CN105039824B - Diamond circular saw blade cutter head and preparation method thereof - Google Patents
Diamond circular saw blade cutter head and preparation method thereof Download PDFInfo
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- CN105039824B CN105039824B CN201510358870.0A CN201510358870A CN105039824B CN 105039824 B CN105039824 B CN 105039824B CN 201510358870 A CN201510358870 A CN 201510358870A CN 105039824 B CN105039824 B CN 105039824B
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Abstract
The invention discloses a kind of diamond circular saw blade cutter head and preparation method thereof.The cutter head is formed by diamond particles and for the carcass powder of consolidated diamond particle, and wherein carcass powder is composed of the following components by mass percentage:Fe 40%~80%, Cu 15%~30%, Ni 0%~10%, Sn 2%~8%, Co0%~10%, Me 0%~5%, remaining is inevitable impurity, and Me is selected from least one of Mn, Ti, Si, Cr, P, Al.The preparation method includes batch mixing, cold-press moulding, free sintering step.This method operation is succinct, it is possible to prevente effectively from the graphite jig loss brought during hot pressed sintering, reduce manufacturing cost, batch production and the production of complicated shape cutter head can be met simultaneously, improve production efficiency, life tools approach with the instrument that hot pressing sintering method is manufactured, and produce excellent diamonds cutting element in the case of may be implemented in low input, it is easy to Industry Promotion.
Description
Technical field
The present invention relates to superhard material field, more particularly to a kind of diamond circular saw blade cutter head and preparation method thereof.
Background technology
The diamond tool overwhelming majority is to mix binding agent with synthetic diamond particles, shaped, sintering
Impregnated type instrument.Diamond particles primarily serve the effect of cutting edge, and carcass bonding agent primarily serves fixed diamond particle
Effect, substantially efficiently to play cutting, the ablation of diamond particles, with its superior cutting, grinding and the property such as wear-resisting
It can be widely used in the industries such as stone material, ceramics, concrete.
Impregnated type diamond segment is typically that diamond particles and carcass bonding agent are direct in parameters such as certain mass ratios
Mixing, also can be first through cold moudling again through hot-forming, in a word at present then through hot-forming, most of impregnated type diamonds
Saw blade is all that this technique is made by hot pressed sintering.Hot pressing is only applicable to the sample of sintered shape rule, and less efficient,
Also have the shortcomings that high energy consumption, labour intensive, graphite jig are lost simultaneously.
Freely sinter (Free Sinter), also known as pressureless sintering, a setting will be had under normal pressure (0.1MPa) by referring to
Fine and close, hard, volume stability, tool is made through high-temperature calcination, physical-chemical reaction under vacuum (or atmosphere protection) in the blank of shape
There is the process of the induration of certain performance.Have the advantages that production capacity is high, energy consumption is low, automaticity is higher, the letter of its operating method
It is clean, it is with low cost, production in enormous quantities can be met, excellent diamonds cutting element is produced in the case of may be implemented in low input,
It is easy to Industry Promotion.Meanwhile, free sintering process, can efficiently, facility prepare complex-shaped cutter head.
Free sintering process is widely used in the heat treatment of ceramic material, porous metal material, in diamond tool
In application study report it is less.Mainly due to no impressed pressure as reacting driving force, the knife in free sintering process
The conformality of head is generally difficult to control, it is difficult to accomplish that size uniform shrinks.The hardness of gained cutter head carcass is freely sintered simultaneously, caused
Cutter head prepared by density ratio hot-pressing sintering technique is low, and its performance, life-span are low compared with hot pressed sintering cutter head in use, generally
It is only used in low-grade monoblock type sintered saw bits, the application in high-grade saw blade is rarely reported.
The content of the invention
For the defect of prior art, it is an object of the invention to provide a kind of diamond circular saw blade cutter head and its preparation side
Method.The composition of the saw blade cutter head is adapted to prepare using free sintering process, and this method can improve the production effect of instrument in addition
Rate, and reduction production cost.
