162 results about "Mo element" patented technology

The invention discloses 700Mpa-grade hot-rolled wheel steel and a preparation method thereof, and belongs to the technical field of metallurgy. The steel for the wheel comprises the following chemical components in percentage by mass: less than or equal to 0.1% of C, 0.05-0.10% of Si, less than or equal to 1.65% of Mn, less than 0.015% of P, less than 0.005% of S, less than 0.060% of Nb, less than 0.020% of Ti, less than 0.03% of Cr, less than 0.045% of A1s, less than 0.005% of N, less than 0.003% of O and the balance of iron and inevitable impurities. The production method comprises the procedures of molten iron pretreatment, converter smelting, LF refining, RH refining, slab continuous casting, heating, rolling, laminar cooling and coiling. Under the condition that expensive Mo element is not added, through reasonable component design and a controlled rolling and controlled cooling process, the yield strength of the wheel steel is larger than or equal to 500 MPa, the tensile strength is larger than or equal to 680 MPa, the ductility is larger than 18%, and the wheel steel has good welding performance and machining performance.

The invention discloses a high-entropy oxide composite negative electrode material as well as a preparation method and application thereof, and relates to the technical field of all-solid-state lithium battery negative electrode materials, and the high-entropy oxide composite negative electrode material comprises a metal element and an oxygen element, the high-entropy oxide composite negative electrode material comprises a metal element and an oxygen element, wherein the metal elements are at least five of a chromium element, an iron element, a nickel element, a manganese element, a molybdenum element, a copper element and a cerium element; the molar ratio of the metal element to the oxygen element is 3: 4; the high-entropy oxide composite negative electrode material is of a spinel structure. According to the prepared high-entropy oxide composite negative electrode material, the problems that a traditional negative electrode material is unstable in structure, poor in interface contact and short in cycle life are solved, the electrochemical performance is improved, and an all-solid-state lithium battery prepared from the high-entropy oxide composite negative electrode material shows high reversible specific capacity and excellent cycle stability.

The invention belongs to the technical field of ferrous metallurgy and high-strength wear-resistant materials, and discloses large-thickness high-toughness NM550 wear-resistant steel and a preparation method thereof. Nb, Ti and V are cooperated according to the mass ratio of 1: 1: 2 to form a multi-element nano carbide (Nb, Ti, V) C main strengthening phase with the average particle size of 5-50 nm; in the controlled rolling and austenitizing stages, Cr and Mo elements form fine carbides, a main strengthening phase is induced to be separated out preferentially, and cluster aggregation is prevented; al initial deoxidation and Ce and Ca composite denaturation treatment are adopted to form spherical Ce-Ca-Al-O composite oxide inclusions, and the average particle size is smaller than or equal to 2 microns. By adopting clean smelting, uniform-temperature heating, temperature-controlled rolling, three-stage flow-regulating water cooling and two-stage tempering treatment, uniform regulation and control and multi-scale strengthening of the structure are realized. The yield strength is greater than or equal to 1400 MPa, the tensile strength is greater than or equal to 1850 MPa, the ductility is greater than or equal to 15%, the ballistic work at-20 DEG C is greater than or equal to 40 J, and the surface hardness is greater than

Provided herein are low resistance metallization stack structures for 3D-NAND applications and related methods of fabrication. In some embodiments, thin metal oxynitride nucleation layers are deposited on dielectric material followed by deposition of a pure metal conductor using process conditions that increase non-molybdenum component element content at the oxynitride-dielectric interface. Certain embodiments of the methods described below convert less than all of the metal oxynitride nucleation layer to a pure metal layer, further lowering the resistivity.

