CN104001595A - High-strength cubic boron nitride wear-resistant composite ball - Google Patents
High-strength cubic boron nitride wear-resistant composite ball Download PDFInfo
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Abstract
The invention discloses a high-strength cubic boron nitride wear-resistant composite ball including a first semi-ball and a second semi-ball. A preparation process of the first semi-ball or the second semi-ball includes the steps: successively putting waste steel, ferrochromium, pig iron, ferromolybdenum, titanium steel and borax into an induction furnace, melting, adding a carbon powder and silica fume, closing a furnace door, and vacuumizing to obtain an alloy liquid, wherein the alloy liquid comprises the components by weight percentage: 1.2-2.1% of carbon, 1.0-1.5% of silicon, 0.9-2.1% of molybdenum, 5-6% of chromium, 1.4-3.6% of titanium, 0.09-0.12% of boron, less than 0.05% of phosphorus, less than 0.06% of sulfur, and the balance iron and impurities; pouring, and tempering to obtain an alloy semi-ball body; stirring evenly a silver powder, a nickel powder, potassium fluoroaluminate, potassium fluoborate, cubic boron nitride and a resin bonder, to obtain a mixed material; and pressing to prepare the first semi-ball and the second semi-ball on the surface. The composite ball has the advantages of high hardness, excellent wear resistance, simple structure, convenient assembly, and convenient recycling and reforging.
Description
Technical field
The present invention relates to high-abrasive material technical field, relate in particular to the wear-resisting composite balls of a kind of high strength cubic boron nitride.
Background technology
Abrading-ball is a kind of abrasive media, is the most serious, the maximum lost material of consumption of wearing and tearing in ball mill, is widely used in the industries such as metallurgy, cement, mine.Due to the restriction of material and Technology for Heating Processing, common abrading-ball surface differs larger with the wearability of heart portion, make the minimizing of abrading-ball diameter in wear process very unbalanced, thereby make the grating of abrading-ball that larger departing from occur, cause thus the decline of the poor or output of the fineness of abrasive.For ensureing fineness and the output of abrasive, in ball mill, must add more abrading-ball or remove and ground few abrading-ball.Now need a kind of hardness high, the wear-resistant ball of anti-wear performance excellence, the breakage rate of minimizing abrading-ball, the service life of prolongation abrading-ball.
Summary of the invention
The technical problem that basic background technology exists, the present invention proposes the wear-resisting composite balls of a kind of high strength cubic boron nitride, has hardness high, anti-wear performance excellence, and also simple in structure, easy to assembly, be convenient to reclaim and forge again.
The wear-resisting composite balls of a kind of high strength cubic boron nitride that the present invention proposes, comprise the first hemisphere, coordinate with described the first hemisphere the second hemisphere of installing, described the first hemisphere comprises the first alloy hemisphere and is coated on the first cbn layer of described the first alloy hemisphere curvature portion, described the second hemisphere comprises the second alloy hemisphere and is coated on the second cbn layer of described the second alloy hemisphere curvature portion, described the first alloy hemisphere is identical with described the second alloy hemisphere component, described the first cbn layer is identical with described the second cubic boron nitride layer component,
Described the first hemisphere or described the second hemisphere adopt following technique preparation:
S1, steel scrap, ferrochrome, the pig iron, molybdenum-iron, titanium steel and borax are put into induction furnace successively, induction furnace temperature rises to 2400-2600 DEG C, after raw material all melts, adds carbon dust and silica flour, close fire door and vacuumize and maintain negative pressure 0.03-0.05kPa, insulation 3-4h makes aluminium alloy;
The constituent content of S2, detection aluminium alloy, each compositions in weight percentage should comprise: carbon 1.2-2.1%, silicon 1.0-1.5%, molybdenum 0.9-2.1%, chromium 5-6%, titanium 1.4-3.6%, boron 0.09-0.12%, phosphorus < 0.05%, sulphur < 0.06%, surplus is iron and inevitable impurity;
