33 results about "Chromel" patented technology

The invention relates to a titanium contained high chromel alloy and application thereof in spraying materials. The components of the alloy are (by weight percentage) as follows: the content of chromium is more than or equal to 15 percent and less than or equal to 25 percent, the content of titanium is more than or equal to 1 percent and less than or equal to 6 percent, the content of silicon is more than or equal to 1 percent and less than or equal to 6 percent, the content of carbon is more than or equal to 0 percent and less than or equal to 0.02 percent, the content of nickel is more than or equal to 20 percent and less than or equal to 55 percent, the content of rhenium is more than or equal to 0.5 percent and less than or equal to 6 percent, the content of aluminum is more than or equal to 0 percent and less than or equal to 6 percent, the content of sulfur is more than or equal to 0 percent and less than or equal to 0.035 percent, he content of phosphorus is more than or equal to 0 percent and less than or equal to 0.035 percent, the content of manganese is more than or equal to 0 percent and less than or equal to 0.2 percent, and the rest is iron. After the parts of working equipment are sprayed at high temperature oxidation and high temperature corrosion environments by the spraying material produced by the alloy, since the coating has good high temperature oxidation and vulcanization resistance and hot corrosion resistance performances, the service life of the parts can be greatly improved.

The invention discloses a superhard cutter with high hardness and good abrasive resistance and heat resistance. The cutter comprises the following components in percentage by weight: 75-85 percent of cubic boron nitride micro powder with the granularity of 1-10 mum, 0.5-3 percent of microlite powdered boron with the purity above 99.5 percent, 5-10 percent of microlite powdered aluminum with the purity above 99.5 percent, and 6-15 percent of carbon with a diamond structure. Because the invention is prepared by adopting the cubic boron nitride as a main raw material and adding the high-purity microlite powdered aluminum and the high-purity microlite powdered boron as well as the carbon with the diamond structure under super-high pressure and high temperature, the high hardness, the abrasive resistance and the heat resistance are obviously improved; and the superhard cutter is used for high-hardness alloy materials with turning HRC within 48-53, and has better effect particularly on chromel alloy materials.

The invention discloses an aluminum base printed circuit board and a preparation method thereof, which solves the technical problem that the insulating, temperature resistant and withstand voltage values and the scratch fineness of the printed circuit board are improved. An insulating layer is formed on the surface of an aluminum base plate; a copper conducting layer is covered on the insulating layer; and a transition layer and a copper conducting film are arranged between the insulating layer and the copper conducting layer. The preparation method comprises the steps of depositing a transition layer chromium, nickel or chrome-nickel alloy film on the insulating layer of the aluminum base plate, depositing the copper conducting film on the transition layer, and electroplating the copper conducting layer on the copper conducting film. Compared with the prior art, the aluminum base printed circuit board has the advantages that as the aluminum base plate is adopted, aluminum oxide of the aluminum base plate forms the insulating layer, as the nano transition layer is adopted, the adhesive force between the conducting layer and the base plate is greatly improved, and when traditional typographies, such as photograph and chemical corrosion, are adopted, scratch is finer, the manufacture is more precise, and the requirements on large power and high integration to the printed circuit board are satisfied, so that the large power and high integration of the printed circuit board are realized.

The invention provides a method for preparing chromel alloy by stainless steel pickling sludge. The method comprises the steps as follows: an alkali liquor is added into the stainless steel pickling sludge, pH is adjusted to be in a range from 6.5 to 7.5, and neutral sludge is obtained; the neutral sludge is added into a rotary kiln for drying to obtain a dry basis; the dry basis is added into a ball forming machine, and coke and starch are simultaneously added for ball forming to obtain mixed particles; the mixed particles are added into the rotary kiln for reduction smelting, the smelting temperature is simultaneously controlled in a range from 1,250 DEG C to 1,400 DEG C, and an additive is simultaneously added for an early reduction reaction for 1-2 hours to obtain metallic balls; and a hot bag containing the metallic balls is placed into an electric plasma furnace for melting and smelting to obtain the chromel alloy. With the adoption of the method, waste is changed into valuable materials, the stainless steel pickling sludge which can pollute the environment is neutralized, nickel-chromium elements are reduced to obtain the chromel alloy for metal smelting; and the chromel alloy with high recovery rate and high content is obtained through addition of an NCP additive and sodium sulfate.

A two-piece block nozzle is disclosed. In some embodiments, the two-piece nozzle may include a nozzle section and a base section. The nozzle section may be detachably engaged to the base section. The nozzle section may be formed with a temperature resistant material such as, for example, a chrome-nickel alloy or a stainless steel alloy. The base section may be formed with a relatively lower cost material such as, for example, a ductile iron material.

The invention discloses a high-strength and high ductility-roughness sandy water erosion resisting clean martensitic stainless steel alkaline welding electrode and a preparation method thereof. The high-strength and high ductility-roughness sandy water erosion resisting clean martensitic stainless steel alkaline welding electrode comprises a chrome-nickel alloy core wire and a coating wrapping thesurface of the core wire. The coating comprises the following components, by weight, of 7-11 parts of marble, 8-11 parts of fluorite, 0.4-2 parts of rare earth fluoride, 2-5 parts of silicate, 0.4-2parts of electrolytic manganese, 1-3 parts of ferrotitanium, 1-3 parts of ferrosilicon, 4-6 parts of ferrous powder, 3-5.6 parts of ferrochromium, 0-2 parts of nickel powder, 1.6-3.0 parts of ferromolybdenum and 0.4-1.0 part of sodium carbonate. When the high-strength and high ductility-roughness sandy water erosion resisting clean martensitic stainless steel alkaline welding electrode is welded,an electric arc is stable, splashing is little, the fluidity of slag is good, the deslagging effect is good, a formed weld joint is attractive, and operability in the full position is good. The mechanical properties, such as tensile strength (Rm), yield strength (Rp0.2), the after-fracture elongation (A) and impact energy (KV) at the temperature of 0 DEG C, of welding deposited metal are excellentunder the heat treatment state and the normal-temperature condition, especially, impact absorbed energy at the temperature of 0 DEG C reaches 70 J or above under the situation that the strength is larger than 850 MPa.

The invention discloses a method for smelting chromel alloy by stainless steel dedusting ash and laterite-nickel ore. The method comprises the steps as follows: a stainless steel dedusting ash briquette is manufactured; the stainless steel dedusting ash briquette is added into the laterite-nickel ore, the laterite-nickel ore is placed in an electric plasma furnace to be molten into a mother liquid, the temperature of the molten mother liquid ranges from1,650 DEG C-1,750 DEG C; coke is added for smelting after the mother liquid is molten completely, the smelting temperature is controlled in a range from 1,650 DEG C to 1,750 DEG C simultaneously, and an additive is simultaneously added for an early reduction reaction for 1-2 hours; after the early reduction reaction is finished, a fluxing agent and calcium carbonate are added for continuous reduction reaction for 1-2 hours, so that a metal liquid is obtained; the temperature of the metal liquid is adjusted in a range from 1,650 DEG C to 1,750 DEG C, dregs are removed, and the metal liquid is remained; and pouring is performed to form ingots. With the adoption of the method, waste is reused, so that pollution of the waste on the environment is reduced; and further, steel-making dedusting ash and the laterite-nickel ore are sufficiently combined for smelting, and the chromel alloy with high recovery rate and high content is obtained through addition of an NCP-2 additive.

The embodiment of the invention discloses a manufacturing method of a pyroelectric infrared detector sensing unit. The manufacturing method includes the steps that a lithium tantalite wafer substrate is manufactured; a chromium metallic film is formed on the first surface of the lithium tantalite wafer substrate; a nickel metallic film is formed on the chromium metallic film; a first chrome-nickel alloy layer is formed on the nickel metallic film, and an upper electrode is formed through etching; a second chrome-nickel alloy layer is formed on the second surface of the lithium tantalite wafer substrate, and a lower electrode is formed through etching. An absorbing layer of the pyroelectric infrared detector sensing unit manufactured through the method has the advantages of being good in repeatability, high in absorptivity, small in specific heat capacity and excellent in heat transfer performance, attachment is firm, the absorbing wave band is wide, the spectrum is flat, and the absorbing layer can simultaneously serve as an electrode and therefore is suitable for serving as the absorbing layer of the pyroelectric infrared detector sensing unit.

