CN104399985B - Preparation method of diamond segment - Google Patents
Preparation method of diamond segment Download PDFInfo
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- CN104399985B CN104399985B CN201410782352.7A CN201410782352A CN104399985B CN 104399985 B CN104399985 B CN 104399985B CN 201410782352 A CN201410782352 A CN 201410782352A CN 104399985 B CN104399985 B CN 104399985B
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Abstract
The invention discloses a preparation method of a diamond segment. The preparation method comprises the following steps in sequence: a certain amount of prealloy powder or elemental metal powder, diamond and additives are weighed and mixed; the diamond segment is formed through pressing; the pressed diamond segment is sintered; and the sintered diamond segment is polished, wherein the sintering is high-temperature continuous sintering. The preparation method of the diamond segment is simple, wide in application range and low in processing cost, the sharpness of a product is good, the production efficiency is high, edge breakage is almost avoided, and automatic batch production can be realized. According to the diamond segment finishing high-temperature continuous sintering, the diamond can be firmly held by the prealloy powder or elemental metal powder matrix, so that the diamond segment has longer service life and higher sharpness, the relative density of the sintered diamond segment can be higher than 90%-98%, and the hardness can reach HRB 100-115.
Description
Technical field
The invention belongs to the preparing technical field of grinding tool, and in particular to a kind of preparation method of diamond block.
Background technology
In the processing with high hardness material such as ceramics, stone material and cutting technique field, diamond drum and diamond
Edging wheel is widely used with its efficient grinding performance.At present, welding diamond drum and gold are mostly used on market
After the diamond block of hard rock edging wheel is mixed with diamond by metal simple-substance powder or alloyed powder, then make through hot pressed sintering
Into.There are problems, such as high energy consumption in its preparation process, graphite jig consumption is big, poor working environment, cost of labor
Height, the adaptation of product are poor, and product sharpness is inadequate etc., and this is unfavorable for that country widelys popularize the works such as energy-saving and emission-reduction and improvement of environment
Make.
Publication No. discloses preparation method and the institute of a kind of novel diamond block for the patent of invention of CN104148652A
The carcass material used.In the invention, the carcass material of diamond block is mainly by tungsten copper ferroalloy powder, Cu15Sn powder
End, Ni powder and Fe powder are made, and its preparation method is：Prepare carcass material and Ti-coated diamond, the two is according to a certain percentage
Mix homogeneously, then compound is mixed homogeneously with paraffin, locking nub blank is obtained, and it is compressing, pressed compact is obtained, pressed compact is loaded
Graphite jig, sinters in vacuum heating-press sintering machine, the form removal after mould cooling, obtains diamond block.Although the gold for preparing
The hardness of hard rock locking nub increases, but graphite jig is still adopted in preparation process, and mould consumption is big, cost
Height, is not suitable for batch production.
Publication No. discloses the reduction that a kind of low-temp low-pressure prepares diamond block for the patent of invention of CN102350501A
Hot-press molding method, according to the requirement of diamond block formula, calculates the matter of each metal simple-substance powder and/or pre-alloyed powder
Amount, and the volume and quality of required diamond；Take the metal simple-substance powder and/or pre-alloyed powder and Buddha's warrior attendant needed for formula
Stone, is molded after mix homogeneously；Pressed compact is loaded in high-temperature resistance die, is first sintered under reducing atmosphere, then is led to
Cross hot forming and obtain diamond block.Although the preparation method of the invention is simple, efficiency high still suffers from many defects,
Mould is adopted such as in preparation process, and mould consumption is big, high cost, and be discontinuous production, so production
Efficiency still has much room for improvement, and the method is not suitable for batch production.
The content of the invention
To solve problems of the prior art, the present invention provides a kind of preparation method of diamond block, according to elder generation
Sequentially comprise the following steps afterwards：
（1）Weigh a certain amount of prealloy powder or elemental metals powder, diamond, additive are mixed；
（2）Compacting diamond block；
（3）The diamond block for suppressing is sintered；
（4）The diamond block for sintering is carried out into grinding process；
It is described to be sintered to high temperature continuous sintering.
The present invention diamond block preparation method, make use of automatically or semi-automatically forcing press first to diamond block
Colded pressing or warm compaction molding, high temperature continuous sintering is carried out by continuous fritting furnace then, and need not in sintering process
Mould.The present invention adopts prealloy powder or elemental metals powder to do carcass, colds pressing or warm compaction molding, in high temperature and reduction protection
Continuous sintering under atmosphere, can obtain the diamond block that sharpness is good, applied widely, processing cost is low.Prepared gold
Hard rock locking nub is applied to diamond drum and diamond edge-abrasive wheel, for stiff materials such as processing ceramic floor tile, stone materials.
Preferably, step（1）In, prealloy powder, diamond, additive mass percent be respectively 85-99%,
0.5-10%、0.1-5%.Through experimental results demonstrate, prealloy powder can be widely used for the preparation former material of diamond block to the present invention
Material, coordinates the proportioning of above-mentioned three kinds of raw materials, the long service life of prepared diamond block, and prealloy powder carcass can be firmly
Diamond is held on, sharpness is good, and the sintering temperature of preparation process is low.
