CN108193094A - Wear-resistant aluminium alloy material for gear pump floating side plate and preparation method thereof - Google Patents
Wear-resistant aluminium alloy material for gear pump floating side plate and preparation method thereof Download PDFInfo
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- CN108193094A CN108193094A CN201810057746.4A CN201810057746A CN108193094A CN 108193094 A CN108193094 A CN 108193094A CN 201810057746 A CN201810057746 A CN 201810057746A CN 108193094 A CN108193094 A CN 108193094A
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- aluminium alloy
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- resistant aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/02—Alloys based on aluminium with silicon as the next major constituent
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/026—Alloys based on aluminium
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Abstract
The invention discloses a kind of for wear-resistant aluminium alloy material of gear pump floating side plate and preparation method thereof, it is related to gear pump technical field, the wear-resistant aluminium alloy material is by following mass percent into being grouped as：Si：≤9.7%；Fe：0.83~1.2%；Cu：2.0~3.2%；Mn：0.17~0.32%；Mg：0.37~0.53%；Zn：0.82~1.03%；Cr：0.05~0.09%；Ni：0.06~1.0%；Ti：0.04~0.08%；Surplus is Al.The present invention is good, light-weight by product strength height, the wear-resisting property of aluminium alloy compression casting；Based on aluminum alloy material, according to the characteristic of aluminum alloy material, make product processing machinability good, improve production efficiency.Since aluminium alloy side plate is single metal, solves the characteristics of different metal shrinkage ratio differs, causes deformation of products coefficient big.
Description
Technical field
The present invention relates to gear pump technical fields, are specifically a kind of wear-resistant aluminum alloys for gear pump floating side plate
Material and preparation method thereof.
Background technology
Traditional gear pump side-plank is all to engage the bimetallic material formed with steel plate using alloyed copper to produce.Bimetallic
Characteristic of the side plate based on 08F steel of material processing causes difficulty of processing big, causes the production cycle long.In addition, bimetallic side plate by
The product is caused the characteristics of different materials shrinkage ratio is inconsistent, and deformation coefficient is big during the work time, influences life of product.
Invention content
In order to solve existing gear pump side-plank difficult processing, the defects of production cycle is long, deformation coefficient is big, of high cost, this hair
Bright being designed to provide is a kind of for wear-resistant aluminium alloy material of gear pump floating side plate and preparation method thereof, is mainly used for light
Quantify, thermal diffusivity is good, field of environment protection middle or high pressure hydraulic element side plate makes.
To achieve the above objectives, the technical solution adopted by the present invention is that：A kind of wear-resisting aluminium for gear pump floating side plate
Alloy material, the wear-resistant aluminium alloy material is by following mass percent into being grouped as：Si：≤9.7%；Fe：0.83~1.2%；
Cu：2.0~3.2%；Mn：0.17~0.32%；Mg：0.37~0.53%；Zn：0.82~1.03%；Cr：0.05~0.09%；Ni：
0.06~1.0%；Ti：0.04~0.08%；Surplus is Al.
Based on the above technical solution, the wear-resistant aluminium alloy material by following mass percent into being grouped as：Si：
4.85%；Fe：1.02%；Cu：2.6%；Mn：0.25%；Mg：0.45%；Zn：0.93%；Cr：0.07%；Ni：0.53%；Ti：0.06%；
Surplus is Al.
The present invention also provides a kind of methods that gear pump floating side plate is prepared using above-mentioned wear-resistant aluminium alloy material, pass through pressure
After the method for power casting melts wear-resistant aluminium alloy material, with die casting machine by side plate die casting by the wear-resistant aluminum alloy of thawing
Material die casting forms aluminum alloy side panel products.
