588 results about "Tungsten alloy" patented technology

The invention belongs to the technical field of powder metallurgy, and particularly relates to a high-strength tungsten alloy wire and a preparation method thereof, lanthanum oxide is uniformly doped through a ball-milling mixing and microwave sintering method, the recrystallization temperature of tungsten crystal grains is reduced by coordinating logarithmic strain of a rotary hammer, an annealing process and the like, the tungsten crystal grains uniformly grow, and the high-strength tungsten alloy wire is prepared. The wire diameter of the high-strength tungsten alloy wire is smaller than 30 microns, the tensile strength of the high-strength tungsten alloy wire is larger than or equal to 6200 MPa, and the percent of pass of the high-strength tungsten alloy wire is larger than or equal to 80%.

The invention relates to the technical field of tungsten alloy, and discloses a tungsten alloy material and a preparation method thereof.The tungsten alloy material comprises, by mass, 90-100 parts of modified tungsten powder, 8-10 parts of nickel powder, 5-7 parts of iron powder, 4-6 parts of cobalt powder and 1-3 parts of modified carbon fibers. The nickel powder, the iron powder and the cobalt powder in the molten state permeate into the tungsten powder through pores evenly distributed in porous carbon on the surface of the modified tungsten powder to form a uniform and compact alloy material, and the situation that due to the large melting point difference between the tungsten powder and the nickel powder, the iron powder and the cobalt powder, the nickel powder, the iron powder and the cobalt powder are distributed unevenly in the tungsten alloy material, and the mechanical strength of the alloy material is reduced is avoided; the pretreated silicon carbide whiskers are adhered to the surface of the carbon fiber loaded with the graphene oxide to form modified carbon fiber, so that interface stress can be absorbed and dispersed, stress concentration is reduced, cracks and debonding phenomena at an interface are prevented, and the mechanical performance of the tungsten alloy material is enhanced.

The invention discloses a tungsten alloy material containing a silicon carbide reinforced Al2O3-SiO2-based multiphase ceramic coating and a preparation method of the tungsten alloy material, and belongs to the field of ceramic material preparation. The method comprises the following steps: ball-milling and mixing powder raw materials containing modified silicon carbide, aluminum oxide, silicon dioxide and lead oxide with a solvent, and defoaming to obtain ceramic slurry; the ceramic slurry is brushed on the surface of a tungsten alloy matrix subjected to surface pretreatment, and after drying, vacuum sintering is performed to obtain the tungsten alloy. The compact silicon carbide reinforced Al2O3-SiO2-based multiphase ceramic coating is introduced to the surface of a tungsten alloy matrix, the hardness, the high-temperature oxidation resistance and the high-temperature carburization resistance of a tungsten alloy material are remarkably improved, the stability of the coating can be improved through the silicon carbide distributed in a dispersed point shape, the thermal expansion coefficient of the coating is evenly reduced, and the hardness, the high-temperature oxidation resistance and the high-temperature carburization resistance of the tungsten alloy material are improved. The thermal expansion coefficient difference value between the multiphase ceramic coating and a tungsten alloy matrix is reduced, and the thermal shock resistance of the coating is improved.

The invention relates to the field of high-temperature anti-oxidation coatings, in particular to a tantalum-tungsten alloy surface high-temperature anti-oxidation composite coating and a preparation method thereof.The coating is composed of two layers of coatings with different components, the thermal expansion coefficients of the coatings and a base body are matched, the thermal expansion coefficients of the coatings are matched, and residual stress and thermal stress are reduced. The coating is prepared by adopting an embedding boriding and slurry melting method, and the used material components comprise ZrB2, MoSi2, 8YSZ, B, La2O3, Al2O3, NaF, TaSi2 and the like. The preparation method specifically comprises the following steps: putting a substrate into embedding powder for boronizing treatment, then mixing a coating material with ethanol and a binder, putting the mixture into a ball mill for wet mixing to prepare coating slurry, spraying the coating slurry on the surface of the substrate, and putting the substrate into a vacuum tube furnace for sintering to prepare a coating, thereby obtaining the high-temperature anti-oxidation composite coating. The binding force between the developed coating and the tantalum-tungsten alloy matrix is strong, and the tantalum-tungsten alloy matrix can be protected from oxidation corrosion or the oxidation rate can be slowed down within 500-2500s at the high temperature (2000 DEG C or above).