The invention relates to the technical field of research and development of low-temperature bolt steel, and discloses a low-temperature impact performance control process for low-temperature bolt steel. Comprising the steps that S1, in the steelmaking refining stage, purity and uniformity control is conducted, S2, casting blank homogenization treatment is conducted, stress relief and structure regulation are conducted, S3, a heat treatment core process is conducted, structure and toughness balance regulation is conducted, and S4, online detection and dynamic feedback are conducted, and performance stability is guaranteed. By accurately controlling the element proportion of carbon (C), silicon (Si), manganese (Mn), chromium (Cr) and molybdenum (Mo) in steel and combining with an optimized heat treatment process (such as 860 DEG C oil quenching and 640-650 DEG C high-temperature tempering, and the heat preservation time is prolonged to 120 minutes or more), the V-shaped notch impact energy of the material in the environment of-101 DEG C stably reaches 35 J or more, the impact energy of part of samples can reach 50 J or more, and the impact energy of the part of samples can reach 50 J or more. The problem that the low-temperature impact performance is insufficient after wire hardening and tempering is thoroughly solved, and it is ensured that the brittle failure resistance of the bolt is remarkably improved in the ultralow-temperature environment.

A duplex precipitation-strengthened ultra-high strength and toughness stainless steel, wherein the duplex precipitates include NiAl nano-scale precipitates and M2C nano-scale precipitates. M in M2C is mainly Mo element, and also contains metal elements such as Cr and Ni. The NiAl nano-scale precipitates and M2C nano-scale precipitates are both promoted by Co to precipitate and are diffusely distributed in the lath martensite microstructure with a high dislocation density. The ultra-high strength and toughness means that the test results according to national standards GB / T 228.1-2018 and GB / T 21143-2014 are as follows: tensile strength ≥ 1900 MPa, elongation ≥ 10.0%, fracture toughness ≥ 70 MPa·m1 / 2. It is characterized in that it includes the following chemical element components and their wt% contents: C = 0.12 - 0.40%, Cr = 8.0 - 14.0, Ni = 7.0 - 17.0, Mo = 0.80 - 1.60, Al = 0.6 - 3.1, Co = 7.0 - 15.5, W = 0.35 - 0.75, Si ≤ 0.10%, Mn ≤ 0.10%, P ≤ 0.0050%, S ≤ 0.0015%, Fe = the balance.

The invention relates to the technical field of preparation of high-entropy ceramics, and discloses a method for preparing compact high-entropy carbide ceramics, Ti3AlC2, TiC, VC, NbC, TaC and Mo2C are mixed and charged, then sintering is carried out, and the high-entropy carbide ceramics TiVNbTaMoCx are obtained after sintering is completed. In Ti3AlC2, TiC, VC, NbC, TaC and Mo2C, the molar ratio of Ti element to V element to Nb element to Ta element to Mo element is 1: 1: 1: 1: 1. According to the method, the density of the high-entropy carbide ceramic is improved by adopting a simple method, the process is simple and convenient, the production period is short, the raw materials do not need to be subjected to complex pretreatment, the preparation energy consumption and cost are remarkably reduced, and a new way is provided for large-scale preparation of the high-performance high-entropy ceramic material.

The present invention provides a Q690D steel plate with high and low temperature impact toughness and a production method thereof. The Q690D steel plate with high and low temperature impact toughness is designed with low-C steel, and Nb, V, and Ti elements are added to improve the strength of the steel plate; Cr and Mo elements improve hardenability, and P, S, N, and impurity elements are strictly controlled. The production method of the Q690D steel plate with high and low temperature impact toughness includes the following technological steps: hot metal pretreatment, converter steelmaking, post-furnace argon blowing, LF steel refining treatment, RH steel refining treatment, slab continuous casting, slab heating, descaling, rough rolling, finish rolling, preliminary straightening, ultra-fast cooling process, straightening, cooling bed, tempering, sampling, steel plate inspection, marking and warehousing. The Q690D steel plate produced by the present invention has high strength, excellent comprehensive properties such as plasticity, toughness, bending, and welding, and meets the use requirements of users.

The invention discloses a 980MPa-grade steel plate with a high bake hardening value, which contains Fe and inevitable impurities, and also contains the following chemical elements in percentage by mass: 0.15-0.25% of C; 0.5 to 1.7 percent of Si; mn: 1.50 to 2.50%; 0.03% to 0.80% of Al; 0 < B < = 0.001%; the 980 MPa grade steel plate does not contain Nb, V, Ti, Cr and Mo elements. The microstructure of the 980 MPa grade steel plate comprises at least one of retained austenite, martensite, tempered martensite and partition martensite, and the total area proportion of the retained austenite, the martensite, the tempered martensite and the partition martensite is not lower than 50%. The dislocation density of the martensite, the tempered martensite and the partition martensite is not lower than 0.7 * 10 < 15 > / m < 2 >.