The invention relates to the field of floor heating devices, in particular to an on-instant-heating quick heat generating wire which comprises a heat generating wire body, an insulating layer, a grounding wire, a shielding layer and a protective jacket. The heat generating wire body is divided into a cold wire and a hot wire, the cold wire is a tinned copper wire, the hot wire is chrome-nickel alloy, and the weight percentage of chrome and nickel in the chrome-nickel alloy is 3:7; the cold wire and the hot wire are connected by stranding, and lay ratio of stranding is not smaller than 12; a power source wire is arranged on the outer layer of the heat generating wire body, the power source wire and the heat generating wire body are arranged in the shielding layer side by side, and an electricity leaking protection switch is arranged at a position where the power source wire is connected with a power source. When the heat generating wire body is damaged, the shielding layer is conductive, and the electricity leaking protection switch cuts off a power source, so that the technical defect that heat generating wires are slow in temperature rise and many in potential safety hazards in the prior art is overcome; the quick heat generating wire can realize instant heating immediately after being powered on and is high safety index.

This invention relates to the thermal cloth of latent heat knitting, which is knitted with general yarn and exothermic yarn. The inner core of exothermic yarn is exothermic wire twisted with exothermic metal wire, and the thermal layer outside exothermic yarn is soybean fiber yarn, cotton yarn, or blended yarn. The exothermic wire of inner core of exothermic yarn is nickel wire, Chromel wire or titanium alloy wire, and the inner core of exothermic yarn is connected with direct current source. The thermal cloth can be dealed by rinsing, dyeing, printing, drying, shaping and so on like general knitted cloth, and also can be knitted with many weave crafts such as linter, jacquard. The underclothes made from it are as the same as general underclothes in appearance, and can be washed with washer or hand, dewatered and folded optionally. It is soft, of good air permeability and hygroscopicity, of quick heat diffusion and heating-up and safe to use.

The invention relates to the technical field of automobile part surface repair, in particular to a metal part surface repair material and a metal part surface processing technology and application. The metal part surface repair material is prepared from the following components in percentage by mass: 10-20% of Cr, 1-10% of Si, 1-10% of B, 1-10% of Cu, 1-10% of Mo, 0-5% of Fe, 0-3% of C, 1-20% of WC, and the balance of Ni. The metal part surface repair material has the excellent self-fluxing performance, and a coating prepared through the repair material has the excellent high-temperature wearresistance and corrosion resistance. When the thickness of the coating reaches the 1.5mm ultra-thick thickness, the excellent coating anti-cracking performance is still achieved, and common chromel alloy powder cannot reach the excellent coating anti-cracking performance.

A wear-resistant aluminum alloy belongs to the technical field of alloys. The wear-resistant aluminum alloy of the present invention is composed of the following materials in parts by weight: 1-6 parts of magnesium, 1-3 parts of silicon, 1-3 parts of iron, 1-3 parts of nodular cast iron, 0.1-0.6 parts of titanium, 1-3 parts of nickel-chromium alloy 5 parts, 0.1-1 parts of zinc, 0.1-1.5 parts of manganese, 1-4 parts of copper, 0.1-1 parts of boron, 0.1-0.5 parts of vanadium, 0.1-1 parts of cobalt, 0.1-1 parts of cerium, 0.1-0.5 parts of ytterbium , 1-3 parts of nickel, 1-2 parts of strontium, 0.1-1 part of chromium, and 100 parts of aluminum. The invention improves the strength of the aluminum alloy, has good manufacturing performance and mechanical performance, and enhances the wear resistance and corrosion resistance of the aluminum alloy.

