CN216446854U - Reinforced hot-pressing column-shaped diamond complex impregnated bit - Google Patents
Reinforced hot-pressing column-shaped diamond complex impregnated bit Download PDFInfo
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Abstract
The utility model discloses a reinforced hot-pressing columnar diamond complex impregnated drill bit. The drill bit comprises a drill bit steel body, a plurality of supporting bodies arranged at the end part of the drill bit steel body, gauge protection welding layers for welding the drill bit steel body and the supporting bodies, and water gaps, wherein the water gaps are positioned between the adjacent supporting bodies, the gauge protection welding layers are positioned between the drill bit steel body and the supporting bodies,a plurality of diamond complexes are arranged in the support body, the diamond complexes are arranged in two or three rings and distributed in the support body, and the diamond complexes account for 55-80% of the area of the working bottom lip of the drill bit; the composite diamond in the diamond composite body adopts SMD40Diamond, the composite diamond in the support adopts SMD30Diamond. The drill bit has a unique structure, and can drill in a hard, compact and weak-abrasiveness rock stratum under the condition of a normal drilling regulation, the specific drilling pressure is large, the diamond edge is good, and the characteristics of high drilling efficiency and long service life of the drill bit can be achieved.
Description
Technical Field
The utility model belongs to the technical field of geological exploration, petroleum drilling or engineering investigation, and particularly relates to a reinforced hot-pressing columnar diamond complex impregnated bit. And is also used for preventing and controlling geological disasters, in particular to a diamond drill bit for drilling hard and compact rocks.
Background
The prior art still mainly adopts a hot pressing method and an electroplating method to manufacture the diamond drill bit. The common diamond bit manufactured by the hot pressing method has higher hardness and wear resistance, and can meet the drilling requirements of most rock strata. However, the drilling time for drilling hard, compact and weak abrasive rock strata is very low, and is generally 0.3-0.4 m/h; the service life of the drill bit is short and is only about 5-8 m. The drill bit manufactured by the electroplating method has better adaptability and higher drilling speed, but also has low aging and short service life when drilling into hard to hard and compact rock formations.
As geological prospecting develops towards the deep part of a stratum, the rock stratum is harder and harder, the probability of the occurrence of a hard, compact and weak abrasive rock stratum is higher and higher, almost all metal ores can meet the rock stratum during drilling, the geological exploration process is seriously influenced, the drilling cost is increased, and the method becomes a difficult problem which troubles the prospecting engineering technicians for a long time.
In order to solve the problem of difficult drilling of the rock stratum, the prior art adopts a soft matrix with low wear resistance, the inner part of a working layer is of a homogeneous structure, and the diamond in the drill bit is expected to have high edge emergence and good edge emergence, so that the aim of improving the drilling speed is fulfilled. However, the fact shows that the soft and low-wear-resistance carcass cannot adapt to the rock stratum drilling, the main reasons for this carcass are that the carcass cannot adapt to the high-weight-on-bit condition, the soft carcass has plastic creep deformation which cannot effectively make the diamond go out of the edge, and the diamond cannot effectively cut into the rock, thus failing to achieve the intended purpose.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the defects in the prior art and provide a reinforced hot-pressing columnar diamond composite impregnated drill bit.
The technical scheme adopted by the utility model is as follows: a hot-pressed reinforced columnar diamond composite impregnated drill bit comprises a drill bit steel body, a plurality of supporting bodies arranged at the end part of the drill bit steel body, a gauge protection welding layer and a water gap, wherein the gauge protection welding layer is used for welding the drill bit steel body and the supporting bodies, the water gap is positioned between the adjacent supporting bodies, the gauge protection welding layer is positioned between the drill bit steel body and the supporting bodies, a plurality of diamond composites are arranged in the supporting bodies, the diamond composites are arranged in two or three rings and distributed in the supporting bodies, and the diamond composites account for 55-80% of the working bottom lip area of the drill bit; the hardness of the matrix of the diamond composite is HRc 38-48, and the wear resistance is ML (0.32-0.45) multiplied by 10-5(ii) a The hardness of the tire body of the support body is HRc 13-HRc 16, and the wear resistance is ML (0.62-0.76) multiplied by 10-5The bending strength reaches 750MPa degrees; the composite diamond in the diamond composite body adopts SMD40Diamond, the composite diamond in the support adopts SMD30Diamond;
the diamond composite body comprises the following components in percentage by mass: 40-45% of WC, 12-18% of YG12, 8-10% of Ni, 3-6% of Mn and 25-32% of 660-Cu;
the carcass of the support body comprises the following components in percentage by mass: 45-54% of Fe, 10-15% of Ni, 4-6% of Mn and 30-35% of 660-Cu;
the SMD40The percentage concentration of the diamond is 86-100%, the 30/40-mesh granularity accounts for 55-70%, and the 50/60-mesh granularity accounts for 30-45%; the SMD30The percentage concentration of the diamond is 45-55%, and the granularity is 40/50 meshes.