S3, described aluminium alloy is come out of the stove and poured into a mould in hemispherical mould, aluminium alloy tapping temperature is 1800-2300 DEG C, and pouring temperature is 1700-2200 DEG C, is cooled to 200-280 DEG C and obtains hemisphere alloy body;
S4, pack hemisphere alloy body into high temperature resistance furnace, be heated to 1100-1200 DEG C, after insulation 5-6h, from high temperature resistance furnace, take out and put into quenching oil, temperature is down to 150 DEG C of fuel-displaced tempering furnaces that pack into when following, is warmed up to 700-800 DEG C, after insulation 3-4h, comes out of the stove and puts into burial pit, the slow cooling time is 24-36h, is cooled to room temperature and obtains the first alloy hemisphere or the second alloy hemisphere;
S5, by weight silver powder 11-23 part, nickel powder 12-21 part, potassium fluoroaluminate 16-24 part, potassium fluoborate 12-18 part, cubic boron nitride 90-105 part and resinoid bond 65-70 part are stirred and obtains mixed material, mixing time is 2-3h, and mixing speed is 20-25rpm;
S6, mixed material and the first alloy hemisphere or the second alloy hemisphere are placed in to mould, mould being put into automatic hydraulic press suppresses again, the temperature of automatic hydraulic press rises to 300-400 DEG C, exert pressure as 0.3-0.45MPa, maintain pressure 12-15min, then pressure rises to 0.5-1.0MPa, maintains pressure 7-10min, then the temperature of automatic hydraulic press is risen to 500-550 DEG C, insulation 3-5h; Again the temperature of automatic hydraulic press is risen to 900-950 DEG C, be cooled to room temperature and obtain the first hemisphere or the second hemisphere after insulation 4-5h, cooling rate is 2-4 DEG C/min.
Preferably, in described the first hemisphere or described the second hemisphere preparation technology's S2, the quality of carbon, silicon, boron meets following functional relation: C=1.2 × Si+1.5 × B+ (0.05%～0.10%).
Preferably, in described the first hemisphere or described the second hemisphere preparation technology's S3, aluminium alloy tapping temperature is 2000-2100 DEG C, and pouring temperature is 1900-2000 DEG C, is cooled to 230-270 DEG C and obtains hemisphere alloy body.
Preferably, in described the first hemisphere or described the second hemisphere preparation technology's S6, the temperature of automatic hydraulic press rises to 330-370 DEG C, exert pressure as 0.33-0.43MPa, maintain pressure 13-14min, then pressure rises to 0.6-0.9MPa, maintains pressure 8-9min, then the temperature of automatic hydraulic press is risen to 510-530 DEG C, insulation 3.5-4.5h; Again the temperature of automatic hydraulic press is risen to 920-930 DEG C, be cooled to room temperature and obtain the first hemisphere or the second hemisphere after insulation 4.2-4.7h, cooling rate is 2.5-3.5 DEG C/min.
Preferably, in described the first hemisphere or described the second hemisphere preparation technology's S5, resinoid bond is phenolic resins or polyamide.
In the time producing various iron or ferroalloy by iron ore, due in iron ore often association have the nonmetallic ore such as phosphorus, sulphur, cause the impurity that contains the element such as phosphorus, sulphur and be difficult to avoid in final iron or ferroalloy.
The present invention adopts double-decker design, and each layer of even structure, makes center of gravity overlap with the centre of sphere, and when work, center of gravity is difficult for sideslip, has improved anti-wear performance; After utilizing two hemisphere to make respectively, install again, make the present invention simple in structure, easy to assembly; The outer cubic boron nitride that adopts is made, increase substantially case hardness of the present invention, reach HRC80-90, extend the service life of the present invention in ball mill, can also reduce the present invention's assembling amount in ball mill, material to be ground in ball mill is increased, and the impulsive force that makes the present invention leave generation is absorbed more abundant by material, reduces the destructive power to rotary drum lining plate; Internal layer adopts steel scrap, ferrochrome, the pig iron, molybdenum-iron, titanium steel and borax to make, and has reduced cost, has also improved the weight of spheroid, makes the present invention very convenient in grinding; By adopting resinoid bond, make cbn layer Stability Analysis of Structures of the present invention densification, but decompose resinoid bond by alkaline solution, be recovered thereby make cubic boron nitride again form powder.
