CN101255512A - Boron-containing titanium carbide nitride based metal ceramic cutter material and preparation technique thereof - Google Patents
Boron-containing titanium carbide nitride based metal ceramic cutter material and preparation technique thereof Download PDFInfo
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- CN101255512A CN101255512A CNA2008100310106A CN200810031010A CN101255512A CN 101255512 A CN101255512 A CN 101255512A CN A2008100310106 A CNA2008100310106 A CN A2008100310106A CN 200810031010 A CN200810031010 A CN 200810031010A CN 101255512 A CN101255512 A CN 101255512A
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Abstract
The invention discloses a boracic titanium carbonitride based cermet tool bit material and the preparing method thereof. The tool bit material is based on carbonitride as the parent metal, characterized in the tool bit is composed of 0.005% to 0.25% by mass of boron, 6% to 11% by mass of C, 2% to 7% by mass of N, 35% to 70% by mass of Ti, 5% to 20% by mass of W, 0 to 12% by mass of Mo, 0 to 9% by mass of Ta, 1% to 7% by mass of Nb and 6% to 25% by mass of Co and Ni, wherein boron is prepared by adding one or more selected from single substance boron, titanium diboride, molybdenum boride, boron carbide and boric oxide which are in raw material power form. The tool bit material is prepared mainly by mixing the raw material, ball-milling dispersing, press forming, pre-sintering and high-temperature sintering, its high-temperature hardness, high-temperature strength, red hardness and inoxidability are obviously improved, the cutting speed is greatly increased, and the service life is notably entended.
Description
Technical field
The invention belongs to material science, relate in particular to a kind of titanium carbonitride (Ti (CN)) based metal ceramic cutter material of boracic and the powder metallurgy technology that is used to prepare this cutter material.
Background technology
Owing to have higher chemical stability between Ti (CN) base ceramet tool bit and the machined material, therefore in the Tool in Cutting process, can not produce bigger friction, it is too high that the temperature of Tool in Cutting sword also is unlikely to, thereby effectively stoped the mutual diffusion mutually of atom between Ti (CN) base ceramet tool bit and machined material, significantly improved the anti stick polishing machine of Ti (CN) base ceramet tool bit, therefore Ti (CN) based ceramic metal also becomes a kind of comparatively ideal cutter material in steel precision work and the semi-finishing, has filled up WC base cemented carbide and Al
2O
3, Si
3N
4The neutral gear of pottery in high speed precision work and semi-finishing field.But, under the high speed cutting condition, particularly when some more unmanageable workpiece of processing, because the cutting temperature height, work hardening is serious, and cutting force is very big, common Ti (CN) based metal ceramic cutter material seems and is difficult to deal with, the durability of cutter and work-ing life are not very desirable, therefore how to improve Ti (CN) based metal ceramic cutter material than the hot strength under the bad working environments, hardness and red hardness and wear resistance, just seem extremely important and urgent.
Summary of the invention
The technical problem to be solved in the present invention is to overcome the deficiencies in the prior art, provide a kind of hot hardness, hot strength, red hardness, oxidation-resistance be improved significantly, and the Ti of the boracic that cutting speed and work-ing life are improved significantly (CN) based metal ceramic cutter material also provides a kind of preparation technology of Ti (CN) based metal ceramic cutter material of boracic.
For solving the problems of the technologies described above, the technical scheme that the present invention proposes is a kind of Ti (CN) based metal ceramic cutter material of boracic, with Ti (CN) as base material, with cobalt and/or nickel as the bonding phase, it is characterized in that containing in the described cutter material massfraction and be 0.005～0.25% boron, the massfraction of other each dvielement is respectively:
Carbon 6～11%
Nitrogen 2～7%
Titanium 35～70%
Tungsten 5～20%
Molybdenum 0～12%
Tantalum 0～9%
Niobium 1～7%
Cobalt 0～20%
Nickel 0～20%
And the massfraction of the total content of above-mentioned cobalt and nickel in cutter is 6～25%.
The Ti of above-mentioned boracic (CN) elemental tungsten, molybdenum, tantalum, niobium that based metal ceramic cutter material contained are to make raw material by the carbide powder of each element or nitride powder to obtain after the powder metallurgical technique preparation, element titanium is to make raw material by two or three in titanium carbide powder, titanium nitride powder, the carbon titanium carbonitride powder to obtain after powder metallurgical technique preparation, and element boron is to make raw material by in pure boron powder, titanium diboride powder, molybdenum boride powder, boron carbide powder, the boron oxide powder one or more to obtain after the powder metallurgical technique preparation.。
The purity of above-mentioned various raw material powders is greater than 99%, and mean particle size is less than 1.5 microns.
