32results about How to "Reduce forging process" patented technology

The invention relates to a wind-powered main shaft forging method. The wind-powered main shaft forging method comprises the following steps of inspecting a material; heating the material; taking out a blank which is formed by annealing the material for the first time, pre-forging, upsetting, drawing and printing the blank, performing pre-forging to form the blank, and blanking; finally forging the blank to form a main shaft by annealing for the second time, forging a flange end on a hollow rotary worktable, and drawing the main shaft until a shaft body has forging size; performing re-crystallization normalized tempering thermal treatment by using a one-time thermal loading furnace after forging the wind-powered main shaft; roughly turning the wind-powered main shaft and detecting flaws through ultrasonic wave; hardening and tempering the wind-powered main shaft, and performing nondestructive inspection and physical and chemical inspection on the wind-powered main shaft; finely turning the wind-powered main shaft; and packaging the wind-powered main shaft. The wind-powered main shaft forging method provided by the invention has the characteristics that the efficiency is high, the energy is saved, the cost is reduced, and the forging quality is improved.

The invention relates to a short-flow casting and rolling composite forming method for a ferrule piece, which belongs to a machining and forming method for a large-sized ferrule piece and mainly overcomes the technical difficulty that the conventional rolling method has high material waste and serious energy waste. The invention adopts the technical scheme that the short-flow casting and rolling composite forming method for the ferrule piece comprises the steps of alloy melting, molten steel refining, centrifugal casting of a ring blank, hot rolling and expanding, rough machining, heat treatment and finish machining, wherein the molten steel refining refers to external refining with an LF furnace and argon stirring to obtain high-purity molten steel; the centrifugal casting of the ring blank comprises that the refined molten steel is centrifugally cast at the temperature of 1,600 DEG C to form the ring blank, and meanwhile the cast blank grains are thinned by adopting electromagnetic stirring; and the hot rolling and expanding comprise that when the ring blank casting is solidified and the temperature drops to initial forging temperature of 1,200 DEG C, the rolling and expanding are directly performed on a rolling and expanding machine, the feeding amount is controlled during rolling and expanding, and the rolling-expanding ratio is 2 to 3.

The invention relates to a retaining ring short-flow manufacture technology, and belongs to the electroslag technology field. <{EN2}>The method comprises the steps of A) electroslag hollow steel pipe, namely employing electroslag continuous casting mobile core rod production principle, i.e. consumable electrode for continuously uniform fusing, so that a slag surface rises continuously to start an ingot device after reaching a predetermined height, so as to tract the hollow steel ingot move downwards slowly; the tract speed is in direct proportion with the consumable electrode fusing speed, and the two speeds are balanced; after melting, the steel ingot and the core rod are lifted; the core rod is taken out and the hollow steel pipe retaining ring is completed; B) pulling; C) solid melting; D) mechanical processing, namely processing the internal and external surface of a blank and two transverse planes until ho black dots appear; E) cold expansion, namely deforming the retaining ring by means of hydraulic pressure by using a water press over 8000ton through a special die to obtain a retaining ring that has a high strength that is larger than or equal to 1000 Mpa; F) tempering, namely employing insulating the retaining ring between 35- DEG C and 400 DEG C for a long time after cold expansion to eliminate the deformation pressure.

The invention aims at the defects of complex manufacturing process and large energy consumption for producing plates by using the pouring die and the production method in the prior art and provides a production method of corrosion resistant alloy plates and a split type pouring die used by the same. A die body is composed of a half square cylinder-shaped female die and a half square cylinder-shaped male die, the female die and the male die are combined to form a square cylinder-shaped die cavity by a female die matching surface and a male die matching surface, and the female die and the male die are fastened into a whole by a fastening device. The production method comprises the following steps of: carrying out vacuum pouring to obtain a rough plate blank by adopting the split type pouring die, removing oxide skins and feed heads for the rough plate blank to obtain a plate blank, and rolling the plate blank to obtain the plate. According to the split type pouring die and the production method, because the shape of an inner cavity of the die body is in consistent with the plate blank shape required by the plate, the rough plate blank formed by pouring can become the required plate blank so long as the oxide skins and the feed head are removed, the forging process is saved, and the processing cost is reduced by 20%.