The invention discloses a rare earth modified tungsten carbide alloy and a preparation method thereof, and belongs to the technical field of tungsten carbide alloys. The rare earth modified tungsten carbide alloy comprises 80 wt.%-90 wt.% of a hard phase and 10 wt.%-20 wt.% of a matrix, and the hard phase is uniformly distributed in the matrix; the hard phase comprises a rare earth modified tungsten carbide inner core, the rare earth modified tungsten carbide inner core is coated with a nano tungsten carbide shell, the rare earth modified tungsten carbide inner core accounts for 85-95 wt.% of the mass of the hard phase, and the nano tungsten carbide shell accounts for 5-15 wt.% of the mass of the hard phase. By the adoption of the rare earth modified tungsten carbide alloy and the preparation method thereof, the problem that an existing tungsten carbide alloy is poor in hardness and abrasion resistance can be solved, and the toughness of the tungsten carbide alloy can be improved.

The present application relates to the technical field of tungsten alloy materials, and in particular to a tungsten alloy wire, a preparation method therefor, and a use thereof in cutting of a semiconductor material. The tungsten alloy is composed of the following elements in percentage by mass: 0.4-1.1 wt% of L, 0.001-0.25 wt% of Z, and the balance of tungsten and inevitable impurities, wherein L is one or more than two of lanthanum, cerium, praseodymium, neodymium, gadolinium and erbium, and Z comprises oxygen and carbon. The wire diameter of the wire is 20-60 μm, the wire contains linear L or a compound of L along the wire axis direction, and the radial average width D of L or the compound of L is smaller than or equal to 5 nm. According to the present application, the linear L element is doped between tungsten base bodies, and the radial average width of L is controlled to be smaller than or equal to 5 nm, so that the wire has the tensile strength of 5000 MPa or above under the wire diameter of 20-60 μm, and the machining performance of the tungsten alloy wire is enhanced.

The invention provides a preparation method of niobium-tungsten alloy spherical powder. The preparation method comprises the following steps: S1, proportioning and mixing: mixing raw material powder such as niobium powder, tungsten powder, molybdenum powder and zirconium carbide powder into mixed powder according to a proportioning table; s2, pressing and sintering, wherein the mixed powder is pressed into blocks in a mold through pressing equipment, and then the blocks are sintered into blanks in a vacuum state; s3, pulverizing and screening: pulverizing and screening the blank to obtain non-spherical powder with a proper particle size range; and S4, spheroidizing: spheroidizing the non-spherical powder to obtain spherical powder. According to the niobium-tungsten alloy spherical powder prepared through the method, the particle size range of the powder is 15-60 microns, the powder spheroidization rate is larger than or equal to 90%, the powder oxygen content is smaller than or equal to 150 ppm, and the Hall flowability is larger than or equal to 8.0 s / 50 g; the powder prepared by the process is low in oxygen content, appropriate in powder size distribution range and high in fine powder yield, the process flow is short, and a production line is convenient to build.

