CN104791041A - Air cylinder cover for automobile engine - Google Patents

Air cylinder cover for automobile engine Download PDF

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Publication number
CN104791041A
CN104791041A CN201510252101.2A CN201510252101A CN104791041A CN 104791041 A CN104791041 A CN 104791041A CN 201510252101 A CN201510252101 A CN 201510252101A CN 104791041 A CN104791041 A CN 104791041A
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China
Prior art keywords
insulation
surplus
seat ring
valve seat
intake valve
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CN201510252101.2A
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CN104791041B (en
Inventor
夏志清
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Zhejiang Kaiji Automobile Spare Parts Manufacture Co., Ltd.
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夏志清
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Priority to CN201710967541.5A priority Critical patent/CN107794459B/en
Priority to CN201510252101.2A priority patent/CN104791041B/en
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    • 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
    • C22C38/34—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of silicon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • 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
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • 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
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/04—Hardening by cooling below 0 degrees Celsius
    • 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
    • C22C27/00—Alloys based on rhenium or a refractory metal not mentioned in groups C22C14/00 or C22C16/00
    • C22C27/04—Alloys based on tungsten or molybdenum
    • 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
    • C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
    • 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
    • C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
    • 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
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
    • 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
    • C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
    • 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
    • C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
    • 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
    • C22C38/52—Ferrous alloys, e.g. steel alloys containing chromium with nickel with cobalt
    • 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
    • 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
    • C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
    • C23C4/131—Wire arc spraying
    • 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
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
    • C23C8/28—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases more than one element being applied in one step
    • C23C8/30—Carbo-nitriding
    • C23C8/32—Carbo-nitriding of ferrous surfaces
    • 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
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • F02F1/42—Shape or arrangement of intake or exhaust channels in cylinder heads

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Heat Treatment Of Articles (AREA)
  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)

Abstract

The invention discloses an air cylinder cover for an automobile engine. The air cylinder cover comprises an air inlet valve component for air suction of an engine, and an air inlet valve seat ring matched with the air inlet valve component. Carbonitriding heat treatment is carried out on an air valve of the engine, so that the hardness and the strength of the air inlet valve are improved; corrosion spots are avoided; through surfacing treatment, relatively high abrasion resistance and impact resistance are reached for the conical surface of the air valve of the engine; and the corresponding fatigue performance is also improved.

Description

A kind of cylinder cover of automobile engine
Technical field
The present invention relates to a kind of cylinder cover of automobile engine, belongs to automobile engine accessory technical field.
Background technique
Automobile inlet and exhaust valve and inlet and exhaust valve seat ring are the basic parts of cylinder, and the quality of its quality directly affects the main performance index such as engine power and oil consumption, very big to the reliability effect of motor.The work under bad environment of inlet and exhaust valve and inlet and exhaust valve seat ring, it not only bears high speed impact load, and will work having under etchant gas condition, therefore engine breathing door and inlet and exhaust valve seat ring have become the easily damaged parts needing often to change, and therefore improve the problem that the service property (quality) of valve and air valve seat ring and life-span be and need solve.
Summary of the invention
A kind of cylinder cover of automobile engine, cylinder head comprises for the intake valve parts of engine charge and the inlet valve seat ring that matches with intake valve parts,
Inlet valve seat ring chemical element consists of (weight percentage): C:0.06-0.07 ﹪, Si:2-3 ﹪, Cu:1-2 ﹪, W:0.8-0.9 ﹪, Cr:0.4-0.5 ﹪, Ni:0.2-0.3 ﹪, Nb:0.2-0.3 ﹪, V:0.1-0.2 ﹪, Ti:0.07-0.08 ﹪, Al:0.05-0.06 ﹪, Mn:0.02-0.03 ﹪, Mg:0.02-0.03 ﹪, Mo:0.01-0.02 ﹪, Ce:0.01-0.02 ﹪, surplus is Fe and inevitable impurity;
Suction valve cone coil preparation method: comprise the following steps: according to aforementioned proportion alloyage, raw material melting, cast, after the demoulding, the air valve seat ring base substrate obtained sends into oven, is warming up to 900 DEG C, heating rate 75 DEG C/h, be incubated 3 hours, water hardening afterwards, again heat base substrate and be incubated 5 hours at 620 DEG C, air cooling of coming out of the stove is to room temperature; Base substrate puts into liquid nitrogen cryogenic treatment 10 minutes, goes back up to room temperature in atmosphere; Afterwards meticulous machining is carried out to base substrate,
Coated with tungsten carbide system coating is carried out to the inlet valve seat ring after meticulous machining; Tungsten carbite based material layer comprises (weight): Tungsten carbite 80 parts, silica 10-20 part, and heated by the air valve seat ring after coating, be warming up to 600 DEG C, heating rate 200 DEG C/h, be incubated 10 hours, rear air cooling, to room temperature, obtains final inlet valve seat ring,
Manufacturing intake valve concrete steps is:
Carry out melting according to the elemental constituent of intake valve material of main part, after cast, obtain blank, intake valve material of main part is: C0.13-0.27%, Si3.4-4%, Mn0.8-0.95%, P≤0.035%, S≤0.035%, Ti1.2-1.9%, Cr 5-7%, W 3-4%, Ni2.8-3.24%, Co 1-1.2%, surplus is Fe and inevitable impurity;
Adopt electric upset forging to forge blank, final forging temperature is 900 DEG C, and forging deformation amount controls at 65%-85%, and jumping-up speed is 10mm/s;
Multistage quenching-and-tempering process is carried out: shrend after 1050-1080 DEG C of insulation 10s, 450-500 DEG C of tempering after forging; Then oil quenching after 980-1010 DEG C of insulation 10s, 430-440 DEG C of tempering; Oil quenching after last 950-970 DEG C of insulation 10s, 380-410 DEG C of tempering;
Carry out after heat treatment workpiece cutting,
Carry out carbonitriding heat treatment to workpiece surface after cutting, strong infiltrate journey: temperature 950-980 DEG C of scope, carbon potential and nitrogen gesture take level Four step, carbon potential 0.4-0.6%, nitrogen gesture 1.2-1.4%, insulation 3h, then raise carbon potential to 0.7-0.9%, reduce nitrogen gesture to 1.0-1.1%, insulation 2h, raise carbon potential again to 1.0-1.1%, reduce nitrogen gesture to 0.7-0.9%, insulation 2h, finally raise carbon potential to 1.2-1.6%, reduce nitrogen gesture to 0.4-0.5%, insulation 2.5h; Spread after oozing by force, diffusion process: control furnace temperature and be down to 900-920 DEG C, insulation 3h, is cooled to 820-850 DEG C, insulation 4h, and diffusion process carbon-potential control is between 1.2 ~ 1.3%, and nitrogen potential control is between 1.0 ~ 1.1%; Air cooling is to room temperature; Quench after diffusion, quenching process: carry out oil quenching at 850 DEG C, Oil-temperature control is at 70 DEG C; Cleaning process: remove component surface oil stain, rinse liquid temperature controls at 50 DEG C; Tempering: carry out low-temperature tempering, controls furnace temperature 180 DEG C, time 150-200 minute.
