692 results about "Steel casting" patented technology

The invention relates to the technical field of manufacturing of engineering machinery parts, and discloses an engineering machinery driving wheel made of a medium carbon alloy cast steel material. The invention also discloses a preparation process of the engineering machinery driving wheel material, which comprises the following steps: S1, casting treatment: melting the medium carbon alloy steel material, and casting into a driving wheel blank; s2, normalizing heat treatment: carrying out normalizing heat treatment on the driving wheel blank; s3, rough machining treatment; s4, quenching treatment: carrying out induction quenching treatment; and S5, finish machining treatment. The synergistic effect of alloy elements in a medium carbon alloy cast steel material is combined with an optimized air cooling process, so that the cast steel is normalized to obtain a uniform structure which mainly contains superfine pearlite and contains extremely little ferrite, the matrix hardness is stable, and the requirement of a high-performance driving wheel is completely met; after the process route is improved, tempering and shot blasting and flaw detection procedures after tempering are canceled; the technological process is greatly shortened, material turnover is reduced, and the production efficiency is improved.

The steering cast steel joint comprises a connecting bent pipe, a clamping structure and a bearing platform structure, an inserting channel used for installing a steel strand is formed in the connecting bent pipe, and the inner diameter of the inserting channel is larger than the outer diameter of the steel strand; the clamping structure is mounted on the steel strand; and the clamping structure is suitable for being clamped on the bearing platform structure to limit the steel strand, so that a mounting gap is formed between the steel strand and the inner wall of the insertion channel. The structure ensures that a mounting gap is formed between the steel strand and the inner wall of the insertion channel, the situation that friction is generated between the steel strand and the inner wall of the insertion channel, and consequently a coating on the surface of the steel strand is abraded is avoided, and the durability of the steel strand is improved.

The invention provides a method for improving homogenization of a bearing steel casting blank, belongs to the technical field of steel smelting processes, and solves the technical problems that in the continuous casting process of bearing steel, large-size compounds are easily formed due to high carbon and high chromium content, and micro segregation regulation and control of the bearing steel are difficult to solve by traditional electromagnetic stirring and soft reduction process parameters. According to the method for improving the homogenization of the bearing steel casting blank through soft reduction and tail end electromagnetic stirring coupling, a bearing steel continuous casting solidification mathematical model is established and corrected, and pouring condition technological parameters are input to provide basic data and boundary conditions for establishing the bearing steel continuous casting solidification heat transfer mathematical model; the method is applied to soft reduction process parameter design and is matched with adjustment of the tail end electromagnetic stirring position, the soft reduction technology and tail end electromagnetic stirring are coupled to be implemented, the solid fraction coupling rule between soft reduction and tail end electromagnetic stirring is determined, the homogeneity of a casting blank is jointly improved from the two dimensions of solidification structure and solute distribution, and center segregation is improved; and the structure uniformity is improved.

The invention provides low-temperature cast steel for polar ships and a heat treatment process of the low-temperature cast steel. The cast steel comprises the following chemical components in percentage by weight: 0.03-0.07% of C, 0.10-0.20% of Si, 1.3-1.5% of Mn, 3.0-4.0% of Ni, 0.80-1.00% of Al, 1.5-2.5% of Cu, not more than 0.05% of Cr and Mo, not more than 0.015% of S, not more than 0.020% of P and the balance of Fe and inevitable impurities. The cast steel has the advantages of ultra-large wall thickness, high strength, low-temperature high toughness, weldability, corrosion resistance and the like, and can meet the building requirements of polar region ship stem columns.

The present disclosure provides a high-vanadium high-speed steel and preparation method therefor, and use thereof, which relate to the technical field of high-vanadium high-speed steel. The preparation method includes: smelting raw materials to form a melt; impacting the melt to a cooling platform to form a high-vanadium high-speed steel casting billet; and performing a spheroidizing annealing treatment and a quenching and tempering treatment, so as to obtain a resultant. The spheroidizing annealing treatment includes: heating the high-vanadium high-speed steel casting billet to 820-910° C.; holding for 2-4 h; then cooling down to 450-550° C. at a cooling rate larger than 40° C. / h; and then air cooling to a room temperature.

