CN101509375A - Inlaid diamond-cemented carbide strong wear resistant pick and producing technique thereof - Google Patents
Inlaid diamond-cemented carbide strong wear resistant pick and producing technique thereof Download PDFInfo
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- CN101509375A CN101509375A CNA2009100429336A CN200910042933A CN101509375A CN 101509375 A CN101509375 A CN 101509375A CN A2009100429336 A CNA2009100429336 A CN A2009100429336A CN 200910042933 A CN200910042933 A CN 200910042933A CN 101509375 A CN101509375 A CN 101509375A
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Abstract
The invention discloses a diamond-impregnated-cemented carbide strong wear-resistant cutting pick and a manufacturing process thereof. The cutting pick consists of a steel body tooth body (3), a tooth head (2) and a cemented carbide tooth top (1); wherein, the steel body tooth body (3), the tooth head (2) and the cemented carbide tooth top (1) are sintered into a whole by the method of powder metallurgy and thermocompression; the raw material of the tooth head (2) comprises matrix powder and diamond; the matrix powder contains cobalt powder, nickel powder, ferrous powder, copper powder, manganese powder, tin powder, chromium powder and tungsten-carbide powder in certain proportions; the granularity of the diamond is 0.42-0.074mm and the volume of the diamond is 5%-50% of the volume of the tooth head; the manufacturing process comprises matrix powder mixing, working lining materials mixing, hot-pressed sintering molding and sand blasting. The cutting pick of the invention has high working efficiency, long service life and simple and fast manufacturing process and is applicable to equipment of coal cutting, mining and well boring, etc.
Description
Technical field
The present invention relates to the pick that a kind of coal mining, mining, drilling equipment are used, relate in particular to a kind of impregnated with diamond-carbide alloy strong wear resistance pick, the invention still further relates to the manufacture craft of this impregnated with diamond-carbide alloy strong wear resistance pick.
Background technology
Conventional pick is the carbide alloy crown of burn-oning in tooth head position, and pick steel body tooth body is made by special steel (as 30CrMnTi, 30CrMnSi etc.).Because the material hardness of pick steel body tooth body is significantly less than the hard-metal insert head, be easy to wearing and tearing, so often occur that the hard-metal insert head process goes out, comes off, sealing-off and in working angles with phenomenons such as steel body tooth body fractures, cause pick lower application life.
Summary of the invention
First technical problem to be solved by this invention provides the impregnated with diamond-carbide alloy strong wear resistance pick of a kind of high efficiency and long service life.
Second technical problem to be solved by this invention provides the manufacture craft of the simple and fast of this impregnated with diamond-carbide alloy strong wear resistance pick.
In order to solve above-mentioned first technical problem, impregnated with diamond provided by the invention-carbide alloy strong wear resistance pick, comprise steel body tooth body, tooth head and carbide alloy crown, described steel body tooth body and described tooth head and carbide alloy crown directly by powder metallurgy method, utilize heat pressing process to be sintered into one; The raw material of described tooth head comprises carcass powder and super hard abrasive; Described carcass powder contains cobalt powder, nickel powder, iron powder, copper powder, manganese powder, glass putty, chromium powder and tungsten-carbide powder, described carcass powder particle diameter is not more than 0.074mm, wherein, the gross weight of cobalt powder, nickel powder, iron powder, manganese powder and five kinds of metal powders of chromium powder accounts for 10%～60% of carcass powder gross weight, the gross weight of copper powder and glass putty accounts for 10%～40% of carcass powder gross weight, and tungsten-carbide powder weight accounts for 20%～80% of carcass powder gross weight; Described super hard abrasive adopts diamond, and the diamond particles degree is 0.42mm～0.074mm, and the ratio that adamantine volume accounts for described tooth head volume is 5%～50%.
Further, adopt the pre-alloyed powder of cobalt, nickel, iron, manganese and chromium to replace all or part of described cobalt powder, nickel powder, iron powder, manganese powder and five kinds of metal powders of chromium powder; Adopt the pre-alloyed powder of copper and tin to replace all or part of copper powder and glass putty; Adopt the ditungsten carbide powder to replace all or part of tungsten-carbide powder.
The manufacture craft of impregnated with diamond provided by the invention-carbide alloy strong wear resistance pick, carry out successively according to the following steps:
A, carcass powder batch mixing
Get the carcass powder raw material by prescription, adopt ball mill mixing machine batch mixing then, dry sealing is preserved to the carcass powder after mixed;
B, working layer materials compounding
Get super hard abrasive and the mixed carcass powder of a step by prescription, take by weighing wetting agent by 1%～2% of carcass powder quality total amount, wetting agent adopts a kind of or two or more mixtures in glycerine, paraffin, machine oil and the alcohol, and super hard abrasive, carcass powder and wetting agent are mixed;
C, Thermocompressed sintering and forming
Earlier mould, steel body tooth body 3 and carbide alloy crown 1 are assembled, then will be through pack into mould and send into the forcing press precompressed of the compound of the super hard abrasive of b step and carcass powder, the hot pressing of then switching on, carry out heat-insulation pressure keeping at last, pressure is 2～5MPa when wherein switching on hot pressing, sintering temperature is 900～1100 ℃, and heat-insulation pressure keeping and sintering time are 5～10 minutes;
D, sandblast
On sand-blasting machine, hot-forming tooth head is carried out sandblast.
In a step, the carcass powder raw material that will meet prescription earlier stirs in vessel by hand, is using ball mill mixing machine batch mixing then; During with ball mill mixing machine batch mixing, cumulative volume according to carcass powder raw material and batch mixing ball is that 50%～70% of spherical tank volume is selected ball mill, according to carcass powder raw material quality and batch mixing ball mass ratio is that the ratio of 1:1～1.5 takes by weighing the batch mixing ball, the batch mixing ball adopts sintered carbide ball, and choose the sphere diameter mix and match that varies in size and use, the batch mixer rotating speed is chosen as per minute 30～100 changes mixing time 1～4 hour; Shut down at last, mixed carcass powder and ball are sieved separately.
In step b, adopt batch mixer that super hard abrasive, carcass powder and wetting agent are mixed, specifically may further comprise the steps:
The first step: pour load weighted carcass powder into the batch mixer barrel, shakeout, in the middle of material, extrude a pit;
Second step: super hard abrasive is poured in the pit, again wetting agent is poured in the super hard abrasive, make super hard abrasive all moistening;
The 3rd step: manual stir superhard material and carcass powder repeatedly, pour out sieve after, refund again in the batch mixer barrel;
The 4th step: put into length in the batch mixer barrel and be 3～4 of steel chains about 200mm, build batch mixer barrel lid, the start batch mixing, mixing time is 30～60 minutes, Revolution Per Minute 40～100 commentaries on classics of batch mixer;
The 5th step: shut down and detect, the range estimation powder has or not color spot, conglomeration, and whether batch mixing is even.
The invention has the beneficial effects as follows:
Adopt the impregnated with diamond-carbide alloy strong wear resistance pick of technique scheme, because the tooth centriciput has added the carbide alloy crown, improved the abrasion resistance of pick, operating efficiency and application life, the tooth head, steel body tooth body and carbide alloy crown pass through powder metallurgy method, utilize heat pressing process to be sintered to one, replaced the conventional manufacture method that carbide alloy directly is welded on steel body tooth body, avoided fracture the generation with obscission of tooth head and steel body tooth body, can realize increasing substantially the operating efficiency of pick and the impregnated with diamond carbide alloy strong wear resistance pick that increases the service life, its manufacture craft simple and fast.
In sum, the present invention is the impregnated with diamond-carbide alloy strong wear resistance pick of a kind of high efficiency and long service life, its manufacture craft simple and fast.