To reach above-mentioned purpose, the present invention provides following technical scheme:
A kind of diamond circular saw blade cutter head, the cutter head is by diamond particles and for consolidating the carcasses of the diamond particles
Powder is formed, wherein the carcass powder is composed of the following components by mass percentage:Cu 15%~30%, Ni 0%~
10%, Sn 2%~8%, Co 0%~10%, Me 0%~5%, remaining is Fe and inevitable impurity, and Me is selected from
At least one of Mn, Ti, Si, Cr, P, Al.
In above-mentioned diamond circular saw blade cutter head, as a kind of preferred embodiment, Fe quality in the carcass powder
Percentage is 40-80%, more preferably 50%~70%.
In above-mentioned diamond circular saw blade cutter head, as a kind of preferred embodiment, Cu quality in the carcass powder
Percentage is 20%~30%.
In above-mentioned diamond circular saw blade cutter head, as a kind of preferred embodiment, Ni quality in the carcass powder
Percentage is 2%~8%.
In above-mentioned diamond circular saw blade cutter head, as a kind of preferred embodiment, Sn quality in the carcass powder
Percentage is 2%~5%.
In above-mentioned diamond circular saw blade cutter head, as a kind of preferred embodiment, Co quality in the carcass powder
Percentage is 0%~5%.
In above-mentioned diamond circular saw blade cutter head, a kind of preferred embodiment, the middle position of the carcass powder particle are used as
Footpath D50 is 15~40 μm, wherein the meso-position radius D50 is determined by laser granulometer.
In above-mentioned diamond circular saw blade cutter head, a kind of preferred embodiment, the meso-position radius of the diamond particles are used as
D50 is 30~45 μm.
In above-mentioned diamond circular saw blade cutter head, as a kind of preferred embodiment, the diamond particles account for the gold
The mass percent of hard rock saw blade cutter head is 1.5%~4%.
A kind of preparation method of above-mentioned diamond circular saw blade cutter head, comprises the following steps:
Batch mixing step:Above-mentioned carcass powder is well mixed with diamond particles, granulating agent is then added and continues to mix equal
It is even;
Cold-press moulding step:The mixed material for obtaining the batch mixing step according to powder amount set in advance, which loads, have been assembled
Good pressing die intracavitary, mould is stripped after being suppressed through press, and cold pressing green compact are made;
Free sintering step:The cold pressing green compact are placed in heating furnace cool down after free sintering and taken out, are made
The diamond circular saw blade cutter head finished product.
In above-mentioned preparation method, as a kind of preferred embodiment, in the batch mixing step, required batch mixing it is total when
Between be 1-2h.
In above-mentioned preparation method, as a kind of preferred embodiment, the carcass powder is Prealloyed carcass powder.
In above-mentioned preparation method, a kind of preferred embodiment, in the cold-press moulding step, the press pressure are used as
The pressure of system is 250~550MPa, and the dwell time is 10~15s.
It is described freely to burn in the free sintering step as a kind of preferred embodiment in above-mentioned preparation method
The maximum temperature of knot is 850~950 DEG C, and sintering atmosphere is vacuum or protective atmosphere (such as Ar, N2、H2Deng), sintering total time be
6-10h.It is highly preferred that in the free sintering step, the speed for being warming up to the maximum temperature is 100-200 DEG C/h,
Soaking time is 1-2h under the conditions of maximum temperature.
In above-mentioned preparation method, as a kind of preferred embodiment, in the free sintering step, the cooling is
Refer to natural cooling or Ar air quenchings are cold.
Compared with prior art, the present invention has advantages below:On the basis of traditional diamond segment formula Fe, Cu
It with the addition of the alloying elements such as Ni, Sn, Ti, Cr, Al.On the one hand the alloy melting point of carcass can be reduced, agglutinating property and change can be improved
Shape;On the other hand wellability of the carcass to diamond can be improved.Two aspects complement each other, and help to lift diamond matrix
Performance in free sintering process.Meanwhile, using free sintering process, sintering process is without impressed pressure, operating method letter
It is clean, it is possible to prevente effectively from the problems such as the graphite jig loss brought during hot pressed sintering, high energy consumption, reducing diamond tool system
Cause this, while batch production and the production of complicated shape cutter head can be met, improve diamond tool production efficiency, life tools with
The instrument of hot pressing sintering method manufacture is approached, and excellent diamonds cutting element is produced in the case of may be implemented in low input, it is easy to
Industry Promotion.
