37results about How to "Reduce fire times" patented technology

The invention provides a cogging forging method. The cogging forging method includes the following steps of 1, forging heating, wherein a proper heating technology is formulated according to the heat conductivity of a material and changes of the specific heat capacity, and it is guaranteed that the center of a forging is completely forged so that the plasticity of the forging can be improved and the deformation resistance of the forging can be reduced; 2, blank cogging forging, wherein the upsetting process and the drawing-out process are specifically carried out so that the overall uniformity of the forging can be improved, and regions which are difficult to deform can be eliminated; 3, forging melting-down heating, wherein when the temperature of the forging is lower than 800 DEG C, forging is stopped, and the melting-down heating process is carried out; 4, molding, wherein a steel ingot is forged to be in a target forging shape; 5, post-forging heat treatment of the forging. According to the cogging forging method, the regions which are difficult to deform in the cogging process are eliminated, and the strain uniformity of the center of the forging is improved; due to a combined cogging tool, the upsetting process and the drawing-out process are rapidly switched, the heating number required during cogging forging is decreased, the forging cost is reduced, and the production efficiency is improved.

The invention relates to a method for forging 500-Kg-level GH3230 high-temperature alloy. According to the method, as the initial forging temperature is increased to 1200+/-10 DEG C, the problems that as the transferring time is excessively long, the initial forging temperature is excessively low, and the forging interval is reduced accordingly are solved, the crack possibility is greatly reduced due to the increasing of the initial forging temperature, and a follow-up damage repairing step is avoided; meanwhile, the forging interval between the initial forging temperature and the final forging temperature is increased by 180 DEG C to 210 DEG C; as the forging interval is increased, the one-time pressing amount is greatly increased, and the heating number is effectively decreased accordingly; meanwhile, as the end of a forge piece is wrapped by heat preservation cotton, the temperature of the end of the forge piece is lower than the temperature of the end which is not wrapped by the heat preservation cotton due to the heat insulation effect of the heat preservation cotton, the time when the end, wrapped by the heat preservation cotton, of the forge piece is in the high temperature state is short accordingly, and the problem that as the end of the forge piece is not deformed, grains are thick and large can be solved.

The invention relates to a method for forging and pressing a semi-coupler with a large section and a high height-diameter ratio by using a 31.5 MN of oil press. A forging process route comprises the following steps of: upsetting; drawing; locally upsetting and forming by using a drain cap which is 1640 mm in outside diameter phi, 1100 mm in inside diameter phi and 310 mm in thickness; and thermally treating after forging: after forging a forged piece and air-cooling the forged piece till the surface temperature is 350+/-10 DEG C, putting the forged piece in a thermal treatment furnace, controlling the temperature of the treatment furnace at 450-500 DEG C, after keeping the temperature for 3 h, cooling to 280+/-20 DEG C with the furnace and keeping the temperature for 6 h, carrying out first super-cooling treatment, then raising the temperature to 650+/-10 DEG C and keeping the temperature for 6 h, then raising the temperature again to 890+/-10 DEG C, keeping the temperature and carrying out austenitizing treatment, lifting off a trolley, air-cooling through a fan, carrying out normalization treatment, air-cooling the forged piece till the surface temperature is 350+/-10 DEG C and putting the forged piece in the furnace, cooling the furnace to 260+/-20 DEG C and keeping the temperature for 7 h, carrying out second super-cooling treatment, raising the temperature to 650+/-10 DEGC and keeping the temperature for 40 h, tempering, carrying out diffusion hydrogen and white point resistant treatment, cooling the forged piece with the furnace till the temperature is less than or equal to 250 DEG C, and taking out the forged piece from the furnace. The method disclosed by the invention is simple in process, fewer in heating frequency and lower in energy consumption. The quality of the forged piece can be obviously ensured.

The invention discloses a manufacturing method for titanium and titanium alloy products by coating and forming, wherein the needed devices during a production process comprise an electric furnace, a forming machine and an infrared thermometer. The manufacturing method comprises the following steps of coating by choosing steel or pure titanium; selecting single-layer coating or double-layer coating; performing blank verification, oxidation resistance, lubrication and heating before forming, and preheating a die to be about 200 DEG C before forming; rapidly transferring the heated coated blanks onto a pressure machine for forming, and forming by 1-2 heating numbers; and measuring the temperatures of the surfaces of the blanks by the infrared thermometer during the forming process, so as to ensure that the temperatures of the blanks are always kept in a titanium alloy hot-forming temperature range during forming, and finally obtaining the titanium and titanium alloy products. Hemispherical shells manufactured by the manufacturing method disclosed by the invention meet requirements on various technical indexes with low manufacturing cost; the forming heating numbers are reduced to be 1-2 from the previous 2-3, so that the production efficiency is improved and the production cost is reduced; and the thinning rate of the material is reduced, and the utilization ratio of the material is increased.

