42 results about "Casting" patented technology

The invention discloses a working roll for rolling a medium-thickness plate with high grade and high strength and a manufacture method thereof. The working roll is applied to a medium-thickness plate rolling mill of a rolling steel industry. A working layer comprises the following alloy components in percentage by weight: 3.00-3.50 percent of C, 0.40-1.20 percent of Si, 0.50-1.20 percent of Mn, not more than 0.10 percent of P, not more than 0.05 percent of S, 1.30-2.50 percent of Cr, 3.20-4.50 percent of Ni, 0.20-1.00 percent of Mo, 0.20-2.00 percent of W and 1.00-1.50 percent of V. A roll core comprises the following chemical components in percentage by weight: 2.80-3.50 percent of C, 2.00-2.50 percent of Si, 0.50-1.00 percent of Mn, not more than 0.10 percent of P, not more than 0.05 percent of S, 0.20-0.50 percent of Cr, 0.20-0.60 percent of Ni, not more than 0.20 percent of Mo and not more than 0.30 percent of Re. The working roll manufactured by adopting a centrifugal composite casting process and two-section tempering production at 400-550 DEG C for 25-30 hours is the working roll for rolling the medium-thickness plate with high grade and high strength, which has the advantages of high abrasion resistance and less hardness reduction.

The invention provides glass ceramics prepared from tailings obtained by nickel-molybdenum ore dressing and smelting and a preparation method thereof. The glass ceramics use the tailings obtained by nickel-molybdenum ore dressing and smelting as main raw materials and silica or quartz sand (SiO2), limestone or calcite (CaCO3), sodium carbonate (Na2CO3), alumina (Al2O3), potassium carbonate (K2CO3), magnesium oxide (MgO) and calcium fluoride (CaF2) as auxiliary raw materials. The preparation method comprises the steps of grinding the tailings obtained by nickel-molybdenum ore dressing and smelting and the auxiliary raw materials, sieving the powder with a 20-mesh sieve, and mixing the powder uniformly in a mixer to obtain a base batch; melting the base batch at the temperature of 1450-1550 DEG C, homogenizing and clarifying the melt to obtain qualified molten glass, and then forming a base glass plate or granules through moulding by casting or water quenching of the molten glass; finally filling the base glass plate or the granules into a mould, and then carrying out crystallization thermal treatment, thus obtaining the glass ceramics prepared from the tailings obtained by nickel-molybdenum ore dressing and smelting. The preparation process is simple in operation course and has the effects of not only expanding the way of resource comprehensive utilization of the tailings obtained by nickel-molybdenum ore dressing and smelting but also reducing the environmental pollution of the tailings.

The invention discloses a down-the-hole radial gate with multiple frames and multiple trunnions and two lifting pad eyes. The down-the-hole radial gate with the multiple frames and the multiple trunnions and the two lifting pad eyes is characterized in that a multiple frame structure is adopted in the door body structure of a gate (1), and the gate (1) is hinged with a group of trunnions (4) installed on a breast wall (3) of a gate wall (2). The down-the-hole radial gate with the multiple frames and the multiple trunnions and the two lifting pad eyes reduces loads distributed to each main beam and each support arm through the multiple frame structure, shares huge concentrated water pressure of a high water head of a drainage port to the gate through the plurality of trunnions, and the loads distributed to each trunnion are greatly reduced so as to reduce the difficulties of the design, manufacture, welding, transportation and installation of the gate and the casting of the trunnions. The radial gate is provided with the two lifting pad eyes, is operated by adopting a double-cylinder swinging type or a suspension type hydraulic cylinder, the volume of single cylinder hydraulic cylinder is reduced by half so as to reduce the difficulties of the design, manufacture and installation of the hydraulic cylinder. The rotating center of the gate coincides with the circle center of an arc-shaped water-facing surface, and the total water pressure acting on the arc-shaped water-facing surface is enabled to always pass through the rotating center of the trunnions so as to reduce the force of the opening and closing of the gate.

A casting method and mold design for optimization of material properties of a casting is disclosed, wherein the optimization is accomplished through control of a cooling rate of the casting to provide desired material properties throughout the casting.

The invention relates to a polyhedron main substrate for installing support devices, a measurement device and a lens barrel device, wherein the main substrate is provided with at least a working position, and the outer surface of the main substrate is defined by polygon enveloping surfaces of installation regions of the support devices, the measurement device and the lens barrel device, and is a convex polyhedron formed through connecting a plurality of other planes according to a convex enveloping rule. According to the present invention, based on the polyhedron structure design, the whole structure of the obtained main substrate is simple and efficient, good dynamic performance and good stability can be achieved, processing characteristics of integrated main substrate casting are met, and the main substrate formed through the combination has performance advantages of high modality and low quality compared with the existing structure.

