WO2014014069A1 - Procédé de fabrication d'une soupape d'échappement de moteur pour gros navire - Google Patents

Procédé de fabrication d'une soupape d'échappement de moteur pour gros navire Download PDF

Info

Publication number
WO2014014069A1
WO2014014069A1 PCT/JP2013/069558 JP2013069558W WO2014014069A1 WO 2014014069 A1 WO2014014069 A1 WO 2014014069A1 JP 2013069558 W JP2013069558 W JP 2013069558W WO 2014014069 A1 WO2014014069 A1 WO 2014014069A1
Authority
WO
WIPO (PCT)
Prior art keywords
exhaust valve
less
welding
large vessel
manufacturing
Prior art date
Application number
PCT/JP2013/069558
Other languages
English (en)
Japanese (ja)
Inventor
堀尾　浩次
原　理
義人 鈴木
敦郎 益永
Original Assignee
大同特殊鋼株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2012161610A external-priority patent/JP6011098B2/ja
Application filed by 大同特殊鋼株式会社 filed Critical 大同特殊鋼株式会社
Publication of WO2014014069A1 publication Critical patent/WO2014014069A1/fr

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
    • B21J5/08—Upsetting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00—Making machine elements
    • B21K1/20—Making machine elements valve parts
    • B21K1/22—Making machine elements valve parts poppet valves, e.g. for internal-combustion engines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
    • B23K35/24—Selection of soldering or welding materials proper
    • B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
    • B23K35/3033—Ni as the principal constituent
    • B23K35/304—Ni as the principal constituent with Cr as the next major constituent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
    • B23K35/24—Selection of soldering or welding materials proper
    • B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
    • B23K35/3053—Fe as the principal constituent
    • B23K35/308—Fe as the principal constituent with Cr as next major constituent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
    • B23K35/24—Selection of soldering or welding materials proper
    • B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
    • B23K35/3053—Fe as the principal constituent
    • B23K35/308—Fe as the principal constituent with Cr as next major constituent
    • B23K35/3086—Fe as the principal constituent with Cr as next major constituent containing Ni or Mn
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/04—Welding for other purposes than joining, e.g. built-up welding
    • B23K9/042—Built-up welding on planar surfaces
    • 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
    • C21D7/00—Modifying the physical properties of iron or steel by deformation
    • C21D7/13—Modifying the physical properties of iron or steel by deformation by hot working
    • 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
    • C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C19/00—Alloys based on nickel or cobalt
    • C22C19/03—Alloys based on nickel or cobalt based on nickel
    • C22C19/05—Alloys based on nickel or cobalt based on nickel with chromium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C19/00—Alloys based on nickel or cobalt
    • C22C19/03—Alloys based on nickel or cobalt based on nickel
    • C22C19/05—Alloys based on nickel or cobalt based on nickel with chromium
    • C22C19/058—Alloys based on nickel or cobalt based on nickel with chromium without Mo and W
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/001—Ferrous alloys, e.g. steel alloys containing N
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/54—Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
    • F01L3/02—Selecting particular materials for valve-members or valve-seats; Valve-members or valve-seats composed of two or more materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
    • F01L3/02—Selecting particular materials for valve-members or valve-seats; Valve-members or valve-seats composed of two or more materials
    • F01L3/04—Coated valve members or valve-seats
    • 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
    • C21D2251/00—Treating composite or clad material
    • C21D2251/04—Welded or brazed overlays
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2301/00—Using particular materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2303/00—Manufacturing of components used in valve arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2820/00—Details on specific features characterising valve gear arrangements
    • F01L2820/01—Absolute values

