26results about How to "Fully deformed" patented technology

The invention relates to the technical field of pressure forming, in particular to a skin drawing and liquid filling composite forming method for a double-layer plate of a double-curvature part, and aims to solve the problems that according to an existing aircraft skin forming process, the part is broken and wrinkled, the surface quality is poor, and the part with the complex shape and the large curvature change is difficult to manufacture. The method comprises the following steps that double-layer plate materials comprise a first plate material and a second plate material which are made of different materials; skin stretching forming is conducted, specifically, the double-layer plate is placed on a skin stretching forming die to be subjected to skin stretching forming; and liquid filling forming is conducted, specifically, the double-layer plate obtained after surface drawing forming is placed in a bulging mold, liquid is injected for pressurization, and therefore the first plate forms a final part. The friction maintaining effect between the second plate and the first plate is utilized, the plasticity of the second plate is larger than that of the first plate, deformation of the first plate is more sufficient, the forming limit of a part formed by the first plate is improved, and the problems that the part is broken, wrinkled, poor in surface quality, difficult to manufacture and the like are solved.

The invention provides a process for optimizing the grain size grade difference of a large-size nickel-based superalloy bar, and belongs to the technical field of nickel-based superalloy bar manufacturing. The process comprises the following steps that S1, raw materials are weighed and smelted to obtain an electroslag ingot; s2, uniform diffusion annealing is carried out; s3, heating before forging to obtain a forging stock; s4, the forging stock is subjected to two times of drawing-out and two times of upsetting treatment, and a semi-finished product is obtained; and S5, the semi-finished product is continuously drawn out, and the bar is obtained. Through the integral design of the whole process scheme such as component design, four-section type diffusion annealing and setting of the forging temperature and the environment temperature, the thermal deformation resistance during forging is greatly reduced, center grains are refined, the grain size grade difference from the edge to the core of the GH4169 bar is controlled within the 1.5 grade, and the process is feasible, low in cost and suitable for large-scale production. The problem that the grain size grade difference of the nickel-based superalloy bar with the diameter larger than or equal to 350 mm is large is solved for the first time.

The invention discloses extra-thick rack steel EQ70 for an ocean platform and a production method of the extra-thick rack steel EQ70, the thickness of a steel plate ranges from 210 mm to 254 mm, the steel comprises, by weight, 0.10%-0.12% of C, 0.10%-0.20% of Si, 1.60%-1.70% of Mn, smaller than or equal to 0.010% of P, smaller than or equal to 0.003% of S, 0.030%-0.050% of Als, 2.00%-2.50% of Ni, 0.40%-0.50% of Cr, 0.50%-0.60% of Mo, 0.030%-0.040% of Nb, 0.0015%-0.0020% of B and the balance Fe and inevitable impurities, and the components of the steel meet the conditions that Ceq is smaller than or equal to 0.76%, Pcm A novel alloy component system is combined with clean steel smelting, water-cooling die casting, a heating temperature control process, a high-pressure rolling and after-rolling cooling process, a high-temperature rapid quenching process and an after-tempering rapid cooling process, and finally the steel plate performance is obtained, ReH is larger than or equal to 690 MPa, Rm is 810-890 MPa, the minus 40 DEG C longitudinal and transverse Charpy impact energy unit value is larger than or equal to 120 J at the 1 / 4 thickness position and the 1 / 2 thickness position of the steel plate, and flaw detection meets the GB / T 2970 first level. By adopting the scheme, the alloy is low in cost, high in yield and high in production efficiency, and has good market competitiveness.

