567 results about "Machinability" patented technology

The invention relates to the technical field of diamond hole drills, and discloses a diamond drilling tool with a chip removal function, the diamond drilling tool comprises a connecting cylinder, a drill bit is arranged at the bottom of the connecting cylinder, a chip removal mechanism is arranged, slurry is injected into a drill hole through a flow channel, the drill bit is cooled through the inrush slurry, and the chip removal function is achieved. The problems that due to the fact that a large amount of heat generated by friction between the drill bit and rock causes rapid temperature rise of the drill bit, thermal damage of diamond particles is caused, the cutting performance of the drill bit is reduced, and the service life of the drill bit is prolonged are solved, and meanwhile, due to the viscosity and fluidity of the slurry, rock debris can be suspended and brought out of holes along with continuous injection of the slurry; in this way, the hole bottom can be kept clean, a good condition is created for continuous drilling of the drill bit, a layer of lubricating mud film is formed between the drill bit and the hole wall, friction resistance between a drilling tool and the hole wall can be reduced, and energy consumption in the drilling process is reduced.

The invention provides low-temperature rolled high-quality free-cutting steel and a production process thereof. The low-temperature rolled high-quality free-cutting steel comprises the following components: less than or equal to 0.10% of C, less than or equal to 0.006% of Si, 0.90-1.60% of Mn, 0.30-0.90% of P, 0.30-0.50% of S, less than or equal to 0.030% of Al, less than or equal to 0.0060% of N, less than or equal to 0.0140% of O and the balance of Fe and other inevitable impurities. Compared with the prior art, by controlling Mn / S to be 3.5-7.0, when the K value is equal to 2 * (Mn / S) + LF activity oxygen value, and K is larger than or equal to 35 and smaller than or equal to 69, the final sulfide is properly controlled. Low-temperature rolling is adopted, the sulfide hot brittleness interval is avoided, the plasticity of sulfide is relatively poor during rolling in the temperature interval, energy consumption is reduced, and meanwhile the phenomenon that the cutting performance of a finished product becomes poor due to the fact that the sulfide is lengthened in the rolling process is avoided. Finally, the high-quality free-cutting steel production process adopting low-temperature rolling is developed.

The invention provides large-coil free-cutting steel and a production process thereof. The large-coil free-cutting steel comprises the following components: less than or equal to 0.09% of C, less than or equal to 0.005% of Si, 0.90-1.65% of Mn, 0.04-0.09% of P, 0.30-0.50% of S, less than or equal to 0.030% of Al, less than or equal to 0.0060% of N, less than or equal to 0.0140% of O and the balance of Fe and inevitable impurities. Compared with the prior art, the method has the advantages that the active oxygen range in the LF refining process is controlled, appropriate large coil production process parameters including soaking temperature, soaking time, rolling temperature and coiling temperature are matched, the coiling temperature range is controlled to be J + / -15 DEG C, and J is equal to (4 * Mn / S + LF active oxygen) + 800 DEG C. And the fusiform control of the final finished product sulfide coiled in the temperature interval is proper. And finally, the obtained steel wire rod is excellent in surface quality, the finished steel wire rod sulfide spindle ratio is high, the C-shaped chips account for more than 90%, and the cutting performance is excellent.

The quick tool changing device convenient for motor part machining comprises a main tool body, blade grooves are formed in the two ends of a rotating body, and turning blades are fixed in the blade grooves through locking screws; a cylinder at the bottom of the rotating body is in clearance fit with a tool pad and a hole in the main tool body, the main tool body is provided with a cylindrical ejector rod, and the cylinder at the bottom of the rotating body abuts against the cylindrical ejector rod and is locked through a bolt on the outer side of the main tool body. A key is arranged below the rotating body and is in contact positioning with a key groove in the plane of the cutter pad, and the main cutter body internally comprises an upper spraying pipe on the upper portion of the main cutter body and a lower spraying opening in the front end of the main cutter body. An inner cooling device in the main cutter body sprays cooling liquid to the cutting edge through an upper spraying pipe and a lower spraying opening, the problem of machining overheating is solved, the cutting performance is improved, cuttings can be washed away through high-pressure cooling water, and the problem of long cuttings is solved; and the rotating body with the positioning key can realize a quick tool changing function.

