4results about How to "Raise the intensity level" patented technology

The present application relates to an Al-Zn alloy material and a preparation method thereof, the Al-Zn alloy material comprises the following components in percentage by weight: Zn 8-12 wt.%, Mg 2.8-3.2 wt.%, Cu 1.2-1.5 wt.%, Zr 0.1-0.2 wt.%, and the balance is Al. On the one hand, the high Zn content changes the nucleation and growth kinetics of the η' phase, and increases the volume fraction of intragranular precipitates. On the other hand, the Al3Zr dispersed phase formed by the Zr element effectively pins dislocations and grain boundaries, inhibits recrystallization and limits the segregation of solute atoms to grain boundaries, thereby significantly inhibiting the continuous precipitation of grain boundaries and the expansion of PFZ.

This invention relates to an ultra-thin flooring for cold storage with an internal insulation structure and its construction method. The construction method includes the following specific steps: S1: Casting a reinforced concrete floor slab; S2: Sequentially laying a vapor barrier layer, an insulation layer, a waterproof and breathable layer, and a geotextile layer on the reinforced concrete floor slab; S3: Pouring a concrete surface layer on the waterproof and breathable layer. The advantages of this invention are its simple process and convenient construction. Addressing the characteristics of large-area ultra-thin flooring in large concrete cold storage structures—prone to cracking, peeling, and poor flatness—this invention develops an internal insulation structure for ultra-thin cold storage room flooring and its construction method, solving the technical problems of difficult repair after cracking of ultra-thin flooring in low-temperature cold storage, impacting cold storage operation, and low construction efficiency.

The application belongs to the technical field of metal material hot working, and particularly relates to a microstructure and performance regulation method for high-forging-ratio TA15 titanium alloy components. The method comprises the following steps: S1: blank heating, placing the blank in a heating furnace to heat to T1 temperature and heat penetration; S2: blank fast forging, taking the blank out of the furnace after heat penetration, performing multi-fire-time forging to prepare a blank on a fast forging machine to obtain an intermediate blank; S3: intermediate blank heating, placing the intermediate blank in the heating furnace to heat to T2 temperature and heat penetration; S4: die forging, taking the intermediate blank out of the furnace after heat penetration, performing die forging on a die forging press to obtain a final forging piece; and S5: post-forging treatment. The application effectively improves the internal microstructure uniformity and strength level of the high-forging-ratio TA15 titanium alloy forging piece by adjusting the forging heating temperature and deformation distribution in the blank preparation and die forging processes without increasing the remaining processes, so that the strength level is 30 MPa higher than the standard requirement.

This invention discloses a rope-driven deployment truss module for on-orbit assembly, belonging to the field of space folding mechanism technology. It addresses the limitations of large-scale development of space folding mechanisms and the volume constraints of transport vehicles. The truss mechanism of this invention includes several folding units, with adjacent folding units arranged front-to-back and connected by revolute joints. Two ropes originate from the same vertex of the outermost folding unit, connecting the rods in each folding unit in series, and finally reaching opposite vertices. One end of each rope is connected to a power element, and the other end is fixed to the opposite vertices. The folding and deployment of the truss are achieved by controlling the telescopic rods through the ropes.