The invention provides a secondary battery and an electric device. The secondary battery comprises a pole piece, the pole piece comprises a current collector, the current collector comprises an iron element and a molybdenum element, and based on the mass of the current collector, the mass content of the molybdenum element is 0.1%-20%, and the mass content of the iron element is 50%-99%.

The utility model discloses equipment for recovering molybdenum element in liquid phase, which relates to the technical field of heavy metal wastewater treatment, and comprises a reaction kettle and a reaction cavity, the reaction cavity is arranged in the reaction kettle, a liquid inlet pipe is arranged on the outer side of the reaction kettle and is communicated with the reaction cavity, a dripping pipe is arranged at the top of the reaction kettle in a penetrating manner, and the dripping pipe is communicated with the reaction cavity. Wherein one end of the dropwise adding pipe is located in the reaction kettle, the other end of the dropwise adding pipe protrudes out of the reaction kettle, and a feeding assembly is arranged in the dropwise adding pipe. And the stirring blades are driven by the stirring shaft to do uniform circular motion to stir the wastewater containing the molybdenum element to enable the wastewater to flow. Meanwhile, the stirring radius of the special-shaped blades is larger than that of the stirring blades, so that the stirring range can be enlarged, the flowability of the wastewater is higher, and the fed precipitation agent reacts with the molybdenum-containing wastewater more sufficiently. Moreover, the special-shaped blades can rotate along with the stirring shaft to change the distance to the stirring shaft under the action of centrifugal force, so that the stirring range is further flexibly adjusted, and the stirring shaft can be reset under the action of the spring when stopping rotating.

This utility model discloses a large-diameter pipe fitting for hydrogen transportation pipelines based on a composite plate, comprising: a tee structure, wherein the tee structure has an internal support structure in contact with each other; this utility model relates to the technical field of large-diameter pipe fittings. The tee structure and support structure are designed with an inner tube made of S31703 stainless steel and an outer tube made of Q345R alloy structural steel. The inner tube, with its high chromium, nickel, and molybdenum elements forming an anti-corrosion barrier, can directly contact the hydrogen medium. The outer tube, as a low-alloy high-strength steel, has both excellent plasticity and structural strength, which can meet the processing requirements of large-diameter pipe fittings such as rolling and stamping. Through the cooperation of the rotating shaft and the support rod, a cross structure is formed by rotating around it. The cooperation of the sliding groove, the sliding plate, and the support threaded rod, combined with the threaded transmission of the throttle handle, can precisely adjust the extension and retraction of the top block, so that it tightly presses against the inner wall of the inner tube, thus playing a supporting role.

The invention discloses a metal ceramic material containing rare metal elements and a preparation method and application thereof.The metal ceramic material comprises a hard phase and a binding phase, the hard phase is bound through the binding phase, and the hard phase comprises a first black core, a second white core and gray ring layers wrapping the first black core and the second white core respectively; the grey ring layer and the second white core are each provided with rare metal elements in a solid solution mode, and the rare metal elements comprise the molybdenum element and the rhenium element. According to the preparation method of the metal ceramic material containing the rare metal elements, the production cost is low, the rhenium element is added in the form of MoRe alloy powder, pre-ball milling and combined sintering are conducted on the rhenium element and binding phase powder, Mo and Re in a binding phase and a hard phase are evenly distributed, a uniform organization structure is obtained, the abrasion resistance and toughness of metal ceramic are improved, and the service life of the metal ceramic material is prolonged. And the metal ceramic material has better reliability and durability in application.

