WO2021240696A1 - Moule de coulée continue et procédé de fabrication d'un moule de coulée continue - Google Patents

Moule de coulée continue et procédé de fabrication d'un moule de coulée continue Download PDF

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Publication number
WO2021240696A1
WO2021240696A1 PCT/JP2020/020977 JP2020020977W WO2021240696A1 WO 2021240696 A1 WO2021240696 A1 WO 2021240696A1 JP 2020020977 W JP2020020977 W JP 2020020977W WO 2021240696 A1 WO2021240696 A1 WO 2021240696A1
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Prior art keywords
mass
continuous casting
mold
self
base material
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PCT/JP2020/020977
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English (en)
Japanese (ja)
Inventor
潤平 徳本
浩郁 森園
正人 高田
圭祐 山本
喬玄 鬼木
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三島光産株式会社
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Priority to JP2022527367A priority Critical patent/JPWO2021240696A1/ja
Priority to PCT/JP2020/020977 priority patent/WO2021240696A1/fr
Publication of WO2021240696A1 publication Critical patent/WO2021240696A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
    • B22D11/059—Mould materials or platings

Definitions

  • the present invention relates to a method for manufacturing a mold for continuous casting and a mold for continuous casting used for manufacturing steel and the like, and more specifically, for a mold for continuous casting and a mold for continuous casting having excellent heat resistance, corrosion resistance and abrasion resistance. Regarding the method of manufacturing a mold.
  • Patent Document 1 in a method for manufacturing a mold for continuous casting in which a roughened base plating layer and a sprayed coating are sequentially formed on the contact surface side of molten steel, Co: 5% by mass or more and 15% by mass or less.
  • cermet material composed of 2% by mass or more and 6% by mass or less, and the balance WC, and a granular Ni—Al alloy containing Al of more than 0 and 8% by mass or less are mixed and formed.
  • sprayed particles containing 20% by mass or more and 60% by mass or less of the whole as a Ni—Al alloy are sprayed by a flame sprayer to form a sprayed coating in which the Ni—Al alloy is present at the grain boundaries of the cermet material. ..
  • Patent Document 2 is a method of coating a self-soluble alloy with a (semiconductor) laser beam, which irradiates a powder material to be a material of a coating layer with a laser beam to directly coat a base material.
  • plating has the disadvantages that the construction time is long and large-scale equipment is required. Further, although the construction time is short, thermal spraying has a drawback that the copper plate is thermally deformed due to the influence of high temperature heat treatment, and the dimensional accuracy and flatness accuracy are liable to decrease.
  • Patent Document 1 The thermal spray coating described in Patent Document 1 is a type that does not require high-temperature heat treatment after the film is applied, and is in a point of ensuring strong adhesion to the base material and the base material as compared with the type that is heat-treated after the film is applied. There was a challenge.
  • Patent Document 2 describes a method for coating a self-soluble alloy, which forms a coating layer by irradiating a laser beam from a semiconductor laser device while supplying self-soluble alloy particles to the surface of a copper plate to melt and solidify the self-soluble alloy. It has been proposed, and unlike a general thermal spray coating that requires heat treatment after thermal spraying, the problem of thermal deformation can be improved. Further, as compared with the thermal spray coating of Patent Document 1 and the like, stronger adhesion to the substrate can be ensured.
  • Patent Document 2 it cannot be said that the material components of the coating layer, the structure of the coating layer, the manufacturing conditions of the coating layer, and the like are sufficiently studied, and these improvements are necessary.
  • the present invention has been made in view of such circumstances, and is a continuous casting mold having excellent heat resistance, corrosion resistance, and abrasion resistance, having a coating film having few foreign substances, being dense, and having excellent adhesion to a substrate. It is an object of the present invention to provide a method for manufacturing a casting mold.
  • the continuous casting mold according to the first invention according to the above object has a self-soluble alloy coating layer formed by laser cladding on the molten steel contact surface of the base material of the continuous casting mold.
