34results about How to "Play the role of purifying the interface" patented technology

The invention provides a preparation method of (TiV)C steel bond hard alloy. Titanium and vanadium whose ratio is 1:1 are prepared, and a mixture and graphite powder are prepared into in-situ synthesized (TiV)C mixed powder, wherein the atomic mole ratio between C and Ti+V is 0.7-1.1; ferrovanadium powder, ferrochromium powder, ferromolybdenum powder, ferroboron powder, ferrous powder, ferrosilicon powder, ferromanganese powder, nickel powder, copper powder, colloidal graphite and a rare earth raw material are prepared according to a required mass ratio of bonded-phase metal chemical components, ball-milling is carried out by a steel ball, absolute ethanol as a medium and PVA (polyvinyl alcohol) are added, after the ball-milling is finished, slurry is dried and pressed for forming, and the steel bond alloy is obtained. In situ reaction synthesis technology and liquid phase sintering technology are combined, and the (TiV)C steel bond hard alloy is prepared. (TiV)C is synthesized in situ in a substrate through reaction in the sintering process, the fineness of particles is improved, no sharp angle is formed on the surface, and a substrate interface is relatively good in adhesion and clean. The comprehensive mechanical property of the alloy can be improved, the price is low, and the process is simple and convenient.

The invention relates to a preparation method of modified high-manganese steel base TiC steel bonded carbide. The preparation method is characterized by preparing in-situ synthesized TiC powder in a required proportion from titanium powder and graphite powder according to the atomic ratio of C to Ti, namely 0.8-1.0; preparing the raw materials including ferromolybdenum powder, ferrovanadium powder, ferrochrome powder, ferromanganese powder, ferrosilicon powder, ferrum powder, nickel powder, colloidal graphite and rare earth according to a required proportion of mass ratios of chemical components of bonding phase metals, filling steel balls, performing ball milling, adding absolute ethyl alcohol used as a medium and PVA (polyvinyl alcohol) to the steel balls, drying the slurry after ball milling, and then forming the slurry by pressing and sintering the product, thus obtaining steel bonded carbide. The preparation method has the advantages that the modified high-manganese steel base TiC steel bonded carbide is prepared by combining an in-situ reactive synthesis technology and a liquid phase sintering technology; as TiC is synthesized in situ inside a matrix through reaction in the sintering process, the reinforced particles have small sizes and do not have sharp corners on the surfaces, and the matrix is better in interface bonding and has a clean interface; the preparation method of steel bonded carbide is conductive to improving the comprehensive mechanical properties of carbide, is low in price and is simple and convenient in process.

The invention relates to a preparation method of ultrahigh-manganese steel based TiC steel bond hard alloy. The preparation method is characterized by comprising the following steps: preparing titanium powder and graphite powder into in-situ synthesized TiC powder with the required proportion according to the C / Ti atomic ratio of 0.8-1.0; preparing ferromolybdenum powder, ferrovanadium powder, ferrochromium powder, ferromanganese powder, ferrosilicon powder, iron powder, nickel powder, colloidal graphite and rare earth raw materials according to the required mass ratio of bonded-phase metal chemical components, performing ball-milling by a steel ball, adding absolute ethanol as a medium and PVA (polyvinyl alcohol), after the ball-milling process is finished, drying slurry, pressing for forming, and sintering to obtain the steel bond alloy. According to the preparation method, the ultrahigh-manganese steel based TiC steel bond hard alloy is prepared by combining an in-situ reaction synthesis technology with a liquid-phase sintering technology; as TiC is synthesized in situ in a substrate through reaction in the sintering process, the fineness of particles is improved, no sharp angle is formed on the surface, and a substrate interface is relatively good in adhesion and clean; the comprehensive mechanical property of the alloy can be improved, the price is low, and the process is simple and convenient.

