300 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 discloses a method for preventing a high-carbon tool steel hot rolled steel coil from being flattened, which comprises the following steps of: providing a continuous casting slab which comprises the following components in percentage by mass: 0.65 to 1.35 weight percent of C, 0 to 1.6 weight percent of Si, 0 to 1.2 weight percent of Mn, 0 to 1.2 weight percent of Cr, less than or equal to 0.030 weight percent of P, less than or equal to 0.030 weight percent of S and the balance of iron and inevitable impurities; the charging temperature of the continuous casting sheet billet is larger than or equal to 300 DEG C, the continuous casting sheet billet is fed into a heating furnace to be heated, the discharging temperature of the continuous casting sheet billet is 1150-1250 DEG C, and a first sheet billet is obtained; the first plate blank is subjected to rough rolling, the rough rolling and finish rolling temperature ranges from 1050 DEG C to 1150 DEG C, and an intermediate blank is obtained; the intermediate billet is subjected to finish rolling, the finish rolling temperature of finish rolling is 800-950 DEG C, and finish rolled steel is obtained; laminar cooling is conducted on the finish-rolled steel in a front-section centralized cooling mode, final fine adjustment water and front and rear side spraying of laminar cooling are closed, the temperature of the finish-rolled steel is reduced to the first target temperature to the phase transformation point, and cooled steel is obtained; and the cooled steel is coiled at the temperature of 590-690 DEG C, the coiling tension is increased by 10%-20% in the coiling process, and a hot rolled steel coil of the high-carbon tool steel is obtained.

The invention relates to the technical field of high-speed tool steel, in particular to cobalt-containing high-speed tool steel and a preparation method thereof.The preparation method comprises the following steps that raw materials including, by weight, 55-60 parts of Fe, 2-5 parts of Mo, 2-4 parts of W, 0.5-0.8 part of V, 0.2-0.5 part of Co, 0.1-0.2 part of C and 0.1-0.2 part of rare earth elements are weighed; according to the cobalt-containing high-speed tool steel, through precise control over the content of alloy elements such as C, Mo, W, V and Co, ideal technical indexes of metallographic structures and machining performance are achieved, so that it is guaranteed that after heat treatment, ideal wear resistance and hardness are achieved, the wear resistance, impact resistance and hardness of a product are improved in a balanced and coordinated mode, and the effects of corrosion resistance and cold and heat resistance stability of the product are remarkable.

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 provides high-speed steel and a preparation method thereof, the high-speed steel relates to the technical field of tool steel, and the high-speed steel comprises the following chemical components in percentage by mass: 1.00%-2.00% of carbon, 4.00%-8.00% of chromium, 3.00%-6.00% of molybdenum, 2.00%-5.00% of vanadium, 3.00%-6.50% of tungsten, 4.00%-10.00% of cobalt, 0.01%-0.30% of zirconium, 0.10%-0.40% of silicon and the balance of iron and impurities. According to the high-speed steel, the problems that in traditional cast-forged high-speed steel, core eutectic carbide segregation is serious, and eutectic carbide particles are coarse can be solved, and the problems that existing high-vanadium high-speed steel is coarse in MC carbide particles, poor in grindability and low in grinding machining efficiency can also be solved.

The invention belongs to the technical field of steel performance intelligent analysis, and particularly relates to a high-strength and high-toughness rock drilling tool steel performance intelligent analysis method based on machine learning. The method comprises the following steps: firstly, collecting chemical components, process, microstructure images and performance data of rock drilling tool steel; then, a process-component prediction model and a microstructure image prediction model are constructed, and relations between component-process and microstructure characteristics and performance are mined respectively; then, the proportion of each component of the microstructure is obtained by combining finite element simulation with a genetic algorithm; predicting performance by using an XGBoost algorithm, comparing real indexes, and constructing an error feedback mechanism optimization model; and finally, solving an optimal parameter combination meeting a strength-toughness index by means of a particle swarm optimization algorithm. According to the method, multi-source data and multiple intelligent algorithms are fused, the defects of a traditional analysis method are effectively overcome, collaborative optimization of chemical components, the heat treatment process and the microstructure form is achieved, and the analysis precision and the production efficiency are improved.