In any of the above-described scheme preferably, step（1）In, elemental metals powder, diamond, the quality percentage of additive
Than being respectively 85-99%, 0.5-10%, 0.1-5%.Through experimental results demonstrate, elemental metals powder can be widely used for Buddha's warrior attendant to the present invention
The proportioning for preparing raw material, coordinating above-mentioned three kinds of raw materials of stone locking nub, the long service life of prepared diamond block are single
Matter metal powder carcass can be gripped tightly diamond, and sharpness is good, and the sintering temperature of preparation process is low.
In any of the above-described scheme preferably, in the prealloy powder, the mass percent of each component is ferrum 1-80%, nickel
1-30%, copper 1-70%, stannum 1-30%, cobalt 0-30%, zinc 0-20%, manganese 0-25%, aluminum 0-10%, phosphorus 0-10%, silicon 0-8%, titanium 0-20%,
Magnesium 0-20%, chromium 0-10%.The present invention is through experimental results demonstrate, using the prealloy powder of above-mentioned each group distribution ratio, obtained
Prealloy powder carcass is higher to the hold of diamond, and sharpness is more preferable, the diamond block cutter head after continuous sintering
Relative density is higher, and mechanical property also accordingly can be improved.
In any of the above-described scheme preferably, in the elemental metals powder, the mass percent of each component is iron powder 1-
80%th, nikel powder 1-30%, copper powder 1-70%, glass putty 1-30%, cobalt powder 0-30%, zinc powder 0-20%, manganese powder 0-25%, aluminium powder 0-20%, phosphorus
Iron powder 0-30%, silica flour 0-8%, titanium valve 0-20%, tungsten carbide 0-30%, chromium powder 0-10%.The present invention is adopted through experimental results demonstrate
With the elemental metals powder of above-mentioned each component proportioning, obtained elemental metals powder carcass is higher to the hold of diamond, sharp
Degree is more preferable, and the relative density of the diamond block cutter head after continuous sintering is higher, and mechanical property also accordingly can be improved.Carbonization
Tungsten has very high hardness and heat stability, and the wearability of the diamond block prepared by the elemental metals powder containing tungsten carbide is more
It is good.
In any of the above-described scheme preferably, the granularity of the prealloy powder is 5-74 μm.The present invention is through a large amount of real
Checking is bright, and when the granularity of prealloy powder is 5-74 μm, which is with diamond, additive can be more full and uniform is blended in one
Rise, compact strength of colding pressing meets the requirements, and sintering activity is strong.
In any of the above-described scheme preferably, in the elemental metals powder, the granularity of each component is 5-74 μm.The present invention
Through experimental results demonstrate, when in elemental metals powder, the granularity of each component is 5-74 μm, which is with diamond, additive can be more
Full and uniform mixes, and compact strength of colding pressing meets the requirements, and sintering activity is strong.
In any of the above-described scheme preferably, the granularity of the diamond is 30/40-170/200 mesh, to adapt to difference
The needs of working condition and processing object.
In any of the above-described scheme preferably, the additive is made up of lubricant and antioxidant.
In any of the above-described scheme preferably, the lubricant is cold pressing lubricant or temperature and pressure lubricant.
In any of the above-described scheme preferably, it is described to cold pressing lubricant for inorganic matters or Organic substance, the inorganic matters
For any one in zinc stearate, graphite, the Organic substance is liquid paraffin.Above-mentioned lubricant of colding pressing has good lubricity
And Squeezing ground, lubricating film can be formed in working surface, so as to reduce coefficient of friction and noise, reduce power consumption, improve product
Quality, improves pressed compact consistency and intensity etc..
In any of the above-described scheme preferably, the temperature and pressure lubricant is powdery Organic substance, and the powdery Organic substance is
The mixture of any one in phenol-formaldehyde resin powder, butylaldehyde group resin-oatmeal, alternatively phenol-formaldehyde resin powder and other resin-oatmeals.Above-mentioned temperature
The chemical stability and good fluidity of pressure lubricating agent, during warm compaction molding can form lubricating film in working surface, can rise
To good lubrication.
In any of the above-described scheme preferably, the antioxidant is sodium sulfite, sodium sulfite, sodium thiosulfate
In any one.Above-mentioned antioxidant can effectively prevent oxidization of metal powder, prevent the activity reduction of metal dust, be conducive to
The carrying out of the compacting and high temperature continuous sintering of diamond block, the relative density and hardness of prepared product are all higher.
In any of the above-described scheme preferably, step（1）In, prealloy powder or elemental metals powder, diamond, addition
The incorporation time of agent is 1-24h, can be mixed in the equipment such as ball mill, blender.The present invention is passed through and be experimental results demonstrate, on
State raw material through 1-24h mixing after, can be full and uniform mix.It is more full and uniform that raw material mixes, and more has
Beneficial to follow-up compacting and the carrying out of continuous sintering process, the relative density of the diamond block of preparation is higher, the power such as hardness
Learn performance also better.
In any of the above-described scheme preferably, step（2）In, suppressed using automatically or semi-automatically forcing press,
Production efficiency is improve, is saved labour turnover, be capable of achieving automatic batch production.
In any of the above-described scheme preferably, the pressing mode of diamond block is to cold pressing or temperature and pressure, it is to avoid useless
Gas is discharged, and reducing energy consumption prevents the pollution of the environment.The temperature of temperature and pressure is 100-300 DEG C.
In any of the above-described scheme preferably, two-way compacting is carried out to diamond block.To the upper and lower of diamond block
Both sides are suppressed simultaneously, can further improve the relative density and hardness of diamond block.
