39 results about "Inconel 625" patented technology

The invention discloses a bimetal composite plate with an X90-grade composite layer made of nickel base alloy Inconel625 and a manufacturing method of the bimetal composite plate. The bimetal composite plate comprises the following chemical components in percentage by weight: base material components including C, Si, Mn, Cr, Ni, Mo, Cu, Nb, V, less than or equal to 0.05% of Al, Ti and the balance of Fe and inevitable impurity elements; the composite material comprises the following components: less than or equal to 0.08% of C, less than or equal to 0.5% of Si, less than or equal to 0.5% of Mn, 20.0-23.0% of Cr, 8.0-10.0% of Mo, 3.15-4.15% of Nb, less than or equal to 5.0% of Fe, less than or equal to 0.05% of Al, less than or equal to 0.05% of Ti and the balance of Ni and inevitable impurity elements. According to the invention, the components are comprehensively optimized, and proper rolling and tempering processes are matched to obtain the bimetal composite plate with yield strength not lower than X90 and excellent corrosion resistance for the oil and gas transmission line pipe.

The present invention belongs to the technical field of nickel-based alloy connection, and specifically relates to a brazing method for improving the high-temperature welding performance of nickel-based alloy joints and a prepared multi-layer welded joint. First, the brazing material is processed into an amorphous brazing foil, and then the amorphous brazing foil is pre-placed between the joint surfaces of the workpieces to be welded of the Inconel625 nickel-based alloy, and then the workpieces to be welded are fixed and placed in a vacuum brazing furnace for brazing. After the brazing is completed, the workpiece group is cooled to below 100°C and then solution treated in a vacuum brazing furnace. The amorphous foil-shaped brazing material used in the present invention has a small difference in melting point from the parent material, which is conducive to capillary action and can optimize the formation and performance of the brazed joint; the solution treatment can improve the distribution and morphology of brittle phases such as borides in the brazing seam. The present invention can be used as a special brazing method for multi-layer brazing joints or Inconel 625 nickel-based alloys, and has great application prospects.

This invention belongs to the field of laser surface engineering and metal matrix composite technology, and provides a Ti / Nb microalloyed Inconel 625 toughening coating, its composite powder, and preparation method. The composite powder is composed of gas-atomized Inconel 625 alloy powder, titanium powder, and niobium powder, with a Ti to Nb mass ratio of (0.8–1.2):1 and a total addition amount of 0.8–1.5 wt%. A dual-laser cladding process is employed. An initial coating is first formed by laser cladding in an inert atmosphere, followed by in-situ pulsed laser shock blasting when cooled to 900–1000℃. After slow cooling, a toughened coating is obtained. The resulting coating contains 10–20 nm dispersed Ni3(Nb,Ti) composite γ-rays. , The coating contains no Ni2(Nb,Si) Laves phase. It exhibits both high strength and high toughness, along with excellent high-temperature stability.

The invention relates to a preparation method of a diamond wear-resistant coating. The preparation method is characterized by comprising the following steps that S1, diamond brazing filler metal and wear-resistant powder are prepared; s2, after the surface of a to-be-machined workpiece is coated with diamond brazing filler metal, the to-be-machined workpiece is dried in a constant-temperature furnace, and the to-be-machined workpiece with a diamond brazing filler metal layer is obtained; and S3, laser cladding equipment is used for melting the diamond brazing filler metal layer through laser, meanwhile, an annular nozzle is matched for feeding wear-resistant powder, and the diamond wear-resistant coating formed by combining the molten diamond brazing filler metal layer and the corresponding wear-resistant powder in a cladding mode is formed on the surface of the to-be-machined workpiece. The diamond brazing filler metal is composed of, by mass, 10%-15% of diamond and 85%-90% of nickel-based brazing filler metal powder. And the wear-resistant powder is selected from one of Stellite6, Stellite12, Incone625, and Fe90 + WC wear-resistant alloy powder. The diamond wear-resistant coating is high in strength, good in wear resistance, simple and efficient.

