41results about How to "Less metallurgical defects" patented technology

The invention discloses a process method, in particular a process method for reducing metallurgical defects of a GH4169 nickel-based alloy ingot, and belongs to the technical field of nickel-based alloy remelting production technology. Provided is a process method for reducing metallurgical defects of GH4169 nickel-based alloy ingots with few finished product quality defects. The process method uses the GH4169 nickel-based alloy smelting ingot obtained by vacuum induction melting as the base ingot, and obtains reduction of the metallurgical defects of the GH4169 nickel-based alloy ingot through one homogenization treatment, one quick forging upsetting and one remelting.

The present invention discloses an aluminum alloy evaporator inner wall thin plate and a continuous casting rolling production process thereof. The thin plate adopts an aluminum manganese alloy as a base, contains silicon, iron, copper, manganese, magnesium, zinc and titanium, and is prepared by adopting a continuous casting rolling production process. The process comprises the following steps: adding raw materials to a smelting furnace to carry out melting, refining, and residue removing; discharging the resulting material to a cast rolling machine from the furnace to carry out cast rolling; carrying out a first annealing treatment on the cast-rolled plate material to reduce needle-like FeAl3 and influence on mechanical property by a phase composition, wherein the phase composition and the Al-Mn solid solution achieve phase equilibrium; carrying out cold rolling on the first-annealed plate material 5-6 times; carrying out a second annealing treatment on the cold-rolled plate material; and carrying out foil rolling 1-2 times to prepare the aluminum alloy evaporator inner wall thin plate. The technical scheme of the present invention has the following characteristics that: good moldability, good weldability, and good corrosion resistance are provided, structure and performances are uniform, metallurgical defects are less, anisotropy is low, strength is high strength, elasticity is good, and the like.

The invention discloses a manufacturing method, in particular discloses a manufacturing method for a GH4169 nickel-based alloy ingot with low metallurgical defects, and belongs to the technical field of nickel-based alloy remelting production technology. Provided is a method for manufacturing a GH4169 nickel-based alloy ingot with low metallurgical defects, which can significantly reduce the metallurgical defects of the GH4169 nickel-based alloy ingot. The manufacturing method uses the GH4169 nickel-based alloy ingot obtained by vacuum induction melting as the base ingot, and obtains the GH4169 nickel-based alloy ingot with low metallurgical defects through two remelting, one homogenization treatment and one rapid forging and drawing, wherein, The sequence of the homogenization treatment and the rapid forging and drawing process is arranged between two remelting processes.

The invention discloses a preparation method for high-purity titanium nickel copper shape memory alloy ingots, and relates to the technical field of shape memory alloy preparation. Raw materials are screened, cleaned and dried; the raw materials comprise sponge titanium particles, electrolytic nickel particles, high-purity copper particles and phosphorus copper intermediate alloys; after the driedraw materials are weighed, the materials are paved in a smelting furnace in sequence according to a first preset condition; the materials are smelted according to a vacuum induction smelting technology, wherein the smelting process comprises power supply, degassing, refining and casting; the aftertreatment is performed on ingots after casting according to a second preset condition by adopting a hot isostatic pressing method; and then, the flaw detection, the riser cutting and the bottom cushioning are performed on the ingots after aftertreatment in sequence to obtain high-purity titanium nickel copper ingots. The preparation method achieves the technical effects of convenience to prepare the ingots, controllable and lower content of impurity element O, high content stability of the O element, fine grain structure and great reduction of metallurgy defects.

The invention discloses a neodymium-iron-boron permanent magnet material, a preparation method and a magnetic field auxiliary direct casting device. A main magnet of the device is a circular-ring-shaped magnet which is magnetized in a radial mode. A first disc-shaped repulsion magnet with the magnetic field direction being axially upward is arranged below the center of the main magnet, and a second disc-shaped repulsion magnet which is magnetized in a radial mode is arranged on the periphery of the first repulsion magnet. A regulating magnet is arranged at the upper end of the main magnet, second soft iron is arranged on the upper portion of the regulating magnet, first soft iron is arranged outside the regulating magnet, and a circular-ring-shaped magnet guide magnet which is magnetized downwards in the axial direction is arranged outside the main magnet. The chemical general formula of the neodymium-iron-boron permanent magnet material is [Nd (85-x-y) CoxFeyAlzB (15-z)] (100-a) Ma, wherein in the formula, x+y is larger than or equal to 30 and smaller than or equal to 70, z is larger than or equal to 0 and smaller than or equal to 10, and a is smaller than and equal to 4. Compared with a material prepared without adding magnetic fields, the performance of the neodymium-iron-boron permanent magnet material is greatly improved, the preparation process is simple, cost is low, products are dense, and the neodymium-iron-boron permanent magnet material is suitable for industrial production.