118 results about "Nickel base" patented technology

The invention discloses a foam iron-nickel surface in-situ growth platinum modified nickel-iron layered double hydroxide bifunctional material and a preparation method and application thereof.The preparation method comprises the steps that a foam iron-nickel substrate is immersed in an acid solution containing chloroplatinic acid, heating treatment is conducted for a certain period of time, and then the nickel-iron layered double hydroxide bifunctional material is obtained; and a nickel-iron layered double-metal hydroxide mixed material modified by platinum nanoparticles grows on the surface of the foam iron-nickel in situ. In the preparation process of the one-step method, nickel ions or / and iron ion salts and sacrificial agents do not need to be additionally added, atom economy is good, reaction conditions are mild, energy consumption is low, and meanwhile the problem that the catalyst is prone to falling off due to multiple times of operation and washing is solved. The platinum / ferronickel layered bimetal hydroxide / foam iron nickel electrode prepared by the method shows excellent hydrogen production and oxygen production activity in an alkaline water electrolysis reaction.

The invention provides a forming method of an IN617 alloy cylindrical forge piece, and relates to the technical field of forging, according to the method, after an IN617 nickel base alloy cast ingot is subjected to homogenization heat treatment, one-heating-number free forging upsetting, one-heating-number drawing-out, closed upsetting, punching, saddle chambering and core rod drawing-out are conducted, and the IN617 alloy cylindrical forge piece is obtained; by strictly controlling technological parameters in the forge piece forming process, the material utilization rate and the production efficiency can be improved, meanwhile, cracking of the end face of the barrel of the IN617 alloy barrel-shaped forge piece is reduced, and the grain size of the forge piece is further refined.

A nickel base superalloy powder for additive manufacturing applications is disclosed. The alloy powder has the following broad weight percent composition:C  0-0.1Mn0.5 max.Si  0-0.03Cr 4-16Fe  0-1.5Mo0-6W0-8Co 0-15Ti0-2Al0.5-5.5Nb0-6Ta 7.5-14.5Hf  0-2.0Zr  0-0.1Re0-6Ru0-3B  0-0.03The balance of the alloy is at least 50% nickel and the usual impurities. An article of manufacture made from the alloy is also disclosed.

The invention discloses a catalyst Cr, Co-Ni (OH) 2 (at) NF based on a nickel base. The catalyst is prepared by taking foamed nickel (NF) as a carrier and doping Cr and Co elements, has efficient urea oxidation reaction (UOR) performance, and can be used for hydrogen production by electrolysis of water and urea pollution treatment. The preparation method comprises the following steps: soaking nickel foam in an HCl solution, soaking the nickel foam in a nickel salt solution with a specific concentration for reaction to generate nickel-based hydroxide, and soaking the nickel-based hydroxide in a solution containing chromic nitrate and cobalt potassium cyanide for reaction to finally generate the catalyst doped with Cr and Co. The catalyst shows low overpotential and good stability in a 1M KOH + 0.33 M urea solution, the overpotential of an anode for hydrogen production through electrolysis of water is remarkably reduced, and meanwhile efficient degradation of urea is achieved.

The invention provides a modification method for improving the performance of Raney nickel electrolyzed water, which comprises the following steps: pre-treating a nickel net, washing the nickel net with alkali, and putting the nickel net into absolute ethyl alcohol for later use; spraying a nickel net, oxidizing the nickel net, carrying out plasma spraying on the nickel net by using powder, roasting at high temperature, and finally activating to obtain the Raney nickel electrode. According to the Raney nickel electrode, the aluminum powder and nickel oxide on the nickel base material can be fully fused through an aluminothermic reaction technology, and the activity of the obtained nickel net after activation is greatly improved compared with that of a traditional Raney nickel electrode; according to the method, nickel powder does not need to be additionally sprayed, the raw material cost in the Raney nickel electrode production process is greatly reduced, operation is easy, and implementation is easy.

The invention discloses a CMAS corrosion resistant novel gradient structure thermal barrier coating and a preparation method thereof, and belongs to the technical field of thermal barrier coatings. The novel gradient structure thermal barrier coating comprises a base body, a spraying state NiCrAlY bonding layer, a spraying state 8YSZ ceramic layer, a spraying state LaYbZrCeO7 ceramic layer and a laser glazing LaYbZrCeO7 ceramic layer from bottom to top, the base body is made of nickel base alloy, and 8YSZ is ZrO2 stabilized by Y2O3 with the mass fraction of 8%. The design thought that the laser glazing compact ceramic layer and the spraying state porous ceramic layer are introduced into the thermal barrier coating structure is adopted, the excellent molten CMAS corrosion resistance can be achieved, meanwhile, the low thermal conductivity is achieved, and wide application prospects are achieved in the field of thermal barrier coating materials.

