188 results about "Tool steel" patented technology

The invention relates to a 1200MPa-grade high-strength tool steel wire rod and a manufacturing method thereof, after V-containing chemical components are designed, rolled and spun into a wire rod, the wire rod is subjected to online molten salt isothermal quenching treatment, and the wire rod is controlled to enter a bainite phase region from a high-temperature austenite state at a cooling speed greater than or equal to 32 DEG C / s; the steel wire rod with a microscopic structure comprising tempered bainite and ferrite is prepared through isothermal tempering, toughening and destressing treatment, carbide precipitation control and roller way cover opening and slow cooling, so that generation of deteriorated structures such as martensite can be avoided, the structure state can be effectively adjusted, strong plasticity matching of the steel wire rod is achieved, and the service life of the steel wire rod is prolonged. And the tensile strength is 1120-110MPa, the percentage reduction of area is 63-67%, and the steel is suitable for the application fields of manufacturing 1200MPa-grade high-strength tool steel and the like, and is favorable for being directly processed into tool parts after being subjected to cold processing molding.

The invention relates to a 1100MPa-grade high-strength tool steel wire rod and a manufacturing method thereof, the wire rod adopts a middle-carbon Nb-V-containing chemical component design, after a steel billet is rolled and spun into the wire rod according to the spinning temperature of more than or equal to 860 DEG C, online molten salt semi-quenching isothermal treatment is performed, the wire rod is controlled to be subjected to front-section molten salt treatment, and then the steel wire rod is subjected to hot rolling and hot rolling to obtain the 1100MPa-grade high-strength tool steel wire rod. According to the method, the steel wire rod enters a bainite phase region from a high-temperature austenite state at the cooling speed of more than or equal to 30 DEG C / s to form a structure taking quenched bainite as a main component, and then is subjected to rear-section molten salt heating isothermal tempering and toughening destressing treatment, and finally is subjected to roller way slow cooling to prepare the steel wire rod with a microscopic structure comprising tempered bainite and ferrite, so that the material cost can be reduced, and the production efficiency is improved. The method has the advantages that martensite brittle structures are effectively avoided, the structure state of the hot-rolled wire rod is controlled, the plasticity and cold working performance of the wire rod are improved, the tensile strength of the product can reach 980-1030 MPa, the percentage reduction of area is 61%-66%, and the product can be directly machined into tool parts after cold forming.

The invention relates to a 1300 MPa-grade high-strength tool steel wire rod and a manufacturing method thereof, after a Cr-Nb-V medium carbon component design is adopted for rolling and spinning to form a wire rod, the wire rod is subjected to online molten salt micro-quenching tempering treatment, the wire rod is controlled to enter a lower bainite phase region from a high-temperature austenite state at a cooling speed greater than or equal to 31 DEG C / s, and a quenching structure mainly comprising quenching bainite is formed; the steel wire rod with a microscopic structure comprising tempered bainite and ferrite is prepared by carrying out isothermal tempering and toughening destressing treatment on a quenched structure and finally carrying out roller way slow cooling, so that the material cost can be properly controlled, the strength and plasticity matching of the steel wire rod is improved, the tensile strength is 1255-1305MPa, and the percentage reduction of area is 58-63%, so that the steel wire rod can be directly processed into a part after being subjected to cold processing molding, and the service life of the steel wire rod is prolonged. And tool steel production energy consumption, cost reduction and efficiency improvement are facilitated.

The invention discloses a method for detecting tissue evolution in a heating process after quenching of tool steel based on saturation magnetization, resistivity and hardness, and relates to the technical field of metal material detection.The method comprises the steps that heating parameters are set for different types of tool steel, and an actual tempering process is simulated; then, the saturation magnetization intensity, the resistivity and the hardness are measured through professional equipment, and data are obtained through accurate measurement and scientific calculation; and then, sorting the data to establish a database, analyzing by using a multiple linear regression model, and judging an organization evolution stage according to a preset result range. According to the method, the structure evolution of the tool steel can be accurately and comprehensively monitored, the detection accuracy and scientificity are improved, powerful support is provided for quality control and process optimization in the tool steel production process, and the tool steel product performance and production efficiency are effectively improved.