The present invention relates to the technical field of tungsten alloy materials, and in particular to a tungsten alloy wire, and a preparation method therefor and a use thereof. The tungsten alloy is composed of the following elements in percentage by mass: 0.45-0.9 wt% of L, 0.05-0.2 wt% of oxygen, and the balance being tungsten and inevitable impurities, wherein L is one or more of lanthanum, cerium, praseodymium, neodymium, gadolinium, and samarium, the wire has a wire diameter of 20-60 μm, in the wire, L or compounds of L exist in the axial direction of the wire in a linear shape, and the average width D of L or the compounds of L in the radial direction is less than or equal to 5 nm. The element L is controlled to be doped between the tungsten base materials in a linear shape, and the average width D of L in the radial direction to be less than or equal to 5 nm, so that cracks and wire breakage caused by second-phase particles in the subsequent pressure machining process are greatly reduced, thereby guaranteeing the mechanical strength of the tungsten alloy wire, and thus the wire has a tensile strength of 5000 MPa or above under a wire diameter of 20-60 μm, and the machining performance of the tungsten alloy wire is enhanced.

The invention relates to the technical field of anti-oxidation coatings, and particularly discloses a tantalum-tungsten alloy anti-oxidation coating and a preparation process thereof. The tantalum-tungsten alloy anti-oxidation coating comprises a transition layer, an inner layer, a barrier layer and an outer layer which are stacked in sequence, the transition layer is prepared from the following raw materials: an Ir target, a Ta target and an Re target are adopted for co-sputtering; the inner layer is prepared from the following raw materials in parts by mass: Si, MoSi2, Y and Ta-W alloy powder; the barrier layer is prepared from the following raw materials in parts by mass: Al2O3, Yb2O3 and 3YZrO2; the outer layer is prepared from the following raw materials in parts by mass: a compound: Yb2O3, La2O3, Gd2O3, SiC and B4C; and the multi-element borides comprise ZrB2 and HfB2. The tantalum-tungsten alloy anti-oxidation coating prepared in the invention has relatively good high-temperature oxidation resistance.

The invention discloses a tantalum-tungsten alloy surface layer thickness ratio gradient structure coating and a preparation method thereof, and belongs to the technical field of ultrahigh-temperature anti-oxidation coating preparation. A tantalum-tungsten alloy is used as a substrate, and the surface coating of the tantalum-tungsten alloy is prepared through the following steps: (1) solid-phase embedding boronizing; (2) a ZrB2-MoSi2-ZrSi2 layer is prepared through the combination of slurry fusion sintering and a solid infiltration method; and (3) the ZrB2-TaSi2-Zr6Ta2O17 composite coating slurry is prepared in a sintering mode. The total thickness of the prepared coating ranges from 120 micrometers to 200 micrometers, the thicknesses of all the layers are in an exponential gradient relation: tn = t1 * Kn-1 (t0 = 1, K = 1.2-1.3), the problems of uneven thermal stress distribution between the tantalum-tungsten alloy substrate and the coating and between the layers of the coating and ultra-high-temperature anti-oxidation protection of the tantalum-tungsten alloy are successfully solved, the prepared coating is good in binding force and free of defects such as holes and cracks, and the service life of the coating is prolonged. And the tantalum-tungsten alloy can keep a good anti-oxidation effect for a short time under the extreme high-temperature condition of 2000 DEG C.

The invention discloses a high-wear-resistance tungsten carbide alloy and a preparation method thereof, and belongs to the technical field of tungsten carbide alloys. According to the high-wear-resistance tungsten carbide alloy, spherical hard particles are evenly distributed in a matrix, the mass percent of the hard particles is 80 wt.%-90 wt.%, and the mass percent of the matrix is 10 wt.%-20 wt.%; the hard particles comprise the following components in percentage by mass: 75 to 80 weight percent of composite tungsten carbide particles, 5 to 10 weight percent of cobalt powder, 2 to 3 weight percent of titanium powder, 2 to 3 weight percent of zirconium powder, 0.5 to 1 weight percent of rare earth oxide and 5 to 10 weight percent of nano carbon black. By adopting the wear-resistant tungsten carbide alloy and the preparation method thereof, the problem that the wear resistance of the tungsten carbide alloy is affected due to the fact that the hardness and the toughness of the existing tungsten carbide alloy cannot be synergistically enhanced can be solved.