Definitions

  • the present invention relates to a method of manufacturing an engine exhaust valve used for a diesel engine for a large vessel, and more particularly to an engine exhaust valve for a large vessel using at least a part of a Ni-based aging deposited alloy.
  • Heavy oil is mainly used as a fuel in diesel engines for large vessels, and exhaust gases discharged from the combustion chamber contain a large amount of highly corrosive sulfides and the like. Therefore, a metal material having high resistance to high temperature corrosion called S attack or V attack by contact with the exhaust gas flow is used for the exhaust valve.
  • materials having such high temperature corrosion resistance for example, Ni-based aging precipitation alloys such as Nimonic 80A and Inconel 718, and Co-based alloys such as Stellite are known (“Nimonic”, “Inconel”, and “Stelite” are , All are registered trademarks).
  • exhaust valves using high alloys such as Ni-based alloys and Co-based alloys are all expensive, exhaust valves provided with such high alloys only to areas requiring high-temperature corrosion resistance have also been proposed. .
  • Patent Document 1 as an exhaust valve for a large-sized diesel engine, a Co-based alloy is applied to the umbrella face face of a main body made of austenitic heat resistant steel, and a Ni-based alloy is applied to the umbrella exposed surface.
  • a combined exhaust valve is disclosed.
  • Both Co-based alloys and Ni-based alloys are excellent in high temperature corrosion resistance, but in particular, the former is excellent in wear resistance and the latter is excellent in thermal shock resistance.
  • Such a composite exhaust valve is provided by overlay welding with a material that is more suitable for the required properties of the umbrella face and umbrella contact surface respectively.
  • the present invention has been made in view of such circumstances, and an object of the present invention is to provide a method of manufacturing a highly durable large vessel engine exhaust valve capable of withstanding the high load of a large vessel diesel engine. It is.
  • the method for producing an engine exhaust valve for a large vessel is a method for producing an exhaust valve for a large vessel diesel engine, comprising a Ni-Cr-Al Ni-based aging precipitation alloy so as to cover the tip of a round bar steel material.
  • the welding material is piled up a plurality of times and welded in a pile, and then the fore-end is forged into a hot shape to form the umbrella while giving structure adjustment of the welded portion, and subjected to solution heat treatment and aging precipitation heat treatment It is characterized by
  • the lamellar structure of the ⁇ -Cr phase and the ⁇ 'phase formed in the lining weld formed by overlaying welding several times is prepared by forging and the ⁇ -Cr phase is finely grained It is possible to suppress abnormal growth of the ⁇ 'phase when using the engine. Therefore, it is possible to suppress the occurrence of cracking in the welded portion and manufacture an exhaust valve for a large-sized ship engine having excellent durability.
  • the Ni-Cr-Al Ni-based aged precipitation alloy contains, by mass%, Cr: 32 to 50%, Al: 0.5 to 10.0%, and Fe: 0.1 as essential additive elements. It may be characterized in that it contains up to 20.0%, and the balance is inevitable impurities and Ni. According to this invention, high temperature corrosion resistance such as S attack resistance and V attack resistance can be enhanced, and an exhaust valve of a large ship engine excellent in durability can be manufactured.
  • the Ni-Cr-Al Ni-based aged precipitation alloy contains, by mass%, Cr: 32 to 50%, Al: 0.5 to 10.0%, and Fe: 0.1 as essential additive elements. While containing ⁇ 20.0%, Si: 5% or less, B: 0.01% or less, C: 0.1% or less, Cu: 5% or less, Ti: 0.1% as an optional additive element In the following, it may be characterized by containing Nb: 0.1% or less, Ta: 0.1% or less, V: 0.1% or less, and Ti + Nb + Ta + V: 0.1% or less. According to this invention, it is possible to manufacture an exhaust valve for a large marine engine which has better high temperature corrosion resistance and is excellent in durability.
  • the overlay welding may be characterized in that a softening heat treatment is applied between a plurality of applications.
  • a softening heat treatment is applied between a plurality of applications.
  • the welding material may be an alloy wire for overlay welding.