In any of the above-described scheme preferably, the unit area pressure of the forcing press is set to 300-1200MPa, i.e.,
300-1200MPa/m2.The present invention can further improve diamond block pressed compact through experimental results demonstrate under this pressure
Relative density and intensity, while avoiding interiors of products produces the defects such as pore, loose, micro-crack.
In any of the above-described scheme preferably, step（2）In, the pressing weight of single diamond block is 10-80g.
In any of the above-described scheme preferably, step（3）In, the diamond block for suppressing is placed on into sintering charging tray
In, often disk at least places ten diamond blocks.Diamond block should be evenly placed upon in sintering charging tray.
In any of the above-described scheme preferably, high temperature sintering is carried out using continuous fritting furnace.Its sintering velocity is fast, can
Automated production is realized, production efficiency improves decades of times, also energy consumption and artificial usage amount can be preferably minimized, and high-volume
The product quality of production is high, good stability.
In any of the above-described scheme preferably, the continuous fritting furnace is net belt type or push boat type.Net belt type is continuous
The guipure speed of sintering furnace is 5-20mm/s；The speed that pushes away of push boat type continuous fritting furnace is 0.5-3.0mm/s.
In any of the above-described scheme preferably, restitutive protection's atmosphere is passed through in continuous fritting furnace.
In any of the above-described scheme preferably, restitutive protection's atmosphere is the gas of hydrogen or ammonolysis craft.
In any of the above-described scheme preferably, the temperature setting of the continuous fritting furnace be 100-300 DEG C of low-temperature space, in
300-600 DEG C of warm area, 600-1000 DEG C of high-temperature region.
The preparation method of the diamond block of the present invention is simple, product sharpness is good, applied widely, processing cost is low,
Production efficiency is high, be difficult chipping, be capable of achieving automatic batch production.Diamond block after high temperature continuous sintering, it is pre- to close
Bronze or elemental metals powder carcass can be gripped tightly diamond, with longer life-span and higher sharpness, after sintering
The relative density of diamond block can reach more than 90-98%, and hardness can reach HRB 100-115.
Present invention uses automatically or semi-automatically forcing press and continuous fritting furnace, and hot press used in prior art
One mould, one mould is dismounted and discontinuous sintering.It can be seen that the preparation method speed of the present invention is fast, automated production can be realized, by heat
The efficiency of press SINTERING PRODUCTION diamond block cutter head improves as many as decades of times, and waste gas discharge is almost nil, and working environment is excellent,
Energy consumption and artificial usage amount can be preferably minimized, and product quality height, the good stability of production in enormous quantities.
Specific embodiment
In order to be further understood that the content of the invention of the present invention, the present invention is elaborated below in conjunction with specific embodiment.
Embodiment one：
A kind of preparation method of diamond block, comprises the following steps according to sequencing：
（1）A certain amount of prealloy powder, diamond, additive are weighed, and is put into mix homogeneously in ball mill；
（2）Compacting diamond block；
（3）The diamond block for suppressing is carried out into high temperature continuous sintering；
（4）The diamond block for sintering is carried out into grinding process.
Prealloy powder, diamond, the mass percent of additive are respectively 85%, 10%, 5%, during the mixing of three kinds of raw materials
Between be 15h.In prealloy powder, the mass percent of each component is：Ferrum 40%, nickel 15%, copper 30%, stannum 15%.The granularity of prealloy powder
For 5 μm, the granularity of diamond is 30/40 mesh.
Additive is by colding pressing lubricant and antioxidant is constituted.Lubricant of colding pressing is zinc stearate, and antioxidant is sulfurous
Sour sodium.Two-way cold moudling is carried out using automatic press to diamond block, the pressure of forcing press is set to 300MPa/m2。
The pressing weight of single diamond block is 10g, and the diamond block for suppressing uniformly is placed in sintering charging tray, and often disk is put
Put ten.
High temperature continuous sintering is carried out using net belt type continuous fritting furnace to diamond block, guipure speed is 5mm/s.Temperature
Regulation is set to：100 DEG C of low-temperature space, 300 DEG C of middle warm area, 600 DEG C of high-temperature region.It is passed through hydrogen to protect as reduction in continuous fritting furnace
Shield gas.
The relative density of the diamond block prepared through above-mentioned technique is 90%, and hardness is HRB100.
Embodiment two：
A kind of preparation method of diamond block, it is identical with embodiment one, except for the difference that：Prealloy powder, diamond, addition
The mass percent of agent is respectively 99%, 0.5%, 0.5%, and the incorporation time of three kinds of raw materials is 24h.Each component in prealloy powder
Mass percent be：Ferrum 35%, nickel 10%, copper 15%, stannum 10%, phosphorus 5%, silicon 8%, titanium 10%, magnesium 7%.The granularity of prealloy powder is
25 μm, the granularity of diamond is 170/200 mesh.
Additive is by colding pressing lubricant and antioxidant is constituted.Lubricant of colding pressing is graphite, and antioxidant is bisulfite
Sodium.Two-way cold moudling is carried out using automatic press to diamond block, the pressure of forcing press is set to 1200MPa/m2.It is single
The pressing weight of individual diamond block is 80g, and the diamond block for suppressing uniformly is placed in sintering charging tray, and often disk is placed
50.
