143 results about "Ni element" patented technology

The invention discloses an ultra-wideband carbon / boron doped high-entropy alloy wave-absorbing material which is prepared by adjusting Fe and Ni elements, adding Si and Al elements and doping a small amount of C or B. The specific component of the wave-absorbing material is (FeaCobSicAldNie) 100-xMx. In addition, the invention also discloses a preparation method of the wave-absorbing material, and the preparation method comprises the following steps: 1, high-entropy alloy smelting; 2, preparing high-entropy alloy spherical powder; 3, carrying out flaky treatment; and 4, stress relief annealing. On the basis of FeCoNi medium-entropy alloy, the content of the Fe element with low cost is increased, the content of the Ni element with high cost is reduced, the Si element and the Al element are added at the same time, then a small amount of non-metal C and B elements are doped to serve as interstitial atoms, lattice distortion is increased, the wave-absorbing performance and corrosion resistance are improved, and the ultra-wideband carbon / boron doped high-entropy alloy wave-absorbing material is obtained.

In a method for producing, and / or installing into a system, a component with one or more weld seams containing a nickel-chromium-aluminum alloy, with (in wt. %) >18 to 33% chromium, 1.8-4.0% aluminum, 0.01-7.0% iron, 0.001-0.50% silicon, 0.001-2.0% manganese, 0.00-0.60% titanium, respectively 0.0-0.05% magnesium and / or calcium, 0.005-0.12% carbon, 0.0005-0.050% nitrogen, 0.0001-0.020% oxygen, 0.001-0.030% phosphorus, max. 0.010% sulfur, max. 2.0% molybdenum, max. 2.0% tungsten, remainder ≥50% nickel and impurities, the component containing semi-finished products of wrought alloy, after welding, only the weld seams and surrounding heat-affected zones undergo annealing between greater than 980 and 1250° C. for 0.05 minutes-24 hours, then cooling in inert protective atmosphere, moving protective gas or air, where: Cr+Al≥28 and Fp≤39.9 with Fp=Cr+0.272*Fe+2.36*Al+2.22*Si+2.48*Ti+0.374*Mo+0.538*W−11.8*C, Cr, Fe, Al, Si, Ti, Mo, W and C being element wt. % concentrations.

The invention belongs to the technical field of electronic packaging and welding materials, and relates to lead-free solder powder for reflow soldering and a preparation method of the lead-free solder powder. The lead-free solder powder is based on a Sn-Ag-Cu alloy system, and melt purification, beta-Sn grain refinement and interface IMC stabilization are achieved by compositely adding trace Ce and Ni elements. The Sn-Cu-Ce alloy comprises the following components in percentage by mass: 2.9%-3.1% of Ag, 0.45%-0.55% of Cu, 0.01%-0.10% of Ce, 0.01%-0.05% of Ni and the balance of Sn and impurities. During preparation, a Ce-Ni intermediate alloy is adopted to introduce microalloy elements, and the spherical solder powder is obtained through vacuum melting, inert gas atomization and surface treatment. The obtained solder powder is low in oxygen content, good in wettability, slow in interface IMC growth after backflow, high in welding spot strength and excellent in thermal cycle reliability, and is suitable for the field of high-reliability electronic packaging.

The invention provides an anodic oxidation die-casting aluminum alloy and a preparation method thereof. The anodic oxidation die-casting aluminum alloy comprises the following elements of, by mass, 0.01%-1% of Mg element, 0.01%-2% of Zn element, 0.01%-2% of Si element, 0.01%-1% of Ni element, 0.2%-0.5% of Fe element, 1.6%-2.4% of Mn element, 0.1%-0.2% of Cu element, 0.02%-0.2% of Ti element, the total content of inevitable impurities smaller than or equal to 0.2%, and the balance Al element. Wherein the sum of the mass content of the Mg element and the mass content of the Zn element is 1-3%, the sum of the mass content of the Si element and the mass content of the Ni element is 0.1-2.5%, and the sum of the Fe element, the Si element and the Ni element is 0.1-3%. The aluminum alloy can be better used for producing thin-wall piece products with the thickness of 0.8-1.8 mm.

