CN106435383A - Iron-based powder metallurgy self-lubricating CNG engine valve retainer with good heat-conducting property and manufacturing method thereof - Google Patents
Iron-based powder metallurgy self-lubricating CNG engine valve retainer with good heat-conducting property and manufacturing method thereof Download PDFInfo
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- CN106435383A CN106435383A CN201611007223.6A CN201611007223A CN106435383A CN 106435383 A CN106435383 A CN 106435383A CN 201611007223 A CN201611007223 A CN 201611007223A CN 106435383 A CN106435383 A CN 106435383A
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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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/52—Ferrous alloys, e.g. steel alloys containing chromium with nickel with cobalt
-
- 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
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/02—Compacting only
-
- 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
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
-
- 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
- B22F5/10—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of articles with cavities or holes, not otherwise provided for in the preceding subgroups
- B22F5/106—Tube or ring forms
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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
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
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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
- C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
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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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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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
- C22C38/40—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
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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
- C22C38/40—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
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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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/54—Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
-
- 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
- C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Inorganic Chemistry (AREA)
- Powder Metallurgy (AREA)
- Lubricants (AREA)
Abstract
The invention discloses an iron-based powder metallurgy self-lubricating CNG engine valve retainer with a good heat-conducting property. The iron-based powder metallurgy self-lubricating CNG engine valve retainer is prepared from, by weight, 6.4-6.8 parts of chrome, 4.4-4.8 parts of cobalt, 1.1-1.5 parts of nickel, 3.4-3.8 parts of scandium, 2.1-2.4 parts of niobium, 4.3-4.7 parts of aluminum, 13-15 parts of copper, 1.2-1.5 parts of nanometer molybdenum disulfide, 0.2-0.3 part of sodium borate, 0.7-0.9 part of strontium sulfide, 1-3 parts of stainless steel powder, 0.1-0.3 part of potassium permanganate, 2-3 parts of bisphenol-A epoxy resin, 0.6-0.8 part of realgar powder and 60-64 parts of iron. The surface of the modified nanometer molybdenum disulfide is covered with a layer of copper film used as a solid lubricating agent, meanwhile, strontium sulfide, scandium, niobium, aluminum and other ingredients are added, the product prepared through sintering, infiltration and heat treatment technologies is high in strength, good in heat-conducting property and excellent in wear resistance, and the working condition requirements of a natural gas fuel engine can be met.
Description
Technical field
The present invention relates to automobile engine accessory technical field, more particularly, to a kind of ferrous based powder metallurgical of good heat conductivity
Self-lubricating CNG engine valve retainer and preparation method thereof.
Background technology
Compressed natural gas (CNG), liquefied petroleum gas (LPG) and methanol etc. are environmental protections as the substitute fuel of internal combustion engine
Effective way with reasonable energy utilization.China's natural gas aboundresources is huge as its market prospect of engine washing fuel.
However, using novel energy, the applying working condition of auto parts particularly engine valve retainer can change, to its material
Propose new requirement.The Valve seat circle of CNG electromotor is the important process portion controlling combustion gas suction to discharge with waste gas
Part, stands the erosion of air-flow and the altofrequency impact friction of valve at high temperature, and working condition is very severe.Once valve retainer
By impact wear, lead to valve air-tightness to reduce, engine efficiency, and a large amount of rows of harmful components gas will be greatly lowered
Put.This requires that CNG engine valve retainer has higher thermostability, higher wearability and corrosion resistance.
Conventional valve retainer material includes casting alloy, forged steel product and powder metallurgy 3 big class.Wherein powder metallurgy gas
Seat ring is because having the advantages that less, no cutting, stock utilization height, design freedom are big, are suitable for large batch of production.General
Properties of Powder Metallurgy Iron-based Material haves the shortcomings that low-density and sponginess, wear out failure easily occurs in use, at present, the most often
There are two kinds of solutions：One is to add alloying element to form hard phase, improves intensity and the hardness of material, has obtained
Wearability：Two is density and the performance improving material by infiltration process.Document《Preparation technology is to iron-base steam valve base made by powder metallurgy
Circle compactness and the impact of performance》High-performance Fe-based powder metallurgy valve retainer is prepared for using sintering, infiltration, heat treatment.Grind
Study carefully the hole change to valve retainer for the different process, the impact of compactness, microscopic structure and mechanical property, determine that valve retainer causes
The optimum process condition of close property.Result shows, using infiltration or raising sintering temperature, the shape of hole can be made to tend to nodularization, greatly
The big quantity reducing hole and size are hence it is evident that improve the compactness of valve retainer.