Detailed description of the invention
The wear-resisting composite balls of a kind of high strength cubic boron nitride that the present invention proposes, comprise the first hemisphere, coordinate with described the first hemisphere the second hemisphere of installing, described the first hemisphere comprises the first alloy hemisphere and is coated on the first cbn layer of described the first alloy hemisphere curvature portion, described the second hemisphere comprises the second alloy hemisphere and is coated on the second cbn layer of described the second alloy hemisphere curvature portion, described the first alloy hemisphere is identical with described the second alloy hemisphere component, described the first cbn layer is identical with described the second cubic boron nitride layer component,
Described the first hemisphere or described the second hemisphere adopt following technique preparation:
S1, steel scrap, ferrochrome, the pig iron, molybdenum-iron, titanium steel and borax are put into induction furnace successively, induction furnace temperature rises to 2400-2600 DEG C, after raw material all melts, adds carbon dust and silica flour, close fire door and vacuumize and maintain negative pressure 0.03-0.05kPa, insulation 3-4h makes aluminium alloy;
The constituent content of S2, detection aluminium alloy, each compositions in weight percentage should comprise: carbon 1.2-2.1%, silicon 1.0-1.5%, molybdenum 0.9-2.1%, chromium 5-6%, titanium 1.4-3.6%, boron 0.09-0.12%, phosphorus < 0.05%, sulphur < 0.06%, surplus is iron and inevitable impurity;
S3, described aluminium alloy is come out of the stove and poured into a mould in hemispherical mould, aluminium alloy tapping temperature is 1800-2300 DEG C, and pouring temperature is 1700-2200 DEG C, is cooled to 200-280 DEG C and obtains hemisphere alloy body;
S4, pack hemisphere alloy body into high temperature resistance furnace, be heated to 1100-1200 DEG C, after insulation 5-6h, from high temperature resistance furnace, take out and put into quenching oil, temperature is down to 150 DEG C of fuel-displaced tempering furnaces that pack into when following, is warmed up to 700-800 DEG C, after insulation 3-4h, comes out of the stove and puts into burial pit, the slow cooling time is 24-36h, is cooled to room temperature and obtains the first alloy hemisphere or the second alloy hemisphere;
S5, by weight silver powder 11-23 part, nickel powder 12-21 part, potassium fluoroaluminate 16-24 part, potassium fluoborate 12-18 part, cubic boron nitride 90-105 part and resinoid bond 65-70 part are stirred and obtains mixed material, mixing time is 2-3h, and mixing speed is 20-25rpm;
S6, mixed material and the first alloy hemisphere or the second alloy hemisphere are placed in to mould, mould being put into automatic hydraulic press suppresses again, the temperature of automatic hydraulic press rises to 300-400 DEG C, exert pressure as 0.3-0.45MPa, maintain pressure 12-15min, then pressure rises to 0.5-1.0MPa, maintains pressure 7-10min, then the temperature of automatic hydraulic press is risen to 500-550 DEG C, insulation 3-5h; Again the temperature of automatic hydraulic press is risen to 900-950 DEG C, be cooled to room temperature and obtain the first hemisphere or the second hemisphere after insulation 4-5h, cooling rate is 2-4 DEG C/min.