The invention discloses a production method for improving cleanliness of a wear-resistant steel casting blank, and relates to the technical field of metal material smelting and continuous casting. The method comprises the following steps: optimizing electric arc furnace smelting, and reducing the oxygen content of molten steel by adopting a specific deoxidation system; a double-slag method is adopted in the LF refining stage, the size of inclusions is reduced through Ca treatment and rare earth denaturation, and the plasticity of the inclusions is improved; the vacuum degree and the degassing time are controlled in the RH degassing process, and the gas content in the molten steel is further reduced; and finally, an optimized protective casting process is adopted in the continuous casting process, a flow field is optimized in combination with electromagnetic stirring (EMS), and formation of secondary inclusions is reduced. By means of the method, the total amount of inclusions of the wear-resistant steel casting blank can be reduced by 30%-50%, the oxygen content is reduced to 0.0010% or below, the cleanliness of the casting blank is remarkably improved, and the comprehensive performance of the wear-resistant steel is improved. The method is stable in process and suitable for industrial production.

The invention provides valve steel casting strength detection equipment, and relates to the technical field of valve strength detection.The valve steel casting strength detection equipment comprises a transverse sliding rod, a U-shaped vertical supporting frame is welded to the top end of the transverse sliding rod, and a transverse force distribution plate is fixedly arranged below the transverse sliding rod; two L-shaped mounting plates are symmetrically and fixedly connected to the top ends of the square driving block and the vertical force transmission plate, U-shaped mounting frames are fixedly connected to the L-shaped mounting plates, and I-shaped driving parts are slidably mounted on the two U-shaped mounting frames; and two longitudinal limiting shafts are symmetrically and fixedly connected to the bottom end part of the transverse sliding rod, transverse sliding plates are slidably installed on the two longitudinal limiting shafts in a spring pushing mode, positioning insertion shafts are fixedly connected to the inner sides of the transverse sliding plates, and the I-shaped driving part is in penetrating sliding fit with the U-shaped transmission frame. According to the device, the switching and adjusting operation of the use states of the vertical supporting and jacking plate and the jacking swing plate can be driven and executed through one-time sliding of the vertical force transmission plate, the operation steps are simplified, and the operation and use efficiency of the detection equipment can be indirectly improved.

The invention discloses a steel casting grinding method and device based on 3D virtual-real combination man-machine cooperation. Firstly, casting three-dimensional point cloud is obtained, a polishing path is generated based on the casting three-dimensional point cloud, and then simulated polishing is conducted based on the polishing path. And the worker judges whether the polishing path is reasonable or not based on the casting three-dimensional point cloud and the target three-dimensional model, if not, the polishing path is corrected, and simulated polishing is repeated till the polishing path is reasonable. According to the method, the grinding path can be generated according to the three-dimensional point cloud of the steel casting, the grinding path can better fit the situation of the steel casting, and the machining requirements of castings of various models and sizes and different machining precision requirements can be met. And meanwhile, polishing simulation is further carried out, the reasonability of the polishing path is judged according to the effect of the target three-dimensional model, and the situation that the polishing robot carries out polishing based on the unreasonable polishing path is avoided. And compared with a fixed path grinding mode, the precision and the generation efficiency of steel casting grinding can be greatly improved.

The invention discloses a preparation method of medium and low carbon chromium manganese martensite cast steel. The preparation method comprises the following steps: step 1, preparing raw materials; 2, high-temperature smelting; step 3, deoxidizing and desulfurizing; step 4, casting molding; step 5, annealing treatment; step 6, quenching treatment; step 7, tempering treatment; step 8, surface treatment; according to the invention, the medium-low carbon martensitic cast steel is designed, and the hardness and toughness of the martensitic cast steel are balanced by controlling the content of carbon in the cast steel, so that the problem of lower toughness of the martensitic cast steel under high carbon is avoided; meanwhile, the phenomenon that carbon elements are combined with chromium elements to be dispersed and separated out from grain boundaries or martensite laths in a carbide mode is reduced in cooperation with a heat treatment process, the corrosion resistance of the martensite cast steel is improved, meanwhile, the heat treatment process more suitable for medium and low carbon chromium manganese martensite cast steel is matched, various properties are further balanced, internal stress is eliminated, and the corrosion resistance of the martensite cast steel is improved. And the martensite structure is more uniform and stable.

