CN109396443A - A kind of diesel engine powder metallurgy valve seat - Google Patents

A kind of diesel engine powder metallurgy valve seat Download PDF

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Publication number
CN109396443A
CN109396443A CN201811283358.4A CN201811283358A CN109396443A CN 109396443 A CN109396443 A CN 109396443A CN 201811283358 A CN201811283358 A CN 201811283358A CN 109396443 A CN109396443 A CN 109396443A
Authority
CN
China
Prior art keywords
diesel engine
powder metallurgy
valve seat
valve seating
valve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201811283358.4A
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Chinese (zh)
Inventor
奚杰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
YIZHENG CHANGDA POWDER METALLURGY PRODUCT CO Ltd
Original Assignee
YIZHENG CHANGDA POWDER METALLURGY PRODUCT CO Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by YIZHENG CHANGDA POWDER METALLURGY PRODUCT CO Ltd filed Critical YIZHENG CHANGDA POWDER METALLURGY PRODUCT CO Ltd
Priority to CN201811283358.4A priority Critical patent/CN109396443A/en
Publication of CN109396443A publication Critical patent/CN109396443A/en
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
    • B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
    • B22F1/105—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material containing inorganic lubricating or binding agents, e.g. metal salts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F9/02—Making metallic powder or suspensions thereof using physical processes
    • B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
    • B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
    • B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
    • 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
    • C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
    • 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

Abstract

The invention discloses a kind of diesel engine powder metallurgy valve seats, belong to metallurgical technology field, its chemical component and its content (wt%) are as follows: C:0.7-1.5%, Mo:4.5-9.5%, Cr:5.3-9.0%, Ti:0.2-1.0%, Ni:1.0-4.0%, Cu:10-20%, zinc stearate: 0-1%, surplus Fe.Valve seating of the invention is to be incorporated a certain amount of chromium, molybdenum, nickel, Titanium Powder later first by base iron using basis powder made of water atomization, pass through mechanical mixture, compacting, sintering in the preparation.The physical properties such as valve seating calorific intensity and wearability and mechanical performance are made to be significantly improved.

