33results about How to "Large coating thickness" patented technology

In a method for coating workpieces with a coating material by a gas phase diffusion coating process, the coating material is conveyed in the form of a metal halide compound from a coating material source (9A, 9B, 9C) to the workpiece (7) by means of a metal halide gas circulation flow (F). The gas circulation flow (F) is physically induced due to convection by establishing a temperature gradient between the workpiece (7) and the coating material source (9A, 9B, 9C), and is reinforced by the chemical reactions taking place. An apparatus for carrying out a gas phase diffusion process includes a reaction vessel (3) enclosing a reaction chamber (1) in which the workpiece (7) is arranged. The apparatus further includes a metal halide generator (9A, 9B, 9C) arranged in the reaction chamber (1), and a heater (5) as well as a cooling device (6) and a thermal conduction arrangement (8) for establishing a temperature gradient between the workpiece (7) and the metal halide generator (9A, 9B, 9C). The method and apparatus produce a diffusion coating having a uniform thickness and a high quality smooth surface, even on large workpiece surfaces.

The invention discloses a method for preparing a reignition turbine first-stage work bladetip wear-resistant coating, which comprises the following steps of: (1) scanning the edge of the end face of the bladetip by using an infrared scanning device of laser coating equipment to enable a scanning track program control program to record the position of a scanned point; and (2) starting a laser generator of the laser coating equipment, transferring alloy powder to the end face of the bladetip under the protection of inert gases, and melting the alloy powder with laser beams. The matrix material of the reignition turbine first-stage work blade is a nickel-based cast high-temperature alloy K488 and the alloy powder is Co-based self-fusing alloy powder. The method for preparing the coating improves the high-temperature wear resistance of the coating, also improves automatic control level and production efficiency of the coating preparation and guarantees the stability of the quality of the product.

The invention relates to a method for coating the walls of a cavity, in particular the cylinder bore of an engine block. In this method, a coating is applied to the cavity walls with a coating gun. In addition, a measuring device is used to measure the cavity diameter. According to the invention, the method is characterized in that at least a plurality of diameter values ​​of the first cavity are measured at different heights of the first cavity with a measuring device, and that the wall of the first cavity or the second cavity is measured with a coating spray gun. A variable-thickness coating is provided, the thickness of which depends on the determined diameter value. In addition, the present invention also describes a corresponding coating system.

The invention relates to the technical field of electric heating appliances, and discloses a non-stick coating, a preparation method thereof, pots and cooking equipment. The method comprises: (1) pretreating the substrate; (2) preheating the surface of the substrate obtained in step (1); (3) mixing silicon carbide powder and fluororesin powder to obtain a powder mixture, and The powder mixture is plasma sprayed to form a non-stick coating on the substrate surface. The non-stick coating of the present invention is gray-black, stain-resistant, and has high surface hardness, high coating bonding force, good scratch resistance, good corrosion resistance, good wettability, good heat transfer performance, and long service life Etc.

The invention discloses an electron beam radiation curing coating for metal heavy anti-corrosion. The coating is prepared from, by mass, 50%-80% of oligomer, 0.1-0.5% of reactive diluent, 1-10% of functional filler, 5-20% of antirust dyestuff and 5-15% of auxiliary filler, and the total mass percentage of the components is 100%. The curing coating for metal heavy anti-corrosion is cured by electron beam radiation, has the advantages of high efficiency and energy conservation, environment friendship and convenient operation, cured depth of the coating is high, thickness is big, and the adhesive force between the coating and the substrate is strong. A conductive carbon material is doped in the curable coating, thus the problem of metal heavy anti-corrosion is solved while electron beam energy absorption is avoided, and it is guaranteed that cured efficiency is not affected. The electron beam radiation curing coating for metal heavy anti-corrosion has excellent wear-resistance and corrosion-resistance, can be applied to the field of metal heavy anti-corrosion anti-corrosion, and is particularly applicable to the field of maritime work heavy anti-corrosion.

The invention discloses a corrosion-resistant and wear-resistant coating with a gradient combination structure and a preparation method thereof, which is to clad alloy powder on the surface of a pretreated substrate by plasma cladding to obtain an alloy layer with a large thickness dendritic structure. Afterwards, the surface of the alloy layer is remelted by laser without feeding powder, and the growth of thick dendrites is fused to obtain a fine equiaxed crystal structure. After the plasma cladding of the present invention, a thick dendrite structure is formed. The dendrite has a peg effect on the substrate, and has a supporting effect on the subsequent laser high-speed cladding layer, which ensures the large-thickness coating, strengthens the combination with the substrate, and melts with high entropy. The alloy powder is fully and evenly mixed. The subsequent laser remelting can melt the thick dendrites and obtain fine and dense equiaxed crystals, which can block the propagation of corrosive media and improve corrosion resistance.

