CN103982139A - High matrix drilling tooth and preparation method thereof - Google Patents
High matrix drilling tooth and preparation method thereof Download PDFInfo
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- CN103982139A CN103982139A CN201410210867.XA CN201410210867A CN103982139A CN 103982139 A CN103982139 A CN 103982139A CN 201410210867 A CN201410210867 A CN 201410210867A CN 103982139 A CN103982139 A CN 103982139A
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Abstract
The invention discloses a high matrix drilling tooth and a preparation method thereof. The high matrix drilling tooth comprises a diamond-containing metal-based working layer, a diamond-free transition layer and a welding layer, wherein one to four reinforcing layer(s) is/are added in the thickness direction in the working layer of the high matrix drilling tooth, namely the tooth arc radial direction; the reinforcing layers are firmly combined with the working layer of the drilling tooth by compression moulding and sintering processes; the breaking strength of a drill bit which is manufactured by the drilling tooth is greatly improved. According to the high matrix drilling tooth which is manufactured by the method, the drilling tooth is not easy to break off, the drilling tooth can be normally consumed until the diamond-containing layer is used up, and the service life of the drill bit which is manufactured by the drilling tooth is longer than that of a common drill bit; meanwhile, due to the existence of the reinforcing layers, an annular water groove is formed in the working face of the drilling tooth, the drilling specific pressure is favorably improved, the drilling efficiency is improved, the drilling stability and the chip removal and cooling capacities are also improved.
Description
Technical field
The invention belongs to geological drilling with boring tooth field, particularly a kind of high carcass bores tooth and preparation method thereof, is applicable to make long-life high efficiency geology drill bit, especially deep prospecting and creeps into and use geological drill bit.
Background technology
Conventional diamond core bit manufacture craft not have too large variation for a long time, conventionally adopts the integral sintered method of intermediate frequency formula, steel body is passed through to high temperature sintering with brill toothed portion together with.In recent years, minimizing along with superficial part mineral resources allowable exploitation, progressively (>1000m), the development of stratum, super deep (>3000m) to deep of mineral resources exploration, because conventional bit is low application life, average life span, conventionally less than 60m, causes in drilling construction, often need to remove drilling rod and carry out bit change-over, the time that removes drill bit consumption often accounts for 40% of whole engineering construction, has greatly affected efficiency of construction.
At present, the raising measure of bit life is mainly comprised and bores the optimization of tooth formula, the adjustment of diamond parameter etc.For boring tooth formula, generally by raising, bore tooth tyre body hardness, abrasiveness, thereby reduce the rate of wear of carcass while creeping into, the method is very limited for the raising of bit life, because tyre body hardness, mar proof can unconfinedly promote, can only be to match with adamantine wearing and tearing, otherwise after can causing last layer Diamond Wear, new diamond cannot go out sword and creep into and carve rock work, causes that drill bit " skids ", the burning of bits; For diamond parameter, conventionally by improving diamond concentration, adjusting the methods such as diamond grit in the hope of reaching the object that improves the life-span, or employing high grade diamond, thus single adamantine rate of depreciation is reduced, yet, this kind of method is also very limited for the lifting of bit life, diamond concentration can not arbitrarily increase, and concentration is too high, and carcass weakens the adamantine ability of plating, diamond is easy to come off, and tends to cause drilling life of bit lower.
When available technology adopting independence sintering, method for laser welding are manufactured geological drill bit, often need to increase and bore tooth height, to improve the frequency that makes a trip of drill bit in bit life, minimizing drilling project, improve engineering efficiency.In recent years, also relevant for adopting new construction design, thereby promote the technology of bit life, as Chinese patent CN101353946A, a kind of diamond core bit of the renewable mouth of a river is disclosed, proposition is appropriate design structure, realize the multiple stratification of boring tooth and the mouth of a river, thereby increased the used height of carcass, but the method complex manufacturing technology, must adopt the integral sintered method manufacture of intermediate frequency, and inside and outside being unfavorable for making, there is the brill tooth of the special carcass structures such as the poor or inside and outside matrix formula of diamond concentration is differential.
Summary of the invention
The technical issues that need to address of the present invention are, overcome the deficiencies in the prior art, provide a kind of high carcass to bore tooth, to solve the strengthening problem of high carcass brill tooth for preparation long-life geological drill bit.