Embodiment 1
The wear-resisting composite balls of a kind of high strength cubic boron nitride that the present invention proposes, comprise the first hemisphere, coordinate with described the first hemisphere the second hemisphere of installing, described the first hemisphere comprises the first alloy hemisphere and is coated on the first cbn layer of described the first alloy hemisphere curvature portion, described the second hemisphere comprises the second alloy hemisphere and is coated on the second cbn layer of described the second alloy hemisphere curvature portion, described the first alloy hemisphere is identical with described the second alloy hemisphere component, described the first cbn layer is identical with described the second cubic boron nitride layer component,
Described the first hemisphere or described the second hemisphere adopt following technique preparation:
S1, steel scrap, ferrochrome, the pig iron, molybdenum-iron, titanium steel and borax are put into induction furnace successively, induction furnace temperature rises to 2400 DEG C, all after fusing, adds carbon dust and silica flour until raw material, closes fire door and vacuumizes and maintain negative pressure 0.05kPa, and insulation 3h makes aluminium alloy;
The constituent content of S2, detection aluminium alloy, each compositions in weight percentage should comprise: carbon 2.1%, silicon 1.0%, molybdenum 2.1%, chromium 5%, titanium 3.6%, boron 0.09%, phosphorus 0.02%, sulphur 0.03%, surplus is iron and inevitable impurity;
S3, described aluminium alloy is come out of the stove and poured into a mould in hemispherical mould, aluminium alloy tapping temperature is 2300 DEG C, and pouring temperature is 2200 DEG C, is cooled to 280 DEG C and obtains hemisphere alloy body;
S4, pack hemisphere alloy body into high temperature resistance furnace, be heated to 1100 DEG C, after insulation 6h, from high temperature resistance furnace, take out and put into quenching oil, the fuel-displaced tempering furnace that packs into when temperature is down to 147 DEG C, is warmed up to 700 DEG C, after insulation 4h, comes out of the stove and puts into burial pit, the slow cooling time is 24h, is cooled to room temperature and obtains the first alloy hemisphere or the second alloy hemisphere;
S5, by weight 65 parts of 23 parts, silver powder, 12 parts of nickel powders, 24 parts of potassium fluoroaluminates, 12 parts of potassium fluoborates, 105 parts of cubic boron nitrides and resinoid bonds are stirred and obtain mixed material, mixing time is 3h, and mixing speed is 20rpm;
S6, mixed material and the first alloy hemisphere or the second alloy hemisphere are placed in to mould, mould being put into automatic hydraulic press suppresses again, the temperature of automatic hydraulic press rises to 400 DEG C, exert pressure as 0.3MPa, maintain pressure 15min, then pressure rises to 0.5MPa, maintains pressure 10min, then the temperature of automatic hydraulic press is risen to 500 DEG C, insulation 5h; Again the temperature of automatic hydraulic press is risen to 900 DEG C, be cooled to room temperature and obtain the first hemisphere or the second hemisphere after insulation 5h, cooling rate is 2 DEG C/min.
Embodiment 2
The wear-resisting composite balls of a kind of high strength cubic boron nitride that the present invention proposes, comprise the first hemisphere, coordinate with described the first hemisphere the second hemisphere of installing, described the first hemisphere comprises the first alloy hemisphere and is coated on the first cbn layer of described the first alloy hemisphere curvature portion, described the second hemisphere comprises the second alloy hemisphere and is coated on the second cbn layer of described the second alloy hemisphere curvature portion, described the first alloy hemisphere is identical with described the second alloy hemisphere component, described the first cbn layer is identical with described the second cubic boron nitride layer component,
Described the first hemisphere or described the second hemisphere adopt following technique preparation:
S1, steel scrap, ferrochrome, the pig iron, molybdenum-iron, titanium steel and borax are put into induction furnace successively, induction furnace temperature rises to 2600 DEG C, all after fusing, adds carbon dust and silica flour until raw material, closes fire door and vacuumizes and maintain negative pressure 0.03kPa, and insulation 4h makes aluminium alloy;
The constituent content of S2, detection aluminium alloy, each compositions in weight percentage should comprise: carbon 1.2%, silicon 1.5%, molybdenum 0.9%, chromium 6%, titanium 1.4%, boron 0.12%, phosphorus 0.009%, sulphur 0.01%, surplus is iron and inevitable impurity;
