CN106077609A - High tenacity iron-base steam valve base made by powder metallurgy - Google Patents
High tenacity iron-base steam valve base made by powder metallurgy Download PDFInfo
- Publication number
- CN106077609A CN106077609A CN201610423782.9A CN201610423782A CN106077609A CN 106077609 A CN106077609 A CN 106077609A CN 201610423782 A CN201610423782 A CN 201610423782A CN 106077609 A CN106077609 A CN 106077609A
- Authority
- CN
- China
- Prior art keywords
- powder
- iron
- steam valve
- high tenacity
- graphite
- 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.)
- Granted
Links
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
- 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
- C22C32/001—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with only oxides
-
- 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
- C22C38/06—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
- C22C38/10—Ferrous alloys, e.g. steel alloys containing 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
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
-
- 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
- C22C38/14—Ferrous alloys, e.g. steel alloys containing 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
-
- 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 high tenacity iron-base steam valve base made by powder metallurgy, it is made up of the raw material of following mass percent: graphite is 1.7 2.6%, chromium powder is 1.4 1.5%, and cobalt powder is 4.5 4.8%, and aluminium powder is 1.6 1.8%, silica flour is 1.56 1.77%, zirconium powder is 0.4 0.7%, and niobium powder is 1.3 1.41%, and hafnium powder is 0.13 0.21%, auxiliary agent is 4.0 5.0%, and surplus is iron powder.The iron-base steam valve base made by powder metallurgy of the present invention is ensureing outside anti-corrosion, the high temperature resistant and anti-wear performance well having, also there is outstanding mechanical property and stability, make iron-base steam valve base made by powder metallurgy have good alloy property and Stability Analysis of Structures performance, prevent valve seating from brittle fracture occurring because of high rigidity.
Description
Technical field
The present invention relates to engine component and manufacture field, particularly to a kind of high tenacity iron-base steam valve base made by powder metallurgy.
Background technology
Valve seating is important spare part in automobile engine, and in the valve actuating mechanism of electromotor, valve seating is coordinated with valve
Coordinate the common effect that cylinder is played sealing.Along with automobile is fast-developing, valve seating is at work by many kinds of force (machinery punching
Hit, the washing away and rotten candle, the abrasion of dust, cold and hot stress alternation of high-temperature gas) common effect, be very easy to produce shape change
Change, high temperature scaling loss, even produce fracture.At the traditional heat resisting steel used or special alloy cast iron valve seating, burning can be utilized
During lead gasoline, lead-containing compounds produced by P, the S in burning gases is attached to the outer surface of valve seating, thus plays lubrication, subtracts
The effect rubbed.But, owing to the materials such as Pb, S that doped fuel is discharged when burning and metal jointly act on and be easily generated high temperature
Rotten candle causes valve seating to be destroyed, and pollutes environment, so doped fuel is stopped use the most substantially.So valve seating is in work
During because of the effect not having leaded thing to serve as lubricant, thus the valve seating life-span in use will be decreased,
Thus can produce the problems such as " valve sinking " even inefficacy easily, make the dynamic property meeting degradation of electromotor, start
The performance of machine and the quality of car load all can be affected by serious.
In view of this, the material having excellent resistance to elevated temperatures, good anti-wear performance and corrosion resisting property becomes prolongation
One of the key in valve seating service life.Beginning one's study development powder powder metallurgical valve seat material for these people, this is primarily due to
PM technique is simple, and disclosure satisfy that different production requirements.At present, external many developed countries have begun to use
Powder metallurgy produces engine valve seat, owing to China is for the production technology of powder metallurgically manufacturing valve seat insert immature,
It is in exploration and development, therefore, if excellent performance can be obtained, the powder metallurgy valve seat material that manufacturing cost is relatively low
Material is the research direction of technical staff.
Summary of the invention
The goal of the invention of the present invention is: for the problem of above-mentioned existence, it is provided that a kind of high tenacity ferrous based powder metallurgical gas
Gate seat, makes iron-base steam valve base made by powder metallurgy ensure outside anti-corrosion, the high temperature resistant and anti-wear performance well having, also has outstanding
Mechanical property and stability, make iron-base steam valve base made by powder metallurgy have good alloy property and Stability Analysis of Structures performance, prevent gas
Brittle fracture is there is in gate seat because of high rigidity.
The technical solution used in the present invention is as follows: a kind of high tenacity iron-base steam valve base made by powder metallurgy, by following percent mass
The raw material of ratio is made: graphite is 1.7-2.6%, and chromium powder is 1.4-1.5%, and cobalt powder is 4.5-4.8%, and aluminium powder is 1.6-1.8%,
Silica flour is 1.56-1.77%, and zirconium powder is 0.4-0.7%, and niobium powder is 1.3-1.41%, and hafnium powder is 0.13-0.21%, and auxiliary agent is
4.0-5.0%, surplus is iron powder.
