CN106086566B - A kind of chromium base high temperature wear resistant alloy and preparation method thereof - Google Patents
A kind of chromium base high temperature wear resistant alloy and preparation method thereof Download PDFInfo
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- 239000011651 chromium Substances 0.000 title claims abstract description 49
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 47
- 239000000956 alloy Substances 0.000 title claims abstract description 47
- 229910052804 chromium Inorganic materials 0.000 title claims abstract description 26
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 title claims abstract description 22
- 238000002360 preparation method Methods 0.000 title abstract description 12
- 239000003870 refractory metal Substances 0.000 claims abstract description 13
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 12
- 229910052802 copper Inorganic materials 0.000 claims abstract description 11
- 229910052758 niobium Inorganic materials 0.000 claims abstract description 11
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 11
- 229910052715 tantalum Inorganic materials 0.000 claims abstract description 10
- 238000005275 alloying Methods 0.000 claims abstract description 4
- 239000011159 matrix material Substances 0.000 claims abstract description 4
- 229910052751 metal Inorganic materials 0.000 claims abstract description 4
- 239000002184 metal Substances 0.000 claims abstract description 3
- 239000000843 powder Substances 0.000 claims description 26
- 238000005245 sintering Methods 0.000 claims description 25
- 239000000463 material Substances 0.000 claims description 18
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 16
- 229910002804 graphite Inorganic materials 0.000 claims description 16
- 239000010439 graphite Substances 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 14
- 238000000498 ball milling Methods 0.000 claims description 10
- 230000008569 process Effects 0.000 claims description 7
- 238000000227 grinding Methods 0.000 claims description 5
- 238000002791 soaking Methods 0.000 claims description 5
- 239000011812 mixed powder Substances 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 2
- 239000004575 stone Substances 0.000 claims 1
- 239000010949 copper Substances 0.000 description 23
- 239000002131 composite material Substances 0.000 description 7
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 6
- 238000001816 cooling Methods 0.000 description 6
- 238000000280 densification Methods 0.000 description 5
- 229910000765 intermetallic Inorganic materials 0.000 description 5
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 4
- 229910052737 gold Inorganic materials 0.000 description 4
- 239000010931 gold Substances 0.000 description 4
- 229910001068 laves phase Inorganic materials 0.000 description 4
- JKQOBWVOAYFWKG-UHFFFAOYSA-N molybdenum trioxide Chemical compound O=[Mo](=O)=O JKQOBWVOAYFWKG-UHFFFAOYSA-N 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 230000003026 anti-oxygenic effect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 238000002490 spark plasma sintering Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 2
- BERDEBHAJNAUOM-UHFFFAOYSA-N copper(I) oxide Inorganic materials [Cu]O[Cu] BERDEBHAJNAUOM-UHFFFAOYSA-N 0.000 description 2
- KRFJLUBVMFXRPN-UHFFFAOYSA-N cuprous oxide Chemical compound [O-2].[Cu+].[Cu+] KRFJLUBVMFXRPN-UHFFFAOYSA-N 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000010955 niobium Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 229910015667 MoO4 Inorganic materials 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 229910003310 Ni-Al Inorganic materials 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- HPNSNYBUADCFDR-UHFFFAOYSA-N chromafenozide Chemical compound CC1=CC(C)=CC(C(=O)N(NC(=O)C=2C(=C3CCCOC3=CC=2)C)C(C)(C)C)=C1 HPNSNYBUADCFDR-UHFFFAOYSA-N 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 229940112669 cuprous oxide Drugs 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000009527 percussion Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 229910000601 superalloy Inorganic materials 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- CMPGARWFYBADJI-UHFFFAOYSA-L tungstic acid Chemical compound O[W](O)(=O)=O CMPGARWFYBADJI-UHFFFAOYSA-L 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C27/00—Alloys based on rhenium or a refractory metal not mentioned in groups C22C14/00 or C22C16/00
- C22C27/06—Alloys based on chromium
-
- 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
- B22F3/1003—Use of special medium during sintering, e.g. sintering aid
- B22F3/1007—Atmosphere
-
- 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
- B22F3/105—Sintering only by using electric current other than for infrared radiant energy, laser radiation or plasma ; by ultrasonic bonding
-
- 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
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/045—Alloys based on refractory metals
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C30/00—Alloys containing less than 50% by weight of each constituent
- C22C30/02—Alloys containing less than 50% by weight of each constituent containing copper
-
- 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
- B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy
Abstract
The invention discloses a kind of chromium base high temperature wear resistant alloy, the alloy is using refractory metal Cr as matrix, using low-melting-point metal Cu and refractory metal Nb, Ta, W, Mo as alloying and intensified element；Wherein the mass percent of Cu elements in the alloy is 5% 30%；Refractory metal Nb and Ta is at least a kind of, adds up to mass percent to be no more than 10%；Refractory metal W and Mo is at least a kind of, adds up to mass percent to be no more than 16%；Surplus is Cr.Alloy of the present invention has good mechanical property and wear resistance between 800 DEG C to 1100 DEG C, while has relatively low coefficient of friction, the high-temperature wearable part available for high-tech sectors such as Aero-Space, nuclear power station and sophisticated weapons.Invention additionally discloses the preparation method of the alloy.