High temperature continuous sintering is carried out using net belt type continuous fritting furnace to diamond block, guipure speed is 20mm/s.Temperature
Degree regulation is set to：300 DEG C of low-temperature space, 600 DEG C of middle warm area, 1000 DEG C of high-temperature region.Ammonolysis craft gas is passed through in continuous fritting furnace
As reduction protection gas.
The relative density of the diamond block prepared through above-mentioned technique is 98%, and hardness is HRB115.
Embodiment three：
A kind of preparation method of diamond block, it is identical with embodiment one, except for the difference that：Prealloy powder, diamond, addition
The mass percent of agent is respectively 94.9%, 5%, 0.1%, and the incorporation time of three kinds of raw materials is 1h.Each component in prealloy powder
Mass percent is：Ferrum 5%, nickel 30%, copper 20%, stannum 10%, manganese 10%, aluminum 5%, magnesium 20%.The granularity of prealloy powder is 15 μm, gold
The granularity of hard rock is 40/45 mesh.
Additive is by colding pressing lubricant and antioxidant is constituted.Lubricant of colding pressing is liquid paraffin, and antioxidant is sulfurous
Sodium thiosulfate.Two-way cold moudling is carried out using automatic press to diamond block, the pressure of forcing press is set to 800MPa/
m2.The pressing weight of single diamond block is 50g, and the diamond block for suppressing uniformly is placed in sintering charging tray, often
Disk places 100.
High temperature continuous sintering is carried out using net belt type continuous fritting furnace to diamond block, guipure speed is 10mm/s.Temperature
Degree regulation is set to：150 DEG C of low-temperature space, 450 DEG C of middle warm area, 800 DEG C of high-temperature region.Hydrogen is passed through in continuous fritting furnace as reduction
Shielding gas.
The relative density of the diamond block prepared through above-mentioned technique is 95%, and hardness is HRB110.
Example IV：
A kind of preparation method of diamond block, it is identical with embodiment one, except for the difference that：Prealloy powder, diamond, addition
The mass percent of agent is respectively 90%, 8%, 2%, and the incorporation time of three kinds of raw materials is 20h.The matter of each component in prealloy powder
Measuring percentage ratio is：Ferrum 80%, nickel 1%, copper 1%, stannum 1%, cobalt 10%, zinc 7%.The granularity of prealloy powder is 74 μm, the granularity of diamond
For 40/45 mesh.
Additive is by colding pressing lubricant and antioxidant is constituted.Lubricant of colding pressing is zinc stearate, and antioxidant is sulfurous
Sodium thiosulfate.Two-way cold moudling is carried out using automatic press to diamond block, the pressure of forcing press is set to
1000MPa/m2.The pressing weight of single diamond block is 60g, and the diamond block for suppressing uniformly is placed on sintering feed
In disk, often disk places 200.
High temperature continuous sintering is carried out using net belt type continuous fritting furnace to diamond block, guipure speed is 15mm/s.Temperature
Degree regulation is set to：180 DEG C of low-temperature space, 500 DEG C of middle warm area, 900 DEG C of high-temperature region.Hydrogen is passed through in continuous fritting furnace as reduction
Shielding gas.
The relative density of the diamond block prepared through above-mentioned technique is 98%, and hardness is HRB105.
Embodiment five：
A kind of preparation method of diamond block, it is identical with embodiment one, except for the difference that：Prealloy powder, diamond, addition
The mass percent of agent is respectively 96%, 3%, 1%, and the incorporation time of three kinds of raw materials is 10h.The matter of each component in prealloy powder
Measuring percentage ratio is：Ferrum 14%, nickel 4%, copper 70%, stannum 2%, aluminum 10%.The granularity of prealloy powder is 60 μm, and the granularity of diamond is 40/
45 mesh.
Additive is by colding pressing lubricant and antioxidant is constituted.Lubricant of colding pressing is liquid paraffin, and antioxidant is sulfurous
Sodium thiosulfate.Two-way cold moudling is carried out using automatic press to diamond block, the pressure of forcing press is set to 500MPa/
m2.The pressing weight of single diamond block is 40g, and the diamond block for suppressing uniformly is placed in sintering charging tray, often
Disk places 150.
High temperature continuous sintering is carried out using net belt type continuous fritting furnace to diamond block, guipure speed is 18mm/s.Temperature
Degree regulation is set to：120 DEG C of low-temperature space, 400 DEG C of middle warm area, 700 DEG C of high-temperature region.Hydrogen is passed through in continuous fritting furnace as reduction
Shielding gas.
The relative density of the diamond block prepared through above-mentioned technique is 93%, and hardness is HRB112.
Embodiment six：
A kind of preparation method of diamond block, it is identical with embodiment one, except for the difference that：Prealloy powder, diamond, addition
The mass percent of agent is respectively 88%, 8%, 4%, and the incorporation time of three kinds of raw materials is 10h.The matter of each component in prealloy powder
Measuring percentage ratio is：Ferrum 35%, nickel 5%, copper 30%, stannum 10%, zinc 10%, chromium 10%.The granularity of prealloy powder is 12 μm, the grain of diamond
Spend for 40/45 mesh.
