29 results about "Cupronickel" patented technology

The invention belongs to the technical field of design and preparation of copper alloy materials, particularly relates to a lightweight cupronickel material and a preparation method thereof, and designs and prepares cupronickel of a new alloy system, namely the lightweight cupronickel material. The density of the light cupronickel material is 6.08 g / cm < 3 >-6.20 g / cm < 3 >, and compared with existing copper-nickel alloy cupronickel, the density is reduced by 31.5%, so that the mass of the cupronickel material with the same volume is reduced by about 1 / 3, and the light weight of the cupronickel material is achieved. The light cupronickel material can be provided for the fields of aviation, spaceflight, weapons and new energy vehicles, the specific gravity of cupronickel parts is effectively reduced, and the light weight of the cupronickel parts is achieved.

The invention discloses a bright annealing process for a copper alloy wire. The bright annealing process comprises the following steps: coating the surface of the copper alloy wire with a composite solid lubricant; the heating / cooling rate of a preheating zone (200-350 DEG C), the heating / cooling rate of a main annealing zone (450-650 DEG C) and the heating / cooling rate of a slow cooling zone (300-450 DEG C) are smaller than or equal to 15 DEG C / s; and an atomized anti-oxidation liquid film is applied to an outlet of the slow cooling area. According to the bright annealing process for the copper alloy wire, the lubricant with specific components is decomposed at a high temperature to form an in-situ protection layer, generation of oxide skin is inhibited in combination with gradient temperature control, and a bright surface with the surface roughness Ra smaller than or equal to 0.2 micron can be achieved without introducing hydrogen or nitrogen. The cost is reduced by more than 40%, and the method is suitable for easily-oxidized copper alloys such as tin-phosphor bronze and cupronickel.

The application provides a laser pulse processing method for improving corrosion resistance of white copper alloy and the white copper alloy, and relates to the technical field of material engineering. The laser pulse processing method for improving corrosion resistance of white copper alloy comprises the following steps: performing surface cleaning on the white copper alloy, then heating the white copper alloy by using a laser heater, and rapidly cooling the white copper alloy by using a cooling medium. According to the laser pulse processing method, the metal with a thickness of 1-10 microns on the surface of the white copper alloy is rapidly melted under the non-contact heating action of the laser, and then rapidly cooled under the action of low-temperature inert gas, so that an amorphous layer with a thickness of 1-10 microns is formed. The amorphous layer can protect the surface of the alloy and hinder the penetration of ions in the environment on one hand, and the amorphous layer is easy to be passivated to form a dense passivation layer, thereby improving the corrosion resistance of the alloy.

The invention discloses a wall thickness difference cupronickel and beryllium copper foil transition welding method for a CT bulb tube. The method comprises the following steps that S1, materials are pretreated; s2, assembling is conducted, specifically, a copper foil sheet is placed at a ray window in the side wall of the cupronickel tube shell, the inner side and the outer side of the copper foil sheet are both coated with welding flux, a beryllium sheet is placed on the outer side of the copper foil sheet, the beryllium sheet and the copper foil sheet are the same in size and radian, a welding tool is placed on the outer side of the beryllium sheet to fasten the copper foil sheet and the beryllium sheet, and assembling of a to-be-welded assembly is completed; and S3, welding. Through high thermal conductivity and low yield strength of the copper foil, uniform distribution of heat and stress buffering are realized, on one hand, excessive heat gathered by thin-wall cupronickel can be quickly conducted to thick-wall cupronickel, and overall heat distribution is balanced through the heat storage capacity of the thick wall; and on the other hand, the uniform thermal conductivity of the copper foil can reduce the local temperature difference of a welding seam area, micro cracks or air holes generated due to uneven thermal expansion and cold contraction are avoided, and the welding air tightness is improved fundamentally.