A kind of high carcass provided by the invention bores tooth, comprise working lining, transition zone and weld layer, working lining is diamantiferous metal-base composites, transition zone is working lining and the material that is connected of weld layer, transition zone is not containing diamond, and weld layer is the connecting portion that bores tooth and steel body, and weld layer is not containing diamond, in described brill tooth working lining, thickness direction adds enhancement Layer, enhancement Layer and brill tooth working lining strong bonded.
The preferred 15-35mm of height of described brill tooth, the preferred 12-30mm of working lining height.
Described enhancement Layer is preferably realized by sintering with brill tooth working lining strong bonded.
The preferred 1-4 layer of described enhancement Layer.
Described enhancement Layer material preferred glass fibers, carbon fiber, stainless steel, alloy steel has the material of higher-strength.
Described enhancement Layer material is preferably sheet, netted, thread array arrangement.
The thickness of described enhancement Layer material is according to brill tooth Thickness Design, preferably 0.5-1.5mm.
Described enhancement Layer arc length is along the circumferential direction preferably greater than bores 75% of sector length, along the length of boring tooth height direction, be preferably greater than and bore 80% of tooth working lining, and enhancement Layer preferably penetrates the binding site of working lining and transition zone, the degree of depth that makes enhancement Layer extend into transition zone is preferably greater than 0.5mm.
The surfaces externally and internally of described brill tooth can be inlayed glomerocryst or not inlay glomerocryst, and glomerocryst is inlayed position can be in transition zone part, also can be in working lining part, or two parts have concurrently; Boring broken rock abrasive particle in tooth working lining can be diamond, can be also the mixture of diamond and broken glomerocryst.
The present invention also provides a kind of high carcass to bore the preparation method of tooth, comprises the following steps:
1) remove reinforcement material surface dirt, oxide layer, according to boring radially radian of tooth, reinforcement material is bent to required radian, as interlayer, use;
2) employing is colded pressing to suppress and is bored tooth carcass thin slice, and thin slice all comprises working lining, transition zone and weld layer;
3) enhancement Layer is sandwiched respectively in the middle of thin slice, pack mould into, by hot pressing, complete the making that high carcass bores tooth.
Described removal reinforcement material surface dirt, oxide layer, refer to before use, by deoiling, the operation such as sandblast, cleaning removes reinforcement material surface dirt, oxide layer, to improve material and the bond strength of boring tooth carcass.
The working lining of described brill tooth carcass thin slice, working lining composition is generally the complex of metallic bond carcass and diamond particles, metallic bond formula designs according to rock drilling Properties of Objects, be generally WC, Co, Ni, Cu etc. and add part low-melting-point metal and form, diamond particles is high grade Monosized powder or combination granularity, diamond concentration is generally 50-150% (emery wheel concentration system, volumetric concentration).
Described colds pressing, and the idiosome density of preferably colding pressing reaches 50-70%.
Described sandwiches enhancement Layer respectively in the middle of thin slice, packs mould into, preferably thin slice and enhancement Layer is fitted together, and assembly is put into mould, then on the top of assembly, pours respectively transition zone powder and weld layer powder into.Under the certain condition of enhancement Layer height, by hot pressing, enhancement Layer can penetrate the interface of working lining and transition zone, thereby has ensured the normal effect of enhancement Layer, can produce thus the high carcass of strengthening and bore tooth.
Described hot pressing, preferably carries out sintering by vacuum resistance hot press, and sintering temperature is 750-900 ℃, and total head pressure is 20-30MPa, and temperature retention time is 3-10min.
Further, preferably by vacuum resistance hot press, carry out sintering, sintering temperature is 780-880 ℃, and total head pressure is 20-30MPa, and temperature retention time is 3-10min.
High carcass after strengthening is bored to tooth by solder side light, planarizing process, adopt laser-beam welding machine to realize the welding of boring tooth and steel body, carry out afterwards the processing such as interior external flume, screw thread, chamfering, can produce the diamond core bit of the high carcass brill tooth with strengthening.
Used the drill bit of the technology of the present invention to carry out rock stratum probing, can ensure normal use the continuously of high carcass working lining, and boring the formation of tooth work plane one or several spill guide groove, can ensure drill bit directional drilling, and raising is crept into specific pressure, is increased and creep into cooling surface, can possess high drilling efficiency and long creeping into the life-span simultaneously, for deep drilling, have great importance.
Compared with prior art, advantage of the present invention:
1) the present invention is by interlayer strengthening mechanism, adopt the clip type of the inner Materials with High Strength of carcass to distribute, thereby working lining can all normally be used, and by special internal construction designing and making process, realized the object of intermediate plate strengthening, make to bore tooth strengthening, significantly improved the anti-breaking strength of boring tooth, can ensure that high carcass bores tooth and in use do not rupture.
