479results about How to "Uniform tissue" patented technology

The invention relates to martensite series wear-resistant steel and a preparation method thereof, belonging to the technical field of wear-resistant steel. The steel comprises the following chemical components: 0.05-0.51wt% of C, 2.0-10wt% of Mn, 0-1.5wt% of Al, 0-1.5wt% of Si, 0-1.5wt% of Cr, 0-1.5wt% of Cu, 0-1.5wt% of Ni and the balance of Fe and inevitable impurities, wherein the Mn/C ratio is not less than 9. Based on this, the following one or more composite elements can be optionally added: 0.02-0.50wt% of Mo, 0.02-0.50wt% of V, 0.02-0.50wt% of Nb, 0.01-0.5wt% of Ti, 0.02-0.50wt% of B and 0.02-0.50wt% of RE. The wear-resistant steel provided by the invention is easy to produce, low in cost and high in performance. The invention is applicable to the technical field of wear-resistant materials for mines, energy, transportation, agricultural machinery, engineering machinery and other industries.

The invention discloses a low-welding crack sensitivity steel board and manufacturing method, which comprises the following parts: not more than 0.07% C, 0.15-0.40% Si, 1.00-1.60% Mn, not more than 0.015% P, not more than 0.010% S, not more than 0.30% Cu, not more than 0.50% Ni, not more than 0.30% Cr, not more than 0.30% Mo, not more than 0.08% V, not more than 0.08% Nb, 0.010-0.020% Ti, not more than 0.003% B, Fe and inevitable impurity. The invention is characterized by the following: (1)displaying lower welding crack sensitivity component with Pcm not more than 0.20%; (2)mating the strength and flexibility reasonably with fitful yielding ratio; (3)making the price and property of the steel board superior to the congeneric import product; (4)making the maximum breadth of steel board to 4000mm; (5)simplifying the technique to ensure higher flatness without quenching water.

The invention discloses a coarse cereal instant rice and a preparation method of the coarse cereal instant rice. The coarse cereal instant rice is mainly prepared by conducting extrusion curing, cutting, pelletizing, drying, then baking and puffing on coarse cereal powder, starch and solid vegetable oil, wherein the coarse cereal is selected from one or combination of corn flour, rice flour, sorghum flour, buckwheat, pearl barley flour, black rice four, sweet potato flour, millet flour, coarse rice powder, glutinous rice flour, red rice flour, soybean flour, red bean flour, green gram starch, black bean flour, oat powder and wheat flour. The coarse cereal instant rice provided by the invention adopts a loose porous structure inside, so that the coarse cereal instant rice is good for digesting and absorbing and is excellent in rehydration property, the rehydration time is relatively short, the rehydrated rice is in full grain, and the coarse cereal instant rice is chewy and not hard or sticky when being eaten.

The invention discloses a flying-shear main-transmission gearwheel steel and a preparation method thereof. The flying-shear main-transmission gearwheel steel comprises the following elements in percentage by mass: 0.10-0.20% of C, 2.00-3.00% of Cr, 2.50-3.50% of Ni, 0.4-1.00% of Mo, 0.10-0.40% of Si, 0.40-1.00% of Mn, at most 0.25% of Cu, at most 0.1% of Al, at most 0.020% of P, at most 0.015% ofS, at most 30ppm of O, at most 100ppm of N and at most 2ppm of H. The preparation method comprises the following steps: (1) smelting according to the percentage by mass to obtain a forging stock; (2)forging; (3) carrying out normalizing heat treatment; (4) carrying out gear hobbing; (5) carrying out surface carburization quenching heat treatment; and (6) carrying out gear grinding. The inventionenhances the bearing capacity and reliability of the gearwheel, and satisfies the production demands of high-carbon high-alloy steel and enhanced specifications, thereby having wide popularization and application prospects.

A method for shaping a Mg-alloy pipe includes such steps as putting a Mg-alloy pipe blank in a mould for generating superplastic bending, and introducing a pressure medium to the inside of said pipe blank for generating superplastic expansion to form a Mg-alloy pipe. Its apparatus is composed of mould consisting upper and lower moulds, sealing unit consisting of sealing block and two hydraulic cylinders, pressure medium source, and heating unit.