The invention discloses a processing technology of a high-hardness wear-resistant steel guide rail, relates to the technical field of alloy tool steel heat treatment, and aims to solve the problems of insufficient wear resistance, large heat treatment deformation, high cracking risk and non-uniform cooling in the production process of the high-hardness wear-resistant steel guide rail in the prior art. The invention provides a high-hardness wear-resistant steel guide rail prepared from 9Mn2CrWV steel, and a processing technology comprising preheating, austenitizing treatment, oil cooling (including heat straightening), primary tempering, deep cooling, secondary tempering and post-treatment. According to the process, by strictly controlling the temperature, the time and the medium of each stage, the hardness, the wear resistance and the structure uniformity of the guide rail are effectively improved, meanwhile, the risks of deformation and cracking are remarkably reduced, and green and environment-friendly production is achieved.

The invention belongs to the technical field of rolling, and particularly relates to an anti-decarburization and anti-brittle failure controlled cooling process for a high-silicon-chromium alloy tool steel wire rod. Aiming at the dilemma that the hot-rolled wire rod which contains more than 2.0% of Si, more than 1.1% of Cr, Mo, V and other alloy elements not only meets the decarburization requirement of a product, but also does not have brittle failure of the wire rod, the method comprises the following steps: firstly, determining the cover entering temperature of the hot-rolled wire rod, the cooling speed of the wire rod before the hot-rolled wire rod enters the cover and other key process parameters; and then the method is realized by adjusting the speed of a roller way, the number of opened heat preservation covers after spinning, a fan Jinling device, the air volume of a fan, the spinning temperature and the like, so that the hot rolling structure of the wire rod is a pearlite structure which is not easy to brittle, and meanwhile, the requirement that the decarburization of a product does not exceed 0.55 D (D is the diameter of the wire rod) is met.

The invention relates to a 1150MPa-grade high-strength carbon tool steel wire rod and a manufacturing method thereof.The 1150MPa-grade high-strength carbon tool steel wire rod comprises, by mass, 0.57%-0.62% of C, 0.38%-0.47% of Si, 0.53%-0.63% of Mn, smaller than or equal to 0.015% of P, smaller than or equal to 0.015% of S and the balance Fe and inevitable impurities, after the wire rod is rolled and spun, online molten salt isothermal toughening treatment is conducted on the wire rod, the wire rod is controlled to enter a sorbite phase region from a high-temperature austenite state, and the steel wire rod is subjected to high-temperature annealing treatment; the method comprises the following steps of: preparing a steel wire rod of which the microscopic structure comprises tempered sorbite, ferrite and fused sorbite, forming a structure mainly comprising fine lamellar spacing sorbite, carrying out isothermal tempering, and finally slowly cooling through a roller way, so that the steel wire rod of which the microscopic structure comprises tempered sorbite, ferrite and fused sorbite can reach the tensile strength of 1050-1100MPa and the percentage reduction of area of 45-50%, and can be applied to the application fields of manufacturing carbon tool steel and the like. And therefore, a tool part can be directly processed after cold forming.

The invention relates to a 1250MPa-grade high-strength tool steel wire rod and a manufacturing method thereof.The manufacturing method includes the steps that after medium-carbon alloy components containing trace Nb and V are designed, rolled and spun into a wire rod, online molten salt quenching strong isothermal treatment is conducted, the wire rod is made to pass through front-section molten salt firstly, the wire rod is controlled to enter a bainite phase region from a high-temperature austenite state at the cooling speed larger than or equal to 35 DEG C / s, and then the high-strength tool steel wire rod is manufactured; the preparation method comprises the following steps: firstly, quenching bainite is taken as a main raw material to form a quenching structure taking the quenched bainite as a main raw material, then, the steel wire rod with a microscopic structure comprising tempered bainite and ferrite is prepared through rear-section molten salt heating, isothermal tempering and toughening destressing treatment on the quenching structure, carbide precipitation control and roller way slow cooling finally, and the strength and plasticity matching of the steel wire rod can be improved by adjusting the structure state, so that the strength and plasticity of the steel wire rod are improved. The tensile strength is 1175-1225 MPa, the percentage reduction of area is 58%-63%, and the steel can be directly machined into parts after cold machining forming, so that the production energy consumption of the tool steel is reduced, the cost is reduced, and the efficiency is improved.

