338 results about "Mo element" patented technology

The invention provides a novel high-temperature Ti alloy with high heat resistance and high heat stability. The alloy contains eutectic Nb, Ta and Mo elements. Based on the appropriate proportion of these three elements, the alloy is superior in high resistance and stability to heat and good antioxidant effect. The alloy contains (by weight) Al 5.0-6.3 percent, Sn 3.0-5.0 percent, Zr 2.5-7.0 percent, Mo 0.2-1.5 percent, Si 0.20-0.55 percent, Nb 0.2-1.0 percent, Ta 0.2-3.0 percent, C 0.01-0.09 percent, and Ti and other inevitable impurities in balance. The alloy is an ideal alternative material for high-temperature parts of aircraft engine, such as wheel disk, drum barrel, barrel shaft and blade.

The invention relates to a high entropy alloy material and a preparation method thereof, the high entropy alloy composition is TiZrNbVMo[x], wherein x is the molar ratio with a value range of x = 0 ~ 1.0. The preparation method comprises the following steps: using a mechanical method to remove oxide skin of metallurgical raw materials of Ti, Zr, Nb, V and Mo elements, then accurately weighing according to the molar ratio; respectively melting intermediate alloys of MoTi and TiZrNbV in a non self-consumable vacuum electric-arc furnace or a cold crucible suspension furnace, finally putting the intermediate alloys together to melt into target alloys, melting each alloy for more than 3 times to ensure uniformity of the composition; taking a specific mass of a master alloy to preparing a rod or plate sample by use of vacuum suction casting or pouring equipment. Compared with traditional crystal materials, the high entropy alloy disclosed by the invention exhibits high hardness, yield strength and fracture strength, and compared with other high-strength body-core-structure high entropy alloys, the high entropy alloy disclosed by the invention has better plastic deformation ability.

The invention discloses an electronic packaging material. The electronic packaging material is characterized by comprising a matrix and a reinforcement, wherein the matrix is made of aluminum, copper, aluminum alloy or copper alloy, the reinforcement is of graphene accounting for 0.5-30% of total mass percentage, and the graphene has 1-20 layers of tiny plates the area of each which is 1-5000 mu m<2> or plates the area of each which is more than 1mm<2>; and the aluminum or copper metal comprises Cr, Fe, Ti, W, B or Mo element, the content of the Cr, Fe, Ti, W, B or Mo element is 0.05-1%. The electronic packaging material has the advantages of being high-heat conductivity, high-strength, low-density, environment-friendly and good in machineable property; and as the electronic packaging material, the composite has excellent property and good application prospects.

The invention relates to a technology for steel making by directly alloying molybdenum oxide. The technology is characterized in that the smelting process comprises the following steps of a. adding a molybdenum oxide raw material to a container or a smelting furnace which is unfilled with or partially filled with molten steel or iron liquid, then continuously filling the molten steel or iron liquid, and mixing the molybdenum oxide raw material in the molten steel or iron liquid for certain time; b. after the molten steel or iron liquid stands still in the container or the smelting furnace, adding a certain amount of reducing agent to the surface of the molten steel or iron liquid and a slag surface; and c. after the content of a molybdenum element in the molten steel or iron liquid stabilizes in a smelting later period, adding molybdenum-containing alloy so as to adjust the components of the molten steel or iron liquid. The technology has the characteristics that the molybdenum alloying smelting process is simple to operate, the yield of the molybdenum alloy element is high, the alloying smelting time is short, the consumption of smelting energy sources is low and the smelting cost is low; and equipment has wide adaptation and can be applied to the smelting of steel with the molybdenum content of 0.001-15%.

The invention designs a composite material. The composite material comprises carbon-fiber perform, matrix carbon, filler and diamond-like carbon, wherein the matrix carbon is uniformly adhered on the carbon fiber of the perform to form the carbon-fiber perform with the matrix carbon; the filler fills the inside of the carbon-fiber perform with the matrix carbon and coats the outside of the carbon-fiber perform with the matrix carbon to form a semifinished product; the diamond-like carbon comprises a diamond-like carbon layer coated on the semifinished product; and the filler contains a Ti element, a Si element, a C element and a Mo element. The composite material has the advantages that a method of combining four processes of CVI, SI, RMI and PECVD to prepare a finished product with the advantages of high compactness, low thermal expansion coefficient and friction coefficient, high self-lubricating property, high thermal conductivity, oxidation resistance, thermal shock resistance, ablation resistance, wear resistance, high strength and toughness and the like; and simultaneously, the process is simple, the preparation period is short, the equipment requirement is low, the cost is low, net shaping can be realized and convenience is brought for large-scale industrial application.