The invention relates to a method for preparing an aluminum foil for a lithium battery and belongs to the technical field of machining of aluminum alloy materials. The method for preparing the aluminum foil for the lithium battery includes the steps of performing smelting and cast rolling processes: heating and smelting raw materials of the aluminum foil for the lithium battery to form an aluminum alloy melt, sequentially carrying out refining slagging-off, grain refining, degassing deslagging and filtration treatment and subjecting the filtered aluminum alloy melt to continuous cast rolling to form a blank; performing a cold rolling process: subjecting the blank to cold rolling firstly and then to primary annealing treatment, rough rolling and secondary annealing treatment; performing foil pressing treatment: carrying out finish rolling on the annealed aluminum foil, and finally slitting the foil to obtain the aluminum foil finished product for a lithium battery finished product. According to the method for preparing the aluminum foil for the lithium battery, composition segregation in the process of alloy cast rolling is improved through added uniform annealing treatment; an original cast rolling structure is improved so that the product with uniform constituents and structure and stable performances can be obtained; moreover, the performances of the aluminum foil for the lithium battery can be improved.

The invention discloses a preparation method of a graphene-reinforced copper-based composite and belongs to the field of preparation of high-strength and high-conductivity composites. The method comprises steps as follows: graphene, nano copper powder and cobalt powder in the required mass ratio are mixed in absolute ethyl alcohol, the mixture is physically dispersed under electromagnetic stirring, and then physically dispersed mixed slurry is added to a ball milling tank for mechanical ball milling; after evenly mixed slurry is centrifugally dried, obtained mixed powder is annealed and then subjected to hot-pressing SPS (spark plasma sintering) forming; an obtained block blank is annealed and then subjected to hot extrusion, and the graphene-reinforced copper-based composite is obtained. The graphene-reinforced copper-based composite prepared through the method has the good mechanical property, uniform structure and good heat and electricity conductivity.

A preparation method of a magnesium alloy variable-section cylindrical member by composite extrusion deformation is characterized in that the method comprises the following steps: firstly, orderly performing homogenization pretreatment and hot extrusion deformation of an AZ80 magnesium alloy blank; preparing a variable-section cylindrical force-bearing member by forward and backward composite extrusion; finally performing turning and heat treatment to obtain a magnesium alloy variable-section cylindrical member. Compared with the prior art, the invention has the following advantages that the invention can prepare large-size cylindrical members; the material grain is fine; the mechanical properties are high; and the procedures are simple.

The invention discloses an alloy ingot for an automotive hub and a production method thereof. The alloy ingot comprises the following components: 6.8-7.2% of Si, 0.28-033% of Mg, 0.10-0.15% of Ti, 0.015-0.030% of Sr, less than or equal to 0.10% of Fe, less than or equal to 0.05% of Mn, less than 0.01% of zinc, less than 0.01% of Cu, less than 0.003% of Ca, less than 0.002% of P, less than 0.02% of other single impurity content, less than 0.1% of total impurity content and the balance of aluminum. The production method of the alloy ingot for the automotive hub comprises the following steps of: adding 3303 industrial metallic silicon and electrolytic aluminum liquid for batching, heating at an appropriate temperature and melting, spreading a covering agent so as to reduce oxidation slagging, stirring so that the industrial metallic silicon rapidly melts, keeping uniform temperature, slagging off, keeping melt clean, spraying powder and refining by adopting high-purity N2 and a refined powder spraying agent, controlling the temperature of a smelting furnace to 740-750 DEG C, adding Al-Sr alloy to aluminium water, carrying out secondary degassing and slagging-off by adopting a powder spraying refinement method, filtering to remove slag, and casting the alloy ingot in line with requirements. The alloy ingot obtained by the method has the advantages of stable and uniform components, compact structure and clean surface; and the production method is the best production method for producing the A356.2 alloy ingot for the low-iron high-end automotive hub.