To the processing of workpiece conical surface grinding,
Carry out conical surface built-up welding to workpiece after conical surface grinding processing, conical surface bead-welding technology is: 150-200 DEG C of preheating, nontransferred arc voltage 20V, nontransferred arc electric current 50A; The distance 10-12mm of nozzle and workpiece surface, has welded rear Slow cooling; Weld overlay materials is: Co 38.5-40%, Ni 0.68-0.95%, B 0.1-0.25%, Ta 0.2-0.6%, Sn 1-3%, Gd 0.12-0.26%, C 0.05-0.13%, and surplus is W;
Workpiece surface is polished
To workpiece surface coated with tungsten carbide coating after workpiece surface polishing, coating thickness is about 10-15 micron; Afterwards at the outer covering aluminum oxide coating of tungsten carbide coating, coating thickness is about 5-10 micron, obtains intake valve.
Described a kind of cylinder cover of automobile engine, inlet valve seat ring chemical element consists of (weight percentage): C:0.06 ﹪, Si:2 ﹪, Cu:1 ﹪, W:0.8 ﹪, Cr:0.4 ﹪, Ni:0.2 ﹪, Nb:0.2 ﹪, V:0.1 ﹪, Ti:0.07 ﹪, Al:0.05 ﹪, Mn:0.02 ﹪, Mg:0.02 ﹪, Mo:0.01 ﹪, Ce:0.01 ﹪, surplus is Fe and inevitable impurity.
Described a kind of cylinder cover of automobile engine, inlet valve seat ring chemical element consists of (weight percentage): C:0.07 ﹪, Si:3 ﹪, Cu:2 ﹪, W:0.9 ﹪, Cr:0.5 ﹪, Ni:0.3 ﹪, Nb:0.3 ﹪, V:0.2 ﹪, Ti:0.08 ﹪, Al:0.06 ﹪, Mn:0.03 ﹪, Mg:0.03 ﹪, Mo:0.02 ﹪, Ce:0.02 ﹪, surplus is Fe and inevitable impurity.
Described a kind of cylinder cover of automobile engine, inlet valve seat ring chemical element consists of (weight percentage): C:0.065 ﹪, Si:2.5 ﹪, Cu:1.5 ﹪, W:0.85 ﹪, Cr:0.45 ﹪, Ni:0.25 ﹪, Nb:0.25 ﹪, V:0.15 ﹪, Ti:0.075 ﹪, Al:0.055 ﹪, Mn:0.025 ﹪, Mg:0.025 ﹪, Mo:0.015 ﹪, Ce:0.015 ﹪, surplus is Fe and inevitable impurity.
Described a kind of cylinder cover of automobile engine, intake valve material of main part is: C0.13%, Si3.4%, Mn0.8%, P≤0.035%, S≤0.035%, Ti1.2%, Cr 5%, W 3%, Ni2.8%, Co 1%, and surplus is Fe and inevitable impurity.
Described a kind of cylinder cover of automobile engine, intake valve material of main part is: C 0.27%, Si 4%, Mn 0.95%, P≤0.035%, S≤0.035%, Ti 1.9%, Cr 7%, W 4%, Ni 3.24%, Co 1.2%, and surplus is Fe and inevitable impurity.
Described a kind of cylinder cover of automobile engine, intake valve material of main part is: C0.2%, Si 3.7%, Mn 0.9%, P≤0.035%, S≤0.035%, Ti 1.5%, Cr 6%, W 3.5%, Ni 3%, Co 1.1%, and surplus is Fe and inevitable impurity.
Described a kind of Motor Engine Cylinder lid, weld overlay materials is: Co 38.5%, Ni 0.68%, B 0.1%, Ta 0.2%, Sn 1%, Gd 0.12%, C 0.05%, surplus is W.
Described a kind of Motor Engine Cylinder lid, weld overlay materials is: Co 40%, Ni 0.95%, B 0.25%, Ta 0.6%, Sn 3%, Gd 0.26%, C 0.13%, surplus is W.
Described a kind of cylinder cover of automobile engine, weld overlay materials is: Co 39%, Ni 0.8%, B 0.2%, Ta 0.4%, Sn 2%, Gd 0.2%, C 0.1%, surplus is W.
