CN107012347A - A kind of high-entropy alloy sintered diamond locking nub - Google Patents
A kind of high-entropy alloy sintered diamond locking nub Download PDFInfo
- Publication number
- CN107012347A CN107012347A CN201710209968.9A CN201710209968A CN107012347A CN 107012347 A CN107012347 A CN 107012347A CN 201710209968 A CN201710209968 A CN 201710209968A CN 107012347 A CN107012347 A CN 107012347A
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- Prior art keywords
- entropy alloy
- locking nub
- preparation
- sintered diamond
- sintering
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Classifications
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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
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/05—Mixtures of metal powder with non-metallic powder
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C26/00—Alloys containing diamond or cubic or wurtzitic boron nitride, fullerenes or carbon nanotubes
-
- 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
-
- 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
- C22C30/04—Alloys containing less than 50% by weight of each constituent containing tin or lead
Abstract
After a kind of high-entropy alloy and diamond precompressed, then the method that pressure sintering makes locking nub is carried out, comprised the following steps：Using Cu Sn, Ni Cr B Si, Fe Cr B Si, NaHCO3High-entropy alloy powder is made through ball milling mixing in prealloy powder; add a certain amount of polyvinyl alcohol water solution and carry out secondary mix with diamond; high-entropy alloy powder per cubic centimeter adds 1.2 ~ 1.5 carats of diamonds; precompressed is base substrate under 100 ~ 250MPa pressure; last to carry out pressure sintering in pressurized sintering furnace under argon gas protection, sintering range is 820 870 DEG C, and pressure is 60 ~ 220 MPa; insulation 2 ~ 8 minutes, is sintered to locking nub.
Description
Technical field
The invention belongs to the manufacture in tool made of superhard material making field, more particularly to sintered diamond locking nub.
Background technology
Diamond abrasive has hardness height, the excellent properties that wearability is good, thermal conductivity is good, therefore diamond tool is in processing
There is long lifespan, efficiency high in terms of hard brittle material, the preparation method of instrument has galvanoplastic, sintering process, method for brazing etc., its
Abrasive particle easily comes off middle plated diamond grinding wheel from tool surfaces in process, causes processing efficiency and the drop of life tools
Mono-layer diamond tool that is low, being made using method for welding, can form enhanced primary treatment between diamond and solder, because
This has the excellent specific properties such as abrasive particle bond strength height, abrasive material exposure height, life tools length, and beneficial to environmental protection, there is wide
General application.But only one layer abrasive particle of single layer soldering diamond tool is restricted its life-span.If led in sintering instrument
Cross and add appropriate active element, occur appropriate interfacial reaction with diamond abrasive grain, not only improve the hold of abrasive particle, and
Multi-layer diamond abrasive particle can effectively improve the life-span of instrument.
High-entropy alloy generally by more than five kinds of element constituent element according to grade atomic ratio or close to etc. after atomic ratio alloy
The alloy of formation, its entropy of mixing is higher than the fusion entropy of alloy, high entropy solid solution phase is generally formed, with good synthesis mechanical property
Energy.But common high-entropy alloy is to use elemental metals powder, and its fusing point is higher, and uses a variety of eutectic alloys of alloying, warp
High-entropy alloy is formed after mechanical mill alloying, wherein being suitable for sintered diamond containing appropriate Cr elements, combination can be used as
Agent is used to manufacture metal base firing skive.
The content of the invention
The purpose of the present invention is the further bond strength for improving diamond abrasive in sintering instrument, not only in Metal Substrate
High-entropy alloy is formed, and uses the various powders such as Cu-Sn, Ni-Cr-B-Si, Fe-Cr-B-Si of alloying to be mixed, is made
The high-entropy alloy containing Cu, Fe, Ni, Cr, Sn must be eventually formed, has the advantages that intensity, toughness are high, solubility of the Cr in Cu
It is extremely low, make to promote Cr to spread to diamond interface in sintering process containing certain Cr, further promote Cr to enter with diamond
Row interfacial reaction, realizes enhanced primary treatment, improves the holding intensity of abrasive particle.Because high-entropy alloy has diffusion velocity slow, most
It is the high-entropy alloy containing certain compound that diamond and high-entropy alloy interface are formed afterwards for carbide, in Metal Substrate.To carry
High chip space, adds appropriate NaHCO3, the compound decomposed in sintering process due to heating, produces CO2Gas
Body, the gas can not be escaped inside emery wheel, eventually form stomata, can accommodate the chip produced in grinding process, so as to improve
Grinding efficiency.
