CN112343683A - Direct-injection self-suction automobile engine intake valve seat ring and manufacturing method thereof - Google Patents

Direct-injection self-suction automobile engine intake valve seat ring and manufacturing method thereof Download PDF

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Publication number
CN112343683A
CN112343683A CN202011221840.2A CN202011221840A CN112343683A CN 112343683 A CN112343683 A CN 112343683A CN 202011221840 A CN202011221840 A CN 202011221840A CN 112343683 A CN112343683 A CN 112343683A
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China
Prior art keywords
percent
valve seat
seat ring
intake valve
temperature
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CN202011221840.2A
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Inventor
李士红
毛兰英
阙湘峰
肖耀平
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Anfu Jinhu Hunan Valve Co ltd
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Anfu Jinhu Hunan Valve Co ltd
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Priority to CN202011221840.2A priority Critical patent/CN112343683A/en
Publication of CN112343683A publication Critical patent/CN112343683A/en
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    • 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
    • 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
    • B23P15/001—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass valves or valve housings
    • 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
    • C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
    • 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
    • C21D6/004—Heat treatment of ferrous alloys containing Cr and Ni
    • 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
    • C21D6/005—Heat treatment of ferrous alloys containing Mn
    • 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
    • C21D6/007—Heat treatment of ferrous alloys containing Co
    • 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
    • C21D6/008—Heat treatment of ferrous alloys containing Si
    • 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
    • C21D9/40—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rings; for bearing races
    • 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
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/46—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
    • 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
    • C22C38/56—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.7% by weight of carbon
    • 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

Abstract

The invention discloses an intake valve seat ring of a direct injection self-absorption automobile engine, which comprises the following components in percentage by mass: c: 1.2-1.8%; si: 0.5-0.8%; w: 0.5-2.0%; mn: 0.4 to 1.0 percent; ni: 0.6-2.2%; nb: 0.1 to 0.3 percent; cr: 2.0 to 3.5 percent; mo: 2.0 to 6.0 percent; co: 2.5 to 6.0 percent; cu: 0-10%, V: 0.2-1.2%; ti: 0.05-0.10%; ce: 0.01-0.02% and the balance of Fe; the method comprises the following steps: preparing raw materials according to a proportion, and carrying out ball milling in a ball mill; smelting, forging and extruding the mixed raw materials to obtain an intake valve seat ring blank; pre-sintering in a sintering furnace, putting the sintered material into liquid nitrogen for deep cooling for 5 to 10 minutes, raising the temperature to room temperature in the air, and finely machining; coating a wear-resistant high-temperature-resistant coating on the surface of the intake valve seat ring to obtain the intake valve seat ring; the intake valve seat ring obtained by the invention has good high-temperature resistance, wear resistance and difficult deformation effects; the seat ring disclosed by the invention is wide in application range and long in service life, so that the requirements of enterprises on the seat ring of the intake valve can be well met, and the development of the enterprises is facilitated.

Description

Direct-injection self-suction automobile engine intake valve seat ring and manufacturing method thereof
Technical Field
The invention relates to the technical field of intake valve seat rings of direct-injection self-absorption automobile engines, in particular to an intake valve seat ring of a direct-injection self-absorption automobile engine and a manufacturing method thereof.
Background
The working temperature of the air inlet valve seat ring of the engine can reach 200-400 ℃, the air inlet valve seat ring works at a higher temperature for a long time, the hardness of the air inlet valve seat ring is reduced to generate deformation, the air inlet valve is repeatedly impacted at high frequency, the air inlet valve is continuously opened and closed to accelerate the abrasion of the air inlet valve seat ring, the high-temperature fuel gas is continuously eroded under the combined action of oxidation, vulcanization and the like, the service life of the air inlet valve seat ring is reduced, the environmental protection requirement is continuously strict, the lead-free environmental protection fuel oil, alcohol fuel and CNG fuel are continuously popularized, lead can be continuously reduced or completely disappeared with the generation of lead oxide, lead sulfate and the like with the lubricating effect with sulfur, phosphorus and the like in the fuel, the lubricating effect and the anti-friction effect of lead are reduced or are not existed, and meanwhile, along with the improvement.
Disclosure of Invention
The invention aims to provide an intake valve seat ring of a direct-injection self-absorption automobile engine and a manufacturing method thereof, and solves the problems of high temperature, abrasion, deformation and the like.