The invention relates to a 1100MPa-grade high-strength carbon tool steel wire rod and a manufacturing method thereof, a carbon component design is adopted, the rolled and spun wire rod is subjected to online molten salt isothermal toughening treatment, and the wire rod is controlled to enter a sorbite phase region from a high-temperature austenite state at a cooling speed of more than or equal to 32 DEG C / s to form a structure mainly comprising fine lamellar spacing sorbite; the steel wire rod is controlled to be subjected to isothermal tempering, sorbite lamellar fusing promotion and toughening destressing treatment in an isothermal interval, and finally the steel wire rod with the microscopic structure comprising tempered sorbite, ferrite and fused sorbite is manufactured through roller way slow cooling, so that the material cost can be reduced, the overall strength and plasticity of the steel wire rod can be improved, the tensile strength is 1020-1070 MPa, the percentage reduction of area is 46%-51%, and the steel wire rod can be manufactured into the steel wire rod with the microstructure comprising tempered sorbite, ferrite and fused sorbite. Therefore, the tool part can be directly machined after cold machining, additional heat treatment after cold machining is omitted, the production cost and energy consumption of downstream users are reduced, and the production efficiency and the yield are improved.

The invention relates to a 1150MPa-grade high-strength tool steel wire rod and a manufacturing method thereof, the wire rod adopts a high-Cr medium-carbon component design, after a steel billet is rolled and spun into the wire rod, on-line molten salt low-temperature quenching isothermal treatment is performed, the wire rod is controlled to be subjected to front-section molten salt treatment firstly, the wire rod enters a lower bainite phase region from a high-temperature austenite state at a cooling speed of more than or equal to 35 DEG C / s, and the steel wire rod is subjected to high-temperature quenching isothermal treatment at a cooling speed of more than or equal to 35 DEG C / s; the method comprises the following steps: quenching bainite to form a structure taking the quenched bainite as a main part, then carrying out rear-section molten salt heating isothermal tempering and toughening destressing treatment, and finally carrying out roller bed cover opening slow cooling to prepare the wire rod with a microscopic structure comprising tempered bainite and ferrite, so that the initiation of an abnormal brittle structure can be inhibited, the structure state of the wire rod is effectively controlled, and the toughness performance matching of the wire rod is improved; the tensile strength is 1050-1100 MPa, and the percentage reduction of area is 59%-64%, so that the alloy can be directly processed into parts after cold forming.

The invention relates to a 1450MPa-grade high-strength tool steel wire rod and a manufacturing method thereof.The method includes the steps that after Nb-V chemical component design rolling and spinning are conducted to form a wire rod, online molten salt phase change regulation and control quenching isothermal treatment is conducted, the wire rod is controlled to be cooled from a high-temperature austenite state at the front-section molten salt at the cooling speed larger than or equal to 36 DEG C / s, part of austenite is promoted to be converted into a martensite structure, and then the temperature of molten salt is reduced from the high-temperature austenite state at the cooling speed larger than or equal to 36 DEG C / s; the method comprises the following steps: heating to a sorbite phase region through a rear-section molten salt, promoting the transformation of austenite residues to a sorbite structure, carrying out isothermal tempering toughening destressing treatment on the structure, and finally carrying out roller way slow cooling to prepare the wire rod with a microscopic structure comprising isothermal sorbite and tempered martensite, so that the strength and plasticity matching of the wire rod can be improved, the tensile strength is 1410-1460 MPa, and the tensile strength is 410-460 MPa. The percentage reduction of area is 37%-42%, additional heat treatment is avoided after cold machining forming, tool steel parts are directly machined, the production energy consumption and cost of the high-strength tool steel are reduced, and the production efficiency is improved.

The invention relates to a 1400 MPa-grade high-strength tool steel wire rod and a manufacturing method thereof.The method comprises the steps that after a Cr-V chemical component design is adopted for rolling and spinning to form a wire rod, online fused salt mixing quenching isothermal treatment is conducted, the wire rod is controlled to enter a sorbite phase region from a high-temperature austenite state at the cooling speed larger than or equal to 32 DEG C / s, part of austenite is promoted to be converted into a sorbite structure, and then the steel wire rod is rolled and spun; the method comprises the following steps: quenching austenite to form a quenching structure mainly comprising the retained austenite, carrying out isothermal tempering on the quenching structure to convert the retained austenite into martensite, toughening and destressing, and carrying out roller way slow cooling to prepare the steel wire rod with a microscopic structure comprising isothermal sorbite, tempered martensite and ferrite, so that the material cost can be properly controlled; the cold machining performance and the high-strength characteristic of the wire rod are considered, the tensile strength of a product is 1370-1420 MPa, and the percentage reduction of area is 35-40%, so that the heat treatment procedure after cold machining of the tool steel is omitted, the production energy consumption and cost of the tool steel are reduced, and the production efficiency is improved.

