15results about How to "Improve red hardness" patented technology

The invention discloses a hot-rolled pickled steel plate for a saw blade and a manufacturing method of the hot-rolled pickled steel plate. The technical problems that existing high-carbon and high-manganese steel with the thickness of 2.5-7.0 mm for the saw blade is prone to segregation, poor in structure uniformity and thick and large in pearlite structure are mainly solved. According to the technical scheme, the hot-rolled pickled steel plate for the saw blade comprises the following chemical components in percentage by weight: 0.75%-0.85% of C, 0.20%-0.50% of Si, 0.20%-0.50% of Mn, less than or equal to 0.020% of P, less than or equal to 0.005% of S, 0.01%-0.02% of Al, less than or equal to 0.0060% of N, 0.4%-0.8% of Cr, 0.18%-0.28% of V and the balance of Fe and inevitable impurity elements. The metallographic structure of the hot-rolled pickled steel plate is superfine pearlite with the interlamellar spacing of 0.4-0.8 mu m, and the hot-rolled pickled steel plate is used for production of circular saw webs, chain saws, frame saws and the like.

The invention discloses metal ceramic spraying powder and a preparation method thereof, and relates to the technical field of metal ceramic powder spraying materials. The metal ceramic spraying powder comprises one or more of titanium carbonitride, titanium carbide and titanium nitride; the metal ceramic spraying powder disclosed by the invention is uniform in component and has excellent sphericity, so that the spraying powder is good in flowability, and an obtained coating is good in stability; the coating formed by the spraying powder and the matrix metal surface layer is high in binding force, the advantages of corrosion resistance, high temperature resistance, low porosity, high density, high red hardness and the like are also achieved, and the preparation method is simple, easy to implement, low in cost and easy for mass production.

The invention relates to a high red hardness alloy material and a preparation method thereof, belonging to the technical field of alloy materials; the alloy material is composed of an M2 high-speed steel substrate and a cladding layer, wherein the cladding material of the cladding layer is the following components: 52-58wt% of N-tungsten carbide tantalum micropowder, 6.5-9wt% of chromium carbide powder and 3.2-4.4wt% of nickel powder, and the remainder is atomized iron powder; the N-tungsten carbide tantalum micropowder is substituted by diethylenetriamine and cyanuric chloride to prepare a nitrogen-carbon-rich compound cluster, i.e., a template agent; the complexation of a multi-component nitrogen structure in the template agent structure is utilized to capture tungsten and tantalum elements in a liquid phase environment, and high-temperature hydrolysis is performed to form a composite, i.e., a precursor; during a sintering process in a plasma sintering furnace, the template agent is thermally decomposed to form a composite carbide with tungsten and tantalum; the decomposed nitride is in-situ nitrided and doped with the composite carbide at a high temperature to form nitrogen-doped tungsten carbide tantalum particles; and the hardness of the cladding layer reaches 63.9-65.1HRC.

The invention discloses an acid-corrosion-resistant crushing tool bit for crushing blast furnace titanium slag and a preparation method of the acid-corrosion-resistant crushing tool bit, and belongs to the technical field of tool bit manufacturing, the acid-corrosion-resistant crushing tool bit is composed of, by mass, 12.3% of Cr, 5.2% of V, 9.1% of W, 3.3% of Mo, 1.1% of Co, 4.5% of Mn, 5.2% of Ti, 0.5% of Si, 0.3% of C and the balance Fe, the acid-corrosion-resistant crushing tool bit comprises a tool body, and a plurality of tooth tool edges are integrally formed on the tool body. A preparation method of the crushing tool bit comprises the steps that all the components are put into a crucible to be heated and smelted to form a melt, and then casting, normalizing treatment, machining and heat treatment processes are conducted to obtain the crushing tool bit. And other elements can be tightly combined with iron, so that the crushing tool bit with high corrosion resistance, high hardness, high strength and high wear resistance is formed.

The invention discloses a punch for processing a high-lock bolt driving groove, which comprises a limiting base (1), a purple titanium coating (2), a supporting rod (3), an abutting head (4) and a punch (5), and is characterized in that the limiting base (1) is arranged on the supporting rod (3); the outer surface of the punch (5) is covered with a purple titanium coating (2), the punch (5) and the supporting rod (3) are integrated, the supporting rod (3) and the abutting head (4) are integrated, and the purple titanium coating (2), the supporting rod (3), the abutting head (4) and the punch (5) penetrate into step-shaped holes formed in the limiting base (1). The device is small in abrasion and low in cost.

