55 results about "Maraging steel" patented technology

A tool includes a cemented carbide part and a maraging steel part, wherein the two parts are joined by brazing. The cemented carbide part has a hard phase embedded in a metallic binder phase matrix. The maraging steel part has a hardness of between 350 and 600 HV1 with a standard deviation between 0 and 20 HV1. A method of making such tool is also provided.

The application discloses a kind of martensitic age steel of additive manufacturing and preparation method thereof, the martensitic age steel, according to mass percentage, its composition is as follows: Ni 16~22%, Co0-5%, Mo 2~6%, Ti 0.2~2.5%, Al 0~1.5%, Re 0~0.3%, wherein Re is selected from at least one of Y or La, the balance is Fe and inevitable impurities.In the application, by reducing Co element, adjusting the ratio of Ni, Ti and Mo in the alloy, while adding a small amount of rare earth (Y and La) element, the alloy has higher M s Under the premise, the raw material cost of alloy powder and the preparation cost of alloy are greatly reduced, and the fine equiaxed grains and high-density nano precipitates formed after aging are formed by combining with the process parameter control of additive manufacturing, so that the mechanical properties of the martensitic age steel are greatly better than those of the traditional casting process.

The invention discloses an ultrahigh-strength maraging steel wire as well as a preparation method and application thereof, and belongs to the field of steel product manufacturing. The steel wire alloy comprises the following components in percentage by weight: 0.02%-0.05% of C, 0.10%-0.35% of Si, 0.20%-0.60% of Mn, 0.60%-2.50% of Cr, 18.5%-22.0% of Ni, 8.0%-13.0% of Co, 1.2%-2.0% of Ti, 3.0%-5.5% of Mo, 0.10%-0.50% of Al, less than or equal to 1.50% of Cu, less than or equal to 1.50% of Nb, less than or equal to 0.05% of V, less than or equal to 0.04% of N, less than or equal to 0.02% of La + Ce and the balance of Fe and inevitable impurity elements. And the equivalence ratio Nieq / Creq of nickel to chromium is greater than or equal to 1.80. The steel wire provided by the invention has ultrahigh strength, excellent toughness and plasticity, wear resistance, heat resistance, drawing performance and bending and twisting performance.

The preparation method comprises the steps that maraging steel raw materials are selected, and high-oxygen pure iron with the C / O mass ratio being 0.75-0.85 is adopted as the iron raw materials; smelting the maraging steel raw material by using a vacuum induction furnace, and pouring to obtain an electrode bar; and remelting the electrode bar by using vacuum arc to obtain the maraging steel cast ingot. The high-strength and high-toughness alloy material comprises the following components in percentage by mass: 17.0%-19.0% of Ni, 14.0%-16.5% of Co, 5.5%-7.5% of Mo, 1.0%-1.5% of Ti, 0.03%-0.08% of Al, less than 0.003% of C, less than 0.001% of N, less than 0.001% of O, less than 0.002% of P, less than 0.001% of S, less than 0.01% of Si, less than 0.01% of Mn, 0.0001%-0.01% of RE, 0.0001%-0.003% of B and the balance of Fe. The requirements of ultra-low carbon, ultra-low oxygen, ultra-low nitrogen and high purity of the ultra-pure maraging steel can be met, the smelting time of a vacuum induction furnace can be shortened, the efficiency is improved, and the ultra-pure maraging steel has extremely high application and popularization value.

The invention relates to the technical field of maraging steel heat treatment, in particular to a heat treatment method for refining a maraging steel structure. The method comprises the following steps: firstly, preserving heat of maraging steel at 830-880 DEG C for 1-2 hours, and performing water cooling to room temperature; secondly, keeping the temperature in liquid nitrogen for 3-5 hours, and then returning the temperature to room temperature; then the temperature is increased to 790-850 DEG C from the room temperature at the speed of 0.05-0.2 DEG C / s, and water cooling is directly conducted to the room temperature without heat preservation; and finally, keeping the temperature at 450-550 DEG C for 2-3 hours, and air-cooling to room temperature. According to the heat treatment method, the structure of the maraging steel can be fully refined in one step, the problems that in the traditional technology, the process is complex, and obdurability and structure refining are difficult to consider are solved, and a new method is provided for strengthening and toughening the maraging steel.