The invention discloses a niobium-titanium-tungsten alloy based on 3D printing, a gradient material of the niobium-titanium-tungsten alloy and a preparation method of the niobium-titanium-tungsten alloy. Mixed powder is used as a raw material, and short-process and low-cost preparation of the niobium-titanium-tungsten alloy can be achieved through multiple additive manufacturing methods. By utilizing the ratio of the pre-alloyed powder with different impurity contents, the performance of the niobium-titanium-tungsten alloy can be effectively regulated and controlled through various additive manufacturing methods; a niobium-titanium alloy coating is cladded on the surface of the niobium-titanium-tungsten alloy to form a gradient material, and the corrosion resistance of the niobium-titanium-tungsten alloy can be improved on the premise that the performance of a niobium-titanium-tungsten matrix is not obviously changed.

The invention relates to an integrated machining method for a niobium-tungsten alloy composite surface variable-wall-thickness thin-wall part, and belongs to the field of metal plate forming. Determining the size of a niobium-tungsten alloy plate according to the size of the composite surface; groove milling is conducted on the spinning clamping position of the niobium-tungsten alloy plate; the machined plate is arranged on a spinning tire, and a tail top is used for clamping and fixing; the variable wall thickness forming of the curved generatrix part is realized by adopting strong shearing spinning and common spinning deep drawing spinning; the equal-wall-thickness forming of the cylindrical part is realized by adopting multi-pass deep drawing and spinning; the tiny allowance of the outer wall is removed through precise turning cutting, and it is guaranteed that the wall thickness meets the product use requirement; polishing the inner and outer surfaces to reduce the surface roughness; the niobium-tungsten alloy plate is used for forming, the material utilization rate is increased, split connection weld joints are reduced through a highly-integrated forming method, and the structural reliability is improved.

The invention relates to an ultrafine high-strength multi-component composite reinforced tungsten filament and a preparation method thereof, the tungsten filament comprises W, rare earth oxide (any one of La2O3, Y2O3 and CeO2) and alloy elements (Al, Si, K and Zr), the content of the rare earth oxide in the tungsten filament is 0.1-1.0 wt%, and the content of Al in the alloy elements is 0.025-0.05 wt%, the content of Si is 0.1-0.2 wt%, the content of K is 0.28-0.56 wt%, the content of Zr is 0.1-0.5 wt%, and the balance is W. The wire diameter of the tungsten filament is 28-30 [mu] m; the tensile strength of the tungsten filament is more than 7100 MPa, and the length of a single tungsten filament is more than 150 thousand meters. According to the tungsten wire, through multi-phase composite doping, the purpose of synergistic strengthening such as nano-particle dispersion strengthening, fine grain strengthening and grain boundary strengthening is achieved, and the superfine high-strength tungsten alloy wire with good toughness can be obtained.

The invention discloses a tungsten alloy wire which is composed of a tungsten alloy bus and a self-lubricating composite coating, and the self-lubricating composite coating sequentially comprises a pre-coating and a composite coating from inside to outside. The method has the beneficial effects that on one hand, the tungsten alloy bus is subjected to etching treatment through concentrated hydrochloric acid or hydrofluoric acid, and meanwhile, the pre-plating layer is added, so that the binding force between the electroplated layer and the tungsten alloy wire is enhanced; meanwhile, the lubricating composite coating is prepared by adding solid lubricating particles into the electroplating liquid for composite electroplating, so that the die loss in the drawing process is effectively reduced, and the cost is saved; and on the other hand, a nickel aminosulfonate pre-plating process is changed, and impact nickel is used as a pre-plating bottom layer of the diamond wire, so that the binding force of the grinding composite coating and the diamond wire bus is improved, and the problems of wire breakage or silicon wafer scratching and the like caused by falling of the grinding composite coating in the cutting process of the diamond wire can be prevented.

