709 results about "Nichrome" patented technology

An RF-only multipole includes a spiral resistive path formed around each multipole rod body. RF voltages are applied to the rod body and resistive path, and DC voltages are applied to the resistive path, to create a radially confining RF field and an axial DC field that assists in propelling ions through the multipole interior along the longitudinal axis thereof. In one implementation, the resistive path takes the form of a wire of resistive material, such as nichrome, which is laid down in the groove defined between threads formed on the rod body. The RF-only multipole of the invention avoids the need to use auxiliary rods or similar supplemental structures to generate the axial DC field.

The present invention belongs to the technical field of air sterilizing and purification and in particular relates to a plasma air sterilizing and purifying device and an air sterilizing and purifying method. The plasma air sterilizing and purifying device comprises a plasma reactor, a pulse power supply, a fan component, a control device, a power adaptor, and a housing case, wherein the reactor is provided with positive electrodes formed by several nickel-chromium alloy wires or nickel-chromium alloy belts, and the two ends of each positive electrodes are fixed in the corresponding grooves on the micro-discharge preventive conductor rail; and a pulse power supply has a digital control circuit with an oscillator, an error amplifier and a PWM comparator inside which converts signals into a digital control current to control the width of the high-voltage pulse.

The present invention discloses compound high speed steel roll and its making process. The compound high speed steel roll consists of roll body and roll core compounded through central casting. The roll body is made of high speed steel comprising chemically C 1.8-2.8 (in wt%, same as below), Mo 4.0-8.0, V 3.0-7.0, Nb 1.5-4.0, Cr 6.0-12.0, RE 0.1-0.25, Ti 0.15-0.40, N 0.08-0.20, K 0.06-0.18, Si<2.0, Mn<2.0, S<0.05 and P<0.05, except Fe and inevitable impurity. The roll core is made of high strength nodular cast iron comprising chemically C 3.2-3.6 (in wt%, same as below), Si 1.8-2.4, Mn 0.4-0.8, Ni 0.3-1.2, Cr 0.3-0.8, Mo 0.2-0.5, Mg 0.03-0.08, RE 0.05-0.14, P<0.08 and S<0.03, except Fe and inevitable impurity. The compound high speed steel roll has high wear resistance, simple making process and high production efficiency.

The invention discloses a multiple boride metal ceramic based on a high-entropy alloy adhesion agent and a preparation method thereof. According to the boride metal ceramic, high-entropy alloy serves as an adhesion phase, multiple boride serves as a hard phase, the high-entropy alloy adhesion phase is composed of at least four of iron, cobalt, nickel, chromium, aluminum, vanadium, titanium, copper, zirconium, molybdenum and manganese, and the content mole ratio of each element is between 5% and 35%. The multiple boride hard phase comprises W2M1B2 or/and Mo2M2B2, wherein M1 and M2 are at least one of Fe, Ni, Co and Cr. The preparation method of the multiple boride metal ceramic based on the high-entropy alloy adhesion agent comprises the steps of ball-milling mixing, forming and low-pressure sintering.

An etchant of the present invention includes an aqueous solution containing hydrochloric acid, nitric acid, and a cupric ion source. An etching method of the present invention includes bringing the etchant into contact with at least one metal selected from nickel, chromium, nickel-chromium alloys, and palladium. Another etching method of the present invention includes bringing a first etchant that includes an aqueous solution containing at least the following components A to C (A. hydrochloric acid; B. at least one compound selected from the following (a) to (c): (a) compounds with 7 or less carbon atoms, containing a sulfur atom(s) and at least one group selected from an amino group, an imino group, a carboxyl group, a carbonyl group, and a hydroxyl group; (b) thiazole; and (c) thiazole compounds; and C. a surfactant) into contact with a surface of the metal, and then bringing a second solution that includes an aqueous solution containing hydrochloric acid, nitric acid, and a cupric ion source into contact with the surface of the metal. According to the etchant and the etching methods of the present invention, it is possible to etch at least one metal selected from nickel, chromium, nickel-chromium alloys, and palladium quickly and suppress excessive dissolution of copper.

The invention provides a nickel-chromium-cobalt-molybdenum heat resisting alloy and a pipe manufacturing process thereof and belongs to the technical field of the heat-resisting alloys. The alloy comprises the following chemical components in percentage by weight: 21-23% of Cr, 0.05%-0.07% of C, less than or equal to 0.3% of Mn, 11-13% of Co, 6.0-9.0% of Mo, 0.3-0.5% of Ti, 0.8-1.3% of Al, 0.1-1.0% of W, 0.002-0.005% of B, 0.03-0.15% of Zr, 0.2-0.6% of Nb+V and 0.01-0.05% of Nb, less than or equal to 0.15% of Cu, less than 0.008% of P, less than 0.002% of S, less than or equal to 0.015% of N, 0.005-0.02% of Mg, less than or equal to 0.01% of Ca, less than or equal to 0.01% of As, less than or equal to 0.07% of Pb, less than or equal to 0.001% of Bi and the balance of nickel and inevitable impurity elements. The nickel-chromium-cobalt-molybdenum heat resisting alloy has the advantages that the room-temperature mechanical properties, the high-temperature mechanical properties, the low cycle fatigue properties and the durability of a large-diameter thick-wall boiler pipe produced from the nickel-chromium-cobalt-molybdenum heat resisting alloy are all over ASME standard requirements and the technical requirements of CCA617 alloys; the formulation of HAZ liquation cracks and stress relaxation cracks is greatly reduced, and the HAZ long term rupture strength and the tenacity after long term aging both are excellent.

The invention discloses martensite stainless steel and preparation method for flat strips of martensite stainless steel. The martensite stainless steel comprises following chemical components by weight percentage: C 0.02 to 0.06%, Si 0.3 to 0.5%, Mn 1.0 to 1.5%, Ni 8.5 to 9.0%, Cr 17.5 to 18.5%, Ti 0.4 to 0.6%, P no more than 0.009% and S no more than 0.009%, with the balance being Fe. The preparation method for flat strips of the martensite stainless steel comprises the following steps: a) weighing above-mentioned chemical components at desired weight percentage; b) carrying out vacuum induction melting; c) carrying out casting to obtain remelt electrode bars; d) carrying out electroslag remelting to obtain steel ingots; e) forging steel ingots into billets; f) processing billets into round strips; g) carrying out solid solution treatment; h) drawing treated blanks into wires; i) preparing flat strips. According to the invention, equivalents of nickel and chromium are strictly controlled, the ratio of C to Ti and alloy elements are optimized, EVR smelting is carried out and such alloying elements as C, Si, Mn and Ti are added, thereby enabling formation of a metastable austenite structure; a predeformed phase-changed martensite wire material is obtained by wire drawing; and the ultra high strength deformed flat strips of martensite stainless steel are obtained by flat strip rolling.

The invention relates to a composite roll for centrifugally casting high-chromium cast iron and a preparation method thereof, belonging to the technical field of the steel rolling. The composite roll comprises a roll external layer and a roll core. The chemical components of the materials of the roll external layer in terms of the percentage by weight are as below: 25-28 of alloy scrap iron of a high-nickel-chromium infinite chilled iron roll, 28-30 of carbon ferrochrome, 1.5-2.5 of mid-carbon ferromanganese, 2.5-3.5 of ferroboron, 0.5-0.8 of silicon-calcium-barium alloy, 0.2-0.4 of aluminum, 0.3-0.5 of ferrotitanium, 0.2-0.4 of rare earth ferrosilicon, 0.10-0.15 of zinc, 0.15-0.18 of magnesium and the balance of low-carbon waste steel sheet. The roll core is high-strength alloy cast iron or low-alloy ductile cast iron. The roll external layer and the roll core are formed through centrifugal composite casting. The roll has low production cost, contains a small number of impurities and has high degree of purity; the hardenability, the mechanical performance and the thermal fatigue of the roll can be improved; and the roll has long service life and low production cost.

The present invention includes an improved ejector sleeve (5) having thinner side-walls than prior sleeves. The sleeves generally include a ring (31) for mounting the sleeve, a central bore (42) for receiving a core pin (1), a tube portion extending from the ring to a tube end portion. The side-walls defining the tube end portion have a thickness of less than forty thousandths, and preferably thirty thousandths of an inch. Preferably, the coated ejector sleeve is provided in which a thin, lubricous coating of nickel, chromium or alloys of chromium or nickel is applied to at least a portion of the sleeve. The coating is applied in thickness of less than 0.0001 inch which improves the wear characteristics of the pins and sleeves as well as allowing the coated pins and sleeves to be stocked and used as nominal thickness parts.

