35results about How to "Sufficient binding strength" patented technology

The invention relates to an upward forming method of thermal dip-coating copper covered steel. The upward forming method mainly comprises the following steps: enabling a preheated steel bar to enter the bottom of a crucible; sequentially dipping and coating the preheated steel bar in copper water of the crucible; and vertically pulling out the preheated steel bar from the upper part of the crucible. An upward forming device corresponding to the method comprises a copper water pretreatment device, a steel bar pretreatment device, the crucible, a winding device, a graphite tube, an upper graphite tube, a cooling tube, a lifting tube and a lifting device. The method mainly changes the prior horizontal forming into vertical upward forming to equalize the surface periphery temperature and the surface heat absorption capacity of the steel bar, thoroughly solves the problem of eccentric copper coating, controls the preheating temperature, the copper water temperature, the dip-coating distance and the dip-coating speed of the steel bar in suitable ranges, not only enables a copper-steel interface to have enough bonding strength, but also effectively prevents phosphonium ions in the steel bar from entering to pollute the copper water, enables the copper covered steel product to have the advantages of high strength, high conductivity, low cost, and the like and is most suitable for being used as overhead conductors and lightning conductors of a power network.

The invention belongs to the technical field of metal surface spray and provides a method for spraying and preparing a high temperature sulfidation resistant alloy layer on the surface of cast iron. The method includes the following steps of: (1) pre-treating the surface of a cast iron workpiece before spraying, and exposing the clean and coarsening metal surface of the workpiece; (2) adopting a subsonic speed oxyacetylene flame hot spray method to spray prime coat on the surface of the cast iron workpiece, wherein the prime coat adopts nickel aluminum compound powder; and (3) adopting a high speed arc wire spray method to spray an FeCrAl working layer on the surface of the cast iron workpiece. The technique of the invention is characterized by simple and convenient operation and strong applicability, can save high alloy material and is convenient for promotion and use. Compared with the overall high temperature sulfidation resistant material, the cast iron part prepared by means of the method is low in cost, has excellent resistance to high temperature sulfidation and favorable wearing resistance, and can strikingly improve the service life of the cast iron part in a high temperature sulfidation environment.

The invention provides metal slurry, which comprises metal powder, glass powder and an organic carrier, wherein a mass ratio of the metal powder to the glass powder to the organic carrier is 100:(5-10):(10-20); the metal powder comprises Ni powder, Cr powder and NiCr20 alloy powder; the median particle size of the Ni powder and the median particle size of the Cr powder are both smaller than 10 microns, and the median particle size of the NiCr20 alloy powder ranges from 15 microns to 50 microns; and the chemical formula of the glass powder is B-Si-Al-M2O-NO, M is alkali metal, and N is alkaline earth metal. The invention further provides a heating circuit made of the metal slurry, an atomizing core comprising porous ceramic and the heating circuit, a preparation method of the atomizing core and an electronic cigarette. The bonding strength between the heating circuit prepared from the metal slurry and the porous ceramic is high, the strength of the porous ceramic is not affected, the assembly and use requirements of the atomizing core of the electronic cigarette can be met, and the service life of the electronic cigarette is prolonged.

The invention discloses a manufacturing technology of a high-performance composite plate. The manufacturing technology comprises the steps that corrosion resistant metal materials are selected and smelted, and a proper amount of a titanium carbide alloy is added in the smelting process; a pipe blank is formed by smelted metal materials through centrifugal complex casting and subjected to heat treatment, the inner and outer surfaces of the pipe blank are cleaned through a turning lathe and a boring lathe, and the pipe blank is equally cut into three arc blocks through an ion cutting machine; the cut arc blocks are subjected to forging and pressing, leveling and heat treatment, an alloy plate is trimmed through a milling machine, the inner and outer surfaces of the alloy plate is cleaned through the turning lathe and the boring lathe, and the alloy plate with titanium carbide accumulated on one side is manufactured; and a low-carbon steel plate or a stainless steel plate is selected, cut and subjected to surface treatment, the low-carbon steel plate or the stainless steel plate and the manufactured alloy plate are buckled together, a double-metal welding body is heated and forged repetitively, and a baseplate and the alloy plate are firmly pressed together to manufacture the high-performance composite plate. According to the manufacturing technology, the high-performance composite plate is high in corrosion resistance and good in welding performance and toughness and has enough bonding strength, heat treatment distortion is greatly improved, and the manufacturing technology is widely applied to rolling mill slide plates, heat resistant and corrosion resistant guide plates and the like.