Description
Technical field
The present invention relates to a kind of chromium base high temperature wear resistant alloy and preparation method thereof.
Background technology
High temperature alloy is widely used in the high-tech sectors such as Aero-Space, nuclear power station and sophisticated weapons.Temperature in use is great
The various performances of alloy are affected, at high temperature（About 1000 DEG C）Alloy with excellent antiwear performance is high-tech sector weight
One of critical material that big equipment is reliable, the stable and long-life is run.In terms of high-temperature and wear-proof, the master of wide coverage at present
If nickel-base composite material, intermetallic compound based composite material and ceramic matric composite.Chinese patent CN103540780B
A kind of preparation method of high-strength nickel base high temperature self lubricating composite material is disclosed, in room temperature to having low friction mill at 900 DEG C
Damage characteristic.Chinese patent CN103540821B discloses a kind of oxidation Zirconium-based block material at high temperature with self-lubricating property
Material.Chinese patent CN101463439B discloses intermetallic Ni-Al compound high temperature self-lubricating composite material, in wide temperature range scope
It is interior that there is relatively low coefficient of friction.PM200 series of high temperature self-lubricating composite can be with nickel disclosed in United States Patent (USP) US5034187
There is relatively low coefficient of friction when cochrome mutually rubs.NASA report PS304 self-lubricating coat in use from room temperature to 650 DEG C with
There is relatively low coefficient of friction when nickel base superalloy mutually rubs.These materials have that elevated temperature strength is relatively low, use temperature range
Not enough, wear resistance at elevated temperature deficiency and the problems such as processing characteristics deficiency.Still lack in the environment of up to 1000 DEG C at present
The high-strength wear-resistant alloy used.
The content of the invention
It is an object of the invention to provide a kind of chromium base high temperature wear resistant alloy and preparation method thereof.
A kind of chromium base high temperature wear resistant alloy, it is characterised in that the alloy is using refractory metal Cr as matrix, with low melting point gold
It is alloying and intensified element to belong to Cu and refractory metal Nb, Ta, W, Mo；The wherein mass percent of Cu elements in the alloy is
5%-30%；Refractory metal Nb and Ta is at least a kind of, adds up to mass percent to be no more than 10%；Refractory metal W and Mo at least one
Kind, add up to mass percent to be no more than 16%；Surplus is Cr.
The preparation method of chromium base high temperature wear resistant alloy as described above, it is characterised in that using discharge plasma sintering technique
（Spark Plasma Sintering, abbreviation SPS）Prepare, comprise the following steps：
1）Weigh Cr, Cu, Nb, Ta, W, Mo powder ball milling is carried out in high energy ball mill and obtain mixed-powder, then by it
It is fitted into graphite jig；
2）Graphite jig is placed in discharge plasma sintering stove and carries out plasma activated sintering, it is cold with stove after the completion of sintering
But the chromium base high temperature wear resistant alloy of block is obtained to room temperature.
The purity of Cr, Cu, Nb, Ta, W, Mo powder is more than 99%, and granularity is less than 0.076mm.