The invention discloses a method for preparing a magnesium-based composite material based on semi-solid injection molding and a product and application of the magnesium-based composite material, and belongs to the technical field of magnesium-based composite material preparation.The method comprises the following steps that a semi-solid injection molding method is adopted, a mixture of magnesium alloy matrix particles (millimeter-level) and high-entropy alloy powder is sequentially heated and stirred, and the magnesium alloy matrix particles (millimeter-level) and the high-entropy alloy powder are obtained; performing injection molding and cooling to obtain a sample; and the sample is annealed, and the magnesium-based composite material is prepared. Wherein the magnesium alloy matrix particles comprise the following components in percentage by mass: 1-9% of aluminum, 1-7% of zinc and the balance of magnesium and inevitable impurities (impurity elements are less than or equal to 0.1%); the high-entropy alloy powder is particles containing Al, Co, Cr, Fe and Ni elements, and the particle size is 0.5-50 microns. Magnesium alloy matrix particles and AlCoCrFeNi particles are mixed, and then a semi-solid injection molding technology is combined, so that the sedimentation problem of a high-density reinforced phase can be eliminated, the reinforced phase is uniformly dispersed in the material, and the comprehensive mechanical property of the composite material is further improved.

The invention provides welding wire steel for welding ultralow-temperature high manganese steel, a welding wire, a preparation method of the welding wire and a welding method. The welding wire steel for welding the ultralow-temperature high manganese steel comprises the following components in percentage by mass: 0.05 to 0.1 percent of C; 0.5 to 0.6 percent of Si; 24% to 25% of Mn; p is less than or equal to 0.01%; s is less than or equal to 0.01%; 0.05% to 0.1% of Al; 0.12 to 0.2 percent of Ni; 0.02% to 0.06% of N; 0.08% to 0.15% of Ti; v, 0.08% to 0.15%; 0.08% to 0.15% of Nb; 0.05% to 0.1% of Mo; and the balance of Fe and inevitable impurities. The welding wire composition design is optimized, only a small amount of Ni element is added, W and other high-melting-point elements are not added, and a small amount of C, N, Ti, V, Nb and other alloy elements are transited to a welding seam through the welding wire, so that nitride, carbide and other pinning grain boundaries are formed in the welding seam at the high temperature, austenite grain growth is effectively prevented, the austenite grain size is reduced, and the low-temperature impact toughness of the welding seam is improved; in addition, a small amount of Si element is transited to the welding seam through the welding wire, molten pool fluidity is improved, slag floating is promoted, and slag inclusion of the welding seam is avoided.

The invention discloses hard alloy welding powder for valve sealing surface surfacing and a preparation method of the hard alloy welding powder. The welding powder comprises 1.20%-1.40% of C element, 2.70%-3.5% of Si element, 3.00%-4.50% of Mn element, 24.00%-26.00% of Cr element, 2.00%-2.20% of Mo element, 3.50%-4.50% of Ni element, smaller than or equal to 0.20% of Co element, smaller than or equal to 0.02% of B element, smaller than or equal to 0.10% of N element and the balance Fe element. The preparation method comprises the following steps: weighing raw materials, mixing and smelting the raw materials to obtain alloy liquid; and the alloy liquid is subjected to gas atomization to prepare powder, and the hard alloy welding powder is obtained after screening. The Co element content is strictly limited, and meanwhile the hardness and other performance can meet the design requirement; the preparation method is simple and reliable in process.