The invention relates to a production method for a chromium-nickel alloy. The method comprises the steps of: firstly conducting burdening according to alloy components and proportion through alloy design, carrying out horizontal continuous casting, preparing a tube blank, performing homogenizing heat treatment, shelling, repeated stretching and intermediate annealing softening, then conducting finished product stretching, and finally carrying out cutting and packaging, thus obtaining the finished product. The alloy material mainly comprises the chemical components of: 36-45 of Cr, 66-75 of Ni, less than or equal to 0.035 of Fe, less than or equal to 0.035 of Cu, less than or equal to 0.08 of Mn and the like, and Ni is taken as the main element. The tube adopting the chromium-nickel alloy has higher seawater corrosion resistance and lower corrosion rate, thus reducing the material cost, enhancing the cost performance, and enlarging application of chromium-nickel alloy in the fields of condensation tubes and heat exchange tubes.

The invention discloses a tool for manufacturing a water-cooling bearing pedestal blank model by one-time molding. The tool comprises a water-cooling bearing pedestal blank model, a tooling part and acontrol part, wherein the tooling part comprises a top plate and a positioning block; a heat resistance wire is fixed on the top plate; an open space is formed by the top plate and the positioning block; and the control part comprises a control switch, a power supply, a lead wire and a contact voltage regulator. According to the tool, a water-cooling tank is processed by matching of the tooling part and the control part, processing is convenient, applicability is flexible and reliable, size precision is high, work intensity is reduced, time for manufacturing a water-cooling bearing pedestal blank model is reduced, and work efficiency is improved; the tooling part is made of an insulating material, and the strength and safety can be ensured; the heating resistance wire made of a chromel filament having a diameter of 3mm can ensure the cutting strength; and the current strength in a lead wire loop is controlled by adjusting the knob of the contact voltage regulator, and the temperatureof the heating resistance wire is controlled. The tool is simple and convenient.

The invention discloses a heating cable for geothermal heating. The heating cable comprises a heating element which comprises cold wires and a hot wire. The hot wire is arranged under the earth surface, and the cold wires are fixedly connected with the two ends and are led out of the earth surface to be connected with a power switch. The outside of the heating element is covered with an insulation layer, a shielding layer and a protection sleeve successively. The heating cable is made of chrome-nickel alloy wires and is soft in texture, fast in heating, stable in heat and safe to use; the insulation layer, the shielding layer and the protection sleeve further protect the usage safety of the heating cable from all sides.

The invention provides an absorption layer for a broadband spectrum pyroelectric detector. The absorption layer comprises a first chrome-nickel alloy layer, a first silicon nitride thin film, a second chrome-nickel alloy layer, a second silicon nitride thin film and a third chrome-nickel alloy layer from the top down in an incidence sequence of the incident radiation. The invention also provides a preparation method of the absorption layer. The method comprises the following steps: preparing the absorption layer on a LiTaO3 wafer, cleaning the LiTaO3 wafer and depositing the third chrome-nickel alloy layer on the A surface of the LiTaO3 wafer; etching the A surface of the LiTaO3 wafer to form a shape structure and size of an electrode, carrying out photoetching patterning on the A surface of the LiTaO3 wafer, and depositing the second silicon nitride thin film on the A surface of the LiTaO3 wafer; depositing the second chrome-nickel alloy layer on the A surface of the LiTaO3 wafer, and carrying out photoetching patterning on the A surface of the LiTaO3 wafer; and 9) depositing the first silicon nitride thin film on the A surface of the LiTaO3 wafer, and depositing the first chrome-nickel alloy layer on the A surface of the LiTaO3 wafer. The absorption layer has the advantages of firm adhesion, good repeatability, wide and flat absorption band, high absorptivity, small specific heat capacity and excellent heat transfer performance and the like.

The invention discloses a method for predicting a formation temperature range of a high temperature ferrite in a Fe-Mn-Si-Cr-Ni alloy. The method is that a critical temperature Tsigma of forming a high temperature ferrite single-phase zone and a width delta T of an austenite plus high temperature ferrite two-phase zone can be calculated directly by putting the weight percentage of each element inthe alloy into a formula. The method is simple and easy to execute, has an accurate the prediction result, can be used as a tool to design the composition of the Fe-Mn-Si-Cr-Ni alloy with high recovery strain and no training and to formulate the heat treatment process, and has important engineering value.