  • FIG. 5 is a cross-sectional view of an exhaust valve obtained by the manufacturing method according to the present invention. It is process drawing which shows the manufacturing method by this invention. It is a side view of the exhaust valve in a manufacturing process. It is sectional drawing of the exhaust valve in a forge process. It is a figure which shows the component composition of a steel ingot. It is a figure which shows the component composition and manufacturing condition of an exhaust valve. It is a figure which shows the result of S attack resistance test and V attack resistance test. It is a drawing showing the photograph which shows section organization. It is a drawing showing the photograph which shows section organization.
  • the inventor of the present invention has applied a Ni-Cr-Al alloy which is excellent in high temperature strength and has high V attack resistance and S attack resistance by overlay welding so as to cover a predetermined portion of a large ship engine exhaust valve.
  • overlay welding is repeated several times to obtain the thickness.
  • cracks were generated in the weld overlay, and it was found that the cause was abnormal growth of fine particles of the ⁇ 'phase which is an intermetallic compound responsible for high temperature strength.
  • the inventor found that it is possible to suppress abnormal growth of fine particles of the ⁇ 'phase by performing forge processing of the lamellar structure to perform structure adjustment, that is, structure adjustment in which the ⁇ -Cr phase is made into fine particles. .
  • structure adjustment that is, structure adjustment in which the ⁇ -Cr phase is made into fine particles.
  • the exhaust valve 1 is composed of a shaft 2 made of austenitic heat resistant steel and an umbrella 3 at its tip.
  • the umbrella portion 3 includes a surface layer lining portion 4 made of a Ni-Cr-Al alloy given by multilayer build-up welding.
  • the surface layer lining portion 4 has a structure in which fine particles 14 of the ⁇ 'phase (Ni 3 Al) and fine particles 15 of the ⁇ -Cr phase are uniformly dispersed in a matrix 13 consisting of a ⁇ phase (Ni solid solution). Have. This will be described later along with FIGS. 8 and 9.
  • the exhaust valve 1 provided with the surface layer lining portion 4 is provided with high S attack resistance and V attack resistance by the Ni-Cr-Al alloy, and is maintained at a high temperature for a long time when using the engine.
  • the coarse particles 15 of the -Cr phase can suppress the coarsening of the fine particles 14 of the ⁇ 'phase, and the generation of cracks in the surface layer lining portion 4 can be suppressed. That is, the durability of the large marine vessel engine as an engine exhaust valve can be greatly enhanced.
  • the stepped round rod 1 ′ has a round rod-like shaft 2, a connecting portion 2a whose diameter is continuously increased from the shaft 2, and a diameter larger than that of the shaft 2. It is a rod-like body which consists of processing part 3a which has. The surface of the front end portion of the processed portion 3a is ground to give a buildup weld portion 3b.
  • the grinding process is a surface process for enhancing the adhesion of buildup welding in buildup welding step S2 described later.
  • a Ni-Cr-Al based alloy is melted, and for example, while preparing an alloy powder for buildup welding powderized by gas atomization method or the like, as shown in FIG. 3 (b)
  • the alloy powder is overlay-welded on the surface of the weld overlay 3b. That is, build-up welding is performed multiple times so as to give an alloy layer of a predetermined thickness required as an exhaust valve of a large ship engine, and a build-up welded portion 4 'is provided.
  • the surface of the weld build-up welded portion 3b is entirely covered with a Ni-Cr-Al based alloy which is considered to have high S attack resistance and V attack resistance.
  • a welding material used for overlay welding an alloy wire for overlay welding, an alloy rod for overlay welding, or an alloy for overlay welding consisting of a Ni-Cr-Al based alloy instead of the alloy powder for overlay welding. A band may be used.
  • This softening heat treatment is, for example, a heat treatment in which the weld overlay weld 4 'is heated to about 850 ° C., and held for 16 hours for air cooling.
  • This softening heat treatment is, for example, a heat treatment in which the weld overlay weld 4 'is heated to about 850 ° C., and held for 16 hours for air cooling.
  • the ⁇ -Cr phase in particular, the lamellar structure of the ⁇ -Cr phase and the ⁇ ′ phase formed by the above-described multiple build-up welding operations is spheroidized. That is, the welded portion can be softened to reduce the forging resistance in the subsequent forging step S3.
  • the stepped round bar 1 'to which the weld overlay 4' is applied is cast forged by the forging die 9 and the anvil 10, and the umbrella portion 3 (See FIG. 1).