2) adopt method of the present invention, by intermediate plate, strengthen, make to bore tooth flexural strength, shear strength is increased dramatically, and because intermediate plate extend into not containing in diamond transition zone, making to bore the whole fracture of tooth plane of weakness transfers to below not diamantiferous transition zone, bulk strength is high, bores the generation of the improper fracture of tooth in the time of avoiding drill bit to use.
3) the present invention is by arranging transition zone, weld layer, can realize the laser weld of geological drill bit, boring tooth adopts new compacting, sintering process method and structure design can improve the powder metallurgy sintered quality of boring tooth, the service behaviour of boring tooth itself is got a promotion, high carcass bores the application life that tooth can increase substantially drill bit, reduce and creep into the frequency that makes a trip, improve engineering efficiency.
Accompanying drawing explanation
Fig. 1 is the structural representation that high carcass bores tooth
Fig. 2 is sandwich material shape schematic diagram
Fig. 3 is that interlayer is strengthened high carcass brill tooth schematic diagram
In figure, identify: 1, diamond abrasive grain, 2, working lining, 3, transition zone, 4, weld layer, 5, enhancement Layer material, 6, thin slice.
The specific embodiment
With embodiment, the invention will be further described below, but the present invention is not limited to these embodiment.
As shown in Figure 1: the height that high carcass bores tooth is 15-35mm, by forming containing the working lining 2 of diamond abrasive grain 1 and the transition zone 3 and the weld layer 4 that do not contain diamond abrasive grain 1, working lining 2 is the main bodys of boring the broken rock of tooth, weld layer 4 is for connecting drilling bit steel body, transition zone 3 is working linings 2 and the part that is connected of weld layer 4, for improving, bores tooth bulk strength.
As shown in Figure 2: enhancement Layer can select glass fiber, carbon fiber, stainless steel, alloy steel etc. to have the material of high strength, the characteristic such as high temperature resistant, the shape of material can be sheet, netted, small pieces or thread array arrangement etc., its thickness is determined according to the thickness that bores tooth, is generally 0.5-1.5mm.
As shown in Figure 3: because the working lining 2 containing diamond 1 is to bore the weakest part of tooth intensity, therefore enhancement Layer material 5 need be evenly distributed in working lining 2, and penetrate the bottom of working lining 2, make the weak plane of disruption to not containing transition zone 3 or weld layer 4 transfers of diamond 1, thereby bore the anti-fracture energy of tooth, be increased dramatically.
Embodiment 1:
The brill tooth of φ 59/ φ 41.5 of take is example, creeping into object is 9 grades of drillability ranks, medium abrasive rock, it is 20mm that tooth overall height is bored in design, wherein working lining height is 16.5mm, transition zone is 1.5mm, weld layer is 2mm, boring tooth working lining formula is WC40-60%, Co10-15%, Ni5-10%, the element such as Cu, Sn 15-30%, diamond concentration is 65-85%, and granularity is 40/45,45/50 combination granularity, and design enhancement Layer material is foliated glass fibre plate, single thickness 0.65mm, is evenly distributed two-layer; Adopt special punching block, suppress that 2.45mm is thick, that 30mm is long is interior, in, outer three layers of fan-shaped brill tooth carcass thin slice, the enhancement Layer that 17mm is long, arc length direction both sides are respectively shorter than brill tooth 0.5mm is total to Liang Ceng Clip between thin slice, and near weld layer end, after being assembled in graphite jig, put into vacuum resistance hot press sintering, sintering temperature is 860 ℃, and total head pressure is 25MPa, temperature retention time is 6min, can burn out the high carcass geology of fibre strengthening and bore tooth.
Embodiment 2:
The brill tooth of φ 59/ φ 41.5 of take is example, creeping into object is 9 grades of drillability ranks, medium abrasive rock, it is 15mm that tooth overall height is bored in design, wherein working lining height is 12mm, transition zone is 1.5mm, weld layer is 1.5mm, boring tooth working lining formula is WC40-60%, Co10-15%, Ni5-10%, the element such as Cu, Sn 15-30%, diamond concentration is 65-85%, and granularity is 40/45,45/50 combination granularity, and design enhancement Layer material is netlike carbon fiber sheet, single thickness 0.50mm, is evenly distributed two-layer; Adopt special punching block, suppress that 2.45mm is thick, that 20mm is long is interior, in, outer three layers of fan-shaped brill tooth carcass thin slice, 10mm is long, arc length direction both sides are respectively shorter than the Jia Qiang Ceng Clip of brill tooth 0.5mm between thin slice, and near weld layer end, after being assembled in graphite jig, put into vacuum resistance hot press sintering, sintering temperature is 750 ℃, and total head pressure is 30MPa, temperature retention time is 10min, can burn out the high carcass geology of fibre strengthening and bore tooth.