The invention is realized in such a way that the intake valve seat ring of the direct injection self-absorption automobile engine comprises the following components in percentage by mass:
c: 1.2-1.8%; si: 0.5-0.8%; w: 0.5-2.0%; mn: 0.4 to 1.0 percent; ni: 0.6-2.2%; nb: 0.1 to 0.3 percent; cr: 2.0 to 3.5 percent; mo: 2.0 to 6.0 percent; co: 2.5 to 6.0 percent; cu: 0-10%, V: 0.2-1.2%; ti: 0.05-0.10%; ce: 0.01-0.02% and the balance Fe.
The further technical scheme of the invention is as follows: the intake valve seat ring comprises the following components in percentage by mass:
c: 1.5 to 1.8 percent; si: 0.5-0.8%; w: 1.0 to 1.6 percent; mn: 0.5-0.8%; ni: 1.0-2.0%; nb: 0.1 to 0.3 percent; cr: 2.2-3.0%; mo: 3.0 to 5.0 percent; co: 3.0 to 5.0 percent; cu: 2-8%, V: 0.6 to 1.0 percent; ti: 0.06-0.08%; ce: 0.01-0.02% and the balance Fe.
A manufacturing method of an intake valve seat ring of a direct-injection self-absorption automobile engine comprises the following steps:
step one, preparing raw materials according to the proportion, and carrying out ball milling in a ball mill until the average particle size is 40-60 mu m;
step two, smelting, forging and extruding the mixed raw materials to obtain an intake valve seat ring blank;
thirdly, placing the inlet valve seat ring blank into a sintering furnace in an inert gas protection atmosphere for presintering, adopting a step sintering mode for sintering treatment, placing the sintered blank into liquid nitrogen for deep cooling treatment for 5-10 minutes, and raising the temperature to room temperature in the air; then carrying out fine machining;
and step four, coating a wear-resistant high-temperature-resistant coating on the surface of the intake valve seat ring after the fine machining, wherein the thickness of the coating is 5-10 microns, and thus obtaining the intake valve seat ring.
The further technical scheme of the invention is as follows: in the first step, the ball milling rotation speed is 120-140r/min, the ball-material ratio is 10-15:1, and the ball milling time is 0.5-1 h.
The further technical scheme of the invention is as follows: the smelting in the step two is as follows: smelting by a vacuum consumable arc melting method, casting into an ingot, heating the ingot to 1100-1200 ℃, and preserving heat for 1-2 hours.
The further technical scheme of the invention is as follows: the forging in the second step is as follows: forging the cast ingot by using a forging machine, wherein the forging ratio is 1.2-1.5; the initial forging temperature is 980-1050 ℃, and the final forging temperature is 800-850 ℃; then cooling to 700-720 ℃, preserving heat for 1-2 hours, cooling to room temperature, reheating to 780-850 ℃, preserving heat for 0.5-1 hours, and then using a forging machine to forge again, wherein the forging ratio is 1.0-1.3; the initial forging temperature is 800-850 ℃, and the final forging temperature is 700-720 ℃; then cooling to 680-700 ℃, preserving the temperature for 0.5-1 h, and cooling to room temperature to obtain a forging blank.
The further technical scheme of the invention is as follows: the extrusion molding in the second step comprises the following steps: the forging blank is extruded at the temperature of 1100-1200 ℃, the extrusion speed is 40-50mm/s, and the extrusion ratio is 5-8.
The further technical scheme of the invention is as follows: and in the third step, the inert gas is argon.
The further technical scheme of the invention is as follows: the step sintering mode adopted in the third step is as follows: the temperature reaches 280-.
The further technical scheme of the invention is as follows: the wear-resistant high-temperature-resistant coating in the fourth step comprises nickel, chromium and tungsten which respectively account for the total weight in percentage by weight: 12 to 18 percent, 6 to 12 percent and 70 to 82 percent.
The invention has the beneficial effects that: the intake valve seat ring obtained by the invention has good high-temperature resistance, wear resistance and difficult deformation effects; the seat ring disclosed by the invention is wide in application range and long in service life, so that the requirements of enterprises on the seat ring of the intake valve can be well met, and the development of the enterprises is facilitated.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.
