95 results about "Al content" patented technology

The invention belongs to the technical field of metallurgy, and particularly relates to a production method of fine grains of steel for high-carbon grinding balls, which comprises the following steps: 1) controlling part of chemical components in the steel: controlling the content of Al to be 0.025-0.040%, the content of Mn to be 0.65-0.80% and the content of Cr to be 0.60-0.90% in percentage by weight; (2) the binary alkalinity of LF refining slag is controlled to be 4.5-6.0, the nitrogen content of molten steel after RH refining is 26-38 ppm, and (3) the final rolling temperature of continuous rolling is controlled to be 950-1000 DEG C. According to the method, the technical requirements of steel for large-specification high-carbon steel wear-resistant steel balls are met, the requirement for fine grains of the grinding ball steel at the grade of 7 or above is met, and meanwhile the requirement for high hardenability of the grinding ball steel and the requirement for low-grade inclusions are also met.

To provide a copper alloy excellent in conductivity while having a sufficiently large elastic deformation amount with a low Young's modulus and unlikely to cause a plastic deformation even under a large deformation.SOLUTION: A copper alloy has a composition including 15-57 mass% Zn, 12 mass% or less Al, satisfying A+5×B≥30 and A+3.5×B≤57 in which the Zn content is A mass% and the Al content is B mass%, and a balance Cu with inevitable impurities. A volume fraction in a β phase is 50% or more. an average of KAM (Kernel Average Misorientation) values of the β phase is 2.0° or less obtained when a measurement area of 1 mm2 or more is measured at a measurement interval 1 μm step by an EBSD method and measured excluding a measurement point with a CI value of 0.1 or less analyzed by data analysis software OIM.SELECTED DRAWING: None

The invention belongs to the technical field of metal materials, and relates to a CoNiVAlX (x is greater than or equal to 0 and less than or equal to 0.5) multi-principal-element heterostructure entropy alloy system and a preparation method thereof. The chemical composition (atomic percent) of the alloy contains Co, Ni, V, Al and a trace regulator, flexible matching of strength and toughness is realized in a wide temperature range of-263 DEG C to 800 DEG C by regulating the Al content and a thermal mechanical treatment process, and various mechanical states such as'high ductility-medium strength 'and'high strength-medium ductility' can be obtained; the preparation process is based on a mature metallurgical technology and does not depend on special equipment, and large-size stable preparation can be achieved. Tests prove that the alloy system is wide in toughness and adjustable, the toughness balance in a wide temperature range is realized, the application requirements in an extreme environment are met, and the alloy system has a good industrial popularization prospect.

Provided is a surface-coated cutting tool including a complex carbonitride layer on the tool body, wherein a ratio of crystal grains having a NaCl type face-centered cubic structure is 80 area % or more, xavg and yavg satisfy 0.60≤xavg≤0.90 and 0.000≤yavg≤0.050, respectively, a composition of the Ti—Al complex carbonitride layer being represented by (Ti1-xAlx)(CyN1-y), the xavg being an average of x that is an Al content in a total content of Al and Ti, and the yavg being an average of y that is a C content in a total content of C and N, the crystal grains having the NaCl type face-centered cubic structure include crystal grains in which the x repeatedly increases and decreases, the crystal grains include 10 to 40 area % of crystal grains G1 having an average distance of 40 to 160 nm and crystal grains Gs having an average distance of 1 to 7 nm.

The invention relates to a giant dielectric barium titanate-based ceramic dielectric material and a preparation method and application thereof, the giant dielectric barium titanate-based ceramic dielectric material comprises barium titanate and doping elements, and the doping elements are composed of Mg, Ca, RE, Al and Si; the content of barium titanate is 90 to 99.7 mol%, the content of Mg is 0.1 to 4 mol%, the content of Ca is 0.25 to 0.55 mol%, the content of RE is 0.1 to 3.5 mol%, the content of Al is 0.002 to 0.3 mol%, and the content of Si is 0.01 to 4.0 mol%. The ceramic dielectric material provided by the invention has the advantages that the average grain size is small, the room-temperature dielectric constant is greater than 10 < 4 > order of magnitude, the dielectric constant is giant, the dielectric stability in a wide temperature range is good, and the resistivity is greater than 10 < 9 > omega.cm; the traditional solid-phase method process is adopted, and is suitable for large-scale industrialization.

