WO2009150868A1 - 耐Mnビルドアップ性、耐熱衝撃性、耐摩耗性に優れたハースロール、及び、その溶射材料 - Google Patents
耐Mnビルドアップ性、耐熱衝撃性、耐摩耗性に優れたハースロール、及び、その溶射材料 Download PDFInfo
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- WO2009150868A1 WO2009150868A1 PCT/JP2009/053432 JP2009053432W WO2009150868A1 WO 2009150868 A1 WO2009150868 A1 WO 2009150868A1 JP 2009053432 W JP2009053432 W JP 2009053432W WO 2009150868 A1 WO2009150868 A1 WO 2009150868A1
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- resistance
- build
- hearth roll
- thermal spray
- thermal
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/14—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment
- F27B9/20—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace
- F27B9/24—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace being carried by a conveyor
- F27B9/2407—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace being carried by a conveyor the conveyor being constituted by rollers (roller hearth furnace)
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/54—Furnaces for treating strips or wire
- C21D9/56—Continuous furnaces for strip or wire
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/06—Metallic material
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/10—Oxides, borides, carbides, nitrides or silicides; Mixtures thereof
- C23C4/11—Oxides
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/02—Skids or tracks for heavy objects
- F27D3/026—Skids or tracks for heavy objects transport or conveyor rolls for furnaces; roller rails
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- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24628—Nonplanar uniform thickness material
Definitions
- the present invention relates to a hearth roll for transporting a steel plate disposed in a continuous heat treatment furnace and a thermal spray material thereof, and in particular, a hearth roll excellent in Mn build-up resistance, thermal shock resistance, and wear resistance and thermal spraying thereof. It relates to materials.
- a hearth roll placed in a steel plate heat treatment furnace is used for a long time in a weakly oxidizing or reducing atmosphere at 600 to 1300 ° C. For this reason, the following characteristics are mainly required on the surface of the hearth roll.
- Fe oxide or iron powder adheres to the steel sheet, and during transportation of the steel sheet, these Fe oxide or iron powder adheres and accumulates on the surface of the hearth roll to form a build-up. Furthermore, in recent years, build-up of Mn oxide has become a problem due to an increase in high-tensile steel and changes in furnace operating conditions. Therefore, the hearth roll is required to have build-up resistance against Fe-based materials and Mn-based materials.
- the hearth roll Since the hearth roll slides and wears when the steel plate contacts the hearth roll during conveyance, the hearth roll is required to have wear resistance.
- the coating on the surface of the hearth roll may be peeled off due to sliding wear, build-up, or thermal shock. Further, when the steel sheet comes into contact with the hearth roll from which the film has been peeled off, wrinkles are generated on the surface of the steel sheet, causing deterioration in quality.
- Patent Document 1 discloses a heat treatment furnace roll having a ceramic film made of Ti-based nitride or Ti-based carbide and excellent in build-up resistance and wear resistance.
- Ti-based nitrides and Ti-based carbides are materials having excellent wear resistance and build-up resistance.
- Patent Document 3 discloses a microscopic structure in which TiN particles covered with a metal oxide layer (excluding iron oxide) stable at 1400 ° C. are dispersed in a metal (excluding iron and iron alloy) matrix made of a refractory metal at 900 ° C.
- a hearth roll having a surface coating layer composed of two layers, a surface layer having a structure and a bonding metal layer as a base of the surface layer.
- the wear resistance and thermal shock resistance of the coating are improved by making the coating cermet and providing a bonding layer between the coating and the roll base material.
- TiN was coated with a metal to prevent oxidation of TiN during thermal spraying, and the coated metal became an oxide to have abradability and improve buildup resistance.
- Patent Document 2 has a general formula MCrAlY having an Al content of 10 at% or less and an (Al + Cr) content of 13 at% or more and 31 at% or less (wherein M is selected from the group consisting of Fe, Ni and Co).
- a hearth roll having a thermal spray coating made of a cermet thermal spray material obtained by mixing a heat resistant alloy of one metal element) with an oxide having a low manganese oxide reactivity and a weight ratio of 5 to 90% is disclosed.
- Patent Document 4 contains Cr: 5 to 35% by mass, C: 3% by mass or less, and Ni: 3 to 25% by mass, W: 3 to 25% by mass, and Ta: 3 to 25% by mass.