To provide a high-quality Cu-Zn-Si-Pb-P-based alloy continuous wire rod material having excellent strength, elongation and machinability, and less defect.SOLUTION: A wire rod material contains Cu of more than 60.0 mass% and less than 65.0 mass%, Si within the range of 0.40 mass% or more and 1.20 mass% or less, Pb within the range of 0.002 mass% or more and 0.250 mass% or less, and P within the range of 0.040 mass% or more and 0.190 mass% or less, and contains Bi of 0.001 mass% or more and 0.100 mass% or less as an arbitrary element, where the balance consists of Zn and impurities, the total content of Fe, Mn, Co and Cr being impurities is 0.450 mass% or less, the total content of Sn and Al is 0.30 mass% or less, and on a cross section orthogonal to casting direction, an area proportion of phase α and phase β is α:β=40 to 70:60 to 30, an area ratio of phase γ is 0.1% or less, and an area ratio of fine phase α having a particle diameter 10 μm or less is 30% or more and 60% or less.SELECTED DRAWING: None

The invention belongs to the technical field of 3-series aluminum alloys, and particularly relates to a 3xxx aluminum alloy and a preparation method and application thereof. By optimizing the content of Mn, Fe and other elements and combining the high-temperature homogenizing annealing process, the aluminum alloy material has high strength and machinability, meanwhile, the size of coarse intermetallic compounds is reduced through high-temperature rolling, distribution is more uniform, grains and textures are refined through the continuous intermediate annealing process, and the yield of the aluminum alloy material is improved. The alloy plasticity is improved, the anisotropy of the plate is reduced, and the battery shell yield is higher. Moreover, high-temperature homogenization and hot continuous rolling are integrated, so that the production time is shortened, and the production efficiency is improved. According to the method, a high-temperature short-time intermediate annealing process is adopted, the grain size in the 3xxx aluminum alloy plate strip is regulated and controlled to be 25-35 microns, the texture proportion of Cube is 2-3.5%, and the texture proportion of Goss is 3-5%, the alloy plasticity is improved, the anisotropy of the plate is reduced, and the surface quality of a battery shell can be effectively improved.

The present invention relates to the technical field of cutting fluids, and in particular to a water-based high-lubricity cutting fluid and a preparation method thereof, comprising triethanolamine, an oily corrosion inhibitor, a lubricating additive, benzotriazole, a surfactant, a potassium hydroxide solution, a pH regulator and deionized water. The water-based high-lubricity cutting fluid in the present invention is compounded by lubricating additives, triethanolamine, an oily corrosion inhibitor, benzotriazole, a surfactant and the like, wherein the sulfide fatty acid ester embedded in the lubricating additive is thrown out from the pores under the action of centrifugal force when subjected to a high centrifugal speed, and adheres to the metal surface to form a dense sulfide film, which plays a lubricating role, can effectively reduce shear stress, reduce friction and power consumption, reduce the temperature of the friction part between the tool and the workpiece and the tool wear, improve the cutting performance of the workpiece material, and improve the lubrication performance of the cutting fluid, so that it has the characteristics of small usage and high cutting quality.

The invention discloses 780MPa-grade hot-dip galvanized DH steel and a manufacturing method thereof, the alloy components of DH780 steel grade are optimized, the contents of Si and Mn elements are reduced, and the generation of external oxides is reduced, so that the risk of plating leakage defects is reduced; besides, by improving the dew point in the annealing process and increasing the oxygen partial pressure in the annealing atmosphere, internal oxidation of Si and Mn elements on the surface layer of the DH780 steel grade is promoted, so that the plating leakage defect is effectively reduced, and the surface quality of the steel plate is remarkably improved; according to the method, the production cost is reduced, the weldability and machinability of a product are improved, the integrity and uniformity of a plating layer are effectively improved, the corrosion resistance of the product is improved, the service life of the product is prolonged, and the application range of the DH780 steel grade hot-dip galvanized steel plate is widened.