The invention provides maraging steel and a preparation method thereof, a structural member and electronic equipment. The maraging steel comprises, by weight, 11%-16% of Ni, 12%-17% of Co, 7%-10% of Mo, 0.4%-1.5% of Ti and the balance Fe and impurity elements, the tensile strength of the maraging steel is larger than or equal to 2800MPa, and the ductility of the maraging steel is larger than or equal to 3.5%. The plasticity of the maraging steel is improved while the strength of the maraging steel is improved.

The invention relates to the technical field of metallurgical engineering, in particular to a recycling method of high-cobalt-molybdenum metallurgical iron waste and martensite ultrahigh-strength steel. The low-carbon low-phosphorus ultra-pure Co-Fe alloy with different Co contents is produced through the recycling method of the high-cobalt molybdenum metallurgical iron waste, the Co-Fe alloy can be used for producing high-cobalt high-added-value martensite ultra-high-strength steel such as NiMark250, NiMark300 and 18Ni which are higher in value, and the production cost of the high-added-value martensite ultra-high-strength steel is reduced while recycling of Co resources is achieved. According to the method, pyrometallurgy is combined with the purity requirement of the high-cobalt-nickel maraging steel, the high-cobalt metallurgical waste is recycled, waste resources are recycled, and the subsequent production cost of the high-cobalt maraging steel is also reduced; the problems that in the prior art, high-cobalt-molybdenum metallurgical iron waste is difficult to recycle, and the production cost of high-cobalt-molybdenum maraging steel is high are solved.

The invention relates to the technical field of metallurgical engineering, in particular to a production method of nickel-iron alloy for metallurgy. The method comprises the following steps that the high-nickel-titanium metallurgical waste is divided into a plurality of categories according to the nickel content and the titanium content; and the multiple types of waste materials are subjected to smelting and post-treatment correspondingly, and finished nickel-iron alloy products with different nickel contents are obtained. According to the method, high-valued recovery of nickel and titanium resources in the waste is achieved through fine classification, multi-stage refining control and vacuum purification of the waste, the produced high-purity nickel-iron alloy can be directly used for smelting high-end maraging steel, degradation use is effectively avoided, the raw material cost is remarkably reduced, and the resource utilization rate is increased.

Provided is a maraging steel powder with which it is possible to obtain a laminated molded article having excellent thermal fatigue life characteristics and little deformation after molding while minimizing Co content. A maraging steel powder for laminate molding, which contains, in mass%, 0.02% or less of C, 0.1%-0.3% of Si, 16%-20% of Ni, 0.1% or less of Co, 2.7%-3.5% of Mo, 1.5%-2.5% of Ti, 0.01% or less of Al, and the balance of Fe and unavoidable impurities, and a laminate molded article of maraging steel, which contains, in mass%, 0.02% or less of C, 0.1%-0.3% of Si, 16%-20% of Ni, 0.1% or less of Co, 2.7%-3.5% of Mo, 1.5%-2.5% of Ti, 0.01% or less of Al, and the balance of Fe and unavoidable impurities. The steel sheet comprises 0.02% or less of C, 0.1%-0.3% of Si, 16%-20% of Ni, 0.1% or less of Co, 2.7%-3.5% of Mo, 1.5%-2.5% of Ti, 0.01% or less of Al, and the balance Fe and unavoidable impurities.

The invention relates to an explosive welding preparation method of a high-strength steel / high-toughness steel layered composite material, and belongs to the technical field of metal layered composite materials. The maraging steel and the austenitic stainless steel which are subjected to solution treatment are subjected to explosive welding and aging treatment to obtain the composite material with matched strength and toughness. The maraging steel obtains a supersaturated low-carbon lath martensite structure through solution treatment, the hardness is low and the plasticity is good in the state, and a good bonding interface can be formed during explosive welding; aging treatment is integrally carried out after welding, so that nanoscale intermetallic compounds are separated out from martensite phases, the strength and toughness of a welded plate are remarkably improved, meanwhile, embrittlement of a welding heat affected zone is avoided, and overall toughness synergy of the composite material is achieved.

