66results about How to "Increase wetting angle" patented technology

The invention discloses an electroslag remelting quaternary slag system for preparing high-purity stainless steel. The electroslag remelting quaternary slag system is characterized by comprising the following compositions in percentage by weight: 50 to 65 percent of CaF2, 20 to 25 percent of Al2O3, 10 to 25 percent of CaO and 0 to 5 percent of MgO. The quaternary slag system is adopted for electroslag remelting, can effectively reduce the non-metallic inclusion content of the steel and improves the purity of the steel under the condition of non-protective atmosphere and has the characteristics of little investment, low use cost and easy realization.

The invention discloses a product containing an NiCrN ternary coating. On the product, a Cr layer is used as a bottom layer, an NiCrN layer is used as a transition layer, and a plurality of NiCrN-CrN composite coatings are deposited on the NiCrN transition layer, so that the thickness of the composite coating reaches 2-5 mu m. By adopting the multilayer gradient design and nitriding technique before filming, the invention greatly enhances the film-base bonding strength of the coating. The critical load of the gradient coating prepared by the invention in a scarification test is up to 75N which is much higher than that of a related coating prepared by any other method or technique; and the hardness of the product containing an NiCrN ternary coating can reach 2780HV. The invention greatly enhances the shock resistance, abrasion resistance, friction resistance and heat stability on the surface of a mold or cutter, and greatly lowers the friction factor and weight loss rate by abrasion. The NiCrN ternary coating greatly enhances the wetting angle of mold steel for organic solvents, which indicates that the coating can greatly improve the demoldability of the mold.

The invention discloses iron-based composite powder high in chromium content for laser cladding. The iron-based composite powder high in chromium content for laser cladding is composed of the chemical compound of Cr3C2, Cr and Fe, Ni, Mo, Si and B. The iron-based composite powder high in chromium content for laser cladding comprises, by mass, 38%-40% of Cr, 4.2%-4.5% of C, 3%-5% of Ni, 0.05%-0.08% of Mo, 0.8%-1.02% of Si, 1.2%-1.78% of B and the balance Fe. The particle size of the iron-based composite powder is between +140 meshes and -325 meshes. The iron-based composite powder is high in carbon content and chromium content, the hardness of a coating can be effectively improved, requirements of the laser cladding technology of iron-based base materials such as carbon steel and stainless steel can be met, a cladding layer of a sample of the iron-based composite powder is free of cracks and macroscopic pores, all the components are distributed evenly, the hardness of the iron-based composite powder can reach HV0.21000 and is five times that of a base body, the corrosion resistance of the iron-based composite powder cladding layer is improved due to the high chromium content, and the iron-based composite powder is suitable for normal temperature, high temperature, abrasion resistance and corrosion resistance working conditions.

The invention discloses ladle bottom argon blowing air brick for smelting high-purity high manganese steel. The air brick is prepared from the following materials: forsterite sand, fused magnesia, corundum, sodium silicate, sodium permanganate, an explosion-proof admixture, a polycarboxylate dispersion water reducing agent and water. Uniformly-distributed tiny pores can be formed in the air brickdisclosed by the invention, and the permeation volume is 1.5 times or more than 1.5 times of the permeation volumes of slit and diffuse air bricks; argon is permeated in molten steel through the plurality of pores, so that the purification rate of the molten steel is obviously increased, and the contents of oxygen and hydrogen in the molten steel are reduced; the problems that a small number of straight thick holes are caused by slag-clearing iron oxygen burning, the argon intensively passes through the molten steel and quickly escapes from the liquid level and the like are solved; the purification rate of the molten steel is obviously increased.

The invention discloses a product containing a CrNiTiAlN quinary coating. The product takes a Cr layer as a bottom layer and takes an NiCrN layer as a transition layer, wherein a plurality of NiCrN-CrN-AlN-TiN composite coatings with the thickness are deposited on the NiCrN layer, and the thickness of the composite coatings can achieve 2-5 mu m; and according to the product disclosed by the invention, a multi-layer gradient design and a nitriding process before film plating are adopted, so that a coating-substrate bonding strength is greatly improved, and the critical load of the prepared gradient coatings in a scratch test is as high as 68N, which is relatively higher than related plated layers prepared by other methods and processes. The hardness of the product containing the CrNiTiAlN quinary coating can achieve 2880HV; the anti-impact, wear-resistant and anti-friction performances and the thermal stability of the surfaces of a mold and a cutter are greatly improved, and the friction coefficient and the rate of weight loss caused by wear are greatly reduced; and the wetting angle of mold steel to an organic solvent is improved, thereby showing that the coating can be used for greatly improving the demolding performance of the mold.