The preparation method comprises the following steps: firstly, preparing a copper-based alloy powder intermediate material which contains a ZrO2 and Fe-containing precipitated phase mixture and has the specific gravity close to that of a matrix alloy by adopting induction melting and melt atomization technologies; then, selecting intermediate material powder with a certain size, and preparing a target alloy with the intermediate material powder and industrial pure copper as raw materials; and finally, the induction melting technology is adopted, and casting is conducted to prepare the kilogram-level Fe-containing copper-based alloy with the dispersion and precipitation double-strengthening characteristics. The Fe-containing copper-based material is characterized in that nano ZrO2 oxides and Fe-containing precipitated phase particles with different number densities are uniformly and dispersedly distributed on a copper alloy matrix. The synthesized novel Fe-containing corrosion-resistant copper alloy material has the performance of DS-Cu and the advantages of a PH-Cu preparation technology, the cost is low, repeatability is good, and the size and content of oxide particles and precipitated phases can be effectively regulated and controlled; the whole technological process is simple, efficient and controllable, and industrial large-scale production is easy to implement.

The invention aims to solve the problems that the temperature of a traditional gas flame correcting and heating process is not uniform, secondary cracking is easily generated, the efficiency is low are solved, an induction heating mode is adopted, a special-shaped movable induction coil is designed according to the section shape of a titanium alloy special-shaped tubular casting, the heating rateand the heating temperature are controlled, the integral heating is carried out on the local part of the casting, and the secondary cracking tendency caused by heat concentration is prevented. A tool,a clamp and a mold are designed, and a deformation part is subjected to plastic deformation through a hydraulic press, so that the casting is corrected. The method is suitable for the thermal state correction of the titanium alloy tubular casting with the wall thickness less than or equal to 20 mm, and the heat correcting efficiency of the casting is greatly improved.

The invention discloses a Raymond mill scraper knife seat which is made of an A3 steel press forging piece. A manufacture method of the Raymond mill scraper knife seat comprises the following steps: (1) blanking; (2) calcining at the temperature of 850-1000 DEG C; (3) forging and pressing for forming; and (4) naturally cooling, and punching, or also comprises the step of (5) welding a reinforced plate between an auxiliary seat end at the back surface and a folding plate, or also comprises the step of (6) welding a positioning strip at a main seat end at the back surface and the bending part of the folding plate. Compared with a common casting in the prior art, the Raymond mill scraper knife seat has the advantages of being not prone to break, durable, low in cost, convenient to process, easy in quality control, stable in shape, convenient to install, and the like.

The invention discloses a high-precision mould assembling device for casting, and relates to the field of sand mould casting. The high-precision mould assembling device comprises an upper moulding boxand a lower moulding box. Upper mould assembling sleeves are arranged at the four corners of the upper moulding box and are each in a sector shape, and the circle centers of the upper mould assembling sleeves are overlapped with the vertexes of the four corners of the upper moulding box. Lower mould assembling sleeves are arranged at the four corners of the lower moulding box and are each in a sector shape, and the circle centers of the lower mould assembling sleeves are overlapped with the vertexes of the four corners of the lower moulding box. A hemispherical cavity is formed in the lower end face of each upper mould assembling sleeve, the upper end of each cavity is closed, an opening is formed in the lower end of each cavity, and two elastic protrusions are arranged on each opening. Hemispherical locating columns matched with the cavities are arranged on the upper end faces of the lower mould assembling sleeves, and two grooves matched with the corresponding elastic protrusions are formed in each locating column. In the high-precision mould assembling device, the mould assembling device can be located accurately, and reliability is high; the structure and operation are simple,use is convenient, and cost is low; and a certain guiding and locating function is achieved, and the process that when locating is inaccurate, the position is adjusted to achieve accurate locating isfacilitated.

The invention discloses a spot welding repairing device and method for an iron casting. The spot welding repairing device comprises a detection table, wherein sliding rails are installed at the two ends of the table surface of the detection table, pulleys are movably installed on the sliding rails, and a casting clamping assembly and a welding spot repairing mechanism are installed at the upper end of the table surface of the detection table; the casting clamping assembly comprises a bottom plate, sliding ways, sliding plates, clamping blocks and fastening nuts; and the welding spot repairingmechanism comprises a plate frame, an air cylinder, a lifting plate, a welding gun mounting plate, welding guns and a power line. According to the spot welding repairing device and method for the ironcasting, the casting is clamped and fixed through the arranged casting clamping assembly, the stability of the casting in the spot welding repairing process is guaranteed, spot welding repairing operation is carried out on cracks and crack holes in the casting through the arranged welding spot repairing mechanism, automation of casting repairing is achieved, participation of manpower is reduced,and the quality of casting repairing is improved.