- One or more selected from oxide-based ceramics, carbide-based ceramics, and boride-based ceramics in an alloy containing a total of 3 to 40% by mass of one or more types and the balance Co and inevitable impurities A hearth roll surface coating material is disclosed, which is a composite material in which 5 to 80% by mass of several kinds of ceramics are dispersed, and the Al component in the composite material is 1% by mass or less in terms of Al.
- Patent Document 5 is a thermal spraying powder for an in-furnace roll formed by mixing an alloy powder and a ceramic powder to form a coating by spraying on the roll surface, and the alloy powder contains Al with respect to the total amount of the alloy powder. 3 to 8 mass%, the balance being one or more alloy powders selected from Co and Ni, and 40 to 80 mass% with respect to the total amount of the sprayed powder. Disclosed is a thermal spray powder comprising 10-30 mass% Y 2 O 3 and Cr 3 C 2 . JP-A-63-250449 JP-A-8-67960 JP-A-10-195547 Japanese Patent Laid-Open No. 2002-256363 JP-A-2003-27204
- Fe is the main component of build-up, but in recent years, the main component of build-up has changed from Fe to Mn due to an increase in high-tensile steel, furnace operating conditions, and other changes.
- Patent Document 3 the oxidation of TiN during spraying cannot be sufficiently prevented, and the flight time of the sprayed material is too short (on the order of several msec), so that the coating metal is hardly oxidized, The build-up resistance was not sufficient.
- Patent Document 2 when the ratio of MCrAlY is large, the thermal shock resistance and wear resistance are improved, but the build-up resistance due to the limited content of Al and Cr was not sufficiently obtained. . Moreover, when the ratio of ceramics was large, the thermal shock resistance and wear resistance were insufficient.
- Patent Document 5 in order to compensate for the drawbacks in Patent Document 4, Al in the matrix is reduced from that of Patent Document 2 to 3 to 8% and Cr is eliminated, but Al is contained to some extent. Therefore, buildup could not be prevented sufficiently, and since there was no Cr, the oxidation resistance was inferior, and sufficient effects could not be exhibited.
- the present invention has been made to solve such problems, and has a long-life hearth roll having excellent build-up resistance to Mn-based materials, and having excellent thermal shock resistance and wear resistance.
- the purpose is to provide.
- the thermal spray material sprayed on the surface of the hearth roll of the present invention is made of Al-containing refractory metals (including alloys) that can be used at 900 ° C. or higher, and one or two or more types.
- a rare earth element (Sc, Y, lanthanum and lanthanoid) and group 3A of the periodic table, and a transition metal double oxide excluding Zr, Hf and Fe, and the content of Al is A (mol), the rare earth element ( When the content of Sc, Y, lanthanum and lanthanoid is B (mol), the condition of 0.3 ⁇ (A / B) ⁇ 4.0 is satisfied.
- MAl (M is composed of two or more kinds of transition metals excluding Ag, Cu and Mn in the periodic table) or MAl (RE) (M is Group 3A in the periodic table, Ag , Cu and Mn, and (RE) is a rare earth element).
- the above-mentioned sprayed material can be sprayed on the roll surface of the hearth roll.
- the thickness of the sprayed film on the roll surface is preferably set to 10 ⁇ m or more and 1000 ⁇ m or less.
- a hearth roll having excellent build-up resistance, thermal shock resistance, and wear resistance for a Mn-based material and having a long life.
- the MnAl double oxide produced mainly on the surface of the hearth roll is the starting point of the buildup.
- This MnAl composite oxide is presumed that Al present in the vicinity of the roll surface or Al 2 O 3 produced by oxidation and MnO provided by the steel sheet are produced by the following reaction.
- the thermal spray coating containing Al is formed on the surface layer of the hearth roll, and the steel sheet conveyed by the hearth roll contains Mn.
- the present inventors do not reduce the Al content, but one or more rare earth elements (Sc, Y, lanthanum and lanthanoid) and 3A group of the periodic table, Zr, Hf in the film. And transition metal double oxides except Fe were mixed.
- the Al in the refractory metal the Al necessary for obtaining oxidation resistance was left, and the others were successfully changed to a complex oxide that was hardly reactive with MnO.
- Mn build-up resistance thermal shock resistance, and wear resistance and oxidation resistance.
- it is not affected by the Al content in the refractory metal and need not be limited.