The invention belongs to the technical field of metallurgy, and discloses an economical large-thickness steel plate and a manufacturing method thereof. The steel plate is formed by smelting the following components in percentage by mass: 0.10%-0.16% of C, 0.15%-0.45% of Si, 1.30%-1.60% of Mn, less than or equal to 0.012% of P, less than or equal to 0.001% of S and the like, and the balance of Fe and inevitable impurities. The manufacturing method comprises the steps of primary smelting, refining, continuous steel casting, heating and controlled rolling. According to the method, the high-compactness continuous casting slab refining and continuous casting technology is combined with the controlled rolling technology with microalloy carbonitride point enrichment nucleation as the core, a grain refined mixed structure is obtained, the problems that the compression ratio is low and grains are coarse when a large-thickness steel plate is produced through a continuous casting slab are solved, the thickness of the produced steel plate reaches 100-150 mm, and the yield of the steel plate is improved. The internal quality, strength and low-temperature toughness are excellent, and the continuous casting billet is produced by controlling rolling, so that the economical efficiency is good.

The invention relates to the technical field of large steel casting manufacturing, and discloses a crusher rack set for mining machinery and a casting method of the crusher rack set. The rack set comprises a cast steel body and a functional gradient reaction framework which is arranged in the cast steel body in advance and forms metallurgical bonding. The framework is made of refractory metal alloy, and an A area and a B area are divided on the framework. The area A is arranged at the heat accumulation core of the casting and is provided with a strong reaction coating on the surface; the area B extends outwards from the area A, and the surface of the area B is provided with a high-thermal-conductivity ceramic coating. The method comprises the steps of preparing the framework, installing the framework in a casting mold cavity, and then carrying out molten steel pouring and heat treatment. In-situ forced nucleation is initiated at the core of the casting through the strong reaction coating of the area A, a heat conduction path from inside to outside is established by means of the high heat conduction coating of the area B, and sequential solidification of the casting is achieved, so that defects such as shrinkage porosity and shrinkage cavities are effectively transferred, the density and uniformity of the internal structure of the casting are improved, and the casting quality is improved. And the overall mechanical property of the rack set is improved.

The present invention belongs to the field of metallurgical equipment technology, specifically relating to a continuous casting ladle drainage sand discharge device and its use method. The present invention utilizes an annular left-connected sand trough and an annular right-connected sand trough, forming a full-ring inner bore, as a channel for the molten steel to fall. A drainage cone is positioned at the upper end of the channel. As the drainage sand falls, the cone acts to cause it to fall into the interiors of the first and second sand holding chambers below, enabling recovery. When the molten steel contacts the drainage cone, the high temperature causes the cone to melt and flow along with the molten steel from the channel into the tundish below, preventing the molten steel from contacting the annular left and right sand troughs. After the drainage sand is recovered, a separation mechanism separates the annular left and right sand troughs to either side of the molten steel flow. This effectively prevents splashing caused by contact between the annular left and right sand troughs during movement, thereby extending the service life of the discharge device.

The invention relates to the field of steel casting grinding, and discloses a steam turbine heat-resistant steel casting grinding device and a process thereof.The device comprises an electric grinding machine, the electric grinding machine is arranged on the head of an automatic telescopic arm, the tail of the automatic telescopic arm is rotationally connected with a fixed disc, and a rotary disc is in transmission connection with a servo motor; the servo motor and the fixing disc are fixedly arranged on the supporting frame, the supporting frame is installed on an installation plate of the electric sliding rail, the electric sliding rail penetrates through an inner cavity of a valve shell to be polished, and the two ends of the electric sliding rail are fixed to the machining table through supports. An inner supporting structure is arranged on the supporting frame and provides radial supporting. A camera is further fixedly arranged on the cylinder body of the automatic telescopic arm through a supporting rod, and a cleaning keeping mechanism is arranged on the camera. According to the technical scheme, the inner cavity of the valve shell is effectively polished, the polishing condition is monitored in real time through the camera, and the camera is always in a clean state through the arranged cleaning keeping mechanism.