S3, described aluminium alloy is come out of the stove and poured into a mould in hemispherical mould, aluminium alloy tapping temperature is 1800 DEG C, and pouring temperature is 1700 DEG C, is cooled to 200 DEG C and obtains hemisphere alloy body;
S4, pack hemisphere alloy body into high temperature resistance furnace, be heated to 1200 DEG C, after insulation 5h, from high temperature resistance furnace, take out and put into quenching oil, the fuel-displaced tempering furnace that packs into when temperature is down to 143 DEG C, is warmed up to 800 DEG C, after insulation 3h, comes out of the stove and puts into burial pit, the slow cooling time is 36h, is cooled to room temperature and obtains the first alloy hemisphere or the second alloy hemisphere;
S5, by weight 70 parts of 11 parts, silver powder, 21 parts of nickel powders, 16 parts of potassium fluoroaluminates, 18 parts of potassium fluoborates, 90 parts of cubic boron nitrides and resinoid bonds are stirred and obtain mixed material, mixing time is 2h, and mixing speed is 25rpm;
S6, mixed material and the first alloy hemisphere or the second alloy hemisphere are placed in to mould, mould being put into automatic hydraulic press suppresses again, the temperature of automatic hydraulic press rises to 300 DEG C, exert pressure as 0.45MPa, maintain pressure 12min, then pressure rises to 1.0MPa, maintains pressure 7min, then the temperature of automatic hydraulic press is risen to 550 DEG C, insulation 3h; Again the temperature of automatic hydraulic press is risen to 950 DEG C, be cooled to room temperature and obtain the first hemisphere or the second hemisphere after insulation 4-5h, cooling rate is 2 DEG C/min.
Embodiment 3
The wear-resisting composite balls of a kind of high strength cubic boron nitride that the present invention proposes, comprise the first hemisphere, coordinate with described the first hemisphere the second hemisphere of installing, described the first hemisphere comprises the first alloy hemisphere and is coated on the first cbn layer of described the first alloy hemisphere curvature portion, described the second hemisphere comprises the second alloy hemisphere and is coated on the second cbn layer of described the second alloy hemisphere curvature portion, described the first alloy hemisphere is identical with described the second alloy hemisphere component, described the first cbn layer is identical with described the second cubic boron nitride layer component,
Described the first hemisphere or described the second hemisphere adopt following technique preparation:
S1, steel scrap, ferrochrome, the pig iron, molybdenum-iron, titanium steel and borax are put into induction furnace successively, induction furnace temperature rises to 2450 DEG C, after raw material all melts, adds carbon dust and silica flour, close fire door and vacuumize and maintain negative pressure 0.035kPa, insulation 3.2h makes aluminium alloy;
The constituent content of S2, detection aluminium alloy, each compositions in weight percentage should comprise: carbon 1.385%, silicon 1%, molybdenum 1.3%, chromium 5.3%, titanium 2%, boron 0.09%, phosphorus 0.01%, sulphur 0.06%, surplus is iron and inevitable impurity;
S3, described aluminium alloy is come out of the stove and poured into a mould in hemispherical mould, aluminium alloy tapping temperature is 2000 DEG C, and pouring temperature is 1900 DEG C, is cooled to 230 DEG C and obtains hemisphere alloy body;
S4, pack hemisphere alloy body into high temperature resistance furnace, be heated to 1130 DEG C, after insulation 5.3h, from high temperature resistance furnace, take out and put into quenching oil, the fuel-displaced tempering furnace that packs into when temperature is down to 140 DEG C, is warmed up to 720 DEG C, after insulation 3.3h, comes out of the stove and puts into burial pit, the slow cooling time is 27h, is cooled to room temperature and obtains the first alloy hemisphere or the second alloy hemisphere;
S5, by weight 67 parts of 13 parts, silver powder, 14 parts of nickel powders, 18 parts of potassium fluoroaluminates, 14 parts of potassium fluoborates, 95 parts of cubic boron nitrides and resinoid bonds are stirred and obtain mixed material, mixing time is 2.3h, and mixing speed is 21rpm;
S6, mixed material and the first alloy hemisphere or the second alloy hemisphere are placed in to mould, mould being put into automatic hydraulic press suppresses again, the temperature of automatic hydraulic press rises to 370 DEG C, exert pressure as 0.33MPa, maintain pressure 14min, then pressure rises to 0.6MPa, maintains pressure 9min, then the temperature of automatic hydraulic press is risen to 510 DEG C, insulation 4.5h; Again the temperature of automatic hydraulic press is risen to 920 DEG C, be cooled to room temperature and obtain the first hemisphere or the second hemisphere after insulation 4.7h, cooling rate is 2.5 DEG C/min.