A powder metallurgy method for producing titanium alloy products with high density and a complicated shape by using Ti powder and additive powder containing Al, V, Fe, and Mo elements as raw materials, comprising mixing the Ti powder with a certain granularity proportion and the additive powder with a certain component range evenly, preparing powder green bodies by using a cold press forming method, using a multi-stage heating technique giving priority to middle-low temperature quick heating and high temperature slow heating during sinter process, performing quenching immediately after the heating process is completed, thereby prepares the Ti alloy sintering blank, and the titanium alloy products with high density and a complicated shape are finally produced by forge work and subsequent anneal process. Since the powder metallurgy technique has the characteristics of near net shape and easily control components, alloying is realized easily. At the same time, the high-usage of raw material is provided, the raw material cost and processing cost are saved, and the production energy consumption is reduced greatly. The method is suitable for producing titanium alloy products with high density and a complicated shape.

The invention discloses low-alloy high-intensity high-toughness steel and a production method of low-alloy high-intensity high-toughness steel. The method comprises the following work procedures of: the casting work procedure: the casting is carried out according to the following ingredients and contents to obtain low-alloy steel cast ingots: 0.15 to 0.30 weight percent of C elements, 0.30 to 0.70 weight percent of Si elements, 0.60 to 1.00 weight percent of Mn elements, 0.60 to 1.10 weight percent of Cr elements, 0.50 to 1.00 weight percent of Ni elements, 0.20 to 0.60 weight percent of Mo elements and the balance Fe and unavoidable impurities; the forging work procedure: the low-alloy steel cast ingots are forged, in addition, the blank opening forging heating temperature is 1160 DEG C to 1200 DEG C, the final forging temperature is 650 DEG C to 900 DEG C, and the deformation in each firing time is not smaller than 30 percent; and the heat treatment work procedure: the temperature of the forged and formed forgings is raised to 900 to 940 DEG C to be subjected to normalizing, the temperature is raised to 880 to 920 DEG C for carrying out quenching after the normalizing treatment, the temperature is raised to 530 to 600 DEG C for carrying out high-temperature tempering after the quenching treatment, and the low-alloy high-intensity high-toughness steel is obtained. In the embodiment of the invention, the low-alloy high-intensity high-toughness steel has high intensity and high toughness.

The invention provides a sintered NdFeB rare-earth permanent magnet material with modified grain boundary phase and a preparation method thereof. The material refers to the R-Fe-M-B-based rare-earth permanent magnet of ROF compound with ordered fcc structure in the grain boundary phase, wherein R is one or more of rare earth element Nd, Pr, Dy, Tb and Y, and M is one or more of Al, Cu, Ga, Nb, Mg, Si and Mo elements. The major elements of the grain boundary phase are R, O and F elements, and the ratio of R to O and F is approximately equal to 1:1:1 (atomic percent). The preparation method is that the temperatures and cooling rates of sintering and second tempering are controlled to ensure that the F atoms in the added fluoride which can fuse with the grain boundary rich-R phase of the NdFeB magnet and the O atoms in the grain boundary phase can be in ordered arrangement to form an ordered fcc grain boundary phase. The ordered fcc grain boundary phase has better demagnetizing and coupling functions, thus facilitating to increase the coercive force of the magnet and furthest reducing the dosages of Dy and Tb.

The invention discloses a cast-rolling method for restraining a Cr element and a Mo element of super-austenitic stainless steel from center segregation and belongs to the technical field of manufacturing of the super-austenitic stainless steel. The method includes the steps that (1) raw materials are weighed according to the composition proportion of the super-austenitic stainless steel, and the raw materials are subjected to heat preservation at the temperature ranging from 150 DEG C to 250 DEG C for 100 minutes to 150 minutes; (2) the raw materials are sorted and placed into a vacuum induction melting furnace step by step to obtain molten steel by being smelted; and (3) the molten steel is poured into a dual-roll thin strip cast-rolling machine for cast rolling under shielding of high-purity nitrogen, and a thin super-austenitic stainless steel strip 2.0-3.0 mm thick is obtained, wherein the pouring temperature ranges from 1450 DEG C to 1550 DEG C, the cast-rolling speed ranges from 10 m/min to 40 m/min, and the cast-rolling force ranges from 30 kN to 70 kN. According to the manufactured thin super-austenitic stainless steel strip, center segregation of the Cr element and the Mo element is restrained, and on the premise of maintaining the plasticity, the yield strength is improved by 5%-10% compared with that of traditional strip steel of the same specification as the thin super-austenitic stainless steel strip. Meanwhile, the cast-rolling method reduces energy consumption and production cost, improves the utilization rate of materials and reduces environmental pollution.

