WO2015147272A1 - Tige de soupape d'échappement pour moteur à combustion interne, et procédé de fabrication de celle-ci - Google Patents

Tige de soupape d'échappement pour moteur à combustion interne, et procédé de fabrication de celle-ci Download PDF

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Publication number
WO2015147272A1
WO2015147272A1 PCT/JP2015/059658 JP2015059658W WO2015147272A1 WO 2015147272 A1 WO2015147272 A1 WO 2015147272A1 JP 2015059658 W JP2015059658 W JP 2015059658W WO 2015147272 A1 WO2015147272 A1 WO 2015147272A1
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Prior art keywords
exhaust valve
valve rod
resistant
temperature corrosion
contact surface
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PCT/JP2015/059658
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English (en)
Japanese (ja)
Inventor
栄治 飛田
誠彦 大塚
徳一 玉田
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旭化成ケミカルズ株式会社
株式会社コカブ
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Application filed by 旭化成ケミカルズ株式会社, 株式会社コカブ filed Critical 旭化成ケミカルズ株式会社
Priority to CN201580014580.2A priority Critical patent/CN106103920B/zh
Priority to JP2016510555A priority patent/JP6132974B2/ja
Priority to KR1020167025423A priority patent/KR101821082B1/ko
Publication of WO2015147272A1 publication Critical patent/WO2015147272A1/fr

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    • 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
    • B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/06—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating by means of high energy impulses, e.g. magnetic energy
    • B23K20/08—Explosive welding
    • 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
    • C22C19/051—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W
    • C22C19/056—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W with the maximum Cr content being at least 10% but less than 20%
    • 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
    • C22C27/00—Alloys based on rhenium or a refractory metal not mentioned in groups C22C14/00 or C22C16/00
    • C22C27/06—Alloys based on chromium
    • 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
    • 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
    • C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
    • 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
    • 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
    • F01L2303/01—Tools for producing, mounting or adjusting, e.g. some part of the distribution
    • 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 an exhaust valve rod of an internal combustion engine such as various diesel engines of a ship and a manufacturing method thereof.
  • martensitic heat-resistant steels SUH1, 3, 4 or austenitic heat-resistant steels SUH31, 37, SNCrW are used as exhaust valve rods for various diesel engines and gasoline engines of ships.
  • Coal stellite or Ni-based metal plating such as colmonoy is used on the sheet surface.
  • Exhaust valve rods are the most important and expensive parts in diesel engines and gasoline engines, and the weight of the exhaust valve rods in the shipowner's economy is quite large. Thus, attempts have been made to extend the life of the exhaust valve rod so far.
  • the seat surface was healthy and without any indentation even after 16,000 hours, and the exhaust valve stem was used for the seat surface. If the high-temperature strength is higher than a certain value, it was considered that the maintenance time and the life of the valve can be made longer than the current situation.
  • Patent Document 1 Japanese Patent Laid-Open No. Hei 5-222475
  • this valve material is superior in heat resistance and corrosion resistance to the metal material described above, has a long service life, and is currently stable in quality in large diesel engines.
  • Patent Document 2 Japanese Patent Application Laid-Open No. 2004-285863
  • a Ni-based precipitation hardening super heat-resistant alloy (Nymonic 80A) is joined to the outer surface (sheet) of the exhaust valve rod by explosive pressure bonding. Is disclosed.
  • the metal of the exhaust valve seat is a material that can obtain high hardness at high temperatures
  • the metal on the flaming surface side is in a high-temperature high-pressure corrosive atmosphere
  • Exhaust valve base metal that is based on metallic Fe is an intermetallic compound in the precipitated eutectic of the metals that constitute 1) and 2). If it is, it is not good to form a brittle compound if it is Fe-based, so the edge must be cut with Ni.
  • the present inventor is an exhaust valve rod of a diesel engine or the like, and is made of heat-resistant steel of valve material including SUH1, 3, 4, SUH31, Nimonic 80, 81, which is generally used as a base material of the exhaust valve rod.
  • In-conel Inconel (registered trademark) the same applies hereinafter) that does not contain a P (phosphorus) component on the flaming surface is overlay welded, and Ni40 is deposited on the top surface of the overlay weld.
  • the inventors of the present application have conducted intensive studies and experiments. As a result, the conventional overlay welding is partially replaced, and a high temperature corrosion resistant alloy is joined and integrated to the contact surface by explosive pressure bonding. As a result, the present inventors have found that such a problem can be solved, and have completed the present invention. That is, the present invention is as follows.