The application belongs to the technical field of surface protection, and discloses a double-layer coating for a boiler heating surface and a preparation method thereof; wherein the double-layer coating comprises an inner layer coating and an outer layer coating; in the inner layer coating, the mass percentage of rare earth oxide is 0.1% to 0.3%, and the mass percentage of Inconel 625 is 99.7% to 99.9%; the outer layer coating is used for spraying on the surface of the inner layer coating, and in the outer layer coating, the mass percentage of Cr3C2 is 30% to 50%, and the mass percentage of Inconel 625 is 50% to 70%. The double-layer coating provided by the application has extremely excellent high-temperature chlorine corrosion resistance of the inner layer coating, and on the basis of the high-temperature corrosion resistance of the outer layer coating, the outer layer coating has extremely excellent erosion resistance, and can effectively prolong the service life of the boiler heating surface tube bundle steel.

The application provides a hot working method for significantly improving the dynamic recrystallization volume fraction of a nickel-based superalloy, which comprises the following steps: firstly, placing Inconel 625 alloy into a heat treatment furnace at 1000-1100 DEG C and keeping it for 30-90 min for solid solution treatment, and then water cooling; secondly, increasing the temperature of the Inconel 625 alloy after the solid solution treatment to 700-750 DEG C and keeping it for 50-100 h, and then water cooling while applying a stress of 100-160 MPa, so as to uniformly precipitate a delta phase; and finally, increasing the temperature of the Inconel 625 alloy after the aging heat treatment to 870-950 DEG C and keeping it for 2-10 min, and then hot deforming the alloy at a strain rate of 0.1-0.001 s ‑1 The application can obtain a large amount of uniformly distributed delta phase with appropriate size in a short time by applying an external stress, avoids the problem of the delta phase being distributed along the grain and being coarse in size caused by traditional aging heat treatment, ensures that the delta phase fully plays a role in the subsequent hot deformation process by using appropriate process parameters, greatly improves the dynamic recrystallization volume fraction, and has obvious advantages in grain refinement and uniform structure in the hot working process of the nickel-based superalloy.

The invention discloses a flux-cored wire and a preparation method and application thereof. The flux-cored wire comprises an outer skin and a flux core, and the outer skin wraps the flux core and accounts for the mass percentage of the total weight of the flux core; comprising the following components: 83.5%-85% of Inconel 625 alloy powder, 0.2%-2% of copper powder, 4%-6% of an alloying agent, 5%-8% of a slag former and 2%-4% of a deoxidizing agent, and the sum of the dosage of the substances is 100%. A welding head welded by the flux-cored wire disclosed by the invention also has excellent low-temperature toughness under the condition of ensuring high strength.

The present application relates to a kind of low stress gradient annealing process of X65 steel / Inconel625 composite plate, belong to the heat treatment technical field of metal composite material, it is applicable to the structure regulation and interface strengthening of hot-rolled composite material.The process includes three stages in turn: the first stage is kept at 20~50 ℃ below X65 steel recrystallization temperature, time t1 satisfies t1=2~4 min / mm, protective atmosphere is nitrogen hydrogen mixed gas;Second stage is kept at 20~50 ℃ below Inconel625 nickel-based alloy recrystallization temperature, time t2=(0.6~0.8) t1, protective atmosphere is vacuum;Cooling stage is cooled at the cooling rate V2≥15 ℃ / min in 650~700 ℃ interval, at other stages with rate V1≤30 ℃ / h cooling to 300 ℃, protective atmosphere is high-purity argon.The present application can significantly improve the interface bonding strength of composite plate, reduce residual stress and improve the stability of organization, provide high reliability composite plate for petroleum and natural gas, chemical equipment and marine engineering and other fields.

