19 results about "Chromium nickel" patented technology

The invention relates to the field of furnace lining materials, in particular to a rapid repairing material for a tapping hole and a furnace lining of an intermediate frequency furnace. The rapid repairing material comprises the following components in parts by weight: 50-70 parts of tabular corundum, 10-20 parts of fused magnesite, 8-15 parts of alumina micro powder, 3-8 parts of nano zirconia, 5-12 parts of silicon carbide, 10-15 parts of silica sol and 2-5 parts of a reinforcing agent. Wherein the reinforcing agent is titanium calcium aluminate coated with chromium nickel boride. The tabular corundum is mainly used as an integral framework; the fused magnesite is matched with the alumina micro powder to form magnesium aluminate spinel with a high melting point; the nano zirconium oxide can fill pores and is excellent in toughness; the silicon carbide has the advantages of high hardness, high thermal conductivity and high melting point; the reinforcing agent is titanium calcium aluminate coated with chromium nickel boride, although the adding amount is small, the high-temperature strength, toughness and thermal shock resistance of the repairing material can be remarkably improved, and especially the long-term corrosion resistance can be remarkably improved.

The invention provides an NC30Fe high-chromium nickel-based alloy pierced billet as well as a preparation method and application of the NC30Fe high-chromium nickel-based alloy pierced billet. The preparation method comprises the following steps: firstly, heating an NC30Fe high-chromium nickel-based alloy tube blank to a specific charging temperature, and perforating by utilizing a hot cross rolling perforation process; in the punching process, it is ensured that the dimensional tolerance and eccentricity of a pierced billet meet the requirements by strictly controlling the roller distance, the top temperature and the extension coefficient; and then, quenching treatment is carried out on the pierced billet subjected to perforation, so that the grain size is controlled to be within the range of grade 3 to grade 7, and the high-temperature strength and creep resistance of the material are improved. According to the preparation method disclosed by the invention, through introduction of a hot cross piercing process, the problems of more surface defects, large eccentricity and difficulty in grain control caused by a traditional hot extrusion process are solved, the yield is increased to 93% or above, and the surface smoothness and the dimensional precision are remarkably improved. The pierced billet is suitable for preparation of high-temperature corrosion-resistant and high-precision nickel-based alloy pipes in the fields of petroleum, chemical engineering, aerospace and the like, and has high application value.

The invention discloses a coating for improving oxidation resistance of a chromium-nickel coating, which is characterized in that after the surface of a workpiece to be plated is cleaned and preheated, coating slurry is uniformly sprayed on the surface of the workpiece, the spraying pressure is 0.5-2 MPa, and the thickness of a coating layer is 0.1-5 mm; and finally, carrying out high-temperature heat treatment to obtain the chromium-nickel anti-oxidation coating. Wherein the solid phase component of the slurry comprises the following components in percentage by mass: 50 to 80 percent of Cr, 15 to 45 percent of Ni, 2 to 6 percent of CeO2, 2 to 6 percent of FeV80 and 1 to 5 percent of NH4Cl. According to the method for improving the oxidation resistance of the chromium-nickel coating, the prepared infiltrated layer is uniform in organizational structure, moderate in thickness, sufficient in Cr atom diffusion, good in metallurgical bonding with a base body, not prone to falling off and suitable for austenitic steel and high-temperature alloy parts used for workpieces with the large length-diameter ratio and various complex shapes such as large boilers and oil and gas field conveying pipelines; and the method has excellent industrial batch production benefits.

The invention discloses a chromium-nickel cladding coating suitable for the outer wall of the flue gas side of a boiler pipeline, which is characterized in that cladding powder is prepared according to a mass ratio, and after the surface of a workpiece to be plated is cleaned, a chromium-nickel anti-oxidation coating is prepared through plasma cladding; wherein the solid-phase cladding powder comprises the following components in percentage by mass: 50 to 80 percent of Cr, 10 to 40 percent of Ni, 2 to 5 percent of CeO2, 2 to 5 percent of FeV80 and 0 to 5 percent of NH4Cl. The chromium-nickel cladding coating suitable for the outer wall of the flue gas side of the boiler pipeline is uniform in structure, moderate in thickness, sufficient in Cr atom diffusion, good in metallurgical bonding with a base body, not prone to falling off, suitable for austenitic steel and high-temperature alloy parts used for workpieces with large length-diameter ratios and various complex shapes such as large boilers and oil and gas field transportation pipelines, and capable of achieving the purpose of improving the performance of the coating and the application of the chromium-nickel cladding coating on the outer wall of the flue gas side of the boiler pipeline. And the method has excellent industrial batch production benefits.