The invention discloses a preparation method of niobium-tungsten alloy spherical powder and a 3D printing method of the niobium-tungsten alloy spherical powder, and belongs to the technical field of refractory metal material preparation.The preparation method comprises the steps that niobium, tungsten, molybdenum and zirconium refractory metal raw materials are smelted to obtain cast ingots with uniform components, and hydride powder is formed after hydrotreating and mechanical crushing; spherical powder is prepared by adopting a plasma spheroidizing technology, then dehydrogenation is performed for 1-3 hours at the temperature of 450-750 DEG C, magnesium powder is added, treatment is performed for 2-5 hours in an inert atmosphere at the temperature of 800-1100 DEG C, and finally the low-oxygen niobium-tungsten alloy spherical powder with the oxygen content lower than 120 ppm is obtained. Compared with a traditional process, the spheroidizing treatment is innovatively carried out before the dehydrogenation and oxygen reduction process, the deoxidation efficiency is improved through the relatively small specific surface area of spherical powder, and oxygen content control is achieved in combination with magnesium powder heat treatment. The problems of high oxygen content and low powder yield in a traditional process are solved, and material support is provided for high-performance niobium-tungsten alloy components in the fields of aerospace, nuclear power and the like.

The invention relates to the technical field of tungsten alloy materials, in particular to a tungsten alloy wire, a preparation method thereof and application of the tungsten alloy wire in semiconductor material cutting, and tungsten alloy is composed of the following elements of, by mass, 0.4-1.1 wt% of L, 0.001-0.25 wt% of Z and the balance tungsten and inevitable impurities. Wherein L is one or more than two of lanthanum, cerium, praseodymium, neodymium, gadolinium and erbium; z comprises oxygen and boron; the wire rod has a wire diameter of 20-60 [mu] m, the wire rod has a linear L or L compound in the axial direction, and the radial average width D of the L or L compound is less than or equal to 5 nm. The linear element L is doped between the tungsten matrixes, and the radial average width of the element L is controlled to be smaller than or equal to 5 nm, so that the wire has the tensile strength of 5000 MPa or above under the wire diameter of 20-60 microns, and the machining performance of the tungsten alloy wire is enhanced.

The invention relates to the field of preparation of composite materials, in particular to a preparation method of a high-strength, high-energy-absorption and high-impact-resistance copper-tungsten composite material, which is suitable for preparing a copper-tungsten composite material with a three-dimensional interpenetrating characteristic. The method comprises the following steps: preparing a tungsten or tungsten alloy porous material; carrying out hot isostatic pressing sintering on the tungsten or tungsten alloy porous material and copper powder to prepare a copper-tungsten composite material; the composite material is formed by compositing a tungsten or tungsten alloy porous material with the porosity of 50-95% printed through an additive manufacturing technology and copper, and all composition phases are kept in respective communication and interspersed in a three-dimensional space. When the temperature is 20-500 DEG C, the compressive strength of the composite material reaches 678MPa, the absorption energy reaches 196MJ / m < 3 >, and the absorption energy is improved by more than 200% compared with that of tungsten and tungsten alloy frameworks. The method is simple in process step and low in production cost, and has good application prospects in the fields of national defense, aerospace, automobiles, energy and the like.

The invention provides an improved tungsten alloy sintering process which comprises the following steps: (1) weighing the following components in parts by mass: 92-95 parts of W, 4-8 parts of Ni, 3-6 parts of Fe, 1.2-1.6 parts of Cr, 0.3-0.8 part of Co and 1.4-1.9 parts of modified lanthanum trioxide; (2) mixing the components in the step (1), and carrying out ultrasonic dispersion treatment in a treatment modification liquid; (3) washing with water, drying, and performing cold isostatic pressing to obtain a blank; (4) feeding the blank into a sintering furnace for sintering, and cooling for later use after sintering is finished; (5) the temperature is increased to 550-650 DEG C, rotary forging machining is conducted, then the temperature is reduced to 300-350 DEG C, and heat preservation is conducted for 10-20 min; and water-cooling to room temperature, and drying to obtain the tungsten alloy. The tungsten alloy is excellent in comprehensive performance and has wide market prospects.