The invention relates to the technical field of high-temperature alloy connection, and provides cobalt-based high-temperature alloy brazing filler metal and a preparation method and a welding method thereof, and the brazing filler metal comprises the following chemical components in percentage by mass: 7-13% of Ni, 10-20% of Cr, 0.01-3% of Ta, 0.01-0.3% of Ti, 8-14% of W, 1-3% of B, 0.01-0.4% of Zr, 0.1-0.5% of C and the balance of Co. According to the cobalt-based high-temperature alloy brazing filler metal, the Ni element is added to stabilize the austenite structure, and the plasticity of a weld joint is improved; in addition, by reducing the content of the Cr element and increasing the content of the W element, the proportion of the Cr element and the W element is changed, so that the obdurability of the weld joint is improved, the strength of the weld joint can be further improved by introducing the Ta element, the Ta element and the C element can form a TaC-phase carbide, in addition, the B element and the C element are adopted as melting reduction elements, and therefore the welding quality of the weld joint is improved. The melting point of the brazing filler metal can be reduced; the wettability of the brazing filler metal is improved.

The application discloses a yield strength 600MPa high-strength austenitic stainless steel and a preparation method thereof, relates to the technical field of stainless steel preparation, and comprises C<=0.10%, Si<=1.00%, Mn 8.50~10.50%, Cr 13.50~15.50%, Ni<=2.00%, Cu<=0.50%, and N<=0.20%. The yield strength 600MPa high-strength austenitic stainless steel and the preparation method thereof take Mn and N elements as austenitizing and strengthening elements, replace the precious Ni element, control the Ni content to be below 2.00%, greatly reduce the raw material production cost, and realize the accurate control of austenitic structure stability through the dual-dimension quantitative regulation of temperature and an austenitic stability criterion Delta. d30 The yield strength 600MPa high-strength austenitic stainless steel and the preparation method thereof can realize the accurate control of the austenitic structure stability through the dual-dimension quantitative regulation of temperature and an austenitic stability criterion Delta. The comprehensive mechanical properties of yield strength >=600MPa, tensile strength >=1200MPa and elongation after fracture >=30% can be stably achieved.

The invention belongs to the field of metal oxide semiconductor-gas sensing, and particularly relates to a Ni < x > Fe < 2-x > O semiconductor gas-sensitive material with asymmetric defects, a preparation method and application, the sensing material is characterized in that Ni is doped in a Fe2O3 framework to form a Ni < x > Fe < 2-x > O bimetallic oxide rich in Ni-Ov-Fe asymmetric defects, Ni is used as a main active site for adsorbing and catalyzing NO2, and the Ni is used as a main active site for adsorbing and catalyzing NO2. And with the mutual reaction with active oxygen on asymmetric defects on the surface of the material, the sensing performance on NO2 is improved. The Ni < x > Fe < 2-x > O sensing material is prepared through a hydrothermal-calcination method, the interaction between Ni element and other atoms in a Fe2O3 frame is remarkable, and the electron transmission capacity is improved. The material is clear in labor division in the NO2 sensing process, NO2 and O2 have respective adsorption activation sites, then reaction is carried out, excellent NO2 sensing response performance and extremely low detection limit (200 ppb) are shown, and a good foundation is laid for development of novel metal oxide semiconductors.

This invention relates to an Fe-Ni based alloy with enhanced soft magnetic properties utilizing a medium-range ordered structure and its preparation method. The chemical formula of the alloy is: Fe bal Ni a Cr y Si b B c M d Cu e X f Its microstructure is as follows: the alloy matrix is ​​mainly amorphous, with dispersed atomic-scale medium-range ordered (MRO) clusters comprising 15%–40% by volume. The size of these clusters is controlled between 1 nm and 5 nm, and no long-range crystalline phases larger than 10 nm are formed. By introducing Ni element to couple magnetic moments with Fe to reduce the saturation magnetostriction coefficient, and by using a low-temperature relaxation annealing process to control the pre-precipitation behavior of Cu element, a high-density MRO-reinforced framework is established in the amorphous matrix. This material possesses high saturation magnetic induction, low coercivity, and excellent high-frequency permeability, which can improve the problems of large magnetostriction coefficients and high high-frequency noise in existing high-Bs iron-based nanocrystalline alloys. It is particularly suitable for high-frequency high-power transformers and wireless charging magnetic shielding modules.

