4 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 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 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.

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.