Using cutter head, consistency made from carcass powder formula of the present invention and preparation technology>97%, HRB hardness>100, resist
Curved intensity>1000MPa.
Embodiment
Using embodiment, the present invention is described in detail below, but the present invention is not limited thereto.
The diamond circular saw blade cutter head that the present invention is provided, by diamond particles and for consolidating the tires of the diamond particles
Two kinds of raw materials of body powder are formed, the design of carcass powder component of the invention, and one is the demand for considering to meet free sintering process,
I.e. good cold-press moulding and sintering shrinkage, allow it to ensure when no impressed pressure is as reacting driving force, according to
So can sintering densification;Two be the performance for being considered as diamond tool, i.e. the holding to diamond and wearability, should be insolently
In the thermal pressing sintering diamond tool of same class.Based on both considerations, carcass powder of the invention by mass percentage by
Following components is constituted:Cu 15%~30%, Ni 0%~10%, Sn 2%~8%, Co 0%~10%, Me 0%~5%,
Remaining is Fe and inevitable impurity, and Me is selected from least one of Mn, Ti, Si, Cr, P, Al.
Fe, Cu, Ni, Sn, Co component are preferably by mass percentage in carcass powder of the present invention:Fe:40%~80% (ratio
Such as 42%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, 78%), Cu:20%~30% (such as 21%, 25%,
28%), Ni:2%~8% (such as 3%, 4%, 5%, 6%, 7%), Sn:2%~5% (such as 3%, 4%, 4.5%), Co:
0%~5% (such as 1%, 2%, 3%, 4%, 4.5%).It is highly preferred that Fe mass percentage content is 50-70%.
In the present invention, carcass powder can be the mixed powder of each component powder, or Prealloyed carcass powder, but
Due to the carcass powder of the present invention, to be related to constituent species more, therefore to avoid occurring segregation in batch mixing, preferably carcass powder
For Prealloyed carcass powder.The Prealloyed carcass powder is prepared using the conventional water atomization in this area.
It is matrix element from Fe, one is due to that its is inexpensive, and two be its wellability to diamond in above-mentioned carcass powder
It is good, can improve hold of the carcass to diamond during sintering to the slight etching of diamond, three be Fe linear expansion coefficient compared with
Other metals can prevent occurring crackle in cooling procedure closer to the linear expansion coefficient of diamond;The addition of Cu elements, enhancing
Carcass obdurability;Ni, Co are added as hardening constituent element, but consider price factor, and present invention design addition is no more than
10wt%;Sn elements can form Fe-Sn and Cu-Sn compounds, and liquid phase is formed during sintering shrinks carcass, while reducing sintering
Can cause in carcass hard crisp phase excessive after temperature, but excess, influence life tools, the present invention be limited in 2wt%~
8wt%, preferably 2wt%~5wt%.
Me is hardening constituent and infiltrates phase element, and Me is except the obdurability and wear-resisting matching of regulation sintering carcass in the present invention
Outside, moreover it is possible to improve wellability, hold of the carcass to diamond is improved.But one side Ti, Cr is expensive, another aspect Al, P
Carcass mechanical strength can be excessively reduced Deng element such as addition, therefore control Me mass percents are no more than 5wt%.
The meso-position radius D50 of the carcass powder particle is preferably 15~40 μm of (such as 18 μm, 20 μm, 25 μm, 30 μm, 35 μ
M, 40 μm), wherein the meso-position radius D50 is determined by laser granulometer.The meso-position radius D50 of the diamond particles is 30~45
μm (such as 32 μm, 35 μm, 38 μm, 40 μm, 42 μm, 44 μm), diamond particles meso-position radius D50 measure is also using laser grain
Degree meter is determined.
In the cutter head of the present invention, diamond particles account for the mass percent of diamond circular saw blade cutter head for 1.5%~
4%, such as it is 2%, 2.5%, 3%, 3.5%.