The invention discloses a high-entropy alloy with a banded precipitated phase. The high-entropy alloy consists of Co, Cr, Ni and Mo elements, wherein the atomic percent of Co is 25-35%, the atomic percent of Cr is 25-35%, the atomic percent of Ni is 25-35%, the atomic percent of Mo is 5-15%, and the sum of atomic percents of the components is 100%. The phase composition of the high-entropy alloy with the banded precipitated phase comprises a face-centered cubic phase and a sigma precipitated phase, wherein the sigma precipitated phase accounts for 40-60%. In the preparation method, the non-uniform precipitation of the Mo-rich phase is achieved through the combination of hot processing, solid solution processing, cold processing and annealing process, and the high-entropy alloy with the banded precipitated phase is obtained. The alloy can ensure excellent strength and toughness matching, and has application prospects in the fields of cutter materials, aerospace materials and the like.

The invention discloses a contact fatigue-highly resistant cold-rolling intermediate roller and a manufacture method thereof, the roller comprises the following components by weight percentage: 0.70-0.85% of C, 0.40-1.00 of Si, 0.20-0.60% of Mn, 2.80-3.50% of Cr, 0.25-0.60% of Ni, 0.30-0.50% of Mo, 0.10-0.30% of V, less than or equal to 0.02 of P; less than or equal to 0.015 of S, and the balance of Fe and inevitable impurities. The manufacture method comprises the following steps: smelting in an electric furnace, refining outside the electric furnace, degassing under vacuum, casting an electrode bar, remelting electroslag, forging, annealing and performing heat treatment, roughly machining, tempering and performing heat treatment, semifinishing, performing heat treatment on the roller body, finely tempering, and acquiring the finished product roller. By reducing the content of an element C and increasing the content of Si, Ni and Mo elements, strength and toughness performance as well as the matrix strength of the intermediate roller can be increased, and tissue can be refined, and the cold-rolling intermediate roller has high contact fatigue resistance through heat treatment.

The invention discloses a high-strength and high-toughness metastable beta titanium alloy and a preparation method thereof. The Ti-Al-Mo-V-Cr-Zr metastable beta titanium alloy comprises the componentsof, in percentage by weight, 4.5%-5.5% of Al, 6.5%-9.0% of Mo, 1%-4% of V, 1.5%-4% of Cr, 1%-2.5% of Zr and the balance Ti and other inevitable impurities. According to the high-strength and high-toughness metastable beta titanium alloy and the preparation method thereof, after an alloy is subjected to smelting, hot rolling and heat treatment, good matching of strength and plasticity can be obtained; according to the high-strength and high-toughness metastable beta titanium alloy and the preparation method thereof, the content of the V element is further reduced to about 3.5%, and the cheap Cr element is added so that the cost can be reduced to a certain extent; meanwhile, a certain amount of the Cr and Mo elements are added to reinforce a beta matrix, so that the solid solution strengthening effect of the multi-component alloy is improved; and according to the high-strength and high-toughness metastable beta titanium alloy and the preparation method thereof, the yield strength of thealloy is improved to 1518 MPa, meanwhile, and the alloy also has the total elongation at break of 5.3%, so that the requirements of a new generation of high-strength and high-toughness titanium alloyare met.

The invention provides a method for measuring a Mo element in a tungstenic ferro-molybdenum alloy through X-ray fluorescence spectrum analysis. The method comprises the following steps: preparing instrument measurement conditions and samples, selecting standard samples, drawing a working curve, and measuring accuracy and precision. According to the invention, the method has the effects that the arrangement of the series of standard samples to draw the working curve in combination with the calibration of the Mo element and W element can realize the accurate and quick measurement of the Mo element in the tungstenic ferro-molybdenum alloy. According to the former measurement result, the Mo element content in practical production samples is 56.32 percent and is different with 62.31 percent obtained from a chemical humid analysis, with 6 percent deviation, so the analysis result is inaccurate. The method provided by the invention has an accurate and reliable analysis result and meets the enterprises' requirements of being quick and accurate for detection and assay data. Moreover, the method is simple in operation, and good in repeatability, and can accurately and quickly measure the content of the Mo element in the tungstenic ferro-molybdenum alloy. Compared with a chemical analysis which is classical, but is long in period and large in chemical reagent consumption, the method provided by the invention saves the period and the chemical reagent consumption.