The invention discloses an electroslag smelting and casting sector-plate special-shaped crystallizer, and belongs to the technical field of crystallizers. The electroslag smelting and casting sector-plate special-shaped crystallizer is composed of a front portion and a rear portion which are symmetrical. Taking the front portion as an example , the front portion is composed of an inner cavity shaping plate, an outer cavity shaping plate, a water discharging pipeline and a water feeding pipeline. When the electroslag smelting and casting sector-plate special-shaped crystallizer is used, the front portion and the rear portion are connected together through nuts in the mode that bolts penetrating through bolt holes A, and a plurality of electroslag smelting and casting sector-plate special-shaped crystallizers can be stacked for use in the vertical direction. After the front portion and the rear portion are combined, a cavity is formed by the inner cavity shaping plate, wherein the left side and the right side of the cavity are parallel, and the upper side and the lower side of the cavity are respectively in an arc shape; the outer cavity shaping plate has the same shape as the inner cavity shaping plate, a water trough is located between the inner cavity shaping plate and the outer cavity shaping plate, and the thickness of the water trough ranges from 15 mm to 25 mm. The lower portion of the outer cavity shaping plate is provided with a water feeding pipe, the upper portion of the outer cavity shaping plate is provided with a water discharging pipe, the water feeding pipe is connected with the water feeding pipeline, the water discharging pipe is connected with the water discharging pipeline, and the water feeding pipeline is further provided with a sewage discharging hole. The electroslag smelting and casting sector-plate special-shaped crystallizer has the advantages that the number of forging procedures is reduced, production procedures are simplified, and production cost is reduced.

The invention discloses a manufacturing method of a molybdenum target tube material. The method is that molybdenum powder is used as the raw material. The method comprises the steps of preparing a molybdenum ingot; mechanically processing for the first time; extruding; thermally processing; mechanically processing for the second time to obtain the final product. The method has the advantages of being simple in process, low in production cost, high in purity of target material, high in density, low in oxygen content, large in length, uniform in structure, and small in crystal grains.

The invention relates to a wind-powered main shaft forging method. The wind-powered main shaft forging method comprises the following steps of inspecting a material; heating the material; taking out a blank which is formed by annealing the material for the first time, pre-forging, upsetting, drawing and printing the blank, performing pre-forging to form the blank, and blanking; finally forging the blank to form a main shaft by annealing for the second time, forging a flange end on a hollow rotary worktable, and drawing the main shaft until a shaft body has forging size; performing re-crystallization normalized tempering thermal treatment by using a one-time thermal loading furnace after forging the wind-powered main shaft; roughly turning the wind-powered main shaft and detecting flaws through ultrasonic wave; hardening and tempering the wind-powered main shaft, and performing nondestructive inspection and physical and chemical inspection on the wind-powered main shaft; finely turning the wind-powered main shaft; and packaging the wind-powered main shaft. The wind-powered main shaft forging method provided by the invention has the characteristics that the efficiency is high, the energy is saved, the cost is reduced, and the forging quality is improved.

The invention relates to the technical field of forging, and discloses a free forging forming process and die for large bent knife plate forgings. The method comprises the following steps of firstly performing high-temperature free forging forming by using a convex anvil by taking a rectangular billet as an initial blank to obtain a strip-shaped blank with a dumbbell-shaped section; secondly, cutting the long-strip-shaped blank along the center line, and obtaining two prefabricated blanks which are different in thickness on the two sides and are in smooth transition; and thirdly, using a freeforging and finish forging drawing-out die with a flow guide groove and asymmetric baffles on the two sides for conducting high-temperature forging drawing-out on the cut prefabricated blank, the material thickness of the outer side area of the prefabricated blank is reduced, the prefabricated blank extends in the feeding direction, the prefabricated blank is forced to be bent inwards, and therefore the large bent knife plate forgings are obtained through forming. By means of the free forging forming process and die, forging forming of the large bent knife plate forgings is achieved, the forging performance and the material utilization rate can be improved, the equipment load is reduced, the forging forming effect is improved, and the production efficiency is improved.

The invention relates to a pouring method for a large-section consumable electrode. The pouring method has the requirement that an electrode blank is frustum-shaped, the diameter of the lower end is smaller than that of the upper end, and the height is 2000-6000mm; the length of an ingot mould is 38-42mm larger than that of the electrode blank, the inner diameter of an upper opening of the ingot mould is 815-835mm, and the inner diameter of a lower opening is 805-825mm; and the steel type of a steel ingot is any one of S44SY, H13 and TSM166. The pouring method includes the following steps sequentially that I. the pouring temperature is 60-80 DEG C higher than that of a liquid phase wire, argon sealing protection is adopted in pouring, and the temperature of the ingot mould is 50-100 DEG C; II. composite slag is poured in a protection mode in the protection slag pouring process with the adding quantity being 15.6-16.4 kg / piece; III. a heat generating agent is gently added when the portion of a rise with 0.64-0.70 of the weight of the riser is poured in the riser pouring process, and the adding quantity is 11.8-12.2 kg / piece; and IV. the pouring time of the an ingot body is 16-19min, and the pouring time of the riser is 7-10min. The pouring method for the large-section consumable electrode reduces the working procedure of rolling or forging and reduces production cost.

