CN114351023B - Zirconium hydride reinforced diamond-impregnated bit iron-based matrix material and method for preparing bit material by using same - Google Patents
Zirconium hydride reinforced diamond-impregnated bit iron-based matrix material and method for preparing bit material by using same Download PDFInfo
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Abstract
The invention discloses a zirconium hydride reinforced diamond-impregnated bit iron-based matrix material which is prepared from the following raw materials in parts by weight: 45-60 parts of iron-based framework material, 40-55 parts of metal binding material and 0.2-0.6 part of zirconium hydride, wherein the framework material and the binding material are pre-alloyed powder; the invention also discloses a method for preparing the drill bit material by using the zirconium hydride reinforced diamond-impregnated iron-based matrix material. The invention takes the iron-copper prealloying powder as a framework material, takes the iron-copper-nickel-tin prealloying powder and/or the iron-copper-zinc-titanium prealloying powder as a metal bonding material, promotes the densification of the tire body by utilizing the activation of zirconium hydride, improves the wear resistance and the mechanical property of the tire body, has fine and uniform structure of the sintered tire body, avoids component segregation, simultaneously has better bending strength and wear resistance, and is suitable for processing objects with hard and strong grinding performance.
Description
Technical Field
The invention belongs to the technical field of powder metallurgy, and particularly relates to a zirconium hydride reinforced diamond-impregnated bit iron-based matrix material and a method for preparing a bit material by using the same.
Background
With the rapid development of socio-economy, the demand of various underground mineral resources is increasing day by day. At present, most of shallow mineral resources are developed and utilized, and exploration for deeper strata is needed. However, deep stratum conditions are complex, exploration and development difficulties are increased, and requirements for drilling technology are increasing day by day. The diamond-impregnated bit is an important geological bit and is widely applied to drilling of hard formations. For diamond-impregnated bits, the matrix plays two main roles: firstly, the diamond is dispersedly held by the matrix through mechanical embedding, metallurgical bonding and other modes, and meanwhile, the wear rate matched with a working object is provided to ensure the cutting rate of the diamond during working, so that the working efficiency is ensured; secondly, the heat dissipation effect, the temperature in the working area can be sharply increased due to grinding in the drilling process, and the heat needs to be dispersed in time to avoid damaging the material. The properties of the matrix material, such as the embedding capacity, the cutting capacity, the heat dissipation capacity and the like, directly determine the processing efficiency and the service life of the diamond drill bit.
The metal matrix mainly comprises several types of phases such as high-melting-point solid phase binders (Co, fe, ni, cu and the like), low-melting-point liquid phase fillers (Sn, zn, cu-Sn alloys and the like), high-melting-point hard additives (WC and the like), micro-adjustment additives (rare earth, fe3P and the like) and the like. The high-melting-point solid phase adhesive is used as a framework supporting material, mainly plays roles of shaping, consolidation and wear resistance, is a main functional phase for consolidating and holding diamond abrasive particles and ensuring the effect of diamond, needs to be sintered, densified and alloyed at a higher temperature, is a basic guarantee for obtaining a high-performance sintered matrix, and is a key factor for determining the performance of a drill bit. The low-melting-point liquid phase filler is melted earlier in the sintering process, and a series of physicochemical changes such as densification and alloying can be generated in the sintering process under the condition of lower temperature, so that the mixed sintered body of the diamond and the metal binder with expected functions can be obtained. At present, the WC-Co matrix-based diamond bit is most commonly used, and although Co has good alloying degree and mechanical property and has good embedding force on diamond, the Co-based diamond bit has good wear resistance, self-sharpening property and high-temperature performance, but the cobalt is expensive and has insufficient resources; meanwhile, the performance of the WC-Co based drill bit is difficult to regulate and control, the requirements for drilling various rock stratums cannot be met, and the drilling of hard and weak-abrasiveness rocks is not ideal. Fe and Co are in the same subgroup, the structure and many performances of Fe are similar to those of cobalt, the Fe is rich in resource and low in price, and a plurality of geological drill workers in China are promoted to develop research on sintering of diamond-impregnated bits by using Fe powder instead of WC-Co powder.