- Al can be made to be a hardly reactive double oxide with MnO mainly by the reaction represented by the following formula.
- the thermal spray material applied to the hearth roll excellent in Mn build-up resistance, thermal shock resistance, and wear resistance of the present embodiment includes a heat-resistant metal (including an alloy) that can be used at 900 ° C. or higher including Al, and a rare earth Element (Sc, Y, lanthanum and lanthanoid) and group 3A of the periodic table, and transition metal double oxides excluding Zr, Hf and Fe.
- a heat-resistant metal including an alloy
- a rare earth Element Sc, Y, lanthanum and lanthanoid
- transition metal double oxides excluding Zr, Hf and Fe.
- the reason for excluding Zr, Hf and Fe is that Al hardly reacts with oxygen.
- the refractory metal is MAl (M is a transition metal element excluding 3A group of the periodic table, Ag, Cu and Mn (Ti, V, Cr, Co, Ni, Nb, Mo, Tc, Ru, Rh, Pd, Ta, W, Re, Os, Ir, Pt, Au) or MAl (RE) (M is a transition metal element excluding 3A group of the periodic table, Ag, Cu and Mn (Ti, V, Cr, Co, Ni, Nb, Mo, Tc, Ru, Rh, Pd, Ta, W, Re, Os, Ir, Pt, Au), and (RE) is a rare earth element 1 More specifically, it is composed of one of Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu.
- FeCrAlY, NiCrAlY, CoCrAlY, CoNiCrAlY, FeCrAl, NiCrAl, CoCrAl, CoNiCrAl can be used as the refractory metal.
- transition metal contained in the double oxide Preferably, Cr, Co, Ni, Cu, Nb, Mo, Ta, and W can be used as the transition metal contained in the double oxide.
- non-metals such as C and Si, can also be contained in a heat-resistant metal. More preferably, it is a transition metal element that can be reduced to Al at a temperature of 500 ° C. or higher.
- the content of Al contained in the thermal spray material (heat-resistant metal) is A (mole) and the content of rare earth elements (Sc, Y, lanthanum and lanthanoid) contained in the thermal spray material is B (mole)
- a The composition ratio must be set so that / B) is 0.3 to 4.0.
- (A / B) is lower than 0.3, there are too many rare earth elements (too much added double oxide), and the thermal shock resistance value of the thermal spray coating becomes low.
- (A / B) is higher than 4.0, there is too much Al and build-up resistance is lowered.
- the composition ratio of Al and rare earth elements (Sc, Y, lanthanum and lanthanoid) is set so that (A / B) is 0.5 to 2.0.
- the double oxide of the present embodiment is fired after mixing rare-earth elements (Sc, Y, lanthanum and lanthanoid) and oxides obtained by oxidizing transition metals excluding group 3A of the periodic table, Zr, Hf and Fe, respectively. Can be manufactured.
- rare-earth elements Sc, Y, lanthanum and lanthanoid
- heat resistant metal powder containing fine Al that can be used at 900 ° C. or higher, fine rare earth elements (Sc, Y, lanthanum and lanthanoid), and group 3A of the periodic table
- It can also be obtained by adding an organic binder to a double oxide powder of transition metal excluding Zr, Hf and Fe and granulating.
- granulation method a general spray granulation method, a fluidized bed granulation method, a mechanical alloying method, or the like can be used.
- the above reaction occurs by heating during thermal spraying, and it is possible to generate a rare earth element and Al double oxide. However, by debinding and sintering, the rare earth element and Al double oxidation at the stage of the thermal spray material. It is more preferable to promote the production of the product.
- the thermal spraying method of the thermal spray material of this embodiment is not particularly limited, but flame spraying, plasma spraying, HVOF spraying, explosion spraying, and the like can be applied. Among them, HVOF spraying and explosion spraying that can form a dense film with little thermal influence are preferable.
- the thickness of the sprayed coating is preferably 10 ⁇ m or more and 1000 ⁇ m or less. When the thickness is less than 10 ⁇ m, the effect of the film cannot be exhibited. When the thickness is larger than 1000 ⁇ m, the residual stress is large and the film may be peeled off.
- M′CrAlY (M ′ is one or more metal elements selected from Fe, Ni, Co), NiCr between the thermal spray coating and the roll base material.
