69 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 invention discloses low-cost ultrahigh-strength maraging steel suitable for additive manufacturing. The low-cost ultrahigh-strength maraging steel comprises the following chemical components in percentage by mass: less than or equal to 0.03% of C, 13.0-15.0% of Ni, 2.5-3.5% of Mo, 2.5-3.5% of Cr, 1.3-2.5% of Mn, 0.50-0.80% of Ti, 0.05-0.15% of Al, less than or equal to 0.10% of Si, less than or equal to 0.010% of S, less than or equal to 0.010% of P and the balance of Fe. Alloy components are optimized to obtain low-cost ultrahigh-strength maraging steel components suitable for additive manufacturing, after the maraging steel components are made into wires or powder, a formed part obtained through additive manufacturing is subjected to solid solution for 1 h at the temperature of 700-850 DEG C and aging for 6 h at the temperature of 400-500 DEG C, the tensile strength of the formed part is not lower than 1.6 Gpa, and the percentage elongation after fracture is not lower than 8.0%.

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 relates to an ultrahigh-strength and high-toughness steel member and a preparation method thereof. Comprising the following steps that (1) a cobalt-free maraging steel wire is adopted, and the wire is prepared from, by mass, 0%-0.02% of C, 0.5%-0.6% of Ti, 0.1%-0.2% of Al, 13.5%-14.5% of Ni, 2.5%-3.5% of Mo, 2.5%-3.5% of Cr, 0.5%-1.5% of Mn, 0%-0.02% of Si and the balance Fe; (2) process parameters and a material increasing path of electric arc material increasing are determined; (3) component material adding is conducted; (4) aging treatment is conducted, specifically, the component obtained in the step (3) is heated to 450-480 DEG C from the room temperature, heat preservation is conducted for 6 + / -0.5 h, and then the component is taken out and air-cooled to the room temperature; and (5) subzero treatment is conducted, specifically, the component subjected to air cooling to the room temperature in the step (4) is put into a subzero medium to be cooled to-130 DEG C or below, heat preservation is conducted for 6-12 h, then the component is taken out, and the ultrahigh-strength and high-toughness steel component is obtained. The component prepared by the preparation method disclosed by the invention finally has high strength and good toughness, and has a good application value.

The invention relates to the technical field of steel and iron materials, and discloses tungsten-containing maraging ultrahigh-strength steel and a preparation method thereof. The tungsten maraging ultrahigh-strength steel comprises, by mass, 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 Fe and inevitable impurities, and the impurity elements are controlled according to the requirements that C is smaller than or equal to 0.008%, Si is smaller than or equal to 0.1%, Mn is smaller than or equal to 0.1%, P is smaller than or equal to 0.005%, S is smaller than or equal to 0.005%, N is smaller than or equal to 0.0015%, and O is smaller than or equal to 0.0015%. Based on calculation and research results of a first principle that element doping influences a precipitated phase in the maraging steel, 0.5-1.0% of W element is added into a component system of the maraging steel, meanwhile, the content of Mo element in the steel is increased, and under the condition that the grain size of the steel is larger than or equal to 8.0 level, the tensile strength Rm is larger than or equal to 2800MPa, and the elongation A is larger than or equal to 5%.

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 invention provides a welding wire and maraging steel welding method. The method comprises the steps that a to-be-welded material is subjected to solution treatment and cold treatment, and solution treatment, cold treatment and aging treatment; designing a welding groove of a material to be welded, wherein the welding groove comprises a V-shaped lock bottom butt joint groove and an I-shaped lock bottom butt joint groove; before welding, oxide layers in a welding groove and a nearby 30mm area are removed in a mechanical removal or polishing mode; the to-be-connected workpiece is assembled, wherein the local assembling clearance is not larger than x; setting welding process parameters according to the to-be-obtained front and back welding width conditions of a welding joint, setting a welding speed, a welding current and a fuse speed by gas shielded welding or setting an acceleration voltage, a welding beam current, a filament current and a rotating speed by electron beam welding; and according to the set welding process parameters, maraging steel wire filling welding is carried out under the inert gas shielding condition of gas shielded welding, or maraging steel electron beam welding is carried out under the vacuum condition.

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 discloses high-toughness maraging steel which comprises the following components in percentage by weight: less than or equal to 0.005 wt% of C, less than or equal to 0.05 wt% of Si, less than or equal to 0.05 wt% of Mn, less than or equal to 0.005 wt% of P, less than or equal to 0.005 wt% of S, 17.5-19.5 wt% of Ni, 3.5-4.5 wt% of Mo, 2.5-3.5 wt% of Al, 0.01-0.8 wt% of Nb, 0.005-0.015 wt% of B, less than 0.005 wt% of N, less than 0.01 wt% of O and the balance of Fe. Through reasonable alloy component design and optimization of preparation processes such as heat treatment, hot rolling and cold rolling, the high strength and toughness of the maraging steel are achieved, the yield strength of the prepared maraging steel is 1200-1700 MPa, the tensile strength is 1850-2100 MPa, and the ductility is 10.5-13.5%.