The Fe-based matrix has good wettability and proper mechanical property, low thermal expansion coefficient and small crack tendency; however, the Fe-based matrix has poor formability, high sintering temperature, narrow controllable process range and poorer wear resistance and bending strength compared with the WC-based matrix, and diamond is easy to generate thermal damage to generate graphitization under the condition of high temperature, thereby weakening the mosaic effect of the matrix on the diamond, and influencing the sharpness, drilling efficiency and service life of a drill bit. To improve the performance of the Fe-based matrix, the formula of the Fe-based matrix can be optimized. According to different matrix formulas, a research is carried out to manufacture the Fe-based diamond drill bit suitable for a stratum with stronger abrasiveness by adding a small amount of P and adding P-Fe alloy powder; it is also studied to enhance the compactness of the matrix and improve the strength of the matrix by doping a proper amount of rare earth elements. For a Fe-based matrix, the technical difficulty of the current research is how to improve the sintering activity of Fe-based powder, and simultaneously, the problems of high-temperature oxidation and uneven components of the Fe-based matrix are solved, so that diamond can be effectively wetted, and the graphitization of the surface of the diamond in the sintering process is reduced and avoided.
With the rapid development of nanotechnology, the quantum size effect, surface effect, macroscopic quantum tunneling effect, and the like, which are exhibited by nanomaterials, have become an important research direction for dispersion-strengthened metal or alloy materials. The nano particles can be uniformly dispersed in a metal or alloy matrix to serve as second phase particles, and dislocation movement and grain boundary slippage in the material deformation process are limited, so that the performance of the material is improved. At present, researches on the improvement of diamond matrix materials by nano-hydrides are rarely reported.
Disclosure of Invention
Based on the defects of the prior art, the invention aims to provide the zirconium hydride reinforced diamond-impregnated bit iron-based matrix material, and the compactness, the wear resistance and the mechanical property of the matrix are improved through the activation of the zirconium hydride. The invention also discloses a method for preparing the drill bit by using the zirconium hydride reinforced diamond-impregnated drill bit iron-based matrix material.
In order to achieve the purpose, the invention adopts the technical scheme that:
the zirconium hydride reinforced diamond-impregnated bit iron-based matrix material comprises the following raw materials in parts by weight: 45-60 parts of iron-based framework material, 40-55 parts of metal binding material and 0.2-0.6 part of zirconium hydride, wherein the iron-based framework material and the metal binding material are pre-alloyed powder.
Preferably, the iron-based framework material is an iron-copper prealloyed powder.
Further, the mass percentage of copper in the iron-copper prealloying powder is 15-30%.
Preferably, the metal bond material is an iron-copper-nickel-tin prealloyed powder and/or an iron-copper-zinc-titanium prealloyed powder.
Preferably, the metal bonding material is formed by mixing iron-copper-nickel-tin prealloying powder and iron-copper-zinc-titanium prealloying powder according to a mass ratio of 1.
Further, the iron-copper-nickel-tin prealloying powder comprises the following components in percentage by mass: copper: 20-40%, nickel: 3 to 6 percent, tin: 5 to 10%, silicon: 0 to 2 percent, and the balance of iron and inevitable impurity elements.
Further, the iron-copper-zinc-titanium prealloyed powder comprises the following components in percentage by mass: copper: 10-30%, zinc: 20 to 40%, titanium: 2 to 6%, silicon: 0 to 2 percent, and the balance of iron and inevitable impurity elements.
The iron-copper prealloying powder, the iron-copper-nickel-tin prealloying powder and the iron-copper-zinc-titanium prealloying powder are prepared by a high-pressure water gas atomization method, or are prepared by a mechanical grinding coupling high-pressure water gas atomization method.