The invention discloses a corrosion inhibitor for improving the corrosion resistance of cupronickel, and the corrosion inhibitor is prepared from the following components: 1-3g / L of quaternary ammonium salt, 2-5g / L of polyaspartic acid derivative, 8-15g / L of benzotriazole, 0.1-0.6 g / L of dispersing agent and a solvent, and the content of each component is as follows: 1-3g / L of quaternary ammonium salt, 2-5g / L of polyaspartic acid derivative, 8-15g / L of benzotriazole and 0.1-0.6 g / L of dispersing agent. The corrosion inhibitor is a composite corrosion inhibitor with quaternary ammonium salt, a polyaspartic acid derivative and benzotriazole as corrosion inhibition components, and the three corrosion inhibition components are combined according to a specific ratio and can achieve synergistic interaction in the aspect of metal corrosion prevention. The corrosion inhibitor is used for corrosion prevention of cupronickel and has an excellent corrosion inhibition effect.

The invention provides a laser pulse treatment method for improving corrosion resistance of a cupronickel alloy and the cupronickel alloy, and relates to the technical field of material engineering. The laser pulse treatment method for improving the corrosion resistance of the cupronickel alloy comprises the steps that the surface of the cupronickel alloy is cleaned, then a laser heater is adopted for heating, and then a cooling medium is adopted for rapid cooling. According to the laser pulse treatment method provided by the invention, the metal with the thickness of 1-10 microns on the surface of the cupronickel alloy is rapidly molten under the non-contact heating action of the laser, and then is rapidly cooled under the action of the low-temperature inert gas, so that the amorphous layer with the thickness of 1-10 microns is formed. On one hand, the amorphous layer can protect the surface of the alloy and prevent ions in the environment from penetrating and entering, and on the other hand, the amorphous layer is easy to passivate to form a compact passivation layer, so that the corrosion resistance of the alloy is improved.

The invention discloses a preparation method and application of a copper-tin composite electrode material based on waste cupronickel, and belongs to the field of preparation of copper-based composite materials recovered from waste cupronickel and electrochemical detection of glucose. A waste cupronickel sulfuric acid solution is used as a copper metal precursor, a silver wire is used as a cathode, and a waste cupronickel sulfuric acid solution added with tin oxide powder is used as an electrolyte; the preparation method comprises the following steps: synthesizing a copper-coated tin oxide composite material on a silver wire by taking a tin oxide as a cathode and a waste white copper sheet as an anode through an electrochemical composite electrodeposition process, and carrying out low-temperature calcination on the copper-coated tin oxide composite material in argon-hydrogen mixed gas to obtain the copper-tin composite electrode material. The copper-tin composite electrode material prepared through the method has good electrochemical performance, the preparation process is simple, and application of the copper-tin composite material in the field of electrochemical glucose sensors can be promoted.

The invention relates to the technical field of detection of copper-steel composite materials, and discloses a method for detecting the mass ratio of coating metal in a copper-steel composite material. The method comprises the following steps: preparing the copper-steel composite material into a chip-shaped sample or a sheet-shaped sample; putting the sample into a beaker which is weighed in advance, adding a copper dissolving agent solution, and stirring under a water bath heating condition until the coating is completely dissolved; a new copper dissolving agent, deionized water and absolute ethyl alcohol are used for sequentially cleaning the steel base body and drying the steel base body; calculating the mass ratio of the coating metal according to the mass difference before and after the sample is dissolved; according to the method, a direct dissolving-weighing method is adopted, complex step-by-step detection is simplified into a single process, and the method has the advantages of being easy to operate, safe, environmentally friendly, accurate and reliable and is suitable for detection of various copper-based coating materials including pure copper, brass, bronze, cupronickel and the like, and a practical detection scheme is provided for quality control of copper-steel composite materials.