The invention relates to the technical field of manufacturing of square throttle valve forgings, in particular to a production and manufacturing process of Inconel 625 square throttle valve forgings for deep sea oil and gas exploitation, which comprises the following steps: firstly, selecting proper raw materials according to an alloy formula of the square throttle valve forgings, smelting the raw materials into an electroslag ingot through a smelting process, and then treating the surface of the electroslag ingot, oxide skin and defects are removed; secondly, the step forging process is innovated, through the collaborative design of three-heating-number cogging forging and two-heating-number cutting forging and the combination of the large reduction rate and multidirectional deformation of the first pass, the strain penetration depth of the thick section is remarkably increased, compared with a traditional process, the effective strain cumulant is greatly increased, the problem that deformation at the corners of the square valve is not uniform is thoroughly solved, and the yield of the square valve is improved. And a narrow temperature area is accurately controlled, the finish forging temperature is monitored in real time by adopting an infrared thermometer, and a forgeable temperature window is stably controlled within the range of 170-200 DEG C in cooperation with die preheating and graphite lubrication, so that the risk of microcracks caused by the finish forging temperature less than 950 DEG C is avoided.

The invention relates to the technical field of cold spraying, in particular to a method for preparing a CuCrNb-Incone625 sandwich structure liquid rocket combustion chamber through cold spraying. Comprising the following steps: S1, preparing CuCr4Nb2 alloy powder into a base layer by adopting a cold spraying process; s2, CuCr4Nb2 alloy powder is sprayed to the surface of the base layer through a cold spraying technology to form a closed layer, and the inner wall of the combustion chamber is obtained; s3, Inconel 625 alloy powder is sprayed to the sealing layer through a cold spraying technology to form an Inconel 625 alloy layer, and a combustion chamber blank is obtained; and S4, performing hot isostatic pressing on the combustion chamber blank to obtain the combustion chamber. The inner wall and the outer wall of the combustion chamber are prepared through the cold spraying technology, compared with a traditional diffusion welding method, the mechanical property of the copper alloy inner wall is reserved, the copper alloy inner wall is prevented from being softened at the welding high temperature, and the service life of a liquid rocket engine is prolonged.

The application discloses a rolling method of Inconel 625 / X65 composite plate. The rolling composite plate blank comprises Inconel 625 nickel-based alloy, two pieces of X65 low alloy steel base materials after being opened and reduced, and pure Ni sheet; after the composite material and the surface to be compounded are mechanically processed, the base material, the Inconel 625 composite layer, the Ni sheet and the base material are sequentially stacked and assembled into an asymmetric composite blank in sequence, and the compression ratio of the effective steel and iron base material is 8.75-9.77, which is 25%-39.5% larger than the compression ratio of the conventional symmetric assembly rolling, so that the base material of the composite plate has excellent low-temperature toughness. At the same time, the Inconel 625 composite layer is always located in the inside of the composite blank during the rolling process, so that the temperature of the Inconel 625 composite layer falls in the sensitization temperature range during the rolling process.

The invention provides a light-weight metal composite material of an automobile exhaust rotor and a preparation method of the light-weight metal composite material, and relates to the field of automobile exhaust rotors, the light-weight metal composite material comprises a high-temperature-resistant outer layer of 1 mm, middle transition copper foil and a light-weight inner layer of 2 mm, metallurgical bonding between the high-temperature-resistant outer layer and the light-weight inner layer is achieved through a diffusion welding process, according to the scheme, through compounding of the high-temperature-resistant outer layer and the light-weight inner side and matching of the specific thickness of each layer, it is guaranteed that the exhaust rotor has good strength, toughness, corrosion resistance, plasticity and high-temperature resistance, meanwhile, the whole exhaust rotor has low density, compared with a traditional Inconel 625 material, the density is smaller, and the service life of the exhaust rotor is prolonged. And the power loss of the engine caused by mass is reduced.

