4results about How to "Realize integrated forming" patented technology

The invention discloses a microchannel heat exchanger with bottom surface secondary textures and a preparation method thereof.The microchannel heat exchanger comprises a microchannel substrate and a cover plate attached to the microchannel substrate, the microchannel substrate is provided with a plurality of microchannels, the bottom surfaces of the microchannels are provided with secondary texture structures, and the bottom surfaces of the microchannels are provided with secondary textures. The effects of disturbing flow, damaging a fluid boundary layer and increasing the heat exchange area are achieved, and the heat transfer performance is enhanced. The microchannel substrate is made of a third-generation semiconductor material, has excellent thermal conductivity and high temperature resistance, and can stably work in a high-temperature and high-pressure environment. When the microchannel heat exchanger is manufactured, the textured grinding wheel with the multiple abrasive particles distributed on the periphery moves on the to-be-machined face in the extending direction of the to-be-machined microchannels, the multiple parallel microchannels with the bottom face secondary texture structures are machined through grinding of the textured grinding wheel, the manufacturing process is simple, cost is low, and the microchannel heat exchanger is suitable for large-scale popularization and application. And integrated, high-efficiency and low-cost preparation and forming of the third-generation semiconductor material microchannel and the inner wall surface enhanced heat transfer microstructure can be realized.

The invention discloses a friction coating high-temperature-resistant high-entropy alloy coating preparation device and method, and belongs to the technical field of high-entropy alloy coating preparation. The device comprises a coating friction coating part and a feeding part, the coating friction coating part comprises a discharging barrel, a coating head, a motor, a threaded conveying rod, a material plasticizing device and a cooling protection device, and the feeding part comprises a feeding hopper and a conveying pipe and is connected with the discharging barrel through the conveying pipe. Through integrated design, the device can be used for preparing the high-entropy alloy coating after the preparation steps of device connection inspection, operation stability inspection, feeding and the like. The device can be used for preparing a single high-entropy alloy coating, a component gradient high-entropy alloy coating and a composite high-entropy alloy coating.

This invention relates to the field of fiber-reinforced composite preform weaving and forming, specifically to an automated compaction device and method for weaving and forming three-dimensional preforms. The device comprises a guide array, upper and lower perforated plates, and a bidirectional steel frame. The weaving and forming method of this invention includes the following steps: designing the guide array and preform process parameters, and arranging the guide array; raising the upper perforated plate and inserting the steel frame to fix the guide array; and compacting the fibers layer by layer in the guide array to ultimately form a three-dimensional preform. Compared to existing technologies, this invention, by inserting a bidirectional steel frame, achieves automated needle alignment and preform densification compaction during the compaction process, thereby improving the automation level of the weaving process.

This invention discloses an Al-Bi-Sn immiscible alloy and its rotational deposition solid-state additive manufacturing method, belonging to the fields of metal composite materials and solid-state additive manufacturing technology. In this invention, the Al-Bi-Sn immiscible alloy is, by atomic percentage (at.%), Al 100‑x‑ y Bi x Sn y The alloy is prepared by rotational deposition solid-phase additive manufacturing method, where x = 8~15, y = 7~20, and x+y = 15~35. By controlling the component ratio and microstructure, the present invention achieves uniform composite of BiSn solid solution matrix and Al phase particles, with no particle agglomeration, high density, and excellent hardness and self-lubricating wear resistance, which can directly meet the application requirements of lightweight wear-resistant components such as automotive bearings and dry friction bearings.