  • An exhaust valve rod for an internal combustion engine using heat-resistant steel as a base material wherein a first high-temperature corrosion-resistant alloy containing Ni and Cr is formed on a contact surface made of the base material of the exhaust valve rod.
  • the exhaust gas, wherein the plate is crimped, exhibits a wavy joining interface, and a second high-temperature corrosion-resistant alloy containing Ni and Cr is welded at the center of the flaming surface Valve stem.
  • the first high-temperature corrosion-resistant alloy containing Ni and Cr is a super-alloy resistant high-temperature corrosion-resistant Ni-based metal mainly composed of Ni 40 to 60% and Cr 60 to 30% [1] Or the exhaust valve rod as described in [2].
  • the heat-resistant steel as the base material is martensitic heat-resistant steels SUH1, SUH3, and SUH4, austenitic heat-resistant steels SUH31, SUH37, SNCrW-based steel, and Ni-based heat-resistant steel Nimonic 80A (registered)
  • a first heat resistance containing Ni and Cr is formed on a contact surface made of a base material of the exhaust valve rod through a stainless steel plate material for heat-resistant stainless steel selected from the group consisting of SUS309, SUS310, and SUS316.
  • the exhaust valve rod according to any one of [1] to [5], wherein a plate of a high temperature corrosion resistant alloy is pressure-bonded.
  • the plate material of the first high-temperature corrosion-resistant alloy containing Ni and Cr is placed on the contact surface of the exhaust valve rod at a predetermined interval, and an explosive is attached to the plate material and subjected to explosive pressure bonding.
  • Step of integrally joining to the contact surface of the exhaust valve rod, and removing the non-bonded portion of the explosion contact pressure surface of the obtained exhaust valve rod, and the second high temperature corrosion resistance containing Ni and Cr A step of depositing a conductive alloy, The method for manufacturing an exhaust valve rod according to any one of the above [1] to [6].
  • a high-temperature corrosion-resistant metal plate material of a superalloy, high-temperature corrosion-resistant Ni-based metal is used as a base material for a contact surface of an exhaust valve rod using heat-resistant steel of an internal combustion engine.
  • An exhaust valve rod for an internal combustion engine which is formed by depositing a superalloy high-temperature corrosion-resistant metal by removing an explosion-bonded non-bonded portion at the center of the flaming surface.
  • Another embodiment of the present invention is an internal combustion engine using a heat resistant steel of a valve material containing any of SUH1, 3, 4, SUH31, Nimonic 80, 81 (Nimonic (registered trademark)) as a base material of an exhaust valve rod.
  • An exhaust valve rod for an internal combustion engine characterized in that they are integrally joined by overlapping with a predetermined interval and explosion-crimping.
  • a high temperature corrosion resistance of a Ni-base metal of a superalloy of 3 to 12 mm thickness is used as a base material of a contact surface of an exhaust valve rod using heat resistant steel of an internal combustion engine.
  • Metal plate materials are stacked at a predetermined interval, a 5-10 mm diameter detonator is provided at the center, and explosion-crimped, and a superalloy high-temperature corrosion-resistant Ni made of superalloy is used as the base material for the contact surface of the exhaust valve rod.
  • a stainless steel metal plate material for heat-resistant stainless steel containing any one of SUS309, 310, and 316 as a base material for a contact surface of an exhaust valve rod using heat-resistant steel of an internal combustion engine, and Ni40 to An exhaust of an internal combustion engine characterized by superposing a high-temperature corrosion-resistant Ni-based metal plate material of a superalloy mainly composed of 60% and Cr of 60 to 30% and bonding them together by explosion bonding. It is a valve stem.
  • a high temperature corrosion resistant Ni-based high temperature corrosion resistant metal plate material of a superalloy is explosively bonded to a base material of a contact surface of an exhaust valve rod using heat resistant steel of an internal combustion engine. And an exhaust valve rod manufacturing method for an internal combustion engine.
  • Another embodiment of the present invention is an internal combustion engine using a heat resistant steel of a valve material containing any of SUH1, 3, 4, SUH31, Nimonic 80, 81 (Nimonic (registered trademark)) as a base material of an exhaust valve rod.
  • Exhaust valve rod of the above-described exhaust valve rod, and a high temperature corrosion resistance Ni-based metal of a superalloy of a superalloy mainly composed of Ni 40 to 60% and Cr 60 to 30% on the contact surface of the exhaust valve rod Is a method of manufacturing an exhaust valve rod for an internal combustion engine, which is superposed at a predetermined interval and joined together by explosion pressure bonding.