The preparation method of cutter head of the present invention uses free sintering process, specific as follows:
Batch mixing step:Above-mentioned carcass powder (being preferred to use above-mentioned Prealloyed carcass powder) is mixed with diamond particles
0.5~1h makes it uniform, and then adding 0.5~1h of appropriate granulating agent continuation mixing makes it uniform, wherein, diamond particles
The percentage ratio that quality accounts for carcass powder and diamond particles gross mass is 1.5-4%, the quality of granulating agent and carcass powder and
The ratio between gross mass of diamond particles is 0.1:99.9~0.3:99.7, the total time for controlling batch mixing is 1~2h;Granulating agent can be with
For granulating agent commonly used in the art, such as atoleine.
Cold-press moulding step:The mixed material for obtaining batch mixing step according to powder amount set in advance loads what is assembled
In compacting tool set cavity, steel mold is stripped after being suppressed through press, cold pressing green compact is made, the pressure of wherein press compacting is 250
~550MPa (such as 255MPa, 275MPa, 295MPa, 355MPa, 385MPa, 420MPa, 450MPa, 480MPa, 500MPa,
530MPa, 545MPa), the dwell time is 10~15s (such as 11s, 13s, 14s);
Free sintering step:The cold pressing green compact are placed in heating furnace, it is (i.e. outside not apply any pressure in normal pressure
Power) in vacuum or protective atmosphere (Ar, N2、H2Deng) under carry out pressureless sintering, be warming up to 850~950 DEG C (860 DEG C, 880 DEG C, 900
DEG C, 920 DEG C, 940 DEG C) predetermined temperature after be incubated a period of time, then natural cooling or Ar air quenchings it is cold take out, be made diamond
Saw blade cutter head, sintering time (i.e. heating-up time and soaking time sum) is 6~10h altogether.
During cold-press moulding, hypotony can make green compact consistency not enough, and hypertonia can then damage punching block, simultaneously
Performance after residual stress, influence sintering is left inside green compact, it is necessary to be adjusted according to powdered ingredients, is vital one
Individual factor;Simultaneously in free sintering process, due to having lacked impressed pressure as reacting driving force, temperature factor is particularly sensitive,
Programming rate, maximum sintering temperature, soaking time, cooling velocity etc. are likely to influence final cutter head performance.Through inventing the National People's Congress
Amount experiment show, programming rate be 100~200 DEG C/h (such as 110 DEG C/h, 130 DEG C/h, 150 DEG C/h, 160 DEG C/h, 180
DEG C/h, 190 DEG C/h), maximum sintering temperature be 850~950 DEG C, soaking time be 1~2h (such as 1.2h, 1.5h, 1.7h,
The sintering effect that condition 1.9h) is completed is best.
It is strong in hardness, consistency, bending resistance using the diamond segment obtained by carcass powder component of the present invention and preparation method
In terms of degree gold made from hot pressed sintering is used no less than same class (i.e. the material powder close with cost of material of the present invention)
Diamond tool bit, due to being prepared by the way of freely sintering, therefore can reach that batch is mass produced, substantially increase
Production efficiency, reduces production cost, at the same can efficiently, facilitate and realize the preparation of complicated shape cutter head.
The present invention is further illustrated below by specific embodiment.It should be noted that following embodiments are only to this hair
It is bright to be illustrated, and should not be construed as limitation of the scope of the invention.
Embodiment 1
In the present embodiment, carcass powder F-01 is into table 1 is grouped into, and carcass powder F-01 is Prealloyed carcass powder,
Prepared using water atomization commonly used in the art, the purity of each component is more than 99.5% in carcass powder, and its is basic
Performance such as table 2.
The composition and content of the F-01 powder of table 1, wt%
Powder code name | Cu | Ni | Sn | Co | Ti | Cr | P | Al | Fe |
F-01 | 20 | 2 | 2 | 3 | 1 | 1 | 2 | 1 | It is remaining |
The basic performance of the F-01 powder of table 2
The meso-position radius D50 of additional diamond particles is 40 μm, accounts for the 2% of diamond segment mass percent.
The preparation method of diamond circular saw blade cutter head, specific as follows in the present embodiment:
Batch mixing step:Make it uniform with diamond particles mixing 1h above-mentioned carcass powder, then add appropriate granulation
Agent atoleine, which continues mixing 45min, makes it uniform, wherein, the mass ratio of carcass powder and diamond particles is 98:2, granulation
The ratio between the quality and carcass powder of agent and the gross mass of diamond particles 0.3:99.7.