The invention relates to a forming method for composite electroplating of an MEMS (Micro Electro Mechanical System) probe. Structural patterns of a needle tip or / and a needle body are / is photoetched through a micro-electro-mechanical process, the needle tip or / and the needle body is / are formed through electroplating of a composite plating solution after pretreatment, the composite plating solution is obtained by mixing a metal base solution and a turbid liquid, the metal base solution is a nickel base solution and / or a rhodium base solution, and the turbid liquid is a nickel base solution and / or a rhodium base solution. The suspension is formed by suspending nano-powder in water through a dispersing agent. Compared with the prior art, the technology provided by the invention has the following advantages that the MEMS process technology is combined with the composite plating solution to be used for various probe structures, and the performance of the prepared material is greatly improved compared with that of a pure metal coating; the composite plating solution prepared from the plating solution and the second-phase particles is high in stability, and the electroplating process is easy to operate; the nickel-based composite plating solution can be used for obtaining a main body material with higher hardness, better wear resistance and better flexural property; the rhodium-based composite plating solution is used for preparing a needle point material, has higher hardness and wear resistance, and improves the brittle fracture problem.

The application provides a flat POGO PIN female head connector, which comprises a stainless steel back shell, a plastic front cover and a plastic upper cover arranged at the lower end and the upper end of the front side of the stainless steel back shell respectively, three upper stretch terminals equidistantly arranged on the plastic upper cover, three lower stretch terminals equidistantly arranged on the plastic front cover, and a plastic body integrally injection molded on the upper stretch terminals and the lower stretch terminals; the surface of the upper stretch terminals is sequentially plated with a nickel base layer, a palladium-nickel alloy layer and a gold layer, the surface of the contact area of the lower stretch terminals is sequentially plated with a nickel base layer, a gold layer, a platinum alloy layer, a palladium-nickel alloy layer and a platinum alloy layer to form an anti-electrolytic corrosion plating layer; the end of the upper stretch terminal is provided with a cantilever, and the ends of the three cantilevers are stacked and riveted with a flat plate part; and the front side of the plastic front cover is a flat surface. The flat POGO PIN female head connector realizes quick mutual matching, high-reliability power supply and signal transmission.

The present application relates to a kind of ruthenium doped nickel copper-based heterostructure catalyst and its preparation method and application.Wherein, ruthenium doped nickel copper-based heterostructure catalyst includes foam nickel base and in situ growth on foam nickel base on ruthenium doped nickel copper-based heterostructure Cu2O-Ni (OH) 2, Ru is doped in the crystal lattice of Cu2O-Ni (OH) 2 heterostructure.Ruthenium doped nickel copper-based heterostructure catalyst preparation method includes the following steps: surface cleaning is carried out to foam nickel;Oxalic acid, copper salt and ruthenium salt are dissolved in water, to obtain precursor solution;Foam nickel is placed in precursor solution and hydrothermal reaction is carried out, and ruthenium doped nickel copper-based heterostructure catalyst is obtained after washing and drying.The ruthenium doped nickel copper-based heterostructure catalyst disclosed in the present application can be applied to industrial-grade electrocatalytic decomposition of water hydrogen evolution reaction, and has good electrocatalytic hydrogen evolution performance.

The application discloses a kind of foam nickel load iron nickel bimetallic phosphide heterojunction catalyst and its preparation method and application, belong to electrocatalytic material technical field.The application is in situ grown by hydrothermal deposition in combination with low-temperature phosphorization process, and is prepared on foam nickel base Phosphide iron / Phosphide nickel heterojunction catalyst (Fe2P / Ni2P@NF).The prepared catalyst shows excellent performance in the electrocatalytic reduction of nitrate synthesis ammonia and high nitrate wastewater degradation.The preparation process of the catalyst of the application is simple, low in cost, and little to environmental pollution, and the self-supporting electrode prepared by integration can be directly applied to proton exchange membrane electrolytic cell, and has wide application prospect.