  • the forging die 9 which has the processing surface 9a corresponding to the curved surface which should give the face surface of the umbrella part 3 (refer FIG. 1) is prepared. Insert the shaft 2 of the stepped round rod 1 'into the central through hole 9b of the forging die 9 from the side of the working surface 9a, and push it until at least a part of the connecting portion 2a abuts on the working surface 9a of the forging die 9. . This is held by the holder 12 at two places separated along the shaft 2.
  • the end portion of the weld overlay 4 ' is brought into contact with the anvil 10, and the anvil 10 is made to approach the forging die 9 along the axis of the stepped round bar 1' to perform mold insert forging.
  • the connecting portion 2a, the processed portion 3a, and the weld buildup portion 4 ' can be forged into a substantially conical shape, and the umbrella portion 3 including the surface layer lining portion 4 as shown in FIG. Can be obtained.
  • the forging step S3 not only gives the formation of the umbrella portion 3 (see FIG. 1), but also causes the layered body of the ⁇ -Cr phase in the lamellar structure of the weld overlay 4 ′ to be made into fine particles It is also a step of adjustment. From this point of view, for example, in a 57Ni-38Cr-3.8Al-based alloy described later, forging is performed in a temperature range of 1000 to 1100 ° C., preferably in a temperature range of 1060 ° C. to 1100 ° C.
  • the processing distortion due to forging is removed, and the precipitates such as carbides and intermetallic compounds in the entire area of the valve material and the surface layer lining portion 4 are heated to a high temperature so as to form solid solution in the ⁇ phase.
  • Perform heat treatment to hold For example, after heating to 1050 ° C. and holding for 1 hour, water cooling is performed.
  • the ⁇ -Cr phase finely pulverized in the forging step S3 can be further spheroidized.
  • aging treatment is performed, for example, by holding for 24 hours at 700 to 800 ° C. and air cooling so that the ⁇ ′ phase is precipitated in the matrix, for the solution treated valve material. That is, the processing temperature and time can be appropriately adjusted depending on the component composition of the Ni-Cr-Al based alloy and the like.
  • the exhaust valve 1 obtained through the above steps includes fine particles 14 of ⁇ ′ phase (Ni 3 Al) and ⁇ -Cr phase in a matrix 13 composed of ⁇ phase (Ni solid solution) as shown in FIG.
  • the umbrella portion 3 has the surface layer lining portion 4 obtained from the structure in which the fine particles 15 are uniformly dispersed. That is, in addition to the high S attack resistance and the V attack resistance provided by the Ni-Cr-Al alloy, the ⁇ -Cr phase fine particles 15 have the ⁇ 'phase (even if the engine is used at high temperature. The coarsening of the fine particles 14 of Ni 3 Al) is suppressed. Therefore, a reduction in mechanical strength can be suppressed, and durability as a large ship engine exhaust valve can be enhanced.
  • the stepped round bar 1 ' is processed in the round bar processing step S1.
  • the round bar may be used.
  • the forging step S3 mold forging as described above is good.
  • a step of machining the stepped round bar may be provided between these steps.
  • FIG. 5 shows the component composition of the sample collected from the ladle during melting and refining.
  • the shaft portion 2 with a diameter of 100 mm, the processed portion 3a with a diameter of 213 mm, and the welded portion 3b with a diameter of 183 mm were processed by rough forging to obtain a stepped round bar 1 '.
  • the alloy powder for overlay welding was obtained by melting and pulverizing 57Ni-38Cr-3.8Al-based alloy having the component composition corresponding to Examples 1 to 9 shown in FIG. 6 and alloys similar thereto by a gas atomizing method.
  • the alloy wire for overlay welding is prepared by melting and rolling a 57Ni-38Cr-3.8Al-based alloy having a component composition corresponding to Examples 10 to 18 shown in FIG. It was obtained by drawing into a 6 mm linear body.
  • An alloy powder for overlay welding by plasma arc welding or an alloy wire for overlay welding by TIG (Tungsten Inert Gas) welding is applied to the surface of the weld overlay 3b of the stepped round rod 1 'by plasma arc welding.
  • Overlay welding was performed to a thickness of about 15 mm. That is, five build-up welds were repeated and constructed with a thickness of 3 mm at one time.
  • a softening heat treatment was performed by heating to 850 ° C. and holding for 16 hours for air cooling. Then, it machined so that the thickness of build-up welding part 4 'might remain about 8 mm.
