CN107866754A - A kind of porous cubic boron nitride abrasive wheel working lining based on graphene combined binder and preparation method thereof - Google Patents
A kind of porous cubic boron nitride abrasive wheel working lining based on graphene combined binder and preparation method thereof Download PDFInfo
- Publication number
- CN107866754A CN107866754A CN201710945890.7A CN201710945890A CN107866754A CN 107866754 A CN107866754 A CN 107866754A CN 201710945890 A CN201710945890 A CN 201710945890A CN 107866754 A CN107866754 A CN 107866754A
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- Prior art keywords
- working lining
- graphene
- boron nitride
- cubic boron
- combined binder
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
- B24D3/02—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D18/00—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for
- B24D18/0009—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for using moulds or presses
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
- B24D3/34—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents characterised by additives enhancing special physical properties, e.g. wear resistance, electric conductivity, self-cleaning properties
- B24D3/342—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents characterised by additives enhancing special physical properties, e.g. wear resistance, electric conductivity, self-cleaning properties incorporated in the bonding agent
Abstract
A kind of porous cubic boron nitride abrasive wheel working lining based on graphene combined binder and preparation method thereof, the stone layer is by Cu Sn Ti composite solderings（10%Ti, 72%Cu, 18%Sn）, graphene particles, ammonium hydrogen carbonate particle, cubic boron nitride abrasive grain composition, preparation method is：By 55wt% 65wt% Cu Sn Ti composite solderings and 5wt% graphene particles, it is well mixed after adding butyral colloidal solution, graphene combined binder is obtained after drying, ball milling, sieving；Graphene combined binder and ammonium hydrogen carbonate particle and cubic boron nitride abrasive grain mechanical mixture is uniform, and working lining blank is made by the unilateral axial 200MPa cold moudlings of mould, pore creating material is removed, porous wheel working lining blank is made；Again porous cubic boron nitride abrasive wheel working lining is formed through vacuum liquid-phase sintering.Obtained perforate cubic boron nitride abrasive wheel working lining has the characteristics such as high porosity, high intensity, good water permeability and thermal conductivity be good concurrently.
Description
Technical field
The invention belongs to super hard abrasive technical field of tools, is prepared more particularly to one kind based on graphene combined binder
The method of perforate cubic boron nitride (Cubic Boron Nitride, abbreviation CBN) stone layer.
Background technology
With extensive use of the difficult-to-machine material such as nickel base superalloy and titanium alloy in Aero-Space manufacturing industry,
Cubic boron nitride (Cubic Boron Nitride, abbreviation CBN) emery wheel is widely used in difficulty as a kind of superhard abrasive material grinding tool
The grinding of rapidoprint.To adapt to the emery wheel occurred in the difficult-to-machine material grinding process using nickel base superalloy as representative
Quick abrasion, the grinding working condition that load is big, grinding temperature is high, CBN emery wheels abrasive material, which removes, in theory need to possess abrasive particle hold
Height, cutting edge are sharp, type face stability is well outer, must also meet the requirement of high intensity and high porosity simultaneously.
At this stage, the CBN emery wheels used both at home and abroad for difficult-to-machine material grinding, the bonding agent species used by it
To divide, mainly there are resin-based prototyping composites, Vitrified Bond CBN Grinding Wheel and Metal-bonded CBN emery wheel (including slug type
Metal-bonded CBN emery wheel, plating metal bonding agent CBN emery wheels and the single layer soldering Metal-bonded CBN sand developed at present
Wheel).Consider that resin-based prototyping composites are mainly big, heat-resisting using elasticity from the bond strength angle of bonding agent and CBN abrasive particles
Property difference phenolic resin material as bonding agent, therefore abrasive particle hold is weak, easy to fall off, and unsuitable heavy load high efficient grinding adds
Work.Vitrified Bond CBN Grinding Wheel band hole so that cutting liquid energy effectively enters grinding arc area, and has larger appearance bits empty
Between, it is not easy to generate heat and block in grinding process, the self-sharpening of emery wheel is fine.But the sintering temperature of Vitrified Bond CBN Grinding Wheel
Height, its intensity and impact resistance are relatively low.And Vitrified Bond CBN Grinding Wheel is that the continuous abrasion for leaning on bonding agent in grinding process comes
From sharp, emery wheel service life is limited.Based on sintering type metal bonding agent CBN emery wheels generally use bronze, iron and nickel alloy etc.