The intake valve seat ring of the direct-injection self-absorption automobile engine comprises the following components in percentage by mass:
c: 1.2-1.8%; si: 0.5-0.8%; w: 0.5-2.0%; mn: 0.4 to 1.0 percent; ni: 0.6-2.2%; nb: 0.1 to 0.3 percent; cr: 2.0 to 3.5 percent; mo: 2.0 to 6.0 percent; co: 2.5 to 6.0 percent; cu: 0-10%, V: 0.2-1.2%; ti: 0.05-0.10%; ce: 0.01-0.02% and the balance Fe.
The intake valve seat ring comprises the following components in percentage by mass:
c: 1.5 to 1.8 percent; si: 0.5-0.8%; w: 1.0 to 1.6 percent; mn: 0.5-0.8%; ni: 1.0-2.0%; nb: 0.1 to 0.3 percent; cr: 2.2-3.0%; mo: 3.0 to 5.0 percent; co: 3.0 to 5.0 percent; cu: 2-8%, V: 0.6 to 1.0 percent; ti: 0.06-0.08%; ce: 0.01-0.02% and the balance Fe.
A manufacturing method of an intake valve seat ring of a direct-injection self-absorption automobile engine comprises the following steps:
step one, preparing raw materials according to the proportion, and carrying out ball milling in a ball mill until the average particle size is 40-60 mu m;
step two, smelting, forging and extruding the mixed raw materials to obtain an intake valve seat ring blank;
thirdly, placing the inlet valve seat ring blank into a sintering furnace in an inert gas protection atmosphere for presintering, adopting a step sintering mode for sintering treatment, placing the sintered blank into liquid nitrogen for deep cooling treatment for 5-10 minutes, and raising the temperature to room temperature in the air; then carrying out fine machining;
and step four, coating a wear-resistant high-temperature-resistant coating on the surface of the intake valve seat ring after the fine machining, wherein the thickness of the coating is 5-10 microns, and thus obtaining the intake valve seat ring.
In the first step, the ball milling rotation speed is 120-140r/min, the ball-material ratio is 10-15:1, and the ball milling time is 0.5-1 h.
The smelting in the step two is as follows: smelting by a vacuum consumable arc melting method, casting into an ingot, heating the ingot to 1100-1200 ℃, and preserving heat for 1-2 hours.
The forging in the second step is as follows: forging the cast ingot by using a forging machine, wherein the forging ratio is 1.2-1.5; the initial forging temperature is 980-1050 ℃, and the final forging temperature is 800-850 ℃; then cooling to 700-720 ℃, preserving heat for 1-2 hours, cooling to room temperature, reheating to 780-850 ℃, preserving heat for 0.5-1 hours, and then using a forging machine to forge again, wherein the forging ratio is 1.0-1.3; the initial forging temperature is 800-850 ℃, and the final forging temperature is 700-720 ℃; then cooling to 680-700 ℃, preserving the temperature for 0.5-1 h, and cooling to room temperature to obtain a forging blank.
The extrusion molding in the second step comprises the following steps: the forging blank is extruded at the temperature of 1100-1200 ℃, the extrusion speed is 40-50mm/s, and the extrusion ratio is 5-8.
And in the third step, the inert gas is argon.
The step sintering mode adopted in the third step is as follows: the temperature reaches 280-.
The wear-resistant high-temperature-resistant coating in the fourth step comprises nickel, chromium and tungsten which respectively account for the total weight in percentage by weight: 12 to 18 percent, 6 to 12 percent and 70 to 82 percent.
The first embodiment is as follows:
the intake valve seat ring of the direct-injection self-absorption automobile engine comprises the following components in percentage by mass:
c: 1.5 percent; si: 0.5-0.8%; w: 1.0 percent; mn: 0.5 percent; ni: 1.0 percent; nb: 0.1 percent; cr: 2.2 percent; mo: 3.0 percent; co: 3.0 percent; cu: 2%, V: 0.6 percent; ti: 0.06 percent; ce: 0.01 percent, and the balance being Fe.