The invention discloses a chromium-nickel coating based on CeO2 and Y2O3 modification and a preparation method of the chromium-nickel coating. Cladding slurry is uniformly sprayed to the surface of a workpiece, and a chromium cladding coating is obtained through laser cladding; wherein the cladding powder comprises the following components in percentage by mass: 40 to 70 percent of Cr, 20 to 50 percent of Ni, 0 to 5 percent of CeO2, 0 to 5 percent of Y2O3 and 1 to 5 percent of NH4Cl. The prepared chromium-nickel coating is uniform in organization structure, moderate in thickness, sufficient in Cr atom diffusion, good in metallurgical bonding with a base body, not prone to falling off, good in corrosion resistance and suitable for austenitic steel and high-temperature alloy parts used for workpieces with the large length-diameter ratio and various complex shapes such as large boilers and oil and gas field conveying pipelines. And the method has excellent industrial batch production benefits.

The application belongs to the technical field of silicon steel heat treatment equipment, and discloses a use method of a horizontal coil bottom base for ring furnace steel coil annealing, wherein the horizontal coil bottom base is an integral annular bearing saddle base, is made of ZG40Cr25 and trace element rare earth reinforced high-chromium nickel austenitic heat-resistant cast steel material, is made through integral precision casting, high-temperature forging densification and plane finishing, has a total height of 200 mm, and has a single-piece weight of 1803 kg. The use method of the horizontal coil bottom base for ring furnace steel coil annealing changes the traditional vertical placement of the silicon steel coil into lateral placement with coaxial bearing, so that the steel coil gravity is evenly distributed along the circumferential direction, and the bearing deformation of the lower end edge of the steel coil caused by concentrated stress in the vertical state is completely avoided. The change is beneficial to the uniform secondary recrystallization of the oriented silicon steel in the high-temperature annealing process, and effectively prevents the decrease of magnetic permeability and the increase of iron loss.

A high-chromium nickel-iron-based high-temperature alloy and its preparation method, belonging to the technical field of high-temperature alloy materials, address the drawback of existing alloys in that they struggle to simultaneously achieve high oxidation resistance and ease of machinability. The high-chromium nickel-iron-based high-temperature alloy comprises, by mass percentage, 30-42% Fe, 18-25% Cr, 1.5-2.5% Ti, 1.2-2.5% Al, 0.5-2% Ta, 0.5-1.5% Hf, 0.02-0.1% Zr, 0.03-0.1% C, ≤0.006% B, with the balance being Ni. The alloy exhibits excellent corrosion resistance and good machinability.

The application discloses a manufacturing method of high-toughness steel guide, and relates to the technical field of metallurgy.The high-toughness steel guide is based on a 4Cr18Ni alloy of medium-carbon high-chromium nickel, and the element composition of the 4Cr18Ni alloy comprises C: 0.35-0.45%, Cr: 17-19%, Ni: 0.8-1.2%, Si: 0.5-1.0%, Mn: 0.5-1.0%, and the rest is Fe and inevitable impurities.Based on the element composition, the high-toughness steel guide is subjected to high-temperature normalizing-tempering heat treatment technology, so that the toughness of the guide material is greatly improved, the hardness and wear resistance of the guide material are considered, compared with a conventional quenching or annealing process, the heat treatment equipment and time cost are reduced, and the high-toughness steel guide has high production application value.

The utility model relates to the technical field of large-and-small-head pipelines, and discloses a high-chromium-nickel-molybdenum alloy composite large-and-small-head pipeline for a desulfurization system, which comprises a pipeline body, a large-head pipe flange is annularly arranged on the outer wall of one end of the pipeline body with a larger pipe diameter, and an FRP (Fiber Reinforced Plastic) lining matched with the pipe diameter is paved on the inner wall of the pipeline body. The outer wall of the end, away from the large-head pipe flange, of the pipeline body is connected with a connecting ring with the surface covered with threads, the pipeline body is connected with a small-head filter pipe through the connecting ring, and a sealing ring is annularly arranged at the joint of the connecting ring and the small-head filter pipe. The high-chromium-nickel-molybdenum alloy composite large-small-head pipeline for the desulfurization system is provided with the filter plate which is used for filtering and removing impurities from sulfur-containing or desulfurized gas conveyed in the desulfurization system, and through the structure, convenient to disassemble and assemble, of the small-head filter pipe, a worker can conveniently clean impurity particles and the like which are filtered and intercepted, the pipeline body is prevented from being blocked, and the service life of the pipeline is prolonged. And the durability of the pipeline body is improved.