The invention discloses a Mo-based nitride composite hard film and a preparation method, wherein the substrate is coated with nanometer composite hard film that is made of Mo-based metal nitride or nonmetal nitride, the crystallized size of the film is 5-40nm, the thickness of the film is 1-5Mum, the molar percentage between the Mo element and the substitution element in the film is 50 to 94% : 6 to 50%; the preparation method is that: (a) the target material (made of Mo and the substitution) and the substrate are respectively arranged on the cathode and sample table in vacuum room of magnetic control sputtering equipment, the area ratio of the Mo and the substitution in the target material is 1 to 8 : 8 to 1, the distance between the target material and the substrate is 40-80mm; (b) after the vacuum degree in the vacuum room is less than or equal to 8 x 10-4pa and substrate temperature reaches 300 to 500 DEG C, the vacuum room is made to be in the atmosphere of argon and nitrogen mixed gas and 30-130 minutes sputtering is made so as to prepare the Mo-based nitride composite hard film. The invention can widely be used for material protection and can improve abradability and durability of material obviously.

The invention relates to grade-90 chain steel. The grade-90 chain steel is prepared from the following chemical components by weight percent: 0.20 to 0.24 percent of C, 0.15 to 0.35 percent of Si, 0.90 to 1.30 percent of Mn, less than or equal to 0.020 percent of P, less than or equal to 0.020 percent of S, less than or equal to 0.20 percent of Cu, 0.40 to 0.55 percent of Ni, 0.45 to 0.65 percentof Cr, less than or equal to 0.10 percent of Mo, 0.025 to 0.050 percent of Alt, and the balance of Fe and unavoidable impurities. Compared with the brand number corresponding to the national standardand European standard, the grade-90 chain steel disclosed by the invention ahs the following advantages: (1) the contents of C and Mn are increased, the cost is slightly increased, and the strength and hardness of the material are greatly improved; (2) the content of Ni is reduced, no Mo element is added, and the cost is greatly reduced; and (3) by reasonably optimizing the alloy elements, on thepremise of ensuring the qualification of breaking strength of the material, the welding performance of the material is also considered, and the cost of raw materials are greatly reduced.

The invention discloses a manufacturing method for nodular cast iron used for a crankshaft. Waste steel, pig iron, coke, melted-down waste iron, tin slag and iron-ore slag are selected as raw materials. The manufacturing method includes the five steps of raw material melting, spheroidizing, primary inoculation, secondary inoculation and pouring. Compared with the prior art, the manufacturing method has the beneficial effects that the silicon content is reduced, the recovery rate can be increased, and the production cost can be reduced; as Sb elements and Re elements are additionally arranged in the nodular cast iron, the abrasion resistance, the corrosion resistance and the tensile strength of the nodular cast iron are improved on the original basis; timely slag raking is carried out after spheroidizing to remove impurities in molten iron, slag raking is carried out again after two times of inoculation are carried out under the corresponding conditions, impurities are reduced, the quality of materials is improved accordingly, and the tenacity of the nodular cast iron is guaranteed; and the content of Nb elements and the content of Mo elements are increased, and as the thermal expansion coefficient of the Nb elements and the thermal expansion coefficient of the Mo elements are small, the heat resistance and the abrasion resistance of the nodular cast iron are improved.

The invention relates to a low-cost medium-strength titanium alloy material and a preparation method thereof. The method comprises the following steps that sponge titanium, Fe chips, Al shots, titanium dioxide and titanium-silicon alloy are weighed and mixed, and the mixture is pressed into electrode blocks; ion welding or vacuum electron beam welding is adopted, and the pressed electrode blocks are welded into strip-shaped electrodes; the prepared strip-shaped electrodes are used as a consumable electrode to be smelted in a vacuum self-consuming electric arc furnace, and a primary ingot is obtained; the primary ingot is inverted and serves as a consumable electrode, then secondary smelting is carried out in a vacuum self-consuming electric arc furnace, and a secondary ingot is obtained; after the secondary ingot is cooled, the secondary ingot is heated, and cogging forging is carried out to obtain a blank; and after the blank is heated, rod materials or plate blanks are obtained through multiple forging. According to the preparation method, the low-cost Fe element is adopted to replace the high-cost V element and Mo element and is used as an alloy reinforcing agent, the manufacturing cost of the alloy can be reduced by 12% to 20%, and the tensile strength of the prepared titanium alloy material, rod materials, plate materials and forged parts ranges from 700 MPa to 950 MPa, and the elongation percentage is 8% to 25%.