Based on the above technical solution, include the following steps：Step S1. choose suitable Si, Fe, Cu, Mn, Mg,
Zn, Cr, Ni, Ti, Al carry out dispensing；The Al matched is fitted into melting furnace by step S2. to be melted, after Al fusings, according to
It is secondary to add in Si, Fe, Cu, Mn, Mg, Zn, Cr, Ni, Ti, melt is stirred；It is same that melt liquid level to be dissolved rises to normal value
When melt temperature when reaching 700 DEG C, open fire door and carry out slagging-off operation；Step S3. when melt completed in stove slagging-off operation and
Ingredient after the assay was approved, temperature is reached during 720-750 DEG C of melt releasing is transferred to and is subcontracted, is then subcontracted by and is transported to rotation and remove
Gas area is refined；After the completion of step S4. refinings, the metaideophone melt into die casting machine holding furnace；Pass through side plate pressure using die casting machine
Casting mould is by the wear-resistant aluminium alloy material die casting of thawing.
The beneficial effects of the present invention are：
1st, wear-resistant aluminium alloy material excellent cutting performance, easy processing substantially reduce the production cycle, improve production efficiency.
2nd, wear-resistant aluminium alloy material is light-weight, good heat dissipation effect, improves the working efficiency of product.
3rd, wear-resistant aluminium alloy material is homogenous material, eliminate due to different materials shrinkage ratio it is inconsistent the shortcomings that, improve
Life of product.
Description of the drawings
Fig. 1 is the structure diagram that middle gear of the embodiment of the present invention pumps floating side plate.
Specific embodiment
The embodiment of the present invention is described below in detail, the embodiment described example is shown in the drawings, wherein from beginning to end
Same or similar label represents same or similar element or the element with same or like function.
It is shown in Figure 1, an embodiment of the present invention provides a kind of wear-resistant aluminium alloy material for gear pump floating side plate,
The wear-resistant aluminium alloy material is by following mass percent into being grouped as：
Si：≤9.7%；
Fe：0.83~1.2%；
Cu：2.0~3.2%；
Mn：0.17~0.32%；
Mg：0.37~0.53%；
Zn：0.82~1.03%；
Cr：0.05~0.09%；
Ni：0.06~1.0%；
Ti：0.04~0.08%；
Surplus is Al.
Specifically, the wear-resistant aluminium alloy material by following mass percent into being grouped as：
Si：4.85%；
Fe：1.02%；
Cu：2.6%；
Mn：0.25%；
Mg：0.45%；
Zn：0.93%；
Cr：0.07%；
Ni：0.53%；
Ti：0.06%；
Surplus is Al.
The invention also discloses a kind of methods that gear pump floating side plate is prepared using above-mentioned wear-resistant aluminium alloy material, pass through
After the method for compression casting melts wear-resistant aluminium alloy material, the wear-resisting aluminium of thawing is closed by side plate die casting with die casting machine
Golden material die casting forms aluminum alloy side panel products.
Specifically, include the following steps：
Step S1. chooses suitable Si, Fe, Cu, Mn, Mg, Zn, Cr, Ni, Ti, Al and carries out dispensing；
The Al matched is fitted into melting furnace by step S2. to be melted, after Al fusing after, sequentially add Si, Fe, Cu, Mn,
Mg, Zn, Cr, Ni, Ti are stirred melt；Melt liquid level to be dissolved rises to normal value, and melt temperature reaches 700 DEG C simultaneously
When, it opens fire door and carries out slagging-off operation；
Step S3. when melt completed in stove slagging-off operation and ingredient after the assay was approved, temperature is reached to 720-750 DEG C of melt
Releasing is subcontracted in being transferred to, then subcontracted by transport to rotation deaeration zone refine；
After the completion of step S4. refinings, the metaideophone melt into die casting machine holding furnace；It will be melted by side plate die casting using die casting machine
The wear-resistant aluminium alloy material die casting of change.
In the following, by specific embodiment come the invention will be further described.
Embodiment one
An embodiment of the present invention provides a kind of wear-resistant aluminium alloy material for gear pump floating side plate, the wear-resistant aluminium alloy materials
By following mass percent into being grouped as：
Fe：0.83%；
Cu：2.0%；
Mn：0.17%；
Mg：0.37%；
Zn：0.82%；
Cr：0.05%；
Ni：0.06%；
Ti：0.04%；
Al：95.66%.
Embodiment two
An embodiment of the present invention provides a kind of wear-resistant aluminium alloy material for gear pump floating side plate, the wear-resistant aluminium alloy materials
By following mass percent into being grouped as：
Si：9.7%；
Fe：1.2%；
Cu：3.2%；
Mn：0.32%；
Mg：0.53%；
Zn：1.03%；
Cr：0.09%；
Ni：1.0%；
Ti：0.08%；
Al：82.85.