The invention provides a method for synergistically smelting nickel-chromium stainless steel mother liquor. The method comprises the following steps of burdening, uniform mixing, ball pressing / drying, pre-reduction and reduction melt separation. According to the method, three original production lines of ferronickel and ferrochrome alloy production and stainless steel mother liquor preparation through mixing and remelting are combined into one process, laterite-nickel ore and chromite are directly utilized for collaborative agglomeration, and the high-chromium nickel-chromium stainless steel mother liquor is prepared in a low-carbon mode through an integrated pre-reduction-electric furnace smelting technical route. According to the method, MgO / SiO2 and Al2O3 / SiO2 in the ferrochrome smelting slag are reduced by adding the silicon-magnesium type laterite-nickel ore, and the smelting slag amount of the high-carbon ferrochrome is reduced by adding the limonite type laterite-nickel ore. By means of the method, the stainless steel production process can be simplified, smelting energy consumption is reduced, addition of auxiliary materials is reduced through the synergistic effect of the raw material end, the slag amount is reduced, economic benefits are improved, and market competitiveness is enhanced.

The traditional hydrogen-rich equipment adopts plastic and metal materials, and heavy metals such as plasticizer, antimony, chromium nickel iron and lead cadmium are easily separated out, and long-term drinking is easy to accumulate in the body and induce chronic diseases, and the existing water quality standard only limits the limit value, and the trace pollution hidden danger cannot be eradicated. The application discloses a kind of hydrogen-rich drinking water preparation device of stone hydrogen, which is composed of natural mineral compound formula and quartz ceramic reaction kettle;The mineral raw material contains three types of main mineral components, modified raw materials and slow-release fillers, and the long-acting slow-release hydrogen is compounded in proportion;The equipment cavity adopts high-purity quartz and special ceramic inert materials, and there is no corrosion and harmful substance separation, which guarantees the long-term drinking safety of hydrogen-rich drinking water from the source.

A burner includes a flame-spreading element comprising of a foamed nickel or chromium nickel plate. The burner includes a supporting element adapted to support the plate over an open chamber. The open chamber has sloped bottom walls and is arranged in fluid communication with an inlet on the burner that is positioned lower than the plate. Hydrogen gas flows from the inlet upward in the open-top chamber to the plate. Hydrogen gas is mixed with air (oxygen).

The invention discloses a wet etching method for chromium-nickel-gold special metal and a wafer manufactured by the wet etching method, and belongs to the technical field of semiconductor device manufacturing processes, and the wet etching method comprises the following steps: evaporating Cr / Ni / Au on the front surface of the wafer to obtain the wafer with a Cr / Ni / Au film; sequentially carrying out metal Au photoetching, hardening, bottom film coating and metal Au wet etching on the wafer with the Cr / Ni / Au thin film to obtain a treated wafer; and sequentially carrying out hardening, metal Cr / Ni wet etching and dry photoresist removal on the treated wafer to obtain the wafer with the Cr / Ni / Au pattern. The problem that the existing Au / Cr / Ni three-layer composite metal is poor in corrosion morphology can be solved.

The invention discloses a manufacturing method of a high-toughness rolled steel guide and guard device, and relates to the technical field of metallurgy. The high-toughness steel rolling guide is based on a medium-carbon high-chromium-nickel 4Cr18Ni alloy, and comprises the following elements in percentage by weight: 0.35 to 0.45 percent of C, 17 to 19 percent of Cr, 0.8 to 1.2 percent of Ni, 0.5 to 1.0 percent of Si, 0.5 to 1.0 percent of Mn and the balance of Fe and inevitable impurities. On the basis, through the high-temperature normalizing-tempering heat treatment technology, the toughness of the guide and guard material is greatly improved, meanwhile, the hardness and the abrasion resistance of the guide and guard material are considered, compared with a conventional quenching or annealing technology, the heat treatment equipment and time cost are further reduced, and high production and application value is achieved.

The present application relates to a kind of high chromium nickel-based superalloy 3D printing structural member heat treatment method.The above-mentioned heat treatment method includes the following steps: high chromium nickel-based superalloy 3D printing structural member is placed into heat treatment furnace;Vacuumizing treatment is carried out to heat treatment furnace;High chromium nickel-based superalloy 3D printing structural member in vacuum environment is heated for the first time, until heated to 600 ℃±10 ℃;High chromium nickel-based superalloy 3D printing structural member is kept for the first preset time period;High chromium nickel-based superalloy 3D printing structural member in vacuum environment is heated for the second time, until heated to 800 ℃±10 ℃;High chromium nickel-based superalloy 3D printing structural member is kept for the second preset time period;High chromium nickel-based superalloy 3D printing structural member is cooled to room temperature.The use of heat treatment method can improve the processing efficiency of high chromium nickel-based superalloy 3D printing structural member, reduce processing cost, improve high temperature endurance performance, so that tensile property, elongation and impact performance are all beyond the level of forging.