In above-mentioned raw materials formula, graphite, chromium powder, cobalt powder and silica flour are the common element in powder metallurgy valve seat, aluminium powder
Addition can form ferroaluminium in sintering process with ferrum, ferroaluminium has good anti-corrosion under room temperature and hot environment
Property and non-oxidizability, expensive nickel element can be replaced with this, reduce the cost of material of valve seating；Niobium can improve ferrous alloy powder
The mechanical property of powder metallurgical valve seat, can significantly improve the comprcssive strength of iron-base steam valve base made by powder metallurgy, and niobium occurs after sintering
Metallurgical reaction, captures the oxygen element in alloy and is evenly distributed in matrix, the structure group to iron-base steam valve base made by powder metallurgy
Knit without impact, be a kind of good enhancing element；Zirconium can refine the structure organization of iron-base steam valve base made by powder metallurgy, promotes thin crystalline substance
Generate, stop growing up of crystal grain, increase pinning dislocation, stablize substructure, macroscopically improve hardness and the tensile strength of material,
Meanwhile, zirconium can also form FeZr3 phase with ferrum at matrix, reduces the porosity of alloy material, makes up powdered metallurgical material porosity
High shortcoming, it addition, zirconium can also form the ZrTi, ZrTi of low melting point uniformly diffusion, mutually overlap joint in tissue with titanium forms tool
Having the Zr-Ti skeleton of some strength and plasticity, other alloying pellets are filled therebetween, enhance toughness and the density of material；Hafnium energy
Forming stable carbide with carbon, hard hafnium carbide can strengthen the anti-wear performance of valve seating, simultaneously at hafnium particle surface energy
Form the oxide HfO2 more more stable than its carbide, as the effect of niobium, also can play and capture oxygen element to reach to purify
The purpose of crystal boundary, it addition, the carbide of hafnium can also slow down MC type carbide resolves into fragility M23C6 phase, and then stabilizing material
Alloy property.Further, described auxiliary agent is made up of the raw material of following masses percentage ratio: the lubricant of 60--70%, 15-20%
Nano titanium dioxide and the zinc oxide of 15-20%.
Further, described lubricant is nickel bag molybdenum bisuphide,.
Further, described graphite is flaky graphite, and particle diameter is 55-75 μm.
Further, it is contemplated that the raw material particle size impact on powdered metallurgical material, described iron powder is the mist of 100-130 μm particle diameter
Changing iron powder, the particle diameter of chromium powder, cobalt powder, aluminium powder, bismuth meal, silica flour, zirconium powder, niobium powder and hafnium powder is 75-100 μm.
As preferably, a kind of high tenacity iron-base steam valve base made by powder metallurgy, it is made up of the raw material of following mass percent: graphite
Being 2.2%, chromium powder is 1.4%, and cobalt powder is 4.5%, and aluminium powder is 1.8%, and silica flour is 1.77%, and zirconium powder is 0.6%, and niobium powder is
1.36%, hafnium powder is 0.18%, and auxiliary agent is 4.8%, and surplus is iron powder；Described auxiliary agent is by the raw material system of following masses percentage ratio
Becoming: the lubricant of 65%, the Nano titanium dioxide of 18% and the zinc oxide of 17%, described lubricant is nickel bag molybdenum bisuphide,
Described graphite is flaky graphite, and particle diameter is 55-75 μm, and described iron powder is the atomized iron powder of 100-130 μm particle diameter, chromium powder, cobalt
The particle diameter of powder, aluminium powder, bismuth meal, silica flour, zirconium powder, niobium powder and hafnium powder is 75-100 μm.
In sum, owing to have employed technique scheme, the invention has the beneficial effects as follows: at original basic components
On, by adding the alloying elements such as aluminum, niobium and zirconium, reduce the voidage of valve seating, improve consistency, thinning microstructure crystal grain,
Promote resistance to compression and tensile strength, make the alloy property of valve seating and mechanical property be improved significantly, and the addition of hafnium can not only
Improve valve seating wearability, moreover it is possible to improve valve seating toughness, to a certain extent, improve the elasticity of valve seating, bending resistance and
Shear behavior, alleviates the brittle fracture that valve seating produces because of much higher hard, promotes the stability of valve seating, therefore, the present invention
Iron-base steam valve base made by powder metallurgy ensureing outside anti-corrosion, the high temperature resistant and anti-wear performance that well has, also there is outstanding mechanics
Performance and stability, measured by experiment, and the hardness number of the iron-base steam valve base made by powder metallurgy of the present invention reaches 60-75HRC, radially
Crushing strength reaches 886-952MPa, and tensile strength reaches 1203-1260MPa, and toughness reaches 8.1-8.6MPa m1/2, material
Consistency reach 98.2-98.7%, according to hypervelocity durability-testing machines specification, exceed the speed limit durable examination to the valve seating of the present invention
After testing, there is not obvious sinkage, illustrate that the anti-wear performance of valve seating in the present invention is good.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in detail.