The invention discloses a 10KV sulfur hexafluoride switch cabinet which comprises a cabinet body, a gas box is arranged in the cabinet body, a mechanism chamber is arranged on the gas box, an electric control chamber is arranged on the mechanism chamber, an operating mechanism is arranged in the mechanism chamber, a three-phase high-voltage switch assembly is arranged in the gas box, and the three-phase high-voltage switch assembly is connected with the operating mechanism. A wire inlet sleeve and a wire outlet sleeve which are matched with each phase of high-voltage switch assembly are arranged on the gas box, the wire inlet sleeve is arranged on the gas box in an inverted mode, a first cylindrical contact is fixedly arranged in the wire inlet sleeve in a sleeved mode, copper-tungsten alloy of a spiral structure is embedded in the inner circumferential wall of the first cylindrical contact, a copper wire inlet rod is vertically inserted in the first cylindrical contact, and a wire outlet rod is arranged on the wire inlet sleeve. A heat dissipation box is arranged at the upper end of the gas box, a pressure relief device is arranged at the upper end of the heat dissipation box, the heat dissipation box and the gas box are internally communicated to form a closed cavity, the closed cavity is filled with sulfur hexafluoride gas, an inflation and measurement integrated pressure gauge is mounted on the gas box, and heat dissipation fins are paved on the outer surfaces of the gas box and the heat dissipation box. The heating value can be reduced, efficient heat dissipation is achieved, and the reliability of the switch cabinet is improved.

The invention provides a graphene reinforced copper-tungsten alloy material, a preparation method, an electrical contact and application. The preparation method comprises the steps that raw materials are prepared, specifically, tungsten powder, first graphene powder and first copper powder are weighed to prepare a plurality of grades of tungsten framework mixtures according to different proportions, and copper paste prepared by mixing second copper powder and second graphene powder according to a set proportion is weighed; molding and compounding treatment: sequentially loading the tungsten skeleton mixtures of multiple grades into a mold, carrying out layered cold pressing to obtain a preformed blank, and carrying out hot-pressing compounding treatment on the preformed blank in a protective atmosphere to obtain a tungsten skeleton pressed blank; infiltrating treatment: injecting copper slurry into the tungsten skeleton pressed blank, and carrying out vacuum infiltrating to obtain an infiltrated alloy body; and densification treatment is conducted, specifically, the infiltrated alloy body is placed in the protective atmosphere to be subjected to hot pressing treatment, and the graphene reinforced copper-tungsten alloy material is obtained. The mechanical property, the conductivity, the frictional wear resistance and the arc ablation resistance of the tungsten alloy material are synergistically improved, so that the material has excellent comprehensive performance.

The invention discloses an extrusion mold manufacturing method based on D2 tool steel, and belongs to the technical field of extrusion mold manufacturing, and the extrusion mold manufacturing method comprises the following steps: preparing D2 mold steel powder; d2 die steel powder and nickel-based tungsten carbide alloy powder are mixed according to the ratio of 90: 10; forming a mold blank by using a laser metal printer; the mold blank is put into a hot isostatic pressing furnace, heat preservation is conducted for 1-2 h at the temperature of 950-1000 DEG C and the pressure of 100-110 MPa, and cooling is conducted; then carrying out polishing, cleaning and drying treatment; and preparing an alloy coating on the surface of the mold blank through a laser cladding technology to obtain the mold. In this way, the hardness of the prepared mold is larger than 70, the corrosion rate at 250 DEG C is smaller than 5 cm < 2 >. H <-1 >, the grain size is larger than 10 grades, the wear rate at 400 DEG C is 5.04 * 10 <-5 > mm < 3 >. N <-1 >. M <-1 >, and the mold has good high-temperature corrosion resistance and high-temperature wear resistance.