Due to valve retainer oil-free lubrication in the course of the work, weatherability is poor, and service life is short, wear-resisting long-lasting difference, and
At present by adding hard particles, self-lubricating additive etc. and studying seldom by way of being combined using infiltration new technology.Document
In more single only with infiltration new technology, mode, prepared valve retainer idiosome poor toughness, cutting are poor, temperature-change resistance
Low, service life is short etc..
Content of the invention
The object of the invention is exactly the defect in order to make up prior art, provides a kind of ferrous based powder metallurgical of good heat conductivity
Self-lubricating CNG engine valve retainer and preparation method thereof.
The present invention is achieved by the following technical solutions：
A kind of ferrous based powder metallurgical self-lubricating CNG engine valve retainer of good heat conductivity, by the raw material system of following weight portion
Become：Chromium 6.4-6.8, cobalt 4.4-4.8, nickel 1.1-1.5, scandium 3.4-3.8, niobium 2.1-2.4, aluminum 4.3-4.7, copper 13-15, nanometer two
Molybdenum sulfide 1.2-1.5, sodium borate 0.2-0.3, strontium sulfide 0.7-0.9, stainless steel powder 1-3, potassium permanganate 0.1-0.3, bisphenol A-type
Epoxy resin 2-3, Realgar powder 0.6-0.8, ferrum 60-64.
A kind of manufacture method of the ferrous based powder metallurgical self-lubricating CNG engine valve retainer of described good heat conductivity,
Comprise the following steps：
（1）Nano molybdenum disulfide is added in the potassium permanganate solution that mass concentration is 5-15%, ultrasonic disperse is uniform, plus
Enter Realgar powder and be heated to 50-70 DEG C, be sufficiently stirred for 12-24 hour, filtration drying；
（2）Copper powder is put into and is brought rapidly up in crucible electrical resistance furnace to being completely melt, add step（1）Material ultrasonic stirring is mixed
Even, insulation standing 20-25 minute, molten metal is obtained copper clad below 100 μm for the particle diameter through powder by gas-atomization equipment modified
Nano molybdenum disulfide；
（3）By stainless steel powder in 720-800 DEG C of high-temperature calcination 20-30 minute, it is immediately placed in water and is cooled to room temperature ultrasonic disperse
10-15 minute, is spray-dried, and puts in appropriate dehydrated alcohol, adds strontium sulfide, sodium borate, step（2）Material grinds 40-50
Minute, dry to completely removing dehydrated alcohol, obtain mixed powder；
（4）Iron powder and chromium, cobalt, nickel, scandium, niobium, aluminium powder are put into ball milling mixing in mixed powder machine, adds step（3）Mixed powder, double
Phenol A type epoxy resin is heated to 50-60 DEG C, stirring 30-40 minute vacuum drying, is added in mould and is pressed into required form,
Obtain green compact；
（5）The copper sheet of above-mentioned green compact and same shape is put in push rod furnace, in 1000-1200 DEG C under the protective atmosphere of hydrogen
Sintering and infiltration 1-2 hour, is cooled to room temperature with the water jacket type of cooling；
（6）Valve retainer after the completion of sintering and infiltration is placed in batch-type furnace, is heated to 600-700 DEG C, be incubated 20-40 minute,
Oil quenching, to room temperature, is heated to 245-255 DEG C, is incubated 50-70 minute, cooling discharging.
It is an advantage of the invention that：Modified nano molybdenum disulfide surface is covered one layer of copper film and moistens as solid by the present invention
Lubrication prescription is added in matrix material, and density contrast is little, physical and mechanical properties are close, improves its wellability with matrix and interface
Bond strength is high, and density significantly improves, and reduces segregation, improves intensity and the frictional behaviour of material simultaneously, and clad can
To play the effect protecting the evaporation that kollag causes from high temperature or oxidation；Simultaneously the present invention be also added with strontium sulfide, scandium,
The compositions such as niobium, aluminum, change metallic phase transformation using sintering, infiltration, Technology for Heating Processing, are largely filled with valve retainer
Hole, reducing the porosity of valve retainer material, improve the compactness of valve retainer, thus improving the tough of valve retainer
Property, wearability, thermohardening and compactness, product strength height of the present invention, good heat conductivity, abrasion resistance are excellent, can meet natural
The working condition requirement of gas engine fuel.