A manufacturing method of an intake valve seat ring of a direct-injection self-absorption automobile engine comprises the following steps:
step one, preparing raw materials according to the proportion, and carrying out ball milling in a ball mill until the average particle size is 40 mu m;
step two, smelting, forging and extruding the mixed raw materials to obtain an intake valve seat ring blank;
thirdly, placing the inlet valve seat ring blank into a sintering furnace in an inert gas protection atmosphere for presintering, sintering in a step sintering mode, placing the sintered blank into liquid nitrogen for deep cooling for 5 minutes, and raising the temperature to room temperature in the air; then carrying out fine machining;
and step four, coating a wear-resistant high-temperature-resistant coating on the surface of the intake valve seat ring after the fine machining, wherein the thickness of the coating is 5 microns, and thus obtaining the intake valve seat ring.
In the first step, the ball milling speed is 120r/min, the ball-material ratio is 10:1, and the ball milling time is 0.5 h.
The smelting in the step two is as follows: smelting by a vacuum consumable arc melting method, casting into an ingot, heating the ingot to 1100 ℃, and preserving heat for 1 hour.
The forging in the second step is as follows: forging the cast ingot by using a forging machine, wherein the forging ratio is 1.2; the initial forging temperature is 980 ℃, and the final forging temperature is 800 ℃; then cooling to 700 ℃, preserving heat for 1 hour, cooling to room temperature, reheating to 780 ℃, preserving heat for 0.5 hour, and then forging again by using a forging machine, wherein the forging ratio is 1.0; the initial forging temperature is 800 ℃, and the final forging temperature is 700 ℃; then cooling to 680 ℃, preserving heat for 0.5 hour, and cooling to room temperature to obtain a forging blank.
The extrusion molding in the second step comprises the following steps: the forged billet was extruded at 1100 ℃ at an extrusion speed of 40mm/s and an extrusion ratio of 5.
And in the third step, the inert gas is argon.
The step sintering mode adopted in the third step is as follows: and (3) preserving heat for 2 hours at the temperature of 280 ℃, for 2 hours at the temperature of 350 ℃, for 2 hours at the temperature of 650 ℃, for 2 hours at the temperature of 1100 ℃, and finally, controlling the temperature to 1350 ℃ and sintering for 3 hours.
The wear-resistant high-temperature-resistant coating in the fourth step comprises nickel, chromium and tungsten which respectively account for the total weight in percentage by weight: 12%, 10% and 78%.
Example two:
the intake valve seat ring of the direct-injection self-absorption automobile engine comprises the following components in percentage by mass:
c: 1.6 percent; si: 0.7 percent; w: 1.2 percent; mn: 0.6 percent; ni: 1.5 percent; nb: 0.2 percent; cr: 2.5 percent; mo: 4.0 percent; co: 4.0 percent; cu: 6%, V: 0.8 percent; ti: 0.07 percent; ce: 0.01 percent, and the balance being Fe.
A manufacturing method of an intake valve seat ring of a direct-injection self-absorption automobile engine comprises the following steps:
step one, preparing raw materials according to the proportion, and carrying out ball milling in a ball mill until the average particle size is 50 microns;
step two, smelting, forging and extruding the mixed raw materials to obtain an intake valve seat ring blank;
thirdly, placing the inlet valve seat ring blank into a sintering furnace in an inert gas protection atmosphere for presintering, adopting a step sintering mode for sintering treatment, placing the sintered body into liquid nitrogen for deep cooling treatment for 8 minutes, and raising the temperature to room temperature in the air; then carrying out fine machining;
and step four, coating a wear-resistant high-temperature-resistant coating on the surface of the intake valve seat ring after the fine machining, wherein the thickness of the coating is 8 microns, and thus obtaining the intake valve seat ring.
In the first step, the ball milling speed is 130r/min, the ball-material ratio is 12:1, and the ball milling time is 1 h.
The smelting in the step two is as follows: smelting by a vacuum consumable arc melting method, casting into an ingot, heating the ingot to 1150 ℃, and preserving heat for 2 hours.
The forging in the second step is as follows: forging the cast ingot by using a forging machine, wherein the forging ratio is 1.3; the initial forging temperature is 1000 ℃, and the final forging temperature is 820 ℃; then, cooling to 710 ℃, preserving heat for 1 hour, cooling to room temperature, reheating to 800 ℃, preserving heat for 1 hour, and then forging again by using a forging machine, wherein the forging ratio is 1.2; the initial forging temperature is 820 ℃, and the final forging temperature is 710 ℃; and then cooling to 690 ℃, preserving the heat for 1 hour, and cooling to room temperature to obtain a forging blank.