The invention provides a high-boron high-speed steel roller material and a smelting process thereof. The smelting process of the high-boron high-speed steel roller material comprises the following steps: firstly, adopting Q235 waste steel, ferrotungsten, ferromolybdenum, ferrovanadium, high carbon ferro-chrome, metal copper, metal aluminum, calcium-silicon alloy, rare earth ferrosilicon magnesium alloy, ferrocolumbium, ferroboron, ferrosilicon, vanadium-nitrogen alloy, zirconium ferrosilicon and ferrotitanium as materials for smelting low-alloy high-speed molten steel in an electric furnace; then, adding the ferrovanadium and part of ferroboron to carry out alloying in a discharging process; finally, adding part of ferroboron and composite modificator in a casting ladle, adding the vanadium-nitrogen alloy, the zirconium ferrosilicon, the ferrosilicon and part of ferroboron in the casting process. The obtained casting piece has a little alloy elements, excellent abrasive resistance and good thermal fatigue resistance. When the high-boron high-speed steel roller material is used as a roller, the service life is prolonged by more than six times relative to a high nickel-chrome infinite cast-iron roller, and prolonged by 20% relative to a high-vanadium high-speed steel roller. Moreover, the roller is safe to use and reliable.

The invention relates to the technology field of an antioxidation coating, in particular to a stainless steel high-temperature oxidation-resistant coating and the application thereof, and solves the problems in the prior stainless steel oxidation-resistant coating such as complex production process, high cost, low protection temperature, narrow painting temperature range and so on. The stainless steel high temperature oxidation-resistant coating is prepared with organic powdered ore in an amount of 30 to 50 parts; an inorganic binder in an amount of 50 to 70 parts; a suspending agent in an amount of 0.1 to 1 part; and water in an amount of 200 parts. The stainless steel high temperature oxidation-resistant coating is applicable to oxidation protection/decarburization when semi-finished nickel chromium stainless steel products are heated for 0.5 to 30 hours at the temperature of 800 DEG C to 1500 DEG C, and is sprayed or coated on stainless steel surfaces within the range from room temperature to 500 DEG C. The coating thickness ranges from 50 Mu m to 300 Mu m. The coating formed at the high temperature forms a vitreous dense coating during high-temperature processing of a stainless steel basal body, and prevents oxygen from spreading on the surface of the stainless steel basal body, thus resisting oxidation, alleviating depletion and decarburization of microelements on stainless steel surfaces, and improving the rolling quality of the surface of the base body. The raw materials used for preparing the coating are cheap, and the coating is friendly to the environment. The preparation process is simple. The high-temperature oxidation and melting loss of various semi-finished nickel chromium stainless steel products is reduced by more than 90 percent, and the output and the yield of good plate blanks can be improved.

The invention discloses a method for thermal spraying of a composite bottom layer of an aluminum pan of an electromagnetic oven, which is used in the manufacturing industry of food cookers and is as shown by a drawing appended to the abstract. A magnetic composite layer with a certain thickness is formed by using an automatic spraying method, designing the joint of a coating and the pan bottom into a concave mosaic structure and spraying a magnetic material (pure iron, iron alloy or 430 stainless steel) to the bottom of the aluminum pan so as to meet the operating requirements of the electromagnetic oven. According to the requirements of a product, one or more material (copper, stainless steel, aluminum, nickel, chromium or ceramic) coatings with different thicknesses or functions can be sprayed to realize aesthetic property, practicability and functionality of the electromagnetic oven pan to ensure that the pans for the electromagnetic oven become various middle-grade and high-grade series products.

Sensor systems and methods are disclosed herein. A relative humidity sensor is generally associated one or more porous heating elements. A porous resistive material surrounds the relative humidity sensor. Additionally, one or more flat heating elements can be bonded to a base of the relative humidity sensor to conduct heat and insure uniform heating about the relative humidity sensor. The porous heating elements can be configured to permit humid air to pass through the porous heating elements. Also, the porous heating element(s) can be assembled slightly offset from a surface of the relative humidity sensor so that air that is saturated with water vapor passes through and is heated by the porous heating element in order to evaporate water droplets associated with the water vapor and thereby reduce relative humidity to a measurable level. The porous resistive material can be configured from a material such as, for example, tantalum or nichrome. The porous resistive material can also be configured in a sheet arranged in a woven pattern.

The production process for forming high-alloy wear-resisting layer composite material on the surface of carbon steel or alloy steel includes the following steps: firstly, selecting and using 40-80 % of alloy powder which is formed from Cr, Mo, W, V, Ti, Ni, Co, Mn, B and C and whose grain size is 0.005-0.8 mm or selecting and using sintered hard alloy granules whose grain size is 0.4-0.8 mm and 20-60 % of nichrome alloy powder whose grain size is 0.05-0.1 mm, mixing adhesive and alloy powder and stirring them to obtain the alloy powder coating material, then applying the alloy powder coating material on the side surface of casting mould, and third step pouring and forming to form alloy layer with compact structure, and the combination of alloy layer and self-body is good.

