CN102052058A - Method for producing novel high-grade rock drilling diamond compound tooth - Google Patents
Method for producing novel high-grade rock drilling diamond compound tooth Download PDFInfo
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- CN102052058A CN102052058A CN 201010512257 CN201010512257A CN102052058A CN 102052058 A CN102052058 A CN 102052058A CN 201010512257 CN201010512257 CN 201010512257 CN 201010512257 A CN201010512257 A CN 201010512257A CN 102052058 A CN102052058 A CN 102052058A
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Abstract
The invention relates to a method for producing a novel high-grade rock drilling diamond compound tooth. The method comprises the following steps of: adding high-purity alcohol and hard alloy balls to a bonding agent consisting of micro powder, carbides of metal Co and Ni and a carbonitride to mix into a diamond mixture; mixing the diamond mixture, double-layer metal molybdenum, a niobium cup and a hard alloy substrate to form an internal synthesis module element, and purifying the internal synthesis module element with hydrogen and argon in vacuum; putting the purified internal synthesis module element into a NdCl spherical lining die, and loading the NdCl spherical lining die into a graphite heating pipe, wherein a set of magnesium oxide suit cups are assembled on the outer wall of the graphite heating pipe; loading the graphite heating pipe into a pyrophyllite synthesis block, and putting the pyrophyllite synthesis block into a conducting steel bowl to form a pyrophyllite ring; assembling into a synthesis die assembly and carrying out high-temperature ultrahigh pressure synthesis, wherein the synthesis temperature is controlled within a diamond stability area; and carrying out rough machining, fine machining, polishing and shaping on a semi-finished product to obtain a product. The percent of pass of the product is higher than 90 percent, and the product has the advantages of good shock resistance toughness, wear resistance and stability and long service life and can be used for wear resistant rock stratums or cracked stratums.
Description
Technical field
The present invention relates to a kind of novel high grade diamond composite teeth, mainly is to be used in the diamond composite teeth that uses on the instruments such as tricone bit, down-the-hole drilling tool, coal cutting teeth, road breaking tooth.
Background technology
In recent years, more and more higher along with developing rapidly of modern industry to the performance requirement of engineering goods, wish its can be under high temperature, high pressure, high-speed condition work steady in a long-term, thereby very high requirement has been proposed the performance of material.Particularly, wish that more it has the performance of high rigidity, high-wearing feature and high rotproofness to the boring means on hard formation and abrasion resistance stratum.As the main drilling tool of oil, natural gas, mine rock drilling exploitation etc., its quality directly influences drilling depth, speed, the cost factor of rock drilling.
And at present at the carbide alloy rock bit of fields such as oil, geological prospecting, mining, engineering construction use, the diamond hard alloy tooth of down-the-hole drilling tool, its production method is as follows:
The raw material diamond select for use 230/270,270/325 order granularity each 50%, binding material is selected metal Co for use, granularity is 325 orders, diamond by 90% and 10% Co prepare, ball-milling medium is a sintered carbide ball, and ratio of grinding media to material is 15: 1, and the ball grinding cylinder rotating speed is 150 rev/mins, time 3h is easy to generate the material uneven problem that is mixed.
In the assembling of synthetic mould be at the diamond compound through independent application of vacuum, or binding material carries out after the hydrogen shield reduction through carrying out packaging technology after being mixed again.Metal cup adopts thick molybdenum cup of 0.076mm and hard alloy substrate to form.Assembling mode is the individual layer molybdenum cup of packing into after the diamond compound weighed, and adds hard alloy substrate, removes at hand then and synthesizes mould in being compacted on the press.Because of adopting manual process, the material assembling is fine and close inadequately.
In before the synthetic module dress, at first the Co powder is carried out the hydrogen reducing purified treatment, carry out application of vacuum after again Co powder and diamond being mixed, synthesize mould in assembling then.Its weak point is to purify not thoroughly, in assembling procedure, because built-up time is long, can cause synthetic middle product to crack to material production repeated oxidation and the pollution that purified, causes diamond layer and the layering of hardness alloy interface to come off in the time of seriously.