The invention relates to the technical field of electric heating appliances, and discloses a non-stick coating, a preparation method thereof, pots and cooking equipment. The method comprises: (1) pretreating the substrate; (2) preheating the surface of the substrate obtained in step (1); (3) mixing metal oxide powder and fluororesin powder to obtain a powder mixture, and The powder mixture is thermally sprayed to form a non-stick coating on the surface of the substrate, and the metal oxide powder includes aluminum oxide powder and tetravalent metal oxide ceramic powder. The non-stick coating of the invention has the advantages of high surface hardness, high coating binding force, good scratch resistance, good corrosion resistance, good wettability, long service life and the like.

The invention provides a polyurethane prepolymer, polyurea material and preparation methods and applications thereof and belongs to the field of high-polymer materials. The preparation method of the polyurethane prepolymer comprises mixing polyopolyols and micro-branched polyester polyols in a reaction container, eliminating water under vacuum, and then adding toluene diisocynate and solvent into the reaction container for reaction at 70-80 DEG C for 3-4 h. The preparation method of the polyurea material comprises mixing diamine, antioxygen and mixture solvent to obtain a mixture and mixing the polyurethane prepolymer with the mixture at a weight ratio of 100:23-45. The polyurea material is high filling amount of iron-based powder, large in coating thickness, high in adhesion force, good in flexibility and high in impact resistance.

The invention relates to a method for preparing a carbon material surface ceramic coat, which comprises the following steps of: uniformly coating the prepared slurry on a carbon material matrix with the coating thickness of 0.8 to 1.2 millimeters, and drying the carbon material matrix to form a uniform coating material on the carbon material matrix; performing TIG deposition on the coating material coated on the carbon material matrix under the process parameters that the current is 120 to 160A, the electric arc voltage is 15 to 20V, the deposition speed is 6 to 8m / h and the argon flow is 5-8L / min so as to melt the coating material under the action of electric arc heat, and cooling the carbon material matrix to obtain a ceramic layer tightly combined with the matrix on the carbon materialmatrix. The method has the advantages of simple operation, high efficiency, low cost, attractive coat and metallurgical combination with the matrix. The prepared ceramic coat has controllable component, high thickness, oxidization resistance and ablation resistance.

The invention relates to a method for strengthening a surface of a metal roller by adopting an electro-spark deposition method and a plasma fusion covering method. The metal roller is processed in an electro-spark deposition way and a plasma fusion covering way, so that the problems for improving the hardness, abrasion resistance and impact resistance of the surface of the roller and prolonging the service life of the metal roller can be effectively solved. The method comprises the following steps: performing fusion covering of alloy powder onto the surface of the roller by utilizing non-oxidized plasma beam to form a molten alloy coating, depositing WC ceramic hard alloy by utilizing the electro-spark deposition way on the basis of the plasma fusion covering coating to form a composite coating integrating the electro-spark deposition and plasma fusion covering. The method is simple and practical, the electro-spark deposition and the plasma fusion covering composite coating is firmly combined with a substrate, the thickness of the coating is large, so that the surface hardness, compactness, heat resistance and abrasion resistance of the roller are good, and the service life is long; by adopting the composite coating, the price of the iron-nickel alloy powder is low, the thickness of the coating is large, the abrasion resistance and corrosion resistance are good, the hardness and strength are high, and the abrasion and heat resistance is excellent.

The invention discloses a method for preparing a TiCN coating layer in situ on the surface of titanium alloy. The method comprises the following steps: mechanically cleaning the surface of a titaniumalloy workpiece until the surface roughness of the titanium alloy workpiece is smaller than 3.2 microns, and uniformly smearing the titanium alloy workpiece with a layer of vaseline paste; and (2) putting the region, smeared with the vaseline paste, of the titanium alloy workpiece below a pulse YAG laser under the protection of nitrogen atmosphere, switching on a power supply of the pulse YAG laser to realize laser irradiation on the region, smeared with the vaseline paste, of the titanium alloy workpiece, and finally cleaning and airing, so as to obtain the TiCN coating layer on the surface of the titanium alloy workpiece. The method is simple, the thickness of the TiCN coating layer is mainly controlled according to the thickness of the smeared vaseline paste and the laser power, and thevaseline paste is taken as a carbon source, so that the cost is low, a process microcell environment can be isolated during the reaction on the surface, and the surface oxidation of the titanium alloy can be prevented.

The invention discloses a method for reinforcing a surface of a hot-extrusion die through cementation compounding. The method comprises the following steps: polishing and cleaning the surface of a die subjected to nitriding treatment, and performing CrAlN coating processing in arc ion plating equipment; with a rectangular Ti target as a Ti source of a bottom layer and a transition layer, controlling the sputtering rate of the rectangular Ti target through the current of the arc power of the rectangular target; with a circular CrAl target as the Cr and Al element source of a CrAlN coating, controlling the sputtering rate of the circular CrAl target through the current of the arc power of the circular CrAl target; ionizing high-purity Ar and N2 so as to be combined with Cr and Al elements, and depositing on the nitriding layer of the die to form the CrAlN coating. The method disclosed by the invention is applicable to the field of hot-extrusion dies in high-temperature and heavy-load harsh service conditions.