The invention relates to a low-stress gradient annealing process of an X65 steel / Inconel 625 composite plate, belongs to the technical field of heat treatment of metal composite materials, and is suitable for structure regulation and interface strengthening of hot-rolled composite materials. The process sequentially comprises three stages, in the first stage, heat preservation is conducted at the temperature 20-50 DEG C below the recrystallization temperature of the X65 steel, the time t1 meets the condition that t1 = 2-4 min / mm, and the protective atmosphere is nitrogen and hydrogen mixed gas; in the second stage, heat preservation is conducted at the temperature 20-50 DEG C below the recrystallization temperature of the Inconel 625 nickel-based alloy, the time t2 is equal to (0.6-0.8) t1, and the protective atmosphere is vacuum; in the cooling stage, the cooling rate V2 is larger than or equal to 15 DEG C / min in the interval of 650-700 DEG C, in the other stages, cooling is conducted to 300 DEG C at the rate V1 smaller than or equal to 30 DEG C / h, and the protective atmosphere is high-purity argon. The interface bonding strength of the composite board can be remarkably improved, the residual stress is reduced, the structure stability is improved, and the high-reliability composite board is provided for the fields of petroleum and natural gas, chemical equipment, ocean engineering and the like.

The invention discloses a flux-cored wire for inhibiting element interdiffusion between a steel pipe column and a coating and a preparation method thereof, and belongs to the technical field of high-temperature alloy surface engineering technology.The flux-cored wire comprises a metal type flux-cored powder and an alloy tape skin, wherein the alloy tape skin is an Inconel 625 nickel-based alloy tape skin.The powder packaging rate of the flux-cored wire is 20-25 wt.%.The invention adopts a manual TIG welding process to perform cladding on the surface of a Q345 low-alloy steel, argon can effectively isolate air around a welding molten pool, oxidation and nitridation of molten pool metal is avoided, a tungsten electrode arc is stable, the melting depth is relatively shallow, heat input in the welding process is easy to adjust, the forming quality of a cladding layer is high, full-position welding is suitable, and the invention is suitable for preparation of the cladding layer.

The invention belongs to the technical field of electric arc additive manufacturing, and particularly relates to a preparation method of a WC particle reinforced electric arc additive manufacturing Inconel 625 gradient material, a Q235 steel plate is used as a base material, an Inconel 625 nickel-based alloy is used as a welding wire, electric arc additive manufacturing is completed in a layer-by-layer deposition mode, four gradient areas are divided from bottom to top in the stacking direction, each gradient area is provided with one to seven deposition layers, and the deposition layers are arranged in the four gradient areas. The addition amount of the WC powder in each deposition layer in one gradient area is consistent, and the addition amounts of the four gradient areas are respectively 35wt%, 25wt%, 15wt% and 5wt% from low to high along the stacking direction to form gradient distribution. According to the method, the technical prejudice is overcome, a uniform reinforced phase distribution or simple mechanical layering strategy commonly adopted in traditional composite material manufacturing is abandoned, the service requirement of toughness and strength balance is considered, and the gradient change of the addition amount of WC from high to low from a substrate to the top of a component is achieved.