The invention relates to a 1500MPa-grade high-strength tool steel wire rod and a manufacturing method thereof.The method includes the steps that after Nb-V chemical component design is adopted for rolling and spinning to form a wire rod, online molten salt subcooling quenching isothermal treatment is conducted, molten salt of the wire rod at the front section is controlled to enter a martensite phase region from a high-temperature austenite state at the cooling speed larger than or equal to 37 DEG C / s, part of austenite is promoted to be converted into a martensite structure, and then the steel wire rod is rolled and spun; the method comprises the following steps of: heating to a sorbite phase region through a rear-section molten salt, promoting the transformation of austenite residues to a sorbite structure, carrying out isothermal tempering toughening destressing treatment on the structure, and finally slowly cooling through a roller way to prepare a wire rod of which the microscopic structure comprises tempered sorbite and tempered martensite, the material cost can be properly controlled, the phase change of the wire rod is powerfully regulated and controlled, the strength and plasticity matching of the wire rod is improved, the tensile strength is 1470-1520 MPa, and the percentage reduction of area is 52%-57%, so that additional heat treatment after cold machining is omitted, the production energy consumption and cost of the tool steel are reduced, and the efficiency is improved.

The invention discloses a manufacturing method for a meat grinder blade. The manufacturing method comprises the following steps that S01, 440C cutter steel powder is selected; s02, an injection mold corresponding to the meat grinder blade is selected, the injection mold comprises a front mold body and a rear mold body, and the front mold body and the rear mold body are heated; s03, the 440C cutter steel powder is fed into an injection molding machine to form a blank; step S04, trimming the blank piece; s05, the blank is placed on the ceramic plate, the ejector pin face of the blank faces upwards, and the sprue face of the blank faces downwards; s06, the blank obtained after workpiece placing is completed is transferred into a vacuum degreasing furnace to be degreased; s07, the blank is transferred into a vacuum sintering furnace to be sintered; s08, the sintered blank is transferred to a flat grinding machine to be subjected to flat grinding; s09, the blank piece obtained after plane grinding is checked, and the blank piece which is checked to be qualified is subjected to magnetic polishing; the concentricity of the shaft hole of the meat grinder blade and the blade body can be improved, and the coaxiality of the assembled meat grinder blade is correspondingly improved.

The invention relates to a tool steel wire rod and a production method for controlling segregation of a continuous casting billet. The tool steel wire rod comprises the following chemical components in percentage by mass: 1.10%-1.20% of C, 0.10%-0.35% of Si, 0.10%-0.30% of Mn, 0.0040%-0.015% of P, 0.0030%-0.014% of S, 0.00050%-0.0018% of As, 0.0005%-0.0020% of W, 0.00004%-0.0005% of Se and the balance of Fe and inevitable impurities. According to the method, system design is conducted on the ultrahigh-carbon tool steel wire rod with the carbon content being about 1.2% from the aspects of chemical components, the smelting process and the rolling process, continuous casting is adopted for replacing a traditional die casting production process, the carbon segregation index of a continuous casting blank does not exceed 1.07, and segregation of the continuous casting blank is effectively controlled.

The invention discloses a tool steel plasma cutting device and a using method, and relates to the technical field of cutting devices, the tool steel plasma cutting device comprises a base and a double-shaft driving assembly, a first assembling opening and a second assembling opening are formed in the side wall of the base, and the double-shaft driving assembly is connected into the first assembling opening and the second assembling opening. By installing the double-shaft driving assembly, the inner track and the outer track, stable annular cutting of tool steel through the double-shaft driving cutting head is achieved, multi-direction movement and multi-angle cutting of the cutting head are achieved, cutting flexibility and precision are improved, and the problems that when a traditional cutting device rotates in a single shaft mode, vibration is likely to be generated, consequently, the cutting face is rough, and cutting quality is poor are solved. And the complex machining requirements cannot be met.