- a base sprayed coating such as an alloy, Hastelloy alloy, Inconel alloy, Ni—Al, or Mo may be interposed. In this case, the base sprayed coating corresponds to the roll surface according to claim 4.
- the thermal spray material according to the embodiment of the present invention has a thermal spray coating formed on the surface of the hearth roll substrate, thereby providing excellent build-up resistance, thermal shock resistance, and wear resistance against Mn.
- a long-life hearth roll can be provided.
- TP a test piece
- SUS304 for Mn build-up resistance test: 15 ⁇ 15 ⁇ 10 mm, for wear resistance test: 30 ⁇ 50 ⁇ 5 mm, thermal shock resistance For testing: 50 ⁇ 50 ⁇ 10 mm
- a coating was laminated on the TP surface by a thermal spraying method (high-speed gas spraying method), and the following tests were performed.
- FIG. 1 is a schematic view of a testing machine for evaluating the Mn build-up resistance of TP.
- the sprayed films 11A and 12A of the two sprayed TP11 and TP12 are arranged to face each other, the buildup raw material MnO powder is sandwiched between the sprayed films 11A and 12A, and a load is applied from above the TP11. This was placed in an electric furnace and allowed to stand for about 25 hours at a constant temperature of 950 ° C. in a reducing atmosphere of N 2 -5% H 2 . Table 1 shows the test conditions.
- EPMA electron beam microanalyzer
- FIG. 2 is a schematic view of a testing machine for evaluating the wear resistance of TP.
- the following test was performed to evaluate the wear resistance.
- a “Suga-type wear tester” was used for the experiment.
- An emery paper 22 is wound around the outer surface of the rotating roller 21.
- the thermal spray coating 31 ⁇ / b> A of TP ⁇ b> 31 is in contact with the emery paper 22.
- TP31 can reciprocate in the horizontal direction. Table 2 shows the test conditions.
- the TP 31 is reciprocated once in the horizontal direction, and the spray coating 31A is slid against the emery paper 22.
- the rotating roller 21 is slightly rotated to bring the unused surface of the emery paper 22 into contact with the thermal spray coating 31A.
- the abrasion resistance is evaluated by the number of reciprocations of TP required to wear 1 mg of the thermal spray coating [Double Stroke (DS) / mg]. Those with a TP reciprocation frequency of less than 20 DS / mg were evaluated as poor (x), and those with 20 DS / mg or more were evaluated as good ( ⁇ ).
- thermo shock resistance The following test was performed to evaluate the thermal shock resistance.
- the TP (50 ⁇ 50 ⁇ 10 mm) on which the thermal spray coating was laminated was heated in an electric furnace, then cooled with water, and evaluated by the presence or absence of peeling of the thermal spray coating. Excellent when the thermal spray coating does not peel in 30 repeat tests (Excellent), Excellent when the thermal spray coating does not peel after 20 repeat tests (O), Exfoliated after less than 20 repeat tests Was evaluated as defective (x). Table 3 shows the test conditions.
- Table 4A shows the compositions of Invention Examples 1 to 43
- Table 4B shows the compositions of Comparative Examples 1 to 12.
- Table 5 shows the test results and evaluation of Mn build-up resistance, thermal shock resistance, and wear resistance
- Table 5A shows Invention Examples 1 to 43
- Table 5B shows Comparative Examples 1 to 12. ing. When all the evaluation items were good ( ⁇ ) or higher, the overall evaluation was good ( ⁇ ). When all the evaluation items were good ( ⁇ ) or more and two or more of the evaluation items were excellent ( ⁇ ), the overall evaluation was excellent ( ⁇ ). A single item with a bad ( ⁇ ) evaluation was evaluated as a comprehensive evaluation failure ( ⁇ ).
- Inventive Examples 1 to 43 are formed by forming a thermal spray coating on the TP surface by a thermal spraying method, and the thickness is set in the range of 10 to 1000 ⁇ m.
- the Al content (A mol) contained in the refractory metal / in the coating The value of the total rare earth element content (B mole) is set to 0.3 to 4.0.
- Invention Examples 1 to 43 showed good results in the Mn build-up test, the wear resistance test, and the thermal shock resistance test. Among them, for a thermal sprayed coating having a value of Al content (A mole) contained in the refractory metal / total rare earth element content (B mole) in the coating of 0.5 to 2.0, an Mn build-up test, In the thermal shock resistance test, the evaluation was excellent ( ⁇ ), and the overall evaluation was excellent ( ⁇ ).