The purpose of the composite diamond in the support body is to improve the uniform abrasion degree of the drill bit and improve the drilling effect of the drill bit.
The diamond complex is in a square column shape or a cylindrical shape, the side length or the diameter of the diamond complex is 4.5-7.0 mm, and the length of the diamond complex is 10-14 mm.
The diamond drill bit is formed by combining a diamond complex for breaking rock and a support body; the diamond composite part has high hardness and strong wear resistance; the hardness of the support body part is low, the diamond complex can be effectively consolidated and supported to work, and the diamond complex is firmly combined with the drill bit steel body; the diamond complexes are arranged in two or three rings and regularly distributed in the support body, and the diamond complexes account for 55-80% of the working bottom lip area of the drill bit. The drill bit has a unique structure, and can drill in a hard, compact and weak-abrasiveness rock stratum under the condition of a normal drilling regulation, the drilling specific pressure is large, the diamond edge is good, and the characteristics of high drilling efficiency and long service life of the drill bit can be achieved.
The utility model adopts a reverse thinking method, and for a drill bit for drilling a hard, compact and weak-abrasiveness rock stratum, a main body part of the drill bit, namely a diamond compound body part, is prepared by using a hard and high-abrasiveness matrix instead of a soft and low-abrasiveness matrix, and is used for crushing a rock main body. The diamond composite body occupies 55-80% of the area of the bottom lip in the working layer of the drill bit, and is 20-45% less in stress area than the working layer of a common diamond drill bit, so that the unit area drilling pressure of the drill bit is improved under the same drilling pressure, the multi-cutter multi-blade effect and the broken hole effect can be realized, rock powder can be discharged, the drill bit can be cooled, and the drilling problem of hard rock can be effectively overcome.
The support body is used for embedding and supporting the diamond complex, so that the integral bonding strength of the drill bit is improved; the matrix of the support body is compounded with diamond, the hardness of the matrix is lower, the wear resistance is also lower, the diamond edge is better, and the diamond-. The purpose of the support body is designed, and the problems that the diamond complex is small in specification, small in bending strength, not enough in bonding strength with a drill steel body and the like are solved.
The support body is compounded with diamond, and aims to improve the wear balance degree of the drill bit, improve the drilling effect of the drill bit and prolong the service life of the drill bit.
The utility model has the beneficial effects that:
(1) the drill bit has novel and unique structure, the diamond complex of the drill bit has high hardness, strong wear resistance, good quality and high concentration of diamond, and small contact area with rock, and the structure and the characteristics are very favorable for breaking the rock and obtaining good drilling effect.
(2) The drill bit support body has low hardness and low wear resistance, and the bit pressure consumption during drilling is small, so that the drilling pressure of the main working body is effectively improved, and the drilling efficiency of the drill bit is improved; the support body is used for consolidating the diamond complex and firmly welding with the drill steel body. The structural characteristics of the drill bit and the resulting drilling advantages ensure that the drill bit achieves the advantages of drilling hard to hard, compact rock.
(3) The matrix material adopted by the diamond composite body of the drill bit has low copper alloy element content and high framework material content, the loss of copper alloy can not occur under the action of reinforced hot pressing by matching with metals such as iron, nickel, manganese and the like, the mechanical property of the matrix of the drill bit is stable, the firmness of embedding diamond is improved, and the diamond can be timely and effectively edged, so that the basis for realizing the efficient and long-life drilling of the drill bit is realized.