The invention provides high-quality free-cutting steel and a production process thereof, the high-quality free-cutting steel comprises the following components: less than or equal to 0.09% of C, less than or equal to 0.006% of Si, 0.90-1.60% of Mn, 0.04-0.09% of P, 0.30-0.50% of S, less than or equal to 0.030% of Al, less than or equal to 0.0060% of N, less than or equal to 0.0140% of O and the balance of Fe and other inevitable impurities, and Mn / S = 3.6-5.0; y value = 5 * Mn / S + LF activity oxygen value) / 2, and when the Y value is greater than or equal to 24 and less than or equal to 57.5, the final sulfide is properly controlled. The steel is produced through the production path of converter smelting, LF furnace refining, continuous casting and rolling, the LF and continuous casting process technologies are controlled, the appropriate rolling technology is matched, and finally the obtained casting blank is good in quality, the center segregation is stably controlled to be smaller than or equal to 1.0 level, the sulfide spindle ratio is larger than or equal to 45%, and the finished wire rod is excellent in cutting performance.

The invention relates to the technical field of lathe numerical control, in particular to a lathe digital intelligent management method and system based on industrial visual analysis. The method comprises the following steps that multidirectional lathe workpiece monitoring is carried out based on a heterogeneous visual sensing array, and a theoretical lathe machining finished product is obtained; real-time lathe tool and workpiece interactive monitoring is carried out, and time sequence tool cutting state data are constructed; according to the time sequence cutter cutting state data, carrying out finished product comprehensive form deviation evaluation on the theoretical lathe machining finished product so as to obtain a machining form deviation evaluation result; and performing cutter cutting performance attenuation analysis according to the machining form deviation evaluation result to generate a dynamic machining parameter set of the lathe. The lathe management efficiency and the machining precision are improved through dynamic and real-time lathe machining parameter adjustment.

The invention relates to a high-quality non-quenched and tempered steel rectangular bloom for a crankshaft and a preparation method of the high-quality non-quenched and tempered steel rectangular bloom, and belongs to the technical field of non-quenched and tempered steel preparation. In order to improve the purity of molten steel for continuous casting and solve the problems of surface crack, composition segregation and uneven structure of the rectangular bloom of the steel for the non-quenched and tempered crankshaft, the invention provides a preparation method of the rectangular bloom of the steel for the high-quality non-quenched and tempered crankshaft, and the preparation method comprises the process steps of converter / electric furnace smelting, LF refining, VD / RH vacuum treatment and continuous casting. According to the method, the size and shape of the inclusions are controlled by taking strong deoxidation, uniform stirring, slag system refining and soft blowing time as the core, the fusiform MnS-shaped inclusions are obtained, and the cutting performance and the overall mechanical performance of the steel are remarkably improved. According to the method, continuous casting is carried out in a weak cooling and slow drawing mode, the surface of a casting blank is controlled to crack smoothly, the homogenization and the internal quality of the casting blank are improved, the quality of the non-quenched and tempered steel for the crankshaft is obviously improved, and a good base material is provided for rolling the crankshaft.

The invention provides a tool and coating combination recommendation system and method based on workpiece parameters, and relates to the technical field of tool and coating combinings.The method comprises the steps that a test module collects machining performance data under different parameter combinations and covering tool characteristics and cutting performance data of workpieces, a prediction model building module trains a performance prediction model, and the performance prediction model builds a performance prediction model; the simulation module randomly combines parameters to generate initial population individuals and inputs the initial population individuals into the model to obtain data, the data processing module processes the obtained data and generates a life evaluation coefficient, a quality evaluation coefficient and a comprehensive evaluation coefficient, and the iterative optimization module optimizes the initial population by means of a genetic algorithm with the purpose of minimizing the comprehensive evaluation coefficient. And a recommendation module selects an optimal combination and recommends the optimal combination to the user according to the optimal values. According to the method, the actual testing frequency is greatly reduced, and the optimal matching scheme of the cutter and the coating, which can prolong the service life of the cutter, reduce the machining cost and improve the machining quality and is suitable for different machining scenes, is quickly and accurately found.