Embodiment three
An embodiment of the present invention provides a kind of wear-resistant aluminium alloy material for gear pump floating side plate, the wear-resistant aluminium alloy materials
By following mass percent into being grouped as：
Si：4.85%；
Fe：1.02%；
Cu：2.6%；
Mn：0.25%；
Mg：0.45%；
Zn：0.93%；
Cr：0.07%；
Ni：0.53%；
Ti：0.06%；
Al：89.24.
1. die-casting process is die casting machine, compression mod and three big element of alloy organically to be combined and be subject to the process of integrated use.
And during die casting metal by filling cavity process be that the technological factors such as pressure, speed, temperature and time are obtained into unified mistake
Journey.Its principle is：1. die-casting process principle is that molten metal is pressed at a high speed 2. in a precision metallic mold cavity using high pressure
Molten metal under pressure cooled and solidified and form casting.3. hot and cold chamber pressure casting is two kinds of basic modes of die-casting process.
Molten metal is poured by manually or automatically casting device in pressure chamber in cold chamber die casting and then injection punch head advances metal
Hydraulic pressure enters cavity.Pressure chamber automatically flows into pressure perpendicular to crucible inner metal liquid by the feed inlet in pressure chamber in hot chamber diecasting technique
Room.Injection punch head, which moves downward, pushes molten metal to enter cavity by gooseneck.Die casting, which is opened, after molten metal solidification takes out
Casting completes a die casting cycle.
2. suitable device STM-400 melting furnaces.
3. technological process furnace charge preparation → dispensing → charging →, which melts → skimming →, to be subcontracted → refining → and imports guarantor in importing
Warm stove.
4. preparation
The preparation of 4.1 equipment check STM-400 melting furnaces, in subcontract, in subcontract preheating device, rotary degassing device, driving etc.
Whether can work normally.
It subcontracts to subcontract to have to pass through when not used more than 24 hours in heating molten aluminums in 4.2 and toasts 3 hours or more and can use
Preheating preheating temperature in preheating device must be subcontracted before normal use in and is set as 400 DEG C.
4.3 want swabbing and must before use with the tool of molten metal contacts (bell jar slag hitting spoon thermocouple skim spoon etc.)
It must can be used by fully toasting and keeping the temperature a period of time rear.
The preparation of 4.4 raw material:Whether on deck to check alloy pig, deslagging agent, refining agent etc., and Yi Shang material should all
It is to examine qualification, various raw material must carry out mark.
The classification of 4.5 foundry returns and the unqualified blank of additional proportion level-one foundry returns are free of caused by ingredient reason not
Qualified, cast gate≤40 % two level foundry returns slag trap, big overlap, remelted alloy ingot≤20 % three-level foundry returns are fine crushing flies
Side, serious greasy dirt material need to through remelting, remove the gred, pour ingot after make two level foundry returns using paying attention to level-ones foundry returns and two level foundry returns
The sum of weight account for the ratio of furnace charge total weight and should be less than 40%.4. after blowing out again blow-on when
5. according to the form below is answered to carry out 9. DEG C of heating-up time h of baker 6. initial temperature, 7. DEG C of heating rates, 8. DEG C/h final temperatures
Notice that the temperature of this table of refers to " fire box temperature " heating curve and should be determined according to the show value of fire box temperature during blow-on.
6. combustion ignition
Following item should be checked before 6.1 igniting
6.1.1 temperature control instrument is shown just the switch disconnector in the inspection whether normal switch board of switch board power supply in an ON state
Chang Chuci power transmissions alarm meeting sound-light alarm is pressed Reset key and is stopped by alarm.
6.1.2 whether observation gaseous-pressure is too high or too low and the whether too low normal combustion device combustion gas of compressed air uses pressure
Power range 5-10kpa.Fuel gas source pressure should be less than 100kpa.
6.1.3 power supply and gaseous-pressure can normally be brought into operation with starting device.