In synthetic mould assembly assembling, adopt pyrophillite piece, pyrophillite ring, dolomite lining, Conducting steel bowl, conduction titanium sheet to do pressure transmission, the outer synthetic mould of sealing medium composition.Interior synthetic mould is put into NdC
1In the spherical lining mould, NdC is adopted in the other end
1Sheet seals, and the graphite heating of packing into then pipe puts the dolomite lining, and in the synthetic piece of the pyrophillite of packing into, the titanium sheet is put at two earlier up and down, puts into Conducting steel bowl, pyrophillite ring again, is assembled into a complete synthetic mould assembly.Adopt the heating of carbon pipe heater-type; radially periphery is high, the center is low in the thermal field of inside cavity; center height, two ends are low vertically; when periphery sinters; " underburnt " usually appears in the centre; and when the position, center sintered, crystal grain misgrowth phenomenon usually can take place in peripheral part, had caused very big difficulty in synthetic.
Superhigh-pressure high-temp synthesizes semiproduct, and the synthesis technique flow process is: earlier with press preheating-synthesis pressure, power, time are set, intensifications of boosting, pressure-maintaining and heat-preservation, pressurize cooling, pressurize wait, step-down, end of synthesis.
Semiproduct roughing.Roughing corase grind cylindrical carries out on centreless grinding machine bed, selects 80/100 order skive for use, controls the depth of cut well, the diamond layer forward direction, and the corase grind cylindrical, coolant rate is moderate.The corase grind cylindrical requires to keep surplus 0.1mm.The roughing of carbide alloy plane is carried out on surface grinding machine, selects 80/100 order skive for use, and semiproduct are changeed next procedure with flat surface grinding, the fixing back of special fixture.
Semiproduct fine finishining, semiproduct fine finishining is processed on centreless mill, flat stone mill lathe equally, just having changed skive into 160/180 order must clean grinding machine one time before correct grinding, being exempted from thick refuse influences product glossiness, simultaneously with just entering the correct grinding procedure behind the silicon carbide grinding wheel finishing centreless mill guide wheel.Require the depth of cut little during correct grinding, it is big that coolant rate is wanted.
Shortcomings such as the hardness of the diamond hard alloy tooth of producing is not high enough, toughness is not high enough, application life is short, have a strong impact on operating efficiency and drilling cost, particularly more than the medium ground, strong mill property stratum and inhomogeneous formation, more do not catch up with the needs of development speed, become the bottleneck in the drilling well of restriction China, mining, the construction.In order to adapt to the needs in drilling well, the mining engineering construction, the toughness and the abrasion resistance that improve diamond composite teeth are necessary.
Summary of the invention
The objective of the invention is at above-mentioned present situation, aim to provide a kind of toughness height, abrasion resistance is strong, be suitable in creep into the novel high grade rock drilling diamond composite teeth production method of long service life, high efficiency in hard above geology and the bad ground.