The invention provides a soldering method of a tantalum target material and a copper back plate. The soldering method comprises the following steps that (1) the warping degree of the tantalum target material is corrected to make the flatness of the target material less than or equal to 0.2 mm; (2) welding surfaces of the tantalum target material and the copper back plate are respectively and independently subjected to surface sandblasting treatment; (3) the welding surfaces of the tantalum target material and the copper back plate are respectively and independently subjected to nickel plated treatment; and (4) after the nickel plated treatment, the tantalum target material and the copper back plate are subjected to soldering connection to complete soldering welding connection. According tothe soldering method, the roughness of the welding surfaces is improved through the sandblasting treatment, and the tantalum target material and the copper back plate are effectively combined throughthe nickel plated treatment, and thus the welding effect of the tantalum target material and the copper back plate is improved.

The invention discloses a method for brazing CBN (Cubic Boron Nitride) abrasive particles at a low temperature and belongs to the technical field of superhard abrasive material tool manufacture. The method comprises the following steps: adopting acetone to clean CBN abrasive particles ultrasonically and drying the CBN abrasive particles, sequentially paving and spraying Sn-Cu-Ti alloy powder and CBN abrasive particles on a polished tool substrate; placing the tool substrate in a quartz tube and vacuumizing; then, moving the tool substrate to a heating furnace and heating the tool substrate for5-60 minutes at 350-700 DEG C; and finally, cooling the tool substrate to the room temperature under the vacuumizing state. The method has the following technological advantages: on the premise thatbrazing filler metal and the CBN abrasive particles are ensured to generate chemical bonding and the abrasive particles have sufficient bonding strength, the brazing temperature is greatly reduced toreduce loss of the metal material performance, size and shape of the tool substrate and the residual thermal stress at the bonding interface of the CBN abrasive particles and brazing filler metal is reduced.

The present invention provides a pelvic prosthesis. The pelvic prosthesis comprises an acetabular cup, an ilium support and a pubis plate are respectively arranged on the acetabular cup, an ilium support connecting plate is arranged on the ilium support, and tantalum coating porous bone trabecular interfaces are arranged at a contact part of the ilium support connecting plate and an ilium, a contact part of the pubis plate and a pubis, and a contact part of the ilium support and human body; a shape of the ilium support is irregular polygon, a plurality of locking long nail holes are arranged in the ilium support, axial directions of the plurality of the locking long nail holes are different, and locking long nails penetrate through the locking long nail holes of the ilium support to be connected with sacrum or lumbar vertebrae. The tantalum coating porous bone trabecular interfaces on the ilium support can ensure a sufficient bonding strength of the prosthesis and a host bone interface, improve long-term stability of the prosthesis in vivo and realize deep fusion of the prosthesis and a host bone tissue; the tantalum coating porous bone trabecular interfaces of the ilium support connecting plate increase stability and safety of the prosthesis and can play roles in mechanical support and bone ingrowth; and the locking long nail holes increase the stability of the prosthesis andreduce mounting difficulty of the prosthesis..

The invention relates to a preparation method for a bimetallic composite internal anticorrosive pipe. A bimetallic pipe body is composed of a lining pipe and a base pipe, the base pipe is made of different types of carbon steel according to different purposes, and the lining pipe is an alloy pipe or a metal pipe with corrosion resistance; in the molding process of the bimetallic pipe, different composite methods and lining pipe molding processes are adopted for different base pipe diameters, and the lining pipe is made to be combined to the inner wall of the base pipe; and the molding processof the lining pipe is that the lining pipe is molded by straight seam welding when the base pipe DN is less than 600 mm, and the lining pipe is molded by circular seam splicing when the base pipe DN is larger than or equal to 600 mm. According to the preparation method for the bimetallic composite internal anticorrosive pipe, different composite strategies are adopted for different pipe diameters,a combination process of hydraulic composite and metallurgy is adopted in producing the bimetallic composite internal anticorrosive pipes of larger diameters, the fact that sufficient combining strength exists between the base pipe and the lining pipe can be guaranteed, the product property is excellent, conditions for mass production are provided, and the preparation method for the bimetallic composite internal anticorrosive pipe has high application value and wide application prospects.