Provided is a copper alloy having a composition containing 15 to 57 mass% of Zn, containing 12 mass% or less of Al, and having a Zn content of A mass% and an Al content of B mass% where A + 5 × B ≥ 30 and A + 3.5 × B ≤ 57 are satisfied, with the balance being Cu and unavoidable impurities. The copper alloy has a β-phase volume fraction of 50% or greater, the average value of Kernel average misorientation (KAM) values of the β phase is 2.0° or less, said average value having been obtained by measuring a measurement area of 1 mm2 or greater using an EBSD method at measurement intervals of 1-μm steps and excluding measurement points at which a CI value obtained by being analyzed using data analysis software OIM is 0.1 or less. The copper alloy has excellent conductivity, a low Young's modulus, and a sufficiently large elastic deformation amount, and is not likely to plastically deform even when subjected to significant deformation.

The invention belongs to the technical field of alloy content detection, and particularly relates to a method for accurately detecting the Al content of high-manganese and high-aluminum steel by using a direct-reading spectrum instrument. According to the method, the high-purity and high-homogeneity high-manganese and high-aluminum steel standard sample is prepared through vacuum carbon deoxidation smelting, high-temperature homogenization treatment and high-temperature solution treatment; the method comprises the following steps: preparing a high-manganese high-aluminum steel standard sample solution and a series of Al concentration standard solutions, and accurately measuring the Al content of the high-manganese high-aluminum steel standard sample by using an ICP-AES instrument; exciting the high-manganese and high-aluminum steel standard sample by using a direct-reading spectrum instrument to obtain the spectral line intensity of the Al element when the Al contents are different; and finally, according to the measured Al content and the spectral line intensity of Al, establishing a working curve of the Al content in the direct-reading spectrometer. According to the method, the problem that the Al content of the high-manganese and high-aluminum steel cannot be accurately measured by a direct-reading spectrum instrument is solved, the repeatability and the stability of a measurement result are good, the requirement for rapid analysis in the production smelting process is met, and a guarantee is provided for industrial production of the high-manganese and high-aluminum steel.

This invention discloses a continuous gradient Cr-Al coating for zirconium alloy cladding and its preparation method, belonging to the field of nuclear zirconium alloy coating technology. The method of this invention first pre-activates the zirconium alloy cladding surface with Cr ions, followed by depositing a Cr-Al coating with a continuous gradient composition. This process involves maintaining the bias voltage of the Cr target source at 3000-5000V, and increasing the bias voltage of the Al target source from 0V to 3000-5000V in 3-15 increments, with an interval of 20-140 minutes between each increment and an increment of 200-1000V. This results in a region where the Cr content continuously decreases and the Al content continuously increases from the interface between the Cr-Al coating and the Cr-ion-preactivated zirconium alloy cladding surface to the outer surface of the Cr-Al coating. This method solves the problem of existing methods easily leading to damage to the internal structure of the coating.

According to an embodiment of the present invention, the non-oriented electrical steel sheet comprises, by weight %, 1.5 to 5.0% Si, 0.1 to 2.0% Al, 0.1 to 2.0% Mn, 0.001 to 0.08% Sn, 0.001 to 0.08% Sb and 0.0002 to 0.0007% B, with the balance being Fe and unavoidable impurities. When the elemental content is measured along the thickness direction of the steel sheet in a surface portion ranging from the surface to the interior in a range of 0.3 to 1 μm, the weight ratio of the maximum Si content to the maximum Al content is 25 or less.

Provided is a method for producing a TiAl-based alloy by sintering a mixed raw material powder comprising a Ti powder and an Al powder as main raw materials, the method being characterized in that: the TiAl-based alloy is produced by heating at a heating rate of 10 DEG C or less per minute within a predetermined temperature range between 550 DEG C and 750 DEG C; or the isothermal holding time is set while the temperature is increased by stages, and the alloy with the Al content ratio at any 0.5 mm * 0.5 mm section in the sintered body being within + / -3 at% of the Al component ratio in the mixed raw material powder is obtained.