The invention discloses a design method of a Co-Cr-Ni-Ti-Al-V series eutectic high-entropy alloy with light weight and high temperature resistance performance. An aero-engine case is in an extreme working environment, the requirement for the performance of a workpiece material is harsh, and currently used nickel-based superalloy (such as Inconel 625 superalloy) is large in material density and does not meet the development target of the modern aviation industry. In recent years, development of the high-entropy alloy provides a direction for research and development of novel engine case materials, and meanwhile, the Co-Cr-Ni-Ti-Al-V series eutectic high-entropy alloy with light weight and high temperature resistance is designed in consideration of the problems of poor castability, high brittleness and the like of the alloy. According to the method in the claim 1, the density of the manufactured alloy ranges from 5.5 g / cm < 3 > to 6.8 g / cm < 3 > and is 19%-35% lower than the density of nickel-based high-temperature alloy (for example, the material density of Inconel 625 high-temperature alloy is 8.4 g / cm < 3 >). According to the method in the claim 1, the high-temperature mechanical property of the material is tested, it is found that continuous strengthening after yield is observed in the alloy manufactured within the service temperature range of the Inconel 625 nickel-based high-temperature alloy at 650-1100 DEG C, and the compressive strength exceeds 1000-1300 MPa; the compressive strength (for example, the compressive strength of Inconel 625 high-temperature alloy at the service temperature of 850 DEG C is about 700 MPa) of the nickel-based high-temperature alloy is 43%-86% higher than that of the nickel-based high-temperature alloy; no obvious crack is observed in the compressed sample. As the test temperature rises to 850-1300 DEG C (for example, the compressive strength of the Inconel 625 high-temperature alloy at the temperature of 1100 DEG C is about 400 MPa), the load on a stress-strain curve is reduced, and the strength is reduced to about 800-1000 MPa. According to the method in the claim 1, the high-temperature oxidation resistance of the material is tested, and after the material is oxidized for 200 hours at the temperature of 650-1100 DEG C, the thickness of an oxide layer of the manufactured alloy is measured to be about 3-5 microns and is 45%-67% lower than the thickness of an oxide layer of a nickel-based high-temperature alloy (for example, the thickness of an oxide layer measured after an Inconel 625 high-temperature alloy is oxidized for 200 hours at the temperature of 850 DEG C is measured to be about 9 microns). Compared with a nickel-based high-temperature alloy, the material designed by the invention has the advantages in material density, high-temperature mechanical property and high-temperature oxidation resistance, has a good development prospect in application materials of aero-engines, and also has very important reference value for subsequent design and application of eutectic high-entropy alloys.

The invention provides a wireless signal transmission device and method in a closed annulus of an underwater production well. The wireless signal transmission device comprises an oil pipe nipple, a casing pipe nipple and a protective sleeve. The oil pipe nipple is made of Inconel 625 alloy, is connected with an underground oil pipe in a meshed mode through threaded connectors arranged at the two ends and is connected with a cable laid on the oil pipe through a cable interface, the interior of the nipple is hollow, the nipple is used for an oil and gas channel, an elastic positioning block is arranged outside the nipple, and the coil and the energy transmission module are jointly arranged in an inner containing cavity of the nipple. The material of the casing pipe nipple is the same as that of a common casing pipe, the casing pipe nipple is connected with an underground casing pipe in a meshed mode through threaded connectors arranged at the two ends, a positioning sleeve is arranged on the inner wall of the pipe nipple, a protective sleeve is arranged on the outer wall of the pipe nipple, the protective sleeve is made of Inconel 625 alloy and is fixed to the casing pipe nipple in a hoop connection mode, and a containing cavity is formed in the sleeve. The coil, the energy signal transmission module and the battery energy storage module are arranged in the power supply module together, and power is supplied to an underground instrument through the interface. All the modules are matched with one another, and underground wireless electric energy signal transmission is achieved. The device can be arranged in a main well hole and all branch well holes in series along a cable in a multi-branch well according to requirements, the underground integrity monitoring range is expanded, and the device has the advantages of being easy to install, stable, reliable and free of interference on underground production.

The invention discloses a corrosion-resistant and wear-resistant IN625-based composite high-entropy alloy and a preparation method thereof, and belongs to the technical field of wear-resistant and wear-resistant high-entropy alloys, CoCrFeNiMo high-entropy alloy components are introduced into an Inconel 625 matrix by adopting a wire arc additive manufacturing process, and the corrosion-resistant and wear-resistant IN625-based composite high-entropy alloy is prepared. According to the method, by controlling the adding amount of the CoCrFeNiMo high-entropy alloy components, the electrochemical uniformity of the alloy surface is optimized, and formation of a more stable compact passive film is promoted. And by reducing component fluctuation between a matrix and a precipitated phase, inter-phase micro galvanic corrosion driving force can be remarkably inhibited, so that the material shows more excellent thermodynamic stability and chemical protection performance in a chlorine-containing corrosive medium.