The invention discloses a sulfur-containing free-cutting titanium alloy without heavy metal and a preparation method thereof, and belongs to the field of nonferrous metal materials. The free-cutting titanium alloy material comprises the following components in percentage by mass: S: 0.2-0.4%; 0.3 to 0.45 percent of O; b: 0.003% to 0.006%; c is less than or equal to 0.03%; less than or equal to 0.03% of N, and the balance titanium and unavoidable impurities. The invention further discloses a preparation method of the raw material sponge titanium of the free-cutting titanium alloy material and a method for preparing the free-cutting titanium alloy material. Through unique component design and a preparation process, addition of heavy metal for fixing S in the free-cutting titanium alloy is avoided, so that the titanium alloy is better in biocompatibility, titanium-sulfur compounds in the titanium alloy are uniformly distributed, the chip breaking property and the tool nose lubricating condition are improved, and the service life of the free-cutting titanium alloy is prolonged. The problems of distribution uniformity of the element S and the element B and cracking of the hot working surface of the titanium alloy material containing the element S are solved, the production period is shortened, the cost is reduced, and the cutting performance of the titanium alloy is remarkably improved.

The present invention relates to the technical field of other processing of metals. Disclosed are a free-machining titanium material and a preparation process therefor. The free-machining titanium material comprises: a matrix component group and free-machining component groups, wherein at least one of the free-machining component groups is added to the matrix component group; the matrix component group comprises the following components in percentage by mass: 0-1.0% of Fe, 0-0.08% of N, 0-0.02% of H, 0-0.50% of O, 0-8.0% of Al, 0-15.0% of V, and the balance being titanium and inevitable impurities; and the free-machining component groups are an RE element and S element group, a Cu element and S element group, a Zr element group, a C element group, a B element group, and an Mg element group, respectively. The preparation process involves producing the described free-machining titanium material by using any one of the following three methods: vacuum arc remelting, vacuum floating melting, and powder metallurgy. The present invention solves the technical problem of how to further improve the machinability of titanium materials.

The invention relates to the technical field of state monitoring of numerical control machine tools, in particular to an embedded monitoring method for cutter wear of a numerical control machine tool. The method comprises the following steps: performing embedded monitoring and synchronous multi-modal data acquisition and preprocessing on a tool in a machining process to form a real-time working condition data frame queue; cutting effective interval data interception is carried out on the real-time working condition data frame queue to obtain an effective cutting data sequence; performing current and cutter feeding rate discretization processing on the effective cutting data sequence to form an energy-effect reference fingerprint; extracting an expected healthy feed rate from the energy-effect reference fingerprint; and performing performance deviation absolute amount calculation according to the expected healthy feed rate, and performing cutting performance attenuation analysis to obtain the cutting performance attenuation degree. According to the method, a complete process from detection to parameter adaptive closed-loop control is realized on a resource-limited embedded system, so that the service life of a cutter is prolonged, the machining quality is guaranteed, and the production efficiency is improved.

The invention discloses a 1500MPa-grade ultrahigh-strength titanium alloy fastener which is obtained by sequentially performing heat treatment, head upsetting and thread rolling forming on ultrahigh-strength titanium alloy, and the ultrahigh-strength titanium alloy comprises the following elements in percentage by mass: 5-6% of Al, 3-4% of Mo, 3-4% of V, 5-6% of Cr, 1-2% of Nb, 2-3% of Zr, not more than 0.5% of Fe and the balance of Ti and inevitable impurities. According to the titanium alloy fastener, it can be guaranteed that the titanium alloy obtains high strength by adding the high Cr element, meanwhile, the machinability of the titanium alloy material is improved by adding the proper content of Mo and Nb elements, forming of the ultrahigh-strength titanium alloy fastener is facilitated, and the titanium alloy fastener is suitable for the technical field of titanium alloy fasteners.

This invention provides a copper alloy and its preparation method. The copper alloy has the following mass percentage composition: Ni: 0.5–2.0 wt%, S: 0.3–0.8 wt%, P: 0.1–0.3 wt%, Sn: 0.1–0.2 wt%, Si: 0.05–0.2 wt%, with the balance being Cu and unavoidable impurities. The microstructure of the copper alloy contains Cu₂S particles. This invention designs the composition and microstructure of the copper alloy, particularly controlling the content range of Ni, P, and Si elements to give the material high strength and high conductivity. Furthermore, the addition of S element forms Cu₂S particles, thereby improving the material's machinability and facilitating its fabrication into connector components.