  • Ni, Co, and Fe are preferably used as the main component metal of the self-soluble alloy, but the metal is not limited thereto. Further, these metals may be used in combination of two or more types (the same applies to the second invention).
  • the self-soluble alloy preferably contains aluminum.
  • the self-soluble alloy contains (1) Ni as a main component metal, Cr: 0 to 26% by mass, B: 1 to 4.5% by mass, Si: 0. 5 to 5% by mass, C: 0.4 to 3% by mass, Fe: 0 to 5% by mass, Co: 0 to 1% by mass, Al: 1 to 5% by mass, Mo: 0 to 20% by mass, Nb: A Ni-based self-soluble alloy containing 0 to 4% by mass, W: 0 to 5% by mass, Mn: 0 to 2% by mass, V: 0-1% by mass, (2) Co as a main component metal, Cr: 5 to 30% by mass, Si: 0.5 to 3% by mass, C: 0.05 to 3% by mass, Fe: 0 to 2% by mass, Mo: 0 to 30% by mass, W: 0 to 15% by mass.
  • Co-based self-soluble alloy and (3) Fe as main components Cr: 0 to 30% by mass, Si: 0.3 to 1.3% by mass, C: 0 to 3% by mass, Ni: 0 It is more preferably any one of Fe-based self-soluble alloys containing ⁇ 16% by mass and Mo: 0 to 5% by mass.
  • Cr, Fe, Co, Mo, Nb, W, Mn and V in the Ni-based self-soluble alloy, Fe, Mo and W in the Co-based self-soluble alloy, and Cr, C, Ni and Mo in the Fe-based self-soluble alloy. is not an essential component, but an optional component whose content can be selected within the above range (including 0) (the same applies to the second invention).
  • the coating layer may be multi-layered, and the coefficient of linear expansion may decrease from the layer closest to the substrate to the layer farthest from the substrate.
  • the content of the main component metal of the self-soluble alloy decreases from the layer closest to the base material to the layer farthest from the layer of the multi-layered coating layer. Is preferable.
  • the self-soluble alloy may be mixed with carbide, boride, siliceous or nitride ceramics.
  • a base layer formed by plating or laser cladding may be provided between the base material and the coating layer.
  • a coating layer of a self-fluxing alloy is formed on the molten steel contact surface of the base material of the mold for continuous casting by laser cladding.
  • the self-soluble alloy preferably contains aluminum.
  • the self-soluble alloy contains (1) Ni as a main component metal, Cr: 0 to 26% by mass, B: 1 to 4.5% by mass, Si. : 0.5 to 5% by mass, C: 0.4 to 3% by mass, Fe: 0 to 5% by mass, Co: 0-1% by mass, Al: 1 to 5% by mass, Mo: 0 to 20% by mass.
  • Nb 0 to 4% by mass
  • W 0 to 5% by mass
  • Mn 0 to 2% by mass
  • V 0-1% by mass
  • Ni-based self-soluble alloy (2) Co as a main component metal , Cr: 5 to 30% by mass, Si: 0.5 to 3% by mass, C: 0.05 to 3% by mass, Fe: 0 to 2% by mass, Mo: 0 to 30% by mass
  • W 0 to 15 Co-based self-soluble alloy containing mass% and (3) Fe as the main component metal, Cr: 0 to 30% by mass, Si: 0.3 to 1.3% by mass, C: 0 to 3% by mass, It is more preferable that any one of the Fe-based self-soluble alloys containing Ni: 0 to 16% by mass and Mo: 0 to 5% by mass is used.
  • the coating layer may be multi-layered and the coefficient of linear expansion may be reduced from the layer closest to the substrate to the layer farthest from the substrate.
  • the content of the main component metal of the self-soluble alloy is reduced from the layer closest to the substrate to the layer farthest from the layer of the multilayer coating layer. It is preferable to let it.
  • a carbide, a boride, a siliceate or a nitride ceramic can be mixed with the self-soluble alloy.
  • a base layer may be formed between the base material and the coating layer by plating or laser cladding.
  • a coating layer of a self-fluxing alloy is formed on the molten steel contact surface of the base material by laser cladding.
  • the aluminum having a strong oxidizing action improves the deoxidizing effect, reduces foreign substances (bubbles and oxides) contained in the coating layer, and at the same time.
  • the abrasion resistance of the coating layer can be improved by precipitation hardening of Ni 3 Al.
  • the self-soluble alloy contains (1) Ni as a main component metal, Cr: 0 to 26% by mass, B: 1 to 4.5% by mass, Si: 0.5 to 5% by mass. %, C: 0.4 to 3% by mass, Fe: 0 to 5% by mass, Co: 0 to 1% by mass, Al: 1 to 5% by mass, Mo: 0 to 20% by mass, Nb: 0 to 4% by mass. %, W: 0 to 5% by mass, Mn: 0 to 2% by mass, V: 0 to 1% by mass, Ni-based self-soluble alloy, (2) Co as the main component metal, Cr: 5 to 30% by mass.
  • the coating layer can be densified to improve the adhesion to the substrate.
  • the linear expansion of each layer occurs.
  • the coefficient can be easily adjusted.
  • the self-soluble alloy when the self-soluble alloy is mixed with carbide, boride, siliceous or nitride ceramics, it is possible to suppress a decrease in hardness of the coating layer and improve wear resistance.
  • the absorption rate of laser light can be increased and the coating layer can be efficiently formed.