The invention provides a kind of preparation method of high-entropy alloy sintered diamond locking nub, comprise the following steps：
（1）By prealloy powder Cu-Sn, Ni-Cr-B-Si, Fe-Cr-B-Si, NaHCO3By certain mass than 30 ~ 35%：30~35%：
30~35%：Ball milling is high-entropy alloy powder after 1 ~ 3% mass ratio mixing, and every kilogram of high-entropy alloy powder adds 4 ~ 5mL and contained
The aqueous solution of 10% weight polyvinyl；The Particle Sizes mesh number scope of wherein described each prealloy powder is respectively：Cu-
Sn：220~180 μm, Ni-Cr-B-Si：200~150 μm, Fe-Cr-B-Si：300~250 μm, NaHCO3：200~150 μm.
The mass percent of Sn contents is 40-50 wherein in Cu-Sn alloys.Various elements mass percent in wherein Ni-Cr-B-Si
For：Cr is 12-18, and B is 2.5-4.5, and Si is 2.5-4.5, and C is 0.7-1, and remaining is Ni.Various members in wherein Fe-Cr-B-Si
Plain mass percent is：Cr is 13-17, and B is 2.5-4.5, and Si is 2.5-4.5, and C is 0.7-1, and remaining is Fe.Using steel ball
Grinding jar carries out ball milling mixing, and abrading-ball therein is 3: 1 with metal powder mass ratio, and vacuum valve is opened after sealing and vacuumizes 20 ~ 30 points
Clock, planetary ball mill is put into by ball grinder, and rotating speed is 300 ~ 350r/min, swings to 30 ~ 45Hz of frequency, when carrying out ball mill mixing
Between be 30 ~ 40 minutes.
（2）Then high-entropy alloy powder and diamond abrasive are subjected to secondary mix and are referred to as molding mass, secondary mixing is by every
Cubic centimetre high-entropy alloy powder adds the Standard entertion of 1.2 ~ 1.5 carats of diamonds, and in being well mixed under normal temperature, for shaping
Material.
（3）Molding mass is placed in into graphite jig again to be dried, drying parameter be in metal drying oven 80 ~ 100 DEG C enter
Row drying 3-8 min.
（4）Then the molding mass after drying is put into mould and carries out precompressed, preload pressure is 100 ~ 250MPa, referred to as base
Body；
（5）Base substrate is put into metal die, then mould is placed in sintering furnace, using progress pressurization burning in argon atmosphere
It is locking nub after knot, sintering.The concrete technology of pressure sintering is：Pressurize 60 ~ 220 MPa under argon gas protection in pressurized sintering furnace,
Sintering range is 820-870 DEG C, is incubated 2 ~ 8 minutes.
Embodiment
Embodiment 1
1. a kind of preparation method of high-entropy alloy sintered diamond locking nub, including following processing steps：
（1）By prealloy powder Cu-Sn, Ni-Cr-B-Si, Fe-Cr-B-Si, NaHCO3Compare 30% by certain mass：32%：35%：3%
Mass ratio mixing after ball milling be high-entropy alloy powder, every kilogram of high-entropy alloy powder addition 4.5mL contains 10% weight polyethylenes
The aqueous solution of alcohol；The Particle Sizes mesh number scope of wherein described each prealloy powder is respectively：Cu-Sn：220~180 μm,
Ni-Cr-B-Si：200~150 μm, Fe-Cr-B-Si：300~250 μm, NaHCO3：200~150 μm.Wherein in Cu-Sn alloys
The mass percent of Sn contents is 40.Various elements mass percent is in wherein Ni-Cr-B-Si：Cr is 12-18, and B is 2.5-
4.5, Si be 2.5-4.5, and C is 0.7-1, and remaining is Ni.Various elements mass percent is in wherein Fe-Cr-B-Si：Cr is
13-17, B are 2.5-4.5, and Si is 2.5-4.5, and C is 0.7-1, and remaining is Fe.Ball milling mixing is carried out using steel ball grinder, its
In abrading-ball and metal powder mass ratio be 3: 1, vacuum valve is opened after sealing and is vacuumized 20 minutes, ball grinder is put into planetary ball
Grinding machine, rotating speed is 300r/min, swings to frequency 45Hz, and it is 40 minutes to carry out the ball mill mixing time.