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with embodiment, to the present invention
It is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not used to
Limit the present invention.
Embodiment one
A kind of high tenacity iron-base steam valve base made by powder metallurgy, is made up of the raw material of following mass percent: graphite is 1.9%,
Chromium powder is 1.46%, and cobalt powder is 4.7%, and aluminium powder is 1.69%, and silica flour is 1.61%, and zirconium powder is 0.6%, and niobium powder is 1.38%,
Hafnium powder is 0.13%, and auxiliary agent is 4.3%, and surplus is iron powder；Described auxiliary agent is made up of the raw material of following masses percentage ratio: 66%
Lubricant, the Nano titanium dioxide of 17% and the zinc oxide of 17%, described lubricant is nickel bag molybdenum bisuphide, and described graphite is
Flaky graphite, particle diameter is 55-75 μm.
In view of the raw material particle size impact on powdered metallurgical material, described iron powder is the atomized iron powder of 100-130 μm particle diameter,
The particle diameter of chromium powder, cobalt powder, aluminium powder, bismuth meal, silica flour, zirconium powder, niobium powder and hafnium powder is 75-100 μm.
The preparation method of above-mentioned valve seating comprises the following steps:
Step one, raw material prepare, and taking graphite by quality respectively is 1.9%, and chromium powder is 1.46%, and cobalt powder is 4.7%, aluminum
Powder is 1.69%, and silica flour is 1.61%, and zirconium powder is 0.6%, and niobium powder is 1.38%, and hafnium powder is 0.13%, and auxiliary agent is 4.3%, remaining
Amount is iron powder, above-mentioned each component is placed in high speed ball mill and carries out mixed powder grinding 1h, and high speed ball mill rotating speed is 450rad/
Min, is subsequently placed in mix homogeneously in high-speed mixer, obtains primary batch mixing；
Step 2, design compacting tool set, with the inner chamber of zinc stearate alcoholic solution lubrication compacting tool set, then by compound
Pour in the mould designed, install punch die, make the upper surface holding level of punch die, after installation, mould is put into
Being pressed in powder compressing machine, pressing pressure is 238MPa, and pressing speed is 1mm/min, and the dwell time is 8min,
To pressed compact part；
Step 3, being put into by the pressed compact part obtained and carry out vacuum-sintering in vacuum sintering furnace, wherein, vacuum is not less than
1.0 × 10-3Pa, vacuum sintering furnace is first warming up to 250 DEG C, and heating rate is 90 DEG C/h, sinters 2h, then heats to 900 DEG C,
Heating rate is 1000 DEG C/h, is incubated 1h, then is warming up to 1200 DEG C, and heating rate is 1200 DEG C/h, is incubated 2-3h, drops
Temperature, to 500 DEG C, is incubated 1h, finally cools to room temperature with the furnace, obtain semi-finished product；
Step 4, being placed in heat-treatment furnace by the semi-finished product obtained and be heated to 1100 DEG C, being incubated 1h, then oil quenching is extremely
600-800 DEG C (temperature after oil quenching is difficult to control, but should be in 600-800 DEG C), is incubated 0.5h, then oil quenching is to room temperature, obtains
Quenching part；
Step 5, being placed in heat-treatment furnace by the semi-finished product obtained and be heated to 1100 DEG C, being incubated 1h, then oil quenching is extremely
600-800 DEG C, it is incubated 1h, then oil quenching is to room temperature, obtains quenching part；
Step 6, the quenching part obtained it is placed again in heat-treatment furnace and is heated to 660 DEG C, being incubated 1h, last air cooling
To room temperature, obtain being tempered part；
Step 7, carry out polishing and finishing by the tempering part obtained, carry out ultrasonic cleaning in deionized water, be dried；
After step 8, step 7 complete, the tempering part after cleaning is put into vacuum immersion oil machine and is carried out infiltrating lubricating oil process,
The process time is 7h, obtains finished product.
The zinc stearate alcoholic solution on gas, moisture and surface in order to remain in eliminating pressed compact part, pressed compact part is being carried out
Before vacuum-sintering, first pressed compact part is placed in drying oven and carries out 100 DEG C of insulation drying 3h, to reduce the generation of pore.
