13 results about "Thermal deformation" patented technology

The invention relates to a 3D printing modified polyamino acid material. Raw materials for preparing the 3D printing modified polyamino acid material comprise, by weight, 75-85 parts of polyamino acid, 1-5 parts of a chain extender, 1-5 parts of a crosslinking agent, 0.5-1 part of a nucleating agent, 5-10 parts of a toughening agent, 0.1-0.5 parts of a thermal stabilizer, 1-5 parts of a reinforcing agent and 0.3-0.8 parts of an antioxidant. A low temperature crushing mixing reaction technology is used to modify polyamino acid, so the toughness, the impact strength and the thermal deformation temperature of the modified polyamino acid are greatly improved, thereby the polyamino acid material has a good application prospect in 3D printing.

In the case of attaching the resin panel member (2) to the vehicle body member (6), while the vehicle body member side fastener (21) is provided on the above vehicle body member (6), the above resin panel member (2) A long hole (22) along a direction allowing thermal deformation of the resin panel member (2) is formed at a portion of the plate member (2) corresponding to the fastener (21) on the side of the vehicle body member, and the bolt shaft portion (23a), the first large-diameter portion (23b) that is arranged at one end of the bolt shaft portion (23a) and can be inserted into the long hole (22) and the above-mentioned bolt shaft portion (23a) of the first large-diameter portion (23b) It is provided on the opposite end surface, and the above-mentioned attachment is performed using the fastening member (23) having the fastening part (23c) on the side of the fastening part that can be screwed into the fastening part (21) on the side of the vehicle body part.

The invention discloses a low-Nd anisotropic Nd2Fe14B/alpha-Fe composite nanocrystalline magnet and a preparation method thereof. The nanocrystalline magnet of the low-Nd anisotropic Nd2Fe14B/alpha-Fe composite nanocrystalline magnet is compounded from two phases of Nd2Fe14B and alpha-Fe, the content of the alpha-Fe phase in the nanocrystalline magnet is between 20 and 40 percent, and the Nd2Fe14B phase grows in grain orientation and has a [001] crystallographic texture in the compressive stress direction; and the composite nanocrystalline magnet has obvious magnetic anisotropy in the directions parallel and vertical to the compressive stress direction. The preparation method comprises the following steps: applying a method of performing thermal deformation on a low-Nd noncrystal NdxFe94-xB6 (x is more than or equal to 6 and is less than or equal to 10) alloy, and using a uniaxial compressive stress to control the nucleation and the growth of a nanocrystalline in a noncrystal substrate to make the Nd2Fe14B phase grow in the grain orientation so as to prepare the low-Nd anisotropic Nd2Fe14B/alpha-Fe composite nanocrystalline magnet. The increase of the content of a soft magnetism phase of the alpha-Fe phase in the magnet not only can reduce the production cost, but also can improve the strength and the corrosion resistance of the magnet.

A component assembly that can be easily built in a main substrate with high accuracy is formed such that a glass transition temperature of a built-in-component layer of an assembly substrate in which multiple capacitors are embedded is higher than a glass transition temperature of a built-in-component layer of a built-in-component substrate. Thus, thermal deformation of the component assembly is prevented when the built-in-component substrate in which the component assembly is built is heated during reflow, for example. The component assembly can thus be highly accurately built in the built-in-component substrate. Moreover, when the component assembly in which the multiple capacitors are embedded is built in the built-in-component substrate, electrode pads of the component assembly in which the multiple capacitors are embedded can be electrically connected to wiring layers of the built-in-component substrate by soldering despite the variation in height among the capacitors.

The invention discloses a grain boundary diffusion method suitable for a large rare earth permanent magnet material. A spark plasma sintering technology is used for carrying out grain boundary diffusion treatment on a magnet, and the comprehensive magnetic performance of the magnet is improved. The method comprises the following steps: (1) preparing an initial magnet through a sintering or hot pressing or thermal deformation process; (2) loading a grain boundary diffusion alloy source on the surface of the magnet through magnetron sputtering, electroplating, chemical vapor deposition, physicalvapor deposition, direct physical contact or bonding by a binder; and (3) putting the loaded initial magnet into a discharge plasma device, and carrying out grain boundary diffusion by using discharge plasma heating to raise the temperature, thereby obtaining the final magnet. By controlling the current, the plasma, the pressure and the like in the spark plasma sintering process, the diffusion coefficient of elements is remarkably increased, and the diffusion depth of the elements is increased. According to the grain boundary diffusion rare earth permanent magnet material prepared by the method, the magnetic performance is increased more remarkably, the grain boundary diffusion process can be suitable for large magnets and is not limited by the thickness of the magnets, and the industrialproduction and market requirements are met.

The invention relates to the technical field of extrusion and processing of plastic products, in particular to a color bending-resistant co-extruded section bar reflecting infrared rays, which comprises, by weight part, 100 parts of acrylic acid-styrene-acrylonitrile copolymer or polymethylmethacrylate, 0-110 parts of polyvinyl chloride (PVC) and 5-16 parts of stabilizing agent. A color bending-resistant co-extruded granular material reflecting the infrared rays is obtained by adding a dry mixed potassium titanate crystal whisker material treated by a silane coupling agent, the color bending-resistant co-extruded granular material reflecting the infrared rays and a PVC dry material with a processing agent are prepared into the color bending-resistant co-extruded section bar reflecting the infrared rays through a special co-extruding mold, and color co-extruded doors and windows made of the color bending-resistant co-extruded section bars reflecting the infrared rays have the functions of reflecting the infrared rays, insulating heat and strengthening resistance to deformation. Under the action of the infrared rays, the thermal deformation degree of the color co-extruded doors and windows is reduced, the service life of the color co-extruded doors and windows is prolonged, and the reduction of the sealing performance of the color co-extruded doors and windows is avoided.

The invention discloses an epoxy monomer based on an acetal structure as well as a preparation method and application thereof. The structural formula of the epoxy monomer based on the acetal structureis shown as a formula (I), wherein the R1 and R2 are respectively at least independently selected from H or OCH3, and R3 is at least selected from H, CH3 or CH2CH3. The preparation method of the epoxy monomer is simple in process and easy for industrial production; the prepared product has more excellent mechanical properties and heat resistance, has higher glass-transition temperature, thermal deformation temperature and degradability, can be applied to the fields of degradable plastics, coatings, adhesives, aerospace and the like, and has economic practicability and industrial application prospects.

The invention provides a protective guard. The protective guard comprises an anti-collision barrel and a guardrail plate connected with the anti-collision barrel through bolts, wherein the guardrail plate is prepared from the following materials in percentage by mass: 30% of resin, 45% of yarns, 10% of a calcium powder, 3% of color paste, 0.3% of mold-releasing oil, 0.3% of tert-butyl ester and 11.4% of alkali-free felt. The guardrail plate of the protective guard is high in strength, low in deformation rate, high in thermal deformation temperature and high in corrosion resistance. Besides, the protective guard adopts a new structural connection mode, and compared with a traditional protective device, the protective guard is more convenient to install, high in safety and more attractive.