The present invention relates to a maraging steel suitable for hot working tools, the steel consisting of the following in weight % (wt. %): C<0.08, Si 0.1-0.9, Mn<2, Cr 4.0-6.5, Ni 2.0-5.0, Mo 3.5-6.5, Co 2.0-5.5, Cu<4.0, Nb<0.1, V<0.1, Ti<0.1, Fe and impurities as the balance.

The present invention relates to a method for producing an article out of a maraging steel, wherein the article is successively subjected to a solution annealing and heat treatment, wherein the steel has the following composition in Wt.-%:C=0.01-0.05Si=0.4-0.8Mn=0.1-0.5Cr=12.0-13.0Ni=9.5-10.5Mo=0.5-1.5Ti=0.5-1.5Al=0.5-1.5Cu=0.0-0.05Residual iron and smelting-induced impurities.

The invention belongs to the technical field of material composite reinforcement, and particularly relates to a construction method of maraging steel with a gradient nanostructure. A gradient nanostructure layer with a certain depth is formed on the surface of the maraging steel by utilizing a surface nanocrystallization technology, and the surface of the maraging steel is remarkably strengthened. The core of the method lies in that rigidity compensation is provided in the treatment process to intensify the surface plastic deformation degree, and temperature field acceleration interface segregation and interface structure adjustment are provided. And finally, a gradient nanostructure layer with the obvious strengthening characteristic is obtained on the surface of the maraging steel, and the anti-fatigue performance of the maraging steel is greatly 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.

The invention provides an electrolytic corrosion liquid and a display method of maraging steel original austenite grain boundaries, and relates to the technical field of physicochemical metallographic detection.The method comprises the steps that firstly, component design is conducted on the basis of a CALPHAD method, maraging steel is prepared through an injection molding method, and the original austenite grain boundaries are represented through electrolytic corrosion; the electrolytic corrosion liquid comprises the following components: 5-6 ml of absolute ethyl alcohol, 2-3 ml of concentrated nitric acid, 1.5-2.5 ml of hydrochloric acid, 2-2.5 ml of deionized water, 1-2 g of copper sulfate and 1-2 g of copper chloride, the electrolysis voltage is 8-10 V, the electrolysis current is 2-5 A / cm < 2 >, electrolysis is performed 2-4 times, and the electrolysis time is 8-12 s each time. According to the method, the grain boundary of the original austenite can be accurately and clearly observed by preparing the components of the corrosive liquid, so that the grain size of the austenite is further determined, and the method has important significance in counting the grain size of the austenite and efficiently and accurately obtaining experimental data.

To provide an Fe-based alloy powder for laminate molding which has excellent crack resistance and mold performance by further improving thermal conductivity of a maraging steel.SOLUTION: An Fe-based alloy powder for laminate molding is formed of an Fe-based alloy that includes, by mass% and as essential components, 10.0 to 16.0% of Ni, 6.0% or less of Mo, 0.5 to 2.5% of Ti, 0.01 to 1.0% of Al, 0.8% or less of Si, and 0.8% or less of Mn, and further includes, as optional additional components, 6.0% or less of Cr and other elements, with the balance being Fe and unavoidable impurities, wherein a value of M1 in formula (1): M1=Ni+0.8Cr+0.6Mo-0.3Ti is 13.0 or more, and a value of M2 in formula (2): M2=41.9-0.9Ni-2.0Mo-2.1Cr is 17.0 or more.SELECTED DRAWING: Figure 1

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;

Provided is a maraging steel powder which allows an additive manufacturing product that has little deformation after manufacturing and exemplary thermal fatigue life characteristics to be obtained while reducing Co to the minimum. A maraging steel powder for additive manufacturing contains, in mass %, C: 0.02% or less, Si: 0.1 to 0.3%, Ni: 16 to 20%, Co: 0.1% or less, Mo: 2.5 to 3.5%, Ti: 1.5 to 2.5%, Al: 0.01% or less, and the remainder: Fe and inevitable impurities, and a maraging steel additive manufacturing product contains C: 0.02% or less, Si: 0.1 to 0.3%, Ni: 16 to 20%, Co: 0.1% or less, Mo: 2.5 to 3.5%, Ti: 1.5 to 2.5%, Al: 0.01% or less, and the remainder: Fe and inevitable impurities.

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