42results about How to "Has high temperature oxidation resistance" patented technology

The invention relates to ceramic coating used for a heating furnace. The ceramic coating comprises the following components: ceramic micro powder, an inorganic bonding agent and a linear thermal expansivity regulator. The invention also provides a method for preparing the ceramic coating for the heating furnace. The ceramic coating has the characteristics of having improved radiance and thermal shock resistance, being efficient and energy-saving, prolonging the service life of furnace linings and furnace tubes, improving temperature uniformity and the like, as defined below: (1) the energy consumption is reduced, the energy is saved by more than 3 percent and pollutant discharge is reduced; (2) the temperature uniformity in the heating furnace is improved: (3) the metallurgy stability of the furnace tube of the heating furnace is improved, the coking and scaling of the furnace tub are delayed, and the absorbing capacity of the furnace tube can be maximized; (4) the emissivity of the surface of the refractory lining layer can be maximized so as to increase the secondary radiation of radiant heat (energy) and increase the efficiency of the radiant section; and (5) the outer wall temperature and the exhaust gas temperature of the heating furnace can be reduced by more than 5 percent.

The invention discloses a PVD nanometer multiple-layer coating used for cutting stainless steel and a preparation method thereof. The specific manufacturing process is as follows: firstly, implementing the surface cleaning treatment on carbide base; secondly, adopting a multiple targets magnetic sputtering method to alternatively deposit the nanometer multiple-layer coating which takes TiN (Tix, Al1-x)N/(Tiy, Al1-y)N/(Tix, Al1-x)N as a modulation period on the rotating carbide base; adopting Ar2 as the sputtering gas. The flow of Ar is 180-300cm3/s, the partial pressure is 1.7-9.0'10<-1>Pa, the reaction gas is N2, and the total pressure is controlled through controlling the partial pressure of N2. The invention introduces TiAlN with high Al content and perfect high temperature oxidation resistance into a multiple-layer coating material system, improves the high temperature oxidation resistance and the hardness of the coating, enhances the toughness of the coating through the microstructure optimization design and enables the coating to obtain both the high temperature oxidation resistance and excellent mechanical properties. The nanometer multiple-layer coating prepared through the invention is provided with great application value in the stainless steel cutting process.

The invention discloses a corrosion-resistant neodymium-iron-boron permanent magnet material and a preparation method thereof. The corrosion-resistant neodymium-iron-boron permanent magnet material comprises the following components in percentage by weight: 20-26 percent of Nd, 5-6.5 percent of Pr, 1-4 percent of B, 0.05-0.065 percent of Ir, 0.05-0.065 percent of Os, 0.5-0.65 percent of Sc, 0.5-0.65 percent of Cu and the balance of Fe. The corrosion-resistant neodymium-iron-boron permanent magnet material disclosed by the invention is provided with uniform tissue and a robust structure, so that the corrosion resistance of the material can be enhanced, and the magnetic performance is improved. According to the preparation method of the corrosion-resistant neodymium-iron-boron permanent magnet material, raw materials of an alloy are directly produced by fully utilizing praseodymium and neodymium waste, a component mixture ratio is flexible, and the quality is controlled appropriately; and moreover, the cost can be reduced, a process is simple, and powder waste with high oxygen content is fully utilized.

The invention discloses high bending force resistant permanent magnet materials and a preparation method thereof. The magnet materials comprise, by weight, 22-30% neodymium, 4.4-6% praseodymium, 0.044-0.06% lanthanum, 2-5% boron, 0.044-0.06% molybdenum, 0.044-0.06% nickel, 0.044-0.06% rhenium, 0.044-0.06% scandium and the balance ferrum. The high bending force resistant permanent magnet materials are uniform in organization, strong in structure and capable of improving bending force resistant performance of the materials and magnetic performance. The preparation method of the magnet material takes full use of praseodymium-neodymium waste to directly produce raw materials used by alloy, composition proportion is flexible, quality is well controlled, cost is lowered, the process is simple and powder waste with high oxygen content is fully used.