When the element boron in the above-mentioned cutter material is to make raw material under the situation that powder metallurgical technique prepares by the pure boron powder, the addition of pure boron is 0.005～0.1% of the raw materials quality total mass of each powder mass of raw material (promptly as).
When the element boron in the above-mentioned cutter material is to be made raw material by titanium diboride powder under the situation that powder metallurgical technique prepares, the addition of TiB2 is 0.02～0.5% of a raw materials quality.
When the element boron in the above-mentioned cutter material is to make raw material under the situation that powder metallurgical technique prepares by the molybdenum boride powder, the addition of molybdenum boride is 0.1～2.5% of a raw materials quality.
When the element boron in the above-mentioned cutter material is to be made raw material by boron carbide powder under the situation that powder metallurgical technique prepares, the addition of norbide is 0.01～0.2% of a raw materials quality.
When the element boron in the above-mentioned cutter material is that boron carbide powder and boron oxide powder are made raw material under the situation that powder metallurgical technique prepares, the addition of norbide and boron oxide is 0.005～0.2% of a raw materials quality.
The present invention also provides a kind of preparation technology of titanium carbide nitride based metal ceramic cutter of above-mentioned boracic, comprises following processing step successively: be mixed in proportion the drying of each raw material powder, Ball milling raw material powder, ball milling slurry, accurate compacting, pre-burning and high temperature sintering (cutter material behind the sintering can be used for milling cutter);
In the described Ball milling process, as grinding medium, as grinding element, add the binding agent of raw material powder quality 4～4.5% with Wimet with dehydrated alcohol or methyl alcohol, ratio of grinding media to material is 1: 6～10, and the time of Ball milling is 20～100 hours; The drying of described ball milling slurry is to adopt the spraying drying mode or adopt the vacuum-drying mode, and the exsiccant temperature is 80～95 ℃; In the described accurate pressing process, the relative density of accurate compacting pressed compact is greater than 50%; The temperature of described pre-burning process is 200～500 ℃, and the pre-burning time is 2～4 hours; Described high temperature sintering can be vacuum sintering, many atmosphere (N
2, H
2And/or Ar) sintering or high temperature pressure sintering, the sintering temperature of vacuum sintering or many atmosphere sinterings is 1420～1520 ℃, soaking time is 50～90 minutes; Described high temperature pressure agglomerating sintering temperature is 1420～1470 ℃, and soaking time is 50～70 minutes.
Compared with prior art, the invention has the advantages that: by in raw material powder, adding a certain amount of boron, make that the bonding phase and the crystal boundary of Ti (CN) based metal ceramic cutter material are strengthened, improved thermal conductivity, hot strength and the hardness of ceramic tool material, the Ti of this boracic (CN) based metal ceramic cutter material demonstrates good red hardness and excellent impact resistance in the processing practice.The preparation technology of this cutter material is also simple relatively, operation easily, Ti (CN) base ceramet tool bit by its boracic for preparing is compared with common Ti (CN) base ceramet tool bit, performance index such as the hot hardness of cutter, hot strength, red hardness, oxidation-resistance obviously improve, cutting speed improves 20～40%, and the life-span of cutter improves 30～50%.And the exploitation of high performance Ti (CN) base ceramet tool bit provides higher platform for the raising of follow-up workpiece to be machined surface quality and the improvement of mechanical workout benefit again.
Embodiment
Embodiment 1:
Massfraction is respectively 0.005% pure boron, 5.5% WC, 3% TaC, 9% NbC, 10% Mo
2C, 50% Ti (CN), 10% TiC, 6% Co, 6% Ni and 0.495% C mix, various raw materials are a micron powder, the mixing raw material powder is put into ball mill, with dehydrated alcohol as grinding medium, with Wimet as grinding element, the polyoxyethylene glycol (PEG) and 1.5% Polyvinylpyrolidone (PVP) (PVP) that add mixing raw material powder gross weight 3%, ratio of grinding media to material is 1: 8, the Ball milling time is 55 hours, slurry after the Ball milling is carried out spraying drying, and nozzle outlet temperature is 90 ℃; Carry out precise press molding again, the pressed compact relative density is 53%; Carry out pre-burning again, calcined temperature is 200～500 ℃, and the time is 3 hours; Under 1480 ℃ of temperature, carry out vacuum sintering, be incubated 70 minutes, after waiting to lower the temperature the sintering metal product that obtains is ground into the cutter of corresponding specification.
Cutting experiment shows: Ti (CN) base ceramet tool bit of the boracic by above-mentioned explained hereafter is suitable for the precision turning of various steel, compare with common micron-sized Ti (CN) based ceramic metal, cutting speed has improved 30～40%, and the life-span of cutter improves 30～40%.
