33results about How to "Full stress release" patented technology

The invention discloses a thick steel plate and a manufacturing method thereof, and belongs to the field of ferrous metallurgy. The method comprises the following steps of molten iron KR pre-desulfuration, converter smelting, LF refining, RH vacuum treatment, wire feeding, flexible stirring, plate blank continuous casting, plate blank reheating, rough rolling, intermediate blank temperature holding cooling, precision rolling, ACC quick cooling, steel plate straightening and stacking slow cooling, wherein in the plate blank reheating stage, the temperature is 1120-1220 DEG C, and the in-furnacetime is longer than or equal to 1.0 min/mm; in the rough rolling stage, the temperature is 1000-1080 DEG C, and the thickness of an intermediate blank after rolling is larger than 2.5 times that of asteel plate; in the precision rolling stage, the temperature is lower than or equal to 900 DEG C, the finish rolling temperature is 780-820 DEG C, and the total compression ratio in the stage is larger than or equal to 60%; in the cooling stage, the finish cooling temperature is 300-400 DEG C, and the cooling rate is 10+/-5 DEG C/s. The steel plate manufactured through the method comprises the following chemical components of, by mass percent, 0.06-0.09% of C, 0.10-0.30% of Si, 1.40-1.70% of Mn, 0.020-0.060% of Al, 0.03-0.05% of Nb, 0-0.020% of Ti, 0-0.30% of Cr, 0-0.016% of P, 0-0.005% of S,0-0.080% of N and the balance Fe and inevitable impurity elements, the carbon equivalent Ceq is equal to [C+Mn/6+(Cr+Mo+V)/5+(Cu+Ni)/15] and smaller than or equal to 0.42%, the welding crack sensitivity index CEpcm is equal to [C+Si/30+(Mn+Cu+Cr)/20+Ni/60+Mo/15+V/10+5B] and smaller than or equal to 0.20%, and the applicable thickness of the steel plate is 40-70 mm.

The invention discloses a high-performanceradialorientation rare-earth permanent magnetic tube and a thermal-deformationforming method thereof, and belongs to the technical field of rare-earth permanent magnetic seamless tube manufacture. A raw-material component of the permanent magnetic tube is RE-(Fe,Co)-B, wherein RE is or one or more ofyttrium or lanthanide elements which are represented by Nd, and one or more other transition metal elements can be added at the same time; a horizontal loading horizontal-type rotation double-motion extrusion device of which a connecting angle alpha is greater than or equal to zero degree and smaller than or equal to 90 degrees is adopted, firstly, hot pressing is conducted on rapid-quenching magnetic powder to form a full-densityisotropousmagnet, then, horizontal positive shuntextrusion is conducted on the full-densityisotropousmagnet to form the radialorientation permanent magnetic tube, the tube length is greater than 50 mm, and the tube diameter is adjustable in a range of 0-150 mm.The horizontal extrusion technology overcomes the spatial height limit of a vertical device, the long-range rheological property improves the magnetism and microstructure uniformity of the permanent magnetic tube, the permanent magnetic tube of which the length, diameter and wall thickness can be freely adjusted in a large size range can be prepared, which is beneficial for the batch production of the radialorientation rare-earth permanent magnetic tube. Through conducting saw cutting on the permanent magnetic tube, nanometer rare-earth permanent rings, magnetic tiles and ceramic chips can be obtained.

The invention discloses a deformation-resistant composite solid wood floor board. Two first grooves in uniform distribution are formed at the bottom of the composite solid wood floor board, a second groove is formed on one end face of the composite solid wood floor board, a protrusion is arranged on the other opposite end face of the composite solid wood floor board and can be contained in the second groove when two composite solid wood floor boards are spliced, and the first grooves, the second groove and the outer edge of the protrusion jointly form a four-point balance stress groove of the composite solid wood floor board. By the four-point balance stress groove, deformation-resistant standard is enhanced, stress is fully released, and the objective of deformation preventing is achieved.