The invention provides a method for thick-wall three-way hot-press axial compensation forming with quartz powder as a pressure transmission medium. The method comprises the following steps of (1), preparing a mold; (2), preparing a blank; (3) preparing a special solid filler and performing charging, wherein 100-140 meshes of dry quartz sand serve as the main special solid filler, dry graphite powder with the weight being 18% to 22% of the weight of the dry quartz sand is added, and the special solid filler is obtained through blending; and drying is performed before filler filling, then a pipe is filled with the filler and the filler is compacted under the pressure more than 200 T; 4), preparing a compensation baffle, 5), preparing equipment; 6), performing heating; 7), performing lubrication, wherein it must be guaranteed that the working face of the mold is lubricated completely during lubrication, and a lubricating coating which is at least 0.2 mm thick is formed; and 8), performing compaction forming. The method has the beneficial effects that operation is easy, the number of the working procedures is small, the production efficiency is high, the product wall thickness is even, the formed appearance is beautiful, the construction period is short, and the manufacturing cost is low.

The invention provides a positioning structure for a turbine blade blank, which can be used for solving the problems of non-uniform material flow and low material utilization ratio of a blank in a die forging process due to the absence of an effective positioning device for die forging of the conventional blank, can be used for effectively solving the problem of short service life caused by wear of a die, and contributes to lowering the production energy consumption and increasing the production efficiency. The positioning structure is characterized by comprising a forging die, wherein a material carrying table is arranged on the end part of the outer side of a leaf-crown-shaped cavity of a lower die forging module; a positioning lug is arranged on the top of a blank to be processed; the blank is arranged in the die cavity of the forging die; and the positioning lug of the blank is limited by using the material carrying table.

The invention discloses a process for performing non-oxidation technical transformation on a common medium-frequency forging furnace. The technical scheme adopted by the invention has the technical points that the common medium-frequency forging furnace consists of a nitrogen making machine, a nitrogen storage tank, a pipeline, a pressure gage, a circular ring-shaped air passage, more than four branch air passages and a furnace door, wherein the branch air passages are led to a hearth from the circular ring-shaped air passage, and the furnace body not only is normally closed but also automatically opens. Non-oxidation protection is performed on a to-be-heated workblank by nitrogen in the hearth, and the non-oxidation protection is also performed on the to-be-heated workblank by the nitrogen in a closed transporter from after the to-be-heated workblank is discharged from the furnace to before the to-be-heated workblank enters a forging die. The nitrogen can be charged to both ends from the middle of the hearth, also can be charged to the middle from both ends of the hearth, and also can be charged to the center of the hearth from one third of both ends of the hearth. The air passage can be integrated two sets of air passages and also can be an integrated single air passage. The air passage is made of a refractory material and is manufactured by using a special manufacturing process. The process has the application that the high-temperature non-oxidation technical transformation is performed on the medium-frequency forging furnace, and the goals that the energy is saved, the consumption is reduced and the cost is reduced are achieved.

The invention provides a method for improving the surface quality of a die forging. The method can obviously improve the surface quality of a forged forging and guarantee the magnetic powder inspection precision effect of the forging. The method is characterized in that the method comprises the following steps of (1) designing a forging die, (2) forging on a hot die forging device, (3) conducting surface cleaning on the forging after forging is finished and (4) conducting hot die forging shaping on the forging after surface cleaning, wherein in the step (1), the forging die is designed according to the medium tolerance of the thickness size envelope amount of the forging; in the step (2), during forging, collision die plates are placed on the two sides of a lower die cavity of the forging die and the closing height of the forging die during forging is controlled through the collision die plates so as to guarantee the thickness size of the forging; in the step (3), shot blasting and a local grinding and modifying method are adopted; in the step (4), the collision die plates are removed during hot die forging shaping.

The invention relates to an upsetting method of a battery pole piece roller, and belongs to the technical field of roller forging. According to the upsetting method of the battery pole piece roller, the battery pole piece roller comprises a roller body and a roller neck integrally formed at the two ends of the roller body, the diameter of the roller body is larger than that of the roller neck, andthe roller body is manufactured with a local upsetting method; during discharging, oddments are reserved at the root of the joint of the roller body and the roller neck; during upsetting, by means ofdrain caps, under the effect of inner holes of the drain caps, the reserved oddments flow, and the root of the roller body is formed; and an original roller body root blank flows to angles of the roller body, the angles are formed, and protrusions are generated. By means of the reserved oddments, the oddments flow during upsetting, it can be promoted that the edges finally deform to form right angles, large rounded angles are prevented from being formed, and normal product procedures are guaranteed. Compared with a traditional method, by means of the technological method, raw materials can besaved, the production cost can be reduced, and the utilization rate of the materials can be increased; and the heating number during upsetting can also be reduced, thus, the machining time is reduced, and the efficiency of overall machining is improved.