The invention provides a tin plate wide steel strip and a preparation method thereof, and relates to the technical field of steel production, the method comprises the following steps: carrying out heat treatment on a continuous casting billet, and then carrying out hot continuous rolling treatment to obtain an initial steel strip; wherein the rolling reduction of the continuous casting billet in the rough rolling treatment process accounts for more than 75% of the total rolling reduction of the continuous casting billet; 6 passes of rough rolling and 7 passes of finish rolling are carried out in the rough rolling treatment process, the single-pass reduction rate of the first 3 passes of rough rolling is 17% or above, the single-pass reduction rate of the last 3 passes of rough rolling is 27% or above, and the single-pass reduction rate of the first 4 passes of finish rolling is 30% or above; the initial steel strip is subjected to laminar cooling to the coiling temperature and then is coiled, and the wide steel strip of the tin-plated plate is obtained; wherein the laminar cooling speed is 10 DEG C / s or above, and the coiling temperature ranges from 560 DEG C to 600 DEG C. The wide steel strip of the tin-plated plate prepared by the method disclosed by the invention is relatively uniform in structure and mechanical property, and the steel strip is not easy to deviate in the cold rolling process.

The invention belongs to the technical field of titanium alloy processing, and discloses a preparation method of a large-piece-weight, large-thickness, ultra-wide and high-toughness titanium alloy plate, which is suitable for preparing a titanium alloy plate with the thickness of 100-200 mm, the width of 2000-3000 mm and the length of 4000-10000 mm. According to the method, a large-specification cast ingot obtained through three times of VAR vacuum consumable arc melting is adopted for plate preparation, a formed alloy plate blank is obtained through multi-heating-number forging, then a finished plate is obtained through reversing rolling, and finally the large-piece-weight, large-thickness, ultra-wide and high-toughness finished plate with the excellent plate shape, structure and performance is obtained through heat treatment and straightening.

The utility model discloses a pet hair removing brush, and belongs to the technical field of hair removing brushes. The pet hair removing brush comprises a handle, a brush head support and a rack, wherein the shore hardness of the rack is below 80 degrees; scraping teeth are formed on the rack and are cones or truncated cones; the height of the scraping teeth is larger than 1 mm and smaller than 5 mm, and the scraping teeth are at least arranged on one face in the thickness direction of the rack. One side of the brush head bracket deviating from the handle is connected with a rack; the side, close to the brush head support, of the rack is thicker than the side, away from the brush head support, of the rack. The brush head support and the rack are projected in the thickness direction of the brush head support, and the projection of the brush head support and the projection of the rack are partially overlapped. In the width direction of the brush head support, the rack at least exceeds the brush head support by 10 mm. A user can easily apply force to the rack through the handle and the brush head support, the part, exceeding the brush head support, of the rack can be fully deformed, the brush head support effectively supports the rack, the rack can be attached to the surface of a household fabric product, and pet hair can be easily scraped off through the scraping teeth.

The invention discloses a multi-mode multi-degree-of-freedom latticed effect amplification type damping vibration attenuation system, and relates to the technical field of damping vibration attenuation and noise reduction, the multi-mode multi-degree-of-freedom latticed effect amplification type damping vibration attenuation system comprises a plurality of vibration attenuation structures, each vibration attenuation structure comprises a damping layer, and each damping layer comprises a frame body; a plurality of cantilevers and a plurality of torsion connecting arms are arranged in the frame body, wherein the cantilevers are located on the same plane, the free ends of the cantilevers face different directions, and the torsion connecting arms are located on the same plane and face different directions. The free end of the cantilever is provided with a mass section; the torsion connecting arm comprises a middle inertia section, and the two sides of the middle inertia section are connected with the frame body through fixing arms. The two fixed arms are both eccentrically connected with the middle inertia section and located on the two sides of the center of the middle inertia section respectively. And each damping layer is connected with the base body structure through a supporting structure unit. By the adoption of the scheme, through multi-mode / multi-degree-of-freedom vibration and the coupling effect of the multi-mode / multi-degree-of-freedom vibration, structure damping effect amplification and elastic wave regulation and control low and medium frequency efficient vibration reduction are achieved.