The invention relates to a precision detection device for gear processing, which is suitable for detecting the dynamic performance and single tooth precision of a gear, and comprises a base, a rotating bracket, a fixed block, a motor, a reduction gearbox, a test gear, a to-be-tested gear, a main measuring rod, a plurality of measuring rods and the like. High-precision detection of gear dynamic balance, vibration parameters and the tooth outer end and the contour line of a single gear is achieved, the reduction gearbox reduces the rotating speed of the gear and strengthens torque control, and the gear thickness difference design is matched, so that the multiple measuring rods can slide along the tooth outer end of the gear, tooth surface deformation and the contact state are accurately detected, and the device is made of high-carbon low-alloy tool steel. The gear detection device has high strength and wear resistance, adapts to various gear specifications, can output detection data and analysis results in real time, is simple to operate, high in detection precision and high in applicability, and can be widely applied to the fields of gear manufacturing, quality detection and maintenance.

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 discloses an extrusion mold manufacturing method based on D2 tool steel, and belongs to the technical field of extrusion mold manufacturing, and the extrusion mold manufacturing method comprises the following steps: preparing D2 mold steel powder; d2 die steel powder and nickel-based tungsten carbide alloy powder are mixed according to the ratio of 90: 10; forming a mold blank by using a laser metal printer; the mold blank is put into a hot isostatic pressing furnace, heat preservation is conducted for 1-2 h at the temperature of 950-1000 DEG C and the pressure of 100-110 MPa, and cooling is conducted; then carrying out polishing, cleaning and drying treatment; and preparing an alloy coating on the surface of the mold blank through a laser cladding technology to obtain the mold. In this way, the hardness of the prepared mold is larger than 70, the corrosion rate at 250 DEG C is smaller than 5 cm < 2 >. H <-1 >, the grain size is larger than 10 grades, the wear rate at 400 DEG C is 5.04 * 10 <-5 > mm < 3 >. N <-1 >. M <-1 >, and the mold has good high-temperature corrosion resistance and high-temperature wear resistance.

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 the technical field of grinding machining, and discloses a roller for continuous machining and a mounting mechanism and a machining method of the roller for continuous machining. The roller body is a cylinder formed by tool steel; a connecting hole used for being connected with a knife handle is formed in the center of the roller body. The roller body is not provided with a chip pocket; a forming face formed by turning of a forming turning tool is arranged on the outer circumferential face of the roller body. High roller forming quality and forming efficiency can be achieved, machining is convenient, the machining cost is low, and economical efficiency is good.

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 discloses a novel method for detecting the thickness of a diamond and diamond-like carbon coating layer based on X-rays, which adopts X-ray nondestructive detection and adds an optimization algorithm, can solve the influence of residues on a detection result by an algorithm for single-ray mutual interference of the same element, and can improve the detection accuracy. The optimization algorithm and the method can be applied to the thickness of diamond grown in the surface physical modification direction of chip products, diamond-like carbon (DLC) coatings on the surfaces of hard alloys such as tool steel and structural materials, CVD (chemical vapor deposition) diamond coatings and the like. The method is also applicable to other element thicknesses of which the surfaces are not detected by the energy dispersion X-ray fluorescence spectrometer, such as nitrogen N layers and oxygen O layers, and also comprises cicada wing membranes or biological bionic membranes in the biological direction. In the aspect of chemical industry, the method is suitable for PE polyethylene and epoxy resin.

The invention relates to the technical field of drilling tool steel pipes, in particular to deep hole wire line coring drilling tool machining equipment which comprises a base and two vertical plates and further comprises two chucks rotationally arranged on the two vertical plates. The centering mechanism is horizontally and movably arranged above the base through a reciprocating mechanism; the two reversing mechanisms respectively drive the two chucks to intermittently rotate by a certain angle; the centering mechanism comprises a positioning block, a round hole is formed in the positioning block, and the round hole coincides with the axis of the two chucks. The two ends of the bent drilling tool steel pipe are fixed through the two chucks, the reciprocating mechanism drives the positioning block to continuously move in a reciprocating mode, and the multiple rolling wheels in the positioning block continuously roll the outer side of the drilling tool steel pipe back and forth, so that the bent drilling tool steel pipe can be rapidly straightened, the position where a bent section is located does not need to be sequentially found along the drilling tool steel pipe, and the working efficiency is improved. When a large batch of long drilling tool steel pipes are straightened, the machining time can be greatly shortened.