The invention relates to a preparation method of a TiC high-wear-resistant steel-bonded hard alloy. The preparation method is characterized by comprising the following steps: using titanium powder and graphite powder to prepare in-situ synthesized TiC powder according to the atomic ratio 0.7-1.1 of C to Ti; mixing ferrochromium powder, ferromolybdenum powder, ferrovanadium powder, ferrotungsten powder, ferroniobium powder, nickel powder, ferroboron powder, iron powder, colloidal graphite and a rare earth material according to the chemical component mass ratio of the bonding phase metals; filling the mixed powder in a steel ball mill; adding absolute ethyl alcohol as a medium and PVA (Polyvinyl Acetate) to the ball mill; after ball milling, drying the obtained slurry, pressing, molding and sintering the dried substance to obtain the steel-bonded hard alloy. The preparation method disclosed by the invention combines the in-situ reaction synthesis technology with the liquid-phase sintering technology to prepare the TiC high-wear-resistant steel bonded hard alloy. As TiC is prepared by in-situ synthesis inside the substrate through the reaction during the sintering process, the reinforced particle size is fine, the surface is free of sharp corners, the substrate interface bonding effect is good, and the interface is clean. The preparation method for the steel-bonded alloy can improve the comprehensive mechanical property of the alloy, and is low in price and simple and convenient in the technology.

The invention relates to a preparing method for a high-toughness and heat resisting TiC / TiN steel bond hard alloy. The preparing method is characterized that one of TiO2 powder, TiH2 powder and Ti powder and colloidal graphite powder are prepared according to the C / Ti atomic ratio of 0.7-1.1, one of the TiO2 powder, the TiH2 powder and the Ti powder and urea ((NH2)2CO) are prepared according to the N / Ti atomic ratio of 0.4-1.1, and accordingly in-situ synthesized TiN mixed powder is prepared; ferro-molybdenum powder, ferro-vanadium powder, ferro-chromium powder, ferro-manganese powder, ferro-silicon powder, iron powder, ferro-boron powder, nickel powder, colloidal graphite and rare earth raw materials are prepared according to the needed proportion for the bonding phase metal chemical component mass ratio to be arranged into a steel ball mill, absolute ethyl alcohol serving as a medium and PVA are added, after ball milling and slurry drying, pressing forming is conducted, and the steel bond alloy is obtained through sintering. The in-situ reaction synthesizing technology and the liquid phase sintering technology are combined, reinforced particles are fine in size, the surfaces are free of sharp corners, base body interface bonding is good, and the interface is clean. Through the method for preparing the steel bond alloy, the comprehensive mechanical performance of the alloy can be improved, cost is low, and the technology is easy and convenient to conduct.

The invention relates to a preparing method for a TiC matrix steel base steel bond hard alloy. The preparing method includes the following steps that titanium carbide powder and matrix steel matrix powder are weighed according to the proportion, alloy powder is put into a ball grinding machine to be mixed and smashed, added absolute ethyl alcohol is a process control agent, and the wet mixed powder is put into a vacuum drying box to be dried after ball grinding and is used for standby use after drying; an organic monomer and an initiator are added into a solvent to prepare pre-mixed liquid; an additive improving slurry fluidity and dispersity is added; a catalyst and a pH modifier are added and are evenly stirred, and slurry is obtained; and the slurry is injected into an injection and coagulation die, vacuum suction or vibration gas removing is conducted, after the slurry is cured to be formed, a blank is put into the vacuum drying box to be dried, the dried blank is subjected to integrated degumming and sintering in a vacuum sintering furnace, and the steel bond hard alloy is prepared. The preparing method has the beneficial effects that the technology is simple, the cost is relatively low, and parts large in size and complex in shape are easy to prepare on the basis that the macro performance of the steel bond hard alloy is ensured.