A method to prepare ultra-fine grain tungsten-copper alloy and the tungsten-copper alloy, it belongs to powder metallurgy technology field. The solution of concentrated HNO3 and solution of Cu (NO3)2 will be added into the solution of (NH4)2WO4 at the condition that they are blended, the chemical deposition reaction will occur in the agitator. And then the deposit will be burned and grinded to produce the composite powder of tungsten-copper oxidate. The composite powder will be reduced at low temperature in the pipe furnace, and nanometer tungsten-copper composite powder can be gained, and then they will be pressed to take shape, the pressed compact will be sintered at the protection of H2 and ultra-fine grain tungsten-copper alloy can be gained. The weight percent of copper in a kind of tungsten-copper alloy produced according to the above method is 20%, the relative density of the alloy is 98.0%-99.7%, the average crystal grain size of the tungsten in the alloy is 0.5-1.5 mu m, the electrical resistance of the alloy is 0.035-0.041X10-6omega .m, the heat-transmit index is 200-223W.m-1.k-1. The advantage of it is that. The densification degree of the alloy is high, the tungsten crystal grain is small and uniform, the copper is highly dispersed to compose a compact net. And the flow of it is short, the technology operation is easy and reliable, the production efficiency is high, the energy and production cost is lower, and an industrial production can be carried on according the method.

The invention discloses a molding method of ultra-thin magnesium alloy plank stuff, which firstly carries out heat preservation of magnesium alloy cast ingots at the temperature of 648 to 688 K for 22 to 25 hours under the protection of inert gases, implements the homogenization treatment of ingot blanks, directly cogs the ingot blanks with heat extrude until the total deformation degree of the heat-extruded and cogged ingot blanks reaches over 40 percent and then implements annealing; the molding method trims the plate blanks after the heat-rolled cogging into required width dimension, implements transverse rolling in a thermal treatment status and controls the heat rolling deformation degree between 20 and 30 percent at the first time, implements longitudinal rolling after the middle annealing, and then implements a plurality of times of transverse rolling, longitudinal rolling, repeated transverse rolling and repeated longitudinal rolling in the thermal treatment status with the assisted middle annealing until the thickness of the plank stuff is 1mm; the molding method implements the cold rolling of the plank stuff with the reduction of 5 percent in each pass, the total deformation degree of the cold rolling between two middle annealing is controlled at 30 percent, and the thickness of the plank stuff after the cold rolling is 0.1mm; the molding method finally implements the flattening and the finishing operation of the plank stuff. The plank stuff produced by the molding method of the invention has tiny crystal grains, even tissue, little defects, lessening cardinal area texture, and improving mechanical, corrosion resistant and electrochemical performance, etc..

The invention provides a high efficient submerged arc additive manufacturing method for a metal component with good mechanical property. The metal component submerged arc overlay welding forming method is as follow: two poles of a welding power supply are connected with a welding gun and a base material respectively, a particle-shaped welding flux and a metal welding wire are synchronously conveyed to the surface of the base material, the power is switched on, an electric arc is generated between the welding wire and the base material under the coverage of the welding flux, so that the surfaces of the welding wire and the base material locally melt, a weld pool is formed on the surface of the base material, the welding wire and the welding flux are continuously conveyed, the relative movement track of the welding gun and the base material is controlled according to the component digital to analog data, and a metal component is formed through layer-by-layer overlay welding deposition on the base material.

The invention discloses a nanometer composite hydrophobic hard transparent film and a preparation method thereof, belonging to the nanometer technical field. The preparation method of the nanometer composite hydrophobic hard transparent film comprises the preparation of silicon dioxide sol, the preparation of aluminium sol, the preparation of composite sol, film-plating and other steps. The hardness of the finally obtained nanometer composite hydrophobic hard transparent film of the invention can reach 5h which is detected by a QHQ type pencil hardness gauge and SL100 type static contact angle admeasuring apparatus, and the hydrophobic angle can reach 115 degrees so that the nanometer composite film has excellent mechanical properties and hydrophobic function. The obtained nanometer composite hydrophobic hard transparent film in the invention can be used on the surface of different devices so as to prevent or reduce the adhesion of steam, ice and snow and other pollutants and has broad application prospect in national defense, aviation, aerospace, everyday life and other industrial fields.