The invention discloses a gear forging die, and relates to a die. The gear forging die particularly comprises a base, a workbench, a lower die and an upper die; the workbench is installed on the basethrough support legs, the lower die for gear forging is installed on the workbench, and four corners of the top surface of the workbench are correspondingly and fixedly connected with the bottom surface of a top plate through support rods; a punch hammer used for forging work is installed in the middle of the bottom face of the top plate through a hydraulic cylinder, vertical connecting rods are slidably installed at the four corners of the top plate correspondingly, the top ends of the connecting rods are fixedly connected with the four corners of the bottom face of a lifting plate correspondingly, and the bottom ends of the connecting rods are fixedly connected with the four corners of the top face of a mounting plate correspondingly; the mounting plate is located below the punch hammer;and the upper die for gear forging is installed on the bottom surface of the mounting plate. According to the gear forging die and the forging process thereof, in the implementation process, the gearcan be formed at a time through the matching effect of the upper die, the lower die and a sliding block, and the gear forging forming process is effectively reduced.

The invention discloses an ordinary press machine blocking forging tool set which comprises a tool set support and a die forging punch penetrating the upper end of the tool set support and being capable of vertically reciprocating. A die assembly mechanism and a lateral pressing mechanism are further arranged on the tool set support, wherein the die assembly mechanism and the lateral pressing mechanism are driven by the die forging punch. Due to the fact that a purely mechanical structure is adopted, and a cone-shaped surface machined on the punch is used for controlling separation and closing of a die, the ordinary press machine blocking forging tool set has the advantages of being capable of simplifying a transmission structure, effectively reducing development cost, solving the technical problems of complex structure and high development cost of a common blocking forging tool set and influences of leakage and temperature on product quality, enlarging application range of blocking forging, effectively reducing forging processes, saving energy, obviously improving utilization of materials, and reducing product cost.

The invention discloses a machining method for effectively improving quality of a large forging, belongs to the technical field of smelting and forging, and belongs to an improvement on the smelting and forging of the large forging. The method comprises the steps of firstly, in the smelting process, prefabricating a water gap jaw in the water gap end of an ingot, so the distribution state of water gap deposition cones is changed and the metallurgical quality of the ingot is improved; secondly, adopting riser-free forging in the forging loop and changing the fiber direction of the forging, so the forging quality of the ingot water gap is effectively improved. Through the improvement on the smelting and forging, the hot-working quality of the large forging is effectively improved.

The invention relates to a thick-walled super 13Cr seamless steel pipe with a yield strength of 125 steel grade and a production method. The properties of the seamless steel pipe are: tensile strength ≥ 896 MPa, Rp0.2 yield strength 862-1034 MPa, elongation ≥ 12% . The production method of seamless steel pipe is: ⑴ electric furnace smelting + continuous casting to produce super 13Cr billet; ⑵ billet annealing to reduce hardness; ⑶ billet processing to remove surface scale, center looseness and cracks; ℃, hot extrusion molding; ⑸ preheating treatment, steel pipe heating 960 ℃ ~ 1010 ℃, blowing to cool to room temperature; ⑹ heating 960 ℃ ~ 1010 ℃, quenching oil rapid cooling, reheating 560 ℃ ~ 610 ℃, tempering treatment, Get super 13Cr steel pipe with 125 steel grade properties. The invention improves the finished product rate and quality of the seamless steel pipe and reduces the production cost. The seamless steel pipe has good surface quality, high mechanical properties after oil quenching heat treatment, high strength and good toughness.