The invention discloses a production method for improving the manganese sulfide form of a medium-carbon high-sulfur free-cutting steel wire rod and the medium-carbon high-sulfur free-cutting steel wire rod, and the production method comprises the following steps: adding a silicon-manganese alloy and a high-manganese alloy into molten steel for deoxidation alloying in the tapping process of a converter or an electric furnace, and adding lime, ferro-aluminum is not used in the tapping process, and the oxygen content of molten steel in an argon station behind the furnace is 20-40 PPm; lime, calcium carbide and ferrosilicon powder are adopted for slagging in the refining process, and aluminum-containing materials are strictly prohibited from being adopted; the refining outbound oxygen content is controlled to be 10-25 PPm; a weak cooling and slow drawing process is adopted for continuous casting, and the degree of superheat of molten steel is controlled to be 25-35 DEG C in the continuous casting process; during hot rolling, rolling is carried out by adopting 60-70% of large rolling reduction from initial rolling to 1080 DEG C; according to the method, the manganese sulfide form and distribution state of the medium-carbon high-sulfur free-cutting steel can be improved, the cutting performance of the medium-carbon high-sulfur free-cutting steel wire rod is improved, and the machining cracking rate is reduced.

The thin-gauge ultrahigh-strength non-oriented silicon steel comprises the following chemical components in percentage by mass: less than or equal to 0.002% of C, 3.1%-4.0% of Si, 0.3%-0.7% of Mn, less than or equal to 0.01% of P, less than or equal to 0.001% of S, 0.5%-1.2% of Als, 0.01%-0.08% of Sn, less than or equal to 0.002% of N, less than or equal to 0.001% of Ti, less than or equal to 0.002% of Nb, less than or equal to 0.002% of V and the balance of Fe and inevitable impurities, and Sieq is equal to [wSi] + 2 [wAl]-0.5 [wMn]. According to the technical scheme, trace alloy elements do not need to be added, the alloy smelting difficulty can be reduced, the smelting production cost is saved, meanwhile, the means of increasing deformation structures and improving the content of silicon, aluminum and manganese elements are adopted, and the material has the advantages of being high in strength, high in electromagnetic performance and excellent in machinability at the same time.

According to the preparation method of the free-cutting lead brass alloy, trace elements such as tellurium, cobalt, samarium and selenium are added into lead brass, the tellurium, the selenium and the like can easily form low-melting-point compounds with other elements, grain growth can be inhibited, dispersed distribution of fine lead particles is promoted, stress concentration is reduced, and the cutting performance is improved; by adding cobalt, samarium and the like, grain refinement is facilitated, distribution and forms of selenium, tellurium and other elements are changed, alloy fluidity is promoted, dispersed distribution of lead and the like is promoted to be more uniform, the cutting performance is further improved, in addition, dissolution of lead can be inhibited through the passive film layer, the environment-friendly performance is improved, and harm caused by dissolution of lead is reduced.

The invention discloses a material cutting performance evaluation method, device and equipment and a medium, and the method comprises the steps: controlling a milling cutter of a milling machine to mill a to-be-tested material according to preset milling parameters in a feeding direction perpendicular to the to-be-tested material under the condition that a test state is satisfied between fixed equipment and the to-be-tested material, so that a milling surface is formed on the to-be-tested material; controlling the force measuring equipment to monitor the actual milling force applied to the to-be-measured material by the milling cutter in the milling process; roughness detection equipment is controlled to detect the milling face, and the actual roughness is obtained; and evaluating the cutting performance of the to-be-tested material according to the actual milling force, the actual roughness and a preset index. Therefore, by integrating milling, real-time force measurement and surface roughness detection, a set of multi-index collaborative comprehensive evaluation system is constructed, and the cutting force and the machined surface quality can be quantitatively acquired and analyzed at the same time, so that the cutting machining performance of the material is simply, quickly, comprehensively and objectively reflected.