(4) The drill bit matrix manufactured by the common hot pressing method mainly depends on the bonding effect of the copper alloy to realize the integral strength of the matrix, the bonding force of the copper alloy is limited, the hot pressing temperature and pressure are limited, and the drill bit lacks the advantages of performance and effect; the structure of the drill bit and the advantages of the mechanical properties of the matrix are obvious, the contact state of the matrix of the drill bit and the rock is different, the friction coefficient between the drill bit and the rock is improved, the friction and wear state of the matrix of the common drill bit and the rock is changed, the mechanism of breaking the rock by the diamond drill bit and the mode of breaking the rock by the diamond are changed, the effective and timely exposure of the diamond is facilitated, and the drilling effect of the drill bit is improved.
(5) The diamond complex with high densification is manufactured, so that the effective combination of the matrix metal and the surface of the diamond can be improved, the strong embedding of the diamond is realized, and the matrix material can also keep the self-sharpening effect of the diamond; the support body of the drill bit contains diamond, the diamond is optimally matched with the diamond complex, the stable drilling and the balanced abrasion of the drill bit are solved, the benign complementation is realized, the drilling speed is effectively improved, and the advantages are the conditions and the advantages which are not possessed by the common diamond drill bit.
(6) And the specification of the diamond composite body is as follows: the side length (or diameter) is 4.5-7.0 mm, and the length is 10-14 mm; the side length (or diameter) can be flexibly selected and matched in a fan-shaped working body according to the type and specification of the drill bit, the size can be combined, and the arrangement from one ring to three rings can be realized to generate different effects; a working layer 14mm high may improve the life of the drill bit.
(7) The test result shows that when the diamond composite drill bit disclosed by the utility model is used for drilling hard to hard compact rocks, compared with a common drill bit, the drilling speed can be improved by about 2.4 times, the service life is improved by about 2 times, and the diamond composite drill bit is used for drilling in hard rocks with drillability of 9-10 grades, the drilling hour efficiency of the drill bit of the utility model reaches 1.16m/h, and the service life of the drill bit averagely reaches 41.8 m/per drill bit; the drilling cost of the drill bit is reduced by about 3.2 yuan per meter, thus fundamentally solving the problem of difficult drilling of the rock stratum for a long time.
(8) Compared with the common drill bit, the drill bit of the utility model has the following advantages that the laboratory and field drilling tests show that: the drilling efficiency can be improved by 32-35%, the service life is prolonged by 18-20%, and the drill bit can adapt to the drilling of five types of rocks with the drillability of 6-10 grades; the effect is more obvious particularly for drilling hard to hard and compact rock which is difficult to drill.
(9) In conclusion, the drill bit of the utility model designs a scientific and practical structure and adopts an advanced forming process technology of reinforced hot pressing; the manufacturing precision of the drill bit is high, the performance is stable, and the overall effect of the drill bit is excellent.
Drawings
FIG. 1 is a view of the bottom lip face of the drill bit of the present invention;
FIG. 2 is a cross-sectional view taken along the direction D-D of FIG. 1, i.e., a longitudinal cross-sectional view of the drill bit;
FIG. 3 is a diagram of a two-ring structure of a diamond cylinder drill bit support according to the present invention;
FIG. 4(1) is a diagram of two rings of diamond cambered trapezoidal pillar drill supports according to the present invention;
FIG. 4(2) is a diagram of a diamond-curved trapezoidal pillar composite according to the present invention;
FIG. 5 is a three-ring structure diagram of the diamond cylinder drill bit support of the present invention.
In the figure, 1-support body, 2-diamond compound body, 3-diamond, 4-nozzle, 5-gauge welding layer, 6-gauge polycrystalline body of drill bit and 7-steel body of drill bit.
Detailed Description
The utility model will be further described in detail with reference to the following drawings and specific examples, which are not intended to limit the utility model, but are for clear understanding.