（2）Then high-entropy alloy powder and diamond abrasive are subjected to secondary mix and are referred to as molding mass, secondary mixing is by every
Cubic centimetre high-entropy alloy powder adds the Standard entertion of 1.2 carats of diamonds, and is molding mass in being well mixed under normal temperature.
（3）Molding mass is placed in into graphite jig again to be dried, drying parameter be in metal drying oven 100 DEG C dried
Dry 3 min.
（4）Then the molding mass after drying is put into mould and carries out precompressed, preload pressure is 125MPa, referred to as base substrate；
（5）Base substrate is put into metal die, then mould is placed in sintering furnace, using progress pressurization burning in argon atmosphere
It is locking nub after knot, sintering.The concrete technology of pressure sintering is：Pressurize 220 MPa, sintering under argon gas protection in pressurized sintering furnace
Temperature range is 820 DEG C, is incubated 5 minutes.
Embodiment 2
1. a kind of preparation method of high-entropy alloy sintered diamond locking nub, including following processing steps：
（1）By prealloy powder Cu-Sn, Ni-Cr-B-Si, Fe-Cr-B-Si, NaHCO3Compare 32% by certain mass：35%：30%：3%
Mass ratio mixing after ball milling be high-entropy alloy powder, every kilogram of high-entropy alloy powder addition 5mL contains 10% weight polyvinyl
The aqueous solution；The Particle Sizes mesh number scope of wherein described each prealloy powder is respectively：Cu-Sn：220~180 μm,
Ni-Cr-B-Si：200~150 μm, Fe-Cr-B-Si：300~250 μm, NaHCO3：200~150 μm.Wherein in Cu-Sn alloys
The mass percent of Sn contents is 45.Various elements mass percent is in wherein Ni-Cr-B-Si：Cr is 12-18, and B is 2.5-
4.5, Si be 2.5-4.5, and C is 0.7-1, and remaining is Ni.Various elements mass percent is in wherein Fe-Cr-B-Si：Cr is
13-17, B are 2.5-4.5, and Si is 2.5-4.5, and C is 0.7-1, and remaining is Fe.Ball milling mixing is carried out using steel ball grinder, its
In abrading-ball and metal powder mass ratio be 3: 1, vacuum valve is opened after sealing and is vacuumized 30 minutes, ball grinder is put into planetary ball
Grinding machine, rotating speed is 328 r/min, swings to frequency 30Hz, and it is 40 minutes to carry out the ball mill mixing time.
（2）Then high-entropy alloy powder and diamond abrasive are subjected to secondary mix and are referred to as molding mass, secondary mixing is by every
Cubic centimetre high-entropy alloy powder adds the Standard entertion of 1.3 carats of diamonds, and is molding mass in being well mixed under normal temperature.
（3）Molding mass is placed in into graphite jig again to be dried, drying parameter be in metal drying oven 80 DEG C dried
Dry 8 min.
（4）Then the molding mass after drying is put into mould and carries out precompressed, preload pressure is 250MPa, referred to as base substrate；
（5）Base substrate is put into metal die, then mould is placed in sintering furnace, using progress pressurization burning in argon atmosphere
It is locking nub after knot, sintering.The concrete technology of pressure sintering is：Pressurize 220 MPa, sintering under argon gas protection in pressurized sintering furnace
Temperature range is 870 DEG C, is incubated 2 minutes.