Foregoing invention content is relative to the beneficial effect of prior art: 1) ferrous alloy material of the present invention fully can meet the requirement of strength of engine valve material of main part; 2) hardness and the intensity that carbonitriding heat treatment improves intake valve is carried out to engine valve, avoid occurring hot spot; 3) make the engine valve conical surface reach higher wear resistance and shock-resistant by built-up welding process, corresponding fatigue behaviour is also improved; 4) by engine valve applying coating, anticorrosion, high temperature resistant, the wear-resisting property of material is improved.5) inlet valve seat ring carries out cryogenic treatment and improves its shock-resistant and fatigue behaviour; 5) carry out applying coating two coatings to inlet valve seat ring and engine valve respectively to cooperatively interact and reach the effect of little wear extent.
Embodiment
In order to there be understanding clearly to technical characteristics of the present invention, object and effect, now describe the specific embodiment of the present invention in detail.
Embodiment 1
A kind of cylinder cover of automobile engine, cylinder head comprises for the intake valve parts of engine charge and the inlet valve seat ring that matches with intake valve parts,
Inlet valve seat ring chemical element consists of (weight percentage): C:0.06 ﹪, Si:2 ﹪, Cu:1 ﹪, W:0.8 ﹪, Cr:0.4 ﹪, Ni:0.2 ﹪, Nb:0.2 ﹪, V:0.1 ﹪, Ti:0.07 ﹪, Al:0.05 ﹪, Mn:0.02 ﹪, Mg:0.02 ﹪, Mo:0.01 ﹪, Ce:0.01 ﹪, surplus is Fe and inevitable impurity;
Suction valve cone coil preparation method: comprise the following steps: according to aforementioned proportion alloyage, raw material melting, cast, after the demoulding, the air valve seat ring base substrate obtained sends into oven, is warming up to 900 DEG C, heating rate 75 DEG C/h, be incubated 3 hours, water hardening afterwards, again heat base substrate and be incubated 5 hours at 620 DEG C, air cooling of coming out of the stove is to room temperature; Base substrate puts into liquid nitrogen cryogenic treatment 10 minutes, goes back up to room temperature in atmosphere; Afterwards meticulous machining is carried out to base substrate,
Coated with tungsten carbide system coating is carried out to the inlet valve seat ring after meticulous machining; Tungsten carbite based material layer comprises (weight): Tungsten carbite 80 parts, silica 10 parts, and heated by the air valve seat ring after coating, be warming up to 600 DEG C, heating rate 200 DEG C/h, be incubated 10 hours, rear air cooling, to room temperature, obtains final inlet valve seat ring,
Manufacturing intake valve concrete steps is:
Carry out melting according to the elemental constituent of intake valve material of main part, after cast, obtain blank, intake valve material of main part is: C0.13%, Si3.4%, Mn0.8%, P≤0.035%, S≤0.035%, Ti1.2%, Cr 5%, W 3%, Ni2.8%, Co 1%, surplus is Fe and inevitable impurity;
Adopt electric upset forging to forge blank, final forging temperature is 900 DEG C, and forging deformation amount controls at 65%-85%, and jumping-up speed is 10mm/s;
Multistage quenching-and-tempering process is carried out: shrend after 1050 DEG C of insulation 10s, 450 DEG C of tempering after forging; Then oil quenching after 980 DEG C of insulation 10s, 430 DEG C of tempering; Oil quenching after last 950 DEG C of insulation 10s, 380 DEG C of tempering;
Carry out after heat treatment workpiece cutting,
Carry out carbonitriding heat treatment to workpiece surface after cutting, strong infiltrate journey: temperature 950-980 DEG C of scope, carbon potential and nitrogen gesture take level Four step, carbon potential 0.4-0.6%, nitrogen gesture 1.2-1.4%, insulation 3h, then raise carbon potential to 0.7-0.9%, reduce nitrogen gesture to 1.0-1.1%, insulation 2h, raise carbon potential again to 1.0-1.1%, reduce nitrogen gesture to 0.7-0.9%, insulation 2h, finally raise carbon potential to 1.2-1.6%, reduce nitrogen gesture to 0.4-0.5%, insulation 2.5h; Spread after oozing by force, diffusion process: control furnace temperature and be down to 900-920 DEG C, insulation 3h, is cooled to 820-850 DEG C, insulation 4h, and diffusion process carbon-potential control is between 1.2 ~ 1.3%, and nitrogen potential control is between 1.0 ~ 1.1%; Air cooling is to room temperature; Quench after diffusion, quenching process: carry out oil quenching at 850 DEG C, Oil-temperature control is at 70 DEG C; Cleaning process: remove component surface oil stain, rinse liquid temperature controls at 50 DEG C; Tempering: carry out low-temperature tempering, controls furnace temperature 180 DEG C, time 150-200 minute.
To the processing of workpiece conical surface grinding,
Carry out conical surface built-up welding to workpiece after conical surface grinding processing, conical surface bead-welding technology is: 150-200 DEG C of preheating, nontransferred arc voltage 20V, nontransferred arc electric current 50A; The distance 10-12mm of nozzle and workpiece surface, has welded rear Slow cooling; Weld overlay materials is: Co 38.5%, Ni 0.68%, B 0.1%, Ta 0.2%, Sn 1%, Gd 0.12%, C 0.05%, and surplus is W;
Workpiece surface is polished
To workpiece surface coated with tungsten carbide coating after workpiece surface polishing, coating thickness about 10 microns; Afterwards at the outer covering aluminum oxide coating of tungsten carbide coating, coating thickness about 5 microns, obtains intake valve.