This invention discloses a method for removing internal inclusions in complex copper alloys produced by centrifugal casting, relating to the field of aluminum cupronickel alloy casting technology. The specific steps are as follows: S1, alloy melting: raw materials are added to a melting furnace according to the copper alloy composition ratio and heated to melt, with the melting temperature controlled at 1290–1380℃; slag removal and refining are performed during the melting process to remove oxide inclusions and gases from the melt; after the melt composition is homogeneous, it is kept at a constant temperature and allowed to stand, and the alloy temperature is adjusted to 1150–1220℃ before pouring; S2, mold preheating: the metal mold is preheated to 120–200℃. This invention introduces pouring angle control on the basis of traditional centrifugal casting process parameters, constructing a multi-parameter collaborative control mechanism of "rotation speed—temperature—time—angle," which can effectively suppress liquid surface fluctuations and turbulence during the filling process, reducing the probability of gas entrapment and inclusion defects; meeting the engineering application requirements of large-size, high-performance aluminum cupronickel alloy rings.

The invention discloses a surface treatment method for improving the antifouling performance of the inner surface of an underwater environment connector. The invention particularly relates to a surface treatment method for improving the antifouling performance of the inner surface of an underwater connector. According to the electroplating copper layer and the electroplating nickel layer designed by the invention, cupronickel components appear on the nickel-plated layer in cooperation with heat treatment, so that the antifouling performance of the inner surface is improved.

The application discloses a cupronickel rust removal and passivation solution, a cleaning method and a shell-and-tube heat exchanger. The cupronickel rust removal and passivation solution is composed of 8-15% of inorganic acid, 0.1-0.5% of corrosion inhibitor and passivation agent (consisting of copper alloy corrosion inhibitor and black metal corrosion inhibitor) and the rest of B-grade water. After the cupronickel rust removal and passivation solution is circulated for 90-120 minutes, a uniform passivation film can be formed on the surface of BFe1011 or BFe3011 cupronickel, and the corrosion rate of the base material and the weld is less than 0.01 mm / a. The application also provides a corresponding pickling and passivation method, which comprises the steps of circulation treatment, displacement rinsing and drying and inspection. The problems of high corrosion rate, poor passivation film quality and lack of heterogeneous metal protection in the traditional pickling method are solved, and efficient and low-corrosion maintenance is realized.

The invention discloses a copper-nickel-zinc ternary composite electrode, a preparation method of the copper-nickel-zinc ternary composite electrode and application of the copper-nickel-zinc ternary composite electrode in electrocatalytic nitrate reduction synthesis of ammonia, and belongs to the technical field of electrocatalytic nitrate reduction. The preparation method of the copper-nickel-zinc ternary composite electrode comprises the following steps that a cupronickel alloy sheet is scanned and engraved through pulse laser, and after scanning is finished, the copper-nickel-zinc ternary composite electrode is obtained. According to the invention, the copper-nickel-zinc ternary composite electrode is prepared by using a laser induction method, and the preparation can be completed in an atmospheric environment at normal temperature and normal pressure, so that the electrode preparation process is greatly simplified, the electrode preparation efficiency is improved, and the use of harmful reagents and solvents is effectively reduced. The copper-nickel-zinc ternary composite electrode prepared through the laser induction method is high in nitrate reduction reaction electro-catalysis activity and excellent in ammonia production performance, and therefore the copper-nickel-zinc ternary composite electrode has important application value in the field of ammonia production through nitrate reduction electro-catalysis.

The application discloses a production method of high-gloss C7451 cupronickel strip, and comprises the following steps: melting and casting, face milling, rough rolling, thick shearing, first-time shield annealing, degreasing and cleaning, pre-finishing rolling, loose coiling, second-time shield annealing, degreasing and cleaning, finishing rolling, air cushion furnace annealing, loose coiling, third-time shield annealing, degreasing and cleaning, bending and straightening, and finished product slitting; in the finishing rolling step, 2 passes of rolling are carried out, the second pass reduction is controlled to be 5-10%, the total reduction of the finishing rolling is controlled to be more than 30%, and the roughness of the finishing rolling roller is controlled to be 0.05-0.15 microns; the method can stably produce the high-gloss C7451 cupronickel strip with a tensile strength of 540-590 MPa, an elongation of 10-15%, a hardness of 160-175 HV, and a glossiness of more than 350 GU.