The invention relates to a welding tool for a ceramic coating stirring head, which comprises a working rack and a bearing platform fixedly mounted on the upper end face of the working rack, a stirring head assembly is further mounted at the upper end of the working rack, and the bearing platform is positioned below the stirring head assembly and is used for bearing a to-be-welded workpiece; the stirring head assembly can move in the X-axis direction, the Y-axis direction and the Z-axis direction relative to the bearing platform. The stirring head assembly comprises a connecting disc, a shaft shoulder and a stirring needle, wherein the shaft shoulder and the stirring needle are installed at the lower end of the connecting disc. The shaft shoulder is connected to the lower end of the driving disc; and performing ceramic coating treatment on a shaft shoulder and a stirring needle of the tool steel stirring head. By utilizing the characteristics of wear resistance, corrosion resistance, adhesion prevention, high hardness, high temperature resistance and good biocompatibility of the ceramic coating, compared with a hard alloy stirring head, the stirring head body is low in processing difficulty, meets the welding of special materials, is better in toughness compared with the hard alloy, and is far lower than the whole hard alloy in cost.

The device for improving the carbon segregation of the high-carbon tool steel comprises a crystallizer, a submersed nozzle, a plurality of guide pipes, metal wires and a wire feeding mechanism, the guide pipes are vertically arranged above the crystallizer, and the guide pipes are located in the middle of the crystallizer in the width direction and arranged on the two sides of the submersed nozzle; the distance between the guide pipe adjacent to the immersion nozzle and the immersion nozzle is 200-350 mm, the distance between the guide pipe adjacent to the narrow edge of the crystallizer and the narrow edge of the crystallizer is 200-350 mm, and the metal wire is driven by the wire feeding mechanism to penetrate through the guide pipes to be vertically immersed in molten steel. According to the method, the metal wire is fed in the continuous casting process, the temperature deviation in the thickness direction of the continuous casting blank is reduced, meanwhile, the nucleating agent is introduced into the thickness center of the continuous casting blank, and therefore in the blank shell forming process of the casting blank, isometric crystals can be formed in the center, formation of developed columnar crystals is restrained, and composition segregation in the casting blank is reduced. The layering phenomenon of the product is avoided, the product quality is improved, and the production cost is reduced.

The present invention relates to a 1100MPa grade high-strength tool steel wire rod and a manufacturing method thereof. The wire rod is designed with a chemical composition of medium carbon and Nb-V. The steel billet is rolled and spun into wire rod at a spinning temperature of 860°C or higher. The wire rod is then subjected to an online molten salt semi-quenching isothermal treatment. The wire rod is controlled to first undergo a front-end molten salt treatment so that the wire rod enters a bainite phase region from a high-temperature austenite state at a cooling rate of 30°C / s or higher, forming a structure mainly composed of quenched bainite. The wire rod is then subjected to a rear-end molten salt heating isothermal tempering and toughening stress relief treatment. Finally, the wire rod is slowly cooled on a roller to form a wire rod with a microstructure including tempered bainite and ferrite. The method can reduce material cost, effectively avoid martensitic brittle structure, control the microstructure of the hot-rolled wire rod, improve the plasticity and cold working performance of the wire rod, and achieve a product tensile strength of 980-1030MPa and a cross-sectional reduction rate of 61%-66%, so that the product can be directly processed into tool parts after cold forming.

The application provides a tool steel and a preparation method thereof. The tool steel comprises the following chemical components in percentage by mass: C: 0.50-0.59%, Si: 0.80-0.95%, Mn: 0.35-0.55%, Cr: 8.00-9.00%, W: 0.80-1.20%, Mo: 3.00-3.40%, V: 0.30-0.50%, Nb: 0.15-0.30%, Co: 0.18-0.38%, Ni: 0.15-0.35%, and the balance of Fe and impurities. The tool steel has excellent high strength, high toughness and red hardness through the design of alloy components, the increase of the content of Mo, the addition of Co and Ni elements, the design principle of multiple element combination, and the comprehensive consideration of the precipitation and growth mechanism of different element carbides in the solidification process.

The invention is directed to a method for improving the wear resistance of a vanadium alloyed powder metallurgy produced cold work tool steel comprising 1-20 %V, 1 – 5 %Mo and ≤ 1 %W by HIPing the steel and subjecting the HIPed steel to a heat treatment at a temperature of at least 5 °C higher than the solidus temperature of the tool steel for a time of at least 30 minutes in order to increase the size of the VC-particles, wherein the cold work tool steel after hardening and tempering does not contain noticeable amounts of other carbides than VC.