The invention relates to the technical field of metallurgy, and provides brass and a preparation method thereof.The preparation raw materials of the brass comprise the following components of 0.05-0.15 wt% of Al, 0.05-0.15 wt% of Cu, 0.05-0.15 wt% of Ti, 0.05- Si, 0.05 wt% to 0.15 wt%; 0.05 to 0.12 wt% of Fe; sn, 0.03 wt% to 0.20 wt%; 0.40 to 2 wt% of Bi; 0.40 to 2 weight percent of In; 32 to 45 wt% of Zn; and the balance of Cu. The brass prepared through the composition proportion of all the preparation raw materials has a stable alpha phase, a stable beta phase and a stable In-rich phase, the alpha phase is a matrix phase, the beta phase is distributed in the alpha phase, the In-rich phase is distributed in the alpha phase and at the grain boundary, the cutting performance of the brass can be improved while the strength, wear resistance and corrosion resistance of the brass are guaranteed, and the service life of the brass is prolonged. And a brass product prepared from the brass prepared from the elements greatly reduces pollution and harm to the environment and human bodies.

Provided are a non-quenched and tempered steel wire rod with improved machinability and impact toughness and a method for manufacturing the same. The non-quenched and tempered steel wire rod according to the present disclosure includes, in percent by weight (wt%), 0.3% to 0.5% of C, 0.4% to 0.9% of Si, 0.5% to 1.2% of Mn, 0.02% or less of P, 0.01% to 0.05% of S, 0.015% to 0.05% of sol.Al, 0.1% to 0.3% of Cr, 0.007% to 0.02% of N, and the remainder including Fe and inevitable impurities, has a microstructure in which an average thickness of the pearlite layer in a L cross-section, which is parallel to a rolling direction, is 30 µm or less, an average grain size of ferrite is 20 µm or less, and Relational Expressions 1 to 5 are satisfied. 20≤Mn / S≤70 1.4≤Al / N≤7 0.7≤Mn+Cr≤1.4 0.2≤C / Mn≤0.7 0≤Mnc / Mnf≤3.

The invention discloses an Al-Cu-Sc aluminum alloy wire for electric arc additive manufacturing and a preparation method of the Al-Cu-Sc aluminum alloy wire. The preparation method comprises the steps that S1, molten aluminum is smelted; s2, electromagnetic stirring; s3, refining and degassing; s4, carrying out online filtration; s5, continuous casting is conducted, specifically, the aluminum melt is quantitatively guided into a crystallization wheel and cooled and solidified through the crystallization wheel, and an aluminum rod blank is obtained; and S6, continuous extrusion is conducted, specifically, the aluminum rod blank is transferred into continuous extrusion equipment, the aluminum rod blank is guided into an extrusion wheel groove to be subjected to radial extrusion after being straightened, subjected to oxide skin scraping and cleaned, and a wire blank is obtained. According to the preparation method disclosed by the invention, the structure of the wire rod blank subjected to a continuous extrusion process is fully crushed through violent shear deformation, the wire rod blank has a compact and fine shear deformation grain structure, the wire rod blank has good drawing machinability, and the wire rod blank can be drawn and scraped to the size of a finished product only through one-time intermediate annealing in the subsequent processing process; the production efficiency is improved, and the cost is reduced.

The present invention can realize better cutting performance while suppressing an influence of, for instance, deflection of a head and an increase in a moment acting on a fastening mechanism even when a cutting insert of a long total length is used. A shank of a head replaceable type cutting tool includes: a fastening mechanism that is formed at a leading end part in a longitudinal direction of the shank, and attaches a head; and a recessed part that is formed at the leading end part so as to accommodate a part of a cutting insert held by the head and avoid an interference with the cutting insert. The recessed part may be provided to accommodate a non-use part of the cutting insert held by the head in a state where the head is attached to the leading end part, and avoid an interference with the cutting insert.

The invention belongs to the technical field of soft magnetic stainless steel, and provides a soft magnetic stainless steel wire rod with ultrahigh corrosion resistance, good machinability and excellent plasticity and toughness and a preparation method of the soft magnetic stainless steel wire rod. The stainless steel wire rod comprises the following chemical components in percentage by mass: less than or equal to 0.020% of C, 1.20 to 2.00% of Si, less than or equal to 0.50% of Mn, 18.0 to 20.0% of Cr, less than or equal to 0.30% of Ni, 2.50 to 3.00% of Mo, less than or equal to 0.020% of N, less than 0.020% of P, 0.008 to 0.015% of S, 0.030 to 0.050% of Se, 0.20 to 0.30% of Nb and the balance of Fe and inevitable impurities. The material has ultrahigh corrosion resistance, excellent soft magnetic performance, good free-cutting performance and good plasticity and toughness, is suitable for subsequent drawing machining and turning machining, and has a wide market application prospect. And the preparation method provided by the invention is high in yield and suitable for industrial large-scale production.