The invention discloses an elastic double-filament core-spun yarn fabric and a production method thereof, and belongs to the technical field of textiles. According to the elastic double-filament core-spun yarn fabric, pure cotton siro-spun yarns are selected as warps A, slub yarns are selected as warps B, and elastic double core-spun yarns are selected as wefts. In addition, the invention further provides a production method of the elastic double-filament core-spun yarn fabric, and the elastic double-filament core-spun yarn fabric is obtained through a warping process, a slashing process, a denting process and a weaving process in sequence. In the sizing process, warp beams of two kinds of warp yarns, namely warp yarns A C36.4 tex and warp yarns B C41.6 tex bamboo, are simultaneously adjusted on a beam creel, and the warp yarns A separated from one beam for common warping are combined with the warp yarns A on other beams. The tensile strength of the double-core-spun fabric is remarkably improved, meanwhile, the double-core-spun fabric has the characteristic of rapid moisture absorption, and the common problems of elasticity weakening and shape deformation of traditional cotton core-spun elastic fabric are effectively solved.

The utility model provides a pile collecting protective cover for a transformer, and relates to the field of electric power accessories. The top end of the protective cover body is bonded with the top piece structure, the pressing rod assemblies are installed outside the protective cover body through the connector assemblies, the two pressing rod assemblies of the arc-shaped structure are made of metal materials, and the connecting ring assembly is installed at the bottom of the protective cover body through the bottom piece. The pressing rod assembly is pressed downwards above the protective cover body by means of the weight of the pressing rod assembly, meanwhile, the protective cover body presses the connecting ring assembly and the contact assembly to be stressed, the connecting ring assembly is made of a flexible silica gel material, and an inner groove and an outer groove are formed in the connecting ring assembly, so that after the contact assembly is stressed and deformed, the contact assembly is attached to and closed with an installation position, and the plugging insulation effect is improved; the problems that according to a common transformer pile collecting protective cover, the attaching and sealing effect of the bottom and the installation position is poor, gaps are prone to occurring, rainwater enters the protective cover in the later period, and the insulation performance is affected are solved.

The present invention relates to the field of precision sheet metal processing technology, and in particular to a method and mold structure for hydraulically forming a rubber bag of a rotating body part, comprising a forming frame, a rubber bag sealing ring, a rubber bag, and a through cavity, wherein the forming frame is a cylindrical structure, the forming frame coaxially opens a cylindrical through cavity, the inner wall of the through cavity is fixedly connected to the rubber bag, the upper end of the rubber bag is provided with an injection port, the rubber bag injection port is fixedly connected to a rubber bag sealing ring, and the outer periphery of the rubber bag sealing ring is fixedly connected to the inner wall of the through cavity. The shortcomings of inadequate forming, cracking, and too low strength of sheet metal in the process of pressing sheet metal under traditional forming process methods are solved, and the yield rate of the device is improved.

The utility model relates to the technical field of switching devices, in particular to a heavy-current relay, which comprises a driving reed, an auxiliary movable reed and a push rod, the driving reed is arranged at one end of the push rod, a first support which protrudes along the radial direction of the push rod is integrally formed on the push rod, and an insulated second support is arranged at the tail end of the push rod. The second support is fixedly connected to the push rod, a driving reed and an over-travel spring are arranged between the first support and the second support, and an auxiliary movable reed is fixedly arranged in the second support and extends towards one side of the driving reed, so that the driving reed and the auxiliary movable reed are linked. The first support and the push rod are integrally formed, the second support is fixed at the tail end of the push rod through threaded connection, so that the driving reed is connected with the push rod, the auxiliary movable reed is fixedly connected to the second support, and the driving reed and the auxiliary movable reed are mounted through fewer parts. And the installation of the driving reed and the auxiliary movable reed is simplified.

The invention relates to the technical field of civil engineering damping equipment, in particular to a fabricated buckling-restrained replaceable beam-plate-column joint assembly and a mounting method thereof. An upper column hinge and a lower column hinge are arranged at the upper end and the lower end of the prefabricated column respectively, the upper column hinge or the lower column hinge is fixedly connected with the left beam hinge, a right beam hinge is arranged on the side portion of the prefabricated beam, the prefabricated column is connected with the prefabricated beam in a combined mode through insertion of the left beam hinge and the right beam hinge, and the prefabricated plate covers the prefabricated beam to form the beam-plate-column joint. A left beam hinge C-shaped baffle is arranged on the left beam hinge, a right beam hinge U-shaped baffle is arranged on the right beam hinge, and the arc-shaped section of the left beam hinge C-shaped baffle and the arc-shaped section of the right beam hinge U-shaped baffle are attached to each other. The structure is designed according to the optimal structure energy consumption mechanism, the beam hinge is considered firstly, then the column hinge is considered, the structure has the advantages of being simple and convenient to install and easy to replace, the structure is simple, the cost is low, the rigidity of the structure can be effectively enhanced, excessive deformation of the beam hinge and the column hinge is effectively prevented, and the structure has the potential of wide application and popularization.

The utility model discloses an anti-explosion connecting buckle which comprises a connecting buckle body, a diamond knot is arranged at one end of the connecting buckle body, a rope buckle is arranged at the other end of the connecting buckle body, a protective sleeve is arranged in the middle of the connecting buckle body, and a plurality of protruding parts are evenly distributed on the outer side of the protective sleeve in the circumferential direction. Cavities are formed in the positions, corresponding to the protruding parts, in the protection sleeve. According to the utility model, the protective sleeve is arranged on the connecting buckle body, and the convex part and the cavity are arranged on the protective sleeve, so that better deformation can be generated when the connecting buckle is subjected to tensile force, and therefore, the protective sleeve can be fully deformed when being extruded by external force, the extrusion force borne by the protective sleeve can be effectively dispersed, and the performance of the outer sheath is improved; and therefore, the connecting buckle body in the connecting buckle can be better protected, the connecting buckle body is prevented from being excessively worn, and the service life of the connecting buckle body is greatly prolonged.

A non-pneumatic tire comprises a negative Poisson's ratio unit arranged on a tire side wall, the negative Poisson's ratio unit is annular, the negative Poisson's ratio unit comprises first open holes and second open holes which are formed by hollowing out the tire side wall in the Y direction, the first open holes and the second open holes are alternately formed in the negative Poisson's ratio unit at intervals, and the first open holes and the second open holes are communicated with the negative Poisson's ratio unit. The first open hole and the second open hole are each in an isosceles triangle shape, the bottom edge of the first open hole is close to the outer ring of the negative Poisson's ratio unit and away from the inner ring of the negative Poisson's ratio unit, and the bottom edge of the second open hole is close to the inner ring of the negative Poisson's ratio unit and away from the outer ring of the negative Poisson's ratio unit. And the opening size of the first opening is smaller than that of the second opening.

The application relates to a preparation method of a high-toughness and strong-wear-resistant WC-Co coating and belongs to the technical field of thermal spraying cermet coating. Firstly, slurry mixed with WC powder, Co powder and an organic binder solution is sprayed and granulated to prepare spherical powder, then low-temperature heat treatment is carried out to obtain spherical WC-Co powder with certain cohesive strength, the spherical WC-Co powder is mechanically mixed with fine-particle boron nitride powder, high-temperature heat treatment is carried out above the eutectic point of WC-Co, WC-Co powder is separated through airflow classification, the powder after high-temperature heat treatment is deposited on the surface of a metal base through supersonic flame spraying, and a strong-wear-resistant WC-Co coating with nanocrystalline Co can be obtained. The application technology converts amorphous Co in a traditional coating into nanocrystals, improves the toughness of the coating and does not reduce the hardness of the coating.