The invention discloses 5.5 Ni steel with excellent ultralow-temperature impact toughness as well as a preparation method and application of the 5.5 Ni steel. The 5.5 Ni steel is prepared from chemical components in percentage by mass as follows: 0.04%-0.1% of C, 0.04%-0.15% of Si, 0.5%-1.5% of Mn, 5.0%-6.0% of Ni, 0.2%-0.3% of Mo and the balance of Fe and inevitable impurities. The preparation method comprises the following steps: smelting; carrying out thermal mechanical treatment; and carrying out heat treatment by a quenching-two-phase region quenching-tempering process. According to the 5.5 Ni steel provided by the invention, only a certain mass fraction of Mo element is added, so that the problem of insufficient hardenability and strength caused by reduction of Ni element is solved, and the problem of low low-temperature toughness when the 5.5 Ni steel replaces 9Ni steel is solved through a QLT heat treatment process of thermal mechanical treatment and a quenching-two-phase region quenching-tempering process; the impact absorbing energy of the 5.5 Ni steel at the temperature of-196 DEG C reaches 250 J or above, the yield strength at the room temperature is larger than 580 MPa, and the requirements for strength and low-temperature toughness of the steel for the LNG storage tank are met.

The invention discloses a preparation method of mining wear-resistant steel US300N hot-rolled round steel. The preparation method comprises a steelmaking process and a steel rolling process. The hot-rolled round steel comprises the following chemical components in percentage: 0.61 to 0.63 percent of C, 0.70 to 0.75 percent of Mn, 1.75 to 1.85 percent of Si, 0.82 to 0.85 percent of Cr, less than or equal to 0.018 percent of P, less than or equal to 0.010 percent of S, 0.07 to 0.08 percent of Ni, 0.010 to 0.020 percent of Al and the balance of iron and inevitable trace elements. According to the invention, the contents of C, Si and Cr elements are reasonably controlled, the Ni element is added to refine pearlite interlamellar spacing, the size of inclusions and the cleanliness of steel are controlled through a steelmaking process, and the structure transformation and grain size of a hot rolling state are controlled through a steel rolling process, so that the wear-resistant hot-rolled round steel with matched hardness and toughness is obtained.

This invention belongs to the field of electronic packaging and soldering materials technology, and relates to a lead-free solder powder for reflow soldering and its preparation method. This lead-free solder powder is based on a Sn-Ag-Cu alloy system, and achieves melt purification, β-Sn grain refinement, and interface IMC stabilization by adding trace amounts of Ce and Ni elements. Its composition, by mass percentage, is: Ag 2.9%–3.1%, Cu 0.45%–0.55%, Ce 0.01%–0.10%, Ni 0.01%–0.05%, with the balance being Sn and impurities. During preparation, a Ce-Ni master alloy is used to introduce microalloying elements, followed by vacuum melting, inert gas atomization, and surface treatment to obtain spherical solder powder. The resulting solder powder has low oxygen content, good wettability, slow interface IMC growth after reflow, high solder joint strength, and excellent thermal cycling reliability, making it suitable for high-reliability electronic packaging applications.

Provided is a ceramic composition enabling a lower sintering temperature (or firing temperature), an electronic component, and a method for manufacturing the ceramic composition. A ceramic composition of the present disclosure comprises an oxide containing Mn and Ni elements, and contains all of Li, Na, and K elements.