The invention relates to a preparation method of a high-strength / toughness super-high manganese steel-based TiC / TiN steel bonded hard alloy. The preparation method is characterized by mixing one of TiO2 powder, TiH2 powder or Ti powder with colloidal graphite according to a C / Ti atomic proportion of 0.7 to 1.1, thus preparing in-situ synthetic TiC powder; mixing one of the TiO2 powder, the TiH2 powder or the Ti powder with urea ((NH2)2CO) according to an N / Ti atomic proportion of 0.4 to 1.1, thus preparing in-situ synthetic TiN mixed powder; preparing Mo-Fe powder, V-Fe powder, Cr-Fe powder, Mn-Fe powder, Si-Fe powder, Fe powder, Ni powder, the colloidal graphite and a rare-earth raw material according to proportions required by adhesive-phase metal chemical component mass proportions, filling and ball-milling in a steel ball, adding absolute ethyl alcohol as a medium and PVA (Polyvinyl Acetate) in the steel ball, drying slurry after ball milling, pressing, forming and sintering, thus obtaining steel bonded alloy. According to the preparation method disclosed by the invention, an in-situ reaction synthesis technology and a liquid-phase sintering technology are combined, the particle size is small, the surface has no sharp corner, a matrix interface is better in bonding, and the interface is clear. The preparation method of the steel bonded alloy is capable of increasing the comprehensive mechanical property of the alloy, the cost is low, and the technology is simple and convenient.

The invention relates to a preparation method of high-strength-and-toughness high-wear-resistance TiC / TiN steel bond hard alloy. The preparation method of the high-strength-and-toughness high-wear-resistance TiC / TiN steel bond hard alloy is characterized in that one of TiO2 powder, TiH2 powder and Ti powder is mixed with aquadag powder with the atomic ratio of C / Ti being 0.7-1.1, and one of the TiO2 powder, the TiH2 powder and the Ti powder is mixed with carbamide ((NH2) 2CO ) with the atomic ratio of N / Ti being 0.4-1.1 and made into in-situ synthesized TiN mixed powder; ferrochromium powder, ferromolybdenum powder, ferrovanadium powder, ferrotungsten powder, ferroniobium powder, nickel powder, ferroboron powder, iron power, aquadag and rare earth raw materials are mixed according to the needed chemical component mass ratio of adhesive phase metal and placed in a steel ball mill, absolute ethyl alcohol is added and used a medium, and PVA is also added; and after ball milling, slurry is dried, and then the steel bond hard alloy is obtained through pressing forming and sintering. According to the preparation method of the high-strength-and-toughness high-wear-resistance TiC / TiN steel bond hard alloy, the in-situ reaction and synthesis technology and the liquid phase sintering technology are combined, the reinforced particles are fine in size, the surfaces of the particles are free of sharp corners, matrix interface bonding is good, and the matrix interface is clean. By the adoption of the preparation method of the steel bond hard alloy, the comprehensive mechanical performance of the prepared steel bond hard alloy can be improved, the cost is low, and the technology is simple and convenient.

The invention relates to a preparation method for high-toughness modified high-manganese steel-based TiC / TiN steel-bonded hard alloy. The preparation method is characterized in that one of Ti02 powder, TiH2 powder or Ti powder and colloidal graphite powder are prepared according to the atomic ratio being 0.7-1.1 to be in-situ synthesized TiC mixed powder; one of Ti02 powder, TiH2 powder or Ti powder and urea ((NH2)2CO) are prepared according the atomic ratio being 0.4-1.1 to be in-situ synthesized TiN mixed powder; ferromolybdenum powder, ferrovanadium powder, ferrochrome powder, ferromanganese powder, ferrosilicon powder, ferrous powder, nickel powder, colloidal graphite and rare earth raw materials are prepared according to the needed proportion of the adhesive phase metal chemical composition mass ratio; steel balls are stored, and ball milling is conducted, wherein absolute ethyl alcohol is added to serve as a medium and PVA; and after ball milling is conducted, slurry is dried and then subjected to pressing forming, sintering is conducted, and the steel-bonded alloy is obtained. According to the preparation method, in-situ reaction synthetic technology and liquid phase sintering technology are combined, the fineness of particle sizes is enhanced, the surface has no sharp corners, combination of the substrate interface is good, and the interface is clean; the preparation method for the steel-boned alloy can improve the comprehensive mechanical property of the alloy, the price is low, and the technique is simple and convenient.