This invention provides a high-temperature, high-pressure packer for variable well applications, relating to the field of oil and gas extraction technology. The packer includes an upper connector, a lower connector, a central tube, and a rubber sleeve assembly, a slip assembly, and an outer sleeve assembly arranged sequentially from top to bottom and abutting each other around the central tube. The slip assembly has a radially protruding flange near its lower end. The top of the outer sleeve assembly abuts against the flange. A gap is defined between the outer sleeve assembly and the central tube. Within this gap, a rubber sleeve drive assembly and a slip drive assembly are sequentially arranged from top to bottom. The rubber sleeve drive assembly abuts against the lower end of the slip assembly. The slip drive assembly drives the outer sleeve assembly upwards, thereby moving the lower end of the slip assembly upwards. The central tube has a first water inlet at a position corresponding to the rubber sleeve drive assembly and a second water inlet at a position corresponding to the slip drive assembly. This high-temperature, high-pressure packer for variable well applications, through its multi-stage drive mechanism and other structural features, enables the rubber sleeve to deform sufficiently, resulting in a tight seal.

The utility model discloses a buffering piece and a vehicle, the buffering piece comprises a connecting part and a deformable elastic part, the side wall of the connecting part is provided with threads suitable for being in threaded connection with a component; the elastic part is arranged at one end of the connecting part and connected with the connecting part, the end, away from the connecting part, of the elastic part is suitable for abutting against another component, and a part of the end, away from the connecting part, of the elastic part is sunken to form an avoiding groove. According to the buffering piece provided by the embodiment of the utility model, the buffering piece is arranged between the two parts, and the deformable elastic part is arranged at the end part of the buffering piece, so that the elastic part can be pressed to deform when the two parts are close to each other, and energy generated by mutual impact of the two parts is absorbed; the two parts are prevented from being damaged or deformed due to mutual impact; according to the buffering piece, the avoiding groove is formed in the pressed end of the elastic part, so that the avoiding groove can provide space allowance for deformation of the elastic part, stress of the elastic part can be prevented from being excessively concentrated, and the service life of the buffering piece is prolonged.

The application discloses a method for preventing shear cracking in the process of titanium alloy forging and drawing, which comprises the following steps: step one, heating titanium alloy ingot with a height-diameter ratio of not more than 2.5 to above the phase transition point, and performing first-time forging to obtain a forging blank with a size of a1*b1*l1; step two, heating the forging blank to 20-40 DEG C below the phase transition point, and performing final-time forging to obtain a forging piece with a size of a2*b2*l2, wherein the method for the final-time forging is as follows: adjusting the opening width k of the drawing die to the width a2 of the forging piece, loading the forging blank into the drawing die along the length direction, and performing slow pressing or impact deformation through the upper anvil. The method can effectively improve the uniformity of the material, avoid shear deformation cracking in the process of forging and drawing, and is suitable for the technical field of metal material processing.

The invention discloses a preparation method of a high-strength and high-plasticity Ti-Al-Nb alloy plate for an aerospace craft, which comprises the following steps: 1, sequentially heating, preserving heat and forging a Ti-Al-Nb alloy ingot at different temperatures to obtain a Ti-Al-Nb forged plate blank; secondly, the Ti-Al-Nb forged plate blank is rolled after being heated and subjected to heat preservation, and a Ti-Al-Nb alloy hot-rolled plate is obtained; and thirdly, the Ti-Al-Nb alloy hot-rolled plate is subjected to solid solution and aging treatment. According to the preparation method, the finished product is obtained by combining the forging and rolling process with the solid solution aging heat treatment, the preparation efficiency of the Ti-Al-Nb alloy is fully improved and the performance of the Ti-Al-Nb alloy plate is improved by strictly controlling the hot working and heat treatment parameters, so that the prepared Ti-Al-Nb alloy plate has relatively high plasticity and excellent comprehensive mechanical properties, and the prepared Ti-Al-Nb alloy plate is suitable for large-scale production. The method is suitable for aerospace and other fields.