The present invention discloses a molybdenum-containing heat-conducting austenitic manganese steel and a preparation method thereof, which relates to the technical field of molybdenum-containing manganese steel and comprises the following processes: mixing pig iron and pure iron and melting them; adding ferrochrome, ferromanganese, ferromolybdenum, ferrotitanium, ferroniobium and chromium nitride, and continuing to melt to form molten steel; discharging the furnace and casting to obtain a blank; and performing heat treatment to obtain austenitic manganese steel. By adding element molybdenum to the manganese steel, carbides are formed with carbon in the manganese steel and are dispersed in the steel, which can optimize the morphology and distribution of carbides in the austenitic manganese steel, reduce defects in the manganese steel, and inhibit dislocation movement, which helps to improve the thermal conductivity of the manganese steel; at the same time, solute atoms around it are depleted, which can further improve its thermal conductivity.

The invention relates to a surface anti-corrosion treatment and coloring method for a stainless steel component. According to the surface anti-corrosion treatment and coloring method for the stainless steel component, pollutants such as impurities and oil stains on the surface of the stainless steel component can be removed through chemical oil removal and alkali corrosion treatment; through oxidation treatment, Cr and Mo elements can be introduced to the surface of the stainless steel component, and a surface passivation layer is formed, so that the corrosion resistance of the stainless steel component is enhanced; and through electrolytic treatment, the stainless steel component is subjected to hole sealing treatment, and the corrosion resistance of the stainless steel component is further enhanced. And through hardening treatment, the corrosion resistance of the stainless steel component is further enhanced. And moreover, the CrO3 concentration and the oxidation treatment duration are adjusted, so that the surface of the stainless steel component subjected to surface treatment can present different colors. According to the surface anti-corrosion treatment and coloring method for the stainless steel component, the anti-corrosion performance of the stainless steel component is greatly improved, the equipment requirement is low, therefore, the treatment cost is low, and the attractiveness of the stainless steel component can be improved.

The application relates to a feed for metal injection molding, a preparation method of the feed and a metal product, wherein the preparation method of the feed comprises the following steps: S1, obtaining the following components according to weight parts: 40-50 parts of Fe elements, 2-8 parts of Ni elements, 20-25 parts of Cr elements, 20-25 parts of Co elements, 2-8 parts of Mo elements, 2-8 parts of Cu elements, 0.1-3 parts of Si elements, 1-3 parts of Mn elements, mixing and then heating to melt the material, and then adopting a high-pressure water-gas combined atomization method to obtain mixed powder; S2, obtaining a forming agent; S3, preheating the mixed powder obtained in S1 under vacuum conditions, then adding the forming agent into the mixed powder for mixing, and then performing plasticizing extrusion granulation to prepare the feed. The feed can meet the size precision requirements of MIM injection, green compact degreasing sintering and related post-process machining, the existing MIM materials on the market cannot simultaneously meet the problem of high polishable hardness, and the obtained metal product has the comprehensive advantages of appearance and hardness.

The invention relates to the technical field of metal additive manufacturing, in particular to a titanium-based composite coating for laser additive remanufacturing and a preparation method and application thereof. The method comprises the following steps: adhering tungsten carbide and nano metal Mo powder by adopting an acoustic resonance technology; the composite coating structure is prepared in a laser directional energy deposition and cold spraying mode; and stress is eliminated through heat treatment. Composite powder with Mo adhered to the surface of tungsten carbide is added into TC4 titanium alloy, and then the titanium alloy composite coating is prepared through the laser directional energy deposition and cold spraying technology. Wherein the adhesion of Mo can effectively promote the transformation of beta phase on one hand, and on the other hand, Mo can be used as a barrier to firstly contact a matrix to reduce the generation of brittle phase and improve the strength and wear resistance of the coating. And through heat treatment, stress concentration of the coating is reduced, the diffusion effect of the Mo element is improved, surface lubrication and abrasion reduction are achieved, and the mechanical property of the titanium alloy composite coating is improved.