The application provides a structure Cu-containing Mo-V micro-alloy cast steel and a preparation method thereof. The cast steel material is composed of the following components in percentage of mass fraction: C: 0.06-0.13%, Mn: 1.3-1.9%, Si: 0.2-0.4%, Ni: 0.5-1%, Mo: 0.18-0.42%, V: 0.05-0.09%, and Cu: 0.25-0.65%. The method comprises the following steps: step one, adding a blank into an electric arc furnace or an induction furnace; step two, performing conventional smelting on the blank to obtain a molten steel with a required mass target component; step three, adjusting the temperature of a semi-finished cast steel and tapping the molten steel to obtain the cast steel; step four, performing heat treatment on the cast steel; and step five, judging the qualification of the cast steel to obtain a high-quality finished cast steel. Through the structure Cu-containing Mo-V micro-alloy cast steel and the preparation method thereof, the yield strength grade of the non-quenching + tempering type micro-alloyed precipitation strengthening type cast steel can be further improved, the low-temperature toughness of a large-size structure cast piece under a conventional process can be improved, and the cost consumption of the large-size structure cast piece under the conventional process can be reduced.

The present invention discloses a method, device, and storage medium for intelligently generating a three-dimensional cast steel node entity model. The method for intelligently generating a three-dimensional cast steel node entity model comprises the following steps: (1) generating a topologically optimized structure of a three-dimensional cast steel node; (2) using the topologically optimized structure of the three-dimensional cast steel node to create a training set for intelligently generating a three-dimensional cast steel node model; (3) importing the training set obtained in step (2) into a three-dimensional generative adversarial network to generate a three-dimensional cast steel node model and performing visualization processing on the model; (4) performing entity and splicing processing on the visualized three-dimensional cast steel node model. This method can solve the problems of insufficient video memory of the computer during editing operations in the process of generating a three-dimensional cast steel node entity model using a computer, insufficient surface smoothness of the generated three-dimensional cast steel node entity model, and lack of complete properties of the entity model.

The invention discloses a steel casting heat treatment process which comprises the following steps: step 1, heating a steel casting to a complete austenitizing temperature (30-50 DEG C above Ac3), and preserving heat; secondly, the austenitized steel casting is discharged out of the furnace, an aqueous solution quenching mode is adopted, the steel casting is rapidly cooled, and the steel casting is rapidly cooled through an aqueous solution, taken out and left to stand till the steel casting is cooled to the room temperature; and thirdly, the cooled steel casting is subjected to high-temperature tempering at the temperature of 500-650 DEG C, and heat preservation is conducted. The steel casting is subjected to heat treatment by adopting annealing, quenching and tempering processes, and barium hydroxide is added in the aqueous solution in the quenching process step, so that the cooling capacity of the aqueous solution can be improved, and the problem of corrosion of the steel casting does not need to be worried about.

The invention discloses low-gas-evolution and high-heat-resistance precoated sand and a preparation method thereof, and relates to the technical field of casting materials.The preparation method comprises the following steps that cast steel reclaimed sand is dried, so that the water content of the cast steel reclaimed sand is reduced to 0.1% or below; taking 1000 parts by weight of treated cast steel reclaimed sand, adding 5-10 parts by weight of a silane coupling agent, and uniformly mixing; the mixed materials are heated to 75-80 DEG C and then transferred into a sand mixer, 30-40 parts by weight of organic polysilazane resin is added, and sand mixing is conducted; adding 6-8 parts by weight of carbon nanotube powder, and mixing for 30 seconds; sequentially adding 5-7 parts by weight of vinyl silicone oil and 1.8-2.4 parts by weight of calcium stearate, and uniformly mixing to obtain a precoated sand product. According to the present invention, the novel bonding system is adopted to prepare the sand mold through the low temperature film coating process, and the prepared sand mold can generate ceramic transformation during the casting stage so as to provide characteristics of extremely low gas forming amount, extremely high heat resistance, low thermal expansion rate and excellent casting quality, and the production process has characteristics of energy saving and consumption reducing.

