阅读说明：本技术 一种自适应坩埚 (Self-adaptive crucible ) 是由 许荣玉 张柯 蒋保林 叶国晨 唐跃跃 魏放 王玄玄 赵银忠 于 2020-11-17 设计创作，主要内容包括：本发明公开了一种自适应坩埚,包括石墨内锅、石墨内锅外壁、自适应层、镁砂外锅；其中石墨内锅位于最内层,用于与金属熔液直接接触；石墨内锅外壁固定在石墨内锅的外侧,石墨内锅外壁的为蜂窝状；所述蜂窝孔内填充填充料,所述填充料包括金属粉、镁砂粉和石墨粉；所述填充料填充蜂窝孔轴向的1/2-2/3；所述镁砂外锅由镁砂和水玻璃烧结制成,位于石墨内锅外壁外侧；所述镁砂外锅填充蜂窝孔剩余的空间；所述镁砂外锅从蜂窝孔外立面至镁砂外锅的外壁之间的厚度为5-15mm。该坩埚能够有效避免金属液泄露,避免设备损坏。(The invention discloses a self-adaptive crucible, which comprises a graphite inner pot, a graphite inner pot outer wall, a self-adaptive layer and a magnesia outer pot, wherein the graphite inner pot is arranged on the outer wall of the graphite inner pot; wherein the graphite inner pot is positioned at the innermost layer and is used for directly contacting with molten metal; the outer wall of the graphite inner pot is fixed at the outer side of the graphite inner pot, and the outer wall of the graphite inner pot is honeycomb-shaped; filling filler in the honeycomb holes, wherein the filler comprises metal powder, magnesia powder and graphite powder; the filling material is filled in 1/2-2/3 in the axial direction of the honeycomb holes; the magnesia outer pot is made by sintering magnesia and water glass and is positioned outside the outer wall of the graphite inner pot; the magnesia outer pot fills the remaining space of the honeycomb holes; the thickness of the magnesia outer pot from the outer vertical surface of the honeycomb holes to the outer wall of the magnesia outer pot is 5-15 mm. The crucible can effectively avoid metal liquid leakage and avoid equipment damage.)

1. A self-adaptive crucible is characterized by comprising a graphite inner pot, a graphite inner pot outer wall, a self-adaptive layer and a magnesia outer pot;

wherein the graphite inner pot is positioned at the innermost layer and is used for directly contacting with molten metal;

the outer wall of the graphite inner pot is fixed at the outer side of the graphite inner pot, and the outer wall of the graphite inner pot is honeycomb-shaped;

filling filler in the honeycomb holes, wherein the filler comprises metal powder, magnesia powder and graphite powder; the filler is calculated according to the volume ratio, 30-60 parts of metal powder, 35-45 parts of magnesia powder and 5-10 parts of graphite powder; the melting point of the metal powder is 800-1200 ℃;

the filling material is filled in 1/2-2/3 in the axial direction of the honeycomb holes;

the magnesia outer pot is made by sintering magnesia and water glass and is positioned outside the outer wall of the graphite inner pot;

the magnesia outer pot fills the remaining space of the honeycomb holes;

the thickness of the magnesia outer pot from the outer vertical surface of the honeycomb holes to the outer wall of the magnesia outer pot is 5-15 mm.

2. The adaptive crucible of claim 1, wherein the axis of each honeycomb cell is inclined toward the bottom side of the crucible, and the smaller angle of the angle between the axis of the honeycomb cell and the horizontal plane is in the range of 10 to 25 degrees.

3. The adaptive crucible of claim 1, wherein the largest inner diameter of the honeycomb holes is 10mm, the smallest inner diameter is 3mm, and the honeycomb holes are directly formed in one piece by the graphite crucible.

4. An adaptive crucible according to claim 3, wherein the wall thickness of the honeycomb cells is in the range of 2-5 mm.

5. The adaptive crucible of claim 1, wherein the metal is a single metal or a combination of metals.

6. The adaptive crucible of claim 5, wherein the single metal is copper.

7. The adaptive crucible as recited in claim 5, wherein the plurality of metals is a combination of copper, iron, and aluminum, and is comprised of, by volume, 15-25 parts aluminum to 50-70 parts copper and 15-20 parts iron.

8. The adaptive crucible of claim 1, wherein the magnesite powder has a particle size of between 0.075-0.1 mm; the particle size of the graphite powder is 0.075-0.1 mm; the filler is prepared by adding magnesia powder and graphite powder into molten metal and fully stirring, and is directly poured into the honeycomb holes.