Embodiment two
A kind of high tenacity iron-base steam valve base made by powder metallurgy, is made up of the raw material of following mass percent: graphite is 1.7%,
Chromium powder is 1.5%, and cobalt powder is 4.8%, and aluminium powder is 1.6%, and silica flour is 1.56%, and zirconium powder is 0.4%, and niobium powder is 1.3%, hafnium powder
Being 0.21%, auxiliary agent is 4.0%, and surplus is iron powder；Described auxiliary agent is made up of the raw material of following masses percentage ratio: the lubrication of 60%
Agent, the Nano titanium dioxide of 20% and the zinc oxide of 20%, described lubricant is nickel bag molybdenum bisuphide, and described graphite is scale
Shape graphite, particle diameter is 55-75 μm, and described iron powder is the atomized iron powder of 100-130 μm particle diameter, chromium powder, cobalt powder, aluminium powder, bismuth meal, silicon
The particle diameter of powder, zirconium powder, niobium powder and hafnium powder is 75-100 μm.
The preparation method of above-mentioned valve seating comprises the following steps:
Step one, raw material prepare, and taking graphite by quality respectively is 1.7%, and chromium powder is 1.5%, and cobalt powder is 4.8%, aluminum
Powder is 1.6%, and silica flour is 1.56%, and zirconium powder is 0.4%, and niobium powder is 1.3%, and hafnium powder is 0.21%, and auxiliary agent is 4.0%, surplus
For iron powder, above-mentioned each component being placed in high speed ball mill and carry out mixed powder grinding 2h, high speed ball mill rotating speed is 450rad/min,
It is subsequently placed in mix homogeneously in high-speed mixer, obtains primary batch mixing；
Step 2, design compacting tool set, with the inner chamber of zinc stearate alcoholic solution lubrication compacting tool set, then by compound
Pour in the mould designed, install punch die, make the upper surface holding level of punch die, after installation, mould is put into
Being pressed in powder compressing machine, pressing pressure is 230MPa, and pressing speed is 1mm/min, and the dwell time is 8min,
To pressed compact part；
Step 3, the pressed compact part obtained is placed in drying oven carry out 100 DEG C insulation dry 4h,；
Step 4, will dry after pressed compact part put into vacuum sintering furnace carry out vacuum-sintering, wherein, vacuum is not less than
1.0 × 10-3Pa, vacuum sintering furnace is first warming up to 250 DEG C, and heating rate is 90 DEG C/h, sinters 2h, then heats to 900 DEG C,
Heating rate is 1000 DEG C/h, is incubated 1h, then is warming up to 1200 DEG C, and heating rate is 1200 DEG C/h, is incubated 2h, lowers the temperature
To 500 DEG C, it is incubated 2h, finally cools to room temperature with the furnace, obtain semi-finished product；
Step 5, being placed in heat-treatment furnace by the semi-finished product obtained and be heated to 1100 DEG C, being incubated 1h, then oil quenching is extremely
600-800 DEG C, it is incubated 1h, then oil quenching is to room temperature, obtains quenching part；
Step 6, the quenching part obtained it is placed again in heat-treatment furnace and is heated to 660 DEG C, being incubated 1h, last air cooling
To room temperature, obtain being tempered part；
Step 7, carry out polishing and finishing by the tempering part obtained, carry out ultrasonic cleaning in deionized water, be dried；
After step 8, step 7 complete, the tempering part after cleaning is put into vacuum immersion oil machine and is carried out infiltrating lubricating oil process,
The process time is 8h, obtains finished product.
Embodiment three
A kind of high tenacity iron-base steam valve base made by powder metallurgy, is made up of the raw material of following mass percent: graphite is 2.2%,
Chromium powder is 1.4%, and cobalt powder is 4.5%, and aluminium powder is 1.8%, and silica flour is 1.77%, and zirconium powder is 0.6%, and niobium powder is 1.36%, hafnium
Powder is 0.18%, and auxiliary agent is 4.8%, and surplus is iron powder；Described auxiliary agent is made up of the raw material of following masses percentage ratio: the profit of 65%
Lubrication prescription, the Nano titanium dioxide of 18% and the zinc oxide of 17%, described lubricant is nickel bag molybdenum bisuphide, and described graphite is squama
Flake graphite, particle diameter is 55-75 μm, and described iron powder is the atomized iron powder of 100-130 μm particle diameter, chromium powder, cobalt powder, aluminium powder, bismuth meal,
The particle diameter of silica flour, zirconium powder, niobium powder and hafnium powder is 75-100 μm.