The utility model discloses a tool steel quenching anti-deformation positioning device, which relates to the technical field of high-speed tool steel production and comprises a positioning mechanism and a waste water collecting tank mounted at the bottom of the positioning mechanism, a quenching spraying mechanism is arranged on the outer side of the positioning mechanism, and a water storage tank is arranged at the top of the quenching spraying mechanism. The positioning mechanism comprises a fixed sliding frame, a chain wheel limiting cover is fixedly installed on one side of the fixed sliding frame, a clamping motor is fixedly installed on one side of the interior of the chain wheel limiting cover, the output end of the clamping motor is fixedly connected with a chain wheel transmission assembly, and clamping bidirectional threaded rods are symmetrically installed on the outer side of the chain wheel transmission assembly; the high-speed tool steel is clamped and fixed through the clamping plate, the quenching stability of the high-speed tool steel is improved, meanwhile, the rotating motor is started to drive the clamping rotating base to rotate, the clamping plate can drive the high-speed tool steel to rotate, and the high-speed tool steel can be evenly heated and quenched in a rotating mode.

The present application relates to a kind of high plasticity carbon tool steel wire rod and its manufacturing method, the chemical composition of wire rod and mass percentage include: C:0.51%~0.56%, Si:0.15%~0.25%, Mn:0.45%~0.55%, P≤0.015%, S≤0.015%, the rest is Fe and inevitable impurities, wire rod after spinning is treated by on-line molten salt isostatic toughening, control from high temperature austenite state into sorbite phase region phase transition, isothermal tempering in isothermal interval, promote sorbite sheet layer fuse, toughening stress relief treatment, finally by roller slow cooling, be made into wire rod including microstructure of tempering sorbite, ferrite and fuse sorbite, can improve the plasticity of wire rod, reach tensile strength is 903~952MPa, reduction of area is 53%~58%, reduce material cost and the risk of wire breakage or cracking in tool cold working process, improve tool quality.

The present disclosure belongs to the field of steel materials, and relates to a steel wire rod for producing alloy tools with high fatigue life and high impact resistance and an application thereof. Chemical compositions of the steel include, by weight percentage: [C] 0.83%-0.92%, [Si] 2.30%-2.60%, [Mn] 0.40%-0.80%, [Cr] 0.70%-1.05%, [Ni] 1.31%-1.61%, [V] 0.14%-0.30%, [Al] 0.025%-0.060%, [P]≤0.025%, [S]≤0.020%, with the rest being Fe and unavoidable impurities. The alloy tool steel wire rod obtained in the present disclosure is suitable for producing screwdriver bits, screwdrivers, hex wrenches, etc., requiring high fatigue life and high impact resistance, and has the following properties: hardness within a range of 60-62 HRC, fatigue life of not less than 30,000 cycles, and impact resistance of not less than 60 seconds.

The invention provides a low-hardness tool steel wire rod and a production technology thereof. The low-hardness tool steel wire rod is composed of, by mass, 0.56%-0.60% of C, 0.60%-0.90% of Mn, 0.17%-0.37% of Si, 0.70%-0.90% of Cr, 0.09%-0.13% of V, smaller than or equal to 0.025% of P, smaller than or equal to 0.025% of S, smaller than or equal to 0.25% of Ni, smaller than or equal to 0.30% of Cu, smaller than or equal to 0.030% of Al and the balance Fe and inevitable impurities. Small square billets of 160mm * 160mm are adopted for rolling, components are optimized, a reasonable controlled rolling and controlled cooling process is adopted, the phenomenon that a wire rod generates an abnormal structure is avoided, and the structure of the wire rod is pearlite and ferrite; and meanwhile, the low hardness of the wire rod is guaranteed, the hardness of the wire rod is smaller than or equal to 25 HRC, deep processing of the wire rod is facilitated, the requirements of users for hot forging and drawing machining can be met, and wide application prospects are achieved.