The invention belongs to the technical field of alloy molding and manufacturing, and discloses a processing method suitable for a 4D printed nickel-titanium shape memory alloy. The processing method includes the following steps that (1) 4D printed nickel-titanium shape memory alloy parts are printed and molded by using an SLM, the material of the 4D printed nickel-titanium shape memory alloy partsis the nickel-titanium alloy consisting of nickel and titanium, by the mass percentage, wherein the mass percentage of the nickel is 55-56%, and the mass percentage of titanium is 44-45%; (2) the 4Dprinted nickel-titanium shape memory alloy parts are heated to 300-700 DEG C, and heat insulation is conducted for 30-90min; and (3) the 4D printed nickel-titanium shape memory alloy parts are cooledto the room temperature, so that the processing of the 4D printed nickel-titanium shape memory alloy parts is completed. The processing method is simple in process, convenient to implement, higher inflexibility and higher in applicability.

The invention relates to a method for preparing a ceramic-based composite material environment barrier coating by laser cladding, which has the technical characteristics that: 1, a composite material to be coated is processed to a required size and completely washed in an ultrasonic washing machine; 2, the environment barrier coating material powder, a bonding agent and a solvent are mixed uniformly according to a certain ratio to form pulp; 3, the pulp is uniformly brushed on the surface of the composite material and dried; and 4, the membrane coated with the coating pulp is placed on a laser processing worktable, laser cladding is performed by a certain process, and thus, the environment barrier coating is prepared. The interface of the obtained coating is firmly bonded, the coating is uniform and compact, and the quality of the coating is improved obviously. In the invention, the process is simple, area-selectable cladding can be performed, the processing period is short, and high-performance environment barrier coating can be prepared.

The invention relates to a magnesium alloy brazing filler metal containing a rare-earth element Er and a preparation method thereof, and belongs to the technical field of magnesium alloy connection. The magnesium alloy brazing filler metal comprises the following components in percentage by weight: 40-55% of Mg, 39-55% of Zn, 1-5% of Al and 0.1-1.5% of Er, wherein the Er is uniformly distributed.The preparation method comprises the steps of arranging alloy ingots in a preheat crucible, heating under protective atmosphere and mechanical stirring, fishing slag after the alloy ingots are completely fused, stopping heating brazing filler metal, stirring the brazing filler metal, applying ultrasonic waves on the fused brazing filler metal after the brazing filler metal is cooled to 380-600 DEG C, inserting an ultrasonic rod preheated to 300-700 DEG C into a brazing filler metal liquid level with the ultrasonic frequency of 18-22kHz, ultrasonic intensity of 0.5-5W/cm2 and the time of 10-150s, standing still after moving out the ultrasonic rod after ending, pouring the brazing filler metal liquid into a mould and air cooling to room temperature. The number of dendritic crystals of the obtained product is obviously reduced, crystal grains are refined, and the strength and the toughness are improved.

The invention discloses a high-strength magnesium alloy extruded seamless tube and a making technology thereof, and belongs to the fields of metal material processing technologies and metallurgical technologies. The alloy components of the tube comprise, by mass, 8.0-10.0% of Gd, 1.0-3.0% of Y, 0-1.0% of Zn, 0.1-0.7% of Zr, and the balance Mg. The making technology comprises the following steps: carrying out cogging extrusion after preprocessing an alloy ingot obtained after smelting the above components in order to form a rod, punching the cogged rod, carrying out secondary extrusion on a double-action extruder with a hole forming pin to form a seamless tube, and carrying out optimized subsequent heat treatment to obtain the high-strength magnesium alloy extruded seamless tube. The obtained tube has no extrusion welding welds in the circumference direction, has a good microstructure uniformity, and has an excellent fatigue resistance. The mechanical performances of the tube produced in the invention are obviously better than that of existing commercial grades of magnesium alloy tubes.

The invention discloses a method for improving the titanium alloy swaging forged structure homogeneity. The method includes the steps of (1) placing titanium alloy which is obtained through conventional upsetting swaging forging and provided with the square cross section on an operating platform, enabling the length direction of the titanium alloy with the square cross section to be parallel to the axial direction of an upper flat anvil, overall flattening the titanium alloy with the square cross section in the diagonal direction of the square cross section, and obtaining titanium alloy with the hexagon cross section, (2) turning over the titanium alloy with the hexagon cross section by 90 degrees to carry out overall flattening, and obtaining titanium alloy with the octagon cross section, and (3) repeating the step (2) on the titanium alloy with the octagon cross section until a titanium alloy forge piece with the square cross section and the size same as the size of the titanium alloy with the square cross section is obtained. According to the method, large plastic deformation is carried out on the cross section of a material in different directions, the cross inhomogeneous deformation caused by swaging deformation in a single direction is improved, and therefore the aim that structures of various portions of the forge piece are homogeneous is achieved.