The preparation method of above-mentioned valve seating comprises the following steps:
Step one, raw material prepare, and taking graphite by quality respectively is 2.2%, and chromium powder is 1.4%, and cobalt powder is 4.5%, aluminum
Powder is 1.8%, and silica flour is 1.77%, and zirconium powder is 0.6%, and niobium powder is 1.36%, and hafnium powder is 0.18%, and auxiliary agent is 4.8%, surplus
For iron powder, above-mentioned each component being placed in high speed ball mill and carry out mixed powder grinding 1h, high speed ball mill rotating speed is 450rad/min,
It is subsequently placed in mix homogeneously in high-speed mixer, obtains primary batch mixing；
Step 2, design compacting tool set, with the inner chamber of zinc stearate alcoholic solution lubrication compacting tool set, then by compound
Pour in the mould designed, install punch die, make the upper surface holding level of punch die, after installation, mould is put into
Being pressed in powder compressing machine, pressing pressure is 245MPa, and pressing speed is 1mm/min, and the dwell time is 8min,
To pressed compact part；
Step 3, the pressed compact part obtained is placed in drying oven carry out 100 DEG C insulation dry 3h；
Step 4, will dry after pressed compact part put into vacuum sintering furnace carry out vacuum-sintering, wherein, vacuum is not less than
1.0 × 10-3Pa, vacuum sintering furnace is first warming up to 250 DEG C, and heating rate is 90 DEG C/h, sinters 2h, then heats to 900 DEG C,
Heating rate is 1000 DEG C/h, is incubated 1h, then is warming up to 1200 DEG C, and heating rate is 1200 DEG C/h, is incubated 2h, lowers the temperature
To 500 DEG C, it is incubated 2h, finally cools to room temperature with the furnace, obtain semi-finished product；
Step 5, the semi-finished product obtained it is placed in heat-treatment furnace and is heated to 1100 DEG C, being incubated 0.5-1h, then oil quenching
To 600-800 DEG C (temperature after oil quenching is difficult to control, but should be in 600-800 DEG C), it is incubated 0.5h, then oil quenching is to room temperature,
To quenching part；
Step 6, the quenching part obtained it is placed again in heat-treatment furnace and is heated to 660 DEG C, being incubated 1h, last air cooling
To room temperature, obtain being tempered part；
Step 7, carry out polishing and finishing by the tempering part obtained, carry out ultrasonic cleaning in deionized water, be dried；
After step 8, step 7 complete, the tempering part after cleaning is put into vacuum immersion oil machine and is carried out infiltrating lubricating oil process,
The process time is 8h, obtains finished product.
Embodiment four
A kind of high tenacity iron-base steam valve base made by powder metallurgy, is made up of the raw material of following mass percent: graphite is 2.6%,
Chromium powder is 1.4%, and cobalt powder is 4.5%, and aluminium powder is 1.8%, and silica flour is 1.56%, and zirconium powder is 0.7%, and niobium powder is 1.41%, hafnium
Powder is 0.21%, and auxiliary agent is 5.0%, and surplus is iron powder；Described auxiliary agent is made up of the raw material of following masses percentage ratio: the profit of 70%
Lubrication prescription, the Nano titanium dioxide of 15% and the zinc oxide of 15%, described lubricant is nickel bag molybdenum bisuphide, and described graphite is squama
Flake graphite, particle diameter is 55-75 μm, and described iron powder is the atomized iron powder of 100-130 μm particle diameter, chromium powder, cobalt powder, aluminium powder, bismuth meal,
The particle diameter of silica flour, zirconium powder, niobium powder and hafnium powder is 75-100 μm.
The preparation method of above-mentioned valve seating comprises the following steps:
Step one, raw material prepare, and taking graphite by quality respectively is 2.6%, and chromium powder is 1.4%, and cobalt powder is 4.5%, aluminum
Powder is 1.8%, and silica flour is 1.56%, and zirconium powder is 0.7%, and niobium powder is 1.41%, and hafnium powder is 0.21%, and auxiliary agent is 5.0%, surplus
For iron powder, above-mentioned each component being placed in high speed ball mill and carry out mixed powder grinding 2h, high speed ball mill rotating speed is 450rad/min,
It is subsequently placed in mix homogeneously in high-speed mixer, obtains primary batch mixing；
Step 2, design compacting tool set, with the inner chamber of zinc stearate alcoholic solution lubrication compacting tool set, then by compound
Pour in the mould designed, install punch die, make the upper surface holding level of punch die, after installation, mould is put into
Being pressed in powder compressing machine, pressing pressure is 250MPa, and pressing speed is 1mm/min, and the dwell time is 8min,
To pressed compact part；
Step 3, the pressed compact part obtained is placed in drying oven carry out 100 DEG C insulation dry 4h,；
Step 4, will dry after pressed compact part put into vacuum sintering furnace carry out vacuum-sintering, wherein, vacuum is not less than
1.0 × 10-3Pa, vacuum sintering furnace is first warming up to 250 DEG C, and heating rate is 90 DEG C/h, sinters 2h, then heats to 900 DEG C,
Heating rate is 1000 DEG C/h, is incubated 1h, then is warming up to 1200 DEG C, and heating rate is 1200 DEG C/h, is incubated 3h, lowers the temperature
To 500 DEG C, it is incubated 1h, finally cools to room temperature with the furnace, obtain semi-finished product；
Step 5, being placed in heat-treatment furnace by the semi-finished product obtained and be heated to 1100 DEG C, being incubated 1h, then oil quenching is extremely
600-800 DEG C (temperature after oil quenching is difficult to control, but should be in 600-800 DEG C), is incubated 0.5h, then oil quenching is to room temperature, obtains
Quenching part；
Step 6, the quenching part obtained it is placed again in heat-treatment furnace and is heated to 660 DEG C, being incubated 1h, last air cooling
To room temperature, obtain being tempered part；
Step 7, carry out polishing and finishing by the tempering part obtained, carry out ultrasonic cleaning in deionized water, be dried；
After step 8, step 7 complete, the tempering part after cleaning is put into vacuum immersion oil machine and is carried out infiltrating lubricating oil process,
The process time is 8h, obtains finished product.
