11results about How to "Raise the intensity level" patented technology

The invention discloses preparation of flame-retardant high-toughness PMI foam, and relates to the technical field of high-performance materials. Methacrylic acid, methacrylonitrile, an initiator, a modifier, a foaming agent, a cross-linking agent and a nucleating agent are adopted as main raw materials, a reaction solution is obtained after thickening treatment, then the reaction solution is injected into a mold, and water bath polymerization reaction and heating foaming are performed to prepare the foaming agent. The PMI foam material prepared by the method has excellent flame retardance and high toughness, and is suitable for the fields of aerospace, rail transit and high-end structural materials.

The invention discloses a 610 MPa-grade high-strength steel plate with low welding crack sensitivity and a manufacturing method thereof. The steel plate comprises the following chemical components: 0.04%-0.05% of C, 0.20%-0.35% of Si, 1.30%-1.40% of Mn, less than or equal to 0.008% of P, less than or equal to 0.003% of S, 0.30%-0.40% of Ni, 0.15%-0.25% of Cr, 0.15%-0.25% of Mo, 0.020%-0.030% of V, less than or equal to 0.0003% of B, less than or equal to 0.04% of Cu and the balance of Fe and inevitable impurity elements. The welding crack sensitivity index Pcm ranges from 0.15% to 0.16%; the manufacturing method comprises the steps of EAF smelting, LF refining, VD vacuum treatment, controlled rolling and controlled cooling and tempering heat treatment. The steel plate provided by the invention is high in strength and good in low-temperature toughness, and the transverse impact energy at-50 DEG C is 200-300J.

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.

The invention discloses a CT130ksi continuous oil well pipe and a preparation method thereof, belongs to the technical field of oil well pipes, and solves the problems of low strength and toughness of continuous oil well pipes in the prior art. The CT130ksi continuous oil well pipe is prepared from the following components in percentage by mass: 0.13 percent to 0.17 percent of C, 0.18 percent to 0.28 percent of Si, 1.0 percent to 1.4 percent of Mn, less than or equal to 0.005 percent of P, less than or equal to 0.005 percent of S, 0.35 percent to 0.55 percent of Mo, 0.45 percent to 0.52 percent of Cr, 0.22 percent to 0.25 percent of Ni, 0.03 percent to 0.06 percent of Al, 0.02 percent to 0.03 percent of Nb, 0.01 percent to 0.02 percent of Ti, 0.0012 percent to 0.002 percent of B and the balance of Fe and inevitable impurities. The CT130ksi continuous oil well pipe disclosed by the invention is high in strength and good in toughness.

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 invention discloses a TC21 titanium alloy forging method, comprising: β Forging in the (α+β) zone at ‑(30~60)℃, temperature is T β +(10~15)℃β zone forging, temperature is T β Forging in the (α+β) zone at ‑(30~60)℃, with the total deformation controlled at 5%~20%, finally obtains the organizational characteristics of the forging: small β grain size; fully broken grain boundaries; the α phase broken into short rods in the grain, with the width of the α layer between 3~5μm and the aspect ratio <15. This organization can greatly improve the strength level of the alloy, while obtaining high plasticity and high fracture toughness. Its excellent comprehensive performance enables it to meet the performance requirements of the new aircraft forging standards, solving the problem of unsatisfactory microstructure of TC21 titanium alloy forgings after production by traditional process routes.

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.

The present invention belongs to the field of aerospace technology, and specifically relates to an on-track torsion spring-driven unfolding truss structure, which includes a plurality of folding trusses, wherein the folding rods between adjacent trusses are connected by a rotating pair, and the rotation of the rotating pair is driven by a torsion spring to control the unfolding of the folding rods; a timing mechanism is arranged between each truss to control the orderly unfolding of the trusses; after the trusses are orderly unfolded, a locking mechanism is used to restrict them; the structure is composed of a plurality of trusses, and a docking mechanism is designed for the unfolding truss structure to implement docking; a guide rail is arranged on the unfolding truss structure to realize the load-bearing function after unfolding; the structure can provide guarantee for the long-term steady-state operation and very long baseline observation of the platform, meet the requirements of lightweight, high rigidity and high storage rate, and realize the functions of unfolding, docking, timing unfolding and guide rail bearing.

The invention discloses a CT150ksi continuous oil well pipe and a preparation method thereof, belongs to the technical field of oil well pipes, and solves the problems of low strength and toughness of continuous oil well pipes in the prior art. The CT150ksi continuous oil well pipe comprises the following components in percentage by mass: 0.21 percent to 0.26 percent of C, 0.18 percent to 0.28 percent of Si, 1.2 percent to 1.6 percent of Mn, 0.35 percent to 0.55 percent of Mo, 0.45 percent to 0.52 percent of Cr, 0.25 percent to 0.3 percent of Ni, 0.03 percent to 0.06 percent of Al, 0.02 percent to 0.03 percent of Nb, 0.01 percent to 0.02 percent of Ti, 0.0012 percent to 0.002 percent of B, less than or equal to 0.005 percent of P, less than or equal to 0.005 percent of S and the balance of Fe and inevitable impurities. The CT150ksi continuous oil well pipe disclosed by the invention is high in strength and good in toughness.

The present invention provides an air conditioner housing and an air conditioner, wherein the air conditioner housing includes an air outlet; the air outlet includes a long end face and a short end face, and a reinforcement portion is provided at the junction of at least one set of adjacent long end faces and short end faces. In the technical solution provided by the present invention, the problem of excessive stress at the corner of the air outlet is solved through the design of the reinforcement portion, thereby avoiding damage caused by the stress problem and extending the service life of the air conditioner.