Embodiment 2
A kind of cylinder cover of automobile engine, cylinder head comprises for the intake valve parts of engine charge and the inlet valve seat ring that matches with intake valve parts,
Inlet valve seat ring chemical element consists of (weight percentage): C:0.07 ﹪, Si:3 ﹪, Cu:2 ﹪, W:0.9 ﹪, Cr:0.5 ﹪, Ni:0.3 ﹪, Nb:0.3 ﹪, V:0.2 ﹪, Ti:0.08 ﹪, Al:0.06 ﹪, Mn:0.03 ﹪, Mg:0.03 ﹪, Mo:0.02 ﹪, Ce:0.02 ﹪, surplus is Fe and inevitable impurity;
Suction valve cone coil preparation method: comprise the following steps: according to aforementioned proportion alloyage, raw material melting, cast, after the demoulding, the air valve seat ring base substrate obtained sends into oven, is warming up to 900 DEG C, heating rate 75 DEG C/h, be incubated 3 hours, water hardening afterwards, again heat base substrate and be incubated 5 hours at 620 DEG C, air cooling of coming out of the stove is to room temperature; Base substrate puts into liquid nitrogen cryogenic treatment 10 minutes, goes back up to room temperature in atmosphere; Afterwards meticulous machining is carried out to base substrate,
Coated with tungsten carbide system coating is carried out to the inlet valve seat ring after meticulous machining; Tungsten carbite based material layer comprises (weight): Tungsten carbite 80 parts, silica 20 parts, and heated by the air valve seat ring after coating, be warming up to 600 DEG C, heating rate 200 DEG C/h, be incubated 10 hours, rear air cooling, to room temperature, obtains final inlet valve seat ring,
Manufacturing intake valve concrete steps is:
Carry out melting according to the elemental constituent of intake valve material of main part, after cast, obtain blank, intake valve material of main part is: C 0.27%, Si 4%, Mn 0.95%, P≤0.035%, S≤0.035%, Ti 1.9%, Cr 7%, W 4%, Ni 3.24%, Co 1.2%, surplus is Fe and inevitable impurity;
Adopt electric upset forging to forge blank, final forging temperature is 900 DEG C, and forging deformation amount controls at 65%-85%, and jumping-up speed is 10mm/s;
Multistage quenching-and-tempering process is carried out: shrend after 1080 DEG C of insulation 10s, 500 DEG C of tempering after forging; Then oil quenching after 1010 DEG C of insulation 10s, 440 DEG C of tempering; Oil quenching after last 970 DEG C of insulation 10s, 410 DEG C of tempering;
Carry out after heat treatment workpiece cutting,
Carry out carbonitriding heat treatment to workpiece surface after cutting, strong infiltrate journey: temperature 950-980 DEG C of scope, carbon potential and nitrogen gesture take level Four step, carbon potential 0.4-0.6%, nitrogen gesture 1.2-1.4%, insulation 3h, then raise carbon potential to 0.7-0.9%, reduce nitrogen gesture to 1.0-1.1%, insulation 2h, raise carbon potential again to 1.0-1.1%, reduce nitrogen gesture to 0.7-0.9%, insulation 2h, finally raise carbon potential to 1.2-1.6%, reduce nitrogen gesture to 0.4-0.5%, insulation 2.5h; Spread after oozing by force, diffusion process: control furnace temperature and be down to 900-920 DEG C, insulation 3h, is cooled to 820-850 DEG C, insulation 4h, and diffusion process carbon-potential control is between 1.2 ~ 1.3%, and nitrogen potential control is between 1.0 ~ 1.1%; Air cooling is to room temperature; Quench after diffusion, quenching process: carry out oil quenching at 850 DEG C, Oil-temperature control is at 70 DEG C; Cleaning process: remove component surface oil stain, rinse liquid temperature controls at 50 DEG C; Tempering: carry out low-temperature tempering, controls furnace temperature 180 DEG C, time 150-200 minute.
To the processing of workpiece conical surface grinding,
Carry out conical surface built-up welding to workpiece after conical surface grinding processing, conical surface bead-welding technology is: 150-200 DEG C of preheating, nontransferred arc voltage 20V, nontransferred arc electric current 50A; The distance 10-12mm of nozzle and workpiece surface, has welded rear Slow cooling; Weld overlay materials is: Co 40%, Ni 0.95%, B 0.25%, Ta 0.6%, Sn 3%, Gd 0.26%, C 0.13%, and surplus is W;
Workpiece surface is polished
To workpiece surface coated with tungsten carbide coating after workpiece surface polishing, coating thickness about 15 microns; Afterwards at the outer covering aluminum oxide coating of tungsten carbide coating, coating thickness about 10 microns, obtains intake valve.