The invention provides a short-process preparation method for a large-diameter cupronickel seamless tube, belongs to the technical field of non-ferrous metal processing, and solves the problem that the yield of a finished product prepared by an existing large-diameter copper tube production process is relatively low. Reheating the cast ingot subjected to primary perforation, and then carrying out secondary perforation extrusion to obtain a tube blank; carrying out acid pickling, straightening, saw cutting, coping and finishing treatment on the pipe blank subjected to secondary perforation and extrusion, and rolling the finished pipe blank; and the rolled pipe blank is subjected to softening annealing treatment, stretching is conducted after annealing treatment, and annealing treatment is conducted after stretching, so that a finished product is obtained. According to the method, the problems of timeliness, grain size, eccentricity and the like existing in multi-pass diameter expansion (reduction) stretching production of the existing BFe10-1. 6-1 large-piece-weight extruded pipe blank are solved, and short-process production of the BFe10-1. 6-1 cupronickel large-diameter cupronickel seamless pipe is achieved. And the production efficiency, the grain size refinement degree and the size precision of the large-diameter cupronickel seamless tube are greatly improved.

The invention provides a method for improving the thermal cracking resistance of a cupronickel alloy without adding an alterant, which comprises the following steps: step (1), heating and melting a cupronickel alloy raw material, fishing out the cupronickel alloy raw material, and covering charcoal and surface scum; (2) the smelting temperature is increased to 1350 + / -50 DEG C, and melt is fully stirred during heating; (3) keeping the temperature at 1350 + / -50 DEG C, standing for 8-20 minutes, and fishing out the dross after the dross in the melt fully floats upwards; step (4), covering with calcined charcoal with the thickness of 10-20 cm; (5) the temperature of the melt is reduced to 1200-1310 DEG C, casting is conducted, and the casting speed is 3.5-5.1 m / h; and (6) the round ingot obtained through casting is heated to 900-1075 DEG C, extrusion is conducted, and the cupronickel alloy pipe blank is obtained. According to the method, under the condition that no alterant is added, the cupronickel alloy which is uniform in microstructure and small in grain size is successfully prepared by controlling the smelting temperature, the standing time and the casting speed, and the high-temperature heat crack resistance and the ductility of the cupronickel alloy are remarkably improved; and meanwhile, the furnace life is effectively prevented from being influenced by alterant slagging, and the equipment maintenance cost is reduced.

The invention discloses a mechanical-chemical composite polishing method for reducing the roughness of the inner wall of a cupronickel pipe. The mechanical-chemical composite polishing method comprises the following steps that (1) pollutants on the surface of the cupronickel pipe are removed through alkali washing; (2) an etching and polishing solution is introduced into the cupronickel tube subjected to alkali washing in the step (1) for polishing treatment, wherein the etching and polishing solution is turbid liquid containing nano-diamond particles, ferric trichloride and hydrochloric acid; and (3) cleaning and drying the cupronickel tube polished in the step (2). The nano diamond particles are added into the etching polishing solution, mechanical-chemical composite polishing of the inner wall of the cupronickel pipe is achieved, the smooth, clean and defect-free inner wall of the cupronickel pipe is obtained, and the etching polishing solution is suitable for simple cupronickel alloy pipes with various components and sizes, especially cupronickel pipes with large diameters and lengths. By the adoption of the method, the surface machining defects can be eliminated, the cupronickel pipe with the inner wall surface roughness Rsa being 0.1-0.23 m is obtained, the cupronickel pipe is used for treating the cupronickel pipe for maritime work equipment, the pitting corrosion resistance of the cupronickel pipe can be remarkably improved, and the requirement for the long service life of the cupronickel pipe can be met.