The invention discloses an 8630 low alloy steel and Inconel 625 nickel-based alloy surfacing process method. The 8630 low alloy steel and Inconel 625 nickel-based alloy surfacing process method comprises the following steps: a, producing and preparing the 8630 low alloy steel; 8630 low alloy steel is prepared through an electric furnace smelting technology, a ladle refining furnace refining technology, a vacuum refining technology and a continuous casting technology; b, selecting a reasonable welding material, namely an Inconel 625 nickel-based alloy; and c, a pulse hot wire TIG surfacing technology is adopted, 8630 low alloy steel is used as a surfacing matrix, and surfacing is conducted on the 8630 low alloy steel and the Inconel 625 nickel base alloy. The post-welding technical indexes of the novel welding material are as follows: the 8630 mechanical property is greater than or equal to API 6A 75K, the post-welding 625 surfacing layer mechanical property is greater than or equal to API 6A 75K, the impact toughness (-60 DEG C) AKV is greater than or equal to 27 / 20J, the post-welding 8630 hardness is 207-237 HBW, the fusion line + 3 mm Fe% is less than or equal to 5%, no macroscopic defect exists, and various requirements of high pressure resistance, high hydrogen sulfide and the like required by the material of oil and gas drilling and production equipment are met.

The invention discloses an interlayer cooling and printing strategy collaborative strengthening electric arc additive manufacturing alloy method, and belongs to the technical field of additive manufacturing, and the method comprises the following steps: aiming at Inconel 625 alloy, firstly cleaning a substrate, and adopting two-stage grouped interval printing: two continuous welding beads form a group, the group is spaced by two widths, and the two welding beads form one group; a basic welding bead is printed and directionally cooled for 5 s, and then the repair welding bead is reversely filled and cooled for 25 s; and in cooperation with a three-layer circulation rotation strategy, 180-degree reverse deposition is conducted on the first layer and the second layer, clockwise 90-degree rotation deposition is conducted on the third layer, and the equiaxed crystal-columnar crystal alternating heterogeneous component is manufactured in a circulation mode. According to the method, a gradient heterogeneous structure is formed through cooperative regulation and control of the path and the rotating and cooling time sequence, dispersion and precipitation of MC type carbide are promoted, high-density pre-dislocation is introduced, multi-element strengthening is achieved, the high-temperature mechanical property is greatly improved, and the yield strength at the temperature of 650 DEG C and the yield strength at the temperature of 800 DEG C are improved by 191% and 154.55% respectively compared with a traditional process. The process does not need additional equipment and subsequent heat treatment, and is suitable for industrial preparation of large-size components.

The invention discloses a method for smelting a high-temperature alloy Inconel 625 in a consumable vacuum furnace. In the smelting process, the melting rate of a cast ingot is determined according to a formula (I). According to the method, the stability of the smelting process can be kept, open arc and broken arc can be avoided in the smelting process, so that the stability of the smelting process is kept, and the qualified consumable remelting ingot can be prepared. According to the method, by accurately controlling the melting rate, it is guaranteed that the arc length value is 8-10 mm in the steady-state process, the smelting process can be accurately controlled, the production process is stabilized, the component defects of the head and the tail of the cast ingot can be eliminated, and meanwhile the defects of the dead head of the cast ingot can be avoided.

The invention relates to a method for avoiding crystal mixing of an Inconel 625 forge piece and a product of the Inconel 625 forge piece. The method comprises the steps that rolling is conducted, specifically, a forge piece is heated to the temperature T DEG C for a preset time, then multi-heating-number rolling is conducted on the forge piece, the deformation amount of each heating number is controlled not to exceed D, and when T ranges from 1080 DEG C to 1150 DEG C, D ranges from 30% to 45%; and when T is less than 1080 DEG C, D = (-0.34 T + 370) * 100%, and if the calculated D is less than 15%, the value of D is 15%.