The invention belongs to the technical field of mechanical components, and discloses a low-density steel induction tooth and a manufacturing method thereof. The low-density steel induction tooth comprises the following chemical components in percentage by mass: 0.7%-1.1% of C, 5%-11% of Al, 0.3%-0.9% of Si, 10%-15% of Mn, 3%-5% of Ni, 0.3%-0.8% of V, 0.001%-0.002% of Ce and the balance of Fe. The manufacturing method of the low-density steel induced tooth comprises the following steps: preparing materials; manufacturing an induction tooth type shell; melting the raw materials to form molten steel; deoxidizing and deslagging the molten steel; the mass percent contents of Al, Ce and Fe in the molten steel are adjusted to meet the set requirements of the components of the low-density steel induction teeth; molten steel is poured, and induction teeth are formed; and carrying out water toughening treatment on induced teeth. By controlling the chemical components of the low-density steel, the content of Mn in the steel is reduced, and the strength of the steel is guaranteed; the content of microalloy elements in the steel is controlled, the machinability of the steel is improved by adding rare earth, the rare earth adding time is accurately controlled in the smelting process, and the quality of the induced teeth is improved.

The invention relates to the technical field of drilling tools, and discloses a micro-texture drilling tool, a micro-texture structure design method and a micro-texture drilling tool. The micro-texture drilling tool comprises a front tool face, a tool nose, a main cutting edge and a micro-texture structure, the micro-texture structure is arranged on the front tool face, and the micro-texture structure comprises a near-field design area and a plurality of micro-texture units; wherein the near-field design area extends in the direction of the main cutting edge, the contour of the near-field design area is determined by a wear area on the front cutter face, the plurality of micro-texture units are arranged in the near-field design area, each micro-texture unit extends in the flowing-out direction of cuttings, the flowing-out direction of the cuttings is determined by scratches of the cuttings on the front cutter face, and the micro-texture units are arranged in the near-field design area. Compared with a traditional micro-texture position design, the method has the advantages that the micro-texture placement area is determined more accurately, the scientific design concept is better met, the micro-texture units are arranged in the chip flowing-out direction, derivative cutting defects caused by the micro-texture units in the cutting process can be well avoided, and the cutting performance is improved.

The rolling method comprises the following steps that a steel billet enters a heating furnace to be heated, the temperature of a preheating section is smaller than or equal to 700 DEG C, the passing time ranges from 30 min to 45 min, the temperature of a heating section I ranges from 900 DEG C to 1100 DEG C, the passing time ranges from 30 min to 45 min, the temperature of a heating section II ranges from 1100 DEG C to 1300 DEG C, the passing time ranges from 15 min to 30 min, the temperature of a soaking section ranges from 1150 DEG C to 1250 DEG C, and the passing time ranges from 15 min to 30 min; and the heated steel billet is rolled, heat preservation and cooling are conducted after rolling, and the free-cutting flat steel is obtained. The initial rolling temperature is 1100-1180 DEG C, the final rolling temperature is 980-1030 DEG C, and the rolling is divided into three stages of rough rolling, intermediate rolling and finish rolling. MnS in the free-cutting flat steel produced by adopting the rolling method is uniformly distributed, and the anisotropy of the cutting performance is obviously reduced.

The invention belongs to the technical field of material surface modification, and provides a method for in-situ preparation of a woodworking tool based on a laser alloying technology, and an alloying modified layer with excellent mechanical and cutting performance is formed in situ on a cheap tool body blade part through optimal design of alloying components and effective regulation and control of a technological process. The requirements of the woodworking tool for comprehensive performance such as high hardness, high wear resistance, high thermal stability, good obdurability and the like under the cutting conditions of high speed and impact load bearing are met. Meanwhile, the method has the advantages of being simple in technological process, high in preparation efficiency, wide in adaptability, high in economical efficiency and the like.