The step 1）Ball-milling Time be 3 ~ 6 hours, ratio of grinding media to material 3:1~8:1.
The graphite jig material is high strength graphite, and compressive strength is more than 70MPa.
The discharge plasma sintering process parameter is：Vacuum is less than 10Pa, and 50 DEG C/min ~ 250 DEG C of programming rate/
Min, sintering temperature are 1240 DEG C ~ 1540 DEG C, soaking time 3min ~ 15min, and moulding pressure is 5MPa ~ 35MPa, DC pulse
Than 12:2~12:10.
The design principle of chromium base high temperature wear resistant alloy of the present invention is as follows：
1st, Cr elements have higher fusing point（1907℃）With good antioxygenic property；Cu is close to its fusing point（1084
℃）When show the characteristic and its oxides copper of soft metal（Cu2O）And cuprous oxide（CuO）With relatively low friction
Coefficient, therefore have the function that the Cu elements compared with low melting point can play reduction coefficient of friction between 800 DEG C to 1100 DEG C, simultaneously
Copper and its oxide can reduce the sticking together phenomenon between frictional interface, strengthen the anti stickness polishing machine of alloy；Refractory metal W and
Mo oxide tungstic acid（WO3）And molybdenum trioxide（MoO3）It is good kollag at high temperature, reduction can be played and rubbed
The effect of coefficient is wiped, the oxide of the oxide and copper of tungsten and molybdenum can form salts substances in friction process（Cu2WO4With
Cu2MoO4）, this kind of material is good kollag at high temperature；These oxides and salts substances are in high temperature friction process
In in friction surface can form continuous composite solid lubricant film, this film can make alloy have excellent wear resistance.
2nd, have between 6 kinds of metallic elements of alloy of the present invention are formed and tool is formed between only Cr-Nb and Cr-Ta
There is the intermetallic compound NbCr of Laves phases2And TaCr2, intermetallic compound is not present between remaining element, in sintering process
In be not in new compound.Laves phase intermetallic compounds have high fusing point and hardness, at high temperature with excellent
Mechanical behavior under high temperature and good antioxygenic property.Therefore alloy of the present invention is in NbCr caused by preparation process situ2
And TaCr2Dispersed precipitate plays dispersion-strengthened action in matrix Cr, while enhances the antioxygenic property of alloy.It is high in alloy
The alloying element of fusing point and Laves phase intermetallic compound the common guarantees intensity of alloy at high temperature, and Laves phases exist
Remain in that very high hardness under high temperature, in alloy the presence of these Hard Inclusions can improve the anti-abrasive wear of alloy at high temperature
Performance.
According to above-mentioned alloy design principle, the fusing point difference great disparity between alloy each element, common hot-pressing sintering technique without
Method realizes the densification sintering of alloy of the present invention and the generation of Laves phases.Discharge plasma sintering technique is to utilize on-off
Formula DC pulse current caused high energy plasma and discharge impact pressure between powder causes material in relatively low temperature
A kind of new method of the lower Quick-forming of degree.Due to the technology have plasma-activated powder particle surface, high-frequency percussion pressure,
The characteristics such as the coupling between Joule heat and electric field diffusion, therefore this technology can be by raw material mixed powder of the present invention
Last Fast Sintering, and being capable of in-situ preparation dispersion-strengtherning phase NbCr in sintering process into the block materials of densification2And TaCr2。
Therefore the present invention uses discharge plasma sintering technique（SPS）To prepare chromium base high temperature wear resistant alloy.
The beneficial effects of the invention are as follows：
Alloy of the present invention remains to keep higher intensity, while conjunction at high temperature between 800 DEG C to 1100 DEG C
Gold surface oxide layer can form continuous solid lubricant film in friction process, so as to realize abrasion resistance excellent under high temperature
Can, while there is relatively low coefficient of friction, compared with the same type of material of open report, have temperature in use height and processing characteristics good
The advantages that.