The application discloses a kind of vehicle-mounted new energy TMR auger surfacing structure and process, it is related to the manufacturing technology field of livestock machinery, including: auger matrix, buffer corrosion-proof layer on the outer edge wear-resistant area of spiral blade of the auger matrix and hard antifriction wear-resistant layer on the outer surface of the buffer corrosion-proof layer;The buffer corrosion-proof layer is high-chromium nickel-based alloy layer;The hard antifriction wear-resistant layer is the high-chromium cast iron composite layer containing coarse tungsten carbide particles;The hard antifriction wear-resistant layer is discontinuous fish scale array distribution.The application is designed by toughness corrosion-proof buffer layer and high-hardness wear-resistant surface layer compound, and adopts discontinuous fish scale array surfacing process, realizes the significant improvement of comprehensive performance, and the wear-resistant surface layer of coarse tungsten carbide and high-chromium cast iron constitutes high hardness, can absorb new energy drive system instantaneous impact and hard foreign matter impact energy, avoid hard wear-resistant layer collapse and fall off.

The invention relates to the technical field of smelting, and discloses vacuum smelting equipment for high-chromium nickel-based cast superalloy, which comprises a smelting furnace, a crucible is arranged in the smelting furnace, and the smelting furnace is rotatably mounted on a base; the feeding mechanism comprises a feeding bin located above the smelting furnace, the interior of the feeding bin is divided into a plurality of containing units through a plurality of rotating plates, casting raw materials of the high-chromium nickel-based cast high-temperature alloy can be placed in each containing unit, and a discharging opening is formed in the bottom of the feeding bin; the discharging mechanism comprises a material guide pipe inserted into the smelting furnace, the material guide pipe is located in a flow guide cylinder, the flow guide cylinder is rotationally connected with the side wall of the smelting furnace, the flow guide cylinder is installed on the base, and the smelting furnace inclines to enable a liquid metal material in a crucible to flow into the flow guide pipe and enter a pouring cavity. The smelting furnace, the guide cylinder and the pouring cavity are communicated with one another, the chance of making contact with the external environment in the feeding and discharging process is reduced, the preset vacuum degree can be well kept, and feeding and discharging are convenient.

The application discloses a production method of medium-high-chromium nickel-reduced austenitic stainless steel strip, which comprises the steps of continuous casting, heating in a heating furnace, rough rolling, finish rolling and the like, wherein the process parameters of the continuous casting step are adjusted to lay a foundation for rough rolling, and the temperature settings of each stage in the heating furnace ensure that the temperature inside and outside the slab is uniform; and because the heating speed is moderate, the slab will not be cracked due to excessive local thermal stress; the target temperature T in the second heating section is calculated according to a formula according to the actual composition; the setting of the target temperature can ensure that the continuous casting blank is heated away from the high-temperature two-phase zone temperature, and the growth of ferrite in high-temperature production is avoided, thereby reducing the risk of edge cracking and ensuring that the high-nitrogen continuous casting blank obtains the necessary heating temperature, and the phenomenon of being unable to be rolled in the rolling process is avoided. Through the whole-process process adjustment and optimization, the medium-high-chromium nickel-reduced austenitic stainless steel coil obtained is free of edge cracking, has good surface quality, and only has sporadic peeling defects or no peeling defects.

This application belongs to the field of metallurgical technology, and particularly relates to a smelting method for improving the purity of high-temperature alloys. Because chromium has a strong affinity for oxygen when the chromium content in high-chromium nickel-based high-temperature alloys is high, if titanium is directly added for alloying, titanium will preferentially react with residual oxygen and nitrogen to form TiO2 and TiN inclusions, resulting in extremely low titanium yield and deterioration of purity. The embodiments of this application break through the limitations of traditional single deoxidation modes. Based on the thermodynamic coupling reaction characteristics of oxygen, nitrogen, and titanium in the high-temperature alloy smelting process, a multi-stage thermodynamic deoxidation technology route with synergistic matching of temperature, deoxidizer type, and deoxidation depth is constructed. Through a sequential combination of carbon pre-deoxidation – strong deoxidizing metal + rare earth enhanced deoxidation – low-temperature titanium alloying, a controllable metallurgical transformation from high-oxygen-content raw materials to ultra-pure high-titanium melt is achieved. This solves the technical contradiction of difficulty in simultaneously achieving purity and precise composition control in high-chromium, high-titanium nickel-based high-temperature alloys due to the high activity of titanium and the difficulty in controlling oxygen and nitrogen.