115 results about "Ni cr alloy" patented technology

The invention discloses a preparation method of a surface-modified ZTA ceramic particle reinforced steel based composite material. The preparation method comprises the steps that sensitization and activation treatment is conducted on ZTA particles, surface plating is conducted, the ZTA particles are plated with nickel and chromium to achieve surface metallization by controlling the components andthe proportion of a plating solution, the ZTA particles plated with Cr-Ni layers, Ni-Cr alloy powder and Al powder are put into a graphite mold to be made into a preform which is of a honeycomb structure through vacuum sintering, molten metal is poured by adopting a casting infiltration method, and after cooling is conducted, the reinforced steel based composite material is obtained. According tothe preparation method of the surface-modified ZTA ceramic particle reinforced steel based composite material, the ZTA particles are plated with nickel and chromium to achieve surface metallization bycontrolling the components and the proportion of the plating solution, the wet problem with a metal matrix is solved, and then the mechanical property of the composite material is improved; and meanwhile, the technology is easy to operate, the cost is reduced to a large extent, no toxicity or pollution is generated, the great potential on increasing the economic benefit and the social benefit isachieved, and the good prospect of being applied to the harsh abrasive wear condition is achieved.

The present invention relates to the field of electrolysis process for depositing metal, and features that Fe-Ni or Fe-Ni-Cr alloy foil is produced through electrolytic deposition in a water solution system of sulfate and chloride or sulfate, chloride and trivalent chromium. The electrolytic production process of alloy foil has short flow path, stable electrolyte, easy maintenance, simple waste water treatment, easy control of foil components and thickness, low cost and other advantages. The alloy foil has its physical and chemical performance, especially magnetic performance, higher than that produced through rolling process, and the produced Fe-Ni and Fe-Ni-Cr alloy foil may be used in electronic, telecom and electric industry as excellent soft magnetic material, cell skeleton material and packing material.

The invention provides a honeycomb structure alloy material and application thereof. The alloy material is prepared through the following additive manufacturing method, and the method comprises the first step of flatly laying particles to obtain a current layer, wherein the particles are selected from Fe-Cr-Al alloy, Ni-Cr alloy or Fe-Mo-W alloy; the second step of using laser beams to scan the current layer according to a preset honeycomb structure section profile of the current layer so that the particles can be sintered and a cross section layer can be obtained; the third step of repeating the first step and the second step on the cross section layer for multiple times till the honeycomb structure alloy material with a preset shape is obtained. The alloy with specific materials is printed into the honeycomb structure alloy material with exact one step according to pore shapes, dimensions and distribution of the preset honeycomb structure and through the combination of a laser selective melting 3D print method. In the laser selective melting 3D print method, the honeycomb geometrical shape, dimension and distribution can be freely designed, a larger specific area is achieved, and the maximization of the contact area of the honeycomb structure alloy material and tail gas can be reached as much as possible.

The invention discloses a preparation method of a NiCr / Al2O3 composite coating. The preparation method comprises the steps of firstly, mechanically mixing Ni-Cr alloy powder with Al2O3 powder, and conducting ultrasonic oscillation, so that NiCr / Al2O3 composite powder is obtained; and then, conducting plasma spraying, so that the NiCr / Al2O3 composite coating with the NiCr content ranging from 10% to 30% is synthesized. By means of the preparation method, bonding strength of an Al2O3 coating is improved, and the defect that corrosion resistance of an aluminum oxide coating is lost in a strong acid environment is overcome.

One embodiment of the present invention pertains to an electrode which is to be formed on a substrate consisting of a ceramic. The electrode is provided with: a matrix which consists of an Ni-Cr alloy (wherein the Cr content is 20 to 60 mass%) or an MCrAlY alloy (wherein M is Fe, Co, and / or Ni); and a dispersed phase which consists of an oxide mineral having a layer structure and which is dispersed in the matrix. In the cross section of the electrode, the area fraction of the dispersed phase is 40 to 80%. By virtue of such a configuration, the increase in the electric resistance of the electrode can be minimized even after the electrode has undergone heat cycles.