The method for preparing the drill bit material by using the zirconium hydride reinforced diamond-impregnated bit iron-based matrix material comprises the following steps of:
weighing raw materials of an iron-based matrix material according to parts by weight, grinding, uniformly mixing, adding diamond particles, and uniformly mixing to obtain a mixed material;
secondly, prepressing the mixed material obtained in the first step for 3-5 minutes at 15-30 MPa to obtain a pressed blank;
step three, under vacuum or protective atmosphere, carrying out hot-pressing sintering on the pressed blank obtained in the step two for 5-15 minutes at the temperature of 750-850 ℃ under the pressure of 30-60 MPa, and cooling to room temperature to obtain a sintered blank;
step four, placing the sintered blank obtained in the step three into a vacuum heating furnace, and vacuumizing until the pressure in the furnace is less than 2 multiplied by 10 -2 Pa, heating to 300-500 ℃, keeping for 1-2 hours, stopping heating, taking out and cooling to room temperature when the temperature in the furnace is reduced to below 90 ℃, thus obtaining the product.
Preferably, the diamond particles in the first step have a size of 60 to 100 meshes, and the diamond concentration in the drill bit material is 45 to 75%.
The invention takes the iron-copper prealloying powder as the framework material, and has better compatibility with diamond and other components; the iron-copper-nickel-tin prealloyed powder and/or the iron-copper-zinc-titanium prealloyed powder are/is used as a metal bonding material, so that the pressing formability and the sinterability are good, and the wettability to diamond is good; during the sintering process of the iron-based matrix material consisting of the framework material, the metal bonding material and the zirconium hydride, the passivation film formed on the surface of metal particles due to oxidation can be reduced by utilizing the activation effect of the zirconium hydride, so that the densification of the matrix is promoted; zirconium hydride is uniformly dispersed in the metal matrix, so that the dislocation can be effectively prevented from moving and stored, the growth of crystal grains is limited, and the wear resistance and the mechanical property of the matrix are improved. The drill bit is prepared by using the iron-based matrix material of the zirconium hydride reinforced diamond-impregnated drill bit, the matrix structure is fine and uniform, the component segregation is avoided, the process is simple and convenient to control, the relative density of the sintered iron-based matrix material reaches more than 98%, the matrix hardness is 35-38 HRC, the relative density of the drill bit material reaches more than 95%, and the drill bit has good bending strength and wear resistance and is suitable for hard and strong-grindability processing objects.
Drawings
FIG. 1 is a scanning electron micrograph of an iron-copper prealloyed powder according to example 1;
FIG. 2 is a scanning electron micrograph of an iron-copper-zinc-titanium prealloyed powder of example 1;
FIG. 3 is a scanning electron micrograph of an iron-copper-nickel-tin prealloyed powder of example 1;
FIG. 4 is a graph of relative density and hardness as a function of sintering temperature for the sintered body described in example 1.
Detailed Description
In order to make the technical purpose, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention are further described below with reference to specific examples, but the examples are intended to illustrate the present invention and should not be construed as limiting the present invention, and those who do not specify any particular technique or condition in the examples are performed according to techniques or conditions described in documents in the art or according to product specifications.
The following are providedIn the examples, the zirconium hydride powder with the particle size of 400 meshes is adopted, and the chemical components are as follows: zrH 2 More than or equal to 99 percent of Cl, less than or equal to 0.02 percent of Fe, less than or equal to 0.2 percent of Ca and less than or equal to 0.1 percent of Mg. The component iron in the iron-copper-nickel-tin prealloying powder and the iron-copper-zinc-titanium prealloying powder adopts reduced iron powder as a raw material, the component copper adopts electrolytic copper powder as a raw material, the component zinc adopts gas atomized zinc powder, the component boron adopts ferrosilicon powder with 5wt% of boron as a boron raw material, the component silicon adopts ferrosilicon powder with 45wt% of silicon as a silicon raw material, and the granularity is about 300 meshes.
Example 1
The zirconium hydride reinforced diamond-impregnated bit iron-based matrix material comprises the following raw materials in parts by weight: 50 parts of iron-copper prealloying powder, 40 parts of iron-copper-zinc-titanium prealloying powder, 10 parts of iron-copper-nickel-tin prealloying powder and 0.5 part of zirconium hydride.