The invention relates to a preparation method of a high-strength / ductility modified high manganese steel base VC steel bonded hard alloy. The preparation method is characterized by preparing in-situ synthesized VC mixed powder through V205 powder (vanadium) and graphite powder according to a C / V205 atomic ratio of 0.4-0.5; and ferromolybdenum powder, ferrovanadium powder, ferrochromium powder, ferromanganese powder, ferrosilicon powder, iron powder, nickel powder, colloidal graphite and rare earth raw materials are mixed according to a ratio needed by a bonding phase metal chemical component mass ratio, and are added in a steel ball for ball milling; anhydrous ethanol is added as a medium and PVA; and after ball milling, pulp is dried to press and sinter to obtain the steel bonded alloy. The preparation method combines the in-situ reaction synthesis technology with the liquid-phase sintering technology; and as VC is synthesized in situ in matrix through the reaction in the sintering process, reinforced particles are fine in size, free of sharp angles on the surfaces, better in matrix interface combination and clean in interfaces. The steel bonded alloy preparation method can improve the comprehensive mechanical performance of the alloy, and is low in cost and simple in process.

The invention relates to a preparation method of a high-strength-and-toughness ultrahigh-manganese-steel based VC steel bonded hard alloy. The preparation method is characterized in that V205 powder(vanadium) and graphite powder are prepared according to the C / V205 atomic ratio ranging from 0.4 to 0.5 to form in-situ synthesis VC mixed powder; and ferro-molybdenum powder, ferrovanadium powder, chromium iron powder, ferromanganese iron powder, silicon iron powder, iron powder, nickel powder, aquadag and rare earth raw materials are prepared according to the needed proportion of the bonding phase metal chemical component mass ratio, steel balls are added for ball milling, absolute ethyl alcohol is added to serve as a medium and PVA, and slurry is dried to be pressed, formed and sintered after ball milling to obtain the steel bonded hard alloy. According to the preparation method, the in-situ reaction synthetic technique and the liquid phase sintering technique are combined, as VC is obtained through in-situ synthesis inside a base in reacting in the sintering process, the reinforced particle size is small, the surface is free of sharp corners, base interface bonding is better, and an interface is clean. By means of the steel bonded alloy preparing method, the comprehensive mechanical property of the alloy can be improved, the price is low, and the process is simple and convenient.

The invention relates to a preparation method of TiC high-alloy hot work die steel based steel bond hard alloy. The preparation method comprises the following steps: weighing titanium carbide powder and high-alloy hot work die steel based body powder in proportion; mixing and pulverizing alloy powder in a ball mill, wherein added anhydrous ethanol is a process control agent; after ball-milling is finished, drying wet mixed powder in a vacuum drying box for subsequent use; adding organic monomer and an initiator in a solvent to prepare premixed liquid; adding an additive which improves fluidity and dispersibility of slurry; adding a catalyst and a pH regulator, and evenly stirring to obtain the slurry; injecting the slurry into a gel-casting mold and vacuumizing or shaking to remove air; after the slurry is solidified and formed, drying a blank in the vacuum drying box; and carrying out integral degumming and sintering on the dried blank in a vacuum sintering furnace to prepare the steel bond hard alloy. The preparation method of the TiC high-alloy hot work die steel based steel bond hard alloy has the advantages of simple process, low cost and easiness in preparation of large parts in complicated shapes on the basis of the macroscopic performance of the steel bond hard alloy.