Additive is by colding pressing lubricant and antioxidant is constituted.Lubricant of colding pressing is graphite, and antioxidant is bisulfite
Sodium.Two-way cold moudling is carried out using automatic press to diamond block, the pressure of forcing press is set to 400MPa/m2.It is single
The pressing weight of individual diamond block is 80g, and the diamond block for suppressing uniformly is placed in sintering charging tray, and often disk is placed
150.
High temperature continuous sintering is carried out using net belt type continuous fritting furnace to diamond block, guipure speed is 8mm/s.Temperature
Regulation is set to：150 DEG C of low-temperature space, 450 DEG C of middle warm area, 800 DEG C of high-temperature region.It is passed through hydrogen to protect as reduction in continuous fritting furnace
Shield gas.
The relative density of the diamond block prepared through above-mentioned technique is 98%, and hardness is HRB110.
Embodiment seven：
A kind of preparation method of diamond block, comprises the following steps according to sequencing：
（1）A certain amount of prealloy powder, diamond, additive are weighed, and it is uniform to be put into stirrer for mixing；
（2）Compacting diamond block；
（3）The diamond block for suppressing is carried out into high temperature continuous sintering；
（4）The diamond block for sintering is carried out into grinding process.
Prealloy powder, diamond, the mass percent of additive are respectively 85%, 10%, 5%, during the mixing of three kinds of raw materials
Between be 22h.In prealloy powder, the mass percent of each component is：Ferrum 55%, nickel 20%, copper 15%, stannum 10%.The granularity of prealloy powder
For 30 μm, the granularity of diamond is 30/40 mesh.
Additive is made up of temperature and pressure lubricant and antioxidant.Temperature and pressure lubricant is phenol-formaldehyde resin powder, and antioxidant is sub-
Sodium sulfate.Two-way warm compaction molding is carried out using automatic press to diamond block, the temperature of temperature and pressure is 100 DEG C, forcing press
Pressure is set to 900MPa/m2.The pressing weight of single diamond block is 80g, and the diamond block for suppressing uniformly is put
Put in sintering charging tray, often disk places 30.
High temperature continuous sintering is carried out to diamond block using push boat type continuous fritting furnace, speed is pushed away for 0.5mm/s.Temperature is adjusted
Section is set to：100 DEG C of low-temperature space, 300 DEG C of middle warm area, 600 DEG C of high-temperature region.Hydrogen is passed through in continuous fritting furnace as reduction protection
Gas.
The relative density of the diamond block prepared through above-mentioned technique is 90%, and hardness is HRB100.
Embodiment eight：
A kind of preparation method of diamond block, it is identical with embodiment seven, except for the difference that：Prealloy powder, diamond, addition
The mass percent of agent is respectively 96%, 3%, 1%, and the incorporation time of three kinds of raw materials is 18h.The matter of each component in prealloy powder
Measuring percentage ratio is：Ferrum 10%, nickel 5%, copper 50%, stannum 5%, cobalt 25%, chromium 5%.The granularity of prealloy powder is 40 μm, the granularity of diamond
For 40/45 mesh.
Additive is made up of temperature and pressure lubricant and antioxidant.Temperature and pressure lubricant is butylaldehyde group resin-oatmeal, and antioxidant is
Sodium sulfite.Two-way warm compaction molding is carried out using automatic press to diamond block, the temperature of temperature and pressure is 300 DEG C, pressure
The pressure of machine is set to 600MPa/m2.The pressing weight of single diamond block is 80g, will be the diamond block for suppressing equal
Even to be placed in sintering charging tray, often disk places 100.
High temperature continuous sintering is carried out to diamond block using push boat type continuous fritting furnace, speed is pushed away for 3mm/s.Temperature adjustment
It is set to：180 DEG C of low-temperature space, 520 DEG C of middle warm area, 810 DEG C of high-temperature region.Hydrogen is passed through in continuous fritting furnace as reduction protection
Gas.
The relative density of the diamond block prepared through above-mentioned technique is 98%, and hardness is HRB115.
Embodiment nine：
A kind of preparation method of diamond block, it is identical with embodiment seven, except for the difference that：Prealloy powder, diamond, addition
The mass percent of agent is respectively 92%, 3%, 5%, and the incorporation time of three kinds of raw materials is 10h.The matter of each component in prealloy powder
Measuring percentage ratio is：Ferrum 45%, nickel 10%, copper 35%, stannum 10%.The granularity of prealloy powder is 35 μm, and the granularity of diamond is 40/45
Mesh.
Additive is made up of temperature and pressure lubricant and antioxidant.Temperature and pressure lubricant is phenol-formaldehyde resin powder and other resin-oatmeals
Mixture, antioxidant are sodium sulfite.Two-way warm compaction molding, the temperature of temperature and pressure are carried out using automatic press to diamond block
Spend for 200 DEG C, the pressure of forcing press is set to 1100MPa/m2.The pressing weight of single diamond block is 70g, will be suppressed
Diamond block be uniformly placed on sintering charging tray in, often disk places 100.
High temperature continuous sintering is carried out to diamond block using push boat type continuous fritting furnace, speed is pushed away for 2mm/s.Temperature adjustment
It is set to：160 DEG C of low-temperature space, 480 DEG C of middle warm area, 750 DEG C of high-temperature region.Hydrogen is passed through in continuous fritting furnace as reduction protection
Gas.
The relative density of the diamond block prepared through above-mentioned technique is 98%, and hardness is HRB115.