As shown in fig. 1-5, a reinforced hot-pressing columnar diamond composite impregnated drill bit comprises a drill bit steel body 7, a plurality of support bodies 1 arranged at the end part of the drill bit steel body 7, a gauge protection welding layer 5 for welding the drill bit steel body 7 and the support bodies 1, and a water gap 4, wherein the water gap 4 is positioned between the adjacent support bodies 1, the gauge protection welding layer 5 is positioned between the drill bit steel body 7 and the support bodies 1, a plurality of diamond composites 2 are arranged in the support bodies 1, the diamond composites 2 are arranged in two or three rings and distributed in the support bodies 1, and the diamond composites 2 occupy 55-80% of the working bottom lip area of the drill bit; the hardness of the matrix of the diamond complex 2 is HRc 38-48, and the wear resistance is ML 0.32-0.45 multiplied by 10-5(ii) a The hardness of the tire body of the support body 1 is HRc 13-HRc 16, and the wear resistance is ML 0.62-0.76 multiplied by 10-5(ii) a The composite diamond in the diamond composite body 2 adopts SMD40Diamond, the composite diamond in the support body 1 adopts SMD30Diamond;
the matrix of the diamond complex 2 comprises the following components in percentage by mass: 40-45% of WC, 12-18% of YG12, 8-10% of Ni, 3-6% of Mn and 25-32% of 660-Cu;
the carcass of the support body 1 comprises the following components in percentage by mass: 45-54% of Fe, 10-15% of Ni, 4-6% of Mn and 30-35% of 660-Cu;
the SMD40The percentage concentration of the diamond is 86-100%, the 30/40-mesh granularity accounts for 55-70%, and the 50/60-mesh granularity accounts for 30-45%; the SMD30The percentage concentration of the diamond is 45-55%, and the granularity is 40/50 meshes.
The diamond complex 2 is in a square column shape or a cylindrical shape, the side length or the diameter of the diamond complex is 4.5-7.0 mm, and the length of the diamond complex is 10-14 mm.
The manufacturing method of the utility model comprises the following steps:
step 1: prefabricating a diamond composite body 2 by adopting a reinforced hot pressing method, wherein the matrix material of the diamond composite body 2 comprises the following components in percentage by weight: 40-45% of WC, 12-18% of YG12, 8-10% of Ni, 3-6% of Mn and 25-32% of 660-Cu; the composite diamond in the diamond composite body 2 adopts SMD40Diamond, the SMD40The percentage concentration of the diamond is 86-100%, the 30/40-mesh granularity accounts for 55-70%, and the 50/60-mesh granularity accounts for 30-45%; the matrix material and the diamond are respectively weighed in proportion, ball-milled and uniformly mixed, then are placed into a die at one time, are subjected to enhanced hot-pressing sintering, and are cooled, demoulded and subjected to surface descaling to obtain a diamond complex 2;
step 2: the carcass material of the support 1 is in the following proportions: 45-54% of Fe, 10-15% of Ni, 4-6% of Mn and 30-35% of 660-Cu; the composite diamond in the support body 1 adopts SMD30Diamond, the SMD30The percentage concentration of the diamond is 45-55%, and the granularity is 40/50 meshes; will contain SMD30The metal powder of the diamond is put into a graphite mould, the diamond complex 2 is arranged in a two-ring or three-ring shape and is distributed and positioned in the metal powder of the support body 1, and the metal powder of the support body 1 fuses the diamond complex 2 and the drill steel body 7 into an integral drill through hot-pressing sintering.
In the step 1, the parameters of the intensified hot pressing process are as follows: the pressure is 18-22 MPa, the temperature is 980-995 ℃, the heat preservation and pressure maintaining are carried out for 7.5-9.0 min, and the tapping temperature is 750-780 ℃.
In the step 1, the prefabricated diamond complex 2 is in a square column shape or a cylindrical shape, the side length or the diameter is 4.5-7.0 mm, and the length is 10-14 mm; gold (Au)The hardness of the diamond composite 2 is HRc 38-48, and the wear resistance is ML 0.32-0.45 x 10-5。
In the step 2, the hot pressing process parameters are as follows: the temperature is 935 to 950 ℃, the pressure is 15 to 16MPa, the temperature and the pressure are kept for 4.5 to 5.5min, and the tapping temperature is 780-800 ℃.