The invention discloses a free-cutting complex cupronickel alloy and a preparation method and application thereof. The free-cutting complex cupronickel alloy is prepared from 42 wt%-45.5 wt% of Cu, 10 wt%-13 wt% of Ni, 4 wt%-6.5 wt% of Mn, 1.5 wt%-2.5 wt% of Pb, 0.001 wt%-0.2 wt% of Al, 0.001 wt%-0.3 wt% of Sn and the balance Zn and inevitable impurities. Wherein (WNi + WMn) * 100 is larger than or equal to 16 and smaller than or equal to 18, and WNi and WMn represent the mass percentage contents of Ni and Mn in the free-cutting complex cupronickel alloy; the free-cutting complex cupronickel alloy comprises an alpha phase, a beta phase and a Pb phase, the average size of the Pb phase is smaller than or equal to 3 micrometers, and the distribution density of the Pb phase is larger than or equal to 6000 / mm < 2 >. The preparation method of the free-cutting complex cupronickel alloy comprises the technological processes of smelting, continuous casting, extrusion, multi-pass stretching and annealing, finished product stretching and low-temperature annealing. The free-cutting complex cupronickel alloy has the characteristics of excellent cutting performance, mechanical strength, stable color and luster and stress corrosion resistance.

The application relates to the technical field of laser additive manufacturing, in particular to a metal powder for laser additive manufacturing and a preparation method and application thereof. The chemical composition of the metal powder comprises Ni, Fe, Cr and Cu; the content of the Fe is 3.0-5.0 wt%, and the content of the Cr is 10.0-15.0 wt%. The application solves the technical problem of high smelting cost of the existing cupronickel material, and improves the corrosion resistance and hardness of the cupronickel material.

The invention provides a process for horizontally extruding a cupronickel pipe, and relates to the technical field of cupronickel alloy pipes, the process comprises the following steps: S1, weighing raw materials according to the components of the cupronickel pipe, adding the raw materials into a smelting furnace, and casting to obtain a solid cupronickel ingot blank; s2, the solid white copper ingot blank is cut off to obtain a cut-off ingot blank; s3, the cut ingot blank is heated and subjected to heat preservation, and a pipe blank is obtained; s4, the pipe blank is extruded on an extruding machine, and a hollow pipe blank is obtained; and S5, the hollow pipe blank is subjected to wall thickness detection, and the cupronickel pipe is obtained after the hollow pipe blank is detected to be qualified. According to the process for horizontally extruding the cupronickel pipe, the thermal deformation resistance is reduced through scientific design and control of alloy elements and impurity elements; stepless power regulation power frequency induction heating is adopted, the temperatures of the inner surface and the outer surface of a cast ingot are uniform, the fluidity of metal in the extrusion process is improved, and the problem that the wall thickness of an extruded pipe blank is not uniform is greatly solved by combining the length of a cut ingot blank and reasonable setting of extrusion parameters.

The invention provides a wide-width high-nickel cupronickel thin soft strip and a preparation method. The wide-width high-nickel cupronickel thin soft strip comprises the following components in percentage by mass: 30.0-32.0% of Ni, 0.6-1.0% of Fe, 0.6-1.0% of Mn, less than 0.03% of C, less than 0.01% of S, less than 0.01% of P, less than 0.01% of Pb, less than 0.01% of Zn, less than 0.01% of Si, less than 0.01% of Sn, less than or equal to 0.3% of impurities and the balance of Cu. The preparation method comprises the steps of component design, smelting, casting, saw cutting, primary heating, primary hot rolling, secondary heating, secondary hot rolling, surface milling, rough rolling, trimming, bell furnace annealing heat treatment, primary finish rolling, primary air cushion furnace annealing heat treatment, secondary finish rolling, secondary air cushion furnace annealing heat treatment and finished product detection. The thickness of the high-nickel cupronickel finished thin soft belt prepared by the preparation method is 0.3-1.0 mm, the width is larger than or equal to 620 mm, and the high-nickel cupronickel finished thin soft belt is stable in performance, good in extension performance, good in corrosion resistance and capable of meeting use requirements.

This invention discloses a smelting method and equipment for continuous blowing and refining of cupronickel matte. The equipment includes a furnace body, within which a blowing zone is located. A feeding port is located on one side of the blowing zone. A refining oxidation chamber is located downstream of the blowing zone, and a refining reduction chamber is located downstream of the refining oxidation chamber. A copper discharge port is located on the other side of the refining reduction chamber. A main partition wall is provided between the blowing zone and the refining oxidation chamber. A first connecting hole is formed in the main partition wall, which obliquely connects from the bottom of the blowing zone to the middle of the refining oxidation chamber. This invention completes the blowing of copper matte and the pyrometallurgical refining of crude copper in one device, achieving continuous operation.