The invention discloses a zinc-nickel battery cathode current collector and a preparation method thereof, and relates to the technical field of zinc-nickel secondary batteries. The negative current collector comprises a copper base material or a nickel base material and an electroplated layer arranged on the surface of the copper base material or the nickel base material, the electroplated layer comprises tin-bismuth alloy, the content of bismuth in the tin-bismuth alloy is 5-15 wt%, and the balance is tin. The tin-bismuth alloy electroplated layer is arranged on the surface of the current collector base material, so that the corrosion resistance and the conductivity of the negative current collector are effectively improved, the interface bonding force between the current collector and an active substance is improved, the cycling stability of the zinc-nickel battery is remarkably improved, and the technical problems that an existing current collector is easy to corrode in an alkaline electrolyte and the interface impedance is increased are solved. The preparation method can be widely applied to the field of preparation of negative current collectors of zinc-nickel secondary batteries and other alkaline secondary batteries.

The utility model discloses a PTC heater structure, including a plurality of PTC heating tube, a plurality of radiating fins and mounting seat, a plurality of PTC heating tube installation is positioned on mounting seat, and a plurality of radiating fins interval arrangement sets up on PTC heating tube, still be provided with corrugated elastic metal sheet between a plurality of radiating fins and mounting seat, the corrugated elastic metal sheet is nickel base alloy material quality, a plurality of radiating fins and mounting seat are all aluminum material quality, the contact surface of a plurality of radiating fins is close to PTC heating tube and has coated nano alumina heat conduction coating, like this, through the elastic deformation absorption vibration energy, and gradient thermal expansion design, reduce the thermal stress, reduce the mechanical stress between mounting seat and fin aluminum pipe, prevent the connection loose after long -term use.

The utility model relates to the field of power electronic devices, in particular to a damping ring for an electric reactor. Comprising an upper shell, a lower shell which is detachably connected with the upper shell, a ring shaft which is detachably arranged between the upper shell and the lower shell, and a winding type annular iron core which is sleeved on the ring shaft and is formed by winding an iron-nickel base alloy belt. According to the utility model, the structural design is further optimized while the good electromagnetic performance of the damping ring is maintained, and the installation convenience, the heat dissipation performance and the universality are improved.

The invention belongs to the technical field of battery pole pieces, and particularly discloses a nickel battery positive pole piece suitable for a three-electrode test and a preparation method of the nickel battery positive pole piece. The method comprises the following steps: carrying out surface pretreatment on a foamed nickel base material, and cutting the foamed nickel base material according to requirements to obtain a conductive substrate; mixing an active substance, a conductive agent, an adhesive (polyvinylidene fluoride), an additive (yttrium oxide) and a solvent to obtain electrode slurry; and then coating a conductive substrate with the electrode slurry, drying and removing floating powder on the surface to obtain the nickel battery positive pole piece suitable for the three-electrode test. The preparation process of the nickel battery positive plate is simple, feasible and novel, and the prepared nickel battery positive plate is relatively high in capacity, good in adhesiveness of active substances and long in service life.

The application discloses a method for preparing electrode materials by magnetic field-induced ion replacement and electrode materials, and belongs to the technical field of functional material preparation. The method comprises the following steps: loading a cobalt-containing metal organic framework material on the surface of a nickel base material through a self-assembly process, and then placing the loaded composite material in a multi-metal mixed salt solution to perform an ion replacement reaction under the driving of an external magnetic field. The method activates the soft magnetic characteristics of the base material by using a magnetic field, can overcome the steric hindrance and high replacement energy barrier caused by the large difference in ion radius, and can thus realize efficient replacement at normal temperature and pressure, form unique active sites and pore structures, and adjust the electronic properties and charge distribution of the material through the strain effect induced by the difference in ion radius, so that the oxygen evolution activity and stability are optimized. The method does not require complex equipment and harsh conditions, is controllable and simple in operation, has the potential for large-scale preparation, and provides a feasible scheme for reducing the cost and increasing the efficiency of an alkaline electrolytic cell.

The invention relates to a Nickel based superalloy and a component of it comprising (in wt%) 12,0% to 15,0% Chromium (Cr), 1,0% to 2,0% Molybdenum (Mo), 3,0% to 12,0% Tungsten (W), 1,2% to 2,0% Aluminum (Al), 1,2% to 2,0% Titanium (Ti) 5 1,2% to 2,0% Niobium (Nb), 0,03% to 0,13% Carbon (C), 0,005 to 0,025% Boron (B) 0,008% to 0,1% Zirconium (Zr), optionally: Silicon up to 0,2% and / or Manganese (Mn) up to 1,0%.

