Abstract: The present disclosure provides a pulse current assisted uncanned rolling method for titanium-TiAl composite plates, including the following specific steps: 1. preparing titanium alloy sheets; 2. preparing TiAl alloy sheets; 3. uncanned lay-up; 4. pulse current assisted hot-rolling; 5. separation and subsequent processing, thus getting the titanium-TiAl composite plates. The composite plates are of good quality on the surface without oxide layer shedding, no cracks at the edges and the ends, with uniform and fine microstructures, good bonding interface and excellent mechanical properties.

Abstract: A semi-automatic adjustment device for suppressing tension fluctuations during a rolling process of an ultra-thin strip includes a semi-automatic tension regulator, a semi-automatic tuned mass damper of variable stiffness and damping, a coiler, a tension roller and a twenty-high roller system. The semi-automatic tension regulator is disposed between the coiler and the tension roller, the semi-automatic tuned mass damper of variable stiffness and damping is disposed between the tension roller and the twenty-high roller system. The semi-automatic adjustment device can be used to reduce a short-time fluctuation impact of tension during startup and shutdown of a twenty-high roll mill when the twenty-high rolling mill rolls an ultra-thin strip, improve system stability, absorb the continuous micro disturbances generated during the rolling process of the twenty-high roll mill, and achieve flexible and stable adjustment of tension during the rolling process.

Abstract: Disclosed are a continuous rolling device and method with interfacial temperature-force controllability for a seamless metal cladding pipe. The device comprises a multi-roller skew rolling mill set, an interfacial temperature-force controlled rolling mill set and a sizing and finishing mill set sequentially distributed along a rolling axis; and the interfacial temperature-force controlled rolling mill set comprises an interface temperature control module and an interface pressure control module sequentially distributed along the rolling axis, the interface pressure control module comprises two racks and a plurality of controlled rolling rollers circumferentially and evenly distributed along the rolling axis, two ends of the controlled rolling roller are respectively mounted on the two racks through corresponding screwdown apparatuses, and the interface pressure control module realizes passive driving through a spiral pushing force or a traction force.

Abstract: An anisotropic bonded magnet and a preparation method thereof are provided. By stacking magnets having different magnetic properties and/or densities, the magnets in the middle have high properties and the magnets at two ends and/or the periphery have low properties, thereby compensating for a property deviation caused by a difference in pressing densities during a pressing process, and improving the property uniformity of the magnets in an axial direction. The method solves the problem of “low in the middle and high at two ends” caused by the phenomenon of non-uniform magnetic field orientation and density along a height direction during orientation and densification.

Abstract: A preparation method of a branched polyamide copolymer with ultra-high toughness is disclosed. The preparation method includes: (1) dissolving a linear dibasic acid in a solvent A to obtain a linear dibasic acid solution, dissolving a diamine B in a solvent B to obtain a diamine solution B, and dissolving a diamine C in a solvent C to obtain a diamine solution C; (2) adding the diamine solution B to the linear dibasic acid solution to obtain an amide salt solution B; and adding the diamine solution C to the linear dibasic acid solution, and collecting a precipitate to obtain an amide salt C; and (3) mixing the amide salt solution B with the amide salt C, adding a catalyst, and conducting melt polycondensation. The prepared branched copolymer has excellent mechanical performance and is suitable for melt blending toughening, melt extrusion spinning, blow-extruded films, hot melt adhesives, and other fields.

Abstract: The present disclosure discloses an yttrium (Y)-added rare-earth permanent magnetic material and a preparation method thereof. A chemical formula of the material expressed in atomic percentage is (YxRE1-x)aFebalMbNc, wherein 0.05?x?0.4, 7?a?13, 0?b?3, 5?c?20, and the balance is Fe, namely, bal=100-a-b-c; RE represents a rare-earth element Sm, or a combination of the rare-earth element Sm and any one or more elements of Zr, Nd and Pr; M represents Co and/or Nb; and N represents nitrogen. In the preparation method, the rare-earth element Y is utilized to replace the element Sm of a samarium-iron-nitrogen material. By regulating a ratio of the element Sm to the element Y, viscosity of an alloy liquid can be reduced, and an amorphous forming ability of the material is enhanced.