  • a superalloy high-temperature corrosion-resistant metal plate material is superposed on a contact surface of an exhaust valve rod at a predetermined interval, and an explosive is applied to the superalloy high-temperature corrosion-resistant metal plate material. It is attached and explosively crimped, and it is integrally joined to the contact surface of the exhaust valve stem, and the explosive crimp non-bonded part of the exhaust surface of the exhaust valve rod is removed to build up the superalloy high-temperature corrosion-resistant metal.
  • a stainless steel metal plate material for heat-resistant stainless steel containing any one of SUS309, 310, and 316 as a base material for a contact surface of an exhaust valve rod using heat-resistant steel of an internal combustion engine, and Ni40 to Production of an exhaust valve rod for an internal combustion engine characterized by explosive pressure bonding of a high-temperature corrosion-resistant Ni-based metal plate material of a superalloy mainly composed of 60% and Cr 60-30% and integrally joining them.
  • An exhaust valve rod according to the present invention is an exhaust valve rod for an internal combustion engine that uses heat-resistant steel as a base material, and a contact surface made of the base material of the exhaust valve rod includes Ni and Cr.
  • the high-temperature corrosion-resistant alloy plate is crimped and has a wavy joining interface, and a second high-temperature corrosion-resistant alloy containing Ni and Cr is overlay welded at the center of the contact surface. . Due to the presence of the wavy bonding interface, the bonding between the base material and the first high-temperature corrosion-resistant alloy containing Ni and Cr is strong and uniform. According to the explosive bonding process, the bonding can be performed instantaneously.
  • the present invention provides a method of overlay welding that takes time and labor on the entire contact surface of the exhaust valve rod of an internal combustion engine, and the exhaust obtained by the method. Compared with valve stem, it can prevent thermal stress distortion and cracking due to high temperature, good surface roughness, easy machine finish, shorten production time, improve quality and reduce price Can do.
  • the high temperature corrosion resistance metal plate material of the superalloy high temperature corrosion resistance Ni-based metal is used as the base material of the contact surface of the exhaust valve rod using the heat resistant steel of the internal combustion engine.
  • the high pressure corrosion resistance of the superalloy is instantaneously applied to the contact surface of the exhaust valve rod by performing explosive pressure bonding using the required explosive pressure bonding method.
  • the high-temperature corrosion-resistant metal plate material of the Ni-based metal can be integrally joined, and the joining surface can be firmly joined in a wave shape and can be used with good corrosion resistance.
  • an exhaust valve in which a super alloy high temperature corrosion resistance Ni-based high temperature corrosion resistance metal plate material is integrally joined to a base material of a contact surface of an exhaust valve rod.
  • the explosive explosion non-crimped part at the center of the contact surface of the rod is removed and the superalloy high-temperature corrosion-resistant metal is formed by overlay welding, so that the explosion of the explosive does not affect the contact surface of the exhaust valve rod. Even if a crimped part occurs, the explosion-proof non-bonded part on the contact surface of the exhaust valve rod is removed, and the high-temperature corrosion-resistant metal of the superalloy is built up and firmly finished over the entire surface of the contact surface.
  • weld overlay is not performed over the entire contact surface of the valve stem, it is possible to minimize weld overlay that is time-consuming and time consuming as in the past, and thermal stress distortion and cracking due to high temperatures occur. Can be prevented, the surface roughness is good, the machine finish is simple, the production time can be shortened, And it can be improved, the price can also be reduced.
  • the heat resistant steel of the valve material including any of SUH1, 3, 4, SUH31, Nimonic 80, 81 (Nimonic (registered trademark)) is used as the base material of the exhaust valve rod.
  • Valves such as SUH1, 3, 4, 37, Nimonic 80, 81, etc., which are generally used as the base material of the exhaust valve rod, are obtained by stacking plate materials at a predetermined interval and integrally bonding them by explosive pressure bonding.
  • heat-resistant steel as a material, combined with Ni-base metal of superalloy excellent in high temperature corrosion resistance of sulfur attack and vanadium attack, it has durability with excellent high temperature-corrosion resistance.
  • Low speed fuel It can be expected to maintain the long life of exhaust valve rods of diesel engines, etc., greatly extend the maintenance interval, contribute to the reduction of customer expenses, and shorten the manufacturing time as described above. The price can be reduced.