  • the stepped round bar 1 ′ was heated to 1050 ° C. and held for a predetermined time, and then forged into a hot mold to obtain a valve material.
  • a solution treatment was performed by heating to 1050 ° C., holding for 1 hour, and water cooling.
  • valve material was heated to the aging treatment temperature shown in FIG. 6, respectively, and was subjected to an aging treatment of holding for 24 hours and air cooling.
  • the exhaust valve 1 of Examples 1 to 18 is obtained.
  • the conventional material Nimonic 80A material and Inconel 718 material are respectively processed into the same shape as the exhaust valve 1 without the above-described overlay welding.
  • the S attack resistance test and the V attack resistance test were performed in accordance with JIS Z 2292. Specifically, in the S attack resistance test, 90% Na 2 O 4 + 10% NaCl was applied at a coating amount of 20 mg / cm 2 to the above-described corrosion resistance test piece which was weighed in advance, and maintained at 800 ° C. for 20 hours It was carried out by measuring the weight after removing the scale formed. That is, the S attack resistance was evaluated by the corrosion loss before and after the test. Moreover, anti-V attack resistance test by changing the liquid to be applied to the 85% V 2 O 5 + 15 % Na 2 O 4, were evaluated by in resistance to S-attacking property test the same method.
  • the room temperature tensile test and the high temperature tensile test measured tensile strength and 0.2% proof stress with a commercially available tensile testing apparatus.
  • the high temperature tensile test was conducted at temperatures of 500 ° C. and 650 ° C.
  • any of the test pieces of Examples 1 to 18 had lower corrosion loss as compared with the test pieces of Comparative Examples 1 and 2 which are the conventional materials. Furthermore, in the S attack resistance test, any of the test pieces of Examples 1 to 18 also exhibited low corrosion loss as compared with the test pieces of Comparative Examples 1 and 2. That is, a build-up welded portion made of the alloy powder for build-up welding or the alloy wire for build-up welding shown in FIG. 6 is superior in V attack resistance and S attack resistance to conventional materials.
  • composition range of the alloy powder for overlay welding and the alloy wire for overlay welding shown in the component composition of FIG. It is determined in First, the essential additive elements Cr, Al and Fe will be described.
  • Cr tends to form an ⁇ -Cr phase as described above and to increase the hardness.
  • high temperature corrosion resistance such as V attack resistance and S attack resistance can be enhanced within a certain addition range.
  • Cr is, in mass%, in the range of 32 to 50%, preferably in the range of 35 to 45%.
  • Al can form a? 'Phase to enhance high-temperature mechanical strength, and can also improve high-temperature corrosion resistance within a certain range. On the other hand, excessive formation of the ⁇ 'phase causes embrittlement. Taking these into consideration, Al is in the range of 0.5 to 10.0% by mass, preferably in the range of 3.4 to 5.0%.
  • Fe is added for the purpose of reducing the material cost because it is less expensive than Ni. On the other hand, when the addition amount of Fe is too large, the high temperature corrosion resistance is lowered. Therefore, in mass%, Fe is in the range of 0.1 to 20.0%, preferably in the range of 0.5 to 5%.
  • Si, B, C, Cu, Ti, Nb, Ta, V which are optional additive elements will be described.
  • Si like Al, forms particulate intermetallic compounds that affect high temperature mechanical strength, and tends to improve high temperature corrosion resistance. From the viewpoint of embrittlement due to excessive formation of intermetallic compound particles, Si is at most 5% by mass, preferably at most 3.5% by mass.
  • B affects the mechanical strength of grain boundaries.
  • B is 0.01% or less, preferably 0.005% or less by mass.
  • C affects high temperature corrosion resistance.
  • C is 0.1% or less by mass%.
  • Cu dissolves in the ⁇ phase to affect the mechanical strength.
  • Cu is at most 5%, preferably at most 1%, by mass.
  • Ti, Nb, Ta, and V combine with C to form carbides and affect mechanical strength, and also affect high-temperature corrosion resistance.
  • Ti 0.1% or less
  • Nb 0.1% or less
  • Ta 0.1% or less
  • V 0.1% or less
  • Ti + Nb + Ta + V 0.1% or less in mass%. It is preferable to do.
  • Reference Signs List 1 exhaust valve 2 shaft 2a connection 3 umbrella 4 surface lining 4 'overlay welding 13 matrix 14 ⁇ ' phase (Ni 3 Al) fine particles 15 ⁇ -Cr phase fine particles