The present application relates to the field of steel heat treatment technology, and specifically discloses a heat treatment process for refining the grains of C250 maraging steel. The heat treatment process for refining the grains of C250 maraging steel provided in the present application comprises the following steps: first, the C250 maraging steel is kept at a temperature of 945-955°C for 1-1.5 hours and water-cooled to room temperature; then, the C250 maraging steel is kept at a temperature of 925-935°C for 1-1.5 hours and water-cooled to room temperature; then, the C250 maraging steel is kept at a temperature of 895-905°C for 1-1.5 hours and water-cooled to room temperature; finally, the C250 maraging steel is kept at a temperature of 815-825°C for 1-1.5 hours and air-cooled to room temperature. The heat treatment process for refining the grains of C250 maraging steel provided in the present application can fully refine and homogenize the grains of the C250 maraging steel, so that the grains of the C250 maraging steel reach 8-9 levels and have excellent mechanical properties.

The invention relates to a direct energy deposition additive manufacturing method for super-strong maraging steel, and belongs to the technical field of additive manufacturing. In the method, in order to obtain the excellent performance of the super-strong maraging steel, the super-strong maraging steel is subjected to heat treatment, formed super-strong maraging steel is obtained by optimizing 3D printing process parameters, and a formed sample is subjected to solution treatment, subzero treatment and aging treatment to obtain a super-strong maraging steel finished product. The influence of heat treatment on the structure and performance of the 3D printing super maraging steel is verified through phase analysis, microstructure observation, tensile test, impact test and contrastive analysis.

A kind of granular enhanced martensitic age steel cored filling wire for double-wire electric arc additive manufacturing and method, it relates to the field of additive manufacturing.Cored filling wire 1: manganese powder 0.5%-1%, cobalt powder 34%-36%, titanium powder 4%-5%, aluminum powder 1%-2%, molybdenum powder 47%-48%, the balance is iron powder;The outer skin is selected with low-carbon steel strip, and the carbon content is less than 0.03%;Cored filling wire 2: cobalt powder 18%-19%, ceramic particles 0.5%-2%, the balance is iron powder;The outer skin is made of iron-nickel alloy steel strip, and the mass ratio of Fe and Ni is 1:1;The filling rate is 20%-30%.The current control range is 160A-200A.The wire feeding speed is 150mm / min-160mm / min.Martensitic age steel component with good corrosion resistance and high strength can be obtained.

The invention discloses a powder injection molding method for improving the performance of maraging steel. The powder injection molding method comprises the following steps that maraging steel powder and a binder are kneaded to prepare feed; the prepared feed is subjected to crushing and granulation; carrying out injection molding on the crushed and granulated feed to obtain a green body; performing catalytic degreasing on the prepared green body; sequentially performing negative pressure degreasing, vacuum internal sintering and sintering on the sample subjected to catalytic degreasing to obtain a sintered part; the obtained sintered part is subjected to solid solution and quenching treatment, and a solid solution part of a full-martensite structure is obtained; the obtained solid solution part is subjected to pre-stretching treatment; and aging treatment is conducted on the pre-stretched sample, and the maraging steel is obtained. According to the present invention, the material is subjected to proper pre-stretching so as to introduce the high-density and uniform dislocation to improve the precipitation of the strengthening phase, such that the comprehensive performance of the material is improved, and the density of the dislocation introduced through the pre-stretching is high so as to appropriately reduce the addition of the noble metals such as Co, Mo and the like so as to easily reduce the cost;

This invention relates to the field of steel materials technology, and discloses a high-strength and high-toughness synergistically optimized martensitic aging steel and its preparation method. The martensitic aging steel comprises, by mass percentage: Co: 15.5~17.0%, Ni: 17.0~19.0%, Mo: 6.0~8.0%, Ti: 1.0~2.0%, Al: 0.5~1.0%, Mn: 0.1~0.5%, Zr: 0.01~0.05%, with the balance being Fe and unavoidable impurities. This invention can synergistically improve the strength and toughness of martensitic aging steel while reducing the difficulty of its preparation.