  • the high temperature corrosion resistance Ni-base metal of a superalloy of 3 to 12 mm thickness is used for the base material of the contact surface of the exhaust valve rod using the heat resistant steel of the internal combustion engine.
  • High-temperature corrosion-resistant metal plate materials are stacked at predetermined intervals, a 5-10 mm diameter detonator is placed at the center, and explosion-crimped, and the super-alloy high-temperature corrosion-resistant resistance is applied to the base material of the contact surface of the exhaust valve rod.
  • High temperature corrosion resistance of superalloys by removing the 5-30 mm diameter explosive crimping non-crimped part at the center of the contact surface of the exhaust valve rod integrally bonded with high temperature corrosion resistant metal plate material made of a highly functional Ni-base metal
  • a porous metal By depositing a porous metal, it is possible to use a 3 to 12 mm thick material that is 3 mm or more thicker than the conventional welded and welded joint. Even if there is a non-crimped part in the center of the flaming face of the exhaust valve rod, 5 to 30 mm
  • the high temperature corrosion resistant metal of the superalloy is overlaid and welded over the entire surface of the flaming surface and welded over the entire surface of the exhaust valve rod. Since it is not performed, it can be used with good corrosion resistance, the manufacturing time can be shortened as described above, the quality can be improved, and the price can be reduced.
  • the stainless steel heat-resistant steel metal plate material including any one of SUS309, 310, and 316 as the base material of the contact surface of the exhaust valve rod using the heat-resistant steel of the internal combustion engine,
  • the exhaust valve rod A stainless steel plate material for heat-resisting stainless steel such as SUS309, 310, 316, etc., and a superalloy composed mainly of Ni 40-60%, Cr 60-30%, and high temperature corrosion resistance Ni-based metal plate material on the flaming surface
  • it can be used for repairing a damaged flaming surface due to the use of an exhaust valve rod, can be repaired in a shorter period of time than conventional, and can be reused with good corrosion resistance.
  • the contact surface of the exhaust valve rod joined by explosion pressure bonding as described above is heat-treated to perform the required mechanical finish, and the explosion pressure contact surface has excellent corrosion resistance and excellent strength.
  • the exhaust valve rod of the internal combustion engine can be made to have a long service life. It is possible to prevent the occurrence of distortion and cracking due to thermal stress due to high temperature due to overlay welding, to shorten the manufacturing time as described above, to improve the quality, and to reduce the price.
  • the heat-resistant steel of the valve material containing any of SUH1, 3, 4, SUH31, Nimonic 80, 81 (Nimonic (registered trademark)) is used as the base material of the exhaust valve rod.
  • An exhaust valve rod manufacturing method for an internal combustion engine comprising: a high temperature corrosion resistance Ni-base metal of a superalloy mainly composed of Ni 40 to 60% and Cr 60 to 30% on the contact surface of the exhaust valve rod.
  • the base material of the exhaust valve rod is generally used as SUH1, 3, 4, 37, Nimonic 80, Uses heat resistant steel of valve material such as 81, combined with Ni-base metal of superalloy excellent in high temperature corrosion resistance of sulfur attack and vanadium attack, and has excellent durability in high temperature-corrosion resistance And crude heavy oil as fuel It can be expected to maintain the long life of exhaust valve rods of low-speed diesel engines, etc., and the maintenance interval can be greatly extended, which can contribute to the reduction of customer expenses and shorten the manufacturing time as described above Can improve the quality and reduce the price.
  • the superalloy high-temperature corrosion-resistant metal plate material is superposed at a predetermined interval on the contact surface of the exhaust valve rod, and the superalloy high-temperature corrosion-resistant metal plate material is superposed. Attach explosive and attach it to the contact surface of the exhaust valve rod, and integrally bond it to the contact surface of the exhaust valve rod. If the non-crimped part of the contact surface of the exhaust valve rod is generated by the explosion of the explosive, the explosion-proof non-crimped part of the contact surface of the exhaust valve rod is removed and the high temperature resistance of the superalloy is removed.
  • the corrosion-resistant metal is welded and welded over the entire surface of the flaming surface, the welded surface of the exhaust valve rod is not welded over the entire surface, so it can be used with good corrosion resistance. Manufacturing time can be shortened, quality can be improved, and price can be reduced.