- Comparative Examples 1 and 2 the value of Al content (A mole) contained in the refractory metal / total rare earth element content (B mole) in the film is out of the range of 0.3 to 4.0. This is different from Invention Examples 1-6. As shown in Table 5, Comparative Example 1 has poor thermal shock resistance test results, Comparative Example 2 has poor total Mn adhesion thickness and Mn penetration depth in Mn build-up resistance test, and overall evaluation is poor ( X).
- Comparative Examples 3 and 4 the value of Al content (A mole) contained in the refractory metal / total rare earth element content (B mole) in the film is outside the range of 0.3 to 4.0. This is different from Invention Examples 7 to 10. As shown in Table 5, in Comparative Example 3, the thermal shock resistance test result is poor, and in Comparative Example 4, the total of Mn adhesion thickness and Mn penetration depth in the Mn build-up resistance test is poor, and the overall evaluation is poor ( X).
- Comparative Examples 5 and 6 the value of Al content (A mole) contained in the refractory metal / total rare earth element content (B mole) in the film is outside the range of 0.3 to 4.0. This is different from Invention Examples 11-14. As shown in Table 5, Comparative Example 5 has a poor thermal shock resistance test result, and Comparative Example 6 has a poor Mn adhesion thickness and Mn penetration depth in the Mn build-up resistance test. X).
- Comparative Examples 7 and 8 the value of Al content (A mole) contained in the refractory metal / total rare earth element content (B mole) in the film is outside the range of 0.3 to 4.0. This is different from Invention Examples 15 to 18. As shown in Table 5, Comparative Example 7 has a poor thermal shock resistance test result, and Comparative Example 8 has a poor total evaluation of Mn adhesion thickness and Mn penetration depth in the Mn build-up resistance test. )
- Comparative Examples 9 and 10 the value of Al content (A mole) contained in the refractory metal / total rare earth element content (B mole) in the film is out of the range of 0.3 to 4.0. This is different from Invention Examples 19-22. As shown in Table 5, Comparative Example 9 has poor thermal shock resistance test results, Comparative Example 10 has poor total Mn adhesion thickness and Mn penetration depth in the Mn build-up resistance test, and the overall evaluation is poor ( ⁇ )
- Comparative Examples 11 and 12 the value of Al content (A mole) contained in the refractory metal / total rare earth element content (B mole) in the film is outside the range of 0.3 to 4.0. This is different from Invention Examples 23 to 26. As shown in Table 5, Comparative Example 11 has a poor thermal shock resistance test result, and Comparative Example 12 has a poor total evaluation of Mn adhesion thickness and Mn penetration depth in the Mn build-up resistance test. )
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Abstract
Description
本発明者らの研究の結果、主としてハースロールの表面に生成するMnAl複酸化物がビルドアップの起点となることを確認した。このMnAl複酸化物はロール表面近傍に存在するAlまたは酸化生成するAl2O3と鋼板によってもたらされるMnOが次のような反応で生じるものと推測される。なお、ハースロールの表層にはAlを含む溶射皮膜が形成されており、ハースロールによって搬送される鋼板にはMnが含まれる。