Specific embodiment
A kind of ferrous based powder metallurgical self-lubricating CNG engine valve retainer of good heat conductivity, former by following weight portion
Material is made：Chromium 6.4, cobalt 4.4, nickel 1.1, scandium 3.4, niobium 2.1, aluminum 4.3, copper 13, nano molybdenum disulfide 1.2, sodium borate 0.2, sulfur
Change strontium 0.7, stainless steel powder 1, potassium permanganate 0.1, bisphenol A type epoxy resin 2, Realgar powder 0.6, ferrum 60.
A kind of manufacture method of the ferrous based powder metallurgical self-lubricating CNG engine valve retainer of described good heat conductivity,
Comprise the following steps：
（1）Nano molybdenum disulfide is added in the potassium permanganate solution that mass concentration is 5-15%, ultrasonic disperse is uniform, plus
Enter Realgar powder and be heated to 50-70 DEG C, be sufficiently stirred for 12-24 hour, filtration drying；
（2）Copper powder is put into and is brought rapidly up in crucible electrical resistance furnace to being completely melt, add step（1）Material ultrasonic stirring is mixed
Even, insulation standing 20-25 minute, molten metal is obtained copper clad below 100 μm for the particle diameter through powder by gas-atomization equipment modified
Nano molybdenum disulfide；
（3）By stainless steel powder in 720-800 DEG C of high-temperature calcination 20-30 minute, it is immediately placed in water and is cooled to room temperature ultrasonic disperse
10-15 minute, is spray-dried, and puts in appropriate dehydrated alcohol, adds strontium sulfide, sodium borate, step（2）Material grinds 40-50
Minute, dry to completely removing dehydrated alcohol, obtain mixed powder；
（4）Iron powder and chromium, cobalt, nickel, scandium, niobium, aluminium powder are put into ball milling mixing in mixed powder machine, adds step（3）Mixed powder, double
Phenol A type epoxy resin is heated to 50-60 DEG C, stirring 30-40 minute vacuum drying, is added in mould and is pressed into required form,
Obtain green compact；
（5）The copper sheet of above-mentioned green compact and same shape is put in push rod furnace, in 1000-1200 DEG C under the protective atmosphere of hydrogen
Sintering and infiltration 1-2 hour, is cooled to room temperature with the water jacket type of cooling；
（6）Valve retainer after the completion of sintering and infiltration is placed in batch-type furnace, is heated to 600-700 DEG C, be incubated 20-40 minute,
Oil quenching, to room temperature, is heated to 245-255 DEG C, is incubated 50-70 minute, cooling discharging.
Using the CNG engine valve retainer that the present invention is obtained, there is following technical characteristic：
（1）Density/(g cm-3)：7.81；
（2）Open porosity/%：0.02；
（3）Hardness/HRC：48；
（4）Maximum load Fmax/kN：2.371；
（5）Coefficient of friction：0.081.
Claims (2)
1. a kind of ferrous based powder metallurgical self-lubricating CNG engine valve retainer of good heat conductivity is it is characterised in that by following heavy
The raw material of amount part is made：Chromium 6.4-6.8, cobalt 4.4-4.8, nickel 1.1-1.5, scandium 3.4-3.8, niobium 2.1-2.4, aluminum 4.3-4.7, copper
13-15, nano molybdenum disulfide 1.2-1.5, sodium borate 0.2-0.3, strontium sulfide 0.7-0.9, stainless steel powder 1-3, potassium permanganate
0.1-0.3, bisphenol A type epoxy resin 2-3, Realgar powder 0.6-0.8, ferrum 60-64.