The invention belongs to the technical field of tungsten alloy, and particularly discloses a tungsten alloy electrode material and a preparation method thereof.The tungsten alloy electrode material comprises, by weight, 0.1%-0.2% of lanthanum boride, 0.2%-0.5% of zirconium oxide, 0.2%-0.6% of boron carbide, 0.4%-0.8% of cerium oxide, 0.5%-1.2% of tantalum carbide, 1.4%-1.8% of modified carbon nanotubes and the balance tungsten powder. The lanthanum boride, the zirconium oxide, the boron carbide, the cerium oxide, the tantalum carbide and the modified carbon nanotubes are added into the tungsten powder, under the combined action of the lanthanum boride, the zirconium oxide, the boron carbide, the cerium oxide, the tantalum carbide and the modified carbon nanotubes, the tensile strength and the electrical conductivity are effectively improved, and the high-temperature stability tungsten powder has excellent high-temperature stability and wide application prospects.

The invention relates to the technical field of tantalum-tungsten alloy surface treatment, in particular to a tantalum-tungsten alloy material with a tantalum carbide infiltrated layer and a preparation method of the tantalum-tungsten alloy material. The tantalum-tungsten alloy material with the tantalum carbide infiltrated layer is prepared through a pulse carburizing method, the tantalum carbide infiltrated layer of the product is combined to the surface of a tantalum-tungsten alloy matrix and comprises a TaC phase and a Ta2C phase, a first infiltrated layer with the Ta2C phase as the main part and the TaC phase as the auxiliary part and a second infiltrated layer with the TaC phase as the main part and the Ta2C phase as the auxiliary part are sequentially arranged on the surface of the matrix, the side, making contact with the matrix, of the first infiltrated layer is in a spine shape, and the other side, making contact with the matrix, of the second infiltrated layer is in a spine shape. The total volume of the TaC phase accounts for 66%-75% of the volume of the infiltrated layer, and the Ta2C phase accounts for 25%-34% of the volume of the infiltrated layer. Through reasonable design and control of components of the infiltrated layer, the wear resistance and hardness of the carbide infiltrated layer are effectively improved, the surface hardness of the carbide infiltrated layer can reach 15 GPa to 45 GPa, and the corrosion rate in high-temperature molten metal cerium is 0.01000 mu m / h to 0.05500 mu m / h.

The invention relates to the technical field of tungsten alloy materials, in particular to a tungsten alloy wire, a preparation method thereof and application of the tungsten alloy wire in semiconductor material cutting, and tungsten alloy is composed of the following elements of, by mass, 0.4-1.1 wt% of L, 0.001-0.25 wt% of Z and the balance tungsten and inevitable impurities. Wherein L is one or more than two of lanthanum, cerium, praseodymium, neodymium, gadolinium and erbium; z comprises oxygen and carbon; the wire rod has a wire diameter of 20-60 [mu] m, the wire rod contains a linear L or L compound in the axial direction, and the average radial width D of the L or L compound is less than or equal to 5 nm. The linear element L is doped between the tungsten matrixes, and the radial average width of the element L is controlled to be smaller than or equal to 5 nm, so that the wire has the tensile strength of 5000 MPa or above under the wire diameter of 20-60 microns, and the machining performance of the tungsten alloy wire is enhanced.

The invention belongs to the technical field of laser cladding materials, and particularly relates to Fe-based titanium carbide-tungsten carbide alloy powder, a laser cladding layer and a preparation method of the laser cladding layer. The Fe-based titanium carbide-tungsten carbide alloy powder provided by the invention comprises TiC powder, WC powder and Fe-based alloy powder, the ratio of the total mass of the TiC powder and the WC powder to the mass of the Fe-based alloy powder is 1: (1-4). According to the invention, TiC powder and WC powder are mixed for use, and hard particles are formed on the surface and the bottom of the coating after laser cladding, so that the coating has dual wear-resistant effects; and meanwhile, the TiC powder with lower price is adopted to replace part of WC powder, so that the production cost can be reduced.