Mn+1/2O2→MnO (Mnの再酸化)
2Al+3/2O2→Al2O3 (Alが酸化しAl2O3を生成)
Al2O3+MnO→MnAl2O4 (生成したAl2O3とMnOによるMnAl複酸化物の生成)
Al+(RE)JxOy→(RE)AlOy+xJ
RE:希土類元素
J:周期律表の3A族、Zr、Hf及びFeを除く遷移金属
x,y:REおよびJの価数により決まる係数
次に、本発明の耐Mnビルドアップ性、耐熱衝撃性、耐摩耗性に優れるハースロール及びその溶射材料について、実施例を示し、より詳細に説明する。ただし、本発明の耐Mnビルドアップ性、耐熱衝撃性、耐摩耗性に優れるハースロール及びその溶射材料は、以下の実施例に限定されるものではない。
図1は、TPの耐Mnビルドアップ性を評価する試験機の概略図である。2枚の溶射TP11、TP12の溶射膜11A、12Aを対向配置して、溶射膜11A、12Aの間にビルドアップ原料MnO粉を挟み、TP11の上方から荷重を加える。これを電気炉内に配置し、N2-5%H2の還元雰囲気中で950℃の一定温度で約25Hr放置した。表1に試験条件を示す。
図2は、TPの耐摩耗性を評価する試験機の概略図である。耐摩耗性を評価するために次の試験を行なった。図2に図示するように、実験には「スガ式摩耗試験機」を使用した。回転ローラ21の外面には、エメリーペーパー22が巻き付けられている。TP31の溶射皮膜31Aは、エメリーペーパー22に接触している。TP31は、水平方向に往復移動可能である。試験条件を表2に示す。
耐熱衝撃性を評価するために次の試験を行なった。溶射皮膜を積層したTP(50×50×10mm)を電気炉内で加熱後、水冷し、溶射皮膜の剥離の有無で評価を行なった。30回の繰り返し試験で溶射皮膜の剥離が無いものを優秀(◎)、20回の繰り返し試験で溶射皮膜の剥離が無いものを良好(○)、20回未満の繰り返し試験で剥離が発生したものは不良(×)として評価した。表3に試験条件を示す。
11A、12A 31A 溶射皮膜
21 回転ローラ
22 エメリーペーパー
Claims (5)
- ハースロールの表面に溶射される溶射材料であって、
Alを含有する900℃以上で使用可能な耐熱金属(合金を含む)と、
1種又は2種以上の希土類元素(Sc、Y、ランタン及びランタノイド)及び周期律表の3A族、Zr、Hf及びFeを除く遷移金属の複酸化物と、からなり、
Alの含有量をA(モル)、希土類元素(Sc、Y、ランタン及びランタノイド)の含有量をB(モル)としたときに、0.3≦(A/B)≦4.0なる条件を満足することを特徴とする溶射材料。 - 前記遷移金属は、Cr、Co、Ni、Cu、Nb、Mo、Ta、Wのいずれかであることを特徴とする請求項1に記載の溶射材料。
- 前記耐熱金属は、MAl(Mは周期律表の3A族、Ag、Cu及びMnを除く遷移金属の2種以上からなる)又はMAl(RE)(Mは周期律表の3A族、Ag、Cu及びMnを除く遷移金属の2種以上からなり、(RE)は希土類元素の1種からなる)であることを特徴とする請求項1又は2に記載の溶射材料。
- 請求項1乃至3のうちいずれか一つに記載の溶射材料によりロール表面が溶射されたハースロール。
- 前記ロール表面の溶射膜は、その膜厚が10μm以上1000μm以下であることを特徴とする請求項4に記載のハースロール。
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BRPI0909979A BRPI0909979A2 (pt) | 2008-06-10 | 2009-02-25 | rolo de aquecimento e material de pulverização térmica |
MX2010011386A MX2010011386A (es) | 2008-06-10 | 2009-02-25 | Rodillo de hogar que tiene excelente resistencia a la acumulacion de manganeso, resistencia al choque termico y resistencia al uso, y material de aspersion termica para el mismo. |
US12/937,635 US20110104449A1 (en) | 2008-06-10 | 2009-02-25 | Hearth roll having excellent mn build-up resistance, thermal shock resistance, and abrasion resistance, and thermal spray material therefor |
JP2010516774A JP5514104B2 (ja) | 2008-06-10 | 2009-02-25 | 耐Mnビルドアップ性、耐熱衝撃性、耐摩耗性に優れたハースロール、及び、その溶射材料 |
CN2009801114098A CN101981220A (zh) | 2008-06-10 | 2009-02-25 | 耐Mn积聚性、耐热冲击性、耐磨耗性优良的炉底辊及其喷镀材料 |
US13/966,448 US20130330520A1 (en) | 2008-06-10 | 2013-08-14 | Hearth roll having excellent mn build-up resistance, thermal shock resistance, and abrasion resistance, and thermal spray material therefor |
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JP2008152045 | 2008-06-10 | ||
JP2008-152045 | 2008-06-10 |
Related Child Applications (1)
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US13/966,448 Division US20130330520A1 (en) | 2008-06-10 | 2013-08-14 | Hearth roll having excellent mn build-up resistance, thermal shock resistance, and abrasion resistance, and thermal spray material therefor |
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WO2009150868A1 true WO2009150868A1 (ja) | 2009-12-17 |
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PCT/JP2009/053432 WO2009150868A1 (ja) | 2008-06-10 | 2009-02-25 | 耐Mnビルドアップ性、耐熱衝撃性、耐摩耗性に優れたハースロール、及び、その溶射材料 |