Embodiment 3
A kind of cylinder cover of automobile engine, cylinder head comprises for the intake valve parts of engine charge and the inlet valve seat ring that matches with intake valve parts,
Inlet valve seat ring chemical element consists of (weight percentage): C:0.065 ﹪, Si:2.5 ﹪, Cu:1.5 ﹪, W:0.85 ﹪, Cr:0.45 ﹪, Ni:0.25 ﹪, Nb:0.25 ﹪, V:0.15 ﹪, Ti:0.075 ﹪, Al:0.055 ﹪, Mn:0.025 ﹪, Mg:0.025 ﹪, Mo:0.015 ﹪, Ce:0.015 ﹪, surplus is Fe and inevitable impurity;
Suction valve cone coil preparation method: comprise the following steps: according to aforementioned proportion alloyage, raw material melting, cast, after the demoulding, the air valve seat ring base substrate obtained sends into oven, is warming up to 900 DEG C, heating rate 75 DEG C/h, be incubated 3 hours, water hardening afterwards, again heat base substrate and be incubated 5 hours at 620 DEG C, air cooling of coming out of the stove is to room temperature; Base substrate puts into liquid nitrogen cryogenic treatment 10 minutes, goes back up to room temperature in atmosphere; Afterwards meticulous machining is carried out to base substrate,
Coated with tungsten carbide system coating is carried out to the inlet valve seat ring after meticulous machining; Tungsten carbite based material layer comprises (weight): Tungsten carbite 80 parts, silica 15 parts, and heated by the air valve seat ring after coating, be warming up to 600 DEG C, heating rate 200 DEG C/h, be incubated 10 hours, rear air cooling, to room temperature, obtains final inlet valve seat ring,
Manufacturing intake valve concrete steps is:
Carry out melting according to the elemental constituent of intake valve material of main part, after cast, obtain blank, intake valve material of main part is: C0.2%, Si 3.7%, Mn 0.9%, P≤0.035%, S≤0.035%, Ti 1.5%, Cr 6%, W 3.5%, Ni 3%, Co 1.1%, surplus is Fe and inevitable impurity;
Adopt electric upset forging to forge blank, final forging temperature is 900 DEG C, and forging deformation amount controls at 65%-85%, and jumping-up speed is 10mm/s;
Multistage quenching-and-tempering process is carried out: shrend after 1070 DEG C of insulation 10s, 470 DEG C of tempering after forging; Then oil quenching after 990 DEG C of insulation 10s, 435 DEG C of tempering; Oil quenching after last 960 DEG C of insulation 10s, 390 DEG C of tempering;
Carry out after heat treatment workpiece cutting,
Carry out carbonitriding heat treatment to workpiece surface after cutting, strong infiltrate journey: temperature 950-980 DEG C of scope, carbon potential and nitrogen gesture take level Four step, carbon potential 0.4-0.6%, nitrogen gesture 1.2-1.4%, insulation 3h, then raise carbon potential to 0.7-0.9%, reduce nitrogen gesture to 1.0-1.1%, insulation 2h, raise carbon potential again to 1.0-1.1%, reduce nitrogen gesture to 0.7-0.9%, insulation 2h, finally raise carbon potential to 1.2-1.6%, reduce nitrogen gesture to 0.4-0.5%, insulation 2.5h; Spread after oozing by force, diffusion process: control furnace temperature and be down to 900-920 DEG C, insulation 3h, is cooled to 820-850 DEG C, insulation 4h, and diffusion process carbon-potential control is between 1.2 ~ 1.3%, and nitrogen potential control is between 1.0 ~ 1.1%; Air cooling is to room temperature; Quench after diffusion, quenching process: carry out oil quenching at 850 DEG C, Oil-temperature control is at 70 DEG C; Cleaning process: remove component surface oil stain, rinse liquid temperature controls at 50 DEG C; Tempering: carry out low-temperature tempering, controls furnace temperature 180 DEG C, time 150-200 minute.
To the processing of workpiece conical surface grinding,
Carry out conical surface built-up welding to workpiece after conical surface grinding processing, conical surface bead-welding technology is: 150-200 DEG C of preheating, nontransferred arc voltage 20V, nontransferred arc electric current 50A; The distance 10-12mm of nozzle and workpiece surface, has welded rear Slow cooling; Weld overlay materials is: Co 39%, Ni 0.8%, B 0.2%, Ta 0.4%, Sn 2%, Gd 0.2%, C 0.1%, and surplus is W;
Workpiece surface is polished
To workpiece surface coated with tungsten carbide coating after workpiece surface polishing, coating thickness about 13 microns; Afterwards at the outer covering aluminum oxide coating of tungsten carbide coating, coating thickness about 7 microns, obtains intake valve.
Embodiment 4
A kind of cylinder cover of automobile engine, cylinder head comprises for the intake valve parts of engine charge and the inlet valve seat ring that matches with intake valve parts,
Inlet valve seat ring chemical element consists of (weight percentage): C:0.062 ﹪, Si:2.3 ﹪, Cu:1.1 ﹪, W:0.83 ﹪, Cr:0.44 ﹪, Ni:0.22 ﹪, Nb:0.22 ﹪, V:0.11 ﹪, Ti:0.071 ﹪, Al:0.054 ﹪, Mn:0.023 ﹪, Mg:0.022 ﹪, Mo:0.013 ﹪, Ce:0.011 ﹪, surplus is Fe and inevitable impurity;
Suction valve cone coil preparation method: comprise the following steps: according to aforementioned proportion alloyage, raw material melting, cast, after the demoulding, the air valve seat ring base substrate obtained sends into oven, is warming up to 900 DEG C, heating rate 75 DEG C/h, be incubated 3 hours, water hardening afterwards, again heat base substrate and be incubated 5 hours at 620 DEG C, air cooling of coming out of the stove is to room temperature; Base substrate puts into liquid nitrogen cryogenic treatment 10 minutes, goes back up to room temperature in atmosphere; Afterwards meticulous machining is carried out to base substrate,
Coated with tungsten carbide system coating is carried out to the inlet valve seat ring after meticulous machining; Tungsten carbite based material layer comprises (weight): Tungsten carbite 80 parts, silica 12 parts, and heated by the air valve seat ring after coating, be warming up to 600 DEG C, heating rate 200 DEG C/h, be incubated 10 hours, rear air cooling, to room temperature, obtains final inlet valve seat ring,
Manufacturing intake valve concrete steps is:
Carry out melting according to the elemental constituent of intake valve material of main part, after cast, obtain blank, intake valve material of main part is: C0.14%, Si3.5%, Mn0.85%, P≤0.035%, S≤0.035%, Ti 1.3%, Cr 5.3%, W 3.2%, Ni 2.9%, Co 1.05%, surplus is Fe and inevitable impurity;
Adopt electric upset forging to forge blank, final forging temperature is 900 DEG C, and forging deformation amount controls at 65%-85%, and jumping-up speed is 10mm/s;
Multistage quenching-and-tempering process is carried out: shrend after 1055 DEG C of insulation 10s, 455 DEG C of tempering after forging; Then oil quenching after 985 DEG C of insulation 10s, 434 DEG C of tempering; Oil quenching after last 953 DEG C of insulation 10s, 382 DEG C of tempering;
Carry out after heat treatment workpiece cutting,
Carry out carbonitriding heat treatment to workpiece surface after cutting, strong infiltrate journey: temperature 950-980 DEG C of scope, carbon potential and nitrogen gesture take level Four step, carbon potential 0.4-0.6%, nitrogen gesture 1.2-1.4%, insulation 3h, then raise carbon potential to 0.7-0.9%, reduce nitrogen gesture to 1.0-1.1%, insulation 2h, raise carbon potential again to 1.0-1.1%, reduce nitrogen gesture to 0.7-0.9%, insulation 2h, finally raise carbon potential to 1.2-1.6%, reduce nitrogen gesture to 0.4-0.5%, insulation 2.5h; Spread after oozing by force, diffusion process: control furnace temperature and be down to 900-920 DEG C, insulation 3h, is cooled to 820-850 DEG C, insulation 4h, and diffusion process carbon-potential control is between 1.2 ~ 1.3%, and nitrogen potential control is between 1.0 ~ 1.1%; Air cooling is to room temperature; Quench after diffusion, quenching process: carry out oil quenching at 850 DEG C, Oil-temperature control is at 70 DEG C; Cleaning process: remove component surface oil stain, rinse liquid temperature controls at 50 DEG C; Tempering: carry out low-temperature tempering, controls furnace temperature 180 DEG C, time 150-200 minute.