9. The adaptive crucible of claim 1, wherein the magnesia of the outer pot of magnesia has a particle size in the range of 1 to 3 mm.

10. The adaptive crucible of claim 9, wherein the magnesia outer pot is made by sintering a mixture of magnesia, water glass and graphite fibers; after filling the honeycomb holes with the filler, the mixed magnesia and water glass or the magnesia, water glass and graphite fiber are mixed and coated on the outer wall of the graphite inner pot, and then the mixture is sintered to obtain the graphite inner pot.

Technical Field

The invention relates to a crucible for molten metal used in the production of metal powder by gas atomization.

Background

The existing crucible for producing the gas atomized metal powder needs to be maintained after being used for multiple times, but the maintenance frequency is empirical data, and the risk of metal leakage also exists in the production process, but the leakage of the crucible is difficult to find, so that the possibility that the crack is gradually developed when the crucible has the crack to cause the large leakage of the metal melt. Risk of damage to the device.

Disclosure of Invention

The embodiment of the application provides an aerial fog production self-adaptation crucible, has solved among the prior art in the production process crucible and has taken place the problem of revealing, has realized avoiding leading to the risk that molten metal reveals because of the crucible crack.

The embodiment of the application provides a self-adaptive crucible, which comprises a graphite inner pot, a graphite inner pot outer wall, a self-adaptive layer and a magnesia outer pot;

wherein the graphite inner pot is positioned at the innermost layer and is used for directly contacting with molten metal;

the outer wall of the graphite inner pot is fixed at the outer side of the graphite inner pot, and the outer wall of the graphite inner pot is honeycomb-shaped;

filling filler in the honeycomb holes, wherein the filler comprises metal powder, magnesia powder and graphite powder; the filler is calculated according to the volume ratio, 30-60 parts of metal powder, 35-45 parts of magnesia powder and 5-10 parts of graphite powder; the melting point of the metal powder is 800-1200 ℃;

the filling material is filled in 1/2-2/3 in the axial direction of the honeycomb holes;

the magnesia outer pot is made by sintering magnesia and water glass and is positioned outside the outer wall of the graphite inner pot;

the magnesia outer pot fills the remaining space of the honeycomb holes;

the thickness of the magnesia outer pot from the outer vertical surface of the honeycomb holes to the outer wall of the magnesia outer pot is 5-15 mm.

Further, the axes of each honeycomb hole are inclined towards the bottom side of the crucible, and the angle of the smaller angle in the included angle between the axes of the honeycomb holes and the horizontal plane ranges from 10 degrees to 25 degrees.

Furthermore, the maximum inner diameter of the honeycomb holes is 10mm, the minimum inner diameter is 3mm, and the honeycomb holes are directly formed in an integrated mode by a graphite crucible.

Further, the wall thickness of the honeycomb holes is in the range of 2-5 mm.

Preferably, the metal is a single metal or a combination of metals.

Preferably, the single metal is copper.

Preferably, the plurality of metals are a combination of copper, iron and aluminum, and the combination is composed of 15-25 parts of aluminum, 50-70 parts of copper and 15-20 parts of iron according to a volume ratio.

Preferably, the particle size of the magnesite powder is between 0.075 and 0.1 mm; the particle size of the graphite powder is 0.075-0.1 mm; the filler is prepared by adding magnesia powder and graphite powder into molten metal and fully stirring, and is directly poured into honeycomb holes;

preferably, the particle size of the magnesia outer pot is within the range of 1-3 mm.

Preferably, the magnesia outer pot is made by mixing and sintering magnesia, water glass and graphite fiber; after filling the honeycomb holes with the filler, the mixed magnesia and water glass or the magnesia, water glass and graphite fiber are mixed and coated on the outer wall of the graphite inner pot, and then the mixture is sintered to obtain the graphite inner pot.

One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages: an inner pot made of graphite and an outer pot made of magnesia through sintering form a double-layer structure, and a self-adaptive layer is arranged between the double-layer structure. The adaptive layer is sintered into blocks by using powdered silt and metal. When the outer layer of the crucible has cracks, the self-adaptive layer is melted and permeates into the cracks, and the temperature is reduced when the self-adaptive layer flows to the outer surface, so that the cracks are condensed and filled, and the continuous development of the cracks of the crucible is avoided, and the molten metal is prevented from leaking. Meanwhile, by using the nonferrous metal, the surface of the crucible can be inspected after the production is finished, and the position of the crack can be easily developed.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural diagram of an outer wall of a graphite inner pot;

FIG. 3 is a schematic diagram of a crack adaptive filling structure.