Embodiment ten：
A kind of preparation method of diamond block, it is identical with embodiment seven, except for the difference that：Prealloy powder, diamond, addition
The mass percent of agent is respectively 92%, 3%, 5%, and the incorporation time of three kinds of raw materials is 10h.The matter of each component in prealloy powder
Measuring percentage ratio is：Ferrum 35%, nickel 12%, copper 45%, stannum 8%.The granularity of prealloy powder is 5 μm, and the granularity of diamond is 40/45 mesh.
Additive is made up of temperature and pressure lubricant and antioxidant.Temperature and pressure lubricant is phenol-formaldehyde resin powder, and antioxidant is sub-
Sodium sulfate.Two-way warm compaction molding is carried out using automatic press to diamond block, the temperature of temperature and pressure is 250 DEG C, forcing press
Pressure is set to 850MPa/m2.The pressing weight of single diamond block is 70g, and the diamond block for suppressing uniformly is put
Put in sintering charging tray, often disk places 100.
High temperature continuous sintering is carried out to diamond block using push boat type continuous fritting furnace, speed is pushed away for 1.5mm/s.Temperature is adjusted
Section is set to：160 DEG C of low-temperature space, 480 DEG C of middle warm area, 750 DEG C of high-temperature region.Hydrogen is passed through in continuous fritting furnace as reduction protection
Gas.
The relative density of the diamond block prepared through above-mentioned technique is 98%, and hardness is HRB115.
Embodiment 11：
A kind of preparation method of diamond block, it is identical with embodiment seven, except for the difference that：Prealloy powder, diamond, addition
The mass percent of agent is respectively 92%, 3%, 5%, and the incorporation time of three kinds of raw materials is 10h.The matter of each component in prealloy powder
Measuring percentage ratio is：Ferrum 30%, nickel 20%, copper 35%, stannum 15%.The granularity of prealloy powder is 8 μm, and the granularity of diamond is 40/45 mesh.
Additive is made up of temperature and pressure lubricant and antioxidant.Temperature and pressure lubricant is phenol-formaldehyde resin powder and other resin-oatmeals
Mixture, antioxidant are sodium thiosulfate.Two-way warm compaction molding is carried out to diamond block using automatic press, temperature and pressure
Temperature is 150 DEG C, and the pressure of forcing press is set to 950MPa/m2.The pressing weight of single diamond block is 80g, will compacting
Good diamond block is uniformly placed in sintering charging tray, and often disk places 120.
High temperature continuous sintering is carried out to diamond block using push boat type continuous fritting furnace, speed is pushed away for 2.5mm/s.Temperature is adjusted
Section is set to：160 DEG C of low-temperature space, 550 DEG C of middle warm area, 850 DEG C of high-temperature region.Hydrogen is passed through in continuous fritting furnace as reduction protection
Gas.
The relative density of the diamond block prepared through above-mentioned technique is 98%, and hardness is HRB115.
Embodiment 12：
A kind of preparation method of diamond block, comprises the following steps according to sequencing：
（1）A certain amount of elemental metals powder, diamond, additive are weighed, and is put into mix homogeneously in ball mill；
（2）Compacting diamond block；
（3）The diamond block for suppressing is carried out into high temperature continuous sintering；
（4）The diamond block for sintering is carried out into grinding process.
Elemental metals powder, diamond, the mass percent of additive are respectively 85%, 10%, 5%, the mixing of three kinds of raw materials
Time is 5h.In elemental metals powder, the mass percent of each component is：Iron powder 40%, nikel powder 15%, copper powder 30%, glass putty 15%.It is single
In matter metal powder, the granularity of each component is 5-74 μm, and the granularity of diamond is 30/40 mesh.
Additive is by colding pressing lubricant and antioxidant is constituted.Lubricant of colding pressing is zinc stearate, and antioxidant is sulfurous
Sour sodium.Two-way cold moudling is carried out using automatic press to diamond block, the pressure of forcing press is set to 1100MPa/m2。
The pressing weight of single diamond block is 80g, and the diamond block for suppressing uniformly is placed in sintering charging tray, and often disk is put
Put 80.
High temperature continuous sintering is carried out to diamond block using push boat type continuous fritting furnace, speed is pushed away for 1.0mm/s.Temperature is adjusted
Section is set to：100 DEG C of low-temperature space, 300 DEG C of middle warm area, 600 DEG C of high-temperature region.Hydrogen is passed through in continuous fritting furnace as reduction protection
Gas.
The relative density of the diamond block prepared through above-mentioned technique is 95%, and hardness is HRB112.
Embodiment 13：
A kind of preparation method of diamond block, it is identical with embodiment 12, except for the difference that：Each component in elemental metals powder
Mass percent be：Iron powder 10%, nikel powder 30%, copper powder 20%, glass putty 10%, tungsten carbide 30%.Each component in elemental metals powder
Granularity is 10-55 μm.
Embodiment 14：
A kind of preparation method of diamond block, it is identical with embodiment 12, except for the difference that：Each component in elemental metals powder
Mass percent be：Iron powder 80%, nikel powder 1%, copper powder 1%, glass putty 1%, silica flour 8%, tungsten carbide 9%.Each group in elemental metals powder
The granularity divided is 5-35 μm.
Embodiment 15：
A kind of preparation method of diamond block, it is identical with embodiment 12, except for the difference that：Each component in elemental metals powder
Mass percent be：Iron powder 10%, nikel powder 20%, copper powder 15%, glass putty 30%, manganese powder 25%.The grain of each component in elemental metals powder
Spend for 5-50 μm.