6.2 heat preservation furnace ignitings
6.2.1 " emergency stop " button is in release conditions
6.2.2 starting " combustion fan " button runs combustion fan.
6.2.3 " thermal insulation combustor switch " is got into " automatic " position thermal insulation combustor by automatic ignition.
6.2.4 temp controlled meter detected value controls on cabinet panel " igniting simultaneously more than the operation that setting value will stop burner
Indicating " indicator light goes out and do not have to any operation at this time and treat that temperature drops to the temperature value burner of setting and will light a fire again automatically.
6.3 fusing furnace ignitings
6.3.1 " emergency stop " button is in release conditions.
6.3.2 if " combustion fan " runs combustion fan without starting first startup " combustion fan " button.
6.3.3 " main solenoid valve is opened " indicator light is bright after wind pressure is normal." combustion air forces down " indicator light goes out.
6.3.4 fusing burner control button " hand/automatic " should be placed in " automatic " position setting " molten aluminum temp controlled meter " and " flue gas
Temp controlled meter " make its not overtemperature state melt at this time burner will automatic running point fight and controlled automatically according to the signal of temp controlled meter
The size of firepower processed.There is large and small fire state instruction on the control panel.
6.3.5 it is bright unsuccessfully to have corresponding red-fault alarm indicator on alarm control panel for burner flame detection.
It clicks the Reset button burner and repeats igniting operation automatically.Whether continuous 3 igniting are unsuccessful will checks general mood ratio
Whether suitable igniting and detection circuit are faulty.Heat preservation scarfing cinder fire door is opened simultaneously and fusing scarfing cinder fire door is aerated and prevents
Because combustion gas adds up excessively to set off an explosion.
6.3.6 two burners can work at the same time can also only operation wherein any one.
6.3.7 temp controlled meter detected value will be out of service more than setting value burner while controls overtemperature on cabinet panel red
Indicator light is bright not to be had to any operation and treats that temperature drops to the temperature value burner of setting and will light a fire again automatically at this time.
7. charging
It can feed after baker is had to pass through when being reused after 7.1 blowing outs.
All combustors are first closed before 7.2 initial charges.
7.3 first add in appropriate fritter foundry returns place mat in fusion zone bottom to prevent smashing furnace bottom from melting clean-out door.
Foundry returns and aluminium ingot are added in truck by 7.4 in proportion pays attention to the high upper edge no more than truck of material.
The trolley that 7.5 opening stock shelf goalkeepers fill it up with material promotes shutdown in stock shelf.
" hand/auto feed " button is spun on " automatic " position by 7.6 to be pressed " charging automatic " button and starts auto feed.
Trolley is pulled out charging after falling into place and pushes in the next cycle of shutdown progress again by 7.7 trolleies.
" hand/auto feed " button is spun on " manual " position by 7.8 using during charging manually.
The sequence of the 7.9 manual fashion materials of use is that opens Door by Hand, and-manual rising-Manual descending-closes the door manually.Pay attention to hands
Should persistently open the door during dynamic up and down by the corresponding button, tap at closing time can expect full instruction " lamp it is bright when manually, it is automatic all
It cannot feed.
8. heat preservation zone is removed the gred
8.1 open heat-preservation furnace door when the liquid aluminum dissolved rises to normal value while temperature of aluminum liquid reaches 700 DEG C carries out slagging-off work
Industry.
8.2 deslagging agent dosages according to aluminium slag number plus 5-7 packets deslagging agent by often packet 1Kg calculate.
8.3 are opening moist closet and when dissolving chamber fire door should first close corresponding burner in order to avoid furnace flame string goes out burn
Operating personnel.
Deslagging agent should be made to close oven door opening combustor after being sufficiently mixed with surface layer clinker during 8.4 operation to reheat 15 minutes
Carry out slagging-off operation again afterwards.Notice that cylinder handles are rotated down to rotate to be pass on being opened to.
9 examine wait the liquid aluminum dissolved rise to normal value simultaneously temperature of aluminum liquid reach 700 DEG C when from heat preservation fire door dip examination
Sample carries out chemical composition analysis.It is subcontracted in 1 time/stoves of frequency .