2. the ferrous based powder metallurgical self-lubricating CNG engine valve retainer of a kind of good heat conductivity according to claim 1
Manufacture method it is characterised in that comprising the following steps：
（1）Nano molybdenum disulfide is added in the potassium permanganate solution that mass concentration is 5-15%, ultrasonic disperse is uniform, plus
Enter Realgar powder and be heated to 50-70 DEG C, be sufficiently stirred for 12-24 hour, filtration drying；
（2）Copper powder is put into and is brought rapidly up in crucible electrical resistance furnace to being completely melt, add step（1）Material ultrasonic stirring is mixed
Even, insulation standing 20-25 minute, molten metal is obtained copper clad below 100 μm for the particle diameter through powder by gas-atomization equipment modified
Nano molybdenum disulfide；
（3）By stainless steel powder in 720-800 DEG C of high-temperature calcination 20-30 minute, it is immediately placed in water and is cooled to room temperature ultrasonic disperse
10-15 minute, is spray-dried, and puts in appropriate dehydrated alcohol, adds strontium sulfide, sodium borate, step（2）Material grinds 40-50
Minute, dry to completely removing dehydrated alcohol, obtain mixed powder；
（4）Iron powder and chromium, cobalt, nickel, scandium, niobium, aluminium powder are put into ball milling mixing in mixed powder machine, adds step（3）Mixed powder, double
Phenol A type epoxy resin is heated to 50-60 DEG C, stirring 30-40 minute vacuum drying, is added in mould and is pressed into required form,
Obtain green compact；
（5）The copper sheet of above-mentioned green compact and same shape is put in push rod furnace, in 1000-1200 DEG C under the protective atmosphere of hydrogen
Sintering and infiltration 1-2 hour, is cooled to room temperature with the water jacket type of cooling；
（6）Valve retainer after the completion of sintering and infiltration is placed in batch-type furnace, is heated to 600-700 DEG C, be incubated 20-40 minute,
Oil quenching, to room temperature, is heated to 245-255 DEG C, is incubated 50-70 minute, cooling discharging.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611007223.6A CN106435383A (en) | 2016-11-16 | 2016-11-16 | Iron-based powder metallurgy self-lubricating CNG engine valve retainer with good heat-conducting property and manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611007223.6A CN106435383A (en) | 2016-11-16 | 2016-11-16 | Iron-based powder metallurgy self-lubricating CNG engine valve retainer with good heat-conducting property and manufacturing method thereof |
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| CN106435383A true CN106435383A (en) | 2017-02-22 |
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| CN201611007223.6A Pending CN106435383A (en) | 2016-11-16 | 2016-11-16 | Iron-based powder metallurgy self-lubricating CNG engine valve retainer with good heat-conducting property and manufacturing method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110106440A (en) * | 2019-05-05 | 2019-08-09 | 张波 | A kind of high temperature heat transfer material and its preparation method and application |
| CN112943404A (en) * | 2021-02-07 | 2021-06-11 | 浙江吉利控股集团有限公司 | Engine valve seat ring and methanol engine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101634238A (en) * | 2009-08-31 | 2010-01-27 | 桐城市汽车部件有限公司 | Temperature-pressure-die wall lubrication valve seat containing rare earth powder metallurgy and manufacturing method thereof |
| CN104399966A (en) * | 2014-10-27 | 2015-03-11 | 奚杰 | Powder metallurgy valve seat containing nano Fe |
| CN105177461A (en) * | 2015-06-29 | 2015-12-23 | 北京科技大学 | Iron-based self-lubricating material and preparation method thereof |
| CN106077609A (en) * | 2016-06-15 | 2016-11-09 | 张荣斌 | High tenacity iron-base steam valve base made by powder metallurgy |
-
2016
- 2016-11-16 CN CN201611007223.6A patent/CN106435383A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101634238A (en) * | 2009-08-31 | 2010-01-27 | 桐城市汽车部件有限公司 | Temperature-pressure-die wall lubrication valve seat containing rare earth powder metallurgy and manufacturing method thereof |
| CN104399966A (en) * | 2014-10-27 | 2015-03-11 | 奚杰 | Powder metallurgy valve seat containing nano Fe |
| CN105177461A (en) * | 2015-06-29 | 2015-12-23 | 北京科技大学 | Iron-based self-lubricating material and preparation method thereof |
| CN106077609A (en) * | 2016-06-15 | 2016-11-09 | 张荣斌 | High tenacity iron-base steam valve base made by powder metallurgy |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110106440A (en) * | 2019-05-05 | 2019-08-09 | 张波 | A kind of high temperature heat transfer material and its preparation method and application |
| CN112943404A (en) * | 2021-02-07 | 2021-06-11 | 浙江吉利控股集团有限公司 | Engine valve seat ring and methanol engine |
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Application publication date: 20170222 |