Embodiment 16：
A kind of preparation method of diamond block, comprises the following steps according to sequencing：
（1）A certain amount of elemental metals powder, diamond, additive are weighed, and is put into mix homogeneously in ball mill；
（2）Compacting diamond block；
（3）The diamond block for suppressing is carried out into high temperature continuous sintering；
（4）The diamond block for sintering is carried out into grinding process.
Elemental metals powder, diamond, the mass percent of additive are respectively 85%, 10%, 5%, the mixing of three kinds of raw materials
Time is 12h.In elemental metals powder, the mass percent of each component is：Iron powder 20%, nikel powder 5%, copper powder 70%, glass putty 5%.Simple substance
In metal powder, the granularity of each component is 5-74 μm, and the granularity of diamond is 30/40 mesh.
Additive is made up of temperature and pressure lubricant and antioxidant.Temperature and pressure lubricant is phenol-formaldehyde resin powder, and antioxidant is sub-
Sodium sulfate.Two-way warm compaction molding is carried out using automatic press to diamond block, the temperature of temperature and pressure is 200 DEG C, forcing press
Pressure is set to 950MPa/m2.The pressing weight of single diamond block is 80g, and the diamond block for suppressing uniformly is put
Put in sintering charging tray, often disk places 100.
High temperature continuous sintering is carried out using net belt type continuous fritting furnace to diamond block, guipure speed is 10mm/s.Temperature
Degree regulation is set to：150 DEG C of low-temperature space, 500 DEG C of middle warm area, 800 DEG C of high-temperature region.Hydrogen is passed through in continuous fritting furnace as reduction
Shielding gas.
The relative density of the diamond block prepared through above-mentioned technique is 98%, and hardness is HRB115.
Embodiment 17：
A kind of preparation method of diamond block, it is identical with embodiment 16, except for the difference that：Each component in elemental metals powder
Mass percent be：Iron powder 10%, nikel powder 20%, copper powder 15%, glass putty 30%, tungsten carbide 15%, chromium powder 10%.In elemental metals powder
The granularity of each component is 5-50 μm.
Embodiment 18：
A kind of preparation method of diamond block, it is identical with embodiment 16, except for the difference that：Each component in elemental metals powder
Mass percent be：Iron powder 20%, nikel powder 5%, copper powder 15%, glass putty 30%, ferrophosphorus powder 30%.Each component in elemental metals powder
Granularity is 5-55 μm.
It will be apparent to those skilled in the art that the preparation method of the diamond block of the present invention includes the invention described above explanation
The content of the invention of book and the combination in any of specific embodiment part, as space is limited and for make description concisely without by these
Each scheme that combination is constituted is described one by one.All any modifications within the spirit and principles in the present invention, made, equivalent,
Improve etc., should be included within the scope of the present invention.
Claims (16)
1. a kind of preparation method of diamond block, comprises the following steps according to sequencing：
(1) weigh a certain amount of prealloy powder or elemental metals powder, diamond, additive are mixed；
(2) diamond block is suppressed, pressing mode is to cold pressing or temperature and pressure；
(3) diamond block for suppressing is sintered；
(4) diamond block for sintering is carried out into grinding process；
It is characterized in that：The prealloy powder or elemental metals powder, diamond, the mass percent of additive are respectively 85-
99%th, 0.5-10%, 0.1-5%；The prealloy powder or elemental metals powder, diamond, the incorporation time of additive are 1-
24h；High temperature continuous sintering is carried out using continuous fritting furnace, restitutive protection's atmosphere is passed through in continuous fritting furnace；It is described continuous
Sintering furnace is net belt type or push boat type, and the guipure speed of net belt type continuous fritting furnace is 5-20mm/s, push boat type continuous sintering
The speed that pushes away of stove is 0.5-3.0mm/s；The temperature setting of the continuous fritting furnace is 100-300 DEG C of low-temperature space, middle warm area 300-600
DEG C, 600-1000 DEG C of high-temperature region.
2. the preparation method of diamond block as claimed in claim 1, it is characterised in that：Each component in the prealloy powder
Mass percent is ferrum 1-80%, nickel 1-30%, copper 1-70%, stannum 1-30%, cobalt 0-30%, zinc 0-20%, manganese 0-25%, aluminum
0-10%, phosphorus 0-10%, silicon 0-8%, titanium 0-20%, magnesium 0-20%, chromium 0-10%.
3. the preparation method of diamond block as claimed in claim 1, it is characterised in that：Each component in the elemental metals powder
Mass percent be iron powder 1-80%, nikel powder 1-30%, copper powder 1-70%, glass putty 1-30%, cobalt powder 0-30%, zinc powder 0-
20%th, manganese powder 0-25%, aluminium powder 0-20%, ferrophosphorus powder 0-30%, silica flour 0-8%, titanium valve 0-20%, tungsten carbide 0-30%, chromium
Powder 0-10%.
4. the preparation method of diamond block as claimed in claim 2, it is characterised in that：The granularity of the prealloy powder is 5-
74μm。
5. the preparation method of diamond block as claimed in claim 3, it is characterised in that：Each component in the elemental metals powder
Granularity be 5-74 μm.