Bonding agent, abrasive material holding intensity is of a relatively high, heatproof good heat conductivity, and service life length, shape retention is good, can bear larger
Load.But traditional Metal-bonded CBN sintering emery wheel is all compact-type, in order to pursue high to abrasive material in its manufacture
Holding force, generally using its consistency as weigh emery wheel workmanship important indicator, cause emery wheel self-sharpening it is poor, easily blocking,
Shaping and dressing at the beginning of use and after abrasion is difficult.
In view of this, in order to further lift grinding during the high tough difficult-to-machine material of Metal-bonded CBN emery wheel processing
Performance, it is still that porous metal binding agent CBN emery wheels were developed to ensure that emery wheel abrasive material has both high porosity and the requirement of high intensity
It is badly in need of the key issue solved in journey.
The content of the invention
The problem of existing for prior art, it is a kind of based on graphene combined binder it is an object of the invention to propose
Porous cubic boron nitride abrasive wheel working lining and preparation method thereof, the intensity and the porosity of Metal-bonded CBN emery wheel, institute can be lifted
Difficult-to-machine material of the efficient precise grinding using nickel base superalloy as representative can be realized by obtaining emery wheel.
To achieve the above object, present invention employs following technical scheme：
A kind of porous cubic boron nitride abrasive wheel working lining based on graphene combined binder, by the compound prickers of Cu-Sn-Ti
Material, graphene particles, sodium bicarbonate particle and CBN abrasive particles burn according to uniform mixing, extrusion forming, heating pore-creating, vacuum liquid phase
Porous C BN stone layers are finally made in the operating procedures such as knot.
Further, the raw material components of described perforate cubic boron nitride abrasive wheel working lining and mass percentage content are：
15%-20% CBN (cubic boron nitride) abrasive particle, 5% graphene particles, 15%-20% ammonium hydrogen carbonate particle, 55%-
65% Cu-Sn-Ti composite solderings；
Further, the mass percentage content of the feed components of described Cu-Sn-Ti composite solderings is：10%Ti,
72%Cu, 18%Sn.
Further, described CBN Abrasive Particle Sizes are 150-180 microns；
Graphene particles use multi-layer graphene (number of plies ＜ 10), and particle size is 3-6 microns；
Ammonium hydrogen carbonate grain shape is irregular, and equivalent diameter is 200-400 microns；
The particle diameter of Cu-Sn-Ti composite soldering particles is 20-30 microns.
The preparation method of porous cubic boron nitride abrasive wheel working lining based on graphene combined binder, first, to Cu-
Graphene combined binder is made in uniform admixed graphite alkene particle in Sn-Ti composite solderings, by pore creating material ammonium hydrogen carbonate and C BN
Abrasive particle is added in graphene combined binder, is molded after being sufficiently mixed uniformly through over pressurizeed, is dried removal pore creating material and vacuum liquid
The steps such as phase sintering are finally made and have high porosity and the perforate CBN stone layers of high intensity concurrently, and increase to a certain extent
The strong water penetration and thermal conductivity of stone layer.
Specifically, comprise the following steps：
(1) graphene and Cu-Sn-Ti composite solderings are well mixed, it is 5wt.%'s to instill the concentration prepared in advance
Butyral colloidal solution, drying, ball milling, sieving after being well mixed, graphene combined binder is made；
(2) CBN abrasive particles and pore creating material ammonium hydrogen carbonate particle are added in graphene combined binder, are well mixed, dress
Enter cold stamping die, be finally made working lining locking nub blank；
(3) obtained working lining locking nub blank is toasted and removes pore creating material ammonium hydrogen carbonate, porous wheel working lining hair is made
Base；
(4) obtained porous wheel working lining blank is placed in vacuum drying oven and is warming up to 880 DEG C of progress vacuum liquid-phase sinterings,
Temperature lift-down curve is：From room temperature to 150 DEG C, 10 minutes are incubated within 10 minutes；Then 600 DEG C are warming up within 45 minutes, insulation 20
Minute；Then 880 DEG C are warming up within 56 minutes, is incubated 30 minutes；Then cool to room temperature with the furnace to come out of the stove, obtained CBN emery wheels work
Make layer locking nub.Possesses the features such as high the perforate porosity, high intensity and thermal conductivity are good.