The drill bit consists of a diamond complex and a support body, wherein the diamond complex is in a square column shape or a cylindrical shape and is prefabricated by adopting a reinforced hot pressing process; the diamond complexes are arranged in two or three rings and are regularly distributed in the support body, and the diamond complexes account for 55 to 80 percent of the area of the working bottom lip of the drill bit; the diamond complex has high hardness and strong wear resistance, and the diamond grade and the diamond concentration are high, so that the diamond complex plays a role in crushing rocks by a main body; the support body has lower hardness and lower wear resistance, plays a role in embedding, fixing a diamond complex and assisting in crushing rock, and is compounded with diamond; hot-pressing and sintering the mixture into a diamond drill bit through a medium-frequency electric furnace or a resistance furnace; the prepared drill bit has the characteristics of high drilling efficiency and long service life when drilling hard to hard and compact rock strata.
A diamond compact and a support. The diamond complex is prefabricated by adopting a strengthening hot pressing method, different working performances can be obtained by adjusting the material combination and diamond parameters of the diamond complex, and the requirement of drilling hard to hard-compact rocks is met; the diamond complexes are regularly arranged and distributed in the drill bit support body, the material of the support body consists of iron, nickel, manganese and copper alloy, and the support body has lower hardness and weaker wear resistance; the main function is to firmly wrap the diamond complex under the hot-pressing condition and realize strong combination with the drill steel body, and finally the diamond drill bit which can meet the drilling requirement is manufactured.
(1) Diamond composite
The utility model starts from the mechanical property of hard, compact and weak abrasive rock, researches the rock crushing mechanism, realizes that the large and reasonable bit pressure is needed to be adopted for drilling the rock, and leads the diamond to effectively go out of the edge and cut into the rock; due to the structural characteristics of the drill string, the working layer area and the scientific structural form of the drill bit can only be optimally designed, so that the bit pressure value of the drill bit in unit area can reach that the diamond can effectively cut into the rock, and the efficient drilling of the drill bit can be ensured. After calculation and optimization, the area of the diamond complex of the drill bit is the best 55-80% of the area of the working layer of the drill bit, and the requirement that the drill bit can obtain a good drilling effect in the rock with the drillability of 8-12 grades can be met.
Through analysis and test, the hardness of the diamond composite body is reasonable in the range of HRC 38-HRC 48, and the wear resistance of the diamond composite body is ML (0.32-0.45) multiplied by 10-5The range can ensure good edge cutting and cutting effects of the diamond. The performance of the diamond composite body is adjusted mainly by adjusting the components and the content ratio of the diamond composite body and diamond parameters (granularity and concentration); meanwhile, the hot pressing process parameters can be adjusted in a matched manner.
Because the drill bits used for geological exploration have a plurality of specifications, different requirements are certainly required for the specifications of the diamond complexes, in order to meet the requirements of the drill bits with different specifications, the diamond complexes with a plurality of specifications are designed and combined for use by the complexes with different specifications, and the diamond complex is more flexible and convenient; meanwhile, the joint strength of the composite body in the support body can be improved, the effect of multiple cutters and multiple blades is realized, and the capability of crushing rocks is improved. The specifications of the diamond composite body are designed as follows according to the type and the specification of the drill bit: square column, side length: 4.5, 5.0, 5.5, 6.0, 6.5 and 7.0, the heights of which are all 10-14 mm; cylinder, diameter: phi 4.5, phi 5.0, phi 5.5, phi 6.0, phi 6.5, phi 7.0; the height of the steel plate is 10-14 mm.
The diamond composite body is prefabricated by adopting a reinforced hot pressing method. The mold is made of high-strength and high-density graphite. According to the design, the matrix material and the diamond are respectively weighed and then put into a ball milling cylinder for ball milling and mixing, after being uniformly mixed, the weight of each composite is respectively weighed and then put into a graphite mold at one time, then the composite is placed into an automatic sintering furnace for hot-pressing sintering, and the diamond composite is obtained after cooling, demolding and removing the surface oxide skin.