Ultrafine-grained W-Mo-Cu composite materials with Mo elements distributed at the W / Cu phase boundary belong to the fields of W-Cu composite materials and powder metallurgy. The ultrafine-grained W phase is uniformly distributed in the Cu matrix, and the added Mo element is dispersed at the W / Cu phase boundary. The Mo content is 2-10 at.%, and the mass percentage of Cu is 20%-40%. The average W phase size can be controlled in the range of approximately 100-400nm. A preparation technology that can control the content of the added components and distribute the added components at the W / Cu phase boundary has been developed. Through this preparation technology, a new ultrafine-grained W-Mo-Cu composite material with ultrafine W grain size and Mo elements distributed at the phase interface has been obtained. This composite material exhibits excellent comprehensive properties in terms of high-temperature stability, strength, plasticity and electrical conductivity.

The invention discloses a perovskite anode catalyst layer material and a preparation method thereof, and belongs to the technical field of ceramic fuel cells. The perovskite anode catalyst layer material is prepared by adopting a plasma-assisted ball milling method, the molecular formula of the perovskite anode catalyst layer material is Sr < 2-x > Fe < 1.5-y > Ru < y > Mo < 0.5 > O < 6-delta >, x is equal to 0.05-0.10, y is equal to 0.05-0.15, and delta is equal to 0.10-0.35. A-site defect and B-site doping are designed on the basis of Sr2Fe1. 5Mo0. 5O6-delta perovskite, and performance breakthrough of the direct ammonia proton ceramic fuel cell at medium and low temperatures is achieved through the synergistic effect. Under the synergistic effect of argon plasma and mechanical force, nano-scale crushing and atomic-scale uniform mixing of raw materials are achieved, a large number of defects and active sites are generated on the surface of powder, subsequent solid-phase reaction activation energy is remarkably reduced, volatilization loss of ruthenium and molybdenum elements at high temperature is inhibited, and stoichiometric accuracy and structural uniformity of a final product are guaranteed.

The invention relates to the field of metal materials and manufacturing thereof, in particular to a seamless steel tube for a high-strength and high-toughness petroleum casing and a manufacturing method thereof.The seamless steel tube comprises, by weight, 0.20%-0.30% of C, 0.25%-0.30% of Si, 1.60%-2.40% of Mn, smaller than or equal to 0.010% of P, smaller than or equal to 0.002% of S, 0.020%-0.060% of Al, 0.06%-0.15% of Nb, 0.020%-0.040% of Ti, 0.04%-0.10% of V, 0.0020%-0.0040% of B, smaller than or equal to 0.0060% of N, 0.001%-0.005% of Ca, 0.20%-0.60% of Cr and the balance Fe and inevitable impurities, the Ti / N ratio is 2-8, the yield strength of the seamless the yield ratio is 0.85-0.92, the microscopic structure is fine tempered sorbite, the longitudinal impact energy of a Charpy V-shaped notch at the temperature of 0 DEG C is larger than or equal to 90 J, and the transverse impact energy of the Charpy V-shaped notch at the temperature of 0 DEG C is larger than or equal to 70 J. The process of high Nb microalloying, precise controlled rolling and controlled cooling and stepped tempering is adopted, Nb serves as the core, the synergistic effect of Ti, V and B elements is optimized, the strict performance requirement of the seamless pipe is met while no Mo element is added, and unified production of the 110-150 ksi-grade high-strength and high-toughness seamless steel pipe is achieved.

The invention discloses a high-strength wind power main shaft bearing and a processing method thereof, and the method comprises the following steps: S1, raw material preparation: a, blank selection: selecting high-strength alloy structural steel containing Cr, Ni and Mo elements as a bearing blank, wherein the content of the Cr element is 1.5%-2.0%, the content of the Ni element is 0.8%-1.2%, and the content of the Mo element is 0.2%-0.5%; high-strength alloy structural steel containing Cr, Ni and Mo is selected as a blank, the Cr element is used for improving abrasion resistance and hardenability, the Ni element is used for enhancing toughness and fatigue resistance, the Mo element is used for improving high-temperature strength and tempering-resistant stability, the performance bottleneck of a traditional material is broken through from the raw material level, meanwhile, through homogenizing annealing in the blank pretreatment stage, the hardness of the blank is improved, and the hardness of the blank is improved. The structure segregation in the blank is effectively eliminated, the uniformity of material components and structures is guaranteed, a stable material foundation is laid for subsequent machining procedures, and local stress concentration and early failure caused by uneven materials are avoided.

