34results about How to "Fully detailed" patented technology

The invention discloses a torsion type reciprocating extrusion device and a process method thereof, belonging to the technical field of plastic formation. The device comprises a cavity die, a cavity die cover plate and a cavity die fixing plate, wherein the cavity die fixing plate is fixed on a work table, and the cavity die with a variable section spindle structure is arranged between the cavitydie fixing plate and the cavity die cover plate. The process method makes materials generate the compound formation of reciprocating extrusion and torsion shearing so as to prepare ultra-fine grainedmaterials with larger volume and uniform tissue.

The invention relates to low temperature resistant microalloyed steel. The chemical components of the microalloyed steel comprise, by weight, 0.075%-0.1% of C, 0.10%-0.30% of Si, 1.0%-1.40% of Mn, 0.25%-0.50% of Cr, 0.020%-0.030% of Nb, 0.015%-0.025% of Ti, less than or equal to 0.015% of Al, less than or equal to 0.010% of P, less than or equal to 0.010% of S, the balance Fe and unavoidable impurity elements. The unavoidable impurity elements comprise the gas content and other unavoidable impurity elements, wherein the gas content comprises less than or equal to 2.0 ppm of molten steel [H], less than or equal to 2 ppm of a casting blank [H], less than or equal to 30 ppm of [O] and less than or equal to 50 ppm of [N]; and the other unavoidable impurity elements account for less than or equal to 1%. Meanwhile, the invention further relates to a production technology of the low temperature resistant microalloyed steel. Through a Nb+Ti microalloyed technology, growth of austenite grains is effectively controlled in the heating process of steel rolling, a ferrite-pearlite ultra-fine grain structure is obtained finally, the grain size reaches above the 10th level, and the technical requirements for indexed such as low temperature are met. The yield strength of the microalloyed steel is higher than 355MPa, the tensile strength is higher than 550MPa, -60 DEG C low temperature impact Ak is higher than 27J, and the elongation after breaking is higher than 22%.

The invention provides a rolling technology for high-carbon steel in thin slab casting and rolling. The rolling technology includes the processes of continuous casting, heat evening, scale removing, rolling, inter-stand cooling, laminar cooling, reeling and insulation cover slow cooling. The rolling technology is characterized in that the rolling process includes three stages of Austenite perfect recrystallization rolling, non-recrystallization area Austenite rolling and two-phase area rolling. Medium-and-high-carbon steel structures rolled through the rolling technology are even and fine ferrite and particular pearlite, banded structures can be improved, the mechanical property is good, the annealing process does not need to be conducted before forming, cost is reduced, and quite high practicability is achieved.

The invention relates to a biomass feed extruder. An extrusion propeller assembly of the extruder comprises a propeller rear axle, a propeller front axle and a propeller outlet taper sleeve, wherein the propeller rear axle is located in an extrusion box assembly and fixedly connected with a power output shaft of a power source through a transmission mechanism, the propeller front axle and the propeller rear axle are connected and both provided with threads, the propeller outlet taper sleeve is fixed to the front end of the extrusion box assembly, and the propeller front axle is located in a conical hole of the propeller outlet taper sleeve; a hopper welding part is fixed above the extrusion box assembly, a stirring shaft of a feeding and weed pulling mechanism is connected with the power output shaft of the power source through the transmission mechanism, the stirring shaft and a stirring plate are located in the extrusion box assembly, and the stirring plate is fixed to the front end of the stirring shaft; the cross section of the stirring plate is in the shape of a broken line, and the left portion and the right portion of the stirring plate are parallel to each other. By the adoption of the biomass feed extruder, accumulation and blocking of materials can be effectively avoided, and production efficiency is high.