The extrusion molding in the second step comprises the following steps: the forged billet was extruded at 1150 ℃ at an extrusion speed of 45mm/s and an extrusion ratio of 6.
And in the third step, the inert gas is argon.
The step sintering mode adopted in the third step is as follows: and (3) preserving heat for 3 hours at the temperature of 300 ℃, preserving heat for 3 hours at the temperature of 400 ℃, preserving heat for 3 hours at the temperature of 700 ℃, preserving heat for 3 hours at the temperature of 1150 ℃, finally controlling the temperature at 1400 ℃ and sintering for 3 hours.
The wear-resistant high-temperature-resistant coating in the fourth step comprises nickel, chromium and tungsten which respectively account for the total weight in percentage by weight: 15%, 10%, 75%.
Example three:
the intake valve seat ring of the direct-injection self-absorption automobile engine comprises the following components in percentage by mass:
c: 1.8 percent; si: 0.8 percent; w: 1.6 percent; mn: 0.8 percent; ni: 2.0 percent; nb: 0.3 percent; cr: 3.0 percent; mo: 5.0 percent; co: 5.0 percent; cu: 8%, V: 1.0 percent; ti: 0.08 percent; ce: 0.02% and the balance Fe.
A manufacturing method of an intake valve seat ring of a direct-injection self-absorption automobile engine comprises the following steps:
step one, preparing raw materials according to the proportion, and carrying out ball milling in a ball mill until the average particle size is 60 mu m;
step two, smelting, forging and extruding the mixed raw materials to obtain an intake valve seat ring blank;
thirdly, placing the inlet valve seat ring blank into a sintering furnace in an inert gas protection atmosphere for presintering, adopting a step sintering mode for sintering treatment, placing the sintered body into liquid nitrogen for deep cooling treatment for 10 minutes, and raising the temperature to room temperature in the air; then carrying out fine machining;
and step four, coating a wear-resistant high-temperature-resistant coating on the surface of the intake valve seat ring after the fine machining, wherein the thickness of the coating is 10 microns, and thus obtaining the intake valve seat ring.
In the first step, the ball milling speed is 140r/min, the ball-material ratio is 15:1, and the ball milling time is 1 h.
The smelting in the step two is as follows: smelting by a vacuum consumable arc melting method, casting into an ingot, heating the ingot to 1200 ℃, and preserving heat for 2 hours.
The forging in the second step is as follows: forging the cast ingot by using a forging machine, wherein the forging ratio is 1.5; the initial forging temperature is 1050 ℃, and the final forging temperature is 850 ℃; then cooling to 720 ℃, preserving heat for 2 hours, cooling to room temperature, reheating to 850 ℃, preserving heat for 1 hour, and then forging again by using a forging machine, wherein the forging ratio is 1.3; the initial forging temperature is 850 ℃, and the final forging temperature is 720 ℃; and then cooling to 700 ℃, preserving the heat for 1 hour, and cooling to room temperature to obtain a forging blank.
The extrusion molding in the second step comprises the following steps: the forged billet was extruded at 1200 ℃ at an extrusion speed of 50mm/s and an extrusion ratio of 8.
And in the third step, the inert gas is argon.
The step sintering mode adopted in the third step is as follows: and (3) preserving heat for 3 hours at the temperature of 320 ℃, preserving heat for 3 hours at the temperature of 450 ℃, preserving heat for 3 hours at the temperature of 800 ℃, preserving heat for 3 hours at the temperature of 1200 ℃, finally controlling the temperature at 1400 ℃ and sintering for 4 hours.
The wear-resistant high-temperature-resistant coating in the fourth step comprises nickel, chromium and tungsten which respectively account for the total weight in percentage by weight: 14%, 6%, 80%.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. The utility model provides a direct spout from inhaling automobile engine intake valve seat circle which characterized in that: the intake valve seat ring comprises the following components in percentage by mass:
c: 1.2-1.8%; si: 0.5-0.8%; w: 0.5-2.0%; mn: 0.4 to 1.0 percent; ni: 0.6-2.2%; nb: 0.1 to 0.3 percent; cr: 2.0 to 3.5 percent; mo: 2.0 to 6.0 percent; co: 2.5 to 6.0 percent; cu: 0-10%, V: 0.2-1.2%; ti: 0.05-0.10%; ce: 0.01-0.02% and the balance Fe.