The utility model discloses a cupronickel-tin plating layer structure taking polythiocyanate plated copper as a bottom plating layer, which comprises a zinc alloy substrate, and a polythiocyanate plated copper layer, a pyrophosphate plated copper layer, an acid copper plating layer, a cupronickel-tin plating layer and a rare earth electrolytic protective film which are sequentially prepared on the zinc alloy substrate from inside to outside. According to GB / T 5270-2005 Metal Covering Layer Electro-Deposition and Chemical Deposition Layer Adhesion Strength Test Method on Metal Matrix, the binding force of a plating layer is tested by a thermal shock method, the binding force meets the standard requirement, an acetate fog test is carried out for 60 hours according to GB / T 10125-2021 Artificial Atmosphere Corrosion Test Salt Spray Test, no corrosives are generated on the surface of a plating piece, and the plating piece has good corrosion resistance. And the prepared plating layer has good corrosion resistance.

The invention relates to the field of copper material processing, and discloses a high-nickel cupronickel wire which comprises the following preparation raw materials: 18.0%-25.0% of Ni, 18.0%-25.0% of Zn, 0.5%-1.2% of Mn, 0.05%-0.15% of Mg and the balance of Cu. A preparation method comprises the following preparation steps: S1, smelting and casting: proportioning the raw materials according to the component proportion, smelting in a protective atmosphere or vacuum, and then casting into a cast ingot or continuously casting into a casting blank; and S2, homogenizing hot working: homogenizing annealing is carried out on the cast ingot or the casting blank at 850-980 DEG C, heat preservation is carried out for 2-8 hours, then hot extrusion or hot rolling is carried out at 750-900 DEG C, and a hot working blank is obtained. According to the high-nickel cupronickel wire and the preparation method thereof, on the premise that conductivity is not excessively sacrificed, additional strength supplement and structure stabilization effects are provided, the consistency and reliability of products are greatly improved, the strict requirement that high-end precision components are extremely sensitive to material performance fluctuation is met, and the using process is more stable and reliable.

The invention relates to the technical field of auxiliary corollary equipment for metallographic detection, in particular to an automatic sample grinding device for cupronickel metallographic detection, which comprises a box body, a bottom plate, a reversing mechanism, an upper grinding mechanism, a pressing mechanism, an adjusting mechanism, a lower grinding mechanism, a connecting mechanism, a positioning mechanism and a control module, the position of a connecting mechanism is changed by arranging a lower grinding mechanism and a downward pressing mechanism capable of adjusting and keeping the adjusted position in a rectangular box body, a reversing mechanism capable of reversing is arranged to be matched with an upper grinding mechanism, the pressure and the grinding speed can be adjusted, the left side and the right side can work respectively, and the grinding efficiency is improved. According to the cupronickel sample grinding device, grinding of samples is well achieved, a good grinding effect is achieved, and the cupronickel sample grinding device further has the effects that the grinding speed of large-batch cupronickel samples is increased on the premise of stable operation, operation is easy, and the equipment use and maintenance cost is reduced.

The application relates to the field of cupronickel materials, and particularly discloses a new type of cupronickel suitable for a MIM process and a forming process thereof. Metal powder raw materials include the following mass percentages: Ni 12-18%, Sn 0.6-1.0%, mixed lanthanum-cerium-praseodymium rare earth 0.6-1.0%, Cu 80.4-86.4%, and the balance of Fe and inevitable impurities. When the material is used as a whole, the oxidation resistance of the new material in a catalytic degreasing process can be significantly improved, and the material loss in a sintering process is also greatly reduced, so that the inherent shortcomings of traditional cupronickel are overcome, and various cupronickel products with complex shapes can be perfectly produced through the MIM technology.