The invention relates to automatic flow venting rapid mending material for the refined ladle venting brick. The invention is characterized in that the material consists of the ingredients according to the weight proportion as follows: Al2O3 of 80 to 95, wedding agent of 3 to 15, detonation suppression of 0.1 to 0.5 and preservative agent of 1 to 5. The invention has the advantages of rapid sintering, good venting, no seeping steel, long service life and easy operation.

The invention belongs to the technical field of refractories for steel smelting furnaces, and in particular relates to a zirconium composite high-performance electrofused magnesium-calcium zirconium brick and a manufacturing method thereof; the zirconium composite high-performance electrofused magnesium-calcium zirconium brick comprises 5-10% of electrofused magnesium-calcium zirconium sand with a partical size of 5-8mm, 20-35% of electrofused magnesium-calcium zirconium sand with a partical size of 2-5mm, 20-30% of electrofused magnesium-calcium zirconium sand with a partical size of 2-0.074mm, 10-15% of electrofused magnesium-calcium zirconium sand fine powder with a partical size of 0.074mm or less, 1-5% of electrofused magnesium sand with a partical size of 5-8mm, 1-10% of electrofused magnesium sand with a partical size of 2-5mm, 1-5% of electrofused magnesium sand with a partical size of 2-0.074mm, 5-10% of electrofused magnesium sand fine powder with a partical size of 0.074mm or less, 5-10% of electrofused magnesium sand super-fine powder with a partical size of 0.037mm or less, 0.5-1.2% of calcium stabilized zirconia with a partical size of 0.5mm or less, 0.5-2% of metal calcium powder with a partical size of 0.088mm or less, 0.1-0.5% of silica fume with a partical size of 0.003mm or less and 2-5% of a binder. The method can obviously improve the physical and chemical performance indexes of the magnesium-calcium zirconium brick, anti-penetration, anti-erosion, anti-erosion and anti-spalling and other use performances of the magnesium-calcium zirconium brick can be improved, and most importantly, the magnesium-calcium zirconium brick can meet the requirements of current smelting conditions.

The invention belongs to the technical field of veterinary chemical medicinal preparations, and particularly relates to a dimetridazole soluble powder and a preparation method thereof. The dimetridazole soluble powder is prepared from the following components in parts by weight: 18-22 parts of dimetridazole and 10-15 parts of hydrophilic carrier, and the balance of glucosum anhydricum or lactose anhydrous supplemented to 100 percent, wherein the hydrophilic carrier is one or more of PVP K30, poloxamer 188 and sodium lauryl sulfate. According to the dimetridazole soluble powder, the specific surface area of an insoluble medicine can be improved, and the wetting property can be increased, so that solubility of dimetridazole can be improved, the dissolving time is shortened, and the aim of clinical drinking water administration can be achieved. The dimetridazole has good bioavailability and good medicinal effect.

The invention relates to a castable for a main trough of a middle-sized blast furnace and belongs to the field of refractory castables. The castable is prepared from the following components in parts by weight: 5 to 8 parts of 8-5mm tabular corundum, 15 to 20 parts of 5-3mm chromium nitride, 10 to 15 parts of 3-1mm sillimanite, 8 to 15 parts of 1-0mm calcium chromate, 2 to 5 parts of slightly viscous clay powder, 3 to 7 parts of cobaltous oxide aluminum powder, 5 to 10 parts of cutting powder, 3 to 8 parts of amorphous graphite powder, 1 to 2 parts of composite carbon powder, 0 to 3 parts of molybdenum trioxide powder, 3 to 5 parts of alumina micro powder, 1 to 5 parts of magnesium oxide iron powder, 1 to 3 parts of rho aluminium oxide and 0 to 5 parts of electric smelting pure calcium aluminate cement; it is assumed that the sum of the total weight parts of main ingredients is 100%, then additives comprise the following components in part by weight: 0.1 to 0.2 part of calcium lignosulphonate, 0.01 to 0.05 part of nanometer potato powder, 0.01 part of malic acid and 0.1 part of C12H14N4O5S2. The main trough of the blast furnace prepared with the castable has the advantages of good thermal shock resistance, strong erosion resistance, a big iron influx and a long service life.

The invention discloses a carbon nano-reinforced aluminum-based conductor material and a preparation method. Nano-silicon dioxide chemically grows on the surface of graphene oxide, reduced graphene oxide@silicon dioxide carbon nano-powder is prepared in a high-temperature sintering process, the mixed powder is blown into a melt through inert gas, and stirring, purification and casting are prepared. Silicon dioxide nano-particles grow on the surface of graphene, so that an agglomeration reaction in a reduction process for graphene oxide is avoided, a wetting angle of graphene and the aluminum melt is reduced, and graphene is prevented from floating onto the surface of the aluminum melt and into the melt to be agglomerated in an adding process. A graphene@silicon dioxide reinforcement is high in chemical stability, and improves the heat stability of an aluminum-based composite material with an aluminum- zirconium phase. According to the carbon nano-reinforced aluminum-based conductor material and the preparation method, the problem of insufficient strength and heat resistance of the aluminum-based composite material for limiting a conductor in an application process is solved. The compactness of the aluminum-based composite material produced by a casting method reaches 100%, the strength is increased by 25% and above, and the heat resistance is improved by 20-50 DEG C and above.