The invention relates to a preparation method for a TiN steel-bonded hard alloy based on nickel chromium molybdenum alloy cast iron. The preparation method is characterized in that in-situ synthesis TiN powder is prepared, wherein one or three of Ti02 powder or TiH2 powder or Ti powder and urea ((NH2)2CO) are prepared into the in-situ synthesis TiN powder according to the N / Ti atomic ratio of 0.4-1.1; and molybdenum iron powder, vanadium iron powder, chrome iron powder, ferromanganese powder, ferrosilicon powder, iron powder, nickel powder, colloidal graphite and rare earth raw materials are prepared according to the required proportion of the mass ratio of bonding phase chemical compositions and put into a steel ball to be ball-milled, anhydrous ethanol as a medium and PVA are added, slurry obtained after ball-milling is dried, pressed, formed and sintered, and the TiN steel-bonded hard alloy is obtained. According to the preparation method, a in-situ reaction synthesis technology is combined with a liquid phase sintering technology, the size of reinforced particles is wee, the surface is free of sharp tips, the base body interface bonding is good, and the interface is clean. By the adoption of the preparation method for the TiN steel-bonded hard alloy based on the nickel chromium molybdenum alloy cast iron, the comprehensive mechanical performance of the alloy can be improved, the cost is low, and the process is easy and convenient.

The invention relates to a preparation method of a high-strength / ductility high manganese steel base TiN steel bonded hard alloy. The preparation method is characterized by preparing in-situ synthesized TiN powder: one or three of TiO2 powder, TiH2 powder or Ti powder and urea ((NH2)2CO) are mixed according to a N / Ti atomic ratio of 0.4-1.1 to prepare the in-situ synthesized TiN mixed powder; and ferromolybdenum powder, ferrovanadium powder, ferrochromium powder, ferromanganese powder, ferrosilicon powder, iron powder, nickel powder, colloidal graphite and rare earth raw materials are mixed according to a ratio needed by a bonding phase metal chemical component mass ratio, and are sintered to obtain the TiN steel bonded alloy. The preparation method combines the in-situ reaction synthesis technology with the liquid-phase sintering technology; and reinforced particles are fine in size, free of sharp angles on the surfaces, better in matrix interface combination and clean in interfaces. The steel bonded alloy preparation method can improve the comprehensive mechanical performance of the alloy, and is low in cost and simple in process.

The invention relates to a preparation method of a high-strength-and-toughness high manganese steel-based VC steel bond hard alloy. The preparation method is characterized by comprising the following steps of mixing V2O5 powder (vanadium) and graphite powder according to a C / V2O5 atom ratio of 0.4 to 0.5 to prepare in-situ synthesized VC mixed powder, mixing molybdenum iron powder, vanadium iron powder, manganese iron powder, silicon iron powder, iron powder, nickel powder, colloid graphite and rare earth raw materials according to the required mass ratio of metal chemical components of a bonding phase, feeding steel balls for ball grinding, adding absolute ethyl alcohol serving as a medium and PVA, drying slurry obtained by the ball grinding, and carrying out pressing forming and sintering to obtain the steel bond alloy. An in-situ reaction synthesis technology and a liquid phase sintering technology are combined to prepare the high-strength-and-toughness high manganese steel-based VC steel bond hard alloy. As VC is synthesized in situ in a base body through reaction in the sintering process, enhanced particles are small in particle size, and no sharp corners are formed on the surface; and the base body is relatively high in interface combination, and the interface is clean. The preparation method of the steel bond alloy can improve the comprehensive mechanical property of the alloy; and furthermore, the preparation method is low in cost and simple in process.

The invention relates to a preparation method of an improved chromium-tungsten-manganese low-alloy cold work die steel base VC steel bonded hard alloy. The preparation method comprises the following steps: titanium carbide powder and medium-alloy hot work die steel matrix powder are weighed in proportion; alloy powder is put in a ball mill for mixing and crushing, wherein anhydrous ethanol is added as a process control agent; and after ball milling, wet mixed powder is put in a vacuum drying box for drying for future use. An organic monomer and an initiator are added in solvent to prepare premixed liquid; an additive for improving the slurry fluidity and dispersibility is added; a catalyst and a pH adjusting agent are added for uniformly stirring to obtain slurry; the slurry is injected in an injection condensation mold for vacuumizing or vibration degassing; after the slurry is formed by curing, a blank is put in the vacuum drying box for drying; and the dried blank is integrally degummed and sintered in the vacuum sintering furnace to prepare the steel bonded hard alloy. On the basis of guaranteeing macro-performances of the steel bonded hard alloy, the preparation method has the advantages of simple process, lower cost and easy preparation of large-size and complex-shape parts.