The invention relates to the technical field of amorphous alloy, in particular to a Fe-based amorphous alloy strip and a preparation method and application thereof, and the Fe-based amorphous alloy strip comprises the following elements of, by atomic percent, 75%-85% of Fe, 0.5%-4% of Si, 5%-12% of B, 0.1%-4% of P, 0.1%-4% of C, 0.5%-6% of Mo and 0.5%-5% of Ni. The sum of the atomic percentage contents of Fe, Si, B, P, C, Mo and Ni is 100%. According to the invention, the molybdenum element and the nickel element are introduced, so that the Fe-based amorphous alloy strip has high saturation magnetization, and meanwhile, the wear resistance and the toughness are remarkably improved.

Embodiments of the present application provide a martensitic steel and a preparation method therefor, a structural member, and a terminal device. The martensitic steel provided in the embodiments of the present application comprises the Ni element, the Co element, the Mo element, the Nb element, the C element, the Fe element and other trace elements; on the basis of the total mass of the martensitic steel, the mass fraction of the Ni element is 14%-16%, the mass fraction of the Co element is 16%-18%, the mass fraction of the Mo element is 7%-10%, the mass fraction of the Nb element is 0.1%-0.6%, and the mass fraction of the C element is 0.003%-0.1%. On the basis of the element selection of the martensitic steel and the design of the content of each element, the martensitic steel can be prepared by means of a powder molding process such as metal injection molding, and the martensitic steel prepared by means of the described process can have high strength, good toughness, and a preset shape.

The present application belongs to the technical field of electrolytic copper foil manufacturing, and particularly relates to a HVLP copper foil with low surface roughness and a preparation method thereof. The preparation method comprises the following steps: electrolytic foil growth, vacuum annealing treatment, electrochemical grain boundary pinning treatment, surface treatment and drying and slitting. The vacuum annealing treatment is performed after the electrolytic foil growth and before the surface treatment, so as to eliminate the residual stress in the copper foil; the electrochemical grain boundary pinning treatment adopts a silicon tungstate or phosphomolybdate electrolyte, and introduces tungsten or molybdenum elements at the grain boundary of the copper foil to form a pinning layer; in the surface treatment, the roughening treatment adopts pulse current and adds grain nano-refining additives, the solidification treatment is performed in a solidification liquid containing a rare earth salt, and the silane coupling agent treatment adopts a complex treatment liquid of KH-560 and a long-chain alkyl silane coupling agent. The obtained HVLP copper foil has a roughness Rz of the rough surface of less than or equal to 0.8 microns, high initial peel strength, a peel strength retention rate of more than 80% after hygrothermal aging, and good long-term service stability.

The application discloses a kind of co-high-entropy carbide cermet materials and preparation method and application thereof, belong to the field of cermet material.The co-high-entropy carbide cermet material provided by the application is with (WVMoTaTi) C ceramic as matrix, directly adding its corresponding metal elements (W element, V element, Mo element, Ta element, Ti element) as binder phase by discharge plasma coupling high-frequency induction sintering.The preparation method is to mix all raw materials in proportion first, then ball mill, dry to obtain mixed powder, and discharge plasma coupling high-frequency induction sintering is used.The application provides a kind of co-high-entropy carbide cermet material with high-entropy carbide solid solution and high-entropy alloy coexisting, which has excellent comprehensive mechanical properties, high precision and high-speed cutting ability, and shows irreplaceable importance in tool material, precision machining and other fields.