6. the preparation method of diamond block as claimed in claim 1, it is characterised in that：The additive is by lubricant and resists
Oxidant is constituted.
7. the preparation method of diamond block as claimed in claim 6, it is characterised in that：The lubricant is lubricant of colding pressing
Or temperature and pressure lubricant.
8. the preparation method of diamond block as claimed in claim 7, it is characterised in that：It is described to cold pressing lubricant for inorganic matters
Or Organic substance, the inorganic matters are zinc stearate, any one in graphite, and the Organic substance is liquid paraffin.
9. the preparation method of diamond block as claimed in claim 7, it is characterised in that：The temperature and pressure lubricant has for powdery
Machine thing, the powdery Organic substance is phenol-formaldehyde resin powder, any one in butylaldehyde group resin-oatmeal.
10. the preparation method of diamond block as claimed in claim 6, it is characterised in that：The antioxidant is sulfurous acid
Any one in sodium, sodium sulfite, sodium thiosulfate.
The preparation method of 11. diamond blocks as claimed in claim 1, it is characterised in that：In step (2), using automatically or
Person's semi-automatic press is suppressed.
The preparation method of 12. diamond blocks as claimed in claim 11, it is characterised in that：Diamond block is carried out two-way
Compacting.
The preparation method of 13. diamond blocks as claimed in claim 11, it is characterised in that：The unit area of the forcing press
Pressure is set to 300-1200MPa.
The preparation method of 14. diamond blocks as claimed in claim 1, it is characterised in that：In step (2), single diamond
The pressing weight of locking nub is 10-80g.
The preparation method of 15. diamond blocks as claimed in claim 1, it is characterised in that：In step (3), by what is suppressed
Diamond block is placed in sintering charging tray, and often disk at least places ten diamond blocks.
The preparation method of 16. diamond blocks as claimed in claim 1, it is characterised in that：Restitutive protection's atmosphere is
The gas of hydrogen or ammonolysis craft.
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| CN105081994B (en) * | 2015-08-07 | 2017-11-14 | 北京安泰钢研超硬材料制品有限责任公司 | Terrace emery wheel and its manufacture method |
| CN105458244A (en) * | 2015-11-30 | 2016-04-06 | 苏州市宝玛数控设备有限公司 | High-strength diamond cutting disk and preparing method thereof |
| CN105458245A (en) * | 2015-11-30 | 2016-04-06 | 苏州市宝玛数控设备有限公司 | Diamond cutting disk and preparing method thereof |
| CN107012347B (en) * | 2017-03-31 | 2018-09-21 | 苏州科技大学 | A kind of high-entropy alloy sintered diamond locking nub |
| CN108687350B (en) * | 2017-04-10 | 2020-10-02 | 江苏锋泰工具有限公司 | Method for preparing diamond tool bit by self-propagating reaction and diamond tool bit |
| CN107326290A (en) * | 2017-05-27 | 2017-11-07 | 苏州铭晟通物资有限公司 | A kind of corrosion-resistant tin iron material |
| CN108130471A (en) * | 2017-12-28 | 2018-06-08 | 唐山为民职业环境检测有限责任公司 | A kind of radiation protection alloy |
| CN108274004B (en) * | 2018-03-02 | 2019-09-17 | 湖北小蚂蚁金刚石工具有限公司 | A kind of metal-base diamond compound tool bit and preparation method thereof and a kind of drill bit |
| CN108504955B (en) * | 2018-05-22 | 2020-12-25 | 东南大学 | High-quality sintered diamond drill bit for processing alumina ceramics and preparation method thereof |
| CN109128145B (en) * | 2018-11-02 | 2020-10-30 | 石家庄海川工具有限公司 | Powder metallurgy material for diamond engineering thin-wall drill bit and preparation method of bit |
| CN109913679B (en) * | 2019-04-15 | 2020-12-01 | 吉林大学 | Low-temperature matrix impregnating material of rock cutting tool and preparation method thereof |
| CN110394901B (en) * | 2019-06-17 | 2021-08-20 | 丹阳市龙威工具有限公司 | Diamond saw blade for bending cutting and preparation process thereof |
| CN111961938B (en) * | 2020-09-11 | 2022-02-18 | 成都新世佳材料科技有限公司 | Application of pure iron-based matrix to preparation of diamond tool bit and preparation method of diamond tool bit |
| CN113600810A (en) * | 2021-08-10 | 2021-11-05 | 泉州众志新材料科技有限公司 | Matrix material for preparing high-cost-performance fine slices and fine slice cutter head |
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| JPH11100660A (en) * | 1997-09-25 | 1999-04-13 | Tosoh Corp | Ito pellet for vapor deposition and its production |
| CN1234369A (en) * | 1999-05-06 | 1999-11-10 | 王保安 | Sub-thermal manufacturing process and sub-thermal forming machine of diamond segment |
| CN102039411A (en) * | 2009-10-24 | 2011-05-04 | 湖北逢金金刚石制品有限公司 | Process for manufacturing diamond block by heating and densifying |
| CN102350501A (en) * | 2011-09-21 | 2012-02-15 | 广东奔朗新材料股份有限公司 | Reduced hot-press forming method for preparing diamond segment at low temperature and under low pressure |
| CN104148652B (en) * | 2014-08-11 | 2017-08-18 | 泉州众志金刚石工具有限公司 | A kind of preparation method of diamond block |
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