The beneficial effects of the invention are as follows：
Graphene combined binder, graphite is made in present invention admixed graphite alkene particle uniform into Cu-Sn-Ti composite solderings
Alkene combined binder chemically reacts with CBN abrasive particles during vacuum liquid-phase sintering, improves metallic bond to CBN's
Wetability, while lifting abrasive particle and holding intensity, keep CBN abrasive particles superpower wear-resistant and the characteristics of sharp cutting edge.
Brief description of the drawings
Fig. 1 is CBN stone layer tissue structural representations；
Fig. 2 is CBN stone layer tissue gross blow hole pattern pictorial diagrams；
Fig. 3 is CBN stone layer tissue structure pictorial diagrams prepared by the present invention.
In Fig. 1：1-CBN abrasive particles；2-Cu-Sn-Ti activity tyre body alloys；3- gross blow holes；The micro- stomatas of 4-；5- grinding wheel base bodies
Embodiment：
Embodiment 1
Porous cubic boron nitride abrasive wheel working lining, by Cu-Sn-Ti composite solderings, graphene particles, sodium bicarbonate particle and
CBN abrasive particles 1 are finally made according to operating procedures such as uniform mixing, extrusion forming, heating pore-creating, vacuum liquid-phase sinterings.
Irregular ammonium hydrogen carbonate particle equivalent grain size is 200-400 microns, and its shared overall work layer mass percent is
15%.
It is that 65% (wherein, Ti contents are 10%, Cu, Sn alloy from the mass percent of Cu-Sn-Ti activity tyre body alloy 2
Content is 90%, ratio 4: 1), particle diameter is 20-30 microns.
Graphene particles use multi-layer graphene (number of plies ＜ 10), and particle size is 3-6 microns, mass percent 5%.
The particle diameter of CBN abrasive particles 1 is 150-180 microns, mass percent 15%.
Preparation method is：
(1), graphene and Cu-Sn-Ti composite solderings are well mixed, and instill 1ml butyral colloidal solution, is fully stirred
Constant temperature bellows is inserted after mixing to toast 30 minutes at a temperature of 60 DEG C, mixture is subjected to abundant ball milling, sieving, and graphene is made
Combined binder；
(2), graphene combined binder is mixed with ammonium hydrogen carbonate particle and CBN abrasive particles by mechanical agitation mode
It is even, above-mentioned homogeneous mixture is made by working lining blank by 200MPa one side axial pressure mode；
(3) working lining blank, is placed in into constant temperature bellows at a temperature of 100 DEG C to toast 120 minutes, removes pore creating material carbonic acid
Hydrogen ammonium, porous working lining blank is made；
(4) porous working lining blank vacuum high-temperature, is heated to 880 DEG C and is incubated 30min, is burnt by sufficient liquid phase
Knot, makes Cu-Sn-Ti composite solderings and CBN abrasive particles and graphene particles chemically react, is come out of the stove after being cooled to room temperature.Rise
Temperature lowering curve is：From room temperature to 150 DEG C, 10 minutes are incubated within 10 minutes；Then 600 DEG C are warming up within 45 minutes, is incubated 20 points
Clock；Then 880 DEG C are warming up within 56 minutes, is incubated 30 minutes.
Fig. 1 show the CBN stone layer abrasive particles and stomata arrangement schematic diagram of the preparation of inventive embodiments 1, is not difficult to find out,
By the porosity of ammonium hydrogen carbonate particle preparation up to 60%, and stomata is in irregular shape, and air vent aperture is noticeably greater than metal knot
Mixture emery wheel internal pore structure；Its bending strength is measured more than 80MPa by three point bending test, meets stone layer
High porosity and high intensity requirement.In addition, in working lining locking nub bend test fracture process, section does not find that Grain Falling Off shows
As, it was demonstrated that while bonding agent layer provides high hold to abrasive particle, maintain the sharp cutting edge and superpower wear-resistant of abrasive particle.