The invention discloses a high-activity large-size water electrolysis hydrogen evolution electrode, and relates to the technical field of clean energy materials, the electrode comprises a foamed nickel substrate and a nickel oxide micro-nano structure layer generated in situ on the skeleton surface of the foamed nickel substrate through pulse laser ablation; according to the high-activity large-size water electrolysis hydrogen evolution electrode, the nickel oxide micro-nano structure layer is generated on the skeleton surface of the foamed nickel substrate in situ through ablation of the pulse laser, so that the nickel oxide micro-nano structure layer is firmly connected with the foamed nickel substrate, and the electron conduction efficiency and the structural stability can be improved; the stability of the electrochemical activity is further improved; meanwhile, the nickel oxide micro-nano structure layer shows high hydrogen evolution catalytic activity, low overpotential, high electrochemical activity and excellent long-term stability in alkaline electrolyte.

The application discloses a preparation method of a ruthenium oxide doped molybdenum oxide / nickel hydroxide full-pH electrolytic water catalyst, and belongs to the technical field of catalyst material preparation. The preparation method of the ruthenium oxide doped molybdenum oxide / nickel hydroxide comprises the following steps: firstly, mixing a molybdenum salt with a sodium dodecyl benzene sulfonate aqueous solution, and then placing the mixture into a foamed nickel base; subsequently, performing a hydrothermal reaction, and then performing a calcination treatment in a reducing atmosphere; finally, immersing the calcination product into a RuCl3 solution to obtain a self-supported heterojunction catalyst RuOx-MoO3 / Ni(OH)2. Through the composite structure design of the transition metal molybdenum / nickel base material and the noble metal ruthenium oxide cluster, the technical bottleneck of low activity and poor stability of the traditional ruthenium-based catalyst is effectively solved. The obtained catalyst exhibits excellent hydrogen evolution reaction (HER) activity and long-term stability in a wide pH range.

The utility model relates to an electrolytic photocatalysis device applied to the field of energy chemistry, which comprises reaction equipment, a reaction tube arranged at the inner end of the reaction equipment, a cushion block fixedly connected to the lower side of the inner end of the reaction tube, a quartz electrolytic tank placed at the upper end of the cushion block, a graphite anode and a nickel-based alloy cathode arranged at the inner end of the reaction tube, the graphite anode and the nickel-based alloy cathode extend into the quartz electrolytic tank, a sealing flange is arranged at the upper end of the reaction tube, a heat preservation tube plug is arranged at the inner end of the reaction tube, an air inlet valve is arranged in the middle of the upper end of the reaction tube, an air outlet valve is arranged on the right side of the upper end of the reaction tube, and a sealing electrode is arranged at the upper end of the reaction tube. The reaction equipment can support two working modes of the heating hearth and the solar simulator at the same time, is suitable for carrying out electrolysis and photo-thermal catalytic reaction on molten salt substances under the high-temperature condition, and can compare the performance difference of electrolysis products under the two heating modes.

This application relates to the field of battery technology, providing a highly conductive nickel-plated copper foil material, its application, and a method for preparing the nickel-plated copper foil material using a warm isostatic pressing (WIP) apparatus. The method includes the following steps: S100, pretreating the copper foil to obtain a copper foil substrate; S200, depositing a nickel base layer on at least a portion of the surface of the copper foil substrate via chemical plating to obtain a first intermediate product; S300, forming a nickel main layer on at least a portion of the surface of the first intermediate product via pulse electroplating to obtain a second intermediate product; S400, subjecting the second intermediate product to warm isostatic pressing to obtain the nickel-plated copper foil material. This application utilizes the deposited nickel base layer as a non-porous underlay, followed by pulse electroplating to refine a dense nickel layer, and finally, warm isostatic pressing under high temperature and high pressure to close pores and promote atomic diffusion at the copper-nickel interface to form a gradient bonding layer, eliminating defects and continuous conductive pathways, thereby improving conductivity, mechanical strength, and electrochemical stability.

The utility model discloses a nickel base alloy casting repairing structure, and particularly relates to the technical field of nickel base alloy castings, the nickel base alloy casting repairing structure comprises a welding machine, the upper end of the welding machine is provided with a rotating table, the upper end of the rotating table is provided with a fixing disc, the outer wall of the fixing disc is provided with bayonets, the upper end of the fixing disc is fixedly connected with a fixing mechanism, and the fixing mechanism is fixedly connected with the welding machine. A positioning mechanism is fixedly connected to the right side of the upper end of the welding machine, and a first fixing plate is fixedly connected to the upper end of the fixing disc. According to the repairing structure for the nickel-based alloy casting, equipment can have the function of fixing the nickel-based alloy casting through the arranged fixing mechanism, the nickel-based alloy casting can be conveniently repaired in multiple directions, and great convenience is brought to use of the device; and through the arranged positioning mechanism, the equipment can rotate the angle of the nickel-based alloy casting, and the casting can be positioned at any time when the casting is repaired, so that the casting is rotated to a proper repairing position, and the efficiency of repairing the casting is improved.