Provided is a plated steel sheet provided with a base material steel sheet and a plating layer formed on the surface of the base material steel sheet, the plating layer having a prescribed chemical composition, the plating layer comprising an Fe-Al phase located at the interface with the base material steel sheet and a main layer located on the Fe-Al phase, and in the cross section of the main layer, the thickness of the Fe-Al phase is greater than that of the main layer, and the thickness of the Fe-Al phase is greater than that of the main layer. The surface area ratio of an Mg-Al-Zn-Si intermetallic compound phase having an Al content of 10% by mass or more is 0.010% or more, the Fe-Al phase contains, in mass%, 3.0-15.0% of Si and 2.0-15.0% of Zn, and the amount of the plating layer deposited on each surface is 20 g / m2 or more.

A non-oriented electrical steel sheet according to an embodiment of the present invention contains, in wt%, 1.5-5.0% of Si, 0.1-2.0% of Al, 0.1-2.0% of Mn, 0.001-0.08% of Sn, 0.001-0.08% of Sb, and 0.0002-0.0007% of B, with the remainder comprising Fe and inevitable impurities, wherein, when the content of elements is measured in a surface region, extending 0.3-1 µm from the surface toward the inside of the steel sheet, along the thickness direction of the steel sheet, the weight ratio of the Si content to the Al content at the point where the Al content is greatest is 25 or less, and the difference in the maximum intensity of <111> / ND when the steel sheet before and after stress relief annealing is measured through EBSD is at most 3.

The application provides 800MPa-grade hot-dip aluminized silicon high-hole-expanding multiphase steel and a preparation method thereof. The composition of the steel plate is as follows in terms of percentage by weight: C: 0.06% to 0.09%, Si: 0.1% to 0.4%, Mn: 1.8% to 2.5%, Cr: 0.1% to 0.4%, Mo: 0.05% to 0.3%, Ti: 0.01% to 0.03%, Nb: 0.01% to 0.03%, P: less than or equal to 0.02%, S: less than or equal to 0.005%, 1 / 3: less than or equal to Mo / Cr: less than or equal to 2 / 3, 2.2%: less than or equal to Mn+Cr: less than or equal to 2.8%, and the balance of Fe and inevitable impurities. The chemical composition of the coating includes the following components in terms of percentage by weight: Al content: 88% to 93%, and Si content: 7% to 12%. The production method of the steel plate comprises a series of processes such as smelting, hot rolling, pickling, cold rolling, continuous annealing and aluminized silicon plating, and the structure of the steel plate comprises ferrite, bainite and martensite. In terms of the planar area method, the ferrite content is 18% to 35%, the bainite content is 35% to 62%, and the martensite content is 10% to 40%. The mechanical properties of the steel plate of the application are as follows: tensile strength is more than 800MPa, yield strength is 620MPa to 750MPa, elongation is greater than 14%, and the hole-expanding value is more than 50%, so that the steel plate has good strength and plasticity and formability, and meanwhile, the hole-expanding performance is excellent.

The present invention provides a steel material that provides high strength and excellent low-temperature toughness for machine structural components. The steel material of this disclosure has a chemical composition, by mass%, of C: 0.20-0.48%, Si: 0.20-1.30%, Mn: 0.80-2.00%, P: 0.050% or less, S: 0.010-0.090%, Cr: 0.05-0.50%, V: 0.05-0.30%, Ti: 0.0001-0.0055%, Al: 0.005-0.050%, N: 0.003-0.030%, Ca: 0.0001-0.0050%, and O: 0.0030% or less, with the remainder being Fe and impurities, and has a number density ND of coarse inclusions with an equivalent circle diameter of 3.0 μm or more of 0.70 inclusions / mm². 2 The following conditions must be met: Among the coarse inclusions, the number percentage NR of coarse specific inclusions that satisfy formula (1) in terms of mass %, such as Mn content, Al content, Ti content, and V content, is 75% or less. (Mn+Al) / (Ti+V)<0.30 (1)

The invention discloses a preparation method of a high-yield ratio die steel CX13-8. The high-yield ratio die steel comprises the following chemical components in weight percentage: C content ≤0.05%, Si content ≤0.18%, Mn content ≤0.10%, S content ≤0.008%, P content ≤0.018%, Cr content 12.25%-13.25%, Ni content 7.50%-8.50%, Mo content 2.00%-2.60%, Al content 0.90%-1.35%, and the balance is Fe. During the preparation, the high-yield ratio die steel is smelted in an induction vacuum degassing furnace + argon protection electroslag method to meet the purity requirements of the die steel. The final forging adopts low-temperature large deformation forging to refine the grains. After solid solution + aging heat treatment, the high-yield ratio die steel meets the standard requirements of CX13-8. The high yield ratio can achieve lightweighting of the die material.