The invention belongs to the technical field of aluminum alloy, and relates to a machining technology of an ultrawide 6061 aluminum alloy panel for a military test detection platform. Aluminum alloy is prepared from, by weight percentage, 0.63-0.69% of Si, 0.45-0.55% of Fe, 0.2-0.3% of Cu, 0.08-0.12% of Mn, 1.05-1.15% of Mg, 0-0.1% of Zn, 0.013-0.02% of Ti, 0-0.05% of Zr, 0-0.05% of single impurities, and the balance Al, wherein the total weight percentage of the above raw materials except Al is smaller than or equal to 0.15%. The lost pass is added in the hot rolling process, during shallow pass, by cooling the panel with rolling mill air-blowing equipment, the purpose of uniformly and slowly lowering the finish rolling temperature is achieved, arching of the back of the panel due to theexcessive width is avoided, and the problems that for the ultrawide 6061 aluminum alloy panel prepared through an existing machining technology, the contradiction between the width and flatness of thepanel and the machining deformation is prominent, and it is hard to meet customer needs are solved.

The invention provides a heat treatment method for correcting the plane warping deformation of an injection molded product and belongs to the technical field of injection molding. A correcting tool isdivided into three parts including a U-shaped correcting support frame, a regulating block and a pressure application block. The heat treatment method comprises the steps: placing the regulating block in the middle of the U-shaped correcting support frame, placing a corrected injection molded product above the regulating block and the U-shaped correcting support frame, and mounting the pressure application block above the corrected injection molded product; then, placing a combined body into a drying oven or completing the combination in the drying oven, carrying out heat insulation, meanwhile, keeping a drying environment, setting the temperature of the drying oven to be 10-20 DEG C lower than the glass transition temperature of the material of the injection molded product, keeping the temperature for 1-2 h, and then, taking out and separating each part; and cooling a to-be-corrected injection molded product to the room temperature, and repeating the process once or twice. Accordingto the heat treatment method, a plastic product is subjected to heat treatment, and the internal stress of the plastic product is firstly released under the assistance of correcting measures, so thatthe problem of injection molding plane warping deformation is effectively solved.

The invention relates to a production method of a thin and long thin-plate type part and belongs to the field of machine manufacturing. The temperature of heat treatment is 820-900 DEG C and the heat-preservation time is 8-12 hours; a pressing machine is used for pressing to quench and the pressure of the pressing machine is improved to 6-12 Mpa; water cooling is adopted, the water temperature is 20-40 DEG C and the time is 4-6 minutes; after the quenching, annealing is carried out immediately within two hours; the annealing temperature is 150-180 DEG C and the heat-preservation time is 6-8 hours; a milling manner is used for carrying out fine machining and the fine machining comprises rough milling, natural aging and fine milling; the rough milling is carried out, namely, front and back surfaces of the part are exposed, the front and back surfaces are repeatedly milled for 4-5 times and the machining amount is 1.8-2 mm; the natural ageing is that the part is placed on a flat plate or is vertically suspended and the natural ageing is carried out for 24 hours; and the fine milling is carried out, namely, the front and back surfaces are repeatedly milled for 2-3 times and the machining amount is 1-1.2 mm. According to the production method, water quenching and cooling are adopted and the pressing machine is used for pressing to quench; spring steel is arranged so that the pressure of the pressing machine is improved and the natural ageing procedure is increased; and the deformation of the thin and long thin-plate type part is solved and the hardening crack can be effectively prevented.

The invention provides a laser cladding deformation control method for a slender piston rod. The laser cladding deformation control method comprises the following steps of rough turning, wherein the reserved size is larger than or equal to phi(D+n) mm; drilling a hinge hole; hardening and tempering; straightening, wherein the jerk value of the slender piston rod is less than or equal to 1mm; Semi-finish turning, wherein the reserved size is larger than or equal to phi(D+n1) mm; finish turning, specifically, carrying out further finish machining on the outer circle of the slender piston rod bytaking a semi-finish-turned outer circle as a benchmark; high-speed laser cladding, specifically, detecting the jerk value of a sealing surface; size detection, specifically, detecting the diameter ofeach part of the slender piston rod; and carrying out milling-flattening, excircle grinding and polishing in order to complete the laser cladding process of the slender piston rod. The laser claddingdeformation control method for the slender piston rod has the advantages that severe workpiece deformation caused by excessive heat generated in the laser cladding process is avoided, and the processflow and time are saved.