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Plasma & Fusion (AREA)
  • Heat Treatment Of Articles (AREA)

Abstract

Ce procédé de fabrication d'une soupape d'échappement de moteur pour gros navire est caractérisés en ce que, après plusieurs réitérations de soudure à superposition (S2) au moyen d'un matériau de soudure comprenant un alliage durci par vieillissement à base de NI et du système Ni-Cr-Al de manière à recouvrir l'extrémité distale d'une barre ronde d'un matériau en acier, l'extrémité distale de ladite barre est soumise au forgeage par matriçage à chaud de façon à former une partie tête tout en conférant des ajustements de texture à la soudure (S3), et est soumise à un traitement thermique par mise en solution (S4) et à un traitement thermique de durcissement par vieillissement (S5). Ce procédé de fabrication permet de produire une soupape d'échappement de moteur pour gros navire de haute durabilité de manière qu'elle puisse soutenir les lourdes charges rencontrées dans un moteur diesel de gros navire. Le matériau de soudure peut être un fil d'alliage destiné à être utilisé dans la soudure à superposition.
PCT/JP2013/069558 2012-07-20 2013-07-18 Procédé de fabrication d'une soupape d'échappement de moteur pour gros navire WO2014014069A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2012-161610 2012-07-20
JP2012161610A JP6011098B2 (ja) 2011-07-25 2012-07-20 大型船舶用エンジン排気バルブの製造方法

Publications (1)

Publication Number Publication Date
WO2014014069A1 true WO2014014069A1 (fr) 2014-01-23

Family

ID=49950105

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2013/069558 WO2014014069A1 (fr) 2012-07-20 2013-07-18 Procédé de fabrication d'une soupape d'échappement de moteur pour gros navire

Country Status (1)

Country Link
WO (1) WO2014014069A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104853823A (zh) * 2014-08-27 2015-08-19 日锻汽门株式会社 提升阀以及其制造方法
CN108368809A (zh) * 2015-12-04 2018-08-03 臼井国际产业株式会社 具有连接头部的高压燃料喷射管及其头部成型方法
CN110242381A (zh) * 2017-05-24 2019-09-17 崔旺林 一种汽车发动机用进气门的制造方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59225845A (ja) * 1983-06-06 1984-12-18 Hitachi Zosen Corp 内燃機関用排気弁の製造方法
JPH0639545A (ja) * 1992-04-13 1994-02-15 Ishikawajima Harima Heavy Ind Co Ltd 炭素鋼材等の溶接方法
JPH1122427A (ja) * 1997-07-03 1999-01-26 Daido Steel Co Ltd ディーゼルエンジンバルブの製造方法
JPH1119790A (ja) * 1997-04-14 1999-01-26 General Electric Co <Ge> 溶接補修方法並びに該方法で補修された物品
JP2000328163A (ja) * 1999-05-21 2000-11-28 Daido Steel Co Ltd ディーゼルエンジン用排気バルブ合金及び排気バルブの製造方法
JP2011162803A (ja) * 2010-02-04 2011-08-25 Daido Steel Co Ltd 耐摩耗性及び耐高温腐食性に優れた肉盛溶射用粉末合金