Finished product the various embodiments described above obtained is materialsed test respectively, omnipotent by WDW-200 type microcomputer controlled electronic
Testing machine, fracture toughness test machine and Rockwell Hardness meter measure tensile strength and radial crushing strength, toughness and the hardness of sample,
Then utilize Archimedes principle to survey its consistency, obtain following table:
According to hypervelocity long duration test specification, the finished product each embodiment obtained is full load test at full speed on test-bed,
Test speed is 6000r/min, and power is 65KW, peak torque 150N m, break-in 23h, external characteristics test 2h, strenuous test
300h, always runs 325h, and testing result is, abrasion is in Measurement Allowance, and obvious sinkage does not occurs in valve seating, resistance to
Mill property is qualified.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all essences in the present invention
Any amendment, equivalent and the improvement etc. made within god and principle, should be included within the scope of the present invention.
Claims (6)
1. a high tenacity iron-base steam valve base made by powder metallurgy, it is characterised in that be made up of the raw material of following mass percent: graphite
For 1.7-2.6%, chromium powder is 1.4-1.5%, and cobalt powder is 4.5-4.8%, and aluminium powder is 1.6-1.8%, and silica flour is 1.56-1.77%, zirconium powder
For 0.4-0.7%, niobium powder is 1.3-1.41%, and hafnium powder is 0.13-0.21%, and auxiliary agent is 4.0-5.0%, and surplus is iron powder.
2. high tenacity iron-base steam valve base made by powder metallurgy as claimed in claim 1, it is characterised in that described auxiliary agent is by following masses
The raw material of percentage ratio is made: the lubricant of 60-70%, the Nano titanium dioxide of 15-20% and the zinc oxide of 15-20%.
3. high tenacity iron-base steam valve base made by powder metallurgy as claimed in claim 2, it is characterised in that described lubricant is nickel bag two
Molybdenum sulfide.
4. high tenacity iron-base steam valve base made by powder metallurgy as claimed in claim 1, it is characterised in that described graphite is flakey stone
Ink, particle diameter is 55-75 μm.
5. high tenacity iron-base steam valve base made by powder metallurgy as claimed in claim 1, it is characterised in that described iron powder is 100-130 μ
The atomized iron powder of m particle diameter, the particle diameter of chromium powder, cobalt powder, aluminium powder, bismuth meal, silica flour, zirconium powder, niobium powder and hafnium powder is 75-100 μm.