  • the adhesion of the coating layer can be improved.
  • the heat of the laser light is suppressed from diffusing to the base material such as copper having a low thermal conductivity, and the self-soluble alloy is formed. It can be melted efficiently, and the rapid cooling of the coating layer can be prevented, and the occurrence of cracks can be prevented.
  • the base material when the base material is cooled while the base material is irradiated with the laser beam, the base material is prevented from being heated to a temperature higher than the softening point by the laser light, and the strength of the base material is reduced and the base material is cracked. Occurrence can be effectively prevented.
  • the method for manufacturing a continuous casting mold according to the first embodiment of the present invention shown in FIG. 1 improves the heat resistance, corrosion resistance, and abrasion resistance of the base material 10 of the continuous casting mold used for manufacturing steel and the like. It is something that makes you.
  • a coating layer of a self-soluble alloy is applied to the molten steel contact surface of the base material 10 of a continuous casting mold made of copper or a copper alloy (for example, Cu—Cr—Zr, etc.) by laser cladding. 12 is formed.
  • the laser processing head 13 irradiates the molten steel contact surface of the base material 10 with the laser beam 14, and the powder supply unit 15 applies the self-soluble alloy as the raw material of the coating layer 12 to the molten steel contact surface of the base material 10.
  • the powder 16 is heated by the laser beam 14 and melted, and welded to the molten steel contact surface of the base material 10 to form the coating layer 12.
  • a strip-shaped coating layer 12 is continuously formed on the molten steel contact surface of the base material 10, and eventually the entire molten steel contact surface of the base material 10 is coated with a laser cladding of a self-fluxing alloy. It can be covered with layer 12.
  • the structure of the laser processing head including the arrangement of the powder supply unit is not limited to this embodiment, as long as the powder can be sprayed to the irradiation position of the laser beam, and can be appropriately selected.
  • the powder supply unit may not be integrated with the laser processing head but may be separated.
  • the self-soluble alloy preferably contains aluminum, and more specifically, Ni is the main component metal, Cr: 0 to 26% by mass, B: 1 to 4.5% by mass, Si: 0.5 to 5% by mass, C: 0.4 to 3% by mass, Fe: 0 to 5% by mass, Co: 0 to 1% by mass, Al: 1 to 5% by mass, Mo: 0 to 20% by mass, Nb: 0 to A Ni-based self-soluble alloy containing 4% by mass, W: 0 to 5% by mass, Mn: 0 to 2% by mass, and V: 0 to 1% by mass is preferably used.
  • the self-soluble alloy contains aluminum, the deoxidizing effect can be improved by the strong oxidizing action of aluminum, and foreign substances (bubbles and oxides) contained in the coating layer 12 can be reduced. Further, when the self-soluble alloy contains Ni as the main component metal, the wear resistance of the coating layer 12 can be improved by precipitation hardening of Ni 3 Al. Furthermore, by containing B (boron) and Si (silicon), the melting point of the main component metal such as Ni is lowered, and at the same time, it is combined with the air (oxygen) adhering to Ni in the molten state to form borosilicate glass. It can be formed and floated, exert a deoxidizing action to densify the coating layer 12, and improve the adhesion to the base material 10.
  • B boron
  • Si silicon
  • the self-soluble alloy in addition to the Ni-based self-soluble alloy containing Ni as the main component metal, a Co-based self-soluble alloy containing Co as the main component metal and an Fe-based self-soluble alloy containing Fe as the main component metal are used.
  • Co is the main component metal, Cr: 5 to 30% by mass, Si: 0.5 to 3% by mass, C: 0.05 to 3% by mass, Fe: 0 to 2 Co-based self-soluble alloy containing mass%, Mo: 0 to 30% by mass, W: 0 to 15% by mass, and Fe as main components, Cr: 0 to 30% by mass, Si: 0.3 to 1
  • a Fe-based self-soluble alloy containing 3% by mass, C: 0 to 3% by mass, Ni: 0 to 16% by mass, and Mo: 0 to 5% by mass is preferably used.
  • the components of the self-soluble alloy can be appropriately selected.
  • carbide ceramics WC, NbC, etc.
  • boride ceramics siliceous ceramics, or nitride ceramics
  • nitride ceramics may be selected as the self-soluble alloy. It can be mixed to suppress the decrease in hardness and improve wear resistance
  • MC alloy Ni-Cr-Fe, Cr 45%
  • Cr solid-dissolved in Ni is used to resist glassy acidity and corrosion resistance. It can also improve sex.