The application discloses a micro-smoke and odor-free cast steel environment-friendly regenerated coated sand process, which replaces a lubricant with hydroxyethyl ethylene bis-stearamide and corresponding auxiliary triisopropyl phosphate, significantly enhances the hot tensile strength and environmental protection of the coated sand, removes the solidified resin on the surface of the coated sand through a frozen shell breaking mode, greatly improves the shell breaking rate of the coated sand waste sand through modified aluminum nitride and preparation of a shell breaking auxiliary, and prepares a friction auxiliary to enhance the particle shaping of the coated sand regenerated sand, and further enhances the flowability of the coated sand prepared from the regenerated sand.

The invention relates to the technical field of stainless steel casting preparation, in particular to an anti-aging stainless steel material and a casting process thereof. Wherein the chemical components comprise, by weight, 0.01%-0.03% of C, 18%-22% of Cr, 8%-11% of Ni, 0.1%-0.8% of Mo, 0.5%-1.5% of Mn, 0.2%-1.0% of Si, 1.0%-3.6% of Cu, 0.2%-0.5% of Nb, 0.15%-0.25% of N and the balance Fe. The lime, the fluorite, the aluminum powder and the sodium silicate solution are precisely proportioned, a series of synergistic effects are achieved through a rigorous technological process, the physical and chemical properties of the smelting slag are optimized, and the high-alkalinity and high-fluidity smelting slag generated through the synergistic effect of the lime and the fluorite has the advantages that the smelting efficiency is improved; ideal thermodynamic and dynamic conditions are provided for desulfurization and dephosphorization reactions, harmful elements such as sulfur and phosphorus can be rapidly combined with CaO, stable compounds are generated and enter a slag phase to be removed, and the toughness and corrosion resistance of stainless steel are improved.

The invention discloses a method for controlling longitudinal cracks of a bearing steel casting blank with a 150-square section, and belongs to the technical field of continuous casting of ferrous metallurgy. Five core processes are used for collaborative optimization: 1) the degree of superheat of molten steel is controlled to be 25-45 DEG C, and manual and continuous temperature measurement is adopted to ensure temperature accuracy; (2) full-process protective casting is carried out, the insertion depth of a submersed nozzle ranges from 110 mm to 125 mm, and the centering deviation is smaller than or equal to 1 mm; (3) crystallizer electromagnetic stirring (M-EMS) takes the magnetic induction intensity larger than or equal to 1000 Gs as the standard, the current is set to be 380-450 A, the frequency is set to be 5-7 Hz, and the forward and reverse rotation period is set; 4, vibration parameters are set according to the pulling speed, and the cooling water amount is synchronously controlled, 5, a composite flow field is formed through a water gap of four water outlet holes with the downward inclination angle of 45 degrees from the outer wall to the inner wall, and the longitudinal crack occurrence rate is reduced to 0.5%-1% from 8%-10%. The casting blank surface quality and component uniformity are both considered, and the method is suitable for large-scale industrial production of the high-carbon bearing steel.

This invention discloses a heat treatment device for processing cast steel parts, belonging to the field of cast steel casting technology. The proposed solution includes a heat treatment mechanism with a mold storage mechanism. The invention uses an electric hydraulic rod to push the outer cover downwards, causing the soft structural layers to align with the support platform, thus sealing the multi-layered outer frame. This allows for heat treatment via a heater and also provides insulation. Next, the outer cover drives a limiting frame upwards to the second outer frame position, moving the lower crossbar to the upper crossbar position. The limiting frame then continues upwards, disengaging from the lower crossbar, allowing the lower crossbar to move downwards under gravity. Finally, the limiting frame moves downwards again and engages with a spring and locking groove, smoothly separating the bottom outer frame and transferring it to the center of the support platform. This bottom-up approach facilitates sequential extraction from below, improving ease of removal.

