166results about How to "Good composition uniformity" patented technology

There is disclosed a piezoelectric thin film having less non-uniform portion and holding satisfactory piezoelectric characteristics, a method of manufacturing the film, a piezoelectric element using the piezoelectric thin film, and an ink jet system recording head using the piezoelectric element. In the piezoelectric thin film of perovskite crystals formed on a substrate by a sol-gel process and represented by a general formula Pb_(1-x)La_x(Zr_yTi_1-y)O₃ (where 0≦x<1, 0.05≦y≦1), a film thickness of the thin film is 1000 nm or more and 4000 nm or less, and a difference between a maximum value and a minimum value of y in an arbitrary portion of the thin film is 0.05 or less.

The present invention relates to a kind of pre-alloyed powder and its application in making diamond tool. The pre-alloyed powder consists of at least two selected from Fe, Co, Cu and Ni as basic components, one or several of Mn, Ti, Sn, Mo, W and WC, and one or two of RE, such as La and Ce. It contains at most 80 % of Fe, at most 40 % of Co, at most 80 % of Cu, at most 40 % of Ni, at most 8 % of M and 0-5 % of RE, where, M is one or several of Mn, Ti, Sn, Mo, W and WC and RE is La and/or Ce. The pre-alloyed powder has also inevitable impurity. Scanning electronic microscope measurement shows that the pre-alloyed powder has basic particle size smaller than 15 micron and oxygen content not more than 2 %. The pre-alloyed powder is used as adhesive in making diamond tool.

The invention provides a method for preparing a hydroxyapatite/titanium dioxide composite bioactive coating on the surfaces of medical metals such as a titanium alloy, and the like, and belongs to the technical field of the preparation of bioactive coatings on the surface of the titanium alloy. The composite coating is prepared by preparing precursor sols of HA and TiO2 respectively, then mixing the precursor sols of the HA and the TiO2, and performing aging, coating, drying and heat treatment. The coating has high bioactivity, low cost of preparation technology, and high bonding strength with a matrix, is applicable to the preparation of surface coatings of various complicated geometric structures, and can be used for surface modification of surgical implants such as artificial hip joints and dental implants as well as orthopedic instrument products.

A sintering welding wire for the multi-wire high-speed autoamtic hidden arc welding contains MgO (19-28 mass%), CaF2 (12-18%), ZrO2 (8-15%), Al2O3 (18-24%), SiO2 (17-25%), CaO (7-13%), RE (0-7%), MnO (0-5%), TiO2 (0-5%), Na2O+K2O (2-5%), S (0-0.05%), and P (0-0.06%). Its advantages are stable arc, beautiful welded seam, and high welding speed (1.5-2 m/m).

The invention relates to a preparation method for a diamond cutting grinding piece. The diamond cutting grinding piece comprises a diamond cutting grinding piece body arranged on a 65Mn steel substrate, and corrugated water channels are formed in the surface of the diamond cutting grinding piece body. The preparation method for the diamond cutting grinding piece comprises the steps of material mixture, substrate machining, compression forming, sintering and edge forming. The diamond cutting grinding piece produced through the preparation method for the diamond cutting grinding piece has the cutting effect and the grinding effect, and is safe and reliable in performance, simple and reasonable in structure, low in manufacturing cost, flexible in operation, good in sharpness of products and good in chip-removal performance.

A sputtering target made of an Ag base alloy containing 0.6 to 10.5 atomic % Ta and 2 to 13 atomic % Cu, is characterized in that: when the sputtering surface of the sputtering target is image-analyzed,

(1) the ratio of the total area of Ta particles having a circle equivalent diameter of from 10 μm or more to 50 μm or less, to the total area of all Ta particles, is 60% or more, and the average distance between the centers of gravity of Ta particles is from 10 μm or more to 50 μm or less; and

(2) the ratio of the total area of Cu particles having a circle equivalent diameter of from 10 μm or more to 50 μm or less, to the total area of all Cu particles, is 70% or more, and the average distance between the centers of gravity is from 60 μm or more to 120 μm or less.

In an insulating film formation method, a cycle A in which O₃ at a low flow rate is supplied onto a substrate and then O₃ supplied is allowed to react with Hf on the substrate in a non-equilibrium state to form a hafnium oxide film is carried out M times (M≧1), and a cycle B in which O₃ at a high flow rate is supplied onto the substrate and then O₃ supplied is allowed to react with Hf on the substrate in an equilibrium state to form a hafnium oxide film is carried out N times (N≧1). These insulating film formation cycles are defined as one sequence. This sequence is repeated until a desired thickness is obtained, thereby forming a target insulating film.

