7results about How to "Improve red hardness" patented technology

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.

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.

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.