Description of drawings
Fig. 1 is a structural representation of the present invention.
The specific embodiment
Below in conjunction with drawings and Examples the present invention is further described.
As shown in Figure 1, steel body tooth body 3, tooth head 2 and carbide alloy crown 1 adopt heat pressing process to be sintered into one directly by powder metallurgy method; Tooth head 2 has also added super hard abrasive diamond composition except containing common carcass metal and non-metal powder, that is to say that the raw material of tooth head 2 comprises carcass powder and super hard abrasive, and super hard abrasive adopts diamond; Carcass powder contains cobalt powder, nickel powder, iron powder, copper powder, manganese powder, glass putty, chromium powder and tungsten-carbide powder, the carcass powder particle diameter is not more than 0.074mm, wherein, the gross weight of cobalt powder, nickel powder, iron powder, manganese powder and five kinds of metal powders of chromium powder accounts for 10%～60% of carcass powder gross weight, the gross weight of copper powder and glass putty accounts for 10%～40% of carcass powder gross weight, and tungsten-carbide powder weight accounts for 20%～80% of carcass powder gross weight; , the diamond particles degree is 0.42mm～0.074mm, adamantine volume accounts for the proportional control of tooth head 2 volumes between 5%～50%.
Clearly, can also adopt the pre-alloyed powder of cobalt, nickel, iron, manganese and chromium to replace all or part of cobalt powder, nickel powder, iron powder, manganese powder and five kinds of metal powders of chromium powder; Adopt the pre-alloyed powder of copper and tin to replace all or part of copper powder and glass putty; Adopt the ditungsten carbide powder to replace all or part of tungsten-carbide powder.
The making step of impregnated with diamond carbide alloy strong wear resistance pick is as follows during concrete enforcement:
1., determine carcass composition and super hard abrasive prescription
Carcass contains cobalt powder, nickel powder, iron powder, copper powder, manganese powder, glass putty, chromium powder, tungsten carbide and ditungsten carbide, wherein, cobalt powder, nickel powder, iron powder, manganese powder, chromium powder or their pre-alloyed powder quality account for 10%～60%, copper powder, glass putty or their pre-alloyed powder quality account for 10%～40%, tungsten carbide, ditungsten carbide powder quality account for 20%～80%, and used carcass powder particle diameter is below the 0.074mm; Super hard abrasive is a diamond, and adamantine volume accounts for the proportional control of tooth head 2 volumes between 5%～50%, and granularity is 0.42mm～0.074mm.
2., carcass powder batch mixing
Go out the consumption of every kind of composition in the carcass powder according to recipe calculation, with pharmacist balance or the accurate weighing of table scale, put into vessel ware separately, check confirm errorless after, be poured on together and mix, load weighted batch mixing is packed into again and carry out mechanical mixture in the mixing equipment, mixing equipment is the ball mill mixing machine, and the sealing of packing into immediately in the dry vessel of the carcass powder after mixed is preserved.
Its ball mill mixing technology is:
The first step: the carcass powder of accurate weighing is stirred in the vessel ware earlier by hand;
Second step: according to the batch mixing total amount, the cumulative volume of foundation material and ball is that 50%～70% of spherical tank volume is selected suitable ball mill;
The 3rd step: heavy according to material, take by weighing sintered carbide ball, by ball material mass ratio (1～1.5): 1 takes by weighing, and evenly mixed for making material, sphere diameter adopts large, medium and small collocation;
The 4th step: by technological requirement, choose the rotating speed of batch mixer, determined the time, the start batch mixing, general rotating speed is chosen as 30～100rpm, mixing time 1～4h;
The 5th step: shut down, will expect to separate with scalping with ball, will expect accurate weighing, whether loss estimation is also checked identical with the amount of the first step.