This invention discloses a method for smelting Inconel 625 alloy steel ingots using a VODC refining furnace, comprising the following steps: melting pure alloy scrap steel as raw material according to the chemical composition of the Inconel 625 alloy steel ingot to obtain molten alloy steel; mixing the molten alloy steel with a first slag and performing argon-oxygen mixed blowing decarburization in a VODC refining furnace to obtain a first molten steel; subjecting the first molten steel to continuous vacuum carbon deoxidation in a VODC refining furnace to obtain a second molten steel; mixing the second molten steel with the second slag and performing reduction and degassing in a VODC refining furnace to obtain a third molten steel; subjecting the third molten steel to weak argon gas stirring in a ladle to remove inclusions to obtain a fourth molten steel; and casting the fourth molten steel under a protective atmosphere to obtain an Inconel 625 alloy steel ingot. This invention employs vacuum argon-oxygen combined blowing technology, vacuum carbon deoxidation technology, vacuum aluminothermic reduction technology, and closed casting technology, achieving low manufacturing costs while improving ingot quality.

The application discloses a method for controlling the microstructure of an in-situ NbC reinforced Inconel 625 composite coating by laser remelting. The method is operated on a substrate for N times according to the following steps: under a protective gas, composite powder is deposited on the surface of the substrate by laser cladding to form a composite coating, and then the composite coating is subjected to 1-2 times of laser remelting treatment. The method can effectively ensure the uniformity of the microstructure of the in-situ NbC reinforced Inconel 625 composite coating, improve the microhardness, wear resistance and high-temperature oxidation resistance, and the average microhardness HV is up to 379.1 HV, the friction coefficient COF is as low as 0.4992, and the oxidation kinetic constant Kp is as low as 0.0883.

The invention provides a high-toughness nickel-based welding wire, a preparation method and a groove form, and belongs to the technical field of metal materials. The high-toughness nickel-based welding wire comprises powder and a welding skin, and the powder comprises 22.0%-25.0% of Fe, 25.0%-30.0% of Cr, 10%-15% of Co, 1.0%-2.0% of Nb, 3.0%-5.0% of Al, 5.0%-7.0% of V, 5.0%-7.0% of W, 3%-5% of Mo, 0.5%-1.0% of B, 0.5%-1.0% of Zr, 0.4%-0.8% of CeO2, Y2O3, La2O3 and the balance Ni. And the welding skin is an Inconel 625 nickel strip. Optionally, the particle size of the medicine powder is 100 to 200 meshes. The solid solution strengthening effect is achieved by designing a weld joint alloy system with solid solution strengthening as a main part and precipitation strengthening as an auxiliary part, wherein the weld joint alloy system comprises various alloy elements such as Cr, Co, Mo, Nb, V and W; al is added to form a certain amount of gamma'strengthening phase, and B, Zr and rare earth oxide are added to remarkably improve the grain boundary bonding strength, so that a finally formed welding seam is excellent in obdurability.

The present disclosure relates to an armor packaging for a cable comprising an inner armor layer and an outer armor layer, the inner armor layer and the outer armor layer formed by armor wires made from an alloy material with high acid resistance. The alloy material may, for example, be selected from the group of Inconel 625, Inconel 825, Incoloy 27-7MO, HC265, C-276, and MP35N. In addition, the cable may include an acid isolation polymer layer disposed radially between the inner armor layer and an outer armor layer of the armor packaging.