The implementation of the object of the invention is, novel high grade rock drilling diamond composite teeth production method, and concrete steps are as follows:
1) diamond differential and metal Co, Ni, carbide and carbonitride are made binding material, and add high purity ethanol and sintered carbide ball, stir 20-24h, be mixed, pour out waste liquid, under 100-120 ℃ of temperature, dry, add the 2C forming agent, continue the 1-2h that is mixed, the cleaning sintered carbide ball
Diamond grit is chosen as: 5-20 μ m, and the weight ratio of each composition of binding material is Co: Ni: carbide: carbonitride 10%: 3%: 4%: 1%, the binding material granularity: 5-10 μ m, the weight ratio of diamond and binding material is 80%: 20%,
The addition of high purity ethanol should surpass more than the material 50mm, and the weight ratio of the addition of sintered carbide ball and batch mixing amount is 15: 1, sintered carbide ball sphere diameter ф 5-12mm, and 2C forming agent addition is the 1-5% of inventory,
2) double-deck a set of cups of clean metal molybdenum, niobium and hard alloy substrate add the diamond compound in the molybdenum cup, and the hard alloy substrate of packing into adds and puts the metal niobium cup, then puts into special-purpose punching block, compacting on the 5T belt type press, and synthetic module unit in forming,
3) vacuum, hydrogen, argon gas body continuous purification are handled,
Interior synthetic module unit is packed in the special-purpose molybdenum boat, put successively, not overlapping, be one group with 30-50, put into vacuum drying oven and vacuumize 1.0 * 10
4Pa, 600 ℃ of insulation 1h carry out the reduction of hydrogen argon gas body and handle, 800 ℃ of insulation 1h,
4) synthetic mould assembly assembling: the first taking-up of interior synthetic module put into the spherical lining mould of NdCl, the other end adopts the NdCl sheet to seal, and in the graphite heating pipe of packing into then, graphite heating pipe upper and lower is respectively put a slice graphite heating sheet, assembling one cover magnesia a set of cups on graphite heating pipe outer wall, the magnesia a set of cups is loaded onto the dolomite lining, and in the synthetic piece of the pyrophillite of packing into, conduction titanium sheet is put at two ends earlier up and down, put into Conducting steel bowl again, the pyrophillite ring is assembled into synthetic mould assembly
5) superhigh-pressure high-temp is synthetic: the synthesis technique flow process is the press preheating, synthesis pressure, power, time is set, the intensification of boosting, pressure-maintaining and heat-preservation, pressurize cooling, pressurize wait, step-down, end of synthesis, and synthesis temperature is controlled in the diamond stability region.
6) semiproduct roughing, the corase grind cylindrical carries out on centreless grinding machine bed, and with 80-100 order skive, the corase grind cylindrical requires to keep surplus 0.1mm, and plane roughing is carried out on surface grinding machine, selects 80-100 order skive for use,
7) semiproduct machine finishing is finish grinded cylindrical, plane on centreless mill, surface grinding machine, with 160-180 order skive,
Carry out the carbide alloy chamfering with 120/140 order skive on universal cutter grinder, chamfering is 18 ° * 2.5mm,
8) ball milling 10h polishes shaping on ball mill, and water cleans, and carries out processed with methyl alcohol, dry product.
The present invention is high purity ethanol and sintered carbide ball in batch mixing, by traditional dry mixing process, changes into wet mixing technology, and material is mixed more even, and it is more convenient accurate to assemble; Adopt vacuum deaeration and the reduction of metallic bond is handled, materials purification is more thorough; Again same purified treatment has been carried out on double-level-metal cup, hard alloy substrate top layer, reduced repeated oxidation and the pollution in the postorder assembling process of raw material and part; Adopted molybdenum, niobium double-level-metal cup, the thick 0.2mm. of metal niobium cup, with press compacting in punching block, the material assembling is finer and close; Make the protection barrier with magnesium oxide material,, can improve the quality and the qualification rate of product to an equilibrium and pressure stable, thermal field are provided in the synthetic die cavity body because magnesium oxide material has very high heat resistance, sealing performance and heat insulation effect.
Product product percent of pass＞90% with the present invention's production, toughness, abrasion resistance, Heat stability is good, long service life, can on oil drilling, the drilling tool of probing, use, can in abrasion resistance rock stratum or broken formation, use with other exploitation fields such as tricone bit, mining rock drill, coal cutting teeth and road breaking tooth.
The specific embodiment
The present invention selects for use the MBD10 gem grade diamond to be made into micro mist, granularity is controlled to be 5/20 μ m, through making binding material with metal Co, Ni, carbide and carbonitride after the soda acid purified treatment, the weight ratio of each composition of binding material is Co: Ni: carbide: carbonitride 10%: 3%: 4%: 1%.The weight ratio of diamond and binding material is 80%: 20%.