6. high tenacity iron-base steam valve base made by powder metallurgy as claimed in claim 1, it is characterised in that by following mass percent
Raw material is made: graphite is 2.2%, and chromium powder is 1.4%, and cobalt powder is 4.5%, and aluminium powder is 1.8%, and silica flour is 1.77%, and zirconium powder is 0.6%,
Niobium powder is 1.36%, and hafnium powder is 0.18%, and auxiliary agent is 4.8%, and surplus is iron powder；Described auxiliary agent is by the raw material of following masses percentage ratio
Making: the lubricant of 65%, the Nano titanium dioxide of 18% and the zinc oxide of 17%, described lubricant is nickel bag molybdenum bisuphide, institute
Stating graphite is flaky graphite, and particle diameter is 55-75 μm, and described iron powder is the atomized iron powder of 100-130 μm particle diameter, chromium powder, cobalt powder,
The particle diameter of aluminium powder, bismuth meal, silica flour, zirconium powder, niobium powder and hafnium powder is 75-100 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610423782.9A CN106077609B (en) | 2016-06-15 | 2016-06-15 | High tenacity iron-base steam valve base made by powder metallurgy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610423782.9A CN106077609B (en) | 2016-06-15 | 2016-06-15 | High tenacity iron-base steam valve base made by powder metallurgy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106077609A true CN106077609A (en) | 2016-11-09 |
| CN106077609B CN106077609B (en) | 2018-08-31 |
Family
ID=57846149
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610423782.9A Active CN106077609B (en) | 2016-06-15 | 2016-06-15 | High tenacity iron-base steam valve base made by powder metallurgy |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106077609B (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106435383A (en) * | 2016-11-16 | 2017-02-22 | 马鞍山市恒欣减压器制造有限公司 | Iron-based powder metallurgy self-lubricating CNG engine valve retainer with good heat-conducting property and manufacturing method thereof |
| CN106583736A (en) * | 2016-11-16 | 2017-04-26 | 马鞍山市恒欣减压器制造有限公司 | Antioxidant iron-based powder metallurgy self-lubricating valve seat ring of CNG engine and manufacturing method thereof |
| CN106623906A (en) * | 2016-11-16 | 2017-05-10 | 马鞍山市恒欣减压器制造有限公司 | Iron-based powder metallurgy self-lubricating CNG engine valve seat ring high in tensile strength and manufacturing method thereof |
| CN106623904A (en) * | 2016-11-16 | 2017-05-10 | 马鞍山市恒欣减压器制造有限公司 | Heat-resistant ferrous-based powder metallurgy self-lubricating CNG engine valve seat ring and manufacturing method thereof |
| CN106623905A (en) * | 2016-11-16 | 2017-05-10 | 马鞍山市恒欣减压器制造有限公司 | Low-emission abrasion-resisting ferrum-based powder metallurgical self-lubricating compressed natural gas (CNG) engine valve retainer and manufacturing method thereof |
| CN106623893A (en) * | 2016-11-16 | 2017-05-10 | 马鞍山市恒欣减压器制造有限公司 | Anti-corrosion iron-based powder metallurgy self-lubricating CNG engine valve seat ring and making method thereof |
| CN106636996A (en) * | 2016-11-16 | 2017-05-10 | 马鞍山市恒欣减压器制造有限公司 | Dense black-spot-free iron-based powdery metallurgical self-lubricating CNG engine valve seat ring and preparation method thereof |
| CN108580889A (en) * | 2018-06-14 | 2018-09-28 | 余姚市菲特塑料有限公司 | A kind of manufacturing method of iron-based powder metallurgy parts |
| CN117026056A (en) * | 2023-04-24 | 2023-11-10 | 扬州威世新材料有限公司 | Powder metallurgy material and application thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2064155A (en) * | 1933-06-26 | 1936-12-15 | Frank A Fahrenwald | Valve and seat for internal combustion engines |
| CN1745184A (en) * | 2003-01-29 | 2006-03-08 | L·E·琼斯公司 | Corrosion and wear resistant alloy |
| CN103357863A (en) * | 2013-06-21 | 2013-10-23 | 马鞍山市恒毅机械制造有限公司 | High abrasion resistant metallurgy valve seat and preparation method thereof |
| CN103447524A (en) * | 2013-09-19 | 2013-12-18 | 安徽白兔湖动力有限公司 | Powder metallurgy valve seat ring and production method thereof |
| CN103589967A (en) * | 2013-10-23 | 2014-02-19 | 桐城市汽车部件有限公司 | Rare earth-containing powder metallurgy natural gas engine valve seat ring |
-
2016
- 2016-06-15 CN CN201610423782.9A patent/CN106077609B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2064155A (en) * | 1933-06-26 | 1936-12-15 | Frank A Fahrenwald | Valve and seat for internal combustion engines |
| CN1745184A (en) * | 2003-01-29 | 2006-03-08 | L·E·琼斯公司 | Corrosion and wear resistant alloy |
| CN103357863A (en) * | 2013-06-21 | 2013-10-23 | 马鞍山市恒毅机械制造有限公司 | High abrasion resistant metallurgy valve seat and preparation method thereof |
| CN103447524A (en) * | 2013-09-19 | 2013-12-18 | 安徽白兔湖动力有限公司 | Powder metallurgy valve seat ring and production method thereof |
| CN103589967A (en) * | 2013-10-23 | 2014-02-19 | 桐城市汽车部件有限公司 | Rare earth-containing powder metallurgy natural gas engine valve seat ring |
