3results about How to "Improve plastic processing performance" patented technology

This invention discloses a highly wear-resistant and corrosion-resistant multi-principal element alloy and its preparation method, belonging to the field of metallic material preparation technology. It includes four main alloying elements (Al, Cr, Fe, and Ni) and a dopant element (Mn). The chemical composition of the multi-principal element alloy satisfies the general formula Al... a Cr b Fe c Ni d Mn e Where a is the atomic percentage of Al, b is the atomic percentage of Cr, c is the atomic percentage of Fe, d is the atomic percentage of Ni, and e is the atomic percentage of Mn, with the sum of the atomic percentages of each element being 100%. This invention regulates the phase, microstructure, and elemental distribution of the alloy through Mn doping, resulting in an alloy that possesses high hardness, excellent corrosion resistance, and corrosion wear resistance, as well as good plastic processing performance. The supporting preparation method is simple, with controllable parameters and readily available raw materials, making it suitable for large-scale industrial production. It can be widely used in key structural components of marine engineering equipment and other equipment operating under harsh corrosion-wear coupling conditions.

The invention belongs to the technical field of bamboo processing and modification, and particularly relates to a method for softening bamboo through cooperation of a metal ion-based eutectic solvent and high-temperature steam based on an in-situ modification mechanism. The method comprises the following steps: preparing a metal ion-based eutectic solvent (MDES) taking metal salt as a hydrogen bond acceptor; the bamboo wood is placed in the solvent to be soaked, and the solvent permeates into cell walls; and after the bamboo is taken out and surface floating liquid is wiped off, high-temperature steam treatment is directly carried out without water washing. According to the method, a crystalline region is destroyed by virtue of strong coordination of metal ions and cellulose, and meanwhile, lignin is induced to generate in-situ depolymerization by virtue of MDES in a high-temperature water vapor environment, so that a low-molecular-weight lignin segment is generated. The method solves the problems of low bamboo yield and damaged mechanical strength caused by the fact that a large amount of lignin is removed in an existing chemical softening technology, through an in-situ plasticizing mechanism, deep softening is achieved while the high yield of the bamboo is kept, the anti-bending elastic modulus is greatly reduced, and the deformation machining performance of the bamboo is improved.

This invention belongs to the field of phase change heat transfer technology, specifically relating to a bending device and method for high-temperature alloy multilayer composite pipes. In this invention, a feed guide rail is provided on the upper surface of the operating table, and a feeding mechanism is connected to the feed guide rail. The feeding mechanism can move horizontally along the feed guide rail and is equipped with a three-jaw chuck. A core-pulling mechanism inserts a mandrel into the pipe to be bent through the back side of the feeding mechanism. A vacuum chamber is provided at the other end of the operating table, and the section of the high-temperature alloy multilayer composite pipe to be bent is located in the vacuum chamber. This invention can solve the problems of poor plasticity, high springback, and crack sensitivity encountered in the bending process of high-temperature alloy multilayer composite pipes with large length-to-diameter ratios. It achieves the bending of high-temperature alloy multilayer composite pipes by using a hot bending method under stable conditions, and combines offline programming and automatic springback compensation functions to control processing accuracy, ensuring that the bent high-temperature alloy multilayer composite pipes meet product quality and technical specifications.