The application discloses a kind of superhard anti-cavitation high-entropy alloy coating and preparation method thereof.The atom percentage of the superhard high-entropy alloy coating described herein is: Al 20%~26%, Cr 30%~34%, Co 30%~34%, Ni 16%~22%.The high-entropy alloy coating of the application can maintain solid solution stability under the condition of higher Al content, and will not appear element desorption and heterogeneous nucleation during powdering and spraying process.The crystal structure is single body-centered cubic phase (BCC), and can have very high hardness without any post-processing process: nano-hardness can reach 9.1~11.4 GPa, and microhardness is 858~881 HV 0.1 , which is the maximum value of high-entropy alloy coating prepared by the same process reported in China at present, and is suitable for popularization and application as anti-cavitation coating on the surface of various flow mechanical components.

The invention provides a waste power battery ternary leachate one-step impurity removal treatment method, which comprises the following steps: introducing a part of an aluminum source, controlling the Al / F molar ratio in a solution system to be greater than or equal to 4, adding an alkali source to adjust the pH value, and carrying out precipitation treatment, so that one-step precipitation impurity removal of Fe, Al and F can be realized, Ca, Mg and other elements are not introduced, in the liquid subjected to one-step impurity removal, the F content is lower than 100mg / L, the Fe content is lower than 10mg / L, the Al content is lower than 10mg / L, and the impurity removal rate is lower than 10mg / L; the method has the advantages of simple operation, simple equipment, low energy consumption, no pollution and the like.

The invention discloses a brazing method for increasing the service temperature of a brazed joint and reducing the stress of the joint, and belongs to the technical field of welding. According to the method, a nonmetal base material, an aluminum alloy and SnZn hypereutectic brazing filler metal are pretreated and assembled into a sandwich structure, and then three-step ultrasonic-assisted brazing is carried out, specifically, in the first stage, an oxidation film is broken to achieve initial connection, in the second stage, unbalanced dissolution of the aluminum alloy is induced to enable the Al content of a brazing seam to be sharply increased, and in the third stage, Al diffusion densification is promoted. According to the mechanism, ultrasonic cavitation and acoustic streaming effects are utilized, the brazing seam melting point is increased through unbalanced dissolution of Al, the thermal expansion coefficient is reduced, low-temperature connection and high-temperature service are achieved, and residual stress is reduced. The method is simple in process, low in cost and suitable for connection of various non-metals and aluminum alloys, and the strength, heat conductivity and reliability of the connector can be improved.

A zinc-plated steel sheet for hot stamping includes a steel sheet having a predetermined chemical composition and a zinc plating film disposed on the steel sheet. In the zinc plating film, the plating adhesion amount is 15.0 g / m2 or more and less than 40.0 g / m2, the Fe concentration is 1.5 mass % or more and 8.0 mass % or less, the Al content is 100 mg / m2 or more and 400 mg / m2 or less, the Al concentration is 0.50 mass % or more and 3.00 mass % or less, and the remainder consists of Zn and impurities.

A system (1000) including a computer (200) estimates the content of a specific chemical element in molten material available at an opening (110) of a metallurgical vessel (100). In the system (1000), a pyrometer (140-P) monitors the opening (110) and provides radiation data (150-P) representing thermal radiation from the molten material (300) at the opening (110) for at least two wavelengths (λ1, λ2). The computer (200) processes the radiation data (250) to estimate the content using a pre-trained estimation module (250). Because phenomena (160) at the opening (110), such as deposits, fumes, or reflections, can interfere with the estimation, the system (1000) further includes a camera (140-C) monitoring the opening (110 and an image classification module (260) for identifying the phenomena (160). The computer (200) obtains a phenomenon-based reliability classification (RC) and improves the overall estimation accuracy by filtering reliable emission data from being processed or ignoring content based on unreliable emission data.