Embodiment 4
The wear-resisting composite balls of a kind of high strength cubic boron nitride that the present invention proposes, comprise the first hemisphere, coordinate with described the first hemisphere the second hemisphere of installing, described the first hemisphere comprises the first alloy hemisphere and is coated on the first cbn layer of described the first alloy hemisphere curvature portion, described the second hemisphere comprises the second alloy hemisphere and is coated on the second cbn layer of described the second alloy hemisphere curvature portion, described the first alloy hemisphere is identical with described the second alloy hemisphere component, described the first cbn layer is identical with described the second cubic boron nitride layer component,
Described the first hemisphere or described the second hemisphere adopt following technique preparation:
S1, steel scrap, ferrochrome, the pig iron, molybdenum-iron, titanium steel and borax are put into induction furnace successively, induction furnace temperature rises to 2550 DEG C, after raw material all melts, adds carbon dust and silica flour, close fire door and vacuumize and maintain negative pressure 0.045kPa, insulation 3.7h makes aluminium alloy;
The constituent content of S2, detection aluminium alloy, each compositions in weight percentage should comprise: carbon 2.03%, silicon 1.5%, molybdenum 1.9%, chromium 5.7%, titanium 3.3%, boron 0.12%, phosphorus 0.03%, sulphur 0.02%, surplus is iron and inevitable impurity;
S3, described aluminium alloy is come out of the stove and poured into a mould in hemispherical mould, aluminium alloy tapping temperature is 2100 DEG C, and pouring temperature is 2000 DEG C, is cooled to 270 DEG C and obtains hemisphere alloy body;
S4, pack hemisphere alloy body into high temperature resistance furnace, be heated to 1170 DEG C, after insulation 5.7h, from high temperature resistance furnace, take out and put into quenching oil, the fuel-displaced tempering furnace that packs into when temperature is down to 145 DEG C, is warmed up to 770 DEG C, after insulation 3.7h, comes out of the stove and puts into burial pit, the slow cooling time is 34h, is cooled to room temperature and obtains the first alloy hemisphere or the second alloy hemisphere;
S5, by weight 69 parts of 21 parts, silver powder, 20 parts of nickel powders, 22 parts of potassium fluoroaluminates, 17 parts of potassium fluoborates, 103 parts of cubic boron nitrides and polyamides are stirred and obtain mixed material, mixing time is 2.7h, and mixing speed is 23rpm;
S6, mixed material and the first alloy hemisphere or the second alloy hemisphere are placed in to mould, mould being put into automatic hydraulic press suppresses again, the temperature of automatic hydraulic press rises to 330 DEG C, exert pressure as 0.43MPa, maintain pressure 13min, then pressure rises to 0.9MPa, maintains pressure 8min, then the temperature of automatic hydraulic press is risen to 530 DEG C, insulation 3.5h; Again the temperature of automatic hydraulic press is risen to 930 DEG C, be cooled to room temperature and obtain the first hemisphere or the second hemisphere after insulation 4.2h, cooling rate is 3.5 DEG C/min.