The iron-copper prealloying powder is Cu20Fe80 powder, namely the mass ratio of copper to iron in the iron-copper prealloying powder is 1. The iron-copper prealloying powder is self-made by a water-gas atomization method and comprises the following steps: heating pure iron and electrolytic copper to be completely molten under the argon atmosphere, then heating to 1500 ℃, stirring for 3 minutes, keeping the temperature and standing for 2 minutes, and removing slag to obtain iron-copper alloy liquid; heating the iron-copper alloy liquid to 1650 ℃ for pouring (the pouring speed is 10 kg/min), pouring into a tundish at 750-850 ℃, and passing through the bottom of the tundish
The ceramic honeycomb duct with the thickness of 8mm flows out, under the protection of nitrogen (the flow is 60L/min), the ceramic honeycomb duct is crushed into powder by high-pressure water with the pressure of 95MPa, the powder naturally falls into cooling water for cooling, and then the alloy powder with the water content of 10-15 percent is obtained through precipitation and solid-liquid separation; drying for 1 hour at 300 ℃ under the protection of mixed gas with the volume ratio of hydrogen to nitrogen of 1; then placing the alloy powder into a steel belt type reduction furnace, wherein the thickness of the alloy powder is about 20mm, and reducing the alloy powder for 2 hours at 650 ℃ in a mixed atmosphere with the hydrogen-nitrogen volume ratio of 5; cooling to 400 deg.C, holding for 1 hr, cooling to room temperature, and sieving with 400 mesh sieve.
The iron-copper-zinc-titanium prealloyed powder comprises the following components in percentage by mass: copper: 15%, zinc: 25%, titanium: 4%, silicon: 1% and the balance of iron and inevitable impurity elements. The iron-copper-nickel-tin prealloying powder comprises the following components in percentage by mass: copper: 30%, nickel: 5%, tin: 9%, silicon: 1 percent, and the balance of iron and inevitable impurity elements. The iron-copper-zinc-titanium prealloying powder and the iron-copper-nickel-tin prealloying powder are prepared by adopting a mechanical grinding and high-pressure water gas atomization method. The mechanical grinding and high-pressure water gas atomization combined method comprises the following specific steps:
(1) Preparing raw materials of each component, and weighing the raw materials according to the mass percentage;
(2) Mixing the raw materials in an argon atmosphere, and performing ball milling for 2 hours to obtain intermediate alloy powder; ball-milling at a ball-milling speed of 400r/min and drying at 80 ℃ by taking absolute ethanol as a grinding aid, wherein the ball-milling ratio is 10;
(3) Heating the intermediate alloy powder obtained in the step (2) at 900 ℃ under argon atmosphere until the intermediate alloy powder is completely melted, then heating to 1100 ℃ at 5 ℃, stirring for 3 minutes, standing for 2 minutes at the temperature, and removing slag to obtain intermediate alloy liquid;
(4) Heating the intermediate alloy liquid obtained in the step (3) to 1350 ℃ for pouring (the pouring speed is 10 kg/min), pouring the intermediate alloy liquid into a tundish at the temperature of 750-850 ℃, and passing through the bottom of the tundish
The ceramic honeycomb duct with the thickness of 8mm flows out, under the protection of nitrogen (the flow is 60L/min), the ceramic honeycomb duct is crushed into powder by high-pressure water with the pressure of 95MPa, the powder naturally falls into cooling water for cooling, and then the alloy powder with the water content of 10-15 percent is obtained through precipitation and solid-liquid separation; drying for 1 hour at 300 ℃ under the protection of mixed gas with the volume ratio of hydrogen to nitrogen of 1; then placing the alloy powder into a steel belt type reduction furnace, wherein the thickness of the alloy powder is about 20mm, and reducing for 4 hours at 450 ℃ in a mixed atmosphere with the hydrogen-nitrogen volume ratio of 5; cooling to 250 deg.C, holding the temperature for 2 hr, cooling to room temperature, and sieving with 400 mesh sieve.
Scanning electron microscopy was used to characterize the iron-copper prealloyed powder prepared by the water-gas atomization method, as well as the iron-copper-zinc-titanium prealloyed powder and the iron-copper-nickel-tin prealloyed powder prepared by the mechanical grinding combined high-pressure water-gas atomization method, and the results are shown in fig. 1-3. The microscopic morphology of the iron-copper prealloyed powder is spherical or spheroidal, and the particle size is smaller; the iron-copper-zinc-titanium prealloyed powder particles are irregular and exist in a particle aggregation form; the iron-copper-nickel-tin prealloyed powder particles are regular, ellipsoidal and narrow in particle size distribution.