The invention discloses a preparation method of spherical nickel-rhenium alloy powder. The preparation method comprises the following steps that dissolving and mixing are carried out; reducing is carried out after atomizing or dynamic drying is carried out, and precursor powder is obtained; and reducing, slurry preparation, spray granulation and balling forming are carried out. According to the aim, the preparation method of the spherical nickel-rhenium alloy powder is provided, the problems that an existing low-rhenium alloy is uneven in ingredient, rhenium-containing elements can hardly be introduced into a base material, multicomponent ingredient controllability is poor, and the preparation process is complex are solved, a balling process is creatively used two times, and the spherical powder is obtained well and fast in a saving manner. The powder obtained through the method can be directly applied to wear-resisting anti-corrosive coatings, thermal spraying, 3D printing and powder metallurgy parts, and powder raw materials do not need to be additionally matched.

The invention relates to a laser cladding method for a titanium alloy. The laser cladding method includes the following steps that firstly, a nickel-based alloy and carbide ceramics are ground into powder and then stirred and mixed, and mixed powder is obtained for standby application; secondly, a titanium alloy Ti6Al4V substrate is coated with a layer of bonding agent, then the mixed powder obtained in the first step is added, tabletting is conducted, and a preset coating is formed; and thirdly, the titanium alloy Ti6Al4V substrate containing the preset coating is heated to 100 DEG C to 800 DEG C, the temperature is kept for 10 min to 30 min, then laser cladding is conducted under the condition that the temperature is not changed, and the titanium alloy which has the low cracking sensibility and is coated with the coating is obtained. Compared with the prior art, the manufactured composite coating is uniform in structure and has the lower cracking sensibility. The laser cladding method can be applied to modification of titanium alloy parts serving on aerospace vehicles and navigation ships under the wear working condition and anti-acid pumps and anti-acid valve titanium alloy components.

The invention discloses a hot-rolled steel plate for an ultra-wide thick-wall X80-grade pipeline and a production method of the hot-rolled steel plate. The steel plate comprises the following components: 0.03%-0.05% of C, 0.16%-0.28% of Si, 1.50%-1.75% of Mn, 0.05%-0.08% of Nb, 0.012%-0.025% of Ti, 0.10%-0.25% of Cr, 0.01%-0.04% of V, smaller than or equal to 0.19% of Mo, smaller than or equal to0.20% of Ni, smaller than or equal to 0.14% of Cu, smaller than or equal to 0.020% of Al, smaller than or equal to 0.013% of P, smaller than or equal to 0.0015% of S, 0.0005%-0.0020% of O, 0.001%-0.004% of N, 0.0010%-0.0045% of Ca, 0.40%-0.65% of Mo+Ni+Cr+Cu, and the balance of iron and inevitable impurities, wherein Ca/S is larger than or equal to 1.6. The rough rolling starting temperatureis 1070-1150 DEG C, and the finish rolling starting temperature is 820-860 DEG C. The final rolling temperature is 760-780 DEG C, and the cooling temperature is 730-770 DEG C. The width of the steelplate is larger than 4000 mm, and the thickness of the steel plate is larger than 25 mm. The steel plate is good in low-temperature toughness and low in yield ratio.

The invention provides a novel large-current-carrying heat-resistant aluminum alloy wire and a preparation method thereof. The aluminum alloy wire is composed of elements such as Se, Ru, Zr, Sc, Ni and Si, the Vickers hardness of the aluminum alloy wire at the room temperature is no less than 70 HV, the extension strength of the aluminum alloy wire at the room temperature is no lower than 200 Mpa, the elongation is no less than 10%, the electric conductivity at 20 DEG C is no lower than 58% that of IACS, and the continuous use temperature is no lower than 165 DEG C. According to the method, the wire is obtained through processing by steps such as smelting, casting, rolling, friction stirring processing, slicing, overlaying, extruding, drawing and heat treatment, and finally the wire with good physical and chemical properties is obtained. The aluminum alloy wire adopts common industrial grade aluminum ingots as raw materials for production, compared with the prior art, the product properties of higher electric conductivity, higher strength and better heat resistance can be obtained, and the wire has good development prospects.

The invention discloses a method for preparing a diamond blade by using a special metal bond. The method comprises the following steps of: (1) weighing the following raw materials in percentage by mass: 10-15% of pre-alloying powder, 22-30% of Cu, 3-12% of Sn, 25-40% of Fe, 10-15% of TFe, 3-6% of Zn, 5-10% of W, 1-3% of Mn and 0.1-0.2% of PFe, fully mixing and ball-milling the raw materials in a mechanical mixer, wherein the pre-alloying powder comprises the following materials in percentage by mass: 45-55% of Fe, 5-10% of Ni, 25-35% of Cu and 5-10% of Co; (2) mixing the metal powder prepared in the step (1) with diamond; (3) adding a forming agent, mixing uniformly and air drying; (4) cold pressing; (5) performing hot pressed sintering to obtain a high-density thin sheet; and (6) grinding the thin sheet to finally obtain the blade. The method for preparing the blade by using the special metal bond has the advantages of low sintering temperature and short sintering time, and the prepared blade has long service life and good sharpness, therefore, the use cost of the blade is greatly reduced.

