33results about How to "Intensity exceeds" patented technology

The invention discloses a ceramic particle for water treatment and a preparation method thereof, belonging to the production field of water treatment filter material. The ceramic particle is made from granite powder, bentonite, coke powder, sawdust and pulverized coal in a certain proportion. Compared with the prior art, the ceramic particle has the characteristics of good water purifying effect,low production cost, little energy consumption, and so on, and can be widely applied to sewage treatment in various fields.

The invention discloses a preparation method for an electromagnetic protection phosphate material capable of being subjected to 3D printing. According to the method, phosphate cement and a porous aggregate material are utilized for preparing functional phosphate cement integrating electromagnetic wave absorbing and heat preservation integration, an electromagnetic wave absorbing structure is printed on the surface of a concrete structure by utilizing the performance of intelligence, flexibility, precision and the like of the 3D printing technology, and the porous aggregate material is porous EPS, and the dual effects of achieving electromagnetic wave absorbing and protection on the concrete structure and improving the heat preservation performance of the concrete structure are achieved.

The invention relates to a high-strength and high-thermal conductivity new material solid-liquid composite brake drum and a preparation method thereof, belonging to the technical field of auto parts. The composite brake drum is made of high-strength nodular iron in the outer layer and gray cast iron with high thermal conductivity in the inner layer, which are cast into one body through centrifugal solid-liquid composite casting. Firstly, the outer layer of the composite brake drum is poured on the iron particle-filled coated sand shell production line, and the iron particle-filled coated sand shell is used to solidify and cool quickly. High strength and high toughness, on this basis, under the conditions of centrifugal casting, the gray cast iron of the inner layer is poured, and by controlling the centrifugal casting forming process, good metallurgical bonding of the inner and outer layers is achieved, and the distribution of graphite is significantly improved, so that the composite system of the present invention The dynamic drum has the characteristics of high strength and high thermal conductivity. The service life of the composite brake drum of the invention is more than three times higher than that of the common bimetallic composite brake drum, and the popularization and application has good economic and social benefits.

The invention discloses a dissimilar metal composite piston forging process, which relates to the technical field of solid-state thermal die forging. Dissimilar metals are cut according to their respective required lengths and weights; the piston rod is processed into a piston by leaving a surplus of metal material The shape of the rod, and the processed piston rod material is placed in the die on the press table; the heated piston head is placed on the piston rod material in the die with metal material, and the press is operated to squeeze the punch. Forming of dissimilar metals in the concave die; the press ejects the forged composite piston, takes the forged composite piston out of the concave die and air-cools, and completes the forging process; according to the use requirements of different parts of the piston, different metal materials are used , and the performance and reliability of the composite piston after forging can meet the operating requirements of high-voltage switch electrical components. Also disclosed is a mold used for extrusion forging when implementing the dissimilar metal composite piston forging process.

The invention discloses a crimping diffusion welding process and clamp of aluminum or aluminum alloy and heterogeneous metal, relating to the technical field of solid-state welding. The process comprises the following steps of: carrying out surface treatment on prewelded surfaces: overlapping the prewelded surfaces of a piece to be welded face to face together, then putting between an upper pressing plate and a lower pressing plate of the clamp, and carrying out cold pressing; putting the piece to be welded, which is tightly pressed and protected, and the whole clamp into a box-type electric furnace, heating, preserving the heat and prewelding; after diffusion welding is finished, taking the whole clamp out, and carrying out hot pressing on a hydraulic machine once; and then carrying out diffusion welding. The invention provides the process which is used for carrying out crimping diffusion welding of aluminum or aluminum alloy and heterogeneous metal under the non-vacuum condition by using the common hydraulic machine, the common box-type electric heating furnace and the clamp; meanwhile, a workpiece with large feature size and larger thickness is not limited by the traditional vacuum diffusion welding process.

The invention belongs to the technical field of lightweight of automobiles, and relates to a welding process for a lightweight aluminum alloy automotive roof. The welding process of the lightweight aluminum alloy automotive roof comprises the steps that an air duct support of the automotive roof is integrally formed through extrusion by an extrusion die, and the air duct support integrally formedthrough extrusion is cut at equal intervals; a corner weld structure is formed between an automotive crossbeam and a bent plate; after the two sides of a weld are polished, the automotive crossbeam and the bent plate are welded, wherein the welding current is 155-165 A, the voltage is 21.2-22.5 V, and the welding speed is 9-11 mm / s; and a butt weld structure is formed between the air duct supportand the automotive crossbeam, the bevel angle is 55 degrees, and after the two sides of a weld are polished, the air duct support and the automotive crossbeam are welded, wherein the welding current is 155-165 A, the voltage is 21.2-22.5 V, and the welding speed is 12-14 mm. By adoption of the welding process of the lightweight aluminum alloy automotive roof, the problems that in the machining process of the automotive roof, the welding workload is large, and operation is complex are solved.