Prepressing the iron-based matrix material in the embodiment 1 at 20MPa for 3 minutes to obtain a pressed blank; the pressed blank is sintered for 8 minutes under the conditions of 50MPa, 700-800 ℃ and vacuum hot pressing (the vacuum degree is maintained at 2 multiplied by 10) -2 Pa, respectively taking the sintering temperature of 750 ℃, 770 ℃, 790 ℃, 810 ℃, 830 ℃ and 850 ℃, and cooling to room temperature to obtain a sintered blank; placing the sintered blank in a vacuum heating furnace, vacuumizing until the pressure in the furnace is less than 2 multiplied by 10 -2 Pa, raising the temperature to 450 ℃, keeping the temperature for 1 hour, stopping heating, taking out and cooling to room temperature after the temperature in the furnace is reduced to below 90 ℃ to obtain a sintered body, and detecting the relative density and hardness of the sintered body, wherein the results are shown in figure 4. As can be seen from fig. 4, the sintered body has the highest relative density and hardness at a sintering temperature of 810 ℃.
Example 2
The zirconium hydride reinforced diamond-impregnated bit iron-based matrix material is composed of the following raw materials in parts by weight: 50 parts of iron-copper prealloying powder, 10 parts of iron-copper-nickel-tin prealloying powder, 40 parts of iron-copper-zinc-titanium prealloying powder and 0.4 part of zirconium hydride.
Example 3
The zirconium hydride reinforced diamond-impregnated bit iron-based matrix material comprises the following raw materials in parts by weight: 50 parts of iron-copper prealloying powder, 10 parts of iron-copper-nickel-tin prealloying powder, 40 parts of iron-copper-zinc-titanium prealloying powder and 0.6 part of zirconium hydride.
Example 4
The zirconium hydride reinforced diamond-impregnated bit iron-based matrix material is composed of the following raw materials in parts by weight: 50 parts of iron-copper prealloying powder, 10 parts of iron-copper-nickel-tin prealloying powder, 40 parts of iron-copper-zinc-titanium prealloying powder and 0.2 part of zirconium hydride.
The iron-copper prealloyed powder, iron-copper-nickel-tin prealloyed powder and iron-copper-zinc-titanium prealloyed powder described in examples 2-4 are all the same as in example 1.
The method for preparing the drill bit material by using the zirconium hydride reinforced diamond-impregnated bit iron-based matrix material comprises the following steps of:
weighing raw materials of the iron-based matrix material according to parts by weight, grinding, uniformly mixing, adding diamond particles, and uniformly mixing to obtain a mixed material; the concentration of the diamond particles is 60% (i.e. 0.6 ct/cm) 3 ) The granularity of the diamond particles is 70/80 meshes (accounting for 40 percent), 60/70 meshes (accounting for 60 percent);
step two, prepressing the mixed material obtained in the step one for 3 minutes at 20MPa to obtain a pressed blank;
step three, the pressed blank obtained in the step two is placed in a vacuum hot pressing sintering furnace, and the furnace is vacuumized until the pressure in the furnace is less than 2 multiplied by 10 -2 Pa, hot-pressing and sintering at 50MPa and 810 ℃ for 8 minutes, and cooling to room temperature to obtain a sintered blank;
step four, placing the sintered blank obtained in the step three into a vacuum heating furnace, and vacuumizing until the pressure in the furnace is less than 2 multiplied by 10 -2 Pa, heating to 450 ℃, keeping for 1 hour, stopping heating, taking out and cooling to room temperature when the temperature in the furnace is reduced to below 90 ℃, thus obtaining the drill bit material.
Comparative example 1
The diamond-impregnated bit iron-based matrix material is composed of the following raw materials in parts by weight: 50 parts of iron-copper prealloying powder, 10 parts of iron-copper-nickel-tin prealloying powder and 40 parts of iron-copper-zinc-titanium prealloying powder.