Embodiment 2:
Massfraction is respectively 0.3% TiB2,16.2% WC, 6% TaC, 6% NbC, 5% Mo
2C, 48% Ti (CN), 3% TiC, 8% Co, 7% Ni and 0.5% C mix, various raw materials are a micron powder, the mixing raw material powder is put into ball mill, with dehydrated alcohol as grinding medium, with Wimet as grinding element, the polyoxyethylene glycol (PEG) and 1.5% Polyvinylpyrolidone (PVP) (PVP) that add mixing raw material powder gross weight 3%, ratio of grinding media to material is 1: 8, the Ball milling time is 48 hours, slurry after the Ball milling is spray-dried, 90 ℃ of nozzle outlet temperatures; Carry out precise press molding again, pressed compact relative density 54%; Carry out pre-burning again, the temperature of pre-burning is 200～500 ℃, and the time is 3 hours; H at 1480 ℃
2With sintering under the Ar atmosphere, be incubated 70 minutes, after waiting to lower the temperature the sintering metal product that obtains is ground into the cutter of corresponding specification.
Cutting experiment shows: Ti (CN) base ceramet tool bit of the boracic by above-mentioned explained hereafter is suitable for the semi-finishing of various steel product turnings, compare with common micron-sized Ti (CN) based ceramic metal, cutting speed has improved 20～30%, and the life-span of cutter improves 30～40%.
Embodiment 3:
Massfraction is respectively 2.3% molybdenum boride, 15%WC, 2%NbC, 61.7%Ti (CN), 3.8%TiC, 7%Co, 8%Ni and 0.2%C to be mixed, various raw materials are a micron powder, the mixing raw material powder is put into ball mill, with dehydrated alcohol as grinding medium, with Wimet as grinding element, add the polyoxyethylene glycol (PEG) of mixing raw material powder gross weight 3% and 1.5% Polyvinylpyrolidone (PVP) (PVP), ratio of grinding media to material is 1: 9, the Ball milling time is 50 hours, slurry after the Ball milling is spray-dried, 90 ℃ of nozzle outlet temperatures; Carry out precise press molding again, pressed compact relative density 53%; Carry out pre-burning again, the temperature of pre-burning is 200～500 ℃, and the pre-burning time is 3 hours; H at 1480 ℃
2With sintering under the Ar atmosphere, be incubated 70 minutes, after waiting to lower the temperature the sintering metal product that obtains is ground into the cutter of corresponding specification.
Cutting experiment shows: Ti (CN) base ceramet tool bit of the boracic by above-mentioned explained hereafter is suitable for the half finish turning processing of various steel, compare with common micron-sized Ti (CN) based ceramic metal, cutting speed has improved 30～40%, and the life-span of cutter improves 40～50%.
Embodiment 4:
Massfraction is respectively 0.1% norbide, 10% WC, 6% TaC, 3% NbC, 10.5% Mo
2C, 46% Ti (CN), 8% TiC, 8% Co, 8% Ni and 0.4% C mix, various raw materials are a micron powder, the mixing raw material powder is put into ball mill, with dehydrated alcohol as grinding medium, with Wimet as grinding element, the polyoxyethylene glycol (PEG) and 1.5% Polyvinylpyrolidone (PVP) (PVP) that add mixing raw material powder gross weight 3%, ratio of grinding media to material is 1: 9, the Ball milling time is 45 hours, slurry after the Ball milling is spray-dried, 90 ℃ of nozzle outlet temperatures; Carry out precise press molding again, pressed compact relative density 54%; Carry out pre-burning again, the temperature of pre-burning is 200～500 ℃, and the pre-burning time is 3 hours; Sintering under the pressure of 1440 ℃, 70 standard atmospheric pressures is incubated 60 minutes, after waiting to lower the temperature the sintering metal product that obtains is ground into the cutter of corresponding specification.
Cutting experiment shows: Ti (CN) base ceramet tool bit of the boracic by above-mentioned explained hereafter is suitable for the milling precision work of various steel, compare with common micron-sized Ti (CN) based ceramic metal, cutting speed has improved 20～30%, and the life-span of cutter improves 30～50%.
Embodiment 5:
Massfraction is respectively 0.05% norbide, 0.1% boron oxide, 5.5%WC, 4%TaC, 2%NbC, 10%Mo
2C, 58%Ti (CN), 10%Co, 10%Ni and 0.35%C mix, various raw materials are a micron powder, the mixing raw material powder is put into ball mill, as grinding medium, as grinding element, add the polyoxyethylene glycol (PEG) of mixing raw material powder gross weight 3% and 1.5% Polyvinylpyrolidone (PVP) (PVP) with dehydrated alcohol with Wimet, ratio of grinding media to material is 1: 10, the Ball milling time is 42 hours, and the slurry after the Ball milling is spray-dried, 90 ℃ of nozzle outlet temperatures; Carry out precise press molding again, pressed compact relative density 53%; Carry out pre-burning again, the temperature of pre-burning is 200～500 ℃, and the pre-burning time is 3 hours; Sintering under 1440 ℃, 70 standard atmosphere pressure pressures is incubated 60 minutes, after waiting to lower the temperature the sintering metal product that obtains is ground into the cutter of corresponding specification.
