43results about How to "Lower deformation temperature" patented technology

The invention relates to a device for the protection of a probe joined to a wall of an aircraft. Detachable means for fastening to the wall of the protection device are sensitive to a modification of a temperature of the probe. For example, the fastening means are made of a shape memory material. A rise in temperature enables a deformation of the fastener means and a separation of the device from the wall. It is also possible to make the fastener means out of magnetostrictive or polarizable material in order to separate the protection device when the fastener means are subjected to a magnetic field. Thus, the fastener means may comprise a polarizable pin that withdraws from a housing made on a through-hole unit when it is subjected to the magnetic field generated by an electromagnet.

The invention discloses a pressing head and device for achieving densification of a spray deposition porous panel and application of the pressing head and the device. An installation end face and a working end are arranged on the pressing head, and a first pressure keeping area, a main pressing area, a prepressing area and a second pressure keeping area are arranged at the working end in the advancing direction of the pressing head. The main pressing area is a horizontal plane, the prepressing area is a slope and inclines from the main pressing area to the installation end face, and the two pressure keeping areas are used for preventing materials from flowing when densification is achieved. The four areas where smooth transition exists are arranged on the pressing head, continuous deformation of the materials is achieved in the densification process, and no fracture can be produced. Meanwhile, the invention discloses the device which is used for achieving densification and provided with the pressing head. When the panel is machined through the device, the pressing face of the main pressing area horizontally acts on a panel blank, and the pass reduction of the pressing head is larger than the inclination height of the prepressing area of the pressing head relative to the main pressing area of the pressing head. Uniformity of the microscopic structure of the panel blank can be kept in the densification process.

The invention relates to a multidirectional combined type circulating upsetting device and an upsetting method thereof, and belongs to the technical field of plastic forming. The upsetting device comprises a forward upsetting device and a lateral upsetting device. The method comprises the following steps of: in the forward upsetting process, prearranging bar blanks of which the cross sections aresquare in a forward upper die cavity of the forward upsetting device, so that the blanks are subjected to compressive plastic deformation downwards to fill in a forward lower die cavity finally; opening the forward upsetting device, taking the blanks out and putting the blanks in a lateral upper die cavity of the lateral upsetting device, with the side face facing downward, so that test samples are subjected to lateral upsetting deformation towards an lateral opening in a lateral lower die, and stopping pressing until a lateral punch presses to a parting surface of the lateral upsetting device; and repeating the steps for multiple times to perform multidirectional combined type upsetting circularly. By the upsetting device, superfine crystal blocks with uniform tissue can be prepared, so the upsetting device is used for preparing various superfine crystal materials such as pure metals, alloys, intermetallic compounds, composite materials, high polymer materials, semiconductor materials and the like.

A two-step squeeze method with equal channel angle for Mg-alloy includes such steps as designing equi-channel squeezing die set, regulating deformation speed and temp to find out the lowest temp for non-crack deformation, equichannel squeezing by 2-4 passes, lowering the deformation temp, and squeezing by 4-8 passes. Its advantage is high strength and toughness.

An optical glass includes, by weight: 1% or more and 5% or less of silicon oxide (SiO2); 15% or more and 24% or less of boron oxide (B2O3); 0.1% or more and 3% or less of aluminum oxide (Al2O3); 1% or more and 14% or less of zinc oxide (ZnO); 35% or more and 45% or less of lanthanum oxide (La2O3); 5% or more and 10% or less of yttrium oxide (Y2O3); 5% or more and 13% or less of tantalum oxide (Ta2O5); and 0.5% or more and 3% or less of lithium oxide (Li2O).

The invention belongs to the technical field of polymer materials, in particular to an ABAB type multilayer lithium-ion battery diaphragm with thermal shutdown function and a preparation method thereof. The present invention selects a polymer with a higher melting point as the A layer, selects a polymer with a lower melting point as the B layer, and combines the microlayer co-extrusion technology with the thermally induced phase separation technology to prepare an ABAB alternating multilayer lithium-ion battery diaphragm. The present invention utilizes the low melting point of the polymer B layer to obtain a lower diaphragm closed cell temperature to prevent the temperature from further increasing under high temperature conditions, and utilizes the high melting point of the polymer A layer to obtain a higher film deformation temperature to avoid the positive The short circuit caused by the contact of the negative electrode makes the diaphragm have a wider safety window and more effective thermal shutdown function; the diaphragm prepared by the present invention has uniform thickness, rich submicron porous structure, uniform and controllable pore structure, and thermal stability Excellent, with an effective thermal shutdown function, and has application prospects in the fields of lithium-ion battery separators and other fields.