10. it comes out of the stove when molten aluminum completes slagging-off operation, ingredient after the assay was approved in stove and temperature of aluminum liquid reaches 720-
At 750 DEG C can by molten aluminum release be transferred in subcontract subcontracted by transport to rotation deaeration zone refine.Pay attention to one after liquid
Surely it to replace hot top and pull switching valve and block liquid outlet.Be put into the amount of transfer alclad liquid at least will wrap edge less than transfer
30cm。
11. molten aluminum metaideophone
11.1 subcontracted by in molten aluminum injection die casting machine holding furnace in.
11.2 will constantly observe liquid level situation in holding furnace into die casting machine holding furnace during metaideophone molten aluminum, prevent molten aluminum
It overflows, it is desired to which the liquid level of molten aluminum should be at least below more than holding furnace upper edge 30cm.
12. blowing out
12.1 stoves are standby, and there are two liquid outlet, there are one the slag tap use lower than common liquid outlet position in addition to common liquid outlet
Molten aluminum in stove should thoroughly be put when the residue that discharge is deposited on bottom usually periodically discharges long-term blowing out depending on molten aluminum ingredient situation
It uses up to clean and effectively protect stove.
12.2 as found out, freely the tool of iron staff etc not can be used to dredge a lower liquid outlet but exhausted for liquid when first used
To taking care in order to avoid scalding.
Slow cooling is answered during 12.3 blowing out.The definite value of burner hearth temp controlled meter can be set in 300 DEG C and treat that actual temperature is down to this
The orderly close-down of combustion gas-combustion air-power supply is pressed after temperature.
13. oxide removes operation should be thoroughly clear by the oxide for being attached to furnace wall, furnace bottom in long-term blowing out or while repairing stove
Divided by effective protection stove refractory material it is without damage carry out oxide remove operation when should be by dissolving chamber temperature setting 700
DEG C -750 DEG C keep room temperatures be arranged on 600 DEG C of -700 DEG C of continuous operations closed after 30 minutes all burners take advantage of in-furnace temperature compared with
The oxide of dissolving chamber furnace wall, furnace bottom is scraped to the stove for opening moist closet when high oxide softens with the tool of scoop etc
Goalkeeper's moist closet and dissolving chamber inner oxide are careful not exert oneself excessive when clawing furnace maneuver with tool in order to avoid damaging furnace wall
On refractory material.
14. 800 DEG C of 710 of parameter setting temperature of aluminum liquid , 730 DEG C of flue-gas temperature , 800 , 840 DEG C of fire box temperature , 760
15. other 15.1 new producers of new raw and auxiliary material without verification on probation, new material do not allow to use.
15.2 per tour must subcontract containment wall, packet bottom in molten aluminum of thorough cleaning.
15.3 go out aluminium diversion trench often using it is primary must thorough cleaning it is primary and brush baking paint in due course and dry.
15.4 operation conditions that fork truck is paid close attention to when adding molten aluminum prevent molten aluminum spillage from hurting sb.'s feelings.
15.5, which fill in record of handing over to the next shift, carries out live clean and tidy work.15.6 smelters are pre-job must to have dressed labor protection
Articles for use, which are carried out, has sprayed tool the operations such as coating and drying
In the description of specification, reference term " one embodiment ", " preferably ", " example ", " specific example " or " some show
The description of example " etc. means, with reference to the embodiment or example particular features, structures, materials, or characteristics described, to be contained in this hair
In bright at least one embodiment or example, phase is not necessarily referring to for the schematic representation of above-mentioned term in the present specification
Same embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in any one or more
It is combined in a suitable manner in embodiment or example.
The present invention is not limited to the above-described embodiments, for those skilled in the art, is not departing from
Under the premise of the principle of the invention, several improvements and modifications can also be made, these improvements and modifications are also considered as the protection of the present invention
Within the scope of.The content not being described in detail in this specification belongs to the prior art well known to professional and technical personnel in the field.
Claims (4)
1. a kind of wear-resistant aluminium alloy material for gear pump floating side plate, which is characterized in that the wear-resistant aluminium alloy material by with
Lower mass percent into being grouped as：
Si：≤9.7%；
Fe：0.83~1.2%；
Cu：2.0~3.2%；
Mn：0.17~0.32%；
Mg：0.37~0.53%；
Zn：0.82~1.03%；
Cr：0.05~0.09%；
Ni：0.06~1.0%；
Ti：0.04~0.08%；
Surplus is Al.