In the figure, a graphite inner pot 10, a graphite inner pot outer wall 20, a self-adaptive layer 30 and a magnesia outer pot 40

Detailed Description

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

An inner pot made of graphite and an outer pot made of magnesia through sintering form a double-layer structure, and a self-adaptive layer is arranged between the double-layer structure. The adaptive layer is sintered into blocks by using powdered silt and metal. When the outer layer of the crucible has cracks, the self-adaptive layer is melted and permeates into the cracks, and the temperature is reduced when the self-adaptive layer flows to the outer surface, so that the cracks are condensed and filled, and the continuous development of the cracks of the crucible is avoided, and the molten metal is prevented from leaking. Meanwhile, by using the nonferrous metal, the surface of the crucible can be inspected after the production is finished, and the position of the crack can be easily developed.

Example one

A self-adaptive crucible comprises a graphite inner pot 10, a graphite inner pot outer wall 20, a self-adaptive layer 30 and a magnesia outer pot 40. The graphite inner pot 10 is positioned on the innermost layer and is used for being in direct contact with molten metal, the outer wall of the graphite inner pot is fixed on the outer side of the graphite inner pot 10, the outer wall 20 of the graphite inner pot is honeycomb-shaped, the axis of each honeycomb hole inclines towards the bottom side of the crucible, and the angle range of the smaller angle in the included angle between the axis of each honeycomb hole and the horizontal plane is 10-25 degrees;

the maximum inner diameter of the honeycomb holes is 10mm, the minimum inner diameter is 3mm, the honeycomb holes can be formed by directly and integrally molding a graphite crucible, and can also be formed by independently using materials and methods for preparing the graphite crucible by using graphite, silicon carbide, silica, refractory clay, asphalt, tar and the like; the wall thickness of the honeycomb holes is within the range of 2-5 mm;

filling filler in the honeycomb holes, wherein the filler comprises metal powder, magnesia powder and graphite powder; the filler is calculated according to the volume ratio, 30-60 parts of metal powder, 35-45 parts of magnesia powder and 5-10 parts of graphite powder; the melting point of the metal powder is 800-1200 ℃, and the metal powder can be a single metal such as copper (convenient to observe after condensation) or a combination of multiple metals such as copper, iron and aluminum, for example, the metal powder consists of 15-25 parts of aluminum, 50-70 parts of copper and 15-20 parts of iron by volume ratio; the particle size of the magnesia powder is between 0.075 and 0.1 mm; the particle size of the graphite powder is 0.075-0.1 mm; the filler is prepared by adding magnesia powder and graphite powder into molten metal and fully stirring, and is directly poured into honeycomb holes;

the filling material is filled in 1/2-2/3 in the axial direction of the honeycomb holes;

the magnesia outer pot 40 is made by sintering magnesia and water glass and is positioned outside the graphite inner pot outer wall 20;

the magnesia outer pot 40 fills the remaining space of the honeycomb holes; the particle size of the magnesia is within the range of 1-3 mm; of course, the magnesia outer pot 40 is preferably made by mixing and sintering magnesia, water glass and graphite fiber at the same time; after filling the honeycomb holes with the filler, mixing the mixed magnesia and water glass or the magnesia, water glass and graphite fibers, coating the mixture on the outer wall 20 of the graphite inner pot, and sintering the mixture to obtain the graphite inner pot;

the thickness of the magnesia outer pot 40 from the outer vertical surface of the honeycomb holes to the outer wall of the magnesia outer pot 40 is 5-15 mm.

The temperature difference between the inside and the outside of the crucible is large because of the temperature difference between the inside and the outside of the crucible and the cold air flow on the outer wall, so that cracks are easy to appear. When the tiny cracks develop inwards, the filler metal in the honeycomb holes drives the magnesia powder and the graphite powder to flow outwards from the inner ends of the cracks under the molten state, and the magnesia powder and the graphite powder are condensed when contacting cold airflow, so that the cracks are prevented from developing inwards continuously, the cold airflow is also prevented from contacting the graphite inner pot on the inner layer, and the crucible perforation is avoided. In addition, when utilizing non ferrous metals such as copper, the crucible is used up, can be convenient when taking out after the cooling see the cracked position of the outer layer of crucible, can remind the staff to repair or change the crucible.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.