Cold-press moulding step:The mixed material for obtaining batch mixing step according to powder amount set in advance loads what is assembled
Pressing die intracavitary, steel mold is stripped after being suppressed through press, cold pressing green compact is made, the pressure of wherein press compacting is 450MPa,
Dwell time is 10s;
Free sintering step:The cold pressing green compact are placed in heating furnace, nothing is carried out under Ar protective atmospheres in normal pressure
Pressure sintering, 1.5h is incubated after being warming up to 900 DEG C of maximum sintering temperature with 150 DEG C/h heating rates, is then led to again into sintering furnace
Enter Ar gas and be rapidly cooled to room temperature, so that diamond circular saw blade cutter head is made.
The performance for the diamond circular saw blade cutter head that the present embodiment is obtained is determined after sintering, performance test methods are as follows:Density,
The test of consistency is referring to standard GB/T5163-2006 sintered metal materials-permeability sintered metal materials density, oil content
With the measure of percent opening;The test of hardness is referring to standard GB/T 230.1-2009 metal material Rockwell hardness test part 1s:
Test method;The test of bending strength is horizontal referring to standard GB/T 5319-2002 sintered metal materials (not including hard alloy)
The measure of fracture strength;The test of toughness (is not closed referring to standard GBT 5318-1985 sintered metal materials including hard
Gold) non-incision impact specimen, specific performance is as shown in table 3.
It is cutter head performance after the F-01 of table 3 is powder sintered
F-01 Prealloyed carcass powders in the present embodiment, using Fe elements as matrix, a small amount of Ni, Co reinforcing principal phase, plus
Enter a small amount of Sn in order to generate acceleration liquid phase in sintering, satisfaction freely sinters requirement.1wt% Ti and Cr is respectively with the addition of, with
Strengthen the wellability to diamond, and contain P, it is therefore an objective to generate Fe-P, Cu-P intermetallic compound, constitute eutectic structure, drop
Sintering temperature and low, while forming hard crisp phase, is conducive to accelerating the exposure of diamond.Sintering process is cold using Ar air quenchings, to strengthen
Cutter head hardness, lifts its sharpness, it is adaptable to the place of cutting efficiency.
Embodiment 2
In the present embodiment, carcass powder F-02 is into table 4 is grouped into, and carcass powder F-02 is Prealloyed carcass powder,
Prepared using water atomization commonly used in the art, the purity of each component is more than 99.5% in carcass powder, and its is basic
Performance such as table 5.
The composition and content of the F-02 powder of table 4, wt%
Powder code name | Cu | Ni | Sn | Co | Mn | Si | Fe |
F-02 | 30 | 8 | 3 | 5 | 2 | 1 | It is remaining |
The basic performance of the F-02 powder of table 5
The meso-position radius D50 of additional diamond particles is 35 μm, accounts for the 1.5% of diamond segment mass percent.
The preparation method of diamond circular saw blade cutter head, specific as follows in the present embodiment:
Batch mixing step:Make it uniform with diamond particles mixing 45min above-mentioned carcass powder, then add and make in right amount
Granula atoleine, which continues mixing 45min, makes it uniform, wherein, the mass ratio of carcass powder and diamond particles is 98.5:
1.5, the ratio between the quality and carcass powder of granulating agent and the gross mass of diamond particles 0.2:99.8.
Cold-press moulding step:The mixed material for obtaining batch mixing step according to powder amount set in advance loads what is assembled
Pressing die intracavitary, steel mold is stripped after being suppressed through press, cold pressing green compact is made, the pressure of wherein press compacting is 550MPa,
Dwell time is 10s;
Free sintering step:The cold pressing green compact are placed in heating furnace, no pressure is carried out under vacuum in normal pressure
Sintering, is incubated 1.5h when being warming up to 950 DEG C of sintering temperature with 150 DEG C/h heating rates, room temperature is then naturally cooled to again, takes out
After obtain diamond circular saw blade cutter head.
Performance containing diamond segment is as shown in table 6 after sintering, testing standard be the same as Example 1.