2. wear-resistant aluminium alloy material as described in claim 1, which is characterized in that the wear-resistant aluminium alloy material is by following quality hundred
Point ratio into being grouped as：
Si：4.85%；
Fe：1.02%；
Cu：2.6%；
Mn：0.25%；
Mg：0.45%；
Zn：0.93%；
Cr：0.07%；
Ni：0.53%；
Ti：0.06%；
Surplus is Al.
3. a kind of method that gear pump floating side plate is prepared using wear-resistant aluminium alloy material described in claims 1 or 22, feature are existed
In：After by the method for compression casting, wear-resistant aluminium alloy material is melted, with die casting machine by side plate die casting by thawing
Wear-resistant aluminium alloy material die casting forms aluminum alloy side panel products.
4. preparation method as described in claim 1, which is characterized in that include the following steps：
Step S1. chooses suitable Si, Fe, Cu, Mn, Mg, Zn, Cr, Ni, Ti, Al and carries out dispensing；
The Al matched is fitted into melting furnace by step S2. to be melted, after Al fusing after, sequentially add Si, Fe, Cu, Mn,
Mg, Zn, Cr, Ni, Ti are stirred melt；Melt liquid level to be dissolved rises to normal value, and melt temperature reaches 700 DEG C simultaneously
When, it opens fire door and carries out slagging-off operation；
Step S3. when melt completed in stove slagging-off operation and ingredient after the assay was approved, temperature is reached to 720-750 DEG C of melt
Releasing is subcontracted in being transferred to, then subcontracted by transport to rotation deaeration zone refine；
After the completion of step S4. refinings, the metaideophone melt into die casting machine holding furnace；It will be melted by side plate die casting using die casting machine
The wear-resistant aluminium alloy material die casting of change.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810057746.4A CN108193094A (en) | 2018-01-22 | 2018-01-22 | Wear-resistant aluminium alloy material for gear pump floating side plate and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810057746.4A CN108193094A (en) | 2018-01-22 | 2018-01-22 | Wear-resistant aluminium alloy material for gear pump floating side plate and preparation method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN108193094A true CN108193094A (en) | 2018-06-22 |
Family
ID=62590032
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| Application Number | Title | Priority Date | Filing Date |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2183220A1 (en) * | 1972-05-04 | 1973-12-14 | Metal Leve Sa | |
| CN1334353A (en) * | 2000-07-26 | 2002-02-06 | 大同轴瓦工业株式会社 | Alluminium bearing alloy |
| CN101539064A (en) * | 2009-04-08 | 2009-09-23 | 重庆三华工业有限公司 | Aluminum alloy engine crankcase without cylinder sleeve |
| CN104087818A (en) * | 2014-06-26 | 2014-10-08 | 宁国市正兴耐磨材料有限公司 | Low-chromium alloy wear-resisting ball and preparation method thereof |
| CN104160049A (en) * | 2012-02-01 | 2014-11-19 | 株式会社Uacj | Aluminum alloy having excellent wear resistance, extrudability, and forging workability |
-
2018
- 2018-01-22 CN CN201810057746.4A patent/CN108193094A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2183220A1 (en) * | 1972-05-04 | 1973-12-14 | Metal Leve Sa | |
| CN1334353A (en) * | 2000-07-26 | 2002-02-06 | 大同轴瓦工业株式会社 | Alluminium bearing alloy |
| CN101539064A (en) * | 2009-04-08 | 2009-09-23 | 重庆三华工业有限公司 | Aluminum alloy engine crankcase without cylinder sleeve |
| CN104160049A (en) * | 2012-02-01 | 2014-11-19 | 株式会社Uacj | Aluminum alloy having excellent wear resistance, extrudability, and forging workability |
| CN104087818A (en) * | 2014-06-26 | 2014-10-08 | 宁国市正兴耐磨材料有限公司 | Low-chromium alloy wear-resisting ball and preparation method thereof |
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Application publication date: 20180622 |