  • the stainless steel heat-resistant steel metal plate material including any one of SUS309, 310, and 316 as the base material of the contact surface of the exhaust valve rod using the heat-resistant steel of the internal combustion engine
  • the explosive pressure bonding of high-temperature corrosion-resistant Ni-based metal plate materials of superalloys mainly composed of Ni 40 to 60% and Cr 60 to 30% and integrally bonding them together makes the contact surface of the exhaust valve rod SUS309, 310, 316 and other stainless steel heat-resistant steel metal plate materials and Ni-based metal plate materials with high-temperature corrosion resistance of superalloys mainly composed of Ni 40-60% and Cr 60-30% Can be firmly joined to each other and can be used with good corrosion resistance.
  • the contact surface of the exhaust valve rod joined by explosion pressure bonding as described above is heat-treated to perform the required mechanical finish, and the explosion pressure contact surface has excellent corrosion resistance and excellent strength.
  • the exhaust valve rod of the internal combustion engine can be made to have a long service life. It is possible to prevent the occurrence of distortion and cracking due to thermal stress due to high temperature due to overlay welding, to shorten the manufacturing time as described above, to improve the quality, and to reduce the price.
  • the side view of the exhaust valve rod of one Embodiment of this invention The schematic sectional side view which abbreviate
  • An exhaust valve rod according to the present invention is an exhaust valve rod for an internal combustion engine that uses heat-resistant steel as a base material, and a contact surface made of the base material of the exhaust valve rod includes Ni and Cr.
  • the high-temperature corrosion-resistant alloy plate is crimped and has a wavy joint interface, and the second high-temperature corrosion-resistant alloy containing Ni and Cr is overlay welded at the center of the contact surface. It is the said exhaust valve rod characterized by these.
  • An exhaust valve rod of an internal combustion engine is a super-alloy high-temperature corrosion-resistant Ni-based metal with a high-temperature corrosion-resistant metal plate as a base material of a contact surface of an exhaust valve rod using heat-resistant steel of the internal-combustion engine.
  • Superposed high temperature and corrosion resistant metal plate material of superalloy and high temperature corrosion resistance Ni base metal is integrally bonded to the base material of the exhaust valve rod contact surface. The explosive pressure-bonding non-crimped portion at the center of the contact surface of the exhaust valve rod is removed, and a superalloy high-temperature corrosion-resistant metal is deposited and deposited.
  • An exhaust valve rod 1 of an internal combustion engine such as a marine diesel engine is formed in a mushroom shape as shown in FIG. 1 and functions as a valve for exhaust gas exhaust of a piston cylinder.
  • Martensitic heat resistant steels SUH1, 3, 4 or austenitic heat resistant steels SUH31, 37, SNCrW, and Nimonic 80, 81 Any valve material can be used. These chemical components (%) are shown in Table 1.
  • Ni-based high-temperature corrosion-resistant metal plate materials 4 consisting mainly of Ni 40-60% and Cr 60-30% Sulfur attack and vanadium attack resistance are excellent in high temperature corrosion resistance and durability, and can maintain the long-term life of exhaust valve rods of low speed diesel engines that use crude heavy oil as fuel, greatly extending maintenance intervals It is possible.
  • the first high-temperature corrosion-resistant alloy containing Ni and Cr and the second high-temperature corrosion-resistant alloy containing Ni and Cr are each one of the following Ni-based high-temperature corrosion-resistant metal plate materials. Can be 1.
  • MC alloy is Cr: more than 43 to 50%, Mo: 0.1 to 2%, Mg: 0.001 to 0.05%, N: 0.00. 001 to 0.04%, Mn: 0.05 to 0.5%, the balance is made of Ni and inevitable impurities, and the amount of C contained as inevitable impurities is adjusted to 0.05% or less.
  • This is a Ni-base alloy having excellent corrosion resistance against an inorganic acid-containing supercritical water environment.
  • the MC alloy is approximately 45% Cr, 1% Mo, and the remaining Ni (about 54%).
  • Explosive pressure bonding is used to join a superalloy high-temperature corrosion-resistant metal plate material 4 to the contact surface 3 of the exhaust valve rod 1, for example, filling a sturdy box 5 as shown in FIG.
  • the valve stem body 2 of the exhaust valve stem 1 is embedded in the center of the sand 6 and a required gap is provided with a small protrusion between the exhaust valve stem 1 and the contact surface 3 as shown in FIG.
  • a superalloy high-temperature corrosion-resistant metal sheet material 4 of a superalloy of a sheet having a required thickness approximately the same as the size of the flaming surface 3 is superposed, and the surface of the superalloy high-temperature corrosion-resistant metal sheet material 4 is overlaid with ammonium nitrate.