The invention relates to a preparation method for VC medium alloy cold work die steel based steel bonded hard alloy. The method comprises the following steps that titanium carbide powder and medium alloy cold work die steel substrate powder are weighed proportionally, alloy powder is put into a ball mill to be mixed and crushed, absolute ethyl alcohol is added to be used as a process control agent, after ball milling, the wet mixed powder is put into a vacuum drying oven to be dried, and the powder is used for standby use after being dried; organic monomers and an initiator are added into a solvent for preparing a pre-mixed solution; an additive for improving liquidity and dispersity of slurry is added; a catalyst and a pH conditioning agent are added, even stirring is conducted, and the slurry is obtained; and the slurry is poured into a gelcasting mold, vacuumizing or vibrating degassing is conducted, after the slurry is solidified and molded, a blank is put into the vacuum drying oven to be dried, the dried blank is subjected to integral degumming and sintering in vacuum sintering furnace, and the steel bonded hard alloy is prepared. On the basis that the macro-performance of the steel bonded hard alloy is ensured, the method has the advantages that the process is simple, the cost is low, and large-sized parts in complex shapes can be prepared easily.

The invention relates to a preparing method for a VC high alloy cold work die steel base steel bond hard alloy. The preparing method includes the following steps that titanium carbide powder and high alloy powder cold work die steel matrix powder are weighed according to the proportion, alloy powder is put into a ball grinding machine to be mixed and smashed, added absolute ethyl alcohol is a process control agent, and the wet mixed powder is put into a vacuum drying box to be dried after ball grinding and is used for standby use after drying; an organic monomer and an initiator are added into a solvent to prepare pre-mixed liquid; an additive improving slurry fluidity and dispersity is added; a catalyst and a pH modifier are added and are evenly stirred, and slurry is obtained; and the slurry is injected into an injection and coagulation die, vacuum suction or vibration gas removing is conducted, after the slurry is cured to be formed, a blank is put into the vacuum drying box to be dried, the dried blank is subjected to integrated degumming and sintering in a vacuum sintering furnace, and the steel bond hard alloy is prepared. The preparing method has the beneficial effects that the technology is simple, the cost is relatively low, and parts large in size and complex in shape are easy to prepare on the basis that the macro performance of the steel bond hard alloy is ensured.

The invention relates to a preparation method of TiC high wear-resistant steel-bonded hard alloy, which is characterized in that titanium powder and graphite powder are prepared into in-situ synthesized TiC powder in a required ratio according to the C / Ti atomic ratio of 0.7-1.1; Ferrochrome powder, ferromolybdenum powder, ferrovanadium powder, ferrotungsten powder, ferroniobium powder, nickel powder, ferroboron powder, iron powder, colloidal graphite and rare earth raw materials are prepared according to the required ratio of the chemical composition of the bonding phase metal, and the Put steel balls into ball mill, wherein add absolute ethanol as medium and PVA, after ball milling, dry the slurry, press into shape, sinter to obtain steel-bonded alloy. The invention combines in-situ reaction synthesis technology with liquid phase sintering technology to prepare TiC / high wear-resistant steel-bonded hard alloy. Since TiC is synthesized in situ inside the matrix through the reaction in the sintering process, the reinforced particle size is small, the surface has no sharp corners, and the matrix interface is well bonded and clean. The prepared steel-bonded alloy method can improve the comprehensive mechanical properties of the alloy, and has low price and simple process.