The invention relates to a deformation material, prepared from the following components in parts by mass: 20-40 parts of SEEPS, 10-25 parts of white oil, 10-30 parts of a plasticizer, 15-35 parts of petroleum resin and 0.2-0.3 part of an antioxidant. According to the deformation material, the SEEPS is used as a base material, the white oil, plasticizer, petroleum resin and antioxidant are used as auxiliary materials, and through reasonable proportioning, the binding property of the deformation material can be increased, and the elasticity and intensity of the material are reduced, thereby obtaining the deformation material with a lower deformation temperature. As shown by test data, the deformation temperature of the deformation material is 70-90 DEG C, the deformation temperature is lower, so the deformation material is safer in the use process for children.

The invention provides transparent modified nylon fiber with low thermal change temperature and a preparation method thereof. The preparation method comprises the following steps: placing borax in a ball mill, grinding sufficiently, and drying to obtain micro-nano borax powder; chipping PA PACM12 type nylon, drying sufficiently in an oven, mixing well with the micro-nano borax powder, melting in a heating device to form molten liquid, and cooling at high speed to room temperature to obtain modified master batch; grinding the modified master batch into powdery particles, mixing with butyl rubber, performing melt spinning to obtain primarily spun fiber, and quickly cooling the primarily spun fiber to obtain the transparent modified nylon fiber with low thermal change temperature. The fiber prepared by the method has good physical and mechanical properties, has low processing temperature, good transparency and good processibility and is useful in garment fabric or decorations.

The invention provides a biodegradable oxygen absorbing plastic comprising a biodegradable substrate a sufficient concentration of reduced iron particles to adsorb oxygen in significant quantities and reduce the deformation temperature of the substrate substantially below the deformation temperature without iron particles present.

The invention relates to a processing and forming process of a high-strength nickel-based high-temperature alloy bar. The bar comprises the following components of, in percentage by mass, 16%-23% of Cr, 15%-20% of Co, 2.5%-4.0% of Al, 1.0%-2.5% of Ti, 0.5%-1.5% of Nb, 3.0%-7.0% of W+Mo, less than or equal to 0.5% of Si, less than or equal to 0.5% of Mn, 0.04%-0.07% of C, and the balance is Ni. Analloy is mainly in a dual phase structure of austenite and Ni3Al(gamma'), as well as M23C6 type carbides distributed discontinuously at a grain boundary. The alloy is prepared by adopting a vacuum smelting process, and then is forged into a bar by adopting a multi-pass small deformation mode, and finally surface turning and heat treatment are carried out on the bar. According to the process, deformation processing of the alloy with high content of W and Mo is conducted, and the final deformation of the alloy can reach 75% or higher while the strength of the alloy is considered.

The present invention provides a novel glass material that allows the production of a glass product having both excellent chemical durability and high precision by a press molding method. Specifically, the present invention provides a glass for press molding, comprising 38% to 45% by weight of SiO2, 18% to 27% by weight of B2O3, 16% to 25% by weight of Al2O3, 2% to 12% by weight of ZnO, no more than 3% by weight of MgO, no more than 3% by weight of CaO, no more than 3% by weight of BaO, 13% to 18% by weight of Li2O, no more than 3% by weight of K2O, and no more than 2% by weight of Na2O; wherein the glass has a deformation temperature of 520° C. or lower; and the glass has a water resistance of grade 2 or higher as measured according to the Japanese Optical Glass Industrial Standard method for measuring the chemical durability of an optical glass.

A transfer paper for transferring pattern is sequentially composed of substrate paper, adhesive layer, resin film layer, bottom ink layer, pattern layer and protecting oil layer. The resin film layer contains polyester resin or alkyd resin, cellulose resin, epoxy resin, solvent and assistant in a certain proportion.