The invention discloses a hot rolled steel strip for a fatigue-resistant cutting tool and a preparation method of the hot rolled steel strip. The hot rolled steel strip comprises the following components in percentage by mass: 0.27%-0.33% of C, 0.80%-1.10% of Mn, 0.25%-0.40% of Si, 0-0.010% of S, 0-0.022% of P, 3.70%-4.10% of Cr, 0.60%-0.80% of Ni, 1.10%-1.40% of Mo, 0.25%-0.45% of V, 0.030%-0.080% of Als, 0-0.20% of Cu, 0-0.5% of impurities and the balance of Fe. According to the hot rolled steel strip, the medium-carbon high-alloy components are adopted, alloy elements such as Cr, Ni, Mo and V are added, particularly the content of Cr is increased, and meanwhile, the Mo and Ni elements with reasonable content are added, so that the hot rolled steel strip has high strength, good plasticity and toughness and excellent fatigue resistance.

The application provides a tool steel and a preparation method thereof. The tool steel comprises the following chemical components in percentage by mass: C: 0.50-0.59%, Si: 0.80-0.95%, Mn: 0.35-0.55%, Cr: 8.00-9.00%, W: 0.80-1.20%, Mo: 3.00-3.40%, V: 0.30-0.50%, Nb: 0.15-0.30%, Co: 0.18-0.38%, Ni: 0.15-0.35%, and the balance of Fe and impurities. The tool steel has excellent high strength, high toughness and red hardness through the design of alloy components, the increase of the content of Mo, the addition of Co and Ni elements, the design principle of multiple element combination, and the comprehensive consideration of the precipitation and growth mechanism of different element carbides in the solidification process.

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 present application relates to the technical field of electrochemical hydrogen evolution reaction, in particular to a HER electrochemical cathode material based on Ni-Mo-Al composite coating. The conventional coating preparation technology has high cost, low powder utilization rate and poor bonding force between the coating and the current collector substrate. In view of the above problems, the present application provides a HER electrochemical cathode material based on Ni-Mo-Al composite coating, which is a metal composite coating formed by loading Ni, Mo and Al three kinds of metal powder on the surface of porous nickel current collector, the metal composite coating and the surface of porous nickel current collector form metallurgical bonding, and the metal composite coating is a coating obtained by coating Mo powder in the Ni-Al binary eutectic phase formed by Ni element and Al element. In the electrode material of the present application, no noble metal is used, the cost is low, the bonding force between the coating and the current collector substrate forms metallurgical bonding, the bonding force is strong, no toxic Cl2 gas is produced, and it is more environmentally friendly.

According to the rust-proof saw blade and the saw blade rust-proof treatment method provided by the invention, the matrix structure of the frame saw blade is uniform, the internal stress is low and the chemical stability is high through adding Cu and Ni elements and heat treatment optimization; a composite anti-rust system which is compact in structure and high in binding force is constructed on the surface of the frame saw blade, and a frame saw blade base body treated through the method has excellent mechanical performance and also has long-acting anti-rust capacity.

The invention belongs to the technical field of nuclear energy materials and surface engineering, and particularly relates to application of an MAX phase coating in a lead bismuth environment. The MAX phase coating is deposited on the surface of the structural material, so that the corrosion resistance and wear resistance of the steam generator can be remarkably improved. The result shows that under the conditions that the temperature is 450 DEG C, the normal load is 50N, the displacement amplitude is 75 microns, the vibration frequency is 25Hz and the cycle index is 106, a stable aluminum oxide oxidation layer and a compacted abrasive dust layer can be formed, so that the Ni element is effectively prevented from being dissolved, and the corrosion rate of a structural material is reduced; meanwhile, the abrasion depth of the structural material is reduced by 70% compared with that before protection, the structure is stable, the binding force is high, and the structural material is still kept complete and has no obvious peeling or failure phenomenon even in a long-cycle test.