Embodiment 5
The wear-resisting composite balls of a kind of high strength cubic boron nitride that the present invention proposes, comprise the first hemisphere, coordinate with described the first hemisphere the second hemisphere of installing, described the first hemisphere comprises the first alloy hemisphere and is coated on the first cbn layer of described the first alloy hemisphere curvature portion, described the second hemisphere comprises the second alloy hemisphere and is coated on the second cbn layer of described the second alloy hemisphere curvature portion, described the first alloy hemisphere is identical with described the second alloy hemisphere component, described the first cbn layer is identical with described the second cubic boron nitride layer component,
Described the first hemisphere or described the second hemisphere adopt following technique preparation:
S1, steel scrap, ferrochrome, the pig iron, molybdenum-iron, titanium steel and borax are put into induction furnace successively, induction furnace temperature rises to 2500 DEG C, after raw material all melts, adds carbon dust and silica flour, close fire door and vacuumize and maintain negative pressure 0.04kPa, insulation 3.5h makes aluminium alloy;
The constituent content of S2, detection aluminium alloy, each compositions in weight percentage should comprise: carbon 1.78%, silicon 1.3%, molybdenum 1.5%, chromium 5.5%, titanium 2.5%, boron 0.1%, phosphorus 0.003%, sulphur 0.004%, surplus is iron and inevitable impurity;
S3, described aluminium alloy is come out of the stove and poured into a mould in hemispherical mould, aluminium alloy tapping temperature is 2050 DEG C, and pouring temperature is 1950 DEG C, is cooled to 250 DEG C and obtains hemisphere alloy body;
S4, pack hemisphere alloy body into high temperature resistance furnace, be heated to 1150 DEG C, after insulation 5.5h, from high temperature resistance furnace, take out and put into quenching oil, the fuel-displaced tempering furnace that packs into when temperature is down to 148 DEG C, is warmed up to 750 DEG C, after insulation 3.5h, comes out of the stove and puts into burial pit, the slow cooling time is 30h, is cooled to room temperature and obtains the first alloy hemisphere or the second alloy hemisphere;
S5, by weight 67 parts, 17 parts, silver powder, 17 parts of nickel powders, 20 parts of potassium fluoroaluminates, 15 parts of potassium fluoborates, 97 parts of cubic boron nitrides and phenolic resins is stirred and obtains mixed material, mixing time is 2.5h, and mixing speed is 22rpm;
S6, mixed material and the first alloy hemisphere or the second alloy hemisphere are placed in to mould, mould being put into automatic hydraulic press suppresses again, the temperature of automatic hydraulic press rises to 350 DEG C, exert pressure as 0.37MPa, maintain pressure 13.5min, then pressure rises to 0.7MPa, maintains pressure 8.5min, then the temperature of automatic hydraulic press is risen to 520 DEG C, insulation 4h; Again the temperature of automatic hydraulic press is risen to 925 DEG C, be cooled to room temperature and obtain the first hemisphere or the second hemisphere after insulation 4.5h, cooling rate is 3 DEG C/min.
The above; it is only preferably detailed description of the invention of the present invention; but protection scope of the present invention is not limited to this; any be familiar with those skilled in the art the present invention disclose technical scope in; be equal to replacement or changed according to technical scheme of the present invention and inventive concept thereof, within all should being encompassed in protection scope of the present invention.
Claims (5)
1. the wear-resisting composite balls of high strength cubic boron nitride, it is characterized in that, comprise the first hemisphere, coordinate with described the first hemisphere the second hemisphere of installing, described the first hemisphere comprises the first alloy hemisphere and is coated on the first cbn layer of described the first alloy hemisphere curvature portion, described the second hemisphere comprises the second alloy hemisphere and is coated on the second cbn layer of described the second alloy hemisphere curvature portion, described the first alloy hemisphere is identical with described the second alloy hemisphere component, described the first cbn layer is identical with described the second cubic boron nitride layer component,
Described the first hemisphere or described the second hemisphere adopt following technique preparation:
S1, steel scrap, ferrochrome, the pig iron, molybdenum-iron, titanium steel and borax are put into induction furnace successively, induction furnace temperature rises to 2400-2600 DEG C, after raw material all melts, adds carbon dust and silica flour, close fire door and vacuumize and maintain negative pressure 0.03-0.05kPa, insulation 3-4h makes aluminium alloy;