The application relates to an auxiliary casting mold device for cast steel forming of a mine dump truck, which comprises a ventilation device composed of a ventilation pipe, a pressure regulating box and an air inlet box, and a fixed mold frame for cast steel forming; the upper port of the pressure regulating box is communicated with the lower port of the air inlet box; the ventilation pipe is provided with a ventilation triggering device at the end; an adjusting pipe is slidably connected in the air inlet box; the adjusting pipe is a pipe structure with a contraction in the middle and expansion at both ends; the application utilizes the pressure change caused by the contraction and expansion positions of the adjusting pipe by the cooling airflow to adjust the pressure in the pressure regulating cavity, and further adjusts the suction process of the ventilation pipe to the gas in the fixed mold frame; on one hand, the gas in the fixed mold frame is timely sucked into the pressure regulating cavity to avoid the residual gas in the fixed mold frame; on the other hand, after pouring is completed, the liquid cast steel material in the ventilation pipe is re-pressed into the fixed mold frame to reduce the loss of the cast steel material.

The utility model provides a surface treatment device for stainless steel casting machining. Belongs to the field of stainless steel casting processing. According to the technical key points, the polishing device comprises a polishing mechanism, the polishing mechanism comprises a base, vertical plates are symmetrically and fixedly connected to the top of the base, rotating shafts are rotatably connected to the interiors of the two vertical plates, polishing wheels are fixedly connected to the outer sides of the rotating shafts, and a motor is fixedly connected to one side of one vertical plate; the output end of the motor is fixedly connected with one end of the rotating shaft; the polishing agent adding mechanism comprises a material dipping roller arranged below the polishing wheel, the material dipping roller makes contact with the polishing wheel, a transmission shaft is fixed to the interior of the material dipping roller in a penetrating mode, and the transmission shaft is rotationally connected with the two vertical plates; the utility model aims at providing a surface treatment device for stainless steel casting machining. The method is used for improving the stainless steel casting surface polishing treatment efficiency.

The application discloses a method for online regulation and control of surface crack inhibition based on casting blank structure, which comprises the following steps: establishing a continuous cooling transformation database of steel; and establishing a casting blank structure regulation and control system from the horizontal section of continuous casting to the furnace mouth, and regulating and controlling the casting blank structure based on cooling process control. The application has the beneficial effects that: the surface layer structure of the casting blank is adjusted through cooling process control at the horizontal section of the continuous casting, on the one hand, the continuous cooling transformation database of the steel is established to provide accurate data for the structure regulation and control based on the temperature system; on the other hand, the starting temperature and the ending temperature are called in real time from the established continuous cooling transformation database of the steel according to the continuous casting steel grade, and the cooling speed in the regulation and control process is dynamically calculated according to the steel structure requirement and the real-time temperature of the casting blank, so that the regulation and control for different steel grades and target structures are more accurate; and the surface structure of the casting blank is regulated and controlled, and automatic control is completely adopted, so that the advantages of accuracy, high efficiency and convenience are achieved.

The present application relates to the technical field of stainless steel thin strip continuous casting, and provides a method for improving the solidification stability of thin strip continuous casting stainless steel, which comprises the following steps: obtaining an initial parameter set of the thin strip; obtaining an initial process parameter set; performing thin strip continuous casting in combination with the obtained process parameter set; measuring the molten pool liquid level, the casting and rolling force, the casting roll surface temperature and the casting strip surface temperature in real time during the thin strip continuous casting process; judging according to a judgment condition; if adjustment is needed, obtaining an adjusted process parameter set and returning; otherwise, proceeding to the next step; completing the thin strip continuous casting to obtain a thin strip product. In the present application, the molten pool liquid level, the casting and rolling force, the casting roll surface temperature and the casting strip surface temperature during the thin strip continuous casting process are measured in real time and judged according to corresponding judgment conditions, and through the establishment of real-time collaborative control of "liquid level-heat transfer-casting and rolling force-roll gap", the surface quality and the microstructure uniformity are improved while ensuring the continuous and stable production of stainless steel casting strip with a thickness of ≤2 mm.