3., the compounding technology of working layer materials
The working lining of tooth head 2 is to contain the super hard abrasive diamond in the carcass powder among the present invention.Take by weighing super hard abrasive diamond and carcass powder by the prescription requirement, take by weighing wetting agent by 1%～2% of carcass powder quality total amount, wetting agent glycerine, paraffin, machine oil, alcohol or their mixture, its effect is to make between super hard abrasive and the carcass powder to mix, and does not produce segregation and flotation because of between the two density is different.
Mixing the system step is:
The first step: pour load weighted carcass powder into barrel, take off flat back and in the middle of material, extrude a pit with the steel spoon;
Second step: super hard abrasive is poured in the pit, again wetting agent is poured in the super hard abrasive diamond, make the full diamond of super hard abrasive portion moistening;
The 3rd step: will expect stirring repeatedly with the steel spoon, and pour out and refund again in the barrel after sieving that sieving, it is more even to help batch mixing;
The 4th step: putting into length is 3～4 of 200mm left and right sides steel chains, builds the barrel lid, the start batch mixing, and general mixing time is 30～60min, the rotating speed 40～100rpm of batch mixer;
The 5th step: shut down to detect, whether the range estimation powder has or not color spot, conglomeration, abrasive material even etc.
4., Thermocompressed sintering and forming
The processing step of hot pressed sintering is: graphite jig inspection-thermal baffle on coating release agent-charging-pad on the die wall-sending into forcing press precompressed-energising heats pressurization-heat-insulation pressure keeping-release-cooling-demoulding; Earlier graphite jig, steel body tooth body 3 and carbide alloy crown 1 are assembled, then the compound of super hard abrasive and carcass powder is packed into mould and send into the forcing press precompressed, the hot pressing of then switching on, carry out heat-insulation pressure keeping at last, the dwell pressure that adopts is 2～5MPa, sintering temperature is 900～1100 ℃, and the heat-insulation pressure keeping time is 5～10min;
5., sandblast
After tooth head 2 sintering are finished, it is carried out sandblast, the sandblast operation is carried out on sand-blasting machine.
The first step: when necessary checkout facility operating condition is worked before the sandblast, must wear respirator and safety goggles;
Second step: when processing little workpiece, take workpiece one hand control spray gun on the other hand; When processing heavy workpiece, place it on the rotary table, control spray gun above it.
Explanation is at last, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, other modifications that those of ordinary skills make technical scheme of the present invention or be equal to replacement, only otherwise break away from the spirit and scope of technical solution of the present invention, all should be encompassed in the middle of the claim scope of the present invention.
Claims (4)
1, a kind of impregnated with diamond-carbide alloy strong wear resistance pick, comprise steel body tooth body (3), tooth head (2) and carbide alloy crown (1), it is characterized in that: described steel body tooth body (3) and described tooth head (2) and described carbide alloy crown (1) are directly to pass through powder metallurgy method, utilize heat pressing process to be sintered into one; The raw material of described tooth head (2) comprises carcass powder and super hard abrasive, described carcass powder is a cobalt powder, nickel powder, iron powder, copper powder, manganese powder, glass putty, chromium powder and tungsten-carbide powder or employing cobalt, nickel, iron, the pre-alloyed powder of manganese and chromium replaces all or part of described cobalt powder, nickel powder, iron powder, five kinds of metal powders of manganese powder and chromium powder, adopt the pre-alloyed powder of copper and tin to replace all or part of copper powder and glass putty, adopt the ditungsten carbide powder to replace all or part of tungsten-carbide powder, described carcass powder particle diameter is not more than 0.074mm, wherein, cobalt powder, nickel powder, iron powder, the gross weight of manganese powder and five kinds of metal powders of chromium powder accounts for 10%～60% of carcass powder gross weight, the gross weight of copper powder and glass putty accounts for 10%～40% of carcass powder gross weight, and tungsten-carbide powder weight accounts for 20%～80% of carcass powder gross weight; Described super hard abrasive adopts diamond, and the diamond particles degree is 0.42mm～0.074mm, and the ratio that adamantine volume accounts for described tooth head 2 volumes is 5%～50%.