The invention relates to a motor rotor which comprises a hub, a permanent magnet and a mandrel; wherein the hub is provided with an inner surface and an outer surface; an assembly hole is formed at the center of the inner surface of the hub; the permanent magnet is arranged on the inner surface of the hub in an encircling manner; the mandrel is provided with two ends, one end is a binding end, and the binding end is fixed in the assembly hole of the hub and is provided with a binding piece; the binding piece radially extends to the peripheral surface of the mandrel and is embedded in the hub. Therefore, the binding piece can radially extend and the binding area between the hub and the mandrel is increased, so that the excellent binding strength is provided, and simultaneously, the whole motor has miniaturized or thin design space.

The invention provides a straw wall material brick and a making method thereof. The straw wall material brick comprises a first brick body and a second brick body, wherein the first brick body and the second brick body are symmetrically arranged to form the straw wall material brick. The core portions of the first brick body and the second brick body are compacted straw bodies, and the outer sides of the compacted straw bodies are coated with a waterproof agent and a fire retardant. By the adoption of the straw wall material brick, rapid erection of a simple building or a building having lower usage requirements or a temporary building can be achieved. In addition, semi-circular grooves and semi-circular protrusions are arranged at the connecting positions of the straw wall material bricks, a structure formed after combination is firm and stable, and the brick bodies can have enough combination strength. Furthermore, the inner cores are the compacted straw bodies, and the overall self weight of the building is greatly lightened under the situation that a necessary supporting force is provided.

The invention discloses a torsion mechanism for binding. The torsion mechanism for binding comprises a torsion device and a cutting device. The torsion device comprises a motor, a rotating plate, a rotating shaft, a snap spring and a compression spring, wherein the motor and the rotating plate are connected with the rotating shaft, the snap spring and the compression spring are installed on the rotating shaft, the torsion device rotates to enable a binding wire to tightly bundle reinforcing steel bars, a torsion mechanism is lifted up, the snap spring and the compression spring prevent the rotating plate from separating from the rotating shaft in the axial direction, the rotating plate is separated from the rotating shaft by a certain distance, and the tightly-bundled binding wire is separated from the torsion device; and the cutting device comprises a wire outlet plate, a wire outlet side plate, a cutter, a cutter baffle and a cutting column and is used for cutting the binding wire. The torsion mechanism solves the problem that the binding wire bundling strength is poor and the process is complicated in the process of bundling the reinforcing steel bars. While the sufficient binding wire bundling strength is ensured, the number of circles of the binding wire for bundling the reinforcing steel bars is reduced, the binding action is simplified, and the binding efficiency is improved.

The invention discloses a high-resistance resistor magnetron sputtering target material and a preparation method thereof. The preparation method comprises the steps of (1) conducting burdening, specifically, burdening according to the following components: 50-57 wt% of Si, 40-42 wt% of Cr and the balance of Ni; (2) placing the graphite and magnesium oxide composite crucible in vacuum induction melting for preheating with the preheating temperature being 850 DEG C, and then putting Cr and Ni into the graphite and magnesium oxide composite crucible for further heating to 1400 DEG C; (3) preheating Si to 850 DEG C, preserving heat for 2.5-4 hours, continuously putting the Si into the graphite magnesium oxide composite crucible, and continuously heating to 2100 DEG C until the Si is completely mixed and melted; (4) reducing the temperature to 1800 DEG C to 1850 DEG C; (5) conducting casting, cooling and molding; (6) conducting machining, specifically, machining the surface of the high-resistance resistor magnetron sputtering target blank to enable the surface to be flat and smooth; and (7) welding to form a finished product of the high-resistance resistor magnetron sputtering target material. The preparation method has the advantages of high resistivity, low resistivity temperature coefficient and the like.

The invention discloses a grafting-free noninvasive colonization method for plants. The grafting-free noninvasive colonization method is characterized by comprising the following specific steps: selecting a colonization branch in a healthy growth state; selecting a metal wire at a position 5-8 cm away from the base part of the branch, and tightening the metal wire by using a vice; selecting a proper pricking point, cutting one side of a culture container, and sleeving the culture container on the branch from the notch; additionally arranging a fixing rod, and fixing the fixing rod at a position flush with the height of the culture container by using the metal wire; filling the culture container with wet nutrient soil, sealing the surface of the nutrient soil with a preservative film or a plastic bag after filling, and watering frequently to ensure that the nutrient soil is wet; after one month, the branch branches root, and cutting off from the base part of the branch to transplant. Compared with the prior art, the grafting-free noninvasive colonization method has the advantages that the steps are simple and practical, the survival rate is high, no special requirement is needed forcolonization branches, the colonization time domain is wide, colonization can be conducted in all growing seasons, the cost is low, the cost investment is greatly reduced, and popularization is convenient.