Embodiment 3
1. a kind of preparation method of high-entropy alloy sintered diamond locking nub, including following processing steps：
（1）By prealloy powder Cu-Sn, Ni-Cr-B-Si, Fe-Cr-B-Si, NaHCO3Compare 33% by certain mass：33%：33%：1%
Mass ratio mixing after ball milling be high-entropy alloy powder, every kilogram of high-entropy alloy powder addition 4.5mL contains 10% weight polyethylenes
The aqueous solution of alcohol；The Particle Sizes mesh number scope of wherein described each prealloy powder is respectively：Cu-Sn：220~180 μm,
Ni-Cr-B-Si：200~150 μm, Fe-Cr-B-Si：300~250 μm, NaHCO3：200~150 μm.Wherein in Cu-Sn alloys
The mass percent of Sn contents is 50.Various elements mass percent is in wherein Ni-Cr-B-Si：Cr is 12-18, and B is 2.5-
4.5, Si be 2.5-4.5, and C is 0.7-1, and remaining is Ni.Various elements mass percent is in wherein Fe-Cr-B-Si：Cr is
13-17, B are 2.5-4.5, and Si is 2.5-4.5, and C is 0.7-1, and remaining is Fe.Ball milling mixing is carried out using steel ball grinder, its
In abrading-ball and metal powder mass ratio be 3: 1, vacuum valve is opened after sealing and is vacuumized 25 minutes, ball grinder is put into planetary ball
Grinding machine, rotating speed is 350r/min, swings to frequency 35Hz, and it is 35 minutes to carry out the ball mill mixing time.
（2）Then high-entropy alloy powder and diamond abrasive are subjected to secondary mix and are referred to as molding mass, secondary mixing is by every
Cubic centimetre high-entropy alloy powder adds the Standard entertion of 1.5 carats of diamonds, and is molding mass in being well mixed under normal temperature.
（3）Molding mass is placed in into graphite jig again to be dried, drying parameter be in metal drying oven 80 DEG C dried
Dry 6 min.
（4）Then the molding mass after drying is put into mould and carries out precompressed, preload pressure is 100MPa, referred to as base substrate；
（5）Base substrate is put into metal die, then mould is placed in sintering furnace, using progress pressurization burning in argon atmosphere
It is locking nub after knot, sintering.The concrete technology of pressure sintering is：Pressurize 150 MPa, sintering under argon gas protection in pressurized sintering furnace
Temperature range is 820 DEG C, is incubated 7 minutes.
Claims (9)
1. a kind of preparation method of high-entropy alloy sintered diamond locking nub, it is characterised in that described preparation method includes following
Processing step：
Step 1: by prealloy powder Cu-Sn, Ni-Cr-B-Si, Fe-Cr-B-Si, NaHCO3By certain mass than 30 ~ 35%：30~
35%：30~35%：Ball milling is high-entropy alloy powder, every kilogram of high-entropy alloy powder addition 4 ~ 5 after 1 ~ 3% mass ratio mixing
ML contains the aqueous solution of 10% weight polyvinyl；
Step 2: high-entropy alloy powder and diamond abrasive then are carried out into secondary mix is referred to as molding mass；
Dried Step 3: molding mass is placed in into graphite jig again；
Precompressed is carried out Step 4: then the molding mass after drying is put into mould, preload pressure is 100 ~ 250 MPa, is referred to as
Base substrate；
Step 5: base substrate is put into metal die, then mould is placed in sintering furnace, using being added in argon atmosphere
It is locking nub after pressure sintering, sintering.
2. the preparation method of high-entropy alloy sintered diamond locking nub according to claim 1, it is characterised in that：Described is each
The Particle Sizes mesh number scope of prealloy powder is respectively：Cu-Sn：220~180 μm, Ni-Cr-B-Si：200~150 μm,
Fe-Cr-B-Si：300~250 μm, NaHCO3：200~150 μm.
3. the preparation method of high-entropy alloy sintered diamond locking nub according to claim 1, it is characterised in that：Described
The mass percent of Sn contents is 40-50 in Cu-Sn alloys.
4. the preparation method of high-entropy alloy sintered diamond locking nub according to claim 1, it is characterised in that：Described
Various elements mass percent is in Ni-Cr-B-Si：Cr is 12-18, and B is 2.5-4.5, and Si is 2.5-4.5, and C is 0.7-1, its
Remaining is Ni.
5. the preparation method of high-entropy alloy sintered diamond locking nub according to claim 1, it is characterised in that：Described
Various elements mass percent is in Fe-Cr-B-Si：Cr is 13-17, and B is 2.5-4.5, and Si is 2.5-4.5, and C is 0.7-1, its
Remaining is Fe.
6. the preparation method of high-entropy alloy sintered diamond locking nub according to claim 1, it is characterised in that：Described ball
Mill mixing is to carry out ball milling mixing using steel ball grinder, and abrading-ball therein is 3: 1 with metal powder mass ratio, opens true after sealing
Empty valve is vacuumized 20 ~ 30 minutes, and ball grinder is put into planetary ball mill, and rotating speed is 300 ~ 350 r/min, swing to frequency 30 ~
45Hz, it is 30 ~ 40 minutes to carry out the ball mill mixing time.