The invention provides a magnesium alloy forge piece and a preparation method thereof, and belongs to the technical field of magnesium alloys. Electromagnetic semi-continuous casting is adopted, the temperature field gradient of the melt can be reduced, the purity and uniformity of the melt are improved, the solidification structure is refined, and the surface quality of the cast ingot is improved; in the first fire of multi-directional forging cogging, a high forging temperature is adopted to prevent plastic deformation and cracking of the cast ingot, the cast ingot is fully deformed through multi-directional forging, casting defects such as shrinkage cavities, air holes and looseness in the cast ingot are reduced, and the cast ingot with a uniform structure is obtained; in the second fire, the forging temperature is reduced, and a multi-directional forging process is adopted, so that the aims of fully refining magnesium alloy grains and obtaining a homogeneous fine-grain blank for die forging are fulfilled; the forging starting temperature of die forging is designed to be low 450-480 DEG C, water cooling is rapidly carried out after die forging is finished, recrystallized grains are effectively restrained from growing, and a fine-grain forged piece is obtained. And then aging treatment can improve the mechanical property and heat resistance of the magnesium alloy forge piece.

The present invention discloses a sealing device for an ultra-high dynamic pressure chamber, wherein an annular gap is provided between the outer peripheral edge of the inner end portion of a base and the inner peripheral wall of the chamber opening, an elastic sealing ring assembly for sealing the annular gap is sleeved in the annular gap, and a top cover for pressing the elastic sealing assembly is provided on the inner end portion of the base, the outer peripheral edge of the top cover is close to the inner peripheral wall of the chamber opening, an annular protrusion coaxially arranged therewith is provided on the end surface of the top cover away from the base, the outer peripheral edge of the annular protrusion is spaced apart from the inner peripheral wall of the chamber opening, and the annular protrusion is arranged corresponding to the annular gap along the radial direction of the top cover, the annular protrusion is gradually inclined toward its outer peripheral side in the direction axially away from the top cover, the outer end portion of the base is abutted against a latch body, and the annular protrusion is provided so that ultra-high pressure impact gas converges toward the center of the top cover, and the gas pressure impacting the top cover and the annular gap is gradually reduced, thereby indirectly enhancing the sealing effect of the entire device.

The present application provides a limit assembly for a shelf, which belongs to the field of logistics warehousing technology. Aiming at the problem that the limit assembly for the shelf cannot be restored after deformation, resulting in high maintenance costs and affecting the structural safety of the shelf, the present application provides a limit assembly for the shelf, including a baffle and connecting pieces arranged at both ends of the baffle, the connecting pieces are used to be fixedly connected to the shelf; the baffle is made of elastic material, and the connecting piece is made of rigid material; the two ends of the baffle are fixedly connected to the shelf through the connecting piece, at least one side of the baffle is set as a blocking surface, and the end of the baffle is movable relative to the connecting piece in the extension direction of the baffle; the baffle has an initial state when the blocking surface is not subjected to external force, when the blocking surface is subjected to external force, the baffle deforms so that the two ends of the baffle move respectively relative to the connecting piece, and when the external force is less than the rebound force of the baffle, the baffle returns along the deformation path and returns to the initial state. The present application reduces the frequency of damage and replacement of the limit assembly.

The utility model relates to a draught fan soft connector with a leak-proof function, which comprises a draught fan soft connector body, the draught fan soft connector body comprises two symmetrically arranged connecting flange plates and a soft connector body fixedly arranged between the two connecting flange plates, a reinforcing structure is arranged between the two connecting flange plates, and the two connecting flange plates are fixedly connected with the soft connector body. A shielding structure is arranged outside the soft connector body; the reinforcing structure comprises a reinforcing rod penetrating through the interiors of the two connecting flange plates and locking nuts connected to the two ends of the reinforcing rod in a threaded mode. And the shielding structure comprises a shielding sleeve which is sleeved outside the soft connector body and a tightening assembly which is arranged on the shielding sleeve and is used for folding the end part of the shielding sleeve. According to the fan soft connector with the anti-leakage function, through installation and use of the reinforcing structure and the shielding structure, the connection toughness of the fan soft connector body can be improved, the soft connector body can be effectively protected, and the advantages of being high in practicability, good in protection effect and the like are achieved.