The utility model discloses a standard screen device for nickel-based alloy. The standard screen device comprises a pressing plate, a tightening assembly, an upper cover, an upper-layer screen, a lower-layer screen, a base plate, an upper plate, an ultrasonic device I and an ultrasonic device II. The upper cover, the upper-layer screen, the lower-layer screen and the base plate are circles which are matched with one another, are sequentially, coaxially and horizontally stacked together from top to bottom, and are coaxially placed on the horizontally arranged upper plate; a pressing plate is horizontally arranged on the upper surface of the upper cover, and the upper cover, the upper-layer screen, the lower-layer screen and the base plate are fixed to the upper plate through cooperation of the pressing plate and the binding assembly. An ultrasonic device I is arranged on one side of the outer circumferential surface of the upper-layer screen, and nickel-based alloy powder is subjected to primary screening through cooperation of the ultrasonic device I and the upper-layer screen; an ultrasonic device II is arranged on one side of the outer circumferential face of the lower-layer screen, and nickel base alloy powder is subjected to double screening through cooperation of the ultrasonic device II and the lower-layer screen. According to the utility model, the screening efficiency and the screening precision are improved.

The invention relates to a nickel oxide powder granulation method for plasma spraying, which belongs to the technical field of granulation methods, and comprises the following steps: step 1, mixing a plurality of raw materials in proportion, adding a solvent, and heating and stirring by using a mixing device to form a stable solution; 2, adding nickel oxide particles with the particle size of 5-10 [mu] m by adopting a mixing device, and keeping stirring to form a stable turbid liquid; 3, a centrifugal spray granulation drying machine is used, nickel oxide particle powder with a certain diameter is formed through granulation under specific conditions, the nickel oxide powder is attached to the nickel base material through plasma spraying, the nickel oxide electrode is obtained, the bonding strength, corrosion resistance and electrochemical performance are improved, due to the fact that plasma spraying is high in temperature, materials are molten at the high temperature, and the corrosion resistance of the nickel oxide electrode is improved. When the coating is sprayed to the surface of a base material, the material is in a molten state, is partially reduced, is attached to the surface of the base material, and is cooled to form a high-strength coating with a certain structure, so that a better binding rate can be achieved, and the service life is prolonged.

The invention provides a difunctional electrocatalyst and a preparation method thereof. The preparation method comprises the following steps: a) taking a foamed nickel base material as a cathode and a platinum sheet as an anode, and carrying out first electrodeposition in a first electrolyte to obtain a graded porous structure; the first electrolyte is prepared from NiCl2, NH4Cl and NaCl; b) taking the hierarchical porous structure obtained in the step a) as a cathode and a platinum sheet as an anode, performing secondary electrodeposition in a second electrolyte to form an alpha-Co (OH) 2-coated PN / NF electrode material, and cleaning and drying to obtain the difunctional electrocatalyst, and the second electrolyte is an electrolyte solution of Co (NO3) 2.6 H2O. Compared with the prior art, low-cost and high-efficiency production of the difunctional electrocatalyst is realized by optimizing the preparation process, and the prepared difunctional electrocatalyst shows excellent activity and robustness to HER and OER at the same time, and has wide application prospects.

The invention provides a surface treatment method of an alkaline electrolytic water hydrogen production electrode, which comprises the following steps: a first etching process: contacting a sand-blasted nickel base material with a first etching solution to obtain a nickel base material I; a second etching process: contacting the nickel base material I with a second etching solution to obtain a nickel base material II; the first etching solution contains nitric acid, citric acid and hydrogen peroxide, and the dosage mass ratio of the nitric acid to the citric acid to the hydrogen peroxide is 1: (0.1-2): (0.05-1); the second etching solution contains oxalic acid, phosphoric acid and acetic acid, and the dosage mass ratio of the oxalic acid to the phosphoric acid to the acetic acid is 1: (0.1-1): (0.1-1). According to the method, the nickel base material subjected to sand blasting is subjected to etching treatment twice, the surface of the base material is rapidly etched through rough etching to form a large microstructure, then the formed microstructure is further refined through fine etching, the surface is finer and more uniform, the mechanical bite force of the coating and the base material can be remarkably increased, and the corrosion resistance of the coating is improved. And defects in the coating can also be reduced.