To suppress poor inflow of mold powder.SOLUTION: When steel having a dissolved Al content of 0.3 mass% or more and a Ca content of less than 10 ppm is subjected to continuous casting, a range of Al2O3 content in mold powder inside a mold, in which poor inflow of the mold powder does not occur, is determined by using a consumption amount of the mold powder, and values of A, B, and a to d satisfying the following equation are determined when the Al2O3 content X (mass%) is within the determined range of the Al2O3 content: 20.33A+0.58×(7000a-0.00079b-0.00067c-0.038d+9.63)+13.75B=X, wherein A: dissolved Al content (mass%) in molten steel, B: casting speed (m / min), a: Ca content (mass%) in the alloy added to molten steel until completion of secondary refining, b: amount of oxygen gas (Nm3) supplied to molten steel during secondary refining, c: circulation gas flow rate for molten steel (NL / min) during secondary refining, and d: circulation time (min) for molten steel during secondary refining.SELECTED DRAWING: None

This application provides a steel material with ultra-high strength of 2000MPa and above, a hot gas expansion tube component, a welded pipe, and a manufacturing process. The component, welded pipe, and steel material, by mass percentage, contain: C: 0.35~0.50%, Mn: 0.20~1.20%, Si: 0.25~0.85%, Cr: 0.20~0.70%, Al: 0.25~0.65%; the sum of Si, Cr, and Al content is 1.0~2.2%, and (Si+Cr) / Al is 2.0~3.5; the thickness t, alloying elements, and critical cooling rate v of the component, welded pipe, or steel material are also specified. C Satisfies the formula: , v C With a temperature range of 10~21℃ / s, the hot gas expansion tube component of this invention possesses ultra-high strength and good toughness.

The invention relates to the technical field of high-temperature alloy metallurgy preparation, in particular to an additive manufacturing nickel-based high-temperature alloy with high Al and Ti content and a preparation method of the additive manufacturing nickel-based high-temperature alloy. The additive manufacturing nickel-based high-temperature alloy comprises the following components in percentage by weight: 17-19% of Cr, 5-8% of Co, 5-7% of W, 3.5-4.5% of Mo, 3-5% of Al, 1-1.6% of Ti and the balance of Ni. According to the method, firstly, the Al content in a nickel-based superalloy system is adjusted, alloy powder for additive manufacturing is prepared, then fusion covering of the alloy is conducted, finally heat treatment is conducted, Al is introduced into the nickel-based superalloy through ball milling, the content is designed, the tensile strength of the obtained additive manufacturing nickel-based superalloy at 900 DEG C can reach 570 MPa or above, and the performance is improved by 70% or above. Meanwhile, the component design alloy is suitable for additive manufacturing, no crack exists in an alloy sample for metallographic observation, and manufacturing defects are reduced.

The invention discloses a method for improving the obdurability of a Zn-2. 7Mg alloy by using an aluminum element, and the problem that the toughness of the Zn-2. 7Mg alloy is relatively low is solved by adding Al particles in the smelting process of the Zn-2. 7Mg alloy. And the Al content is controlled to be 3% or below, the alloy melting point is low, the melt viscosity is moderate, and the die-casting alloy requirement can be met. By adding the Al element, solid solution strengthening can be generated, the plasticity and toughness of the alloy can be improved, grains can be refined, segregation of Mg can be reduced, and therefore the uniformity of the alloy is improved. In the smelting process, the aluminum element and the magnesium element are added at a proper time, the oxidation burning loss of zinc and magnesium can be reduced, more ternary eutectic structures and a small amount of aluminum phases are obtained in the zinc alloy, and therefore the obdurability of the alloy is improved. Along with the increase of the addition amount of the aluminum element, the primary zinc phase in the zinc alloy is continuously reduced and refined, and the ternary eutectic and the aluminum phase are gradually increased, so that the strength, plasticity and toughness of the die-cast zinc-magnesium alloy can be remarkably improved.

A conductor for a power transmission cable has a first conductor element and a second conductor element connected by a welding joint. The welding joint has a welding material alloy where the welding material alloy has an Al content of from 90% to 98% by weight, a Ni content of from 2% to 8% by weight, and a content of other metals and / or substances from 0% to 2% by weight, based on the total weight of the welding material alloy, wherein the Al content, Ni content and content of other metals and / or substances sum up to 100% by weight.