This invention relates to the field of linear guide slider technology, and more particularly to a high-sealing linear guide slider used in linear transmission modules. It includes a slider and a linear guide for adapting to the slider. The slider is mounted on the upper end of the linear guide, and slider mounting seats are mounted on both sides of the slider. A sealing component is mounted on the inner side of one end of each slider mounting seat, and a telescopic spring is mounted on one end of the sealing component. A sealing ring is installed between the slider and the slider mounting seat. The sealing ring includes a limiting ring for connecting with the slider. An annular gasket is fixedly connected to one end of the limiting ring, and an annular groove with a triangular cross-section on one side is formed at the end of the annular gasket away from the limiting ring. In this invention, the annular groove forms a double-sealed cavity after compression, preventing the height difference between the slider and the slider mounting seat from decreasing. When the rubber ring is compressed, the annular groove can deform sufficiently, avoiding deformation of the parts due to compression.

The invention discloses a method for controlling surface cracks of microalloy sulfur-containing steel, which belongs to the field of metallurgy and specifically comprises the following steps of: (1) increasing the cooling water quantity of a second section and a third section of a continuous casting secondary cooling area; (2) heating the continuous casting billet by adopting a heating furnace, wherein the specific heating process parameters are as follows: the temperature of a preheating section of the heating furnace is controlled to be 650-850 DEG C; the temperature of the first heating section is controlled to be 950-1150 DEG C; the temperature of the second heating section and the temperature of the soaking section are controlled to be 1220-1250 DEG C; the total heating time of the heating furnace is 5-6 hours; (3) a double-roller reversible rolling mill is adopted, reciprocating rolling is carried out, during rolling, the initial rolling temperature is controlled to be 1050-1170 DEG C, and the final rolling temperature is controlled to be 950-980 DEG C; (4) controlling the temperature of the rolled continuous casting billet in a cooling bed to be 500-550 DEG C, carrying out pit-entering heat preservation after rolling, controlling the pit-entering temperature to be 300-650 DEG C, carrying out pit cooling for more than or equal to 36 hours, and discharging the continuous casting billet out of a pit at the temperature of 200 DEG C or below; according to the method, by increasing the secondary cooling water distribution amount and adjusting the temperature, the longitudinal cooling non-uniformity of the continuous casting blank is improved, and initiation and extension of casting blank cracks are effectively reduced.

The utility model discloses a pot liner and a cooking utensil, the pot liner comprises a pot body and a bottom plate, and the pot body comprises an arc-shaped bottom wall part; the bottom plate is arranged on the outer side of the pot body and covers at least the bottom wall part of the pot body, the bottom plate comprises a bottom plate body and a plurality of bottom plate notches formed in the bottom plate body, each of the plurality of bottom plate notches extends from the top edge of the bottom plate to the bottom center part of the bottom plate body, the plurality of bottom plate notches are arranged in the circumferential direction of the bottom plate at intervals, and the bottom plate notches are communicated with the bottom plate body. And blade parts are formed between the adjacent bottom plate notches of the bottom plate body. According to the utility model, the large plane of the bottom plate is divided into a plurality of small planes, and the stress is expanded from a single large edge to a plurality of edges. Therefore, the stress condition of the arc-shaped compound bottom position of the bottom plate can be changed during compounding, so that the bottom plate can be fully deformed, stress concentration is effectively reduced, and cracking of the edge of the bottom plate caused by stress concentration is avoided. And the bottom plate is one piece and can be integrally formed at one time during bottom compounding, and the process is simple and reliable.