The invention discloses a cast steel matrix for a process for preparing a forging mould through double-layer build-up welding and a preparation method thereof. The cast steel matrix is prepared from the following materials in percentage by element content: 0.2-0.35% of carbon, 0.1-0.5% of silicon, 1.0-1.8% of manganese, not more than 0.01% of phosphorus, not more than 0.01% of sulfur, 0.3-0.8% of chromium, 0.1-0.8% of nickel, 0.1-0.5% of molybdenum, not more than 0.5% of copper and the balance of iron; and the cast steel matrix is obtained by a tempering after normalizing process, wherein the normalizing temperature is within 980-1020 DEG C, the tempering temperature is within 550-600 DEG C, and the thermal insulation time is determined according to the size of a mould. The cast steel matrix prepared by the method disclosed by the invention can simultaneously greatly meet performance requirements of the forging mould on hardness, strength and two aspects, such as ductility and toughness, and also has excellent welding property.

The invention relates to a pouring method of an electrode blank. Its requirements are: the electrode blank is in the shape of a truncated cone, the diameter of the lower end is greater than the diameter of the upper end, and the height is 3640-4240mm; the length of the ingot mold is 38-42mm longer than the electrode blank, The inner diameter of the mouth is 546-566mm; the inner diameter of the lower mouth is 580-600mm; the pouring method includes the following sequential steps: Ⅰ Pouring temperature: 60-80°C higher than the liquidus temperature, protected by argon seal during pouring, and the temperature of the ingot mold is 50-100°C. Ⅱ The pouring mold slag is poured with composite slag, and the addition amount is 7.8-8.2kg / piece; Ⅲ When the cap mouth is poured to 0.64-0.70 of the weight of the cap mouth, gently add heating agent, the amount added is 5.8-6.2? kg / piece. Ⅳ The pouring times are as follows: Pouring time for the ingot body? 9'-11': The pouring time of the cap mouth? 5'-7'. The pouring method of the electrode blank reduces the rolling or forging process, shortens the preparation time of the electrode blank, and saves the cost.

The invention discloses a continuous casting production method of a titanium-containing austenitic stainless steel round tube blank for a seamless steel tube. The continuous casting production method comprises the specific steps as follows: before AOD steel blending, 5-20kg carburetant per ton of steel is added according to steel tapping components of an electric furnace, and the carbon content is not less than 2.0% at AOD initial stage; AOD is carried out; reduction desulfurization is carried out, silicoferrite is added for reduction, lime and fluorite are added for slag making desulfurization, and after the reduction desulfurization is finished, slag removal is carried out in an AOD furnace; deep deoxidization is carried out; steel tapping and titanium alloying are carried out, after the deep deoxidization is finished, the steel tapping is carried out, and ferrotitanium is added along with a steel flow in a steel tapping process; LF heating is carried out; calcium treatment is carried out, silicon-calcium wires are fed to molten steel by a wire feeding machine, and the feeding quantity of pure calcium is 0.2-0.8kg per ton of steel; soft blowing is carried out; and round blank continuous casting is carried out, after the soft blowing is finished, a steel ladle is moved to a continuous casting station for pouring, and the continuous casting round tube blank is produced by using a round blank crystallizer. With the adoption of the continuous casting production method, sequence casting is realized; the yield is increased; a forging procedure is saved; the production cost is low; and the economic benefits are high.

The invention belongs to the field of forging thermal processing, and specifically relates to a method for improving the uniformity of the structure of a GH4169 disc forging; the invention can realize forming by adopting two-fire forging, and the invention adopts an "M"-shaped upper mold cavity and a lower mold cavity It is in the shape of "W", the mold and the final forging die ensure that the minimum equivalent strain in the final forging process is not less than 0.25, and the billet is made by die forging. The forging temperature is controlled at 980 ° C ~ 1020 ° C, and the forging rate is controlled at 1 mm / s ~ 20 mm / s, the mold heating temperature is controlled at 300°C to 500°C; sand blowing and grinding are used to remove surface defects such as scale and forging cracks on the surface of the prefabricated billet; finally, the final forging of the disc forging is performed, and the forging temperature is controlled at 990°C to 1010°C. The forging rate is controlled at 0.5mm / s-5mm / s, and the mold heating temperature is ≥350°C; the method of the invention can effectively improve the uniformity of the structure of the GH4169 plate forging, and further improve the consistency of the performance of different parts of the forging.