It is cutter head performance after the F-02 of table 6 is powder sintered
F-02 pre-alloyed powders in the present embodiment, are that a kind of content of Cu elements is higher, Ni, Co constituent content are moderate,
It is aided with the composition composition design of the elements such as Mn, Si.Simultaneously take from thinner diamond particles, extension sintering time, from
So measure such as cooling, it is therefore an objective to be improved the tissue obdurability of cutter head, wearability is substantially improved, and focuses on cutting life
Tool demands.
Embodiment 3
The carcass powder of the present embodiment is the Fe base pre-alloying powders without Co, and powdered ingredients composition is table 7, using this
The conventional water atomization in field is prepared, and the purity of each component is more than 99.5% in carcass powder, the basic nature of powder
Can be such as table 8.
The composition and content of the F-03 powder of table 7, wt%
Powder code name | Cu | Ni | Sn | Fe |
F-03 | 25 | 5 | 3 | It is remaining |
The basic performance of the F-03 powder of table 8
The meso-position radius D50 of additional diamond particles is 35 μm, accounts for the 1.5% of diamond segment mass percent.
The preparation method of diamond circular saw blade cutter head, specific as follows in the present embodiment:
Batch mixing step:Make it uniform with diamond particles mixing 0.5h above-mentioned carcass powder, then add and make in right amount
Granula, which continues mixing 0.5h, makes it uniform, wherein, the mass ratio of carcass powder and diamond particles is 98.5:1.5, granulating agent
The ratio between quality and the gross mass of carcass powder and diamond particles 0.15:99.85.
Cold-press moulding step:The mixed material for obtaining batch mixing step according to powder amount set in advance loads what is assembled
Pressing die intracavitary, steel mold is stripped after being suppressed through press, cold pressing green compact is made, the pressure of wherein press compacting is 500MPa,
Dwell time is 15s;
Free sintering step:By it is described cold pressing green compact be placed in heating furnace, in normal pressure protective atmosphere be N2The bar of gas
Pressureless sintering is carried out under part, 1h is incubated after being warming up to 850 DEG C of sintering temperature with 150 DEG C of heating rates, then again in protective atmosphere
Under naturally cool to room temperature, taking-up after obtain diamond circular saw blade cutter head.
Performance containing diamond segment is as shown in table 9 after sintering, testing standard be the same as Example 1.
It is cutter head performance after the F-03 of table 9 is powder sintered
The F-03 pre-alloyed powders of the present embodiment 3, its outstanding feature is free from Co elements, and matrix phase is Fe phases, and secondary phase is
Cu phases, with Ni solution strengthening principal phase and time phase, Sn addition, as above-mentioned, on the one hand can accelerate liquid phase to generate, and satisfaction is freely burnt
The requirement of knot, Cu-Sn, Fe-Sn compound of hard crisp phase on the other hand can be generated with Fe, Cu, reaches that instrument is wanted to sharpness
Ask.The present embodiment has taken into account the cost and sharpness of cutter head.
Embodiment 4
In the present embodiment 4, carcass powder is into table 10 is grouped into, and it is Prealloyed carcass powder, using commonly used in the art
Water atomization prepare, the purity of each component is more than 99.5% in carcass powder, the basic performance such as table of the powder
11。
The composition of the F-04 powder of table 10, wt%
Powder code name | Cu | Co | Sn | Fe |
F-04 | 25 | 10 | 3 | It is remaining |
The basic performance of the F-04 powder of table 11
The meso-position radius D50 of additional diamond particles is 45 μm, accounts for the 2.5% of diamond segment mass percent.
The preparation method of diamond circular saw blade cutter head, specific as follows in the present embodiment:
Batch mixing step:Make it uniform with diamond particles mixing 0.5h above-mentioned carcass powder, then add and make in right amount
Granula, which continues mixing 0.5h, makes it uniform, wherein, the mass ratio of carcass powder and diamond particles is 97.5:2.5, granulating agent
The ratio between quality and the gross mass of carcass powder and diamond particles 0.1:99.9.