A functional refractory for smelting steel is prepared from one or more inorganic materials through mixing, smelting and casting. Its advantages are simple process, low cost, long service life and high smelting temp (1800-3200 deg.C).

The invention discloses super-thick X70 pipeline steel and a manufacturing method thereof, wherein the pipeline steel is 30-32mm thick, and the pipeline steel comprises the following chemical ingredients in percentage by mass: 0.03-0.06% of C, 0.1-0.30% of Si, 1.30-1.60% of Mn, less than or equal to 0.010% of P, less than or equal to 0.0050% of S, 0.030-0.050% of Nb, 0.008-0.020% of Ti, 0.10-0.30% of Ni, 0.l0-0.30% of Cr, 0.10-0.30% of Cu and the balance being Fe and inevitable impurity elements. smelting raw materials are sequentially subjected to KR molten iron pretreatment, converter smelting, LF refining and RH vacuum degassing to obtain molten steel which is relatively high in purity, and then the pipeline steel, which is high in thickness, high in strength, narrow in strength interval, excellent in low-temperature toughness, and excellent in both low-temperature resistant aging performance and HIC resistance, is obtained through a controlled rolling and controlled cooling process.

The invention discloses an aluminum alloy medium plate preparation method. The aluminum alloy medium plate preparation method comprises the following steps of: smelting at 700-750 DEG C, degassing a melt by adopting a multistage degassing purification system, and filtering the melt by adopting a 300ppi-foamed ceramic filtration plate; casting the melt to obtain an aluminum alloy ingot blank, and carrying out stress-relieving treatment at 300-500 DEG C for more than or equal to 1 hour; controlling the temperature of a saw cutting aluminum alloy sheet at 350-500 DEG C, carrying out solution treatment for more than or equal to 0.5 hour, controlling the tensile deformation at 1%-4%, controlling the temperature of the aluminum alloy sheet at 50-300 DEG C, and carrying out aging treatment for 2-40 hours to obtain an aluminum alloy medium plate. Compared with the aluminum alloy medium plate prepared by a conventional hot-rolling method, the aluminum alloy medium plate prepared by the method has the advantages that the preparation working procedures are reduced, the production cycle is short, the cost is reduced, the plate has good quality and high strength and meets the market requirements, and the good economic benefits and social benefits are achieved.

The invention discloses a silver copper oxide/copper composite electrical contact material and a preparation process thereof. The process comprises the following steps: mixing silver and copper according to certain proportions, and then, smelting the mixture in an intermediate frequency furnace; then, carrying out alloy atomization by using high pressure water atomizing equipment; baking after atomization to obtain powder; screening; putting the screened powder into an internal oxidization furnace for oxidizing at certain temperature and oxygen pressure; carrying out isostatic cool pressing after oxidization to form a billet; sintering and extruding to form a plate; and then, carrying out composite rolling with copper to obtain a finished product. Because the formula and process disclosed by the invention are reasonable, the produced electrical contact has the characteristics of high conductivity, uniform and fine tissue, high bonding strength between a working layer and a welding layer, fusion welding resistance, electrical arc erosion resistance and the like.

The invention provides a method for preparing a high-density special-shaped pure tungsten product through low-temperature sintering, and belongs to the technical field of powder injection molding. The method comprises the technological processes that an air flow mill is adopted for carrying out dispersing and staging treatment on commercially available high-purity tungsten powder, the treated powder and a bonding agent are evenly mixed for mixing, and even feed is obtained; the feed is subjected to injection molding to form a blank in a certain shape; and the formed blank is subjected to solvent degreasing and hot degreasing and then is sintered, and the tungsten product is obtained. Powder is subjected to dispersing and staging treatment through the air flow mill under the protective atmosphere, the powder is driven by gas to collide with each other and can be treated on a large scale, and no impurity is introduced; the particle size distribution of the treated powder becomes narrow, and the shape of particles becomes regular and is similar to a spherical shape; and loose-fitting tap density is increased, the loading amount of the injection-molded powder is correspondingly improved to 55%-70%, and the density of the pure tungsten product manufactured after sintering of the hydrogen atmosphere of 1,900 DEG C is higher than 96%.