The diamond complex adopts the parameters of the intensified hot pressing technology: the pressure is 18-22 MPa, the temperature is 980-995 ℃, the heat preservation and pressure maintaining are carried out for 7.5-9.0 min, and the tapping temperature is 750-780 ℃; when the temperature is increased to 860 ℃, the temperature and pressure are kept for 30S.
(2) And a support body
The support body is an important structural part for embedding the diamond complex and connecting the drill steel body in the drill of the utility model, and the support body can embody the function and the value of the drill when the drill is hot-pressed and formed. The basic components of the material are as follows: 45-52% of iron, 10-15% of nickel, 3-5% of manganese, 30-35% of copper alloy, lower hardness HRC 13-HRC 16 of support body, lower ML (0.63-0.75) x 10 of wear resistance-5. The hardness and the wear resistance of the support body can be properly adjusted by adjusting the content ratio of the basic components so as to adapt to the requirement of rock change.
In the support material, diamond must be compounded: granularity of 40/50 meshes, grade SMD30The percentage concentration is 45-55%; the diamond and the matrix material are uniformly mixed by a ball mill for standby.
(3) Drill bit assembly and hot press forming
The mold of the hot-pressing drill bit is manufactured by machining high-strength and high-density graphite materials. The diamond complex is fixed in the mould according to the designed scheme selectively and regularly, diameter-protecting material is added and fixed firmly by binder, then metal powder of support body is added, so that the mould assembly of sintered drill bit is completed.
And (4) feeding the assembled die into an intelligent intermediate-frequency hot-pressing electric furnace, feeding water, and starting the intermediate-frequency electric furnace for hot-pressing sintering. Hot pressing technological parameters: the temperature is 935-950 ℃, the pressure is 15-16 MPa, the temperature and the pressure are kept for 4.5-5.5 min, the tapping temperature is 780-800 ℃, and the temperature is cooled to the room temperature after tapping, thus completing the manufacture of the hot-pressed sintered diamond composite drill bit.
Example 1:
the specification of the drill bit with the diameter of 77/49mm is taken as an example for further explanation.
(1) The drill bit is designed into 8 fan-shaped working bodies, namely the drill bit is provided with 8 corresponding water gaps;
(2) the diameter of the cylindrical diamond complex is 6.5mm, and the height of the cylindrical diamond complex is 12 mm;
(3) and a matrix material of the cylindrical diamond complex: 15% of YG12, 45% of WC, 8% of Ni, 4% of Mn and 28% of 660-Cu;
(4) and the diamond parameters in the cylindrical diamond complex are as follows: 68% in 35/40 meshes, 32% in 50/60 meshes and SMD in all40A grade diamond;
(5) and the technological parameters of the reinforced hot-pressing cylindrical diamond complex are as follows: the pressure is 20MPa, the temperature is 990 ℃, the temperature and the pressure are kept for 7.5min, and the tapping temperature is 780 ℃;
(6) and a support body matrix material: 46% of Fe, 15% of Ni, 5% of Mn and 34% of 660-Cu;
(7) and compounding diamond in the matrix material of the support body: granularity 40/50 mesh, grade SMD30The percentage concentration is 50 percent, and the diamond and the matrix material are uniformly mixed by a ball mill for standby;
(8) assembling a drill bit sintering mold, namely fixing the columnar diamond complex in the mold according to a designed scheme selectively and regularly, adding a gauge protection material and firmly adhering the same by using a binder, then adding metal powder of a matrix of a diamond-containing support body, and pressing a drill bit steel body to complete the mold assembly of the sintering drill bit;
(9) the technological parameters of the hot-pressing columnar diamond composite drill bit are as follows: the temperature is 945 ℃, the pressure is 16MPa, the temperature and the pressure are kept for 5.0min, and the tapping temperature is 800 ℃;
(10) after the drill bit of the columnar diamond complex is taken out of the furnace, the drill bit is slowly cooled to room temperature under the condition of heat preservation, and then machining and decoration are carried out, namely the drill bit finished product is obtained.
Example 2:
the specification of the drill bit with the diameter of 95/68mm is taken as an example for further explanation.