This invention discloses a ceramic-reinforced metal-based multi-gradient composite coating, its preparation method, and its application. The composite coating comprises a first gradient layer, a second gradient layer, and a third gradient layer, sequentially laser-clad onto the surface of a copper substrate from the inside out. The first gradient layer, by weight percentage, comprises: 80-90% aluminum-clad nickel alloy powder, 10-20% aluminum bronze, and / or cupronickel; the second gradient layer comprises: 80-85% Ni60, 7-10% graphite, 4.5-12.7% titanium-iron alloy powder and / or vanadium-iron alloy powder, and 0.3-0.5% carbon nanotubes; the third gradient layer comprises: 74.5-84% Ni60, 10-15% graphite, 5-10% titanium-iron alloy powder and / or vanadium-iron alloy powder, and 0.5-1% carbon nanotubes. This effectively suppresses the coating's cracking sensitivity and improves its hardness and wear resistance.

This application relates to the technical field of auxiliary equipment for metallographic testing, specifically an automatic grinding device for cupronickel metallographic testing samples, comprising: a housing, a base plate, a reversing mechanism, an upper grinding mechanism, a lower pressing mechanism, an adjusting mechanism, a connecting mechanism, a positioning mechanism, and a control module; the lower grinding mechanism is set inside the rectangular housing, and the lower pressing mechanism, which can be adjusted and maintain its adjusted position, enables the change of the position of the connecting mechanism; the reversible reversing mechanism, in conjunction with the upper grinding mechanism, can adjust the pressure and grinding speed, and the left and right sides can work independently, achieving better sample grinding and a better grinding effect; furthermore, this application also has the advantages of increasing the grinding speed of large batches of cupronickel samples under stable operation, simple operation, and reduced equipment use and maintenance costs.

The invention relates to the technical field of cupronickel pipe preparation, in particular to a fine-grain and homogenized cupronickel pipe and a preparation method thereof. The preparation method of the fine-grain and homogenized cupronickel tube comprises the following steps: (1) preheating a tool mold; (2) preparing raw materials; (3) vacuum melting; (4) pouring; (5) forging is conducted, specifically, the B10 cupronickel ingot obtained in the step (4) is subjected to upsetting, chambering and drawing-out, and the total forging deformation is 75-85%; (6) spinning is conducted, specifically, three-pass spinning is conducted, the deformation of the three-pass spinning is 25-35%, the deformation of the three-pass spinning is 25-35%, the deformation of the three-pass spinning is 25-35%, the deformation of the three-pass spinning is 15-25%, the total deformation of the three-pass spinning is 52-68%, and the feeding ratio of the three-pass spinning is 1-1.5 mm / r; and (7) heat treatment. According to the method, the wall thickness of the pipe blank is gradually reduced through a multi-pass power spinning process, the problems of size limitation and low yield in a traditional hot extrusion process are solved, the forming precision is improved, and the strength and toughness of the material are improved through a fine grain strengthening mechanism.

The invention relates to the technical field of titration measurement, and discloses a titration determination method of a cupronickel detection degreasing agent and a detection device thereof, the device comprises a machine body, one side of the machine body is provided with a mounting rack, the mounting rack is fixedly connected with a bearing ring, one side of the bearing ring is fixedly connected with a tray through a rack body, and the tray is provided with a material conveying bottle; a fixedly-connected infusion tube is inserted into the top of the conveying bottle, a reagent bottle is clamped in the bearing ring, the end, away from the conveying bottle, of the infusion tube is inserted into one side of the top of the reagent bottle, the infusion tube is slidably connected with the reagent bottle, a drainage tube is fixedly connected to the bottom of the reagent bottle, and a mounting ring is fixedly connected into the reagent bottle; the titration detection device for the cupronickel detection degreaser is characterized in that a mounting ring is arranged in the middle of the liquid conveying pipe, a plurality of flow guide openings which are uniformly distributed are formed in the mounting ring, a limiting rod is slidably connected into the flow guide opening close to one side of the liquid conveying pipe, and a piston is fixedly connected to the top of the limiting rod. And reagent bottles need to be taken and turned over repeatedly.