The invention relates to an alumina-magnesite carbon brick for a 300t steel ladle impact region. The brick is obtained by using brown aluminum oxide, fused magnesite, dicalcium high-purity magnesia, crystalline flake graphite, carbon black and metal aluminum powder as raw materials, adding resin powder and phenolic resin into the raw materials, performing uniform mixing and performing baking afterpressing shaping, wherein the brown aluminum oxide and dicalcium high-purity magnesia have the independent particle diameter grading respectively; the brown aluminum oxide has the four stages of grading which are respectively 5 to 3 mm, 3 to 1 mm, 1 to 0 mm and at most 0.074 mm; the dicalcium high-purity magnesia has two stages of grading which are respectively 1 to 0 mm and at most 0.074 mm. Thebrown aluminum oxide and the dicalcium high-purity magnesia at different particle diameter grading are used as main bodies; the fused magnesite, the medical aluminum powder, the crystalline flake graphite and the carbon black are used as auxiliary materials and are mixed; then, the resin powder and the phenolic resin are added for pressing; drying is performed at a certain process curve, so thatthe pore rate is effectively reduced; the volume density and the pressure-resistant intensity of the alumina-magnesite carbon brick are improved; the service life is further prolonged.

The invention discloses a preparation method of an iron runner sialon casting body. The method comprises the following step: embedding a pipe easy to burn out in an iron runner casting body; and forming a pipe inlet and a pipe outlet in the wall of an iron runner. When the iron runner is used, the pipe easy to burn out is burnt out to form a channel, nitrogen is fed in the channel; and when the flows of the inlet and the outlet of the nitrogen channel are the same, the outlet of the channel is closed and the feeding of the nitrogen is stopped; and a filling material is pressed into the channel. The air-cooled iron runner sialon casting body prepared by using the method is high in cooling efficiency, so that the service life of the iron runner is further prolonged. The integrated iron runner sialon casting body can be used for improving the whole thermal state strength of the iron runner by dozens of times; and the iron runner material contains nitrides, so that a wetting angle of the iron runner material to slag iron is enlarged. Thus, the slag erosion resistance and the penetration resistance of the iron runner are greatly improved. Therefore, the service life of the iron runner is prolonged. As a result, the cost of an enterprise is reduced; and the generation of industrial wastes and the waste of fire-resistant raw material resources are reduced, namely, the environmental-friendly effect is achieved.

The invention relates to a castable for a main iron trough. The castable comprises a main material and an additive, wherein the main material comprises components in parts by weight as follows: 5-8 parts of 10-5mm magnesium titanate, 15-20 parts of 5-3 mm chromium nitride, 10-15 parts of 3-1 mm sillimanite, 8-15 parts of 1-0 mm calcium chromite, 2-5 parts of clay powder, 3-7 parts of cobaltous oxide aluminum powder, 5-10 parts of cutting powder, 3-8 parts of amorphous graphite powder, 1-2 parts of composite carbon powder, 0-3 parts of molybdenum trioxide powder, 3-5 parts of alumina micropowder, 1-5 parts of magnesium oxide iron powder, 1-3 parts of rho aluminum oxide and 1-5 parts of fused calcium aluminate cement; the additive comprises, in parts by weight, 0.1-0.2 parts of calcium lignosulfonate, 0.01-0.05 parts of nano potato powder, 0.01 parts of malic acid and 0.1 parts of C12H14N4O5S2 on the basis that the parts of the main material by weight adds up to 100%. The blast furnace iron trough prepared with the castable has the characteristics of good thermal shock resistance, high corrosion resistance, large iron influx and long service life.

The invention provides a preparation method of hydrophobic micro-arc oxidation bioactive coating with titanium surface, which relates to the field of titanium surface modification and aims at solving the problem that when soaked in a body liquid, a micro-arc oxidation coating prepared by the traditional method is easy to corrode due to a small wetting angle, and therefore, the biological activity of the coating loses effectiveness. The preparation method provided by the invention comprises the steps of: 1, polishing and washing the surface of a titanium test sample; 2, preparing a micro-arc oxidation electrolyte; 3, carrying out micro-arc oxidation for 5-15 minutes under the conditions that the temperature of the electrolyte is 10 DEG C-60 DEG C, the impulse voltage is 250-550 V, the working efficiency is 200-1000Hz, and the duty ratio is 4-20 percent; and 4, washing and drying to obtain the coating. The preparation method provided by the invention is simple in technology, short in period, low in cost and is easy for large-scale generation of the coating. The preparation method is applied to the field of medical equipment.