Technological parameter used by embodiment 1-4 different from embodiment 1 is as shown in table 1, and remaining unrequited content is the same as real
Apply example 1：
Table 1
It is 5wt.% in graphene addition, in the case that CBN abrasive particle qualities fraction is 15wt.%, adds ammonium hydrogen carbonate
Particle preparation concentration is 100% locking nub sample, and experimental study ammonium hydrogen carbonate particle is to locking nub bending strength and open-cell porosity
Affecting laws.As a result show, ammonium hydrogen carbonate granule content is higher, and locking nub intensity is lower, open-cell porosity is bigger, ammonium hydrogen carbonate
Granule content rises to 20wt.% from 15wt.%, and locking nub intensity is down to 42.6MPa from 83.2MPa, and open-cell porosity increases from 61.2
Add to 76.2vol.%.
When ammonium hydrogen carbonate particle is fixed on 15%-20%, influence of the CBN abrasive particle qualities fraction to performance is investigated, is found
Locking nub bending strength and open-cell porosity are held essentially constant with the increase of CBN abrasive particle quality fractions.
Graphene particles serve as skeleton phase separation in locking nub, and when graphene addition is less than 5wt.%, locking nub without
Method keeps shape before soldering, caves in, and during higher than 5%, then locking nub sample bending strength is greatly lowered, aggravation emery wheel mill
Damage.
Claims (5)
- A kind of 1. porous cubic boron nitride abrasive wheel working lining based on graphene combined binder, it is characterised in that its raw material group Divide and mass percentage content is：15%-20% CBN abrasive particles, 5% graphene particles, 15%-20% ammonium hydrogen carbonate particle, 55%-65% Cu-Sn-Ti composite solderings.
- 2. the porous cubic boron nitride abrasive wheel working lining based on graphene combined binder described in claim 1, its feature exist In：The mass percentage content of the feed components of Cu-Sn-Ti composite solderings is：10%Ti, 72%Cu, 18%Sn.
- 3. the porous cubic boron nitride abrasive wheel working lining based on graphene combined binder described in claim 1, its feature exist In：Described CBN Abrasive Particle Sizes are 150-180 microns；Graphene particles use multi-layer graphene, and particle size is 3-6 microns；Ammonium hydrogen carbonate grain shape is irregular, and equivalent diameter is 200-400 microns；The particle diameter of Cu-Sn-Ti composite soldering particles is 20-30 microns.
- 4. the porous cubic boron nitride abrasive wheel working lining based on graphene combined binder described in claim 1, its feature exist In：The number of plies of graphene particles<10.
- 5. the preparation side of the porous cubic boron nitride abrasive wheel working lining based on graphene combined binder described in claim 1 Method, it is characterised in that comprise the following steps：Step（1）, graphene and Cu-Sn-Ti composite solderings be well mixed, butyral colloidal solution is instilled, after being well mixed Drying, ball milling, sieving, graphene combined binder is made；Step（2）, CBN abrasive particles and pore creating material ammonium hydrogen carbonate particle be added in graphene combined binder, be well mixed, dress Enter cold stamping die, working lining locking nub blank is made；Step（3）, obtained working lining locking nub blank toasted remove pore creating material ammonium hydrogen carbonate, porous wheel working lining hair is made Base；Step（4）, obtained porous wheel working lining blank be placed in vacuum drying oven be warming up to 880 DEG C of progress vacuum liquid phase burnings Knot, temperature lift-down curve are：From room temperature to 150 DEG C, 10 minutes are incubated within 10 minutes；Then 600 DEG C are warming up within 45 minutes, insulation 20 minutes；Then 880 DEG C are warming up within 56 minutes, is incubated 30 minutes；Then cool to room temperature with the furnace to come out of the stove, obtained CBN emery wheels Working lining locking nub.
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| CN111251200A (en) * | 2020-02-06 | 2020-06-09 | 成都飞机工业（集团）有限责任公司 | Metal composite bonding agent diamond grinding wheel based on molybdenum disulfide and open pores and preparation method thereof |
| CN111775069A (en) * | 2020-07-22 | 2020-10-16 | 太原理工大学 | Honing wheel matrix coating CBN abrasive particles, binder for fixing brazing filler metal and preparation method thereof |
| CN113084717A (en) * | 2021-04-08 | 2021-07-09 | 华侨大学 | Porous Cu-Sn-based ultrathin grinding wheel for cutting chip and preparation method thereof |
| CN114850732A (en) * | 2022-06-21 | 2022-08-05 | 齐齐哈尔大学 | Preparation method of graphene-reinforced tin-based composite solder |
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Application publication date: 20180403 |