Abstract: A preparation method of a reprocessable thermosetting polyesteramide (PEA) includes: (1) mixing 30 to 200 parts by weight of a liquid dicarboxylic acid and 15 to 95 parts by weight of a ?-hydroxyl-containing diamine compound, and heating for dissolution to obtain a reaction solution; (2) adding 0.05 to 0.5 parts by weight of a catalyst to the reaction solution, and heating under a nitrogen atmosphere to allow a reaction at 65° C. to 100° C. for 1 h to 6 h; (3) heating a reaction system obtained in step (2) to allow a reaction at 100° C. to 180° C. for 3 h to 18 h; (4) heating a reaction system obtained in step (3) to allow a reaction at 180° C. to 240° C. for 0.5 h to 4 h; and (5) cooling a reaction system obtained in step (4) to 100° C. to 180° C. A PEA prepared by the above preparation method is further provided.

Abstract: The present disclosure relates to the field of optical technologies and provides a camera module and an endoscope. The camera module includes: a connecting base, including a first connecting member and a first circuit board; wherein the first circuit board is installed in the first connecting member; and a camera, including a housing, a second circuit board, a light source assembly, and a lens assembly; wherein the second circuit board, the light source assembly, and the lens assembly are respectively installed in the housing; the housing is removably connected to the first connecting member; the first circuit board and the second circuit board are electrically connected to each other.

Abstract: An anisotropic bonded magnet and a preparation method thereof are provided. By stacking magnets having different magnetic properties and/or densities, the magnets in the middle have high properties and the magnets at two ends and/or the periphery have low properties, thereby compensating for a property deviation caused by a difference in pressing densities during a pressing process, and improving the property uniformity of the magnets in an axial direction. The method solves the problem of “low in the middle and high at two ends” caused by the phenomenon of non-uniform magnetic field orientation and density along a height direction during orientation and densification.

Abstract: A method for preparing a rare earth anisotropic bonded magnetic powder, comprises the following steps: (1) preparing raw powder with RTBH as the main component, wherein, R is Nd or Pr/Nd, and T is a transition metal containing Fe; (2) adding La/Ce hydride and copper powder to the raw powder to form a mixture; (3) subjecting the mixture to atmosphere diffusion heat treatment to give the rare earth anisotropic bonded magnetic powder. The invention selects high-abundance rare earth elements La, Ce to replace Dy, Tb, Nd, Pr and other medium and heavy rare earth elements, which can achieve the same coercivity improvement effect while also significantly reducing the cost, thereby achieving efficient application of low-cost and high-abundance rare earths.

Abstract: The invention discloses an anisotropic bonded magnetic powder and a preparation method thereof. The anisotropic bonded magnetic powder has a general formula of R1R2TB, wherein R1 is a rare earth element containing Nd or PrNd, R2 is one or two of La and Ce, T is a transitional element, and B is boron. The preparation method includes the steps of smelting the master alloy to prepare ingot(s), preparing a rare earth hydride of formula R1TBHX, preparing a hydride diffusion source of formula R1R2THX, mixing, heat treating, and high-vacuum dehydrogenating, to obtain the anisotropic bonded magnetic powder. The invention uses La and Ce hydrides as the diffusion source, can save cost, remove hydrogen from the diffusion source at a lower dehydrogenation temperature, avoid crystal grain growth at a high temperature, and ensure the quality of the product.

Abstract: The invention discloses a composite rare earth anisotropic bonded magnet and a preparation method thereof. The composite rare earth anisotropic bonded magnet comprises a Nd—Fe—B magnetic powder, a Sm—Fe—N magnetic powder, a binder and an inorganic nano-dispersant. The preparation method comprises steps of preparing a Nd—Fe—B magnetic powder by a HDDR method, preparing a Sm—Fe—N magnetic powder by a powder metallurgy method, mixing the Nd—Fe—B magnetic powder, the Sm—Fe—N magnetic powder, the binder and the inorganic nano-dispersant at a specific ratio to finally obtain the composite rare earth anisotropic bonded magnet. The invention, by adding an inorganic nano-dispersant, enables the full dispersion of the fine Sm—Fe—N powder during the mixing process of the binder, the Nd—Fe—B magnetic powder and the Sm—Fe—N powder, and thus makes the fine Sm—Fe—N powder and the binder evenly coated on the surface of the anisotropic Nd—Fe—B magnetic powder.