Cutting experiment shows: Ti (CN) base ceramet tool bit of the boracic by above-mentioned explained hereafter is suitable for the precision work or the semi-finishing of unmanageable steel alloy, hardened steel die steel, compare with common micron-sized Ti (CN) based ceramic metal, cutting speed has improved 30～40%, and the life-span of cutter improves 30～40%.
Claims (9)
1, a kind of titanium carbide nitride based metal ceramic cutter material of boracic, with titanium carbonitride as base material, as the bonding phase, it is characterized in that containing in the described cutter material massfraction and be 0.005～0.25% boron with cobalt and/or nickel, the massfraction of other each element is respectively:
Carbon 6～11%
Nitrogen 2～7%
Titanium 35～70%
Tungsten 5～20%
Molybdenum 0～12%
Tantalum 0～9%
Niobium 1～7%
Cobalt 0～20%
Nickel 0～20%
And the massfraction of the total content of above-mentioned cobalt and nickel in cutter material is 6～25%.
2, the titanium carbide nitride based metal ceramic cutter material of boracic according to claim 1, it is characterized in that the elemental tungsten that described cutter material contains, molybdenum, tantalum, niobium is to make raw material by the carbide powder of each element or nitride powder to obtain after the powder metallurgical technique preparation, element titanium is by titanium carbide powder, titanium nitride powder, in the carbon titanium carbonitride powder two or three does that raw material obtains after powder metallurgical technique preparation, element boron is by the pure boron powder, titanium diboride powder, the molybdenum boride powder, boron carbide powder, in the boron oxide powder one or more do that raw material obtains after powder metallurgical technique preparation.
3, the titanium carbide nitride based metal ceramic cutter material of boracic according to claim 2, the purity that it is characterized in that described each raw material powder are greater than 99%, and mean particle size is less than 1.5 microns.
4, according to the titanium carbide nitride based metal ceramic cutter material of claim 2 or 3 described boracics, it is characterized in that working as element boron is to make raw material under the situation that powder metallurgical technique prepares by the pure boron powder, the addition of pure boron is 0.005～0.1% of a raw materials quality.
5, according to the titanium carbide nitride based metal ceramic cutter material of claim 2 or 3 described boracics, it is characterized in that working as element boron is to make raw material under the situation that powder metallurgical technique prepares by titanium diboride powder, the addition of TiB2 is 0.02～0.5% of a raw materials quality.
6, according to the titanium carbide nitride based metal ceramic cutter material of claim 2 or 3 described boracics, it is characterized in that working as element boron is to make raw material under the situation that powder metallurgical technique prepares by the molybdenum boride powder, the addition of molybdenum boride is 0.1～2.5% of a raw materials quality.
7, according to the titanium carbide nitride based metal ceramic cutter material of claim 2 or 3 described boracics, it is characterized in that working as element boron is to make raw material under the situation that powder metallurgical technique prepares by boron carbide powder, the addition of norbide is 0.01～0.2% of a raw materials quality.
8, according to the titanium carbide nitride based metal ceramic cutter material of claim 2 or 3 described boracics, it is characterized in that working as element boron is that boron carbide powder and boron oxide powder are made raw material under the situation that powder metallurgical technique prepares, the addition of norbide and boron oxide is 0.005～0.2% of a raw materials quality.
9, the preparation technology of the titanium carbide nitride based metal ceramic cutter material of each described boracic in a kind of claim 1～8 comprises following processing step: be mixed in proportion the drying of each raw material powder, Ball milling raw material powder, ball milling slurry, accurate compacting, pre-burning and high temperature sintering successively;
In the described Ball milling process, as grinding medium, as grinding element, add the binding agent of raw material powder quality 4～4.5% with Wimet with dehydrated alcohol or methyl alcohol, ratio of grinding media to material is 1: 6～10, and the time of Ball milling is 20～100 hours; The drying of described ball milling slurry is to adopt the spraying drying mode or adopt the vacuum-drying mode, and the exsiccant temperature is 80～95 ℃; In the described accurate pressing process, the relative density of accurate compacting pressed compact is greater than 50%; The temperature of described pre-burning process is 200～500 ℃, and the pre-burning time is 2～4 hours; Described high temperature sintering is vacuum sintering, many atmosphere sinterings or high temperature pressure sintering, and the sintering temperature of vacuum sintering or many atmosphere sinterings is 1420～1520 ℃, and soaking time is 50～90 minutes; Described high temperature pressure agglomerating sintering temperature is 1420～1470 ℃, and soaking time is 50～70 minutes.
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