To the processing of workpiece conical surface grinding,
Carry out conical surface built-up welding to workpiece after conical surface grinding processing, conical surface bead-welding technology is: 150-200 DEG C of preheating, nontransferred arc voltage 20V, nontransferred arc electric current 50A; The distance 10-12mm of nozzle and workpiece surface, has welded rear Slow cooling; Weld overlay materials is: Co 38.7%, Ni 0.7%, B 0.13%, Ta 0.25%, Sn 1.2%, Gd 0.15%, C 0.06%, and surplus is W;
Workpiece surface is polished
To workpiece surface coated with tungsten carbide coating after workpiece surface polishing, coating thickness about 11 microns; Afterwards at the outer covering aluminum oxide coating of tungsten carbide coating, coating thickness about 6 microns, obtains intake valve.
Embodiment 5
A kind of cylinder cover of automobile engine, cylinder head comprises for the intake valve parts of engine charge and the inlet valve seat ring that matches with intake valve parts,
Inlet valve seat ring chemical element consists of (weight percentage): C:0.067 ﹪, Si:2.8 ﹪, Cu:1.9 ﹪, W:0.87 ﹪, Cr:0.46 ﹪, Ni:0.27 ﹪, Nb:0.28 ﹪, V:0.19 ﹪, Ti:0.079 ﹪, Al:0.058 ﹪, Mn:0.028 ﹪, Mg:0.027 ﹪, Mo:0.018 ﹪, Ce:0.017 ﹪, surplus is Fe and inevitable impurity;
Suction valve cone coil preparation method: comprise the following steps: according to aforementioned proportion alloyage, raw material melting, cast, after the demoulding, the air valve seat ring base substrate obtained sends into oven, is warming up to 900 DEG C, heating rate 75 DEG C/h, be incubated 3 hours, water hardening afterwards, again heat base substrate and be incubated 5 hours at 620 DEG C, air cooling of coming out of the stove is to room temperature; Base substrate puts into liquid nitrogen cryogenic treatment 10 minutes, goes back up to room temperature in atmosphere; Afterwards meticulous machining is carried out to base substrate,
Coated with tungsten carbide system coating is carried out to the inlet valve seat ring after meticulous machining; Tungsten carbite based material layer comprises (weight): Tungsten carbite 80 parts, silica 18 parts, and heated by the air valve seat ring after coating, be warming up to 600 DEG C, heating rate 200 DEG C/h, be incubated 10 hours, rear air cooling, to room temperature, obtains final inlet valve seat ring,
Manufacturing intake valve concrete steps is:
Carry out melting according to the elemental constituent of intake valve material of main part, after cast, obtain blank, intake valve material of main part is: C0.25%, Si 3.9%, Mn0.93%, P≤0.035%, S≤0.035%, Ti1.8%, Cr 6.7%, W 3.7%, Ni 3.1%, Co 1.17%, surplus is Fe and inevitable impurity;
Adopt electric upset forging to forge blank, final forging temperature is 900 DEG C, and forging deformation amount controls at 65%-85%, and jumping-up speed is 10mm/s;
Multistage quenching-and-tempering process is carried out: shrend after 1075 DEG C of insulation 10s, 490 DEG C of tempering after forging; Then oil quenching after 1005 DEG C of insulation 10s, 438 DEG C of tempering; Oil quenching after last 965 DEG C of insulation 10s, 400 DEG C of tempering;
Carry out after heat treatment workpiece cutting,
Carry out carbonitriding heat treatment to workpiece surface after cutting, strong infiltrate journey: temperature 950-980 DEG C of scope, carbon potential and nitrogen gesture take level Four step, carbon potential 0.4-0.6%, nitrogen gesture 1.2-1.4%, insulation 3h, then raise carbon potential to 0.7-0.9%, reduce nitrogen gesture to 1.0-1.1%, insulation 2h, raise carbon potential again to 1.0-1.1%, reduce nitrogen gesture to 0.7-0.9%, insulation 2h, finally raise carbon potential to 1.2-1.6%, reduce nitrogen gesture to 0.4-0.5%, insulation 2.5h; Spread after oozing by force, diffusion process: control furnace temperature and be down to 900-920 DEG C, insulation 3h, is cooled to 820-850 DEG C, insulation 4h, and diffusion process carbon-potential control is between 1.2 ~ 1.3%, and nitrogen potential control is between 1.0 ~ 1.1%; Air cooling is to room temperature; Quench after diffusion, quenching process: carry out oil quenching at 850 DEG C, Oil-temperature control is at 70 DEG C; Cleaning process: remove component surface oil stain, rinse liquid temperature controls at 50 DEG C; Tempering: carry out low-temperature tempering, controls furnace temperature 180 DEG C, time 150-200 minute.