The invention discloses a method for improving Al0.3CoCrFeNi high-entropy alloy intensity. Five kinds of analytical pure metals of Al, Co, Cr, Fe and Ni are blended according to the atomic ratio of 0.3 to 1 to 1 to 1 to 1, smelting is carried out in a vacuum arc melting furnace, the molten alloy is subjected to suction casting to form plate-shaped high-entropy alloy materials with 2mm thickness, 10mm width and 85mm length, and then a high-entropy alloy is subjected to cold rolling and annealing heat treatment to eliminate the residual internal stress, generated in the casting process, of the high-entropy alloy; and then a wire cutting machine is used for cutting bone-shaped standard tensile samples with a standard distance of 5mm, the front faces and back faces and the two side faces of the tensile samples are polished, and the polished samples are subjected to a double-glow chromizing test by using a double-glow metal furnace, and finally, the obtained samples are strengthened high-entropy alloy samples. According to the method for improving the Al0.3CoCrFeNi high-entropy alloy intensity, through a double-glow chromizing technology, the friction coefficient of the high-entropy alloy is reduced, and the amplitude is greatly reduced.

The invention discloses a method for preparing silicon carbide particle-reinforced silicon nitride composite ceramic parts, and belongs to the technical field of ceramic part preparation. The method comprises the following steps of: mixing SiC powder, Si3N4 powder, a sintering acid and a paraffin base multicomponent binder into a uniform feed; and performing solvent-thermal debinding and presintering at the temperature of between 1,150 and 1,200 DEG C on a preformed blank obtained by injection molding of the feed, and sintering in a vacuum carbon tube furnace at the temperature of between 1,800 and 1,900 DEG C and at the normal pressure in the Ar atmosphere to prepare SiCp/Si3N4 composite ceramic parts. The method for preparing the silicon carbide particle-reinforced silicon nitride composite ceramic parts has the advantages of direct preparation of SiCp/Si3N4 composite ceramic products with complicated geometry, uniform texture, high dimensional accuracy and no need of subsequent processing, achievement of integrated molding of the SiCp/Si3N4 materials and the parts, and establishment of low-cost preparation technology for the SiCp/Si3N4 composite ceramic parts with complicated shapes and high dimensional accuracy.

The invention relates to a CrMoNbTiZr high-entropy alloy material and a preparation method of the CrMoNbTiZr high-entropy alloy material. The high-entropy alloy material comprises Cr, Mo, Nb, Ti and Zr, wherein the molar ratio of Cr to Mo to Nb to Ti to Zr is 1:1:1:1:1. The preparation method comprises the steps that 1, powder is prepared, and particularly metal powder is prepared according to the equal molar ratio; 2, powder mixing is carried out, and particularly the prepared powder is mixed to be uniform in a V-shaped powder mixing machine; 3, pressing and block forming are carried out, and particularly the mixed powder is subjected to cold pressing under a pressing machine to form blocks; and alloy is molten, and particularly a vacuum non-consumable arc melting furnace is used for melting the samples which are obtained after the powder is pressed to be blocks. The CrMoNbTiZr high-entropy alloy material mainly comprises a BCC solid solution phase and a small amount of Laves phase, meanwhile has the advantages of being high in hardness, high in corrosion resistance and the like, and has the good application prospect in the field of wear resistance and corrosion resistance.