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US (2) | US20110104449A1 (ja) |
JP (1) | JP5514104B2 (ja) |
KR (1) | KR101391343B1 (ja) |
CN (1) | CN101981220A (ja) |
BR (1) | BRPI0909979A2 (ja) |
MX (1) | MX2010011386A (ja) |
WO (1) | WO2009150868A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2021098877A (ja) * | 2019-12-23 | 2021-07-01 | 日本製鉄株式会社 | 連続焼鈍炉用ハースロール |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
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US8852066B2 (en) * | 2012-08-06 | 2014-10-07 | Nippon Steel Hardfacing Co., Ltd. | Hearth roll having high Mn build-up resistance |
TWI548753B (zh) | 2014-12-30 | 2016-09-11 | 財團法人工業技術研究院 | 組成物及應用其製成之塗層結構 |
JP7424854B2 (ja) * | 2020-02-14 | 2024-01-30 | アルバックテクノ株式会社 | 成膜処理用部品及び成膜装置 |
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JPH0693328A (ja) * | 1992-09-14 | 1994-04-05 | Daido Steel Co Ltd | 酸化物分散強化型合金を用いたハースロール |
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JP4229508B2 (ja) * | 1999-01-29 | 2009-02-25 | 第一高周波工業株式会社 | 高温ハースローラー |
WO2001034866A1 (fr) | 1999-11-09 | 2001-05-17 | Kawasaki Steel Corporation | Poudre de cermet pour revetement pulverise presentant une excellente resistance de montage et rouleau dote de ce revetement pulverise |
DE60127035T2 (de) * | 2000-06-29 | 2007-11-08 | Shin-Etsu Chemical Co., Ltd. | Thermisches Sprühbeschichtungsverfahren und Pulver aus Oxyden der seltenen Erden dafür |
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2009
- 2009-02-25 KR KR1020107021737A patent/KR101391343B1/ko not_active IP Right Cessation
- 2009-02-25 BR BRPI0909979A patent/BRPI0909979A2/pt not_active Application Discontinuation
- 2009-02-25 MX MX2010011386A patent/MX2010011386A/es active IP Right Grant
- 2009-02-25 CN CN2009801114098A patent/CN101981220A/zh active Pending
- 2009-02-25 JP JP2010516774A patent/JP5514104B2/ja active Active
- 2009-02-25 US US12/937,635 patent/US20110104449A1/en not_active Abandoned
- 2009-02-25 WO PCT/JP2009/053432 patent/WO2009150868A1/ja active Application Filing
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2013
- 2013-08-14 US US13/966,448 patent/US20130330520A1/en not_active Abandoned
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JPH0417625A (ja) * | 1990-05-11 | 1992-01-22 | Sumitomo Metal Ind Ltd | ハースロール |
JPH0693328A (ja) * | 1992-09-14 | 1994-04-05 | Daido Steel Co Ltd | 酸化物分散強化型合金を用いたハースロール |
JP2000096204A (ja) * | 1998-09-19 | 2000-04-04 | Nippon Steel Hardfacing Co Ltd | 溶融金属耐食性に優れた皮膜を有する溶融金属浴用部材の製造方法 |
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JP2021098877A (ja) * | 2019-12-23 | 2021-07-01 | 日本製鉄株式会社 | 連続焼鈍炉用ハースロール |
WO2021132226A1 (ja) * | 2019-12-23 | 2021-07-01 | 日本製鉄株式会社 | 連続焼鈍炉用ハースロール |
JP7316923B2 (ja) | 2019-12-23 | 2023-07-28 | 日本製鉄株式会社 | 連続焼鈍炉用ハースロール |
Also Published As
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US20130330520A1 (en) | 2013-12-12 |
MX2010011386A (es) | 2011-02-15 |
US20110104449A1 (en) | 2011-05-05 |
JPWO2009150868A1 (ja) | 2011-11-10 |
BRPI0909979A2 (pt) | 2015-10-27 |
JP5514104B2 (ja) | 2014-06-04 |
KR101391343B1 (ko) | 2014-05-07 |
CN101981220A (zh) | 2011-02-23 |
KR20110025165A (ko) | 2011-03-09 |
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