The present application relates to a kind of tool steel wire rod and its production process, wire rod chemical composition is according to mass percentage C:1.12%~1.23%, Si:0.15%~0.32%, Mn:0.15%~0.40%, P:0.0050%~0.013%, S:0.0040%~0.015%, N:0.0025%~0.0040%, W:0.0005%~0.0018%, Sb:0.0004%~0.0021%, the balance is Fe and inevitable impurities.For the tool steel wire rod of carbon content 1.2% or so, from chemical composition, smelting process and rolling process each aspect carries out system design, using continuous casting instead of traditional mould casting production process, the low multiple porosity and shrinkage hole grade of continuous casting billet are all not greater than 1.0 level, and high-efficiency production of super-high-carbon tool steel wire rod is realized.

The invention relates to a quenching and tempering process for a hot working alloy tool steel pipe die, which comprises the following specific steps: putting a machined pipe die into a quenching furnace with the furnace temperature of less than or equal to 450 DEG C, heating to 600-700 DEG C at full power, preserving heat, heating to 100-130 DEG C above an upper critical temperature (AC3) at full power, preserving heat, slowly cooling to 80-110 DEG C above the upper critical temperature, preserving heat for 0.5-1 hour, and quickly cooling, cooling to the temperature below the martensite transformation ending temperature; then feeding into a tempering furnace with the furnace temperature less than or equal to 450 DEG C, raising the temperature to a performance tempering temperature at full power for heat preservation, and after heat preservation is finished, discharging and air-cooling to room temperature; after mechanical property detection and straightening, the pipe die enters a tempering furnace with the furnace temperature smaller than or equal to 450 DEG C, the temperature is increased to the temperature 30-40 DEG C lower than the performance tempering temperature at the speed of 60-100 DEG C / h for heat preservation, and after heat preservation is finished, the pipe die is cooled to the temperature lower than 150 DEG C at the speed of 10-30 DEG C / h and discharged out of the furnace for air cooling. The problems of high heat treatment production cost and long production period are well solved.

The utility model discloses a high-speed tool steel cast ingot demoulding auxiliary device, which relates to the technical field of cast ingot demoulding and comprises a demoulding mechanism and a demoulding sliding plate mounted at the bottom of the demoulding mechanism, a mould closing mechanism is arranged at the top of the demoulding mechanism, and a top mould mounting support is arranged in the mould closing mechanism. The demolding mechanism comprises a workbench, a heat dissipation frame is fixedly installed on the top of the workbench, fixing blocks are fixedly installed on the two sides of the heat dissipation frame, fixing bolts are symmetrically connected to the interiors of the two fixing blocks in a threaded mode, and a bottom mold body is fixedly installed on the top of the heat dissipation frame. An air hole ejection sliding plate is slidably connected into the bottom die body, a certain airflow is generated through a demolding air pump, the airflow passes through the air hole ejection sliding plate to demold a cast ingot, meanwhile, when a demolding sliding cover moves to the bottom of a heat dissipation frame, heat of the bottom die body can be discharged from air holes in the two sides of the heat dissipation frame, and the heat dissipation efficiency is improved. Therefore, the heat dissipation effect of the bottom die body is improved.

Methods are disclosed for heat treating a high-carbon steel component, including a high-carbon tool- steel component, printed by powder-based full-melt additive manufacturing, wherein the printed component contains at least 0.2 wt% C and comprises at least 30 vol% of an austenitic phase and wherein the composition of the component may be selected according to a modified Schaeffler diagram. The methods comprise applying a thermal treatment to decompose at least a fraction of the austenitic phase into at least a ferritic phase, austenitization, rapid cooling or quenching to a temperature below which austenite transforms to martensite, and tempering.

The utility model relates to the technical field of circular saw blade production, in particular to a blade-embedded type circular saw blade. The sawtooth sleeve is sleeved at the tip end of the cutter block, meanwhile, the stability of the sawtooth sleeve and the cutter block is improved through connection of the countersunk head screws, due to the fact that only the sawtooth sleeve part is made of high-speed steel materials, the sawing performance is guaranteed, and the other parts are made of common tool steel, consumption of the high-speed steel materials of an original whole embedded type circular saw blade can be saved. Meanwhile, the heat treatment process is simplified, and power consumption is saved; the blade block and the saw blade body are connected in a clamping and bolt connection combined mode, when a bolt is screwed into a threaded hole, the inserting blocks at the two ends are extruded to move towards the two sides, the clamping blocks are inserted into the clamping grooves, and therefore the stability of the whole structure is improved. When the sawtooth sleeve is abraded, the sawtooth sleeve can be replaced, and when the position of the cutter block or the blade is damaged, the blade can be replaced.