2, make the technology of the described impregnated with diamond of claim 1-carbide alloy strong wear resistance pick, it is characterized in that: carry out successively according to the following steps:
A, carcass powder batch mixing
Get the carcass powder raw material by prescription, adopt ball mill mixing machine batch mixing then, dry sealing is preserved to the carcass powder after mixed;
B, working layer materials compounding
Get super hard abrasive and the mixed carcass powder of a step by prescription, take by weighing wetting agent by 1%～2% of carcass powder quality total amount, wetting agent adopts a kind of or two or more mixtures in glycerine, paraffin, machine oil and the alcohol, and super hard abrasive, carcass powder and wetting agent are mixed;
C, Thermocompressed sintering and forming
Earlier mould, steel body tooth body 3 and carbide alloy crown 1 are assembled, then will be through pack into mould and send into the forcing press precompressed of the compound of the super hard abrasive of b step and carcass powder, the hot pressing of then switching on, carry out heat-insulation pressure keeping at last, pressure is 2～5MPa when wherein switching on hot pressing, sintering temperature is 900～1100 ℃, and heat-insulation pressure keeping and sintering time are 5～10 minutes;
D, sandblast
On sand-blasting machine, hot-forming tooth head is carried out sandblast.
3, the manufacture craft of impregnated with diamond according to claim 2-carbide alloy strong wear resistance pick is characterized in that:
In a step, the carcass powder raw material that will meet prescription earlier stirs in vessel by hand, is using ball mill mixing machine batch mixing then; During with ball mill mixing machine batch mixing, cumulative volume according to carcass powder raw material and batch mixing ball is that 50%～70% of spherical tank volume is selected ball mill, according to carcass powder raw material quality and batch mixing ball mass ratio is that the ratio of 1:1～1.5 takes by weighing the batch mixing ball, the batch mixing ball adopts sintered carbide ball, and choose the sphere diameter mix and match that varies in size and use, the batch mixer rotating speed is chosen as per minute 30～100 changes mixing time 1～4 hour; Shut down at last, mixed carcass powder and ball are sieved separately.
4, according to the manufacture craft of claim 2 or 3 described impregnated with diamond-carbide alloy strong wear resistance picks, it is characterized in that:
In step b, adopt batch mixer that super hard abrasive, carcass powder and wetting agent are mixed, specifically may further comprise the steps:
The first step: pour load weighted carcass powder into the batch mixer barrel, shakeout, in the middle of material, extrude a pit;
Second step: super hard abrasive is poured in the pit, again wetting agent is poured in the super hard abrasive, make super hard abrasive all moistening;
The 3rd step: manual stir superhard material and carcass powder repeatedly, pour out sieve after, refund again in the batch mixer barrel;
The 4th step: put into length in the batch mixer barrel and be 3～4 of steel chains about 200mm, build batch mixer barrel lid, the start batch mixing, mixing time is 30～60 minutes, Revolution Per Minute 40～100 commentaries on classics of batch mixer;
The 5th step: shut down and detect, the range estimation powder has or not color spot, conglomeration, and whether batch mixing is even.
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| CNA2009100429336A CN101509375A (en) | 2009-03-23 | 2009-03-23 | Inlaid diamond-cemented carbide strong wear resistant pick and producing technique thereof |
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| CN102108866A (en) * | 2009-12-24 | 2011-06-29 | 闵利新 | Novel-structure wear-resistant bit tooth |
| CN102155167A (en) * | 2011-03-24 | 2011-08-17 | 中南大学 | Polycrystalline diamond-hard alloy composite rock-breaking button |
| AU2010206065B1 (en) * | 2010-07-30 | 2011-10-27 | Sandvik Intellectual Property Ab | Metal matrix pick |
| CN102233427A (en) * | 2010-04-30 | 2011-11-09 | 浙江金平拉丝模有限公司 | Method for manufacturing gemstone painting die sintered body |
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