The invention relates to a ZrN/Al₂(O_1-xN_x)₃ solidness nanometer multi-layer coating preparing method. It belongs to ceramic material technique field. It adopts direct current cathode control metallic Zr target and radio frequency cathode control Al₂O₃ target, gains ZrN and Al₂(O_1-xN_x)₃ layer by reaction sputtering under the mixture gas of Ar gas and N₂ gas, and gains ZrN/Al₂(O_1-xN_x)₃ nanometer multi-layer coating with periodic change component, high rigidity and oxidation resistance by adjusting each target sputtering frequency and basal piece rotating residence time. The rigidity of the formed coating is higher than 30GPa. And its high temperature oxidation resistance is over 1000 centigrade degree. As the nitride/oxide nanometer multi-layer coating manufacturing technique, the invention has high production efficiency, and can be used in coating industrial production.

The invention provides a magnetic material containing a nitrogen-boron composite phase. The magnetic material is high in residual magnetic flux density; the preparation method is simple in process, low in production cost and suitable for industrial production. The permanent magnet material comprises the following components in percentage by mass: 24-30% of Nd, 2.4-3.0% of Y, 3.6-4.5% of Eu, 1.2-1.5% of Ce, 1.2-1.5% of Tb, 2-4% of B, 0.2-0.6% of P, 0.12-0.3% of Ba, 0.45-0.60% of V and the balance of Fe, wherein the permanent magnet material also comprises 0.55-0.86% of N in percentage by mass.

The invention provides a rare earth permanent magnet material utilizing recycled waste materials. An alloy material is high in coercivity. The preparation method is simple in process, low in production cost and suitable for industrial production. The permanent magnet material comprises the following components in percentage by mass: 18-22% of Nd, 7.2-8.8% of Y, 3.6-4.4% of Eu, 3.6-4.4% of Dy, 2-6% of B, 0.1-0.5% of P, 0.15-0.20% of Ag, 0.45-0.60% of Ni, 0.01-0.04% of Si, 0.45-0.60% of Ti and the balance of Fe; the mass ratio of Nd to Y to Eu to Dy in the permanent magnet material is 10:4:2:2; and the permanent magnet material also comprises 0.045-0.060% of N in percentage by mass.

The invention provides a high-temperature nano radiation coating for a heating furnace and a preparation process thereof. The coating comprises radiation function powder particles, an inorganic adhesive and an expansion coefficient regulator. The preparation process comprises the following steps: preparing the radiation function powder particles, preparing the expansion coefficient regulator, synthesizing the inorganic adhesive, mixing the radiation function powder particles, the inorganic adhesive and the expansion coefficient regulator, and filtering and grinding the obtained mixture so as to obtain the high-temperature nano radiation coating for the heating furnace. The high-temperature-resistant nano radiation coating disclosed by the invention has the characteristics of capability of increasing the radiance and the thermal shock stability, energy conservation and environmental friendliness, corrosion resistance, and capability of prolonging the service life of the heating furnace and raising the temperature uniformity, and the like. The technical indexes of the products provided by the invention are as follows: a temperature of 1800 DEG C can be resisted, the radiance epsilon is greater than or equal to 0.92, the thermal shock resistance (1300 DEG C) is greater than or equal to 5 times, the thickness of the coating is 0.1-0.2 mm, and the service life is greater than or equal to 6 years.

The invention provides a heat-resistant neodymium iron boron material and a preparation method thereof. The material not only has good magnetic properties, but also has high heat resistance. The preparation method has a simple process and a low production cost, thus being suitable for industrialized production. The heat-resistant neodymium iron boron material comprises the following components by weight: 21-24% of Nd, 7-8% of Pr, 1-2% of B, 0.07-0.08% of Ir, 0.07-0.08% of Rh, 0.7-0.8% of Sc, and the rest Fe.

The invention discloses a functional material and a preparation method. The functional material is blended by components in percentage by mass as follows: 34%-36% of Nd, 0.01%-0.15% of Nb, 0.01%-0.15% of Gd, 0.01%-0.15% of Ti, 0.01%-0.15% of Ni, 1%-4% of Bi, 1%-4% of Dy, 0.01%-0.15% of Cr, 4%-7% of B and the balance of Fe. The functional material has uniform tissue and strong structure, the corrosion resistance of the material can be improved, and the magnetism is improved. The permanent magnet material has good stability and practicability and can be widely applied to various fields such as electronic devices, aerospace engineering, computer equipment, magnetic separators, communication equipment, medical equipment, electric bicycles, electronic toys and the like.