Add high purity ethanol and sintered carbide ball batch mixing in ball mill.The addition of high purity ethanol should surpass more than the material 50mm.Ball-milling medium is a sintered carbide ball, and the weight ratio of the addition of sintered carbide ball and batch mixing amount is 15: 1, sphere diameter ф 5-12mm.The ball grinding cylinder revolution is 150 rev/mins.Stir 20-24h, be mixed, pour out waste liquid, under 100-120 ℃ of temperature, dry, add the 2C forming agent, continue the 1-2h that is mixed, the cleaning sintered carbide ball.
The present invention is high purity ethanol and sintered carbide ball in batch mixing, by traditional dry mixing process, changes into wet mixing technology, and material is mixed more even, and it is more convenient accurate to assemble.
The diamond compound is taken out, on 1/1000 balance, put into five molybdenum cups the diamond compound is added every cup, hard alloy substrate is put in taking-up then, adds to put the metal niobium cup again, and the niobium wall of cup is thick to be 0.2mm.Interior synthetic module unit after the assembling is put into special-purpose punching block, synthesize module unit in compacting is formed on the 5T belt type press.With cushion block control compacting height and pressure.
Used the metal niobium cup in the assembling,, made the material assembling finer and close with the compacting in punching block of 5T press.
Metal molybdenum, the double-deck a set of cups of niobium are added dilute sulfuric acid carry out oil removing, rust cleaning cleaning in ultrasonic equipment, it is standby to wash neutrality to dry up with hair dryer repeatedly with deionized water then, and hard alloy substrate adopts the same manner to purify cleaning.Reduced repeated oxidation and the pollution in the postorder assembling process of raw material and part.
Purified treatment is that interior synthetic module unit is packed in the special-purpose molybdenum boat, puts successively, and is not overlapping, is one group by the size of product size with 30-50, puts into vacuum drying oven and vacuumizes 1.0 * 10
4Pa, 600 ℃ of insulation 1h carry out the reduction of hydrogen argon gas body and handle, and strict control hydrogen flowing quantity is 3 liters/minute, 800 ℃ of insulation 1h,
The present invention adopts vacuum deaeration and the reduction of metallic bond is handled, and materials purification is more thorough; Same purified treatment has been carried out on double-level-metal cup, hard alloy substrate top layer, reduced repeated oxidation and the pollution problem in the postorder assembling process of raw material and part; Adopted molybdenum, niobium double-level-metal cup, with press compacting in punching block, the material assembling is finer and close.
Synthetic mould assembly assembling: the first taking-up of interior synthetic module put into the spherical lining mould of NdCl, the other end adopts the NdCl sheet to seal, and in the graphite heating pipe of packing into then, graphite heating pipe upper and lower is respectively put a slice graphite heating sheet, assembling one cover magnesia a set of cups on graphite heating pipe outer wall, the magnesia a set of cups is loaded onto the dolomite lining, and in the synthetic piece of the pyrophillite of packing into, conduction titanium sheet is put at two ends earlier up and down, put into Conducting steel bowl again, the pyrophillite ring is assembled into synthetic mould assembly
The present invention has added magnesia magnesia a set of cups between graphite heating pipe and interior synthetic module unit; protection barrier as inside and outside synthetic intersection; NdCl solution in having prevented under superhigh-pressure high-temp in the synthetic mold materials has also prevented the fluctuation of temperature simultaneously to the dipping of graphite heating pipe.Adopted the magnesia a set of cups, inwall is sealed in NdCl in a set of cups in addition, and the pyrotoxin of external controllable system graphite heating pipe makes the interior temperature of synthetic die cavity body reach balanced effect.Simultaneously also guarantee graphite heating pipe excellent conducting performance, more helped the carrying out of synthesis technique.Respectively increased by 1 graphite heating plate at graphite heating pipe upper and lower,, made the interior temperature of synthetic die cavity body more balanced to improve the sintering temperature at axial two ends.