2. The intake valve seat insert of a direct injection self-priming automotive engine according to claim 1, characterized in that: the intake valve seat ring comprises the following components in percentage by mass:
c: 1.5 to 1.8 percent; si: 0.5-0.8%; w: 1.0 to 1.6 percent; mn: 0.5-0.8%; ni: 1.0-2.0%; nb: 0.1 to 0.3 percent; cr: 2.2-3.0%; mo: 3.0 to 5.0 percent; co: 3.0 to 5.0 percent; cu: 2-8%, V: 0.6 to 1.0 percent; ti: 0.06-0.08%; ce: 0.01-0.02% and the balance Fe.
3. The method for manufacturing the intake valve seat ring of the direct injection self-priming automobile engine according to any one of claims 1 to 2, characterized in that: the manufacturing method comprises the following steps:
step one, preparing raw materials according to the proportion, and carrying out ball milling in a ball mill until the average particle size is 40-60 mu m;
step two, smelting, forging and extruding the mixed raw materials to obtain an intake valve seat ring blank;
thirdly, placing the inlet valve seat ring blank into a sintering furnace in an inert gas protection atmosphere for presintering, adopting a step sintering mode for sintering treatment, placing the sintered blank into liquid nitrogen for deep cooling treatment for 5-10 minutes, and raising the temperature to room temperature in the air; then carrying out fine machining;
and step four, coating a wear-resistant high-temperature-resistant coating on the surface of the intake valve seat ring after the fine machining, wherein the thickness of the coating is 5-10 microns, and thus obtaining the intake valve seat ring.
4. The method for manufacturing the intake valve seat ring of the direct-injection self-priming automobile engine according to claim 3, is characterized in that: in the first step, the ball milling rotation speed is 120-140r/min, the ball-material ratio is 10-15:1, and the ball milling time is 0.5-1 h.
5. The method for manufacturing the intake valve seat ring of the direct-injection self-priming automobile engine according to claim 3, is characterized in that: the smelting in the step two is as follows: smelting by a vacuum consumable arc melting method, casting into an ingot, heating the ingot to 1100-1200 ℃, and preserving heat for 1-2 hours.
6. The method for manufacturing the intake valve seat ring of the direct-injection self-priming automobile engine according to claim 3, is characterized in that: the forging in the second step is as follows: forging the cast ingot by using a forging machine, wherein the forging ratio is 1.2-1.5; the initial forging temperature is 980-1050 ℃, and the final forging temperature is 800-850 ℃; then cooling to 700-720 ℃, preserving heat for 1-2 hours, cooling to room temperature, reheating to 780-850 ℃, preserving heat for 0.5-1 hours, and then using a forging machine to forge again, wherein the forging ratio is 1.0-1.3; the initial forging temperature is 800-850 ℃, and the final forging temperature is 700-720 ℃; then cooling to 680-700 ℃, preserving the temperature for 0.5-1 h, and cooling to room temperature to obtain a forging blank.
7. The method for manufacturing the intake valve seat ring of the direct-injection self-priming automobile engine according to claim 3, is characterized in that: the extrusion molding in the second step comprises the following steps: the forging blank is extruded at the temperature of 1100-1200 ℃, the extrusion speed is 40-50mm/s, and the extrusion ratio is 5-8.
8. The method for manufacturing the intake valve seat ring of the direct-injection self-priming automobile engine according to claim 3, is characterized in that: and in the third step, the inert gas is argon.
9. The method for manufacturing the intake valve seat ring of the direct-injection self-priming automobile engine according to claim 3, is characterized in that: the step sintering mode adopted in the third step is as follows: the temperature reaches 280-.
10. The method for manufacturing the intake valve seat ring of the direct-injection self-priming automobile engine according to claim 3, is characterized in that: the wear-resistant high-temperature-resistant coating in the fourth step comprises nickel, chromium and tungsten which respectively account for the total weight in percentage by weight: 12 to 18 percent, 6 to 12 percent and 70 to 82 percent.
CN202011221840.2A 2020-11-05 2020-11-05 Direct-injection self-suction automobile engine intake valve seat ring and manufacturing method thereof Pending CN112343683A (en)

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