The invention aims at the defects of complex manufacturing process and large energy consumption for producing plates by using the pouring die and the production method in the prior art and provides a production method of corrosion resistant alloy plates and a split type pouring die used by the same. A die body is composed of a half square cylinder-shaped female die and a half square cylinder-shaped male die, the female die and the male die are combined to form a square cylinder-shaped die cavity by a female die matching surface and a male die matching surface, and the female die and the male die are fastened into a whole by a fastening device. The production method comprises the following steps of: carrying out vacuum pouring to obtain a rough plate blank by adopting the split type pouring die, removing oxide skins and feed heads for the rough plate blank to obtain a plate blank, and rolling the plate blank to obtain the plate. According to the split type pouring die and the production method, because the shape of an inner cavity of the die body is in consistent with the plate blank shape required by the plate, the rough plate blank formed by pouring can become the required plate blank so long as the oxide skins and the feed head are removed, the forging process is saved, and the processing cost is reduced by 20%.

The invention relates to a retaining ring short-flow manufacture technology, and belongs to the electroslag technology field. <{EN2}>The method comprises the steps of A) electroslag hollow steel pipe, namely employing electroslag continuous casting mobile core rod production principle, i.e. consumable electrode for continuously uniform fusing, so that a slag surface rises continuously to start an ingot device after reaching a predetermined height, so as to tract the hollow steel ingot move downwards slowly; the tract speed is in direct proportion with the consumable electrode fusing speed, and the two speeds are balanced; after melting, the steel ingot and the core rod are lifted; the core rod is taken out and the hollow steel pipe retaining ring is completed; B) pulling; C) solid melting; D) mechanical processing, namely processing the internal and external surface of a blank and two transverse planes until ho black dots appear; E) cold expansion, namely deforming the retaining ring by means of hydraulic pressure by using a water press over 8000ton through a special die to obtain a retaining ring that has a high strength that is larger than or equal to 1000 Mpa; F) tempering, namely employing insulating the retaining ring between 35- DEG C and 400 DEG C for a long time after cold expansion to eliminate the deformation pressure.

The invention relates to a method for molding a large ring piece by casting blank ring rolling, belonging to a method for processing and molding a large metal ring piece. The invention mainly solves the technical difficulty of more material waste and serious energy waste of the existing ring rolling method. The method has the technical scheme that the method for molding the large ring piece by casting blank ring rolling comprises the steps of alloy melting, refining, casting ring blank, casting blank ring rolling, rough processing, heat treatment and finishing; the refining means that an LF furnace is used for external refining, molten steel content and temperature are rapidly homogenized by argon blowing stirring, so that molten steel with high purity can be obtained; the casting ring blank means that when the temperature of the refined molten steel is reduced to 1580-1600 DEG C, self-hardening sand molding pouring is adopted to obtain a ring-shaped casting blank; and the casting blank ring rolling means that the ring-shaped casting blank is heated to 1100-1200 DEG C and is treated by ring rolling on a ring rolling machine, the feeding amount is controlled, and the ring rolling ratio is 2-3.

The invention relates to a no-riser and no-ingot tail forging method for a large-scale wind power main shaft; before heating and forging, a riser and a ingot tail of a steel ingot are cut off by a saw, then a jaw of pliers of a manipulator is used for clamping the steel ingot without the riser and the ingot tail, and then the processes of upsetting, drawing out, rolling circle, forging steps and upsetting flange are carried out; the jaw of the pliers of the manipulator includes pliers arms (2), sleeve seats (4) and ball-head cylinders (5); the number of the pliers arms (2), the sleeve seats (4) and the ball-head cylinders (5) is two, one piece is at the left and the other piece is at the right, one end of the left pliers arm (2) is articulated with one end of the right pliers arms (2) by a gemel (1), the other ends thereof are respectively provided with the left sleeve seat (4) and the right sleeve seat (4), the left ball-head cylinder and the right ball-head cylinder (5) are respectively pass through the left sleeve seat (4) and the right sleeve seat (4); the ball-head ends of the left ball-head cylinder and the right ball-head cylinder (5) are arranged at the inner sides of the left sleeve seat (4) and the right sleeve seat (4) in a left and right antithetic manner, and the other ends thereof are provided with a fixed pin (6) by inserting along the radial direction. The method of the invention can reduce forging processes, improve production efficiency, shorten forging time and enhance forging precision and forging quality.

The invention relates to a manufacturing method of a magnetic material 1J85 hot-rolled steel strip. The manufacturing method comprises the following steps that 1J85 alloy is smelted by a vacuum furnace, a variable-width ingot mold is poured into a flat ingot in a vacuum mode after the smelting is finished, the flat ingot is subjected to surface milling and then heated, and then the flat ingot is rolled through a reversible rolling mill. According to the manufacturing method, the 1J85 hot-rolled steel strip is produced by adopting a process which is directly hot-rolled without a forging process, the production efficiency is improved, and the production cost is saved.