Cold-press moulding step:The mixed material for obtaining batch mixing step according to powder amount set in advance loads what is assembled
Pressing die intracavitary, steel mold is stripped after being suppressed through press, cold pressing green compact is made, the pressure of wherein press compacting is 500MPa,
Dwell time is 10s;
Free sintering step:By it is described cold pressing green compact be placed in heating furnace, in normal pressure protective atmosphere be N2The bar of gas
Pressureless sintering is carried out under part, 1h is incubated when being warming up to 950 DEG C of sintering temperature with 200 DEG C/h heating rates, sintering completes backward burn
Ar gas is passed through in freezing of a furnace to cool rapidly, it is to be cooled to taking-up after room temperature, obtain diamond circular saw blade cutter head.
Performance containing diamond segment is as shown in table 12 after sintering, testing standard be the same as Example 1.
It is cutter head performance after the F-04 of table 12 is powder sintered
F-04 pre-alloyed powders in the present embodiment 4, matrix phase is Fe phases, and secondary phase is Cu phases, with 10wt% Co solid solutions
Strengthen principal phase.The addition of more content Co elements, makes the wearability of cutter head and the holding of diamond is substantially improved, sinterable
Property is also improved to some extent with formability, it is adaptable to the most of application scenarios insensitive to price.
Claims (11)
1. a kind of diamond circular saw blade cutter head, it is characterised in that the cutter head is by diamond particles and for consolidating the diamond
The carcass powder of particle is formed, wherein the carcass powder is composed of the following components by mass percentage:Cu 15%~30%,
Ni 0%~10%, Sn 2%~8%, Co 0%~10%, 0% < Me≤5%, remaining is Fe and inevitably miscellaneous
Matter, Me is selected from least one of Mn, Ti, Si, Cr, P, Al;
The preparation method of the diamond circular saw blade cutter head comprises the following steps:
Batch mixing step:The carcass powder is well mixed with diamond particles, granulating agent is then added and continues well mixed;
Cold-press moulding step:The mixed material for obtaining the batch mixing step according to powder amount set in advance loads what is assembled
Pressing die intracavitary, mould is stripped after being suppressed through press, and cold pressing green compact are made;
Free sintering step:The cold pressing green compact are placed in heating furnace cool down after free sintering and taken out, are made described
Diamond circular saw blade cutter head finished product;
In the free sintering step, the maximum temperature freely sintered be 850~950 DEG C, sintering atmosphere be vacuum or
Protective atmosphere, sintering total time is 6-10h;The speed for being warming up to the maximum temperature is 100-200 DEG C/h, in maximum temperature bar
Soaking time is 1.2-2h under part.
2. diamond circular saw blade cutter head according to claim 1, it is characterised in that Fe quality hundred in the carcass powder
Divide than being 40-80%.
3. diamond circular saw blade cutter head according to claim 2, it is characterised in that Fe quality hundred in the carcass powder
Divide than being 50%~70%.
4. diamond circular saw blade cutter head according to claim 1, it is characterised in that in the carcass powder, Cu matter
It is 20%~30% to measure percentage;Ni mass percent is 2%~8%;Sn mass percent is 2%~5%;Co matter
It is 0%~5% to measure percentage.
5. diamond circular saw blade cutter head according to claim 1, it is characterised in that the meso-position radius of the carcass powder particle
D50 is 15~40 μm, wherein the meso-position radius D50 is determined by laser granulometer.
6. diamond circular saw blade cutter head according to claim 1, it is characterised in that the meso-position radius of the diamond particles
D50 is 30~45 μm.
7. diamond circular saw blade cutter head according to claim 6, it is characterised in that the diamond particles account for the Buddha's warrior attendant
The mass percent of stone saw blade cutter head is 1.5%~4%.
8. diamond circular saw blade cutter head according to claim 1, it is characterised in that in the batch mixing step, required mixed
The total time of material is 1-2h.
9. diamond circular saw blade cutter head according to claim 8, it is characterised in that the carcass powder is pre alloy
Powder.
10. diamond circular saw blade cutter head according to claim 1, it is characterised in that in the cold-press moulding step, institute
The pressure for stating press compacting is 250~550MPa, and the dwell time is 10~15s.
11. diamond circular saw blade cutter head according to claim 1, it is characterised in that in the free sintering step, institute
State cooling and refer to that natural cooling or Ar air quenchings are cold.
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