The invention relates to castable. The castable is prepared from a main material and additives. The main material is prepared from, by weight, 5-8 parts of 8-5 mm barium aluminate, 15-20 parts of 5-3 mm chromium mononitride, 10-15 parts of 3-1 mm sillimanite, 8-15 parts of 1-0 mm calcium chromite, 2-5 parts of clay-like powder, 3-7 parts of cobalt aluminum oxide powder, 5-10 parts of cutting powder, 3-8 parts of amorphous graphite, 1-2 parts of composite powdered carbon, 0-3 parts of molybdenum trioxide powder, 3-5 parts of alumina micro powder, 1-5 parts of magnesium oxide iron powder, 1-3 parts of rho aluminum oxide and 0-5 parts of electric-smelted pure calcium aluminate cement. With the main material accounting for 100% by weight in total, the additives are prepared from, by weight, 0.1-0.2 part of calcium lignosulfonate, 0.01-0.05 part of nanometer dried potato powder, 0.01 part of malic acid and 0.01 part of C12H14N4O5S2. A blast furnace iron runner made of the castable has the advantages of being good in thermal shock resistance, high in corrosion resisting performance, large in iron exchanging amount and long in service life.

Provided is a process for preparing pigment red 57: 1. Through process improvement and adding of 2-aminophenol-4-sulfonic acid, 1-amino-2-naphthol-4-sulfonic acid or 3-amino-4-methoxybenzenesulfonic acid as a second coupling component, inter-particle force is attenuated, and particle size and color light are changed. Meanwhile, triethanolamine dodecylbenzene sulfonate, 4-hydroxybutyrate hydrazineand 4-hydroxybutyl acrylate are selected as a modifying substance and a dispersing agent to enhance the coloring power, effectively control the pigment crystal growth and improve the flowability. Microwave drying is adopted to improve the drying efficiency and avoid crystal form dehydration conversion. Airflow mill drying is adopted to reduce the average particle size of the pigment and increase the coloring strength. The pigment prepared by the technology effectively solves the problems of poor flowability, low coloring strength and the like of the traditional pigment.

The invention relates to a castable for a 2000m<3> blast furnace supporting iron runner. The castable comprises a main material and an additive, wherein the main material comprises the following components in parts by weight: 5-8 parts of 5mm-8mm zirconium mullite, 15-20 parts of 3mm-5mm chromium nitride, 10-15 parts of 1mm-3mm sillimanite, 8-15 parts of 0-1mm calcium chromate, 2-5 parts of clay powder, 3-7 parts of cobalt aluminum oxide powder, 5-10 parts of cutting powder, 3-8 parts of amorphous graphite powder, 1-2 parts of composite carbon powder, 0-3 parts of molybdenum trioxide powder, 3-5 parts of alumina micro powder, 1-5 parts of magnesium iron oxide powder, 1-3 parts of rho alumina and 0-5 parts of electric-fused pure calcium aluminate cement; the additive comprises the following components in parts by weight of 100% of the main material: 0.1-0.2 part of calcium lignosulphonate, 0.01-0.05 part of nano potato powder, 0.01 part of malic acid and 0.1 part of C12H14N4O5S2. The blast furnace supporting iron runner prepared from the castable has the characteristics of good thermal shock resistance, strong erosion resistance, high iron influx and long service life.

The invention relates to a casting material for a 800m<3> blast-furnace branch iron trough. The casting material comprises a main material and an additive, wherein the main material comprises the following components in parts by weight: 5-8 parts of 8-5mm magnesium silicate, 15-20 parts of 5-3mm chromium nitride, 10-15 parts of 3-1mm sillimanite, 8-15 parts of 1-0mm calcium chromite, 2-5 parts of slightly-viscous clay powder, 3-7 parts of cobalt-aluminum oxide powder, 5-10 parts of cutting powder, 3-8 parts of amorphous graphite powder, 1-2 parts of compound carbon powder, 0-3 parts of molybdenum trioxide powder, 3-5 parts of aluminium oxide micropowder, 1-5 parts of magnesium-iron oxide powder, 1-3 parts of Rho aluminium oxide and 0-5 parts of electrically-smelted pure calcium aluminate cement; the additive comprises the following components in parts by weight according to the total weight part 100% of the main material: 0.1-0.2 part of calcium lignosulphonate, 0.01-0.05 part of nano potato powder, 0.01 part of malic acid and 0.1 part of C12H14N4O5S2. The blast-furnace iron trough prepared by the casting material has the characteristics of good thermal shock resistance, strong anti-erosion performance, large iron influx and long service life.