Embodiments of this application provide a maraging steel, a method for preparing a maraging steel, and an electronic device. The maraging steel includes the following alloy elements: Co, Mo, and Ti. By weight percentage, content of Co ranges from 12 wt% to 17 wt%, content of Mo ranges from 6 wt% to 8 wt%, and content of Ti ranges from 0.4 wt% to 1.5 wt%. The maraging steel further includes the following alloy elements: Ni, Al, Fe, and an impurity element. By weight percentage, content of Ni ranges from 15 wt% to 18 wt%, Al≤0.3 wt%, and the remainder is Fe and the impurity element. Embodiments of this application provide the maraging steel, the method for preparing a maraging steel, and the electronic device, so that the maraging steel can have both a high strength and high plasticity.

The invention relates to the field of welding materials, in particular to a stainless steel flux-cored wire for a high-temperature welding environment and a preparation method of the stainless steel flux-cored wire, which are used for solving the problem that the corrosion resistance of a common welding material is obviously influenced in the high-temperature welding environment. The stainless steel flux-cored wire comprises powder and a welding skin, the powder is obtained by mixing cobalt-grafted carbon alloy composite powder, molybdenum powder, ferrochrome powder, manganese powder and the like, the high-temperature stability of the flux-cored wire is improved through the cobalt-grafted carbon composite carbon material, and the high-temperature stability is jointly improved through addition of ferroboron powder, vanadium nitride powder and niobium-zirconium alloy powder; the welding skin is prepared by mixing 18Ni300 maraging steel powder and 0Cr18Ni9 austenite steel powder, so that the heat resistance and the corrosion resistance of the welding wire are improved; when the welding wire is used for welding, the welding wire is decomposed at a high temperature, released gas forms a protective layer, meanwhile, molten powder is mixed with a welding skin to form a high-quality welding seam, and it is ensured that the stable and reliable welding effect can also be obtained in a high-temperature environment.

The present invention belongs to the field of powder metallurgy materials and intelligent manufacturing technology, and relates to a metal material, in particular to an injection molding material, a maraging steel with ultra-high yield strength, and its application. An injection molding material, the mass percentage content of each chemical element of the material is: Ni 16.5~19wt%, Co 8.5~15wt%, Mo 5.6~8wt%, C≤0.03wt%, the balance is Fe, and unavoidable impurity elements. The material has excellent plasticity, and within this composition range, ultra-high strength steel with yield strength greater than 1800MPa, 1900MPa, and 2000MPa can be adjusted. The maraging steel described in the present invention can be used in aerospace, medical equipment, and especially in "3C" smart wearable devices, where both high strength and lightweight design are required.

To provide a metal powder material for additive manufacturing, capable of generating an additive manufactured object having properties of a steel material before aging treatment of maraging steel, such as high strength and toughness and excellent moldability at the time of manufacturing by a powder bed fusion method, having appropriate hardness, having high dimensional accuracy with residual stress being released, and having properties of maraging steel by an aging treatment carried out as necessary, and to provide a method for manufacturing an additive manufactured object.SOLUTION: According to the present invention, a metal powder material for additive manufacturing is provided which comprises C (carbon): more than 0.03 mass% and 0.4 mass% or less, Si (silicon): 0.1 mass% or more and 0.5 mass% or less, Mn (manganese): 0.2 mass% or less, Co (cobalt): 0.1 mass% or less, Ni (nickel): 17 mass% or more and 19 mass% or less, Mo (molybdenum): 1.5 mass% or more and 2.5 mass% or less, Ti (titanium): 0.5 mass% or more and 2.0 mass% or less, and Al (aluminum): 0.8 mass% or more and 1.1 mass% or less, with the balance consisting of Fe (iron) and inevitable impurities.SELECTED DRAWING: Figure 4

To provide maraging steel exhibiting high thermal conductivity while being substantially free of cobalt, and to provide powder composed of the maraging steel.SOLUTION: The maraging steel contains 9.0≤Ni≤12.0 mass%, 4.0≤Mo≤7.0 mass%, and 0.3≤Al+Ti≤1.4 mass%, with the remainder consisting of Fe and unavoidable impurities. The maraging steel preferably further contains at least one element selected from the group consisting of 0.05≤Nb≤0.3 mass%, 0.1≤V≤1.0 mass%, and 0.5≤W≤5.0 mass%. The powder is produced from the maraging steel.SELECTED DRAWING: Figure 2