Embodiment 3:
The brill tooth of φ 59/ φ 41.5 of take is example, creeping into object is 9 grades of drillability ranks, medium abrasive rock, it is 35mm that tooth overall height is bored in design, wherein working lining height is 30mm, transition zone is 3mm, weld layer is 2mm, boring tooth working lining formula is WC40-60%, Co10-15%, Ni5-10%, the element such as Cu, Sn 15-30%, diamond concentration is 65-85%, and granularity is 40/45,45/50 combination granularity, and design enhancement Layer material is thread alloy-steel sheet, single thickness 1.50mm, is evenly distributed two-layer; Adopt special punching block, suppress that 2.45mm is thick, that 40mm is long is interior, in, outer three layers of fan-shaped brill tooth carcass thin slice, 23mm is long, arc length direction both sides are respectively shorter than the Jia Qiang Ceng Clip of brill tooth 0.5mm between thin slice, and near weld layer end, after being assembled in graphite jig, put into vacuum resistance hot press sintering, sintering temperature is 900 ℃, and total head pressure is 20MPa, temperature retention time is 3min, can burn out intermediate plate and strengthen high carcass geology brill tooth.
Embodiment 4:
The brill tooth of φ 75/ φ 47.5 of take is example, creeping into object is 7 grades of drillability ranks, strong abrasiveness rock, and it is 30mm that tooth overall height is bored in design, wherein working lining height 25mm, transition zone is 3mm, weld layer is 2mm, and boring tooth working lining formula is WC50-70%, Co10-15%, Ni6-12%, the element such as Cu, Sn is 15-25% altogether, and diamond concentration is 75-100%, and granularity is 40/45,45/50,50/60 combination granularity; Design enhancement Layer material is stainless steel substrates, and single thickness is 0.8mm, bores transverse tooth thickness degree orientation average and distributes two-layerly, by required radian, steel disc is bent, and sandblast, cleaning treatment; In cold stamping die, first add load weighted working lining internal layer powder, add again first floor arc steel plate, add afterwards working lining middle level powder, after add second layer arc steel plate, then add the outer powder of working lining, by cold press, suppress the brill tooth working lining containing enhancement Layer, thickness is about 13.1mm, and length is 40mm; This working lining is packed in graphite jig, then pour respectively transition zone and weld layer powder into, be loaded on graphite mo(u)ld seaming chuck, put into vacuum resistance hot press and carry out sintering, sintering temperature is 880 ℃, and total head pressure is 30MPa, and temperature retention time is 8min, can burn out stainless steel substrates and strengthen high carcass geology brill tooth, bore the whole anti-breaking strength of tooth and bore tooth raising 40-110% compared to routine.
Embodiment 5:
The brill tooth of φ 75/ φ 47.5 of take is example, creeping into object is 7 grades of drillability ranks, strong abrasiveness rock, and it is 25mm that tooth overall height is bored in design, wherein working lining height 20mm, transition zone is 3mm, weld layer is 2mm, and boring tooth working lining formula is WC50-70%, Co10-15%, Ni6-12%, the element such as Cu, Sn is 15-25% altogether, and diamond concentration is 75-100%, and granularity is 40/45,45/50,50/60 combination granularity; Design enhancement Layer material is stainless steel substrates, and single thickness is 0.8mm, bores transverse tooth thickness degree orientation average and distributes two-layerly, by required radian, steel disc is bent, and sandblast, cleaning treatment; In cold stamping die, first add load weighted working lining internal layer powder, add again first floor arc steel plate, add afterwards working lining middle level powder, after add second layer arc steel plate, then add the outer powder of working lining, by cold press, suppress the brill tooth working lining containing enhancement Layer, thickness is about 13.1mm, and length is 35mm; This working lining is packed in graphite jig, then pour respectively transition zone and weld layer powder into, be loaded on graphite mo(u)ld seaming chuck, put into vacuum resistance hot press and carry out sintering, sintering temperature is 780 ℃, and total head pressure is 30MPa, and temperature retention time is 8min, can burn out stainless steel substrates and strengthen high carcass geology brill tooth, bore the whole anti-breaking strength of tooth and bore tooth raising 40-110% compared to routine.