The invention relates to the technical field of metallurgy, and provides a steel ingot mold. The steel ingot mold comprises a steel ingot mold body. A pouring cavity which is vertically arranged and penetrates through the steel ingot mold body is formed in the steel ingot mold body. The pouring cavity is of a big-end-down structure or a big-end-up structure. The inner surface of the pouring cavity comprises four first planes which are arranged at intervals and second convex surfaces which are arranged between every two adjacent first planes and protrude towards the center of the pouring cavity 102. The second convex surfaces comprise second planes connected with the first planes and second arc surfaces connected between the two second planes. According to the steel ingot mold, a steel ingot with a cross-shaped cross section can be produced, when the steel ingot serves as a blank to forge a cross-shaped forge piece, the blank only needs to be subjected to upsetting operation through a special tool, compared with the prior art, rounding, chamfering, drawing-out and other operation are not needed, the heating number is saved, the forging period is shortened, and the forging efficiency is improved.

The invention belongs to the field of alloy forging, and particularly relates to a machining method of a GH4169 disc and shaft integrated forged piece. By adopting a forging mode of combining loose tooling forging with free forging, the eccentricity condition of a disc and a shaft is obviously weakened, the deformation of the forged piece is basically uniform, the brinell hardness of the forged piece can reach 438 at the room temperature after solid solution and aging heat treatment, the percentage elongation after fracture reaches 19.0%, the percentage reduction of area reaches 34%, material utilization rate of the forged piece is increased, and the risk of size scrap is basically eliminated.

The invention relates to a forming method for improving the structure uniformity of a titanium alloy bar by combining free forging and pulse current auxiliary extrusion, which comprises the following steps of: heating a titanium alloy ingot to temperature T1, performing upsetting and drawing deformation treatment A, and air-cooling the titanium alloy ingot to room temperature after the upsetting and drawing deformation treatment A is finished; and then heating the titanium alloy ingot to the temperature T3 for upsetting and drawing deformation treatment B, obtaining a titanium alloy forged bar after the upsetting and drawing deformation treatment B is finished, rapidly blowing and cooling the titanium alloy forged bar to the room temperature, conducting extrusion deformation treatment A, extrusion deformation treatment B and extrusion deformation treatment C on the obtained titanium alloy forged bar in sequence on pulse current auxiliary extrusion equipment, and air-cooling the obtained titanium alloy forged bar to room temperature after extrusion deformation treatment C to obtain the titanium alloy bar. The homogeneous high-strength titanium alloy bar is prepared by combining free forging and pulse current auxiliary extrusion, the microstructure uniform distribution and the mechanical property of the bar are improved, and the requirement for the performance of aerospace fasteners is met.

The invention relates to a low-cost forged titanium alloy material, a preparation method and application thereof. The material trademark of the titanium alloy is Ti-4Al-1Mo-1Cr-1Fe, and comprises thefollowing chemical components of, in percentage by weight, 2%-6% of Al, 0.6%-1.4% of Mo, 0.6%-1.4% of Cr, 0.6%-1.8% of Fe, and the balance Ti and inevitable impurities. During preparation, sponge titanium, pure aluminum, a ferro-molybdenum alloy and a ferro-chrome alloy are mixed according to the chemical composition ratio, then extruded into a consumable electrode for smelting, smelted into an ingot through a vacuum consumable electric arc furnace for more than two times, and forged to obtain the forged titanium alloy material. The Ti-4Al-1Mo-1Cr-1Fe titanium alloy has the advantages of low density, high strength, high plasticity, high elastic modulus, hot forging, hot rolling, cold forging and cold rolling process performance, and is suitable for a top cover and a bottom plate of a golfhead.

The invention relates to the field of profiling forging of large forgings, and discloses a forming method of large long-axis cross forgings and a forming device. In the method, a prefabricated blank does not need to be forged into a square section, so that the difficulty of the prefabricated blank is reduced; a mode of synchronously carrying out sectional material distribution and forging pressingis adopted, the material dividing part in the upper step of the blank is forged and pressed into a cross shape when a part of the blank is divided; and compared with a traditional mode of drawing after material dividing in the whole section, the method has the advantages that the required heating number is less, forging completed by two-time heating previously can be completed by one-time heating, the forging efficiency is high, and the defects of asymmetry and non-uniform shape caused to the forgings in the drawing process can be reduced.