(1) The drill bit is designed into 10 fan-shaped working bodies, namely the drill bit is provided with 10 corresponding water gaps;
(2) the diameter of the cambered surface trapezoidal columnar diamond complex is 6.5 multiplied by 5.0mm, and the height of the cambered surface trapezoidal columnar diamond complex is 13 mm;
(3) and the tire body material of the cambered surface trapezoidal columnar diamond complex: 15% of YG12, 42% of WC, 9% of Ni, 4% of Mn and 30% of 660-Cu;
(4) and the diamond parameters in the cylindrical diamond complex are as follows: 70% in 35/40 meshes, 30% in 50/60 meshes and SMD in all40A grade diamond;
(5) and the technological parameters of the enhanced hot-pressing cambered surface trapezoidal columnar diamond complex are as follows: the pressure is 19MPa, the temperature is 995 ℃, the heat preservation and the pressure maintaining are carried out for 8.0min, and the tapping temperature is 750 ℃;
(6) and a support body matrix material: 47% of Fe, 13% of Ni, 5% of Mn and 35% of 660-Cu;
(7) and compounding diamond in the matrix material of the support body: granularity 40/50 mesh, grade SMD30The percentage concentration is 55 percent, and the diamond and the matrix material are uniformly mixed by a ball mill for standby;
(8) assembling a drill bit sintering mold, namely fixing the columnar diamond complex in the mold according to a designed scheme selectively and regularly, adding a gauge protection material and firmly adhering the same by using a binder, then adding metal powder of a matrix of a diamond-containing support body, and pressing a drill bit steel body to complete the mold assembly of the sintering drill bit;
(9) the technological parameters of the hot-pressing cambered surface trapezoidal columnar diamond composite drill bit are as follows: keeping the temperature at 950 ℃ and the pressure at 16MPa for 5.5min, and tapping at 780 ℃;
(10) after the drill bit of the columnar diamond complex is taken out of the furnace, the drill bit is slowly cooled to room temperature under the heat preservation condition, taken out of the furnace, machined and decorated, and the finished product of the drill bit is obtained.
Those not described in detail in this specification are within the skill of the art.
Claims (2)
1. The utility model provides a hot pressing strengthening column diamond complex impregnated bit, includes drill bit steel body (7), sets up gauge protection welded layer (5) and mouth of a river (4) at a plurality of supporter (1), the welding drill bit steel body (7) of drill bit steel body (7) tip and supporter (1), mouth of a river (4) are located between adjacent supporter (1), gauge protection welded layer (5) are located between drill bit steel body (7) and supporter (1), its characterized in that: a plurality of diamond complexes (2) are arranged in the support body (1), and the diamond complexes (2)The diamond composite bodies are arranged in two rings or three rings and are distributed in the support body (1), and the diamond composite bodies (2) account for 55-80% of the area of the working bottom lip of the drill bit; the hardness of the matrix of the diamond complex (2) is HRc 38-HRc 48, and the wear resistance ML is 0.32 multiplied by 10-5～0.45×10-5(ii) a The hardness of the carcass of the support body (1) is HRc 13-HRc 16, and the wear resistance ML is 0.62 multiplied by 10-5～0.76×10-5(ii) a The composite diamond in the diamond composite body (2) adopts SMD40The diamond is compounded in the support body (1) by adopting SMD30Diamond.
2. The enhanced hot-pressing cylindrical diamond composite impregnated drill bit according to claim 1, wherein: the diamond complex (2) is in a square column shape or a cylindrical shape, the side length or the diameter of the diamond complex is 4.5-7.0 mm, and the length of the diamond complex is 10-14 mm.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115401197A (en) * | 2022-08-17 | 2022-11-29 | 中铁第四勘察设计院集团有限公司 | Diamond-impregnated bit manufacturing die, manufacturing method and diamond-impregnated bit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115401197A (en) * | 2022-08-17 | 2022-11-29 | 中铁第四勘察设计院集团有限公司 | Diamond-impregnated bit manufacturing die, manufacturing method and diamond-impregnated bit |
| CN115401197B (en) * | 2022-08-17 | 2024-01-23 | 中铁第四勘察设计院集团有限公司 | Diamond-impregnated drill bit manufacturing die, manufacturing method and diamond-impregnated drill bit |
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