temperature standard, contacting the high-speed air flow with the alloy liquid flowing from a nozzle to atomize the alloy liquid into fine droplets, and quickly solidifying the atomized droplets into alloy powder in a closed atomizing cylinder.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference signs in the claims shall not be construed as limiting the claim concerned.
Claims (5)
1. The utility model provides a gas atomization powder process system of gas atomization powder process, includes electric stove, carries auger, middle package, nozzle, atomizing mechanism, control by temperature change storehouse and temperature control device, its characterized in that: the smelting system consists of an electric furnace, and metal raw materials are added into the electric furnace to be smelted into alloy liquid;
the conveying system consists of a conveying auger, a tundish and a nozzle, the melted alloy liquid is conveyed into the tundish by the conveying auger, the conveying auger is sleeved with a fan cover, heat dissipated by the alloy liquid conveyed inside the conveying auger is recovered by flowing heat exchange medium in the fan cover, the alloy liquid flows out from a leakage hole at the bottom of the tundish and enters the nozzle, and then the alloy liquid flows out from the nozzle;
the atomizing system comprises an atomizing mechanism, a temperature control bin and a temperature control device, a nozzle extends into an atomizing barrel of the atomizing mechanism, an airflow pipeline on the atomizing mechanism extends into the atomizing barrel and faces an outlet at the bottom of the nozzle, high-speed airflow accurately contacts outflow alloy liquid for atomization, the temperature control bin and the temperature control device are arranged between the airflow pipeline and an air pump on the atomizing mechanism, the temperature in the temperature control bin is adjusted to 15 ℃ by the temperature control device, airflow conveyed by the air pump on the atomizing mechanism firstly passes through the temperature control bin to heat the airflow to 15 ℃, and the airflow reaching the temperature standard enters the atomizing barrel to atomize the alloy liquid.
2. The gas atomization pulverizing system of claim 1, wherein: and sampling and inspecting the molten alloy in the electric furnace, and producing the alloy after the detected alloy liquid components meet the production standard.
3. The gas atomization pulverizing system of claim 1, wherein: the atomizing mechanism consists of an air pump, an air flow pipeline and an atomizing cylinder, the air flow pipeline extends into the atomizing cylinder, and the joint of the air flow pipeline and the atomizing cylinder is sealed.
4. The gas atomization pulverizing system of claim 1, wherein: the temperature control device is characterized in that a temperature sensor arranged on the temperature control device extends into the temperature control bin, a temperature control module arranged in the temperature control device is electrically connected with the temperature sensor, a temperature adjusting mechanism arranged on the temperature control device adjusts the temperature in the temperature control bin, a button embedded in the temperature control device sets a temperature value, and the temperature in the temperature control bin is displayed through a display screen embedded in the temperature control device.
5. A method for preparing powder by gas atomization is characterized in that: gas atomization powder preparation process:
s1, selecting a metal raw material, and removing the oxide on the surface of the metal raw material;
s2, putting the processed metal raw material into an electric furnace, heating the electric furnace to 150 ℃, and smelting the metal raw material into alloy liquid;
s2.1, sampling alloy liquid for inspection, and putting the alloy liquid into production after the alloy liquid meets the production standard after the inspection;
s3, discharging the smelted alloy liquid from the electric furnace, conveying the alloy liquid into a tundish by a conveying auger, and enabling the alloy liquid to flow out of a leakage hole at the bottom of the tundish and enter a nozzle;
s4, setting a temperature value by a button embedded in a temperature control device, adjusting the temperature in a temperature control bin to 15 ℃ by a temperature adjusting mechanism configured in the temperature control device, heating the air flow to 15 ℃ by the air flow conveyed by an air pump on an atomizing mechanism through the temperature control bin, spraying the air flow into an atomizing cylinder of the atomizing mechanism by an air flow pipeline on the air flow atomizing mechanism reaching the temperature standard, contacting the high-speed air flow with the alloy liquid flowing from a nozzle to atomize the alloy liquid into fine droplets, and quickly solidifying the atomized droplets into alloy powder in a closed atomizing cylinder.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210130760.9A CN114653955A (en) | 2022-02-12 | 2022-02-12 | Gas atomization powder making method and gas atomization powder making system using same |
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