The invention discloses a copper-aluminum-nickel alloy grounding material and a preparation method thereof, and relates to the field of grounding materials.The copper-aluminum-nickel alloy grounding material is characterized by comprising, by mass, 5-9% of Ni, 6-9% of Al and the balance Cu; in the smelting process, firstly, electrolytic copper is molten, then cupronickel with the designed proportion is added, finally, pure aluminum is added, and after all the raw materials are molten and subjected to heat preservation for 1-3 min, the raw materials are poured into a mold to be cooled and demolded to obtain a cast ingot; the invention provides a novel copper alloy grounding material, and discusses the rule of the influence of the content of the Ni element on the performance of the novel copper alloy grounding material. The Cu-Al-Ni alloy with different Ni contents is subjected to microstructure observation, the influence of different Ni contents on the mechanical property is discussed, and the influence of the Ni contents on the corrosion property of the Cu-Al-Ni alloy is explored through an electrochemical polarization curve.

This application belongs to the field of high-temperature alloy technology, and particularly relates to a low-density, high-strength, low-expansion high-temperature alloy and its preparation method. Existing Ni-Mo-Cr low-expansion high-temperature alloys rely solely on Mo solid solution strengthening and Cr oxidation resistance, without introducing Ti and Al to form γ' phase precipitation strengthening, and without establishing a stoichiometric balance between the Ni matrix and Ti and Al elements. This results in high density and low strength in existing alloys, failing to achieve a balance between low density and high strength. The embodiments of this application introduce Ti and Al to form γ' phase precipitation strengthening phases, replacing some of the heavier Ni element with lighter Ti and Al elements, and establishing a stoichiometric balance of [1.6Ni-3(2Ti+3.6Al)] / Mo = 3.0 to 4.2. This achieves for the first time the synergistic effect of solid solution strengthening and precipitation strengthening, as well as the simultaneous reduction of density and increase in strength, thus solving the technical problem of how to achieve low density, low expansion, and high strength in low-expansion high-temperature alloys.

The invention discloses a 9Ni steel plate with low Ni segregation and excellent low-temperature toughness and a preparation method and application of the 9Ni steel plate with low Ni segregation and excellent low-temperature toughness, and the preparation method of the 9Ni steel plate with low Ni segregation and excellent low-temperature toughness adopts the following smelting route: continuous casting, hot rolling, induction heating quenching, two-phase region quenching and tempering, wherein a casting blank obtained through continuous casting is subjected to soft reduction treatment so that the segregation index of the Ni element in the core of the casting blank can be smaller than or equal to 1.10, then hot rolling treatment is carried out so that the average size of austenite grains of the steel plate can be within the range of 9-12 microns, and then quenching treatment and tempering treatment are carried out twice. According to the preparation method, the structure uniformity and Ni segregation in the heat treatment process of the 9Ni steel rolling plate can be obviously reduced, the surface oxidation in the heating process of the 9Ni steel plate can be greatly reduced, the surface quality of the steel plate is ensured, and a powerful guarantee can be provided for obvious improvement of the transverse and longitudinal impact toughness at the temperature of 196 DEG C below zero and uniformity control of the steel plate.

The invention discloses a TiFe-based hydrogen storage alloy and a preparation method thereof, and belongs to the field of metal hydrogen storage materials. The general chemical formula of the TiFe-based hydrogen storage alloy is TiaNdbZrcFedNieMnf, and the atomic percent of each element is as follows: 46 to 53 at% of Ti element, 0.1 to 1.5 at% of Nd element, 1 to 6.5 at% of Zr element, 27 to 40 at% of Fe element, 2 to 10 at% of Ni element and 4.5 to 12 at% of Mn element; wherein Ti, Nd and Zr are first metal elements, Fe, Ni and Mn are second metal elements, and the ratio of the total atomic percent of the first metal elements to the total atomic percent of the second metal elements is 1.05-1.20. The TiFe-based hydrogen storage alloy can be activated at room temperature, has proper hydrogen absorption and desorption platform pressure, and keeps high hydrogen storage capacity and high hydrogen absorption and desorption rate at the same time.