The utility model provides a point rail based on a laser cladding gradient coating structure. The point rail comprises a point rail metal base body, an interface bonding strengthening layer, a toughness impact-resistant layer, a wear-resistant strengthening layer, a corrosion-resistant strengthening layer and a surface function optimization layer. The interface bonding strengthening layer is made of Fe320, the toughness impact-resistant layer is made of BH350 bainite steel, the wear-resistant strengthening layer is made of 40Cr steel, the corrosion-resistant strengthening layer is made of Inconel 625, and the surface function optimizing layer adopts copper powder as a conducting layer. According to the gradient coating structural design, the hardness, the abrasion resistance, the impact resistance, the corrosion resistance and the conductivity of the point rail are improved, the service life of the point rail is prolonged, the frequency of maintenance and replacement is reduced, and the operation cost is reduced. According to the gradient coating structure design achieved through the laser cladding technology, all the layers are tightly combined, a composite structure with excellent overall performance is formed, and a more reliable and efficient solution is provided for use of the coating.

The invention discloses a laser melting forging method of a Si3N4 / Y2O3 reinforced nickel-based composite material and a coating, and belongs to the technical field of laser surface engineering. The method comprises the following steps: firstly, mixing alpha-Si3N4, Y2O3 and Inconel 625 nickel-based alloy powder to prepare a composite powder material; and then under the protective atmosphere, the powder material is conveyed to the surface of the pretreated base body, cladding laser is adopted to form a molten pool, pulse laser is synchronously adopted to conduct in-situ impact forging on the molten pool or a pasty area at the solid-liquid interface of the molten pool, and finally cooling is conducted to obtain the coating. According to the invention, through the synergistic enhancement effect of alpha-Si3N4 and Y2O3 and the combination effect of a laser melting forging process, crystal grains are refined in the coating, interface defects are eliminated, and residual compressive stress is introduced, so that the obtained coating combines high hardness and high strength and toughness, laser cladding manufacturing defects are reduced, wear resistance is improved, and the service life of the coating is prolonged. The method is especially suitable for surface strengthening of high-temperature wear-resistant parts in the fields of aerospace and energy power.

The invention discloses a nano lanthanum oxide modified Inconel 625 nickel-based superalloy and a preparation method thereof, and belongs to the technical field of metal additive manufacturing and superalloy materials.La2O3 particles with the particle size being 30-50 nm and Inconel 625 alloy powder with the particle size being 53-105 [mu] m are evenly dispersed through a ball-milling powder mixing technology, and then the nano lanthanum oxide modified Inconel 625 nickel-based superalloy is prepared through laser directional energy deposition forming; wherein the addition amount of La2O3 particles is 0.3 wt.%-0.9 wt.%, and the addition of a proper amount of La2O3 can promote grain refinement of a gamma-Ni matrix in the solidification process, relieve segregation of Nb / Mo among dendritic crystals and remarkably reduce formation of Laves phases and MC carbides, so that a microscopic structure is more uniform, the tensile strength and the ductility are both superior to those of a control sample without addition of La2O3, and synergistic improvement of strength and toughness is achieved. The method has the advantages of being small in addition amount, simple in process and remarkable in performance improvement, and a new technical approach is provided for structure regulation and performance optimization of the nickel-based high-temperature alloy in the field of additive manufacturing.

The application discloses a laser fused forming Inconel 625 alloy differential heat treatment method based on deposited state non-equilibrium organization characteristics, and relates to the technical field of metal additive manufacturing and heat treatment. The laser fused forming deposited state Inconel 625 alloy is heated to 700 DEG C at a room temperature with a temperature rising rate of 10 DEG C / min, and is kept for 13 hours; or the laser fused forming deposited state Inconel 625 alloy is heated to 1150 DEG C, kept for 1 hour, then cooled to 700 DEG C at a cooling rate of 50 DEG C / h, kept for 19 hours, then cooled to 600 DEG C at a cooling rate of 50 DEG C / h, kept for 24 hours, and then cooled to the room temperature. The application abandons the traditional 'complete homogenization' treatment concept, takes the columnar crystal, cellular substructure in the deposited state organization and Nb and Mo microsegregation enriched along the cellular boundary as available organization genetic precursors, realizes the customized synergistic regulation of mechanical properties and corrosion resistance through 'genetic utilization' or'reconstruction optimization' two paths.