The invention relates to a quality detection device for road construction, which comprises a rack connected to the rear part of a vehicle body through a connecting mechanism, and one side of the rack is provided with a detection mechanism for detecting the ground flatness; the detection mechanism comprises a detection assembly and an amplification assembly; the invention relates to the technical field of road construction. According to the quality detection device for road construction, through a mechanical-electric control coupling design (lever amplification and high-precision rheostat), a dynamic self-adaptive counterweight (tungsten alloy ring rapid adjustment), multi-stage buffer vibration suppression (nitrogen cylinder and all-steel rack) and two-parameter integrated detection (flatness / hardness synchronization), the quality of the road construction is detected; the comprehensive error of road quality detection is reduced from + / -15% of traditional equipment to + / -2.5%, the detection efficiency is improved by more than three times, and the method is suitable for construction quality control of severe scenes such as high-grade highways and airport runways.

The present invention relates to the technical field of tungsten alloy materials, and particularly relates to a tungsten alloy wire and a preparation method and application thereof. In terms of mass fraction, the components of the tungsten alloy include: 0.3-0.75 wt% of element L, 0.001-0.18% of oxygen element, and the balance is tungsten element and inevitable impurities; wherein, L is one or more of lanthanum, cerium, praseodymium, neodymium, gadolinium, and erbium; the wire diameter of the wire is 0.3-0.6 mm; and in the wire, the average radial width of the tungsten fibers is ≤0.4 μm; the number of cracks per 100 meters of flaw detection on the surface of the wire is ≤5. The tungsten alloy wire provided by the present invention has finer internal tungsten fibers, the tungsten fibers are effectively strengthened and the density is improved, and the flaw detection number on the surface of the tungsten alloy wire is small; the effective strengthening of the internal tungsten fibers and the improvement of the density enable the medium-temperature breaking force, medium-temperature creep resistance and winding performance of the wire to be improved; therefore, when it is used as a tungsten wire rope for pulling single crystal silicon, both the reliability and the service life are improved.

The present invention discloses a method for preparing a black decorative film for application on plastics, comprising electroplating, cleaning, baking, glow cleaning, and physical vapor deposition (PVD) steps. The PVD process deposits a chromium-tungsten alloy layer on a plastic substrate using medium-frequency magnetron sputtering. Acetylene reaction gas is then introduced and doped with the carbon element in the acetylene reaction gas using medium-frequency magnetron sputtering, thereby forming a CrWC black film. The present invention utilizes a novel alloy target material and medium-frequency magnetron sputtering to deposit the CrWC film on the surface of the plastic substrate. This method eliminates the need for workpiece heating and utilizes a staged sputtering process to deposit the alloy target, resulting in a more stable black decorative film.

The invention provides a high-temperature-resistant creep-resistant tungsten alloy, and relates to the technical field of powder metallurgy, the tungsten alloy comprises, by mass, 3-8 wt% of Re, 0.2-1 wt% of carbide, 0.1-0.5 wt% of boride, and the balance tungsten and inevitable impurities; the carbide is selected from one or more of TiC, ZrC, TaC and HfC; the boride is selected from one or more of TiB2 (titanium diboride), HfB2 (hafnium diboride) and ZrB2 (zirconium diboride). The high-temperature-resistant creep-resistant tungsten alloy is prepared by adding low-content rhenium, carbide and boride into pure tungsten and adopting a unique preparation method, and the technical defects that an existing tungsten-rhenium alloy is insufficient in strength and creep resistance at the ultrahigh temperature (larger than or equal to 2000 DEG C), and a traditional multi-pass processing technology is complex are overcome.