Non-Patent Citations (1)
| Title |
|---|
| 邢晶: "粉末冶金气门座的合金设计及组织性能", 《企业技术开发》 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106435383A (en) * | 2016-11-16 | 2017-02-22 | 马鞍山市恒欣减压器制造有限公司 | Iron-based powder metallurgy self-lubricating CNG engine valve retainer with good heat-conducting property and manufacturing method thereof |
| CN106583736A (en) * | 2016-11-16 | 2017-04-26 | 马鞍山市恒欣减压器制造有限公司 | Antioxidant iron-based powder metallurgy self-lubricating valve seat ring of CNG engine and manufacturing method thereof |
| CN106623906A (en) * | 2016-11-16 | 2017-05-10 | 马鞍山市恒欣减压器制造有限公司 | Iron-based powder metallurgy self-lubricating CNG engine valve seat ring high in tensile strength and manufacturing method thereof |
| CN106623904A (en) * | 2016-11-16 | 2017-05-10 | 马鞍山市恒欣减压器制造有限公司 | Heat-resistant ferrous-based powder metallurgy self-lubricating CNG engine valve seat ring and manufacturing method thereof |
| CN106623905A (en) * | 2016-11-16 | 2017-05-10 | 马鞍山市恒欣减压器制造有限公司 | Low-emission abrasion-resisting ferrum-based powder metallurgical self-lubricating compressed natural gas (CNG) engine valve retainer and manufacturing method thereof |
| CN106623893A (en) * | 2016-11-16 | 2017-05-10 | 马鞍山市恒欣减压器制造有限公司 | Anti-corrosion iron-based powder metallurgy self-lubricating CNG engine valve seat ring and making method thereof |
| CN106636996A (en) * | 2016-11-16 | 2017-05-10 | 马鞍山市恒欣减压器制造有限公司 | Dense black-spot-free iron-based powdery metallurgical self-lubricating CNG engine valve seat ring and preparation method thereof |
| CN108580889A (en) * | 2018-06-14 | 2018-09-28 | 余姚市菲特塑料有限公司 | A kind of manufacturing method of iron-based powder metallurgy parts |
| CN117026056A (en) * | 2023-04-24 | 2023-11-10 | 扬州威世新材料有限公司 | Powder metallurgy material and application thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106077609B (en) | 2018-08-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106077609A (en) | High tenacity iron-base steam valve base made by powder metallurgy | |
| CN103028730B (en) | Powder metallurgy preparation method of valve clack of membrane valve | |
| CN102251167B (en) | Manufacture method of slip sheet of air conditioner compressor | |
| CN106077660A (en) | A kind of powder metallurgy prepares the method for engine valve seat | |
| CN100473737C (en) | Wear-resistant bainite cast steel liner plate and manufacture process thereof | |
| WO2015141331A1 (en) | Valve seat constituted of iron-based sintered alloy | |
| CN101660165A (en) | Heat treatment process of preparing bearing roller by using G20CrNi2MoA steel instead of G20Cr2Ni4A steel | |
| CN102777499A (en) | Super polymer alloy bearing bush and manufacturing method thereof | |
| CN102424928A (en) | Mo-Si-B-W multi-phase composite material and preparation method thereof | |
| CN101245420A (en) | Sintered carbon, copper complex seeping method for producing high-strength powder metallurgy material | |
| CN1609256A (en) | Powder metallurgy steel rolling guide roll and producing method thereof | |
| CN101880798B (en) | Aluminium-based titanium carbide ceramic self-lubricating wear-resistant material | |
| CN103934453B (en) | Utilize the method for modified metal power forging gasoline engine connecting rod blank | |
| CN103406536A (en) | Powder metallurgy valve rod and manufacturing method thereof | |
| CN105983698A (en) | Powder forging method for forklift hub bearing | |
| CN101457317B (en) | Turbo material of AlTi basal body pressure booster and preparation method thereof | |
| CN106086718A (en) | A kind of clutch iron base composite friction material and preparation method thereof | |
| JP6392530B2 (en) | Ferrous sintered alloy valve seat | |
| CN109881119A (en) | High-intensitive engine powder metallurgy valve seating and its manufacture craft | |
| CN109576602A (en) | A kind of automobile engine powder metallurgy valve seat | |
| CN107287464A (en) | A kind of composite porous preparation method of titanium-based of the ceramics containing nano TiN | |
| CN106282853A (en) | A kind of preparation method of automobile gear iron base composite material | |
| CN109321810B (en) | 20 CrMnTi-based self-lubricating composite material with spherical Ag-Mg as solid lubricant and preparation method thereof | |
| Kong et al. | The surface and interface properties of vanadium carbide coating prepared by thermal diffusion process | |
| CN101994060B (en) | Ferrum-aluminium-chromium (Fe-Al-Cr) intermetallic compound powder metallurgy material and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20191223 Address after: No. 18, Guoxin South Road, juegang street, Rudong County, Nantong City, Jiangsu Province Patentee after: Nantong Hongming New Material Co., Ltd Address before: 610041, No. 18, building 1, No. two, No. 2, south section of No. 1 Ring Road, Wuhou District, Sichuan, Chengdu, China 1 Patentee before: Zhang Rongbin |
|
| TR01 | Transfer of patent right |