The application provides a diamond multi-blade contour forming tool and a preparation method thereof, V is partially replaced by Nb, the content of V is strictly controlled, high-hardness VC is replaced by low-hardness NbC, and the grain boundary is purified and the carbide is refined by rare earth Ce, so that the grinding performance is multiplied compared with existing high-speed steel, the industry pain point that high hardness and easy grinding cannot be achieved at the same time is solved, and the machining difficulty and production cost of complex multi-blade contour are greatly reduced. The uniformity of the base body composition is ensured by vacuum melting + electroslag remelting, the coarse carbide is broken by multi-directional forging, the strength and toughness balance is realized by sectional preheating precise quenching + three times tempering, the high-strength combination of the PCD composite sheet and the tool body is realized by vacuum brazing, the contour precision control within ± 2 mu m is realized by five-axis precision grinding, and the forming tool perfectly adapts to the high-precision machining demand of the complex special-shaped structural part of consumer electronics.

The invention discloses a high-speed steel working roll and a preparation method thereof, and belongs to the technical field of roll preparation, the high-speed steel working roll comprises an outer layer and a core part, the outer layer comprises the following alloy components in percentage by weight: 1.20-2.50% of C, 0.30-1.50% of Si, 0.40-1.50% of Mn, and less than or equal to 0.03% of P; the steel comprises the following components in percentage by weight: less than or equal to 0.03% of S, 3.00-8.00% of Cr, 0.20-2.00% of Ni, 3.00-9.00% of Mo, 2.00-9.00% of V, 0.50-3.00% of W, 0.20-1.00% of Nb and the balance of Fe and inevitable impurities. And the core part is made of nodular cast iron. The method can effectively improve the heat crack resistance and wear resistance of the high-speed steel working roll, is more suitable for hot continuous rolling and finish rolling front-section rack working rolls, reduces roll consumption while improving the rolling efficiency, and improves the technical level and economical efficiency of the whole hot rolling production process.

The invention discloses a centrifugal composite high-carbon high-speed steel roller and a preparation method, and belongs to the technical field of rollers, the preparation method comprises the following steps: S1, raw materials of a working layer and a core part are respectively put into an electric furnace for smelting, and working layer molten steel and core part molten steel are respectively obtained; s2, molten steel of the working layer is poured into a cold mold cavity of a horizontal centrifugal machine, and meanwhile casting powder is added in the pouring process; s3, a cold type cavity of the horizontal centrifugal machine is sealed through a plug and a centrifugal machine cover, and convection between a casting mold in the cold type cavity and outside air is reduced; s4, when the temperature of the inner cavity of the working layer reaches 1030-1037 DEG C, the speed of the centrifugal machine is reduced until the centrifugal machine stops rotating, and then casting powder is poured out; and S5, after the working layer molten steel is solidified, the core molten iron is spheroidized, and then the spheroidized core molten iron is poured into an inner cavity of the working layer. The wear resistance of the working layer of the roller and the flaw detection quality and strength of the bonding layer are guaranteed, the stripping risk of the working layer is reduced, and the yield is increased.

This utility model provides a corrugated paper cutting knife for carton production, belonging to the field of corrugated paper carton production technology. The corrugated paper cutting knife includes a blade body with a cutting edge for cutting corrugated paper and a mounting hole for fixing the blade body to a cutting device. The cutting edge includes a first cutting edge and a second cutting edge connected in sequence. The first cutting edge is used for initial cutting of the corrugated paper, and the second cutting edge is used for final cutting. A chip removal groove is provided on at least one side of the blade body for discharging paper scraps generated during the cutting process. A groove is provided on the side wall of the blade body to reduce resistance during cutting and reduce tool wear. This invention solves the problems of existing corrugated paper cutting knives that easily generate a large amount of paper dust and lint during cutting, resulting in rough cutting edges, rapid tool wear, and short tool life, which affect the production quality and efficiency of cartons.

The invention relates to the technical field of ferrous metallurgical equipment maintenance and welding repair, and discloses a steel billet hydraulic shear cobalt-based alloy blade repair method which comprises the steps that S1, pretreatment is conducted, low-pressure sand blasting cleaning is conducted, a failure layer is removed, and a carburized layer of 0.05-0.2 mm on the groove wall is polished and removed; s2, a Co-Cr-W-C cobalt-based welding wire with a certain proportion is selected and used; s3, surfacing welding is conducted, specifically, a cutting edge is preheated to 280-320 DEG C, the temperature of a tool apron is strictly controlled to be not higher than 180 DEG C, multi-layer and multi-pass surfacing welding is conducted through a TIG welding machine, and stress relief annealing is conducted at the temperature of 560-600 DEG C after surfacing welding; and S4, machining and grinding to recover the geometric dimension. According to the method, through carburized layer removal, gradient temperature control and a special heat treatment system, the problems that cracks and air holes are prone to being generated in cobalt-based alloy welding and a tool apron base body is softened and deformed due to overheating are effectively solved, the metallurgical bonding strength, high-temperature abrasion resistance and thermal fatigue resistance life of a repaired blade are improved, and the service cycle of equipment is prolonged to a large extent.

The application relates to the technical field of alloy materials, in particular to a 4341E high-speed steel and a preparation method thereof. The high-speed steel is characterized in that Ti, B and N elements are introduced for ternary micro-alloying and synergistic modification on the basis of a W-Mo-V-Co component system, nanoscale particles generated in-situ by Ti-N are used as heterogeneous cores to significantly refine grains, the grain boundary is strengthened by the grain boundary segregation effect of boron elements, and the reticular carbide is effectively broken. The obtained steel material realizes perfect matching of high hardness, excellent red hardness and excellent impact toughness, solves the problem that the strength and toughness of traditional high-speed steel are difficult to be compatible, and is particularly suitable for manufacturing high-performance cutting tools, cold and hot precision dies and high-temperature wear-resistant parts.

This invention discloses a process for manufacturing an impact-resistant and wear-resistant ultra-hard metal-based composite layer and a straightening roller, comprising an alloy groove coating layer one, an alloy groove coating layer two, and an alloy working layer; both alloy groove coating layer one and alloy groove coating layer two have sinusoidal structures, are staggered, and have at least one set of intersection nodes between them, and are located inside the alloy working layer. By introducing V and Nb into the original formulation and precisely adjusting the proportions of components such as Co, Ni, Cr, C, B, and Si to meet the requirements, the composite layer retains high hardness and good oxidation resistance, impact resistance, thermal shock resistance, and corrosion resistance at high temperatures, improving the spraying process performance of the alloy coating and increasing the deposition rate.

The application discloses a high-speed steel roller ring for rail beam rolling and a manufacturing method thereof, and belongs to the technical field of roller ring preparation. The high-speed steel roller ring comprises a high-speed steel working layer and a graphite steel core part. The chemical components and mass percentage of each component of the working layer are as follows: C 1.0-2.0%, Si 0.2-1.0%, Mn 0.5-1.0%, Cr 4.0-8.0%, Ni 1.0-3.0%, Mo 4.0-6.0%, V 1.0-3.0%, W 1.0-3.0%, P≤0.03%, S≤0.03%, and the rest is Fe and inevitable impurities. The chemical components and mass percentage of each component of the core part are as follows: C 1.0-2.0%, Si 1.0-3.0%, Mn 0.5-1.0%, Ni 0.2-1.0%, Mo 0.1-0.5%, Cr≤0.2%, P≤0.03%, S≤0.03%, and the rest is Fe and inevitable impurities.

The utility model relates to the technical field of alloy drill bits, in particular to an anti-bonding alloy drill bit for automobile machining, which comprises a drill rod, an adjusting component is arranged in the drill rod, a connecting rod is connected to the outer side of the adjusting component, a drill bit is fixedly connected to the upper portion of the connecting rod, and a protection structure is arranged on the outer side of the connecting rod. The connecting rod is wrapped by the two groups of annular plates of the protection structure, the inserting rod at one group of annular plates penetrates through the connecting rod and is in threaded connection with the other group of annular plates, then the fixing ring body is installed below the annular plates in a threaded mode, and the two groups of annular plates are fixed on the outer side of the connecting rod. And subsequently, a rotary button can be rotated to drive a transmission rod and a first bevel gear to rotate, the first bevel gear drives a second bevel gear to rotate, the second bevel gear drives a screw rod to rotate, and the effect of adjusting the length of the whole drill bit is achieved.

This invention discloses a metal-ceramic material with a white core and black ring structure and its preparation method. The metal-ceramic material comprises, by mass percentage, the following raw materials: Ti(C) 0.3 N 0.7 ) is 10% to 20%, Ti(C) 0.5 N 0.5 The metal-ceramic material contains 40%–50% Fe, TaC 1%–4%, WC 15%–30%, TiWC 0%–10%, Mo2C 2%–5%, Cr3C2 0.2%–1.2%, and the total content of Co and Ni is 8%–14%. Carbon powder is also added to this metal-ceramic material, with the amount of carbon powder added being 0.35%–1% of the total mass of all raw materials. The metal-ceramic material of this invention has advantages such as high hardness, high toughness, and excellent impact resistance, with a Vickers hardness reaching 1641 HV. 30 Its fracture toughness can reach 11.23 MPa.m. 1 / 2 Its flexural strength can reach 2648MPa.