The application discloses high-sulfur steel, including components and mass percentage: C: 0.67%-0.73%, Si: 0.15%-0.25%, Mn: 0.45%-0.65%, P: ≤0.045%, S: 0.060%-0.070%, Cr: 0.10%-0.20%, Mo: ≤0.06%, Ni: ≤0.20%, V: 0.03%-0.04%, Al: ≤0.03%, N: 0.012%-0.016%, the balance is Fe and impurities.The application provides a preparation process of high-sulfur steel, including the following steps: step S1, converter process; step S2, refining process; step S3, VD process; step S4, continuous casting process.The beneficial effect is that the Al content in the steel is controlled at a relatively high level to offset the secondary oxidation caused by the addition of quartz sand at the end of the refining, that is, the low oxygen state in the steel is ensured by Al.

This invention discloses an analytical method for Zr and Al content in tungsten-copper alloys based on ICP-OES, belonging to the technical field of elemental content analysis methods. The analytical method includes: pretreating the tungsten-copper alloy sample with concentrated nitric acid, hydrofluoric acid, hydrogen peroxide, and boric acid to obtain an analytical solution, and simultaneously preparing a blank analytical solution; preparing a series of standard solutions using a mixed aluminum and zirconium standard solution; and sequentially measuring the mass concentrations of zirconium and aluminum in the analytical solution using ICP-OES. This invention fills the gap in current standards for Zr and Al detection in tungsten-copper alloys, providing an accurate and efficient analytical method for material development, production quality control, and performance evaluation.

The invention discloses an AlCrN coating, a preparation method of the AlCrN coating and a tool. The preparation method comprises the following process steps that S1, a base body is cleaned; s2, vacuumizing and heating the coating chamber; s3, inert gas and hydrogen are introduced, and the surface of the base body is cleaned and subjected to hydrogen etching; s4, stopping introducing hydrogen, introducing inert gas, and performing lateral ion etching on the surface of the substrate; and S5, two sets of powder metallurgy CrAl targets are started, the content of Cr in the target materials is 40 at.%, the content of Al in the target materials is 60 at.%, inert gas and nitrogen are introduced, the AlCrN coating is prepared through deposition, the substrate bias voltage is 40-180 V, the bias voltage frequency is 10-40 kHz, the bias voltage duty ratio is 50%-90%, the cathode peak power is 5-30 KW, the cathode peak current is 220-600 A, and the cathode pulse width is 80-180 microseconds. According to the preparation method, the AlCrN coating is obtained through parameters of the integrated cathode, the number of liquid drops is effectively reduced, pits in the surface of the coating are reduced, the high-temperature-resistant stability and the oxidation resistance of the coating are improved, and the abrasion resistance and the adhesion resistance of the coated cutting tool are improved.

This invention discloses a multi-structured coating, its preparation method, and its application. The coating comprises a TiAlN substrate, an AlTiN gradient layer with increasing Al content, an AlTiN / TiSiN nanolayer, and a TiSiN nanocomposite layer, sequentially connected. The substrate is connected to the substrate. The AlTiN gradient layer with increasing Al content is immediately connected to the TiAlN substrate. The AlTiN / TiSiN nanolayer is a nano-multilayer structure composed of alternating AlTiN and TiSiN layers. The TiSiN layer is a nanocomposite structure composed of nanocrystalline embedded amorphous substrate. The total thickness of the coating is controlled between 1.0 and 6.0 μm. The multi-structured coating exhibits a bonding strength of 65–120 N with the substrate, a nanohardness of 32–35 GPa, and a fracture toughness of 5.9–10 MPa·m. 1 / 2 It has strong toughness and corrosion resistance, and high bonding strength. Its coated tools have a cutting life that is much longer than that of traditional AlTiN coated tools.

The black composite oxide particles according to the present invention contain Fe, Mg, and Al as metal components, and satisfy 42 < = W1 < = 60, 4 < = W2 < = 11, and 4 < = W3 < = 11, where W1 wt% is the Fe content, W2 wt% is the Mg content, and W3 wt% is the Al content, and the half-value width of a diffraction peak based on a (311) plane representing a spinel structure in X-ray crystal structure analysis is 0.100-0.190 DEG (inclusive). And further contains from 5 ppm to 100 ppm (inclusive) of C1.