14 results about "Inconel 625" patented technology

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 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 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 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 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 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 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 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%.

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 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 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.

The invention relates to the technical field of high-temperature alloy hot working, and discloses a manufacturing process of a high-temperature Inconel 625 die forging valve body, which comprises the following steps of: carrying out stepped heating on an alloy blank; the heated blank is coated with a high-temperature heat preservation lubricant, two-heating-number forging is carried out, and heat preservation treatment is carried out between heating numbers; and carrying out rapid solution heat treatment on the forged workpiece, wherein the heat treatment comprises the steps of ultrafast heating and rapid water quenching. The thermal stress is reduced through stepped heating, the plasticity is recovered and the structure is refined through two-heating-number forging and inter-heating-number heat preservation, and sensitization and harmful phase precipitation are inhibited through rapid solid solution heat treatment. By the adoption of the process, the Inconel 625 forged piece which is free of macroscopic defects, small in structure and good in strength and plasticity matching and has excellent low-temperature toughness and intergranular corrosion resistance at the same time can be prepared.

The invention relates to the technical field of stainless steel pipes, in particular to a high-corrosion-resistance stainless steel composite pipe and a preparation method thereof.The preparation method of the stainless steel composite pipe comprises the following steps that Inconel 625 alloy is rolled, welded and cleaned, and an outer pipe is obtained; stainless steel is rolled, welded, cleaned and subjected to sand blasting, and an inner pipe is obtained; after the casing pipe is assembled, the space between the inner pipe and the outer pipe is filled with bonding powder, and a composite pipe blank is obtained; drawing and reducing to obtain a stainless steel composite pipe; the bonding powder comprises tin powder, nickel powder, molybdenum powder, copper powder and nano titanium carbide powder; the method has the advantage that the corrosion resistance and the mechanical property of the stainless steel composite pipe are improved.

This invention belongs to the field of metal materials technology and provides a method for preparing a composite plate of Inconel 625 nickel-based alloy and X65 pipeline steel, including billet assembly, welding, heating, rolling, and cooling; adopting a multi-pass gradient rolling + staged gradient cooling process, controlling the bainite content in the phase transformation products to reach 60%~70%, so that the composite plate does not delamination failure when the bending radius reaches 2.5 times the plate thickness, the interface diffusion layer thickness is 8~12µm, and the shear strength is increased to over 350MPa.