  • the powdered explosive 7 containing the main component is uniformly arranged to the required thickness, and a 4-10 mm diameter detonator 8 is attached to the center, and the explosive 7 is detonated by the detonator 8 so as to be pressure bonded. ing.
  • the superalloy high-temperature corrosion-resistant metal plate material 4 is 1 to 16 mm thick with respect to the 100 to 600 mm diameter and 10 to 60 mm thickness of the flaming surface 3 of the exhaust valve rod 1. It can be used as an appropriate thickness corresponding to the size of the steel, and durability can be improved by using 3-16 mm or more of 3 mm or more compared with the conventional welding overlay welding, but 3 mm to 12 mm From the viewpoint of durability and explosive pressure bonding properties, a thickness of about 4 to 12 mm is more desirable.
  • Explosive pressure bonding is one of the metal joining methods that uses the high pressure of explosives, and is a technology that can particularly strongly bond dissimilar metals together. Explosive bonding is characterized by the fact that the bonding interface exhibits a wave shape and there is no process that affects the metal structure of the material, such as heating and rolling, so the strength of the bonding interface is high and the characteristics of the material can be utilized. Further, since the metal material can be joined with almost no heat applied, even a combination of metals that cannot be joined by a normal method can be firmly joined.
  • the metal bonding interface bonded by explosive pressure bonding has a unique wavy shape as a mechanism for strong bonding, and is said to be due to the fact that the bonding area is larger than the straight bonding interface. ing.
  • the size of the wavy interface increases, plastic deformation and thermal influence during bonding increase, leading to an alloy layer at the bonding interface.
  • the joint tends to become hard and brittle, and microcracks are likely to occur at the joint interface.
  • Explosives used for explosive pressure bonding are explosives that generate detonation waves. In order to bond metal plates firmly, it is preferable to use explosives with an explosion speed of 1000 m / s or more. To achieve a more optimal bonding force, the detonation speed is 1500 m, which is 1/3 to 1/2 the speed of sound. More preferably, an explosive of ⁇ 3000 m / sec is used. Specific explosives include ammonium nitrate and nitrate esters PETN (pentaerythritol tetranitrate), nitroglycerin, nitro compound TNT (trinitrotoluene), nitramine cyclotrimethylenetrinitramine and cyclotetramethylenetetranitramine. These may be used alone or in combination with other explosive components or other components other than explosives.
  • the location where the plate of the first high-temperature corrosion-resistant alloy containing Ni and Cr is crimped to the contact surface made of the base material of the exhaust valve rod exhibits a wavy joint interface and a joint interface that exhibits a linear state. Compared with the increased bonding area, the bonding strength is increased. On the other hand, if the wavelength or wave height of the wavy interface is increased, an intermetallic compound is likely to be generated at the bonding interface, so that the bonding interface may be hard and brittle. Therefore, it is preferable that the wavelength and wave height of the wavy bonding interface between different metals are each 1 mm or less.
  • wave height at the bonding interface indicates a difference in height from the top of the wave to the valley as shown in FIG.
  • the wave height was measured using an electron microscope by processing the explosive pressure-bonded exhaust valve rod 1 into a required shape and including a joint. In the measurement, 10 arbitrary points on the bonding interface were measured, and the average value was obtained.
  • an explosive pressure bonding non-crimped part having a diameter of about 5 to 30 mm may occur due to explosive pressure bonding.
  • the crimping part is cut or removed, and overlay welding is performed using a superalloy high-temperature corrosion-resistant metal plate 9 of the same or the same series as the superalloy high-temperature corrosion-resistant metal plate material 4 described above, and diluted. Can be formed integrally.
  • the explosive pressure bonding / non-pressure bonding portion can be reduced as much as possible by using a detonator 8 having a smaller diameter of about 4 to 5 mm.
  • the exhaust valve rod 1 subjected to explosive pressure bonding can be cut into a required shape, subjected to heat treatment such as required annealing such as 600 to 700 ° C., etc., and machine finished to be molded.
  • the contact surface 3 of the valve stem body 2 is instantaneously pressed.
  • the high-temperature corrosion-resistant metal plate material 4 of the Ni-base metal which is a high-temperature corrosion resistance of the superalloy, can be integrally joined, and the joining surface can be firmly joined in a wave shape, so that it can be used with good corrosion resistance.
  • 3 parts of the contact surface of the exhaust valve rod 1 joined by explosion pressure bonding are heat-treated to perform the required mechanical finish, and the above-mentioned 3 parts of explosion contact pressure surface have excellent corrosion resistance and strength.