The invention discloses a ceramic paint which is composed of following raw materials including 20-50 parts of ceramic fiber, 50-80 parts of silicon micro-powder, 60-95 parts of hollow glass microbeads, 200-250 parts of kaolin, 6-8 parts of di-(2-ethylhexyl) phthalate, 10-12 parts of glycerol, 2-3 parts of dimethylbenzene, 5-8 parts of epoxy resin, 6-9 parts of sodium hexametaphosphate, 12-15 parts of sodium hydroxide, 5-10 parts of trisodium phosphate, 3-10 parts of sodium carboxymethylcellulose, 2-5 parts of hydroxyethyl cellulose, 5-10 parts of hydroxypropyl methyl cellulose, 3-10 parts of titanium carbide, 5-10 parts of titanium dioxide, 3-5 parts of zirconium nitride, 6-10 parts of titanium hydride, 5-8 parts of sodium carbonate, 8-15 parts of calcium carbonate, 12-15 parts of silicone oil, 12-15 parts of polydimethylsiloxane, 10-15 parts of carbon black, 15-20 parts of paraffin, 12-15 parts of graphene, 5-10 parts of magnesium nitride, 5-10 parts of magnesium oxide, 3-6 parts of silicon oxide, 3-8 parts of nano silicon dioxide and 300-350 parts of pure water. In the ceramic paint, the raw materials are reasonably blended. The paint has a high-temperature anti-oxidation property and a thermal shock resistant property when being sprayed on or brushed on a lining layer.

The invention provides a composite waste-material-recycled rare earth magnetic material and a preparation method therefor. The alloy material has relatively high coercivity. The preparation method is simple in process, low in production cost, and suitable for realizing industrial production. The material comprises the following components based on mass percentage: 30-35% of Nd, 0.6-0.7% of Y, 1.2-1.4% of Ce, 0.6-0.7% of La, 1.2-1.4% of Pr, 0.3-0.35% of Gd, 0.6-0.7% of Sm, 0.6-0.7% of Co, 2-6% of B, 1.25-1.86% of N, 0.3-0.35% of Hf, 0.3-0.35% of Be and the balance of Fe; and the 1.25-1.86% of N based on mass percentage is included in the material.

The invention provides a permanent magnet material containing multiple rare earth phases and a preparation method. The permanent magnet material is high in magnetic energy product; the preparation method is simple in process, low in production cost and suitable for industrial production. The permanent magnet material containing the multiple rare earth phases comprises the following components in percentage by mass: 15-20% of Nd, 3-4% of Y, 4.5-6% of La, 6.0-8.0% of Ce, 3-4% of Pr, 0.15-0.20% of Pd, 0.3-0.4% of Sm, 2-5% of B, 0.45-0.60% of Co, 0.01-0.04% of Mn, 0.01-0.04% of Mo and the balance of Fe; the mass ratio of Pd to Co in the permanent magnet material is 1:3; the mass ratio of Nd to Y to La to Ce to Pr to Pd to Sm is 10:2:3:4:2:0.1:0.2; and the permanent magnet material also comprises 0.15-0.55% of N in percentage by mass.

The invention discloses a ceramic coating capable of resisting high-temperature corrosion for protecting a hanging part in a tin bath of float glass and a preparation method thereof. The preparation method comprises: dispersing SiO2, FeO, TiO2, Cr2O3, NiO, CoO and alkali metal compounds in water to obtain slurry with a solid content of 50-70%, grinding the slurry with a ball milling method to obtain an abrasive, then applying the abrasive on the cleaned surface of the hanging part and then sintering the surface of the hanging part and the coating. The resulting high-temperature ceramic coating has high-temperature anti-oxidation capacity and can also effectively improve the corrosion resistance of the surface of a Ni-Cr high-temperature alloy; and in addition, the ceramic coating can act as a heat barrier coating, forms effective protection on the hanging part in the tin bath of the float glass, and has important practical significance in prolonging the service life of the hanging part in the tin bath of the float glass.

The invention provides a waste-material-recycled multi-phase permanent magnet material and a preparation method therefor. The permanent magnet material has relatively high maximum magnetic energy product performance and coercivity. The preparation method is simple in process, low in production cost, and suitable for realizing industrial production. The permanent magnet material comprises the following components based on mass percentage: 25-30% of Nd, 2.5-3.0% of Y, 2.5-3.0% of Ce, 0.25-0.30% of Tb, 0.25-0.30% of Eu, 0.25-0.30% of La, 0.25-0.30% of Pr, 2-4% of B, 1.0-1.2% of N, 0.25-0.30% of V, 2.1-2.5% of W and the balance of Fe; and the 1.0-1.2% of N based on mass percentage is included in the material.