Superhigh-pressure high-temp is synthetic, and the synthesis technique flow process is: earlier with press preheating-synthesis pressure, power, time are set, and intensifications of boosting, pressure-maintaining and heat-preservation, the pressurize cooling, the pressurize wait, semiproduct are synthesized in step-down.
Synthetic parameters is provided with as follows:
Pressure: 85/90mpa,
Power: first power: 2950/3000w (100%),
Second power: 1600/1650w (56%);
Time: boost: 60s
First power pressure-maintaining and heat-preservation: the 6min
Second power pressure-maintaining and heat-preservation: the 2min.
Synthesis temperature is controlled in the diamond stability region.
Semiproduct carry out carrying out roughing after the initial survey classification, and the corase grind cylindrical carries out on centreless grinding machine bed, with 80-100 order skive.The depth of cut is controlled in requirement well, the diamond layer forward direction, and coolant rate is moderate.The corase grind cylindrical requires to keep surplus 0.1mm, and plane roughing is carried out on surface grinding machine, selects 80-100 order skive for use,
Semiproduct fine finishining is processed on centreless mill, flat stone mill lathe equally, just changed skive into the 160-180 order, before correct grinding, grinding machine must be cleaned one time, being exempted from thick refuse influences product glossiness, simultaneously with just entering the correct grinding procedure behind the silicon carbide grinding wheel finishing centreless mill guide wheel.Require the depth of cut little during correct grinding, it is big that coolant rate is wanted.The processing diameter tolerance: ± 0.05, height tolerance: ± 0.1
After finishing fine finishining, on universal cutter grinder, carry out the carbide alloy chamfering with 120/140 order skive, chamfering is 18 ° * 2.5mm.
Polish shaping at last ball milling 10h, water cleans, and carries out processed with methyl alcohol, dry product.
Product after the fine finishining is put into ball mill, adds entry, cleaning fluid, sand ball milling 10h, polishes shaping.Water cleaned after ball milling was finished, and carried out processed with methyl alcohol at last, changed check problem over to after the hair dryer oven dry.
All products are tested one by one, and outward appearance, dimension control are to qualified, and the qualified products packing is put in storage.
Target level of product quality (company standard)
A toughness: 800/1000J GB 400J (outstanding level)
B abrasion resistance: 15/20 * 10
4GB 15 * 10
4(outstanding level)
C heat stability: 〉=700 ℃ of GBs.
Claims (1)
1. novel high grade rock drilling diamond composite teeth production method is characterized in that concrete steps are as follows:
1) diamond differential and metal Co, Ni, carbide and carbonitride are made binding material, and add high purity ethanol and sintered carbide ball, stir 20-24h, be mixed, pour out waste liquid, under 100-120 ℃ of temperature, dry, add the 2C forming agent, continue the 1-2h that is mixed, the cleaning sintered carbide ball
Diamond grit is chosen as: 5-20 μ m, and the weight ratio of each composition of binding material is Co: Ni: carbide: carbonitride 10%: 3%: 4%: 1%, the binding material granularity: 5-10 μ m, the weight ratio of diamond and binding material is 80%: 20%,
The addition of high purity ethanol should surpass more than the material 50mm, and the weight ratio of the addition of sintered carbide ball and batch mixing amount is 15: 1, sintered carbide ball sphere diameter ф 5-12mm, and 2C forming agent addition is the 1-5% of inventory,
2) double-deck a set of cups of clean metal molybdenum, niobium and hard alloy substrate add the diamond compound in the molybdenum cup, and the hard alloy substrate of packing into adds and puts the metal niobium cup, then puts into special-purpose punching block, compacting on the 5T belt type press, and synthetic module unit in forming,
3) vacuum, hydrogen, argon gas body continuous purification are handled,