The application discloses a kind of based on saccharide template modified ZSM-5 composite carrier load crystal face Ni2P hydrogen dechlorination catalyst and preparation method, belong to the preparation technical field of dechlorination catalyst.The method includes: first with polysaccharide modified porous ZSM-5 as main body, with LDH base carrier and be compounded to prepare LDH-multistage hole ZSM-5 composite carrier;Afterwards, nickel nitrate, citric acid and ethylene glycol are mixed, and impregnation solution is prepared, and the composite carrier of preparation load nickel base precursor;Finally, the composite carrier of load nickel base precursor is with sodium hypophosphite in nitrogen atmosphere, in situ induction Ni2P (201) Crystal face, Ni2P (211) Crystal face preferential growth, after cooling, passivation treatment, obtain immediately.The hydrogen dechlorination catalyst prepared by the application has excellent low-temperature activity, strong resistance to poisoning and high operating stability, and can achieve efficient and economic deep removal of organic chlorine in the low-temperature purification process of organic solid waste gasification fuel gas.

The application discloses a metal powder negative electrode for an aqueous metal-air battery, the aqueous metal-air battery and a preparation method thereof, and relates to the technical field of batteries. The metal powder negative electrode comprises a foamed nickel base body, a porous structure is formed in the foamed nickel base body, metal powder is filled in the porous structure, and a leakage prevention layer is arranged on the foamed nickel base body and used for preventing the metal powder from leaking out. The PPI of the foamed nickel base body is 10-110, and the diameter of the metal powder is 0.018mm-0.18mm. The metal powder negative electrode has good corrosion resistance, adjustability, processability and low cost, the contact between the metal powder and the current collector is stable, the corrosion and passivation of the metal powder negative electrode are greatly alleviated, and the utilization rate of the metal powder and the discharge performance of the metal-air battery are improved. The metal-air battery has excellent discharge capacity and discharge time under high current density.

The utility model provides a hydrogen evolution electrode for an alkaline water hydrogen production electrolytic bath, which belongs to the technical field of water electrolysis hydrogen production, and comprises a foamed nickel substrate, a plurality of first metal wires and a plurality of second metal wires, the second metal wires are arranged in parallel and vertically and alternately penetrate and are wound on the foamed nickel base body in the second direction, and the first direction is perpendicular to the second direction. According to the hydrogen evolution electrode for the alkaline water hydrogen production electrolytic bath provided by the utility model, the specific surface area of the hydrogen evolution electrode is increased by virtue of the foamed nickel substrate, so that the contact surface of the hydrogen evolution electrode and electrolyte is increased, and the electrolytic hydrogen production efficiency of the hydrogen evolution electrode is improved.

The utility model provides a nickel base alloy welding device with a water cooling structure. The nickel base alloy welding device with the water cooling structure comprises a device main body, a motor box is fixedly connected to the device main body, a motor base is fixedly connected to the motor box, a rotating motor is installed on the motor base, a driving wheel is arranged on the rotating motor, a belt is arranged on the driving wheel, and the water cooling structure is arranged on the device main body. A driven rod is rotationally connected to the device body, a grinding block is fixedly connected to the driven rod, a driven wheel is fixedly connected to the driven rod, a first fixing block is fixedly connected to the driving wheel, a second fixing block is fixedly connected to the device body, and a shielding scraper is fixedly connected to the device body. The nickel base alloy welding device with the water cooling structure has the effect of prolonging the service life of alloy.

Prechamber device (1) for an internal combustion engine, comprising a prechamber (3) and several transfer openings (4) through which the prechamber (3) can be fluidically connected to a combustion chamber (2) of the internal combustion engine and a fuel-air mixture can be introduced from the combustion chamber (2) into the prechamber (3), wherein the respective transfer opening (4) is specifically rounded at its respective combustion chamber-side end edge (6) and / or prechamber-side end edge (5), characterized in that - the pre-chamber (3) is partially bounded by a housing element (10) of the pre-chamber device (1) and partially by a cap (9) of the pre-chamber device (1) formed separately from the housing element (10) and connected to the housing element (10), wherein the cap (9) is made of a nickel-based alloy; - the respective overflow opening (4) is fully formed in the cap (9); and - the respective overflow opening (4) is specifically rounded at its respective combustion chamber-side end edge (6) and / or pre-chamber-side end edge (5) by hydro-erosive machining.