The invention relates to a preparing method for a VC-VN plastic steel base steel bond hard alloy. The preparing method includes the following steps that titanium carbide powder and plastic steel base powder are weighed according to the proportion, alloy powder is put into a ball grinding machine to be mixed and smashed, added absolute ethyl alcohol serves as a process control agent, and the wet mixed powder is put into a vacuum drying box after ball grinding to be dried for standby use; an organic monomer and an initiator are added into a solvent to prepare pre-mixed liquid; an additive for improving slurry fluidity and dispersity is added; a catalyst and a pH modifier are added and are evenly stirred, and slurry is obtained; and the slurry is injected into an injection and coagulation die, vacuum suction or vibration gas removing is conducted, after the slurry is cured to be formed, a blank is put into the vacuum drying box to be dried, the dried blank is subjected to integrated degumming and sintering in a vacuum sintering furnace, and the steel bond hard alloy is prepared. The preparing method has the beneficial effects that the technology is simple, the cost is relatively low, and parts large in size and complex in shape are easy to prepare on the basis that the macro performance of the steel bond hard alloy is ensured.

The invention relates to a preparation method for high-chromium high-nickel high-molybdenum alloy cast iron base VC steel-bonded hard alloy. The preparation method is characterized by comprising the steps that V205 powder (vanadium) and graphite powder are prepared into in-situ synthesis VC mixed powder at the atomic ratio that C / V205 is 0.4-0.5; and chromium iron powder, molybdenum iron powder, vanadium iron powder, nickel powder, iron powder, colloidal graphite and rare earth raw materials are prepared according to the ratio required by the bonding phase metal chemical component mass ratio and are loaded into a steel ball mill, absolute ethyl alcohol is added as a medium and PVA, after ball milling, slurry is dried and then subjected to pressing forming, and the steel-bonded hard alloy is obtained through sintering. According to the preparation method for the high-chromium high-nickel high-molybdenum alloy cast iron base VC steel-bonded hard alloy, the high-chromium high-nickel high-molybdenum alloy cast iron base VC steel-bonded hard alloy is prepared by combining the in-situ reaction synthesis technology with the liquid phase sintering technology; the VC is subjected to in-situ synthesis inside a substrate through reaction in the sintering process, so that reinforced particles are small in size, the surface is free of sharp corners, substrate interface bonding is good, and an interface is clean; the preparation method for the steel-bonded hard alloy can improve the comprehensive mechanical properties of the alloy; and in addition, the cost is low, and the process is simple.

The invention relates to a preparation method of an improved chromium-tungsten-manganese low alloy cold-work die steel base TiC steel bonded hard alloy. The preparation method comprises the following steps: titanium carbide powder and chromium-tungsten-manganese low alloy cold-work die steel matrix powder are weighed in proportion; alloy powder is put in a ball mill for mixing and crushing; anhydrous ethanol is added as a process control agent; and after ball milling, wet mixed powder is put in a vacuum drying box for drying for future use; an organic monomer and an initiator are added in solvent to prepare premixed liquid; an additive for improving the slurry fluidity and dispersibility is added; a catalyst and a pH adjusting agent are added for uniform stirring to obtain slurry; the slurry is injected in an injection solidification mold for vacuumizing or vibration degassing; after the slurry is formed by curing, a blank is put in the vacuum drying box for drying; and the dried blank is integrally degummed and sintered in a vacuum sintering furnace to prepare the steel bonded hard alloy. On the basis of guaranteeing macro-performances of the steel bonded hard alloy, the preparation method has the advantages of simple process, lower cost and easiness in preparation of large-size and complex-shape parts.

The invention relates to a preparation method for a VC plastic steel based steel bond hard alloy. The preparation method comprises the following steps that carbonized titanium powder and plastic steel matrix powder are weighed in proportion, and the alloy power is placed into a ball mill for mixing and crushing, wherein absolute ethyl alcohol is added as a process control agent, wet mixing powder is placed into a vacuum drying box for drying after ball milling, and drying is conducted for later use; organic monomers and an initiating agent are added into a solvent for premixed solution preparation; an addition agent for improving fluidity and dispersity of slurry is added; catalysts and a pH adjusting agent are added and evenly stirred, and the slurry is obtained; and the slurry is injected into an injection condensing die for vacuumizing or vibration degasification, a blank is placed into the vacuum drying box for drying after the slurry is solidified and formed, the dried blank is subjected to integrated degumming and sintering in a vacuum sintering furnace, and thus the steel bond hard alloy is prepared. On the basis of the condition that macro-performance of the steel bond hard alloy is guaranteed, the preparation method for the VC plastic steel based steel bond hard alloy has the advantages that the technique is simple, cost is low, and parts with large dimensions and complex shapes are easy to prepare.