The invention discloses a method for preparing an Al0.5CoCrFeNi high-entropy alloy. An intermediate alloy serves as a raw material, and volatilization of a low-melting-point element Al in the smelting process is greatly reduced. Meanwhile, a vacuum induction heating device is adopted, the electromagnetic stirring effect of the induction heating device is utilized, and therefore the component uniformity of a cast ingot is guaranteed. According to the method, the melting point difference between the lowest-melting-point metal Al and the highest-melting-point metal Cr is indirectly reduced, the problem of excessive volatilization of the low-melting-point Al simple substance in the smelting process is solved, and the component uniformity of the multi-element high-entropy alloy is guaranteed through the electromagnetic stirring effect existing in induction heating. Through reasonable designing of the atmosphere, the air pressure, the die preheating temperature, the smelting temperature, the heat preservation time, the casting speed and other parameters in the smelting process, a large Al0.5CoCrFeNi high-entropy alloy cast ingot is successfully prepared.

The invention discloses a process for preparing nickel-base superalloy. The superalloy consists of the following components in percentage by weight: 22.5 to 24.5 percent of Cr, 7.0 to 8.0 percent of Co, 6.5 to 7.5 percent of W, 3.0 to 4.0 percent of Mo, 1.2 to 1.8 percent of Al, 1.5 to 2.5 percent of Ti, 2.0 to 3.0 percent of Nb, 1.0 to 2.0 percent of Mn, 2.0 to 4.0 percent of Fe, 0.02 to 0.08 percent of B, 0.5 to 1.5 percent of Ce, less than or equal to 0.1 percent of C, less than or equal to 0.2 percent of Si, less than or equal to 0.008 percent of P, less than or equal to 0.008 percent of S and the balance of Ni. The process for preparing the nickel-base superalloy comprises a smelting process and a heat treatment process, wherein the smelting process comprises the steps of: smelting master alloy by using a vacuum induction furnace, and performing directional solidification in a liquid metal directional furnace to prepare directional column crystal alloy, wherein the vacuum degree of the directional furnace is about (1-5)*10<-4>mmHg, the pouring temperature is 1,580 to 1,600 DEG C, the drawing speed is 4 to 8mm/min, the temperature gradient is 75 to 85 DEG C/cm, and the temperature of liquid tin is 250 to 350 DEG C; the heat treatment process comprises the following steps of: heating the column crystal alloy obtained through smelting to 1,240 to 1,260 DEG C, preserving heat for 3 to 5 hours, and performing air cooling to room temperature; heating to 1,150 to 1,170, preserving heat for 3 to 5 hours, and performing air cooling to room temperature; and heating to 930 to 950 again, preserving heat for 8 to 12 hours and performing air cooling to room temperature.

The invention relates to a novel preparing process of a material used for a silver zinc oxide contact. The invention has a process that a material prepared by silver, zinc and additives according to a certain proportion is put into an intermediate frequency smelter for melting; a high pressure water atomizing device is adopted for high pressure alloy atomization; atomized alloy powder is dried and oxidated for modification; an equal static ingot is formed after equal static treatment; the ingot is agglomerated in a heating furnace; the agglomerated ingot is delivered into an extruding machine to extrude plates or wires; the extruded plate is rolled and punched for shaping after surface treatment and silver restoring; the extruded wire is pulled and annealed to get a finished wire which is used for making rivets or different shape materials. The silver zinc oxide contact material prepared by the process has uniform metallographic structure, high density and good machining performance.

The invention relates to a preparation method of RE-Mg-Ni-M based hydrogen storage alloy. Under the protection of inert gases, the as-cast condition products of the RE-Mg-Ni-M based hydrogen storage alloy are smelted through using a cold-crucible magnetic-suspension furnace; heat-treated products are obtained by heat treatment of the as-cast condition products. The method has the steps that: (1) material is prepared; (2) metal Ni and M are smelted together; (3) metal RE is smelted; (4) the casting ingots obtained from step (2) and step (3) are smelted; (5) the ingot obtained from step (4) is overturned and smelted to obtain alloy solution, then master alloy of magnesium is added into the alloy solution to obtain the as-cast condition products of the RE-Mg-Ni-M based hydrogen storage alloy by cooling; (6) heat treatment is carried out to the as-cast condition products to get the heat-treated product. The single weight of the as-cast condition products and heat-treated products is 50-1000g; the content of magnesium in the products is close to designed content; the components of the as-cast condition products are uniform and have high hydrogen storage capacity; the structure and components of the heat-treated products are uniform and also have high hydrogen storage capacity and long cycling life.