The invention discloses a rotor shaft with an oil pipe and a machining process of the rotor shaft. The machining process of the rotor shaft comprises the following steps that: a hollow rotor shaft body is subjected to die forging, wherein the hollow rotor shaft body comprises a first hollow shaft section and a second hollow shaft section, and the pipe diameter of the first hollow shaft section is smaller than that of the second hollow shaft section; an oil pipe inserted with a mandrel is inserted into the hollow rotor shaft body, so that the first end of the oil pipe is matched with the first hollow shaft section; the first hollow shaft section is spun, so that partial area of the first hollow shaft section and the first end of the oil pipe are forged and pressed into a whole; the mandrel is taken out from the second end of the oil pipe; and the second hollow shaft section is spun, so that partial area of the second hollow shaft section and the second end of the oil pipe are forged and pressed into a whole to form a third hollow shaft section. With the rotor shaft with oil pipe and machining process of the rotor shaft adopted, the problem that an existing rotor shaft has internal stress due to the fact that the machining manufacturability of the rotor shaft is poor can be solved.

The invention relates to an oil well pipe for a heavy oil thermal recovery well, and a manufacturing method. The oil well pipe comprises, by weight percent, 0.37 to 0.42% of C, 0.15 to 0.30% of Si, 0.60 to 0.80% of Mn, not larger than 0.02% of P, not larger than 0.01% of S, 0.8 to 1.5% of Cr, 0.04 to 0.06% of Nb, 0.04 to 0.06% of Ti and the balance Fe and inevitable impurities. The oil well pipe has the beneficial effects that the cost is low, the industrial batched production is easily achieved, through the heat treatment technology of subcritical quenching, superhigh temperature tempering and surface aluminizing, the structure of the steel pipe is fine and uniform, corrosion resistance is greatly improved, and the use needs of the current and future market for the oil well pipe with thehigh temperature resistance and corrosion resistance properties are met.

The invention discloses a method for regulating and controlling an integrated casting composite interface of a nickel-based high-temperature alloy/SiC ceramic composite component, and belongs to the field of casting equipment and processes. According to the method, a metal net structure woven by a single-layer multi-thread transverse and longitudinal weaving process is matched with non-poured ceramic for use, so that the problems of large residual stress and uneven distribution in an interface after casting forming under the background that parts need to be additionally arranged on the interface joint of the existing nickel-based high-temperature alloy/SiC ceramic composite component are solved. Metal warps of the metal net structure are pure copper wires, platinum-rhodium wires and singleNiTi alloy wires in sequence, wherein the NiTi alloy wires are wound around the platinum-rhodium wires and the copper wires. Metal wefts are sequentially composed of a single NiTi alloy wire, a platinum-rhodium wire around which a fine NiTi alloy wire is wound and a single NiTi alloy wire, and the specification of the metal wefts is the same as that of the metal warps. The method also has the advantages that existing equipment does not need to be replaced, the adopted materials are all conventional materials, and the applicability is wide.

The invention discloses a method for reducing the same plate difference of the rolling temperature of an ultra-long TMCP plate. The process route comprises the steps of molten iron KR pre-desulfurization, converter smelting, LF refining, soft stirring, plate blank continuous casting, plate blank reheating, rough rolling, intermediate blank temperature cooling, finish rolling, steel plate water cooling, steel plate hot straightening, offline stack cooling and discharging for cooling on a cooling bed to 80 DEG C, steel plate ultrasonic flaw detection, shot blasting, normalizing, steel plate accelerated cooling, shearing and warehousing.