The invention discloses low-radiation coated glass capable of being toughened off line, which comprises a glass substrate. A silicon nitride Si3O4 layer, a metal nickel-chromium NiCr layer, a metal silver Ag layer, a metal nickel-chromium NiCr layer and a silicon nitride Si3O4 layer are sequentially arranged on the glass substrate. A production method of the low-radiation coated glass capable of being toughened off line comprises the steps of respectively setting the basic vacuum and the linear speed of dual-end offline high-vacuum magnetron sputtering coating equipment to be 10<3> Pa and 2.5m/minute, and the sequentially sputtering the silicon nitride Si3O4 layer, the metal nickel-chromium NiCr layer, the metal silver Ag layer, the metal nickel-chromium NiCr layer and the silicon nitride Si3O4 layer on the glass substrate. On the premise that the low radiance and the low heat transfer performance of the coating are realized, the low-radiation coated glass capable of being toughened off line has the advantage that the deep processing such as heat treatment at different places of the glass can be realized.

A new class of high-alloy metals is invented. The metals possess an amorphous, nano crystalline, or combined amorphous-nano-crystalline structure and are reinforced, stabilized and hardened with a framework formed by predominantly sp3-bonded carbon, also known-as diamond like carbon. Optionally, other alloying nonmetallic elements selected from the group of Si, B, O, N may additionally stabilize the structure. The disclosed high-alloy metals comprise a metallic matrix which may include iron, nickel, chromium, refractory, and various other metals. These materials are very stable, and do not suffer a structural degradation up to relatively high temperatures. The disclosed high-alloy metals have the properties of high hardness, corrosion and wear resistance, and low friction. They have a wide range of applications as protective coatings on a wide variety of materials in various industries. They may be further applied as magnetic and electronic devices, such as field emission cathodes. Some of these alloys possess high emissivity, and their electrical conductivity may be varied in a relatively wide range.

A high strength spring steel of this invention is characterized in containing, in percent of mass, of C: 0.36-0.48%; Si: 1.80-2.80%; Mn: 0.20-1.40%; P: 0.015% or less; S: 0.010% or less; Cu: 0.10-0.50%; Ni: 0.10-2.00%; Cr: 0.05-1.20%; s-Al: 0.005-0.040%; N: 0.002-0.012%; O: 0.002% or less, while the remainder is constituted of Fe and inevitable impurities and the quantity of inclusions of 10 μm or larger in diameter per field of vision of 100 mm² is 10 or less. A manufacturing method of high strength spring of this invention is characterized in that the high strength spring steel which is tempered to HRC52 or higher is formed into a spring shape by hot forming or cold forming and warm shot peening is carried out so as to produce a high strength spring of 1176 MPa or higher in maximum shearing stress.

A combustion turbine component (10) includes a combustion turbine component substrate (16) and an alloy coating (14) on the combustion turbine component substrate. The alloy coating (14) includes a first amount, by weight percent, of cobalt (Co) and a second amount, by weight percent, of nickel (Ni), the first amount being greater than the second amount. The alloy coating further includes chromium (Cr), aluminum (Al), at least one rare earth element, and an oxide of the at least one rare earth element.

A method and apparatus for a high-moment magnetic material used in a write head deposited on a gap layer that was grown using a nickel-chromium seed layer. The nickel-chromium seed layer provides the correct crystallographic orientation for both the nonmagnetic gap layer and the high-moment magnetic material such that the high-moment magnetic material has soft-magnetic properties and is useful as either a main pole or as shield layer in a write head. Moreover, the nickel-chronium seed layer, which may be exposed on the air bearing surface (ABS) of the write head, has an etch rate similar to other metals found in the ABS, thereby avoiding pole tip protrusion during later processing.

The invention discloses a non-sticky nonrust iron pan, comprising a metal base, wherein a FeCr chromium carbide or NiCr chromium carbide or CoCr chromium carbide metal material layer is meltallized on the working surface of the metal base, a non-sticky layer which is provided with micro holes and is easy to clean is formed, and a nitriding layer is formed on the surface of the metal base communicated with the micro holes by virtue of nitriding treatment. The invention also discloses a method for manufacturing the non-sticky nonrust iron pan, comprising the following steps: (1) cutting, stretching, removing oil and cleaning, decontaminating and dewaxing, and stoving; (2) coarsening; (3) forming the non-sticky layer which is easy to clean on the working surface; (4) forming the nitriding layer by the nitriding treatment; and (5) carrying out cleaning, stoving and the like. The non-sticky nonrust iron pan disclosed by the invention has the advantages of sticky resistance, rust resistance, white appearance, energy conversation and the like.