  • As a metal structure excellent in crack prevention it can extend the long-term life of the exhaust valve rod of the internal combustion engine, and the high temperature resistance of the superalloy of the explosive pressure bonding non-bonded portion of the contact surface 3 of the exhaust valve rod 1 It is possible to prevent thermal stress distortion and cracking due to high temperature due to build-up welding of the corrosion-resistant metal 9.
  • stainless steel metal for heat-resistant stainless steel containing any one of SUS309, 310, and 316 as shown in Table 3 on the base material of the contact surface 3 of the exhaust valve rod 1 using heat-resistant steel of an internal combustion engine.
  • the plate material 10 and the high-temperature corrosion-resistant Ni-based metal plate material 11 of the superalloy mainly composed of Ni 40 to 60% and Cr 60 to 30% as described above are disposed and bonded together by explosive pressure bonding.
  • the explosive 7 can be explosively pressure-bonded with the above-described powdered explosive mainly composed of ammonium nitrate.
  • the required metal plate material can be explosively pressure-bonded, repaired in a shorter time than before, and reused with good corrosion resistance.
  • the exhaust valve stem 1 includes: 1) a material that can be used to evaluate the effects of actual use; 2) a material that can be economically matched; 3) the valve seat has high hardness and high corrosion resistance; 4 ) For the flaming surface, it is necessary to select a material that is resistant to sulfur attack, vanadium attack, and high pressure and high temperature resistance. Such a condition can be explosively pressure-bonded to the exhaust valve rod 1 which is a policy of mutually compensating with one or more kinds of materials as described above.
  • FIG. 1 and the following figures show examples of the present invention.
  • An exhaust valve rod 1 of a marine diesel engine is formed in a mushroom shape as shown in FIG. 1 and has a 200 mm diameter and 35 mm thickness of a mechanically finished valve stem body 2 of an exhaust valve rod 1 of an austenitic stainless steel SUH31.
  • a superalloy SUPER ALLOY (Mitsubishi Metal MC Alloy) high-temperature corrosion-resistant metal plate material 4 is applied to the fire surface 3 using the explosive pressure bonding method as shown in FIG.
  • a disk-shaped superalloy high-temperature corrosion-resistant metal plate material 4 of approximately the same size as the size of the flaming surface 3 is overlapped, and the upper surface of the superalloy high-temperature corrosion-resistant metal plate material 4 is overlapped.
  • a powdery explosive 7 containing ammonium nitrate as a main component is uniformly arranged in a required thickness, and the explosive 7 is exploded by a 6 mm diameter detonator 8 to be subjected to explosive pressure bonding.
  • the superalloy high-temperature corrosion-resistant metal sheet material 4 is 4 mm thick, and a powdery explosive 7 mainly composed of ammonium nitrate is uniformly loaded to a required thickness on the upper surface thereof.
  • an explosive pressure bonding non-crimped portion having a diameter of about 30 mm was generated at the center of contact surface 3 of exhaust valve rod 1 by explosive pressure bonding. Therefore, as shown in FIG. 4, the explosive pressure bonding non-bonding portion is cut and removed, and overlaying is performed using the same superalloy high temperature corrosion resistance metal plate 9 as the superalloy high temperature corrosion resistance metal plate material 4 described above. It was welded and diluted to form a single piece.
  • the operation valve rod 1 manufactured by explosive pressure bonding two test samples of a tensile test and a shear test were cut out each for strength test.
  • the tensile strength is 857.1 MPa, 845.6 MPa
  • the standard value is 760 MPa or more
  • the shear strength is 509.7 MPa, 444.4 MPa (JIS G 0601)
  • the standard value is 150 MPa or more. Both have sufficient strength and can be judged to have sufficient corrosion resistance and durability.
  • the wave height at the bonding interface was 55 ⁇ m.
  • the high-temperature corrosion-resistant metal plate material 4 of the superalloy of the superalloy of the required thickness (available 4 mm, 6 mm, 12 mm, etc.) is provided on the contact surface 3 of the exhaust valve rod 1.
  • Machine finishing is simple, manufacturing time can be shortened, quality can be improved, and price can be reduced.
  • FIG. 5 shows another embodiment of the present invention.
  • a stainless steel metal plate for stainless heat resistant such as SUS309 as shown in Table 3.
  • the material 10 and the Ni-based metal plate material 11 having a high temperature and corrosion resistance of a superalloy mainly composed of Ni 40 to 60% and Cr 60 to 30% as described above are overlapped at a necessary interval, and as described above. It is made to explode with a powdery explosive 7 containing ammonium nitrate as a main component and explosively pressure-bonded to be integrally joined.