Description

A kind of diesel engine powder metallurgy valve seat
Technical field
The invention belongs to metallurgical technology fields, will give alloying powder and are suppressed, are sintered and machined, and automobile zero is made The field of metallurgy of component.
Background technique
Valve seating is the important component in engine valve actuating mechanism, and the important sealing friction that partners of it and valve is paid, and is sent out When motivation works, valve seating is impacted by valve, and the washing away of high temperature (530~870 DEG C) burning gases, burn into and burning produce The abrasion of object, dust in air, in addition also by hot cold stress alternating action, it is easily deformed, scaling loss, even disconnected It splits, therefore not only requires Materials for Valve Seat wear-resisting, corrosion-resistant, resistant to high temperatures, also require certain radial crushing strength.
Engine valve and valve seating are in harsh heating power, work under chemistry and mechanical force situation, subject height and answer Power (engine maximum combustion pressure is up to 20MPa), elevated operating temperature (valve disc to planar central is up to 870 DEG C) and corrosive environment (high-temperature fuel gas corrodes, vulcanizes) corrosion and oxidation.
According to the working environment of above-mentioned valve seating, to guarantee its functional reliability and service life, in different building rings Border and in the case where using different fuel, it is necessary to developmental research new material and new process as early as possible.
Summary of the invention
Technical problem solved by the invention is to provide a kind of diesel engine powder metallurgy valve seat.Product of the present invention resistance to compression Intensity is high, has wear-resisting, corrosion-resistant, resistant to high temperatures and shock resistance.It is particularly suitable for the needs of height performance diesel engine.
The purpose of the present invention is what is be achieved through the following technical solutions, a kind of diesel engine powder metallurgy valve seat, chemistry at Point and its content (wt%) are as follows: C:0.7~1.5%, Mo:4.5~9.5%, Cr:5.3~9.0%, Ti:0.2~1.0%, Ni: 1.0~4.0%, Cu:10-20%, zinc stearate: 0~1%, surplus Fe.
Preferably, the chemical component of the diesel engine powder metallurgy valve seat and its content (wt%) are as follows: C:0.7~ 1.2%, Mo:4.2~5.6%, Cr:4.5~8.6%, Ti:0.3~0.9%, Ni:1.5~3.7%, Cu:15-19.6%, hard Resin acid zinc: 0~1%, surplus Fe.Preferably, the chemical component and its content (wt%) of the valve seating are as follows: C:0.8%, Mo:5.3%, Cr:6.5%, Ni:1.5%, Ti:0.5%, Cu:15%, zinc stearate: 0~1%, surplus Fe.
Preferably, the chemical component and its content (wt%) of the valve seating are as follows: C:1.1%, Mo:8.1%, Cr: 7.1%, Ni:2.6%, Ti:0.7%, Cu:17%, zinc stearate: 0~1%, surplus Fe.
Preferably, the chemical component and its content (wt%) of the valve seating are as follows: C:1.2%, Mo:9.3%, Cr: 8.5%, Ni:3.8%, Ti:0.9%, Cu:19%, zinc stearate: 0~1%, surplus Fe.
Compared with existing powder metallurgy valve seat technology, the invention has the following advantages:
The first, the present invention by improve hydraulic atomized powder-making technique and rationally add the chromium of certain content, molybdenum, nickel, The high alloy powder such as titanium makes the physical properties such as valve seating calorific intensity and wearability and machinery by mechanical mixture, compacting, sintering Performance is significantly improved.Valve seating sintered blank hardness is HRC40~50, metallographic structure are as follows: martensite+bainite+A is residual+ Hard phase, density >=7.6g/cm3.It can get equally distributed hard phase on powerful alloy substrate after sintering, greatly improve The abrasion resistance, heat resistance of product, corrosion resistance and radial crushing strength.
The second, valve seating is formd through sintering in the relatively soft institutional framework for substantially inlaying Hard Inclusion, hence it is evident that is mentioned The high wearability of valve seating.6110/125 diesel engine of this patent product has passed through rack reliability test and has shown: product It is able to satisfy requirement, can be applied to diesel engine.
Third, it is of the invention it is used for valve seat be chromium, molybdenum, nickel, titanium alloy material, the sample of different titaniferous amounts is carried out Titanium strengthening mechanism in Fe Cr Mo alloy has also been inquired into the test of the high-temperature behaviors such as high temperature hardness, high temperature corrosion, coefficient of thermal expansion, A large amount of test result shows: various performances of the invention have reached the needs of high-performance diesel engine.
Specific embodiment
A kind of diesel engine powder metallurgy valve seat, chemical component and its content (wt%) are as follows: C:0.7~1.5%, Mo:4.5 ~9.5%, Cr:5.3~9.0%, Ti:0.2~1.0%, Ni:1.0~4.0%, Cu:10-20%, zinc stearate: 0~1%, Surplus is Fe；
Valve seating of the invention, in the preparation first by base iron using basis powder made of water atomization, Zhi Houpei Enter a certain amount of chromium, molybdenum, nickel, Titanium Powder, 0.8~1.2% C powder and 0.8 zinc stearate.By 30 minutes mechanical mixtures, By raw embryo merging push-down sintering furnace sintering after compacting, in ammonia dissolving atmosphere, 1100~1150 DEG C of temperature are sintered, valve Seat sintered blank hardness HRC >=35, then by -150 DEG C of freezing processings, sintered material hardness is HRC40~50 after 200 DEG C of tempering, Density >=7.6g/cm3,Metallographic structure be martensite+bainite+A it is residual+hard phase, it is substantially equal that powerful alloy is obtained after sintering The hard phase of even distribution greatly improves the wear-resisting property of valve seating.
The preferred zinc stearate of lubricant.
The technical solution in implementing to the present invention is described below, described example is only present invention a part Implement, instead of all the embodiments.
Here is three specific embodiment valve seating chemical components and its content (wt%)
Such as 1 institute of table:
1 three specific embodiment valve seating chemical components of table and its content
The performance parameter of 2 three specific embodiment valve seatings of table
According to reliability test specification, the valve seating product that examples detailed above 1.2.3 is researched and developed is enterprising in test-bed The test of row full speed full load, adds up operation 200 hours, is torn open machine examination and tested, valve seating size all in the margin of tolerance, has no mill Damage, valve do not sink, and service condition is good.
This patent product is detected through Yangzhou product quality supervision and inspection: hardness: HRC46.5, density: 7.72g/cm3, diameter To crushing strength 921Mpa.Meet Q/321081JQH001 " internal combustion engine powder metallurgy valve seat " prescribed requirement.
6110/125 diesel engine of this patent product (automobile) shows through rack reliability test using a kind of " diesel oil Machine powder metallurgy valve seat (i.e. patented product) " has excellent wearability and reliability, as shown in table 3.
3 6110 diesel engine of table uses 200 hours reliability comparative test results of this patent product
Note: 1-3 cylinder uses this patent product, and 4-6 cylinder is former using traditional material valve seating.Through endurance test in 200 hours Afterwards, this patent product average abrasion amount is 0.018mm, and traditional material valve seating average abrasion amount is 0.143mm, this patent product Average abrasion amount is only the 1/8 of common material valve seating.