Comparative example 1 is different from example 1 in that the raw material of the iron-based matrix material of the diamond-impregnated drill bit does not contain zirconium hydride.
The iron-based matrix materials of the diamond-impregnated drill bits prepared in the examples 1 to 4 and the comparative example 1 are pre-pressed for 3 minutes at 20MPa, and then sintered for 8 minutes at 50MPa and 810 ℃ by hot pressing in vacuum (the vacuum degree is maintained at 2 multiplied by 10) -2 Pa), cooling to room temperature, then placing in a vacuum heating furnace, vacuumizing until the pressure in the furnace is less than 2 x 10 -2 Pa, heating to 450 deg.C, keeping at constant temperature for 1 hr, stopping heating, cooling to below 90 deg.C, taking out, and coolingCooled to room temperature and recorded as blank carcass.
Measuring the density of the blank tire body by adopting a drainage method, and testing and calculating to obtain the relative density; and (3) measuring the hardness of the blank matrix by adopting an HRS-150 digital display Rockwell hardness tester, and measuring the bending strength of the blank matrix by adopting a universal testing machine. The results of the performance parameters of the blank tire bodies are shown in table 1.
TABLE 1 blank carcass Performance parameters
The densities of the drill bit materials obtained in examples 1 to 4 were measured by a drainage method, and the relative densities were measured and calculated; measuring the bending strength of the drill bit material by using a universal testing machine; the abrasion ratio of the drill bit material is measured by adopting a DHM-2 abrasion ratio tester, the outer diameter of the SiC grinding wheel used for the test is 100mm, the inner diameter is 20mm, the thickness is 20mm, and the pneumatic pressurization is 500g, the linear speed of the grinding wheel is 15m/s, and the swing frequency of the workpiece is 35 times/min during the measurement. The results of the performance parameters of the drill bit material are shown in table 2.
TABLE 2 drill bit Material Performance parameters
As can be seen from tables 1 and 2, the iron-based matrix material of the present invention has good sinterability by using the iron-copper prealloyed powder as the framework material and the iron-copper-nickel-tin prealloyed powder and the iron-copper-zinc-titanium prealloyed powder as the metal bonding material; and the activation of zirconium hydride can promote the densification of the tire body and improve the wear resistance and mechanical property of the tire body.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and these modifications or substitutions do not depart from the spirit of the corresponding technical solutions of the embodiments of the present invention.
Claims (5)
1. The method for preparing the drill bit material by using the zirconium hydride reinforced diamond-impregnated bit iron-based matrix material is characterized by comprising the following steps of:
weighing raw materials of an iron-based matrix material according to parts by weight, grinding, uniformly mixing, adding diamond particles, and uniformly mixing to obtain a mixed material;
secondly, prepressing the mixed material obtained in the first step for 3 to 5 minutes at 15 to 30MPa to obtain a pressing blank;
thirdly, hot-pressing and sintering the pressed blank obtained in the second step for 5 to 15 minutes at the temperature of between 750 and 850 ℃ under the pressure of between 30 and 60MPa, and cooling to room temperature to obtain a sintered blank;
step four, placing the sintered blank obtained in the step three into a vacuum heating furnace, and vacuumizing until the pressure in the furnace is less than 2 multiplied by 10 -2 Pa, heating to 300-500 ℃, keeping for 1-2 hours, stopping heating, taking out and cooling to room temperature when the temperature in the furnace is reduced to below 90 ℃ to obtain the product;
the iron-based matrix material is composed of the following raw materials in parts by weight:
45-60 parts of iron-based framework material, 40-55 parts of metal bonding material and 0.2-0.6 part of zirconium hydride, wherein the iron-based framework material and the metal bonding material are pre-alloyed powder;
the iron-based framework material is iron-copper pre-alloy powder;
the metal bonding material is prepared by mixing iron-copper-nickel-tin prealloying powder and iron-copper-zinc-titanium prealloying powder according to the mass ratio of 1 to 2 to 5, wherein the iron-copper-zinc-titanium prealloying powder and the iron-copper-nickel-tin prealloying powder are prepared by adopting a mechanical grinding combined high-pressure water gas atomization method;