The invention discloses a using method of a bearing phosphating material frame. The bearing phosphating material frame comprises a conveying trolley, a hanging tool and a hook. The transport trolley comprises a trolley tray, four universal trundles installed on the bottom faces of the four corners of the trolley tray and two hanging tool inserting grooves fixed to the middles of the two side faces of the trolley tray. The hanging tool comprises a hanging tool steel frame and a hanging rack; the hanger steel frame comprises a bottom frame, two top frames, two pairs of positioning shafts and two pairs of lifting hook shafts; the hanging frame comprises a grid hanging plate, two inserting rods fixed to the two sides of the grid hanging plate and a connecting column fixed between the middle of the top face of the grid hanging plate and the bottom face of the middle of the bottom frame. The hanging tool is inserted into the two hanging tool slots of the transport trolley through the two insertion rods; the hook comprises an inner ring hook and an outer ring hook, and the inner ring hook and the outer ring hook are hung on the front face and the back face of the grid hanging plate through two hanging plate hook bodies respectively. The problem of butt joint with an automatic phosphating line and an AGV transport vehicle can be perfectly solved, the production efficiency of the phosphating procedure is improved, cost is reduced, and 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 relates to the technical field of steel and iron smelting, in particular to a smelting method of hot-working grinding tool steel, which comprises the following steps: 1) blowing molten iron through a top-bottom combined blown converter to control the quality parameters of the produced molten steel, and tapping; 2) hoisting the molten steel produced in the step 1) to a refining process, and refining in an LF refining furnace and an RH refining furnace in sequence; (3) the molten steel obtained after LF refining in the step (2) is hoisted to a continuous casting procedure for whole-course protective casting; wherein in the step (3), a weak cooling process is adopted in the continuous casting process. According to the smelting method of the hot-working grinding tool steel, the hot-working grinding tool steel with high cleanliness and high internal quality can be stably and efficiently smelted and obtained, and the problems that hot-working die steel is high in hot crack sensitivity, strict in requirement for indexes such as purity and internal quality, high in alloying difficulty and prone to cracking of a casting blank are solved.

The invention discloses a control technology for carbon segregation of a high-carbon tool steel continuous casting billet. The control technology comprises the steps of molten iron pretreatment, LF refining and continuous casting. The superheat degree of continuous casting and tundish molten steel is controlled to be 46-55 DEG C, a weak cooling mode is adopted in secondary cooling, the specific water flow is 0.15-0.20 L / kg, the throwing speed is controlled to be 0.70-0.80 m / min, a solidification tail end soft reduction process is adopted, and reduction is started when the solid fraction fs is 0.4-0.5; in the molten iron pretreatment, molten iron is subjected to desulfurization pretreatment, and the S content of the molten iron entering a furnace is controlled to be smaller than or equal to 0.005%; according to the LF refining, a high-alkalinity slag system is adopted, the final slag alkalinity (CaO / SiO2) is 7-10, the content of Al2O3 is controlled to be 20-25%, and the content of S in a finished product is controlled to be smaller than or equal to 0.002%. By means of the process, the center carbon segregation index of the high-carbon tool steel casting blank can be controlled to be smaller than or equal to 1.10.

An object is to provide a wood-cutting edged tool that is easily reground and that is used for cutting a woody material. The wood-cutting edged tool includes: a cutting part provided with a cutting edge having a surface; and a hardening layer with a base material being modified through nitriding or carburizing, the hardening layer being formed on the surface. The hardening layer has a surface hardness of higher than 40 HRC. The wood-cutting edged tool is formed from a tool steel. The hardening layer formed on the surface through nitriding or carburizing is integrated with the base material. Thus, unlike a coating layer, the hardening layer has a low risk that independently-occurring damage that involves peeling or the like occurs owing to regrinding.

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.

A cooling insert for a die, such as a distributor for a high pressure die casting assembly, and a method of manufacturing the cooling insert, is provided. The cooling insert can be formed of H13 tool steel and is manufactured using an investment casting process, for example, a process which uses a printed investment casting shell. The cooling insert includes complex cooling channels to improve cooling and reduce the duration of the casting process.

The present invention provides an alloy tool steel and a pilot smelting process thereof, and relates to the field of metal smelting; the process is a same-furnace smelting process for multiple alloy samples with different compositions, and by calculating the remaining amount of molten steel in the crucible after the first alloy sample is cast with the molten steel of the initial target composition of the vacuum induction furnace, and the remaining amount of molten steel in the crucible after any subsequent sample casting, the target component whose content is increased or decreased in the next alloy sample is added with the target component, and the industrial pure iron is added for dilution to accurately control the composition of each alloy sample after the first casting. The present invention can produce no less than 5 alloy samples with different compositions in one furnace, and can not only control the size of each casting sample, but also accurately control the composition of each alloy sample by calculating the remaining molten steel, and does not limit the content change trend of each component in the molten steel before and after each casting, thereby improving the research and development efficiency.

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.