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59225845A (ja) * 1983-06-06 1984-12-18 Hitachi Zosen Corp 内燃機関用排気弁の製造方法
JPH0639545A (ja) * 1992-04-13 1994-02-15 Ishikawajima Harima Heavy Ind Co Ltd 炭素鋼材等の溶接方法
JPH1119790A (ja) * 1997-04-14 1999-01-26 General Electric Co <Ge> 溶接補修方法並びに該方法で補修された物品
JPH1122427A (ja) * 1997-07-03 1999-01-26 Daido Steel Co Ltd ディーゼルエンジンバルブの製造方法
JP2000328163A (ja) * 1999-05-21 2000-11-28 Daido Steel Co Ltd ディーゼルエンジン用排気バルブ合金及び排気バルブの製造方法
JP2011162803A (ja) * 2010-02-04 2011-08-25 Daido Steel Co Ltd 耐摩耗性及び耐高温腐食性に優れた肉盛溶射用粉末合金

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104853823A (zh) * 2014-08-27 2015-08-19 日锻汽门株式会社 提升阀以及其制造方法
CN104853823B (zh) * 2014-08-27 2016-05-25 日锻汽门株式会社 提升阀的制造方法
US10473002B2 (en) 2014-08-27 2019-11-12 Nittan Valve Co., Ltd. Poppet valve and method for manufacturing same
CN108368809A (zh) * 2015-12-04 2018-08-03 臼井国际产业株式会社 具有连接头部的高压燃料喷射管及其头部成型方法
EP3385532A4 (fr) * 2015-12-04 2019-08-14 Usui Co., Ltd. Tuyau d'injection de carburant haute pression pourvu d'une partie tête de raccordement et procédé de moulage de partie tête de raccordement
CN110242381A (zh) * 2017-05-24 2019-09-17 崔旺林 一种汽车发动机用进气门的制造方法
CN110242381B (zh) * 2017-05-24 2021-09-24 抚州振邦汽车服务有限公司 一种汽车发动机用进气门的制造方法

Similar Documents

Publication Publication Date Title
JP6011098B2 (ja) 大型船舶用エンジン排気バルブの製造方法
KR101562914B1 (ko) 내부 연소 엔진의 배기 밸브용 배기 밸브 스핀들
EP2781612B1 (fr) Tube en alliage résistant à la chaleur en austénite sans soudure
JP5147037B2 (ja) ガスタービン燃焼器用Ｎｉ基耐熱合金
JP5742447B2 (ja) 高硬度肉盛合金粉末
KR101809360B1 (ko) Ni기 내열합금 용접 조인트의 제조 방법 및 그것을 이용하여 얻어지는 용접 조인트
EP2677053B1 (fr) Alliage à base de Ni pour matériau de soudage et fil de soudage, tige et poudre
KR101563533B1 (ko) 내고온 부식 특성을 구비한 Ni-Cr-Co계 합금과 그것을 사용해서 표면 개질된 포핏밸브
WO2016052423A1 (fr) SURCHAUFFE Ni À BASE D&#39;UN ALLIAGE RÉFRACTAIRE.
CA2491754C (fr) Alliages a base de cobalt resistant a l&#39;usure et a la corrosion
WO2014126086A1 (fr) Poudre métallique, outil pour corroyage et procédé pour la fabrication d&#39;outil pour corroyage
KR102062031B1 (ko) 대형 선박용 엔진 배기 밸브 및 그 제조 방법
CN104511702A (zh) 用于焊接超级合金的焊接材料
WO2014014069A1 (fr) Procédé de fabrication d&#39;une soupape d&#39;échappement de moteur pour gros navire
US20040011435A1 (en) Wear-resistant, corrosion-resistant cobalt-based alloys
JP2014169631A (ja) ディーゼルエンジン排気バルブの製造方法
EP3048178B1 (fr) Soupape d&#39;échappement de moteur pour gros navire et son procédé de fabrication
US11732331B2 (en) Ni-based alloy, and Ni-based alloy product and methods for producing the same
EP4159360A1 (fr) Produit d&#39;alliage à base de cobalt et procédé de production d&#39;un produit d&#39;alliage à base de cobalt
JPH0617528B2 (ja) 排気弁および排気弁座のシ−ト部用合金
JP2017024051A (ja) 肉盛溶接用材料及び肉盛金属

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 13820485

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 13820485

Country of ref document: EP

Kind code of ref document: A1