Claims (13)
1. one kind high carcass bores tooth, comprise working lining, transition zone and weld layer, working lining is diamantiferous metal-base composites, transition zone is working lining and the material that is connected of weld layer, transition zone is not containing diamond, and weld layer is the connecting portion that bores tooth and steel body, and weld layer is not containing diamond, it is characterized in that: in described brill tooth working lining, thickness direction adds enhancement Layer enhancement Layer and brill tooth working lining strong bonded.
2. high carcass according to claim 1 bores tooth, it is characterized in that: the height of described brill tooth is 15-35mm, and working lining height is 12-30mm.
3. high carcass according to claim 1 bores tooth, it is characterized in that: described enhancement Layer is realized by sintering with brill tooth working lining strong bonded.
4. high carcass according to claim 1 bores tooth, it is characterized in that: described enhancement Layer is 1-4 layer.
5. high carcass according to claim 1 bores tooth, it is characterized in that: described enhancement Layer material is glass fiber, carbon fiber, stainless steel, alloy steel.
6. high carcass according to claim 1 bores tooth, it is characterized in that: described enhancement Layer material is sheet, netted, thread array arrangement.
7. high carcass according to claim 1 bores tooth, it is characterized in that: the thickness of described enhancement Layer material is 0.5-1.5mm.
8. high carcass according to claim 1 bores tooth, it is characterized in that: described enhancement Layer arc length is along the circumferential direction greater than bores 75% of sector length, along the length of boring tooth height direction, be greater than and bore 80% of tooth working lining, and enhancement Layer penetrates the binding site of working lining and transition zone, the degree of depth that makes enhancement Layer extend into transition zone is greater than 0.5mm.
9. high carcass bores a preparation method for tooth, comprises the following steps:
1) remove reinforcement material surface dirt, oxide layer, according to boring radially radian of tooth, reinforcement material is bent to required radian, as interlayer, use;
2) employing is colded pressing to suppress and is bored tooth carcass thin slice, and thin slice all comprises working lining, transition zone and weld layer;
3) enhancement Layer is sandwiched respectively in the middle of thin slice, pack mould into, by hot pressing, complete the making that high carcass bores tooth.
10. the preparation method that high carcass according to claim 9 bores tooth, is characterized in that: described colds pressing, the idiosome density of colding pressing reaches 50-70%.
The preparation method that 11. high carcasses according to claim 9 bore tooth, it is characterized in that: described sandwiches enhancement Layer respectively in the middle of thin slice, pack mould into, that thin slice and enhancement Layer are fitted together, assembly is put into mould, then on the top of assembly, pour respectively transition zone powder and weld layer powder into.
The preparation method that 12. high carcasses according to claim 9 bore tooth, is characterized in that: described hot pressing, and for carrying out sintering by vacuum resistance hot press, sintering temperature is 750-900 ℃, and total head pressure is 20-30MPa, and temperature retention time is 3-10min.
The preparation method that 13. high carcasses according to claim 12 bore tooth, is characterized in that: sintering temperature is 780-880 ℃.
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| CN201410210867.XA CN103982139B (en) | 2014-05-19 | 2014-05-19 | A kind of high carcass bores tooth and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107127347A (en) * | 2017-05-18 | 2017-09-05 | 中国有色桂林矿产地质研究院有限公司 | The method that sinter molding makes brill tooth is assembled using bar base |
| CN107165582A (en) * | 2017-07-05 | 2017-09-15 | 中南大学 | A kind of diamond helical positioning distribution superthin layer composite drill bit and its manufacture craft |
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| CN2078789U (en) * | 1990-12-03 | 1991-06-12 | 地质矿产部探矿工程研究所 | Diamond bit for petroleum drilling |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107127347A (en) * | 2017-05-18 | 2017-09-05 | 中国有色桂林矿产地质研究院有限公司 | The method that sinter molding makes brill tooth is assembled using bar base |
| CN107165582A (en) * | 2017-07-05 | 2017-09-15 | 中南大学 | A kind of diamond helical positioning distribution superthin layer composite drill bit and its manufacture craft |
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| Publication number | Publication date |
|---|---|
| CN103982139B (en) | 2016-06-08 |
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