The invention discloses a novel nano-coating cast steel brick and a preparation method thereof. The cast steel brick comprises a cylindrical refractory matrix, a double-layer nano coating and a modified metal reinforcing belt, wherein the double-layer nano coating comprises a nano aluminum oxide bottom layer and a functional layer containing a sol-gel pre-coated graphene-ceramic composite material. According to the preparation method, pulse vibration forming, a sol-gel pre-coating technology and a carbon thermal reduction protective atmosphere sintering technology are adopted, the graphene-ceramic composite material has an Al2O3-BN double-layer ceramic coating layer protection structure, and the structural stability of graphene at the high temperature is ensured. The technical problems of low refractoriness, poor corrosion resistance and short service life of a traditional cast steel brick are solved, the refractoriness is improved by about 6%, the corrosion resistance is improved by 78%, the thermal shock stability is improved by about 79%, the single use performance is improved by 250%, and the cast steel brick is suitable for molten steel flow control in a continuous steel casting process.

This invention discloses a high thermal conductivity duplex cast steel housing for a high-speed permanent magnet motor and its preparation method. The high thermal conductivity duplex cast steel housing for a high-speed permanent magnet motor comprises the following components by weight percentage: C 0.3-0.45%, Cr 5-10%, Si 0.4-0.7%, Mn 0.5-1.5%, Mo 1-2%, Ni 2-3%, W 0.8-1.8%, Ti 0.05-0.1%, with the balance being iron and unavoidable impurities. This invention optimizes the alloy composition and controls the content of each element, while simultaneously applying a thermally conductive coating to the surface of the housing. This results in a housing with both excellent heat dissipation capacity and high-temperature strength, solving the problems of excessive temperature rise and thermal deformation of the housing under high-speed motor operation.

1. The name of the design product: cast steel head of diagonal rod. 2. The use of the design product: cast steel head of diagonal rod has a pair of left and right parts for installing vertical diagonal rods in the scaffold. 3. The design points of the design product: the combination of shape and pattern. 4. The picture or photo that best shows the design points: design 1 perspective view. 5. Design 1 is designated as the basic design.

The ladle baking device comprises a base, a steel ladle placed on the base and a ladle baking device which is arranged on the base and can ascend and descend, and is characterized in that a placing groove is formed in the base, and the rear side of the placing groove is of a square structure; an opening is formed in the outer side of the containing groove, the width of the opening is gradually reduced from outside to inside till the width of the opening is consistent with the width of the square structure, two square blocks extending in the front-back direction are arranged on the left side and the right side of the bottom of the steel ladle, and inserting holes allowing forks of a forklift to be inserted are formed in the middles of the square blocks. And when the steel ladle is placed in the placing groove and the left side wall, the rear side wall and the right side wall of the steel ladle abut against the left side wall, the rear side wall and the right side wall of the placing groove correspondingly, the ladle baking device is located over the steel ladle. According to the ladle baking device, before baking, a steel ladle containing aluminum ingots is transported and placed in the containing groove through a forklift, when the steel ladle is placed in the containing groove, the steel ladle is guided and positioned through the containing groove, the position of the steel ladle is determined after the steel ladle is stably placed, and baking can be conducted only by descending the ladle baking device.

The utility model provides a vacuum induction furnace steel pouring tundish which comprises a bearing bottom box, the bearing bottom box comprises a bottom plate, two short edge surrounding plates and two long edge surrounding plates, and the bottom plate is provided with a molten steel inlet and a molten steel outlet; the two long-edge coamings and the two short-edge coamings are vertically fixed to the edge of the bottom plate and define a cuboid structure with an opening in the top with the bottom plate; hollow heat insulation cavities are formed in the two long-edge surrounding plates, trunnion assemblies are arranged on the two long-edge surrounding plates, each trunnion assembly comprises at least two trunnions arranged in the length direction of the cuboid structure, and blocking mechanisms are arranged at the second ends of the trunnions. The blocking mechanism is matched with the trunnion to form a limiting mechanism used for limiting the chain type lifting appliance in the direction perpendicular to the long side coaming; the cover plate is used for covering the top opening of the bearing bottom box, and the cover plate is matched with the top opening of the bearing bottom box in shape.