Abstract: The present disclosure discloses an yttrium (Y)-added rare-earth permanent magnetic material and a preparation method thereof. A chemical formula of the material expressed in atomic percentage is (YxRE1-x)aFebalMbNc, wherein 0.05?x?0.4, 7?a?13, 0?b?3, 5?c?20, and the balance is Fe, namely, bal=100-a-b-c; RE represents a rare-earth element Sm, or a combination of the rare-earth element Sm and any one or more elements of Zr, Nd and Pr; M represents Co and/or Nb; and N represents nitrogen. In the preparation method, the rare-earth element Y is utilized to replace the element Sm of a samarium-iron-nitrogen material. By regulating a ratio of the element Sm to the element Y, viscosity of an alloy liquid can be reduced, and an amorphous forming ability of the material is enhanced.

Abstract: A method i for forming an epoxidized polymer is provided. The method may include mixing an epoxidized plant oil with a synthetic epoxy resin and crosslinking the epoxidized plant oil and the synthetic epoxy resin using a curing agent. The epoxidized plant oil may be formed via: converting plant oil triglycerides to fatty amide alcohols via aminolysis using primary or secondary amines, converting the fatty amide alcohols to epoxidized fatty amide alcohols, and reacting the epoxidized fatty amide alcohols with vinyl monomers to obtain epoxidized plant oil monomers.

Abstract: The present disclosure discloses a high-temperature resistant and small-diameter optical cable and a preparation method thereof. The high-temperature resistant and small-diameter optical cable is prepared by using acrylate as a coating material, using PHB/PET liquid crystal copolyester as an outer protective layer material and using an extrusion process. Compared to traditional optical cables, the novel optical cable has advantages in small diameter, low loss attenuation, good microbending property, excellent mechanical property, long one-time finished length (10 km˜26 km), long storage time, simple preparation process and wide operating temperature range.

Abstract: The present disclosure relates to a high-temperature resistant and small-diameter optical cable and a preparation method thereof. The high-temperature resistant and small-diameter optical cable is prepared by using acrylate as a coating material, using PHB/PET liquid crystal copolyester as an outer protective layer material and using an extrusion process. Compared to traditional optical cables, the high-temperature resistant and small-diameter optical cable is small in diameter, low in loss, good in microbending property, excellent in mechanical property, long in one-time finished length (10 kilometers (km)˜26 km), long in storage time, simple in preparation process, and wide in operating temperature range.

Abstract: The present disclosure discloses a high-temperature resistant and small-diameter optical cable and a preparation method thereof. The high-temperature resistant and small-diameter optical cable is prepared by using acrylate as a coating material, using PHB/PET liquid crystal copolyester as an outer protective layer material and using an extrusion process. Compared to traditional optical cables, the novel optical cable has advantages in small diameter, low loss attenuation, good microbending property, excellent mechanical property, long one-time finished length (10 km˜26 km), long storage time, simple preparation process and wide operating temperature range.

Abstract: A method i for forming an epoxidized polymer is provided. The method may include mixing an epoxidized plant oil with a synthetic epoxy resin and crosslinking the epoxidized plant oil and the synthetic epoxy resin using a curing agent. The epoxidized plant oil may be formed via: converting plant oil triglycerides to fatty amide alcohols via aminolysis using primary or secondary amines, converting the fatty amide alcohols to epoxidized fatty amide alcohols, and reacting the epoxidized fatty amide alcohols with vinyl monomers to obtain epoxidized plant oil monomers.

Abstract: A clock and data recovery (CDR) circuit employing zero-crossing linearizing (ZCL) technique. The circuit including a voltage controlled oscillator (VCO), an inject-locked divider (ILD), a variable delay unit, a linearized loop, a bang-bang loop, and a loop filter (LP). The differential clock generated by VCO passes through ILD for frequency dividing and variable delay unit to generate 8-phase clocks. Then using these clocks, the PDs over-sample the input data, followed by synchronization and logic operation to control the CPs output current pulses. These currents filtered by LP control the VCO to finish the loop. The circuit recovers 4 channel data and corresponding clocks of the input with low power broken-down and preferable jitter performance and locking property.

Abstract: A clock and data recovery (CDR) circuit employing zero-crossing linearizing (ZCL) technique. The circuit including a voltage controlled oscillator (VCO), an inject-locked divider (ILD), a variable delay unit, a linearized loop, a bang-bang loop, and a loop filter (LP). The differential clock generated by VCO passes through ILD for frequency dividing and variable delay unit to generate 8-phase clocks. Then using these clocks, the PDs over-sample the input data, followed by synchronization and logic operation to control the CPs output current pulses. These currents filtered by LP control the VCO to finish the loop. The circuit recovers 4 channel data and corresponding clocks of the input with low power broken-down and preferable jitter performance and locking property.