The invention relates to a manufacturing process for centrifugal casting of multi-element eutectic high-alloy rolls, and belongs to the technical field of metallurgical rolls. The technical scheme includes that eutectic compositions are selected as materials of a roll working layer, and besides five elements of C, Mn, Si, P and S commonly existing in steel, not less then five alloying elements of Cr, W, Mo, V, Nb, Ti, Al, Cu, B and Mg need to be added into the roll materials to form a multi-element alloying state; carbon content of the roll materials is controlled to be 1.3%-2.8% in mass percent. The manufacturing process is small in solidification temperature range of the eutectic compositions, and particularly suitable for obtaining high-quality castings under the circumstance that feeding conditions are insufficient; the castings are crystallized simultaneously, and optimal in composition uniformity, concentrated cavity shrinkage is formed, metallic yield by casting moulding is high; the metal is solidified at the same time, and casting stress in the process of solidification is minimum; the eutectic compositions in alloy are lowest in melting point, and smelting cost is also low; liquid of the eutectic compositions is best in fluidity; castability is improved, and abrasion resistance and heat resistance are taken into consideration.

An anisotropically shaped powder composed of oriented grains with a specific crystal plane {100} of each crystal grain being oriented, a related manufacturing method and a method of manufacturing a crystal oriented ceramics using such an anisotropically shaped powder are disclosed. The anisotropically shaped powder includes a principal component of an isotropic perovskite-based pentavalent metal acid alkali compound represented by a general formula (1): (K_aNa_1−a)(Nb_1−bTa_b)O₃ (wherein 0≦a≦0.8 and 0.02≦b≦0.4). In manufacturing the anisotropically shaped powder, a bismuth-layer-like perovskite-based compound of a specific composition is acid treated; a source of K or the like is added to the resulting acid-treated substance; and the resulting mixture is heated.

Preparation of sintering resistant hexaaluminates, AAl11O18, wherein A is an alka-line earth or rare earth metal, and more particularly lanthanum, by a combination of sol-gel and microemulsion techniques using a water soluble salt of A, and a method of forming spherical pellets thereof are disclosed.

The invention discloses a preparation method of an aging-enhanced copper-chromium alloy. The preparation method comprises the following steps that 1, vacuum induction melting is carried out by adopting nitrogen as a protective gas; 2, powder is prepared through atomization by using a ring hole limiting type atomizer; 3, screening is carried out on the atomized alloy powder according to different particle sizes; and 4, hot pressed sintering and aging treatment are carried out in the alloy powder with a certain particle size to obtain the copper-chromium alloy. According to the preparation method of the copper-chromium alloy, the solid solubility of chromium in copper is improved; compared with an alloy prepared through a mechanical ball milling method, the alloy is better in component uniformity; the copper-chromium alloy prepared through gas atomization has fine grain structures and relatively high degree of supersaturation of chromium, and the obtained alloy sample has high conductivity and strength; and phases precipitated from the alloy powder obtained after sintering are small in size and large in number, and the alloy powder can be used for materials of high-energy electric conduction elastic devices and electrical contacts in the aerospace field.

The invention discloses a carbon segregation control method for a continuous casting round billet for a vehicle wheel. The carbon segregation control method includes the following steps that the floating range of the content of chemical components of steel and the corresponding target content of the components is reduced; the superheat degree of molten steel during casting is reduced; and various compound stirring manners are adopted for stirring while casting is conducted. It can be known from the method that the difference value range of the practical content of the chemical components in molten steel and the target content is reduced, deviation of the chemical components of molten steel in the last melt and the next melt in the continuous casting process can be reduced, and therefore the chemical components of tundish melting in 80% or more of the melts can be basically the same, the actual content of C, the actual content of Si, the actual content of Mn, the actual content of Cr and the actual content of V are controlled in the corresponding range of the target content +/- 0.01%, and component evenness on the cross section of the medium-and-high-carbon wheel steel continuous casting round billet can be better controlled.

The invention discloses an aluminum-scandium alloy sputtering target material and a preparation method thereof, and belongs to the technical field of high-performance aluminum-scandium alloy target materials. In the aluminum-scandium alloy target material, the content of scandium is 5 at%-50 at%, and the balance is aluminum. The preparation method comprises the following steps of 1, preparing materials; 2, smelting and casting ingots; 3, calcining or rolling; 4, sampling and detecting; 5, milling and cleaning; 6, carrying out vacuum packing. According to the present invention, the aluminum-scandium alloy target material is prepared through a vacuum induction levitation melting furnace and a rapid casting and rapid condensation technology, and the thickness of the prepared aluminum-scandiumalloy target material is 2-35 mm, the density is 99.9%, the scandium content is 5-50 at%, and the balance is the aluminum element. The preparation method is easy to operate, the alloy is uniform, theutilization rate of the expensive metal scandium is high, and the industrial application is facilitated. The characteristics of good component uniformity and good subsequent machinability satisfy therequirements of the semiconductors and the sputtering target materials in the special fields, and the defects in the prior art are overcome.

The invention discloses a heat treatment technology for improving the tissue uniformity of H13 hot working die forged steel. The technology comprises following steps: loading forged H13 steel into a heating furnace, wherein the heating temperature is 860 to 880 DEG C, cooling the H13 steel in the air to the room temperature; then loading the forged steel into the heating furnace, heating to a temperature of 1030 to 1050 DEG C, cooling the forged steel to a temperature of 300 to 400 DEG C in the air; filling the forged steel into the heating furnace for a third time, heating to a temperature of1080 to 1100 DEG C, cooling the forged steel to a room temperature in the air; filling the forged steel into the heating furnace for a fourth time, heating to a temperature of 870 to 890 DEG C, maintaining the temperature for 4 to 6 hours, cooling to a temperature of 720 to 740 DEG C, maintaining the temperature for 6 to 8 hours, secondarily cooling to a temperature not higher than 500 DEG C, taking out the forged steel out of the heating furnace, and cooling the forged steel in the air. Compared with a conventional forging stock annealing treatment, the horizontal impact energy is not less than 12J; the ratio of horizontal impact energy to vertical impact energy is not less than 0.8; the size of grains in tissues is uniform; the mixed crystal tissue is avoided, banded segregation is reduced or eliminated; and horizontal impact toughness and isotropy are enhanced.

The invention discloses a preparation method of high-strength and high-tenacity nodular cast iron. The high-strength and high-tenacity nodular cast iron is prepared from, by mass, 3.6%-3.8% of C, 3.5%-3.8% of Si, 0.4%-0.6% of Mn, 0.01%-0.04% of Sn, 0.4%-0.6% of Ni, 0.3%-0.4% of Ti, 0.04%-0.01% of Sb, 0.02%-0.04% of RE, 0.16%-0.2% of P, no more than 0.02% of S, and the balance Fe and inevitable impurities. The tensile strength of the nodular cast iron is 1050-1180 MPa, the yield strength of the nodular cast iron is 780-820 MPa, the ductility of the nodular cast iron is 15%-16%, the nodularity of the nodular cast iron is 95%, and all properties of the nodular cast iron are excellent.

The invention discloses a homogenization heat treatment method of an as-cast zinc-aluminum alloy material, which comprises: performing the homogenization heat treatment of a cast ingot which comprises 25.0 to 28.0 weight percent of Al, 2.0 to 2.5 weight percent of Cu, 0.015 to 0.020 weight percent of Mg, less than 0.07 weight percent of Fe, less than 0.04 weight percent of Pb, less than 0.003 weight percent of Cd, less than 0.002 weight percent of Sn and the balance of Zn at a heating temperature of 330 to 360 DEG C, keeping the temperature for 8 to 24 hours and cooling the cast ingot with the furnace. In the invention, the technical method is simple; the operation is convenient; the uniformity of the structural constituents of the zinc-aluminum alloy casting is improved effectively, and the plasticity and size stability of the zinc-aluminum alloy casting are improved; by improving the solid solution degree of the Cu element in a substrate, the size and performance stability of the material are improved; the dendritic segregation and unbalance eutectic phase are improved to a maximum degree, the uniformity of the material structure is improved and the plasticity of the alloy is improved; and the method is suitable for industrial production, and can improve the mechanical performance of the as-cast aluminum alloy and expand the application range of the as-cast aluminum alloy.

The invention discloses a preparation method of an indium-tin alloy target material. The preparation method specifically comprises the following steps that metal indium and metal tin are put into a crucible, heated to be melted, and stirred until the melt components are uniform; the melt is subjected to casting and molding to obtain an indium-tin alloy cast ingot; the indium-tin alloy ingot is rolled to obtain an indium-tin alloy blank; the indium tin alloy blank is machined into a rough target blank with the thickness larger than the target size, and the binding face of the rough target blankis machined to be smooth; and a matched back plate and the rough target blank are heated and subjected to heat preservation at the temperature lower than the critical melting point of the rough target blank, then the back plate and the rough target blank are attached and clamped and gradually cooled to the room temperature, and after binding is qualified, the rough target blank is machined to thetarget size. By means of the method, the indium-tin target materials can be rapidly produced in batches, no melting medium exists between the target blank and the back plate, the target blank is highin purity, uniform in grain size and small in granularity, the average granularity ranges from 100 micrometers to 150 micrometers, the component uniformity is good, the indium-tin component deviationis smaller than +/-0.5%, and the sputtering effect is good.