The invention relates to a preparation method of TiC heatproof steel bonded carbide. The method comprises the following steps: processing titanium powder and graphite powder according to a C / Ti atom ratio of 0.7-1.1 to prepare in situ synthesized TiC powder with a required ratio; and preparing ferrochrome powder, ferromolybdenum powder, ferroboron powder, iron powder, nickel powder, copper powder, colloidal graphite and a rare earth raw material according to the required proportions of a mass ratio of bonding phase metal chemical components, adding a steel ball, adding anhydrous ethanol as a medium, adding PVA, carrying out ball milling, drying a slurry obtained after ball milling, carrying out compacting formation, and sintering to obtain steel bonded carbide. The TiC / heatproof steel bonded carbide is prepared in the invention through combining an in situ reaction synthesis technology with a liquid phase sintering technology. TiC is synthesized in situ in a matrix through a reaction in the sintering process, so fine dimension of particles is enhanced, the surface has no closed angles, the matrix interface combination is good, and the interface is clean. The preparation method of the steel bonded carbide has the advantages of improvement of the comprehensive and mechanical performances of the carbide, low price, and simple process.

The invention relates to a method for preparing TiC medium alloy cold-working die steel-based steel-bonded hard alloy, comprising the following steps: weighing titanium carbide powder and medium-alloy cold-working die steel matrix powder according to the proportion, and putting the alloy powder into a ball mill Mixing and crushing are carried out, wherein anhydrous ethanol is added as a process control agent, after ball milling, the wet mixed powder is put into a vacuum drying oven for drying, and it is used for later use after drying. Add organic monomers and initiators to the solvent to prepare a premix; add additives to improve the fluidity and dispersibility of the slurry; add catalysts and pH regulators and stir evenly to obtain a slurry; inject the slurry into the casting mold and vacuumize Or vibration degassing, after the slurry is solidified and formed, the green body is put into a vacuum drying oven for drying, and the dried green body is degummed and sintered in a vacuum sintering furnace to prepare a steel-bonded hard alloy. On the basis of ensuring the macroscopic properties of the steel-bonded hard alloy, the invention has the advantages of simple process, low cost and easy preparation of parts with large size and complex shape.

The invention relates to a preparation method for high strength and toughness modified high manganese steel based TiN steel bonded cemented carbide. The preparation method is characterized in that in-situ synthesis TiN powder is prepared, wherein one or three of TiO2 powder, TiH2 powder and Ti powder and urea ((NH2)2CO) are prepared into the in-situ synthesis TiN mixed powder according to the N / Ti atomic ratio being 0.4-1.1; molybdenum iron powder, vanadium iron powder, chrome iron powder, ferromanganese powder, ferrosilicon powder, iron powder, nickel powder, colloidal graphite and rare earth raw materials are prepared according to the required mass ratio of bonding-phase metal chemical compositions, the raw materials are put into a steel ball for ball milling, anhydrous ethanol are added to serve as a medium and PVA, slurry obtained after ball milling is dried to be pressed and formed, sintering is conducted, and the TiN steel bonded cemented carbide is obtained. According to the preparation method, an in-situ reaction synthesis technology is combined with a liquid-phase sintering technology, strengthening particles are wee in size, the surfaces of the particles are free of sharp corners, the base body interface bonding is good, and the interface is clean. By means of the preparation method for the steel bonded cemented carbide, the comprehensive mechanical performance of the cemented carbide can be improved, the cost is low, and the process is simple and convenient to implement.