The constituent content of S2, detection aluminium alloy, each compositions in weight percentage should comprise: carbon 1.2-2.1%, silicon 1.0-1.5%, molybdenum 0.9-2.1%, chromium 5-6%, titanium 1.4-3.6%, boron 0.09-0.12%, phosphorus < 0.05%, sulphur < 0.06%, surplus is iron and inevitable impurity;
S3, described aluminium alloy is come out of the stove and poured into a mould in hemispherical mould, aluminium alloy tapping temperature is 1800-2300 DEG C, and pouring temperature is 1700-2200 DEG C, is cooled to 200-280 DEG C and obtains hemisphere alloy body;
S4, pack hemisphere alloy body into high temperature resistance furnace, be heated to 1100-1200 DEG C, after insulation 5-6h, from high temperature resistance furnace, take out and put into quenching oil, temperature is down to 150 DEG C of fuel-displaced tempering furnaces that pack into when following, is warmed up to 700-800 DEG C, after insulation 3-4h, comes out of the stove and puts into burial pit, the slow cooling time is 24-36h, is cooled to room temperature and obtains the first alloy hemisphere or the second alloy hemisphere;
S5, by weight silver powder 11-23 part, nickel powder 12-21 part, potassium fluoroaluminate 16-24 part, potassium fluoborate 12-18 part, cubic boron nitride 90-105 part and resinoid bond 65-70 part are stirred and obtains mixed material, mixing time is 2-3h, and mixing speed is 20-25rpm;
S6, mixed material and the first alloy hemisphere or the second alloy hemisphere are placed in to mould, mould being put into automatic hydraulic press suppresses again, the temperature of automatic hydraulic press rises to 300-400 DEG C, exert pressure as 0.3-0.45MPa, maintain pressure 12-15min, then pressure rises to 0.5-1.0MPa, maintain pressure 7-10min, then the temperature of automatic hydraulic press is risen to 500-550 DEG C, insulation 3-5h, again the temperature of automatic hydraulic press is risen to 900-950 DEG C, after insulation 4-5h, be cooled to room temperature and obtain the first hemisphere or the second hemisphere, cooling rate is 2-4 DEG C/min.
2. the wear-resisting composite balls of high strength cubic boron nitride as claimed in claim 1, it is characterized in that, in described the first hemisphere or described the second hemisphere preparation technology's S2, the quality of carbon, silicon, boron meets following functional relation: C=1.2 × Si+1.5 × B+ (0.05%～0.10%).
3. the wear-resisting composite balls of high strength cubic boron nitride as claimed in claim 1, it is characterized in that, in described the first hemisphere or described the second hemisphere preparation technology's S3, aluminium alloy tapping temperature is 2000-2100 DEG C, pouring temperature is 1900-2000 DEG C, is cooled to 230-270 DEG C and obtains hemisphere alloy body.
4. the wear-resisting composite balls of high strength cubic boron nitride as claimed in claim 1, it is characterized in that, in described the first hemisphere or described the second hemisphere preparation technology's S6, the temperature of automatic hydraulic press rises to 330-370 DEG C, exerts pressure as 0.33-0.43MPa, maintains pressure 13-14min, then pressure rises to 0.6-0.9MPa, maintain pressure 8-9min, then the temperature of automatic hydraulic press is risen to 510-530 DEG C, insulation 3.5-4.5h; Again the temperature of automatic hydraulic press is risen to 920-930 DEG C, be cooled to room temperature and obtain the first hemisphere or the second hemisphere after insulation 4.2-4.7h, cooling rate is 2.5-3.5 DEG C/min.
5. the wear-resisting composite balls of high strength cubic boron nitride as claimed in claim 1, is characterized in that, in described the first hemisphere or described the second hemisphere preparation technology's S5, resinoid bond is phenolic resins or polyamide.
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| CN201410182728.0A CN104001595A (en) | 2014-04-30 | 2014-04-30 | High-strength cubic boron nitride wear-resistant composite ball |
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| CN201410182728.0A CN104001595A (en) | 2014-04-30 | 2014-04-30 | High-strength cubic boron nitride wear-resistant composite ball |
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| CN111070111A (en) * | 2019-12-31 | 2020-04-28 | 苏州赛尔科技有限公司 | Ultrathin resin scribing knife for cutting glass wafer and preparation method and application thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111070111A (en) * | 2019-12-31 | 2020-04-28 | 苏州赛尔科技有限公司 | Ultrathin resin scribing knife for cutting glass wafer and preparation method and application thereof |
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