  • the wavelength and energy density of the laser beam can be appropriately selected according to the components of the self-soluble alloy and the components of the base material.
  • the base material 10 made of copper or a copper alloy has a very high thermal conductivity, and the heat input during irradiation with the laser beam 14 diffuses at high speed to facilitate cooling, so that the coating layer on the base material 10 is easy to cool. Welding of 12 is inhibited. Therefore, the base material 10 is preheated before the start of irradiation of the base material 10 with the laser beam 14, the heat of the laser light 14 is suppressed from being diffused to the base material 10, the self-soluble alloy is efficiently melted, and the coating is applied. Prevents rapid cooling of the layer 12 and prevents the occurrence of cracks.
  • the base material 10 when the base material 10 is irradiated with the laser beam 14 to heat the base material 10 above the softening point and the strength of the base material 10 decreases, the base material 10 may be cracked. Therefore, the base material 10 is cooled while the base material 10 is irradiated with the laser beam 14 to prevent the base material 10 from being heated above the softening point by the laser light 14, and the strength of the base material 10 is lowered and cracks are generated. To prevent. Therefore, while the base material 10 is irradiated with the laser beam 14 to form the coating layer 12, it is necessary to maintain the base material 10 in a predetermined temperature range while balancing the cooling and heating of the base material 10. be. The types and combinations of the heating means (not shown) for preheating the base material 10 and the cooling means (not shown) for cooling the base material 10 can be appropriately selected.
  • the method for manufacturing the continuous casting mold according to the second embodiment is different from that of the first embodiment in that the coating layer 19 is multi-layered on the base material 10 of the continuous casting mold (here). Then, it is a point formed by forming 5 layers). Then, by reducing the linear expansion coefficient from the layer 20a closest to the base material 10 toward the layer 20e farthest from the base material 10, cracking of the coating layer 19 can be effectively prevented.
  • each layer 20a to The coefficient of linear expansion of 20e can be easily adjusted, but the method for adjusting the coefficient of linear expansion can be appropriately selected.
  • the other manufacturing methods are the same as those in the first embodiment.
  • the method for manufacturing the continuous casting mold according to the third embodiment differs from the first and second embodiments between the base material 10 and the coating layer 22 of the continuous casting mold.
  • the base layer 23 is formed by plating or laser cladding.
  • the coating layer 22 may be formed of the same material as the coating layer 12, or may be multi-layered like the coating layer 19, and other manufacturing methods are the same as in the first embodiment.
  • the base layer 23 when the base layer 23 is formed by plating, it is carried out in a plating bath at about 50 ° C., and Ni or the like is preferably used as the material.
  • the manufacturing method is the same as that of the first embodiment, and Ni, Ni—Al, Ni—Cu or the like is preferably used as the material.
  • the heat resistance, corrosion resistance and abrasion resistance of the mold for continuous casting can be improved as compared with the conventional case, and the life can be extended. It is possible to reduce the labor and cost required for maintenance of the continuous casting mold in the manufacturer and promote the spread of new continuous casting molds.

Abstract

La présente invention concerne : un moule de coulée continue utilisé dans la fabrication d'acier ou similaire; et un procédé de fabrication du moule de coulée continue. Une couche de revêtement (12) en alliage auto-fusible est formée, par placage au laser, sur une surface de contact avec de l'acier fondu d'un matériau de base (10) d'un moule de coulée continue, la couche de revêtement contenant moins de corps étrangers, étant formée de manière dense et ayant une excellente adhérence au matériau de base (10). Du fait de ce qui précède, un moule de coulée continue ayant une excellente durabilité vis-à-vis de la chaleur, de la corrosion et du frottement peut être obtenu.
PCT/JP2020/020977 2020-05-27 2020-05-27 Moule de coulée continue et procédé de fabrication d'un moule de coulée continue WO2021240696A1 (fr)

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Cited By (2)

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CN116555758A (zh) * 2023-07-07 2023-08-08 汕头华兴冶金设备股份有限公司 一种金属陶瓷梯度涂层及其制备方法与应用
CN117418143A (zh) * 2023-12-19 2024-01-19 汕头大学 陶瓷增强金属基复合材料梯度涂层及其制备方法与应用

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