The present invention discloses a high-toughness and easily soluble magnesium alloy and a preparation method thereof. The high-toughness and easily soluble magnesium alloy contains the following components by mass percentage: 1% to 6% of Zn element, 1% to 4% of Ni element, 0.2% to 4% of element A, 0.2% to 1% of element B, and the balance is Mg element; the element A is at least one of Gd element and Y element, and the element B is at least one of Ga element and In element; the high-toughness and easily soluble magnesium alloy contains 3 kinds of intragranular precipitation phases with regular shapes, and the intragranular precipitation phases are basal plane-oriented MgZn phase, prism plane-oriented MgZn phase, and non-oriented MgNi phase. The high-toughness and easily soluble magnesium alloy of the present invention simultaneously has high strength, high elongation rate, and high dissolution rate. The tensile strength at room temperature is ≥240 MPa, the yield strength is ≥160 MPa, the elongation rate is ≥8%, and the dissolution rate in water at room temperature is ≥30 mg·cm<supgt;‑2< / supgt;·h<supgt;‑1< / supgt>.

The application discloses an anti-abrasion cobalt-based cladding powder, an ultrafine lamellar eutectic cobalt-based coating and a preparation method, and belongs to the technical field of anti-abrasion and anticorrosion alloy coating. The cladding powder comprises 15.0-20.0% of Ni, 14.0-15.0% of Cr, 22.0-25.0% of Mo, 2.7-2.9% of Si and 0.07% or less of C, and the rest is Co, in percentage by mass. The application utilizes the difference in mixing enthalpy of a specific content of Ni element and other elements in the cobalt-based alloy system, changes the non-equilibrium solidification path in laser cladding, suppresses the excessive precipitation and growth of Laves phase, and forms a Laves phase / (gamma-Co / Ni) lamellar ultrafine eutectic structure with excellent strength and toughness. Compared with the prior art, the application can significantly reduce the crack sensitivity of the coating without sacrificing the comprehensive performance of the coating in abrasion resistance and corrosion resistance.

This invention provides a high-strength, heat-resistant Al-Zn-Mg-Cu-Zr-Ni aluminum alloy, comprising, by mass percentage: Zn 7.0–8.0%, Mg 3.5–4.0%, Cu 1.0–1.5%, Zr 0.08–0.15%, Ni 0.08–0.15%, with Zn / Mg < 2.5, Cu / Mg > 0.3, Zr + Ni ≤ 0.2, and the balance being Al. This application also provides a method for preparing the aluminum alloy. By controlling the elemental ratio of the high-alloyed Al-Zn-Mg-Cu-Zr-Ni alloy, this invention transforms the strengthening phase, which is prone to coarsening at high temperatures, into a heat-resistant strengthening phase. Simultaneously, it uses low-cost Zr and Ni elements to replace elements such as Sc and Er, resulting in a high-strength, heat-resistant, and low-cost aluminum alloy.

The application provides a kind of low carbon high phosphorus weathering cold upsetting steel satisfying cold upsetting large deformation and preparation method, belongs to steel preparation field.The chemical composition of the cold upsetting steel includes:C:0.15%~0.25%, Si:0.20%~0.30%, Mn:0.30%~0.40%, Cu:0.20%~0.60%, P:0.08%~0.14%, S≤0.01%, Ni:0.10%~0.15%, Cr:0.20%~0.50%, Al T :0.025%~0.06%; wherein, C and P satisfy the following relationship: [P]*[C]≤0.035.Rationally design the chemical composition of cold upsetting steel, inhibit pitting by proper high phosphorus content and Cu, Ni element cooperation, form passivation film, satisfy the corrosion performance of the atmospheric environment characteristics of strong radiation, high SO2 concentration.At the same time, control C and P satisfy the relationship, avoid the problem of phosphorus segregation, grain boundary embrittlement, so as to satisfy the requirement of cold upsetting one-time forming limit quantity>80%.

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.