7. the preparation method of high-entropy alloy sintered diamond locking nub according to claim 1, it is characterised in that：Described two
Secondary mixing is added the Standard entertion of 1.2 ~ 1.5 carats of diamonds by high-entropy alloy powder per cubic centimeter, and in mixing under normal temperature
Uniformly, it is molding mass.
8. the preparation method of high-entropy alloy sintered diamond locking nub according to claim 1, it is characterised in that：Described baking
Trepang number is 80 ~ 100 DEG C of progress drying 3-8 min in metal drying oven.
9. the preparation method of high-entropy alloy sintered diamond locking nub according to claim 1, it is characterised in that：The pressurization
Sinter, concrete technology is：Pressurize 60 ~ 220 MPa under argon gas protection in pressurized sintering furnace, and sintering range is 820-870
DEG C, it is incubated 2 ~ 8 minutes.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107663607A (en) * | 2017-09-12 | 2018-02-06 | 中南大学 | A kind of high-entropy alloy holds composite of abrasive grain and its preparation method and application |
| CN108380892A (en) * | 2018-04-03 | 2018-08-10 | 武汉理工大学 | A kind of ceramics/high-entropy alloy laminated material and preparation method thereof |
| CN109604611A (en) * | 2019-01-09 | 2019-04-12 | 苏州科技大学 | A kind of powder metallurgy prepares the forming method of wear-and corrosion-resistant high-entropy alloy gear |
| CN109623685A (en) * | 2019-01-09 | 2019-04-16 | 苏州科技大学 | A kind of preparation method of metal-ceramic base cubic boron nitride sintering locking nub |
| CN111644629A (en) * | 2020-06-05 | 2020-09-11 | 宿迁学院 | Preparation method of Ni-Cr-B-Si alloy welding wire |
| CN115255368A (en) * | 2022-07-15 | 2022-11-01 | 广东工业大学 | Soft-hard composite metal bond diamond tool and preparation method thereof |
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| CN104399985A (en) * | 2014-12-18 | 2015-03-11 | 广东新劲刚新材料科技股份有限公司 | Preparation method of diamond segment |
| CN105922146A (en) * | 2016-04-22 | 2016-09-07 | 柳州凯通新材料科技有限公司 | Method for preparing metal bond diamond grinding wheel |
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| CN102787267A (en) * | 2012-09-04 | 2012-11-21 | 四川大学 | Multiple boride metal ceramic based on high-entropy alloy adhesion agent and preparation method thereof |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107663607A (en) * | 2017-09-12 | 2018-02-06 | 中南大学 | A kind of high-entropy alloy holds composite of abrasive grain and its preparation method and application |
| CN108380892A (en) * | 2018-04-03 | 2018-08-10 | 武汉理工大学 | A kind of ceramics/high-entropy alloy laminated material and preparation method thereof |
| CN108380892B (en) * | 2018-04-03 | 2019-11-26 | 武汉理工大学 | A kind of preparation method of ceramics/high-entropy alloy laminated material |
| CN109604611A (en) * | 2019-01-09 | 2019-04-12 | 苏州科技大学 | A kind of powder metallurgy prepares the forming method of wear-and corrosion-resistant high-entropy alloy gear |
| CN109623685A (en) * | 2019-01-09 | 2019-04-16 | 苏州科技大学 | A kind of preparation method of metal-ceramic base cubic boron nitride sintering locking nub |
| CN111644629A (en) * | 2020-06-05 | 2020-09-11 | 宿迁学院 | Preparation method of Ni-Cr-B-Si alloy welding wire |
| CN111644629B (en) * | 2020-06-05 | 2022-11-11 | 江苏应用元素科技有限公司 | Preparation method of Ni-Cr-B-Si alloy welding wire |
| CN115255368A (en) * | 2022-07-15 | 2022-11-01 | 广东工业大学 | Soft-hard composite metal bond diamond tool and preparation method thereof |
| CN115255368B (en) * | 2022-07-15 | 2023-08-04 | 广东工业大学 | Diamond tool with soft and hard composite metal binding agent and preparation method thereof |
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