To the processing of workpiece conical surface grinding,
Carry out conical surface built-up welding to workpiece after conical surface grinding processing, conical surface bead-welding technology is: 150-200 DEG C of preheating, nontransferred arc voltage 20V, nontransferred arc electric current 50A; The distance 10-12mm of nozzle and workpiece surface, has welded rear Slow cooling; Weld overlay materials is: Co 39.3%, Ni 0.92%, B 0.23%, Ta 0.55%, Sn 2.7%, Gd 0.24%, C 0.11%, and surplus is W;
Workpiece surface is polished
To workpiece surface coated with tungsten carbide coating after workpiece surface polishing, coating thickness about 14 microns; Afterwards at the outer covering aluminum oxide coating of tungsten carbide coating, coating thickness about 9 microns, obtains intake valve.

Claims (10)

1. a cylinder cover of automobile engine, cylinder head comprises for the intake valve parts of engine charge and the inlet valve seat ring that matches with intake valve parts,
Inlet valve seat ring chemical element consists of (weight percentage): C:0.06-0.07 ﹪, Si:2-3 ﹪, Cu:1-2 ﹪, W:0.8-0.9 ﹪, Cr:0.4-0.5 ﹪, Ni:0.2-0.3 ﹪, Nb:0.2-0.3 ﹪, V:0.1-0.2 ﹪, Ti:0.07-0.08 ﹪, Al:0.05-0.06 ﹪, Mn:0.02-0.03 ﹪, Mg:0.02-0.03 ﹪, Mo:0.01-0.02 ﹪, Ce:0.01-0.02 ﹪, surplus is Fe and inevitable impurity;
Suction valve cone coil preparation method: comprise the following steps: according to aforementioned proportion alloyage, raw material melting, cast, after the demoulding, the air valve seat ring base substrate obtained sends into oven, is warming up to 900 DEG C, heating rate 75 DEG C/h, be incubated 3 hours, water hardening afterwards, again heat base substrate and be incubated 5 hours at 620 DEG C, air cooling of coming out of the stove is to room temperature; Base substrate puts into liquid nitrogen cryogenic treatment 10 minutes, goes back up to room temperature in atmosphere; Afterwards meticulous machining is carried out to base substrate,
Coated with tungsten carbide system coating is carried out to the inlet valve seat ring after meticulous machining; Tungsten carbite based material layer comprises (weight): Tungsten carbite 80 parts, silica 10-20 part, and heated by the air valve seat ring after coating, be warming up to 600 DEG C, heating rate 200 DEG C/h, be incubated 10 hours, rear air cooling, to room temperature, obtains final inlet valve seat ring,
Manufacturing intake valve concrete steps is:
Carry out melting according to the elemental constituent of intake valve material of main part, after cast, obtain blank, intake valve material of main part is: C0.13-0.27%, Si3.4-4%, Mn0.8-0.95%, P≤0.035%, S≤0.035%, Ti1.2-1.9%, Cr 5-7%, W 3-4%, Ni2.8-3.24%, Co 1-1.2%, surplus is Fe and inevitable impurity;
Adopt electric upset forging to forge blank, final forging temperature is 900 DEG C, and forging deformation amount controls at 65%-85%, and jumping-up speed is 10mm/s;
Multistage quenching-and-tempering process is carried out: shrend after 1050-1080 DEG C of insulation 10s, 450-500 DEG C of tempering after forging; Then oil quenching after 980-1010 DEG C of insulation 10s, 430-440 DEG C of tempering; Oil quenching after last 950-970 DEG C of insulation 10s, 380-410 DEG C of tempering;
Carry out after heat treatment workpiece cutting,
Carry out carbonitriding heat treatment to workpiece surface after cutting, strong infiltrate journey: temperature 950-980 DEG C of scope, carbon potential and nitrogen gesture take level Four step, carbon potential 0.4-0.6%, nitrogen gesture 1.2-1.4%, insulation 3h, then raise carbon potential to 0.7-0.9%, reduce nitrogen gesture to 1.0-1.1%, insulation 2h, raise carbon potential again to 1.0-1.1%, reduce nitrogen gesture to 0.7-0.9%, insulation 2h, finally raise carbon potential to 1.2-1.6%, reduce nitrogen gesture to 0.4-0.5%, insulation 2.5h; Spread after oozing by force, diffusion process: control furnace temperature and be down to 900-920 DEG C, insulation 3h, is cooled to 820-850 DEG C, insulation 4h, and diffusion process carbon-potential control is between 1.2 ~ 1.3%, and nitrogen potential control is between 1.0 ~ 1.1%; Air cooling is to room temperature; Quench after diffusion, quenching process: carry out oil quenching at 850 DEG C, Oil-temperature control is at 70 DEG C; Cleaning process: remove component surface oil stain, rinse liquid temperature controls at 50 DEG C; Tempering: carry out low-temperature tempering, controls furnace temperature 180 DEG C, time 150-200 minute,
To the processing of workpiece conical surface grinding,
Carry out conical surface built-up welding to workpiece after conical surface grinding processing, conical surface bead-welding technology is: 150-200 DEG C of preheating, nontransferred arc voltage 20V, nontransferred arc electric current 50A; The distance 10-12mm of nozzle and workpiece surface, has welded rear Slow cooling; Weld overlay materials is: Co 38.5-40%, Ni 0.68-0.95%, B 0.1-0.25%, Ta 0.2-0.6%, Sn 1-3%, Gd 0.12-0.26%, C 0.05-0.13%, and surplus is W;
To workpiece surface polishing,
To workpiece surface coated with tungsten carbide coating after workpiece surface polishing, coating thickness is about 10-15 micron; Afterwards at the outer covering aluminum oxide coating of tungsten carbide coating, coating thickness is about 5-10 micron, obtains intake valve.