The application discloses a functional gradient material and a preparation method and application thereof. The functional gradient material comprises, in sequence, a martensitic stainless steel base material layer, a transition layer, a nickel-based alloy layer, a composite gradient layer and a maraging steel layer. The transition layer is made of nickel-based alloy and austenitic stainless steel; the composite gradient layer is made of nickel-based alloy and maraging steel; and the microhardness of the martensitic stainless steel base material layer, the transition layer and the nickel-based alloy layer satisfies the following relationship: martensitic stainless steel base material layer < transition layer < nickel-based alloy layer; in the composite gradient layer, at least two sublayers with different compositions are included; and from the nickel-based alloy layer to the maraging steel layer, the mass percentage of nickel-based alloy in each layer decreases by 20-40 wt% in turn. The functional gradient material effectively solves the problem of interface hardness mutation during deposition of the maraging steel, and makes the material have excellent yield strength, elongation and wear resistance.

The present application relates to the field of aviation equipment maintenance, and particularly relates to an aircraft refueling control valve nut inner thread repairing device and a manufacturing method thereof, which comprises a base plate, further comprises a positioning gyroscope connected with a piston and a screw tap tenon, a cylindrical gyroscope handle with the same shape as the through hole of the piston is arranged on the positioning gyroscope, and a gyroscope disc with the same shape as the groove of the piston is arranged on the positioning gyroscope, the shape of the positioning gyroscope is gyroscope, and the specific steps are as follows: S1, size design; S2, positioning gyroscope model creation; S3, model data processing; S4, 18Ni300 die steel powder preparation; S5, positioning gyroscope rapid preparation; S6, aircraft refueling control valve nut inner thread repairing device assembly; the positioning gyroscope with the size of the piston accessory and the screw tap accessory is designed to be gap fit with both, 18Ni300 maraging steel material is selected, laser selection melting forming technology is adopted for rapid manufacturing, and finally the aircraft refueling control valve nut inner thread repairing device with variable range of clamping angle is obtained.

A method of making a tool having a joining a maraging steel joining partner and a cemented carbide joining partner by brazing and a tool made according to the method is provided. The method includes depositing a Ni coating onto the maraging steel joining partner prior to applying the filler material having at least 70 wt % Cu. The braze joint shows excellent shear strength.

The present invention relates to a rotary cutting tool insert comprising a carrier body made of maraging steel and at least one cutting element having at least one cutting edge, the rotary cutting tool insert further comprising a braze joint joining the carrier body and the at least one cutting element, the braze joint comprising Ti, and a Ti-containing bonding layer having a thickness of 0.03 to 5 μm adjacent to the cutting element.

The present invention relates to the technical field of steel materials, and discloses a tungsten-containing maraging ultra-high strength steel and a preparation method thereof. In terms of mass percentage, the tungsten-containing maraging ultra-high strength steel comprises: 14.5-16.0% of Co, 17.0-18.0% of Ni, 6.0-8.0% of Mo, 1.0-1.5% of Ti, 0.5-1.0% of W, and the balance is Fe and inevitable impurities. The control requirements for impurity elements are: C≤0.008%, Si≤0.1%, Mn≤0.1%, P≤0.005%, S≤0.005%, N≤0.0015%, O≤0.0015%. Based on the first-principles calculation and research results of the influence of element doping on the precipitated phases in maraging steels, 0.5-1.0% of W element is added to the maraging steel composition system, and at the same time, the content of Mo element in the steel is increased, so that when the grain size of the steel is ≥8.0 grade, the tensile strength Rm≥2800 MPa and the elongation A≥5%.

The invention discloses a manufacturing process of double-phase high-strength steel for additive manufacturing. The manufacturing process comprises the following steps: respectively weighing 18Ni300 powder, titanium powder and aluminum powder according to a design ratio, and pretreating the weighed 18Ni300 powder, titanium powder and aluminum powder for later use; the pretreated 18Ni300 powder, titanium powder and aluminum powder are mechanically mixed to obtain mixed powder, and the mixed powder is sieved for standby application; and the obtained mixed powder is subjected to laser direct energy deposition in-situ alloying additive manufacturing printing, and the double-phase high-strength steel is obtained. Compared with an original 18Ni300 sample, the yield strength of the obtained double-phase high-strength steel is improved by at least 20%, the ultimate strength is improved by at least 52%, and the strength amplification reaches 57% of the direct aging state amplification. And the response of the maraging steel to the in-situ heat treatment effect is further strengthened, and the mechanical property of printed parts is improved.