The invention provides a 6-8mm high-strength structural steel plate and a manufacture method thereof, aiming at meeting the market requirement for the technology of utilizing thinner steel plates for a concrete pump truck, an aerial ladder and a special vehicle for high-level rescue, and overcoming the shortcomings in the aspect ofdue to the strength, service life and the likeothers of low-level steel. The manufacture method is characterized in that low carbon and manganese contents are is designed; 0.0012% of boron and 0.08% of molybdenum element are added; a converter is utilized for realizing quick smelting; the external refining and degassing refining are performed to improve the purity of molten steel; and rolling, quenching and tempering technologies are carried out to improve the strength and toughness of the steel as well as improve the straightness of the steel plate, in order to obtain a tempered sorbite metallographic structure. The method is short in process, high in efficiency, easy to operate and weld, and low in cost; and the shape and straightness of the plate are controlled to meet the requirements on manufacturing and using of modern pump trucks, high-level aerial ladders, rescue work facilities and other telescopic arm structures.

A Ti-Mo-Ni alloy ingot preparation method is characterized in that Ni-Mo intermediate alloy (the mass proportion content of Mo element is 20-35%) is added, the production steps of the Ti-Mo-Ni alloy ingot include that: titanium sponge, Ni-Mo intermediate alloy or Ti-Mo intermediate alloy are mixed uniformly and pressed into electrode blocks, the electrode blocks are welded into consumable electrodes through welding modes such as plasma arc, and the Ti-Mo-Ni alloy ingot is prepared through twice vacuum consumable electric arc smelting. The Ti-Mo-Ni alloy ingot produced by the preparation method has uniform and stable chemical compositions, has the chemical composition deviation of being less than 0.15%, is segregation free and overcomes the defect of high density metallurgical inclusion. The invention is applicable to producing the Ti-Mo-Ni alloy ingot with high metallurgical quality requirement.

The invention relates to a powder for a laser-cladding aluminum bronze alloy gradient coating layer and a preparation technology method. The alloy powder is prepared from nine elements, such as Al (aluminum), Cu (copper), Fe (iron), Ni (nickel), Mn (manganese), Si (silicon), Cr (cobalt), B (boron) and Mo (molybdenum),wherein the amount of Al element is 6 to 7%; the amount of Fe element is equal tothe amount of Ni element; the total amount of Fe element and Ni element is 1 to 12wt%; the total amount of Mn element, Si element, Cr element, B element and Mo element is 0.5 to 2wt%; the balance element is Cu. The novel aluminum bronze alloy gradient coating layer prepared by a laser cladding technique has the advantages that the hardness is high, the corrosion-resistant property, abrasion-resistant property and high temperature oxidizing-resistance property are excellent, and the like; the novel aluminum bronze alloy gradient coating layer can be widely applied to the repair and re-manufacturing of mechanical equipment in the fields of metallurgy, power, ocean transportation and the like, and the obvious economic benefits and social benefits are realized.

The invention discloses a nitride high-entropy ceramic fiber and a preparation method and application thereof. The high-entropy ceramic fiber contains Ti, Hf, Ta, Nb and Mo elements, the nitride high-entropy ceramic fiber is in a single crystalline phase, and all the elements are uniformly distributed in a molecular level. The preparation method of the high-entropy ceramic fiber comprises the following steps: uniformly mixing a carbide high-entropy ceramic precursor containing a target metal element, a spinning aid and a solvent to prepare a precursor spinning solution, and then carrying out spinning, degumming and nitriding processes to prepare the nitride high-entropy ceramic fiber. The nitride high-entropy ceramic fiber can be applied to a process for preparing methane by photocatalysisof carbon dioxide.

The invention discloses a standard substance for TC11 titanium alloy photoelectric spectral analysis, which comprises the following components in percentage by weight: 4.53% to 7.51% of Al, 2.2% to 4.65% of Mo, 0.59% to 2.41% of Zr, 0.15% to 0.46% of Si, 0.15% to 0.35% of Fe, 0.021% to 0.12% of C and the balance of titanium, wherein the weight percentage sum of the components is 100%. The preparation method of the standard substance comprises the following steps: dosing; suppressing electrodes by utilizing a vertical lateral pressure machine; welding the electrodes in a vacuum argon charging tank; smelting primary cast ingots by utilizing a vacuum consumable electrode arc furnace; casting secondary cast ingots by utilizing a vacuum consumable electrode arc skull furnace; smelting tertiarycast ingots by utilizing the vacuum consumable electrode arc furnace; homogenizing and carrying out transform processing; and carrying out hot hydrogen processing to prepare the standard substance for the titanium alloy photoelectric spectral analysis. The standard substance and the preparation method of the invention have the advantages that the homogenization of the components is good; the problem that alloy elements cannot be effectively detected because the Zr element has no effective distribution point in the content section of 0.6 to 2.6% and the Mo element has no effective distributionpoint in the content section of 2.2 to 4.6% in the existing standard substance is solved.