The application provides a kind of straw returning to field with self-hardening broken blade steel and its preparation method, and belongs to the field of steel preparation.The broken blade steel chemical composition includes C, Si, Mn, Cr, Ni, Mo, Nb, Ti, V, B and Fe; wherein, the content of C is 0.30%~0.55%, the content of Si is 0.15%~0.25%, the content of Mn is 0.45%~0.75%, the content of Cr is 0.85%~2.0%, the content of Ni is 3.0%~4.5%, the content of Mo is 0.4%~1.2%, the content of Nb is 0.01%~0.060%, the content of Ti is 0.015%~0.03%, the content of V is 0.3%~0.9%, and the content of B is 0.002%~0.005% by mass fraction.By limiting the addition of C, Si and Mn to improve the tensile strength of steel, adding Ti and Nb elements for fine-grain strengthening and second phase particle precipitation strengthening, adding B and Cr elements to improve the hardenability of steel, adding Ni to improve the toughness of steel, adding Mo element to improve the ability of anti-tempering brittleness, and adding V element to ensure hardenability at local high temperature, the metallographic structure of the steel is obtained in the form of lath martensite, thereby improving the performance of the broken blade.

The invention provides a membrane wall. The membrane wall comprises a plurality of metal base tubes, a plurality of fins, a corrosion-resistant layer and an alloy layer, the metal base tubes are connected through the fins; the corrosion-resistant layer is formed on the outer surface of the metal base pipe and forms metallurgical bonding with the outer surface; the alloy layer is formed on the surface of the corrosion-resistant layer and is metallurgically bonded with the surface of the corrosion-resistant layer; in the alloy layer, the mass percent of iron is smaller than or equal to 10%, the mass percent of chromium is larger than or equal to 12%, the mass percent of molybdenum is larger than or equal to 5%, the mass percent of tungsten is larger than or equal to 4%, the total mass percent of nickel and cobalt is larger than or equal to 50%, and the Vickers hardness of the alloy layer ranges from 350 Hv to 650 Hv. The invention further provides a manufacturing method of the membrane wall and a circulating fluidized bed boiler. The membrane wall formed by the method can effectively resist corrosion and abrasion.

The invention discloses an AlCrSiWN / Mo nano-composite coating with high hardness and high wear resistance and a preparation process of the AlCrSiWN / Mo nano-composite coating, and belongs to the technical field of coatings. The nano-composite coating is formed by doping Mo element in an AlCrSiWN high-hardness coating by adopting an arc ion plating technology, and the thickness of the nano-composite coating is 3-4 microns. The preparation process of the coating comprises the steps that an AlCrN transition layer of a columnar crystal structure is prepared firstly, then an AlCrSiW target and a CrMo target are started at the same time, the AlCrSiWN / Mo nano-composite coating with the high hardness and the self-lubricating performance is obtained by regulating and controlling the evaporation current of the CrMo target to be 122-150 A and utilizing the synergistic effect of the self-lubricating characteristic of the Mo element and the high hardness characteristic of the AlCrSiWN coating, and the self-lubricating performance of the AlCrSiWN / Mo nano-composite coating is improved while the high hardness of the coating is kept. The toughness and the self-lubricating performance of the coating are improved, and the friction coefficient is reduced while crack propagation is inhibited.

According to the yttrium-containing heat-resistant steel, by adding the rare earth yttrium element, the grain boundary binding force can be improved, the grain boundary strength and plasticity can be improved, the microstructure of steel can be remarkably refined, growth of thermal fatigue cracks can be inhibited, and therefore the steel can obtain better thermal ductility. And in addition, a proper amount of Mn and N elements are added to replace the Ni element, a proper amount of Zr / Nb / V elements are added to replace part of Mo element, the cost is jointly reduced, meanwhile, composite precipitation of (Zr / Nb / V / Mo) C / N is achieved, grains are further refined, the strength is improved, and therefore the steel has more excellent high-temperature performance.

The invention relates to a class of electrochemical energy storage materials and a preparation method and application thereof. A porous metal oxide-based electrochemical energy storage material at least comprises a host metal oxide with a hierarchical pore structure; wherein, the host metal oxide is a single crystal, quasicrystal, or twin crystal structure with ordered atomic lattice arrangement, the crystal is rich in oxygen atom vacancy defects, the structural general formula is MxOy-z, wherein M is selected from one or more combinations of niobium element, molybdenum element, titanium element, vanadium element, manganese element, iron element, cobalt element, nickel element, copper element, zinc element, tungsten element, tantalum element, and zirconium element; and 1≤x≤2, 1≤y≤5, and 0.1≤z≤0.9, preferably Nb2O5-z.