The invention relates to the technical field of powder metallurgy materials and intelligent manufacturing, in particular to high-strength corrosion-resistant maraging steel powder for injection molding and high-strength corrosion-resistant maraging steel prepared from the high-strength corrosion-resistant maraging steel powder. The high-strength corrosion-resistant maraging steel powder for injection molding is prepared from the following chemical elements in percentage by mass: 17 to 19 weight percent of Ni, 12 to 13 weight percent of Cr, 5 to 5.5 weight percent of Mo, 1.4 to 1.6 weight percent of Ti, 0.3 to 0.5 weight percent of Al, 0.05 to 0.1 weight percent of N, 0.15 to 0.30 weight percent of O, less than or equal to 0.02 weight percent of C, and the balance of Fe and inevitable impurity elements. The prepared high-strength corrosion-resistant maraging steel meets the extreme requirements of high strength (larger than or equal to 1800 MPa), high plasticity (the ductility ranges from 4.0% to 5.4%) and high salt spray corrosion resistance (larger than or equal to 4 hours).

The invention relates to high-thermal-conductivity die-casting die additive manufacturing metal powder and a preparation method. The high-thermal-conductivity metal powder for additive manufacturing of the die-casting die comprises the following chemical components in percentage by mass: 0.25-0.35% of C, 1t of Si, 1t of P, 1t of S, 1t of P, 1t of S, 1t of P, 1t of S and the balance of Fe and inevitable impurities. 0.1%, Mn: lt; 0.20%, Ni: lt; 3.00%, Cr: lt; 2.00%, W: 1.80-2.50%, and V: lt; the steel comprises the following components in percentage by weight: 0.1% of Fe, 2.50-3.80% of Mo, less than or equal to 0.02% of S, less than or equal to 0.025% of P, less than or equal to 0.025% of O and the balance of Fe and inevitable impurities. The metal powder has the beneficial effects that the obtained metal powder is suitable for 3D printing and is suitable for direct manufacturing of a high-load die-casting die conformal waterway insert, the application bottlenecks of existing H13 steel and 18Ni300 maraging steel in the aspects of formability, heat-conducting property and cost are solved, the forming qualification rate and heat-conducting property of an additive manufacturing inlay die are remarkably increased, the service life of the additive manufacturing inlay die is remarkably prolonged, and the metal powder is suitable for 3D printing and direct manufacturing of the high-load die-casting die conformal waterway insert. And the safety and efficient heat management requirements of the integrated die-casting die on the conformal waterway are met.

Embodiments of this application provide a maraging steel, a method for preparing a maraging steel, and an electronic device. The maraging steel includes the following alloy elements: Co, Mo, and Ti. By weight percentage, a content of Co ranges from 12 wt % to 17 wt %, a content of Mo ranges from 6 wt % to 8 wt %, and a content of Ti ranges from 0.4 wt % to 1.5 wt %. The maraging steel further includes the following alloy elements: Ni, Al, Fe, and an impurity element. By weight percentage, a content of Ni ranges from 15 wt % to 18 wt %, Al≤0.3 wt %, and the remainder is Fe and the impurity element. Embodiments of this application provide the maraging steel, the method for preparing a maraging steel, and the electronic device, so that the maraging steel can have both a high strength and high plasticity.

Provided are a maraging steel having an excellent aging behavior and a method for manufacturing the maraging steel. The maraging steel has a chemical composition containing, by mass %, C: 0.02% or less, Si: 0.1% or less, Mn: 0.1% or less, P: 0.01% or less, S: 0.01% or less, N: 0.01% or less, Ni: 12% to 25%, Co: 5% to 12%, Mo: 2% to 7%, Ti: 0.5% to 1.5%, Al: 0.01% to 0.1%, and the balance being iron and incidental impurities, the steel having a steel microstructure containing, in terms of area fraction, 90% or more of a strain-induced martensite phase.