Claims (5)

1. a kind of diesel engine powder metallurgy valve seat, which is characterized in that the valve seating chemical component and its content (wt%) are as follows: C:0.7 ~ 1.5%, Mo:4.5 ~ 9.5%, Cr:5.3 ~ 9.0%, Ti:0.2 ~ 1.0%, Ni:1.0 ~ 4.0%, Cu:10-20%, stearic acid Zinc: 0 ~ 1%, surplus Fe.
2. diesel engine powder metallurgy valve seat according to claim 1, which is characterized in that the valve seating chemical component and Its content (wt%) are as follows: C:0.7 ~ 1.2%, Mo:4.2 ~ 5.6%, Cr:4.5 ~ 8.6%, Ti:0.3 ~ 0.9%, Ni:1.5 ~ 3.7%, Cu: 15-19.6%, zinc stearate: 0 ~ 1%, surplus Fe.
3. diesel engine powder metallurgy valve seat according to claim 1, which is characterized in that the chemical component of the valve seating And its content (wt%) are as follows: C:0.8%, Mo:5.3%, Cr:6.5%, Ti:0.5%, Ni:1.5%, Cu:15%, zinc stearate: 0 ~ 1%, Surplus is Fe.
4. diesel engine powder metallurgy valve seat according to claim 1, which is characterized in that the chemical component of the valve seating And its content (wt%) are as follows: C:1.1%, Mo:8.1%, Cr:7.1%, Ti:0.7%, Ni:2.6%, Cu:17%, zinc stearate: 0 ~ 1%, Surplus is Fe.
5. diesel engine powder metallurgy valve seat according to claim 1, which is characterized in that the chemical component of the valve seating And its content (wt%) are as follows: C:1.2%, Mo:9.3%, Cr:8.5%, Ti:0.9%, Ni:3.8%, Cu:19%, zinc stearate: 0 ~ 1%, Surplus is Fe.
CN201811283358.4A 2018-10-31 2018-10-31 A kind of diesel engine powder metallurgy valve seat Pending CN109396443A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811283358.4A CN109396443A (en) 2018-10-31 2018-10-31 A kind of diesel engine powder metallurgy valve seat

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811283358.4A CN109396443A (en) 2018-10-31 2018-10-31 A kind of diesel engine powder metallurgy valve seat

Publications (1)

Publication Number Publication Date
CN109396443A true CN109396443A (en) 2019-03-01

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CN201811283358.4A Pending CN109396443A (en) 2018-10-31 2018-10-31 A kind of diesel engine powder metallurgy valve seat

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110614380A (en) * 2019-10-09 2019-12-27 合肥工业大学 Method for preparing high-uniformity molybdenum-tungsten-containing iron-based powder metallurgy part

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110614380A (en) * 2019-10-09 2019-12-27 合肥工业大学 Method for preparing high-uniformity molybdenum-tungsten-containing iron-based powder metallurgy part
CN110614380B (en) * 2019-10-09 2021-12-14 合肥工业大学 Method for preparing high-uniformity molybdenum-tungsten-containing iron-based powder metallurgy part

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Application publication date: 20190301

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