the mechanical grinding and high-pressure water gas atomization combined method comprises the following specific steps:
(1) Preparing raw materials of each component, and weighing the raw materials according to the mass percentage;
(2) Mixing the raw materials in an argon atmosphere, and performing ball milling for 2 hours to obtain intermediate alloy powder; ball-milling at a ball-milling speed of 400r/min and drying at 80 ℃ by taking absolute ethanol as a grinding aid, wherein the ball-milling ratio is 10;
(3) Heating the intermediate alloy powder obtained in the step (2) at 900 ℃ under argon atmosphere until the intermediate alloy powder is completely melted, then heating to 1100 ℃ at 5 ℃, stirring for 3 minutes, standing for 2 minutes at the temperature, and removing slag to obtain intermediate alloy liquid;
(4) Heating the intermediate alloy liquid obtained in the step (3) to 1350 ℃ for pouring, crushing the intermediate alloy liquid into powder under the protection of nitrogen by using high-pressure water with the pressure of 95MPa, naturally dropping the powder into cooling water for cooling, and then carrying out precipitation and solid-liquid separation to obtain alloy powder with the water content of 10-15%; drying for 1 hour at 300 ℃ under the protection of mixed gas with the volume ratio of hydrogen to nitrogen of 1; then reducing for 4 hours at 450 ℃ in a mixed atmosphere with the hydrogen-nitrogen volume ratio of 5; cooling to 250 deg.c, maintaining for 2 hr, cooling to room temperature and sieving with 400 mesh sieve.
2. The method for preparing the drill bit material by using the zirconium hydride reinforced iron-based matrix material of the diamond-impregnated drill bit as claimed in claim 1, wherein the method comprises the following steps: the mass percentage of copper in the iron-copper prealloying powder is 15 to 30 percent.
3. The method for preparing the drill bit material by using the zirconium hydride reinforced iron-based matrix material of the diamond-impregnated drill bit according to claim 1, wherein the method comprises the following steps: the iron-copper-nickel-tin prealloying powder comprises the following components in percentage by mass: copper: 20 to 40%, nickel: 3 to 6 percent, tin: 5 to 10%, silicon: 0 to 2 percent, and the balance of iron and inevitable impurity elements.
4. The method for preparing the drill bit material by using the zirconium hydride reinforced iron-based matrix material of the diamond-impregnated drill bit as claimed in claim 1, wherein the method comprises the following steps: the iron-copper-zinc-titanium prealloyed powder comprises the following components in percentage by mass: copper: 10 to 30%, zinc: 20 to 40%, titanium: 2 to 6%, silicon: 0 to 2 percent, and the balance of iron and inevitable impurity elements.
5. The method for preparing the drill bit material by using the zirconium hydride reinforced iron-based matrix material of the diamond-impregnated drill bit as claimed in claim 1, wherein the method comprises the following steps: in the first step, the granularity of the diamond particles is 60-100 meshes, and the concentration of diamond in the drill bit material is 45-75%.
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| US20190247950A1 (en) * | 2016-12-01 | 2019-08-15 | Ngk Insulators, Ltd. | Conductive supporting member and method for producing the same |
| CN112725674A (en) * | 2021-03-19 | 2021-04-30 | 中南大学 | Diamond composite material and preparation method and application thereof |
| CN113500198A (en) * | 2021-07-08 | 2021-10-15 | 河南黄河旋风股份有限公司 | Preparation method of high-zinc alloy powder |
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| GB1028307A (en) * | 1962-11-27 | 1966-05-04 | Jersey Prod Res Co | Improvements in diamond abrasive materials |
| GB0707821D0 (en) * | 2004-10-18 | 2007-05-30 | Smith International | Impregnated diamond cutting structures |
| US20190247950A1 (en) * | 2016-12-01 | 2019-08-15 | Ngk Insulators, Ltd. | Conductive supporting member and method for producing the same |
| CN112725674A (en) * | 2021-03-19 | 2021-04-30 | 中南大学 | Diamond composite material and preparation method and application thereof |
| CN113500198A (en) * | 2021-07-08 | 2021-10-15 | 河南黄河旋风股份有限公司 | Preparation method of high-zinc alloy powder |
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