5results about How to "Improve thermoplasticity" patented technology

The application discloses an economical boron-containing stainless steel for hot neutron absorption, which comprises the following steps: (1) component design; (2) smelting molten steel according to the set component in a vacuum environment, applying electromagnetic stirring in a smelting process, and carrying out casting under a nitrogen protection atmosphere to obtain a casting blank; (3) homogenizing heat treatment of the casting blank for 240-720 min between Ac3 and the melting point of boride (T f ); air cooling to room temperature after discharging; (4) after removing casting defects, inclusions and slag foreign matters by grinding the casting blank after heat treatment, carrying out hot deformation and solid solution treatment; the hot deformation heating temperature and the solid solution treatment temperature are respectively T f 10-80 DEG C and 30-100 DEG C. The application is aimed at the characteristics of high cost and poor hot plasticity of the traditional boron-containing stainless steel for hot neutron absorption, reduces the use of precious metal Ni, improves the hardness of the matrix structure, enhances the deformation coordination of the matrix and boride, greatly improves the hot plasticity, and improves the hot deformation capacity of the material.

The invention provides self-repairing TPU (thermoplastic polyurethane) optical resin as well as a preparation method and application thereof. According to the self-repairing TPU optical resin disclosed by the invention, dithio diethylene glycol is deliberately selected as a cross-linking agent to introduce a dynamic disulfide bond, so that a material network is endowed with dynamic reversibility; meanwhile, a thiocarbamate bond and a dynamic metal coordination bond are introduced to a polyurethane main chain, the multi-dynamic bond action mechanism breaks through the bottleneck of low self-repairing efficiency of a single dynamic bond in the past, and on the basis of ensuring the mechanical strength performance under the normal temperature condition, the material can be effectively repaired when being subjected to microscopic damage, so that the self-repairing efficiency of the material is greatly improved. And the exchange reaction of covalent hydrogen bonds and disulfide bonds can be triggered through external stimulation, so that the self-repairing of the damaged part is realized, the anti-scraping performance of the optical element is remarkably improved, and the service life is prolonged. The TPU optical resin provided by the invention has high-efficiency self-repairing performance, is recycled and regenerated, and realizes performance balance among high refractive index, low dispersion and mechanical strength.

The invention relates to the technical field of negative electrode materials, in particular to a binary magnesium alloy negative electrode material and a preparation method and application thereof, the binary magnesium alloy negative electrode material comprises Mg and Dy, and the content of Dy is that the total content of inevitable impurity elements does not exceed the total content of the inevitable impurity elements, and the balance is Mg. The preparation method comprises the following steps: weighing raw materials according to the component proportion of the binary magnesium alloy negative electrode material, wherein the raw materials comprise pure Mg and Mg-Dy intermediate alloys; the weighed raw materials are smelted and poured, and cast ingots are obtained after air cooling solidification; and the cast ingot is sequentially subjected to solution treatment, extrusion treatment, rolling treatment and annealing treatment, and the binary magnesium alloy negative electrode material is obtained. While low cost and environmental friendliness are maintained, excellent cycling stability and low overpotential are achieved.

The application belongs to the technical field of thermoplastic polyester imides, and particularly relates to a biphenyl-bridged thermoplastic polyester imide, a preparation method thereof, a biphenyl-bridged thermoplastic polyester imide film and application. The biphenyl-bridged thermoplastic polyester imide is polymerized from biphenyl diphenylate-3,3',4,4'-tetracarboxylic dianhydride, 3,3',4,4',-biphenyl tetracarboxylic dianhydride and 2-(4-aminobenzoate)-5-aminobiphenyl. The biphenyl-bridged thermoplastic polyester imide provided by the application has a linear thermal expansion coefficient close to that of copper foil, and excellent thermoplasticity, high-temperature dimensional stability and dielectric properties.

This invention belongs to the field of alloy processing technology, specifically relating to a method for forming titanium alloy bars with increased Nb, Ti, and Al content in the matrix. The method involves melting an ingot, controlling the following components: P ≤ 0.015%, S ≤ 0.015%, Si ≤ 0.2%, Mn ≤ 0.2%, 5.2% ≤ Nb + Ta ≤ 5.5%, and 1.5% ≤ Ti + Al ≤ 1.8%. After forging, the ingot is heat-treated at an initial temperature ≤ 500℃, then heated to 580–620℃. The ingot is then machined, with roughing speeds of 50–60 r / min and finishing speeds of 60–80 r / min. Finally, a shot-strengthening treatment is performed to obtain the titanium alloy bar. This invention, based on the control of impurity elements and compositional segregation during the melting process, coupled with stress-relieving heat treatment after forging, low-stress cutting, and surface strengthening treatment, achieves tensile strength and yield strength that are more than 100 MPa higher than conventional standards.