  • the exhaust valve rod 1 can be used for repairing the damaged flaming surface 3 due to the use of the exhaust valve rod 1, and a required amount of the damaged flaming surface 3 is cut and overlay welded.
  • a stainless steel plate material 10 for heat-resistant stainless steel is explosively pressure-bonded to the contact surface 3 of the exhaust valve rod 1, and thereafter, a Ni-based metal plate material 11 of a superalloy having a high temperature resistance and corrosion resistance as shown in FIG. 6 (b).
  • Nimonic 80, 81 Ni-based heat resistant steel can also be selected and implemented in the same manner, Further, the Ni-based metal of Inconel 601, the Ni-based metal of the superalloy of Inconel filler metal 72, and heat resistant steels such as SUS310, 316 can be implemented based on the spirit of the present invention, and further, an appropriate combination thereof, Moreover, these deformation modes can be implemented.
  • the present invention can be used for exhaust valve rods of all internal combustion engines, such as marine diesel engines, gasoline engines, and other pistons that control reciprocating motion with aircraft and locomotives.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)

Abstract

L'invention fournit un procédé de fabrication selon lequel une couche métallique résistante aux hautes températures et à la corrosion, et liée d'un seul tenant simplement et en peu de temps à une face contact de feu d'une tige de soupape d'échappement pour moteur à combustion interne, et fournit également une tige de soupape d'échappement obtenue par ce procédé. Plus précisément, l'invention concerne une tige de soupape d'échappement pour moteur à combustion interne qui a un acier résistant à la chaleur pour matériau de base. Cette tige de soupape d'échappement est caractéristique en ce qu'une plaque d'un premier alliage résistant aux hautes températures et à la corrosion contenant du Ni et du Cr est collée par pression sur la face contact de feu constitué dudit matériau de base de la tige de soupape d'échappement, elle présente une interface de liaison en forme de vague, et un second alliage résistant aux hautes températures et à la corrosion contenant du Ni et du Cr est plaqué sur une partie centrale de la face contact de feu. L'invention concerne enfin le procédé de fabrication de cette tige de soupape d'échappement au moyen d'un placage par explosion.
PCT/JP2015/059658 2014-03-28 2015-03-27 Tige de soupape d'échappement pour moteur à combustion interne, et procédé de fabrication de celle-ci WO2015147272A1 (fr)

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CN201580014580.2A CN106103920B (zh) 2014-03-28 2015-03-27 内燃机的排气阀杆及其制法
JP2016510555A JP6132974B2 (ja) 2014-03-28 2015-03-27 内燃機関の排気弁棒及びその製法
KR1020167025423A KR101821082B1 (ko) 2014-03-28 2015-03-27 내연 기관의 배기 밸브 봉 및 그의 제법

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JP3038802U (ja) * 1996-12-17 1997-06-30 ポールスター工業株式会社 排気弁棒の補修触火面
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JP3175779U (ja) * 2012-02-06 2012-05-31 株式会社コカブ ディーゼル機関等の排気弁棒
JP2014145107A (ja) * 2013-01-29 2014-08-14 Mmc Superalloy Corp 耐高温腐食に優れたＮｉ基合金防食板およびその防食板を接合したディーゼルエンジン用排気弁

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JP3691494B2 (ja) 2003-03-20 2005-09-07 川崎重工業株式会社 内燃機関用の排気弁とその製造方法と再生方法
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JPS601310A (ja) * 1983-06-17 1985-01-07 Mitsubishi Metal Corp エンジンバルブの製造方法
JP3038802U (ja) * 1996-12-17 1997-06-30 ポールスター工業株式会社 排気弁棒の補修触火面
JPH1150821A (ja) * 1997-07-30 1999-02-23 N Z K:Kk ディーゼル機関用弁棒
JP3175779U (ja) * 2012-02-06 2012-05-31 株式会社コカブ ディーゼル機関等の排気弁棒
JP2014145107A (ja) * 2013-01-29 2014-08-14 Mmc Superalloy Corp 耐高温腐食に優れたＮｉ基合金防食板およびその防食板を接合したディーゼルエンジン用排気弁

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JP6132974B2 (ja) 2017-05-24
KR101821082B1 (ko) 2018-01-22
KR20160119231A (ko) 2016-10-12
CN106103920A (zh) 2016-11-09
CN106103920B (zh) 2018-09-25

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