Embodiment
Embodiment 1
A kind of chromium base high temperature wear resistant alloy Cr70Nb4Ta4Mo8W2Cu12Preparation process is as follows：
1）Cr in mass ratio:Nb:Ta:Mo:W:Cu=70:4:4:8:2:12 weigh purity is less than 0.076mm for 99%, granularity
Cr powder, Nb powder, Ta powder, Mo powder and the W powder of purity 99.5%, granularity less than 0.044mm and purity are 99%, granularity is less than
0.076mm Cu powder；Weighing precision is 0.01 gram.Above-mentioned powder is loaded into high energy ball mill and carries out ball milling, Ball-milling Time is 4 small
When, ratio of grinding media to material 4:1.Then the powder mixed is fitted into compressive strength to be more than in 70MPa graphite jigs, graphite jig inner chamber
Diameter nominal size is 25mm.
2）By step 1）The graphite jig equipped with raw material, which is placed in discharge plasma sintering stove, to be sintered, main work
Skill parameter is：Vacuum is less than 10Pa, 100 DEG C/min of programming rate, and sintering temperature is 1400 DEG C, soaking time 5min, pressurization
Pressure is 20MPa, and DC pulse is than 12:2, the type of cooling is furnace cooling.The chromium base high temperature that densification can be obtained after the demoulding is resistance to
Break-in gold Cr70Nb4Ta4Mo8W2Cu12。
The main performance for the alloy that the present embodiment 1 obtains is as shown in table 1.
Friction and wear test experiment condition is：Load 5N, friction linear velocity are 0.2m/s, and friction pair material is nitridation
Silicon, friction type are ball disc type.
The Cr of table 170Nb4Ta4Mo8W2Cu12 Mechanical property and frictional behaviour
Embodiment 2
A kind of chromium base high temperature wear resistant alloy Cr50Nb6W16Cu28Preparation process is as follows：
1）Cr in mass ratio:Nb:W:Cu=50:6:16:28 weigh the Cr powder that purity is less than 0.076mm for 99%, granularity, pure
To spend for Nb powder of the 99.5%, granularity less than 0.044mm and W powder and purity be 99%, granularity is less than 0.076mm Cu powder；Weigh
Precision is 0.01 gram.Above-mentioned powder is loaded into high energy ball mill and carries out ball milling, Ball-milling Time is 5 hours, ratio of grinding media to material 6:1.So
The powder mixed is fitted into compressive strength more than in 70MPa graphite jigs afterwards, graphite jig intracavity diameter nominal size is
25mm。
2）By step 1）The graphite jig equipped with raw material, which is placed in discharge plasma sintering stove, to be sintered, main work
Skill parameter is：Vacuum is less than 10Pa, 100 DEG C/min of programming rate, and sintering temperature is 1350 DEG C, soaking time 8min, pressurization
Pressure is 25MPa, and DC pulse is than 12:6, the type of cooling is furnace cooling.The chromium base high temperature that densification can be obtained after the demoulding is resistance to
Break-in gold Cr50Nb6W16Cu28。
The main performance for the alloy that the present embodiment 2 obtains is as shown in table 2.
Friction and wear test experiment condition is：Load 5N, friction linear velocity are 0.2m/s, and friction pair material is nitridation
Silicon, friction type are ball disc type.
The Cr of table 250Nb6W16Cu28 Mechanical property and tribological property
Embodiment 3
A kind of chromium base high temperature wear resistant alloy Cr65Nb6Mo10W4Cu15Preparation process is as follows：
1）Cr in mass ratio：Nb：Mo：W：Cu=65:6:10:4:15 weigh the Cr that purity is less than 0.076mm for 99%, granularity
Powder, the Nb powder of purity 99.5%, granularity less than 0.044mm and W powder and purity are 99%, Cu powder of the granularity less than 0.076mm；
Weighing precision is 0.01 gram.Above-mentioned powder is loaded into high energy ball mill and carries out ball milling, Ball-milling Time is 6 hours, ratio of grinding media to material 5:
1.Then the powder mixed is fitted into compressive strength to be more than in 70MPa graphite jigs, graphite jig intracavity diameter nominal size
For 25mm.