Interior synthetic module unit is packed in the special-purpose molybdenum boat, put successively, not overlapping, be one group with 30-50, put into vacuum drying oven and vacuumize 1.0 * 10
4Pa, 600 ℃ of insulation 1h carry out the reduction of hydrogen argon gas body and handle, 800 ℃ of insulation 1h,
4) synthetic mould assembly assembling: the first taking-up of interior synthetic module put into the spherical lining mould of NdCl, the other end adopts the NdCl sheet to seal, and in the graphite heating pipe of packing into then, graphite heating pipe upper and lower is respectively put a slice graphite heating sheet, assembling one cover magnesia a set of cups on graphite heating pipe outer wall, the magnesia a set of cups is loaded onto the dolomite lining, and in the synthetic piece of the pyrophillite of packing into, conduction titanium sheet is put at two ends earlier up and down, put into Conducting steel bowl again, the pyrophillite ring is assembled into synthetic mould assembly
5) superhigh-pressure high-temp is synthetic: the synthesis technique flow process is the press preheating, synthesis pressure, power, time is set, the intensification of boosting, pressure-maintaining and heat-preservation, pressurize cooling, pressurize wait, step-down, end of synthesis, and synthesis temperature is controlled in the diamond stability region.
6) semiproduct roughing, the corase grind cylindrical carries out on centreless grinding machine bed, and with 80-100 order skive, the corase grind cylindrical requires to keep surplus 0.1mm, and plane roughing is carried out on surface grinding machine, selects 80-100 order skive for use,
7) semiproduct machine finishing is finish grinded cylindrical, plane on centreless mill, surface grinding machine, with 160-180 order skive,
Carry out the carbide alloy chamfering with 120/140 order skive on universal cutter grinder, chamfering is 18 ° * 2.5mm,
8) ball milling 10h polishes shaping on ball mill, and water cleans, and carries out processed with methyl alcohol, dry product.
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| CN201010512257A CN102052058B (en) | 2010-10-20 | 2010-10-20 | Method for producing novel high-grade rock drilling diamond compound tooth |
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| CN201010512257A CN102052058B (en) | 2010-10-20 | 2010-10-20 | Method for producing novel high-grade rock drilling diamond compound tooth |
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| CN102052058B CN102052058B (en) | 2012-09-26 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102581271A (en) * | 2012-03-30 | 2012-07-18 | 吉林大学 | Powder metallurgy material mixing method |
| CN102606083A (en) * | 2012-03-29 | 2012-07-25 | 山东聊城昌润超硬材料有限公司 | Diamond cutter and manufacturing method thereof |
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| CN2526491Y (en) * | 2002-05-09 | 2002-12-18 | 王光 | Composite tooth for roller bit |
| CN101100930A (en) * | 2007-07-24 | 2008-01-09 | 江汉石油钻头股份有限公司 | Surface strengthening steel tooth wheel and manufacturing method thereof |
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| CN2526491Y (en) * | 2002-05-09 | 2002-12-18 | 王光 | Composite tooth for roller bit |
| US20080011519A1 (en) * | 2006-07-17 | 2008-01-17 | Baker Hughes Incorporated | Cemented tungsten carbide rock bit cone |
| EP2079898A1 (en) * | 2006-09-29 | 2009-07-22 | Baker Hughes Incorporated | Earth-boring rotary drill bits including bit bodies having boron carbide particles in aluminum or aluminum-based alloy matrix materials, and methods for forming such bits |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102606083A (en) * | 2012-03-29 | 2012-07-25 | 山东聊城昌润超硬材料有限公司 | Diamond cutter and manufacturing method thereof |
| CN102606083B (en) * | 2012-03-29 | 2014-04-16 | 山东昌润钻石股份有限公司 | Diamond cutter and manufacturing method thereof |
| CN102581271A (en) * | 2012-03-30 | 2012-07-18 | 吉林大学 | Powder metallurgy material mixing method |
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| CN102052058B (en) | 2012-09-26 |
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