2. a kind of cylinder cover of automobile engine as claimed in claim 1, inlet valve seat ring chemical element consists of (weight percentage): C:0.06 ﹪, Si:2 ﹪, Cu:1 ﹪, W:0.8 ﹪, Cr:0.4 ﹪, Ni:0.2 ﹪, Nb:0.2 ﹪, V:0.1 ﹪, Ti:0.07 ﹪, Al:0.05 ﹪, Mn:0.02 ﹪, Mg:0.02 ﹪, Mo:0.01 ﹪, Ce:0.01 ﹪, surplus is Fe and inevitable impurity.
3. a kind of cylinder cover of automobile engine as claimed in claim 1, inlet valve seat ring chemical element consists of (weight percentage): C:0.07 ﹪, Si:3 ﹪, Cu:2 ﹪, W:0.9 ﹪, Cr:0.5 ﹪, Ni:0.3 ﹪, Nb:0.3 ﹪, V:0.2 ﹪, Ti:0.08 ﹪, Al:0.06 ﹪, Mn:0.03 ﹪, Mg:0.03 ﹪, Mo:0.02 ﹪, Ce:0.02 ﹪, surplus is Fe and inevitable impurity.
4. a kind of cylinder cover of automobile engine as claimed in claim 1, inlet valve seat ring chemical element consists of (weight percentage): C:0.065 ﹪, Si:2.5 ﹪, Cu:1.5 ﹪, W:0.85 ﹪, Cr:0.45 ﹪, Ni:0.25 ﹪, Nb:0.25 ﹪, V:0.15 ﹪, Ti:0.075 ﹪, Al:0.055 ﹪, Mn:0.025 ﹪, Mg:0.025 ﹪, Mo:0.015 ﹪, Ce:0.015 ﹪, surplus is Fe and inevitable impurity.
5. a kind of cylinder cover of automobile engine as claimed in claim 1, intake valve material of main part is: C0.13%, Si3.4%, Mn0.8%, P≤0.035%, S≤0.035%, Ti1.2%, Cr 5%, W 3%, Ni2.8%, Co 1%, and surplus is Fe and inevitable impurity.
6. a kind of cylinder cover of automobile engine as claimed in claim 1, intake valve material of main part is: C 0.27%, Si 4%, Mn 0.95%, P≤0.035%, S≤0.035%, Ti 1.9%, Cr 7%, W 4%, Ni 3.24%, Co 1.2%, surplus is Fe and inevitable impurity.
7. a kind of cylinder cover of automobile engine as claimed in claim 1, intake valve material of main part is: C0.2%, Si 3.7%, Mn 0.9%, P≤0.035%, S≤0.035%, Ti 1.5%, Cr 6%, W 3.5%, Ni 3%, Co 1.1%, surplus is Fe and inevitable impurity.
8. a kind of Motor Engine Cylinder lid as claimed in claim 8, weld overlay materials is: Co 38.5%, Ni 0.68%, B 0.1%, Ta 0.2%, Sn 1%, Gd 0.12%, C 0.05%, surplus is W.
9. a kind of Motor Engine Cylinder lid as claimed in claim 1, weld overlay materials is: Co 40%, Ni 0.95%, B 0.25%, Ta 0.6%, Sn 3%, Gd 0.26%, C 0.13%, surplus is W.
10. a kind of cylinder cover of automobile engine as claimed in claim 1, weld overlay materials is: Co 39%, Ni 0.8%, B 0.2%, Ta 0.4%, Sn 2%, Gd 0.2%, C 0.1%, surplus is W.
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* Cited by examiner, † Cited by third party
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CN105154894A (en) * 2015-09-29 2015-12-16 山东聊城德润机电科技发展有限公司 Valve bush carbonitriding thermal treatment process for high-pressure common rail
CN105586533A (en) * 2015-12-23 2016-05-18 宝鼎科技股份有限公司 High-performance steam cylinder cover for large low-speed diesel engine and manufacturing process
CN106435346A (en) * 2016-10-24 2017-02-22 马鞍山顺发机械制造有限公司 Casting material of automobile engine cylinder block
CN106498272A (en) * 2016-10-24 2017-03-15 马鞍山顺发机械制造有限公司 A kind of automobile engine cylinder head founding materials
CN107780991A (en) * 2017-10-25 2018-03-09 江苏金山动力科技有限公司 A kind of internal combustion engine air outlet valve and its preparation technology
CN107794462A (en) * 2017-10-25 2018-03-13 江苏金山动力科技有限公司 A kind of internal combustion engine inlet valve and its preparation technology
CN108225780A (en) * 2017-12-18 2018-06-29 中国第汽车股份有限公司 A kind of engine valve retainer and temp measuring method
CN112301286A (en) * 2020-11-03 2021-02-02 安福锦湖(湖南)气门有限公司 Automobile engine exhaust valve material and preparation method thereof

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CN107780991A (en) * 2017-10-25 2018-03-09 江苏金山动力科技有限公司 A kind of internal combustion engine air outlet valve and its preparation technology
CN107794462A (en) * 2017-10-25 2018-03-13 江苏金山动力科技有限公司 A kind of internal combustion engine inlet valve and its preparation technology
CN107794462B (en) * 2017-10-25 2020-11-27 镇江维纳特气门科技有限公司 Preparation process of intake valve for internal combustion engine
CN108225780A (en) * 2017-12-18 2018-06-29 中国第汽车股份有限公司 A kind of engine valve retainer and temp measuring method
CN112301286A (en) * 2020-11-03 2021-02-02 安福锦湖(湖南)气门有限公司 Automobile engine exhaust valve material and preparation method thereof

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