2）By step 1）The graphite jig equipped with raw material, which is placed in discharge plasma sintering stove, to be sintered, main work
Skill parameter is：Vacuum is less than 10Pa, 100 DEG C/min of programming rate, and sintering temperature is 1500 DEG C, soaking time 15min, pressurization
Pressure is 25MPa, and DC pulse is than 12:5, the type of cooling is furnace cooling.The chromium base high temperature that densification can be obtained after the demoulding is resistance to
Break-in gold Cr65Nb6Mo10W4Cu15。
The main performance for the alloy that the present embodiment 3 obtains is as shown in table 3.
Friction and wear test experiment condition is：Load 5N, friction linear velocity are 0.2m/s, and friction pair material is nitridation
Silicon, friction type are ball disc type.
The Cr of table 365Nb6Mo10W4Cu15 Mechanical property and tribological property
。
Claims (4)
1. a kind of chromium base high temperature wear resistant alloy, it is characterised in that the alloy is using refractory metal Cr as matrix, with low-melting-point metal
Cu and refractory metal Nb, Ta, W, Mo are alloying and intensified element；Wherein the mass percent of Cu elements in the alloy is 5%-
30%；Refractory metal Nb and Ta is at least a kind of, adds up to mass percent to be no more than 10%；Refractory metal W and Mo is at least a kind of,
Total mass percent is no more than 16%；Surplus is Cr；
The chromium base high temperature wear resistant alloy is prepared using discharge plasma sintering technique, is comprised the following steps：
1）Weigh Cr, Cu, Nb, Ta, W, Mo powder ball milling is carried out in high energy ball mill and obtain mixed-powder, be then loaded into
In graphite jig；
2）Graphite jig is placed in discharge plasma sintering stove and carries out plasma activated sintering, is cooled to the furnace after the completion of sintering
Room temperature obtains the chromium base high temperature wear resistant alloy of block；The discharge plasma sintering process parameter is：Vacuum is less than 10Pa, rises
Warm 50 DEG C/min ~ 250 DEG C of speed/min, sintering temperature are 1240 DEG C ~ 1540 DEG C, soaking time 3min ~ 15min, moulding pressure
For 5MPa ~ 35MPa, DC pulse is than 12:2~12:10.
2. chromium base high temperature wear resistant alloy as claimed in claim 1, it is characterised in that Cr, Cu, Nb, Ta, W, Mo powder
Purity is more than 99%, and granularity is less than 0.076mm.
3. chromium base high temperature wear resistant alloy as claimed in claim 1, it is characterised in that the step 1）Ball-milling Time be 3 ~ 6 small
When, ratio of grinding media to material 3:1~8:1.
4. chromium base high temperature wear resistant alloy as claimed in claim 1, it is characterised in that the graphite jig material is high intensity stone
Ink, compressive strength are more than 70MPa.
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| CN108889954A (en) * | 2018-06-29 | 2018-11-27 | 中国科学院兰州化学物理研究所 | A kind of preparation method of infusibility high-entropy alloy powder |
| CN111607760A (en) * | 2019-11-13 | 2020-09-01 | 哈尔滨理工大学 | M50 steel pulse electron beam irradiation Nb-W-Cr-Mo alloying method |
| CN110983234A (en) * | 2019-12-25 | 2020-04-10 | 陕西科技大学 | NiAl-based bimetal oxide high-temperature lubricating wear-resistant composite coating and preparation method thereof |
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| JPS63118032A (en) * | 1986-11-05 | 1988-05-23 | Mitsubishi Electric Corp | Contact material for vacuum circuit breaker |
| JP2005150032A (en) * | 2003-11-19 | 2005-06-09 | Toshiba Corp | Manufacturing method for contact for vacuum bulb |
| CN102628114A (en) * | 2012-03-28 | 2012-08-08 | 东北大学 | Vacuum copper-based electrical contact composite material containing ceramic phase and preparation method of vacuum copper-based electrical contact composite material |
| CN105018815A (en) * | 2015-07-31 | 2015-11-04 | 陕西斯瑞工业有限责任公司 | High-Cr-content high-pressure-resistance copper-chromium contact material and manufacturing method thereof |
| CN105132726A (en) * | 2015-07-31 | 2015-12-09 | 陕西斯瑞工业有限责任公司 | Copper-chromium contact material suitable for contactor and preparing method of copper-chromium contact material |
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