7results about How to "No chipping" patented technology

This invention relates to a wear-resistant, long-life shot peening agent. The shot peening agent, by mass percentage, comprises: C: 0.55-1.0%, Si: 0.25-0.65%, Mn: 5.8-10.5%, Cr: 3.0-7.0%, Ni: 5.6-8.4%, B: 0.0015-0.004%, P: less than 0.05%, S: less than 0.03%, with the balance being Fe and unavoidable impurities. The shot peening agent is prepared by water atomization or gas atomization of molten steel with the above composition. The shot peening agent is then heated to 820-900℃ and held, followed by quenching to room temperature at a quenching cooling rate of V1≤V≤V2. The unit is ℃ / s, where: V1=8.58*ln(103.8-11.27*[B]-5.78*[Mn]-3.16*[Cr]-1.88*[Si]-1.05*[Ni]-2.14*[C])+13.7; V2=37.5+3018*[B]-1.5*[Mn]+5.4*[Cr]-2.1*[Ni]-6.2*[Si]+37.9*[C]; where [C], [Si], [Mn], [Cr], [Ni], and [B] represent the mass percentage content of C, Si, Mn, Cr, Ni, and B, respectively.

A composite ceramic nozzle for a distributor comprises a ceramic tube core, an inner sleeve and an outer sleeve, an outer ring groove and an outer flange are arranged on the ceramic tube core, the outer flange is located at the outlet end of a medium, and a check ring is installed in the outer ring groove; the inner sleeve is sleeved on the ceramic tube core and is limited between the retainer ring and the outer flange; the inner sleeve is provided with a local external thread, the outer sleeve is provided with an inner flange and a local internal thread, after the outer sleeve is in threaded connection with the inner sleeve, the inner flange of the outer sleeve abuts against the medium inlet end of the ceramic tube core, and a first annular space is formed in a non-threaded area between the inner sleeve and the outer sleeve. When the composite ceramic nozzle and the distributor are fully welded, the welding position is located at the position, corresponding to the first annular space, of the outer sleeve, the first annular space can release welding deformation of the outer sleeve, the inner sleeve can isolate deformation of the outer sleeve, and the situation that the welding deformation and residual stress of the welding deformation directly act on the ceramic tube core, and the ceramic tube core is squeezed to be cracked and broken is avoided.

The application provides a high-entropy light-weight hard alloy cement high-pressure roller mill stud and a preparation method thereof and a high-pressure roller mill, and relates to the field of studs. The high-entropy light-weight hard alloy cement high-pressure roller mill stud comprises raw materials including an alloy and C powder, and the alloy, with a total mass of 100%, comprises 56-60% TiCN, 20-24% TiC and 20-24% Fe-Ni-Co-Cr-Mo-Cu alloy; the C powder accounts for 0.2-0.5% of the mass of the alloy. The high-entropy light-weight hard alloy cement high-pressure roller mill stud has a uniform distribution of metallographic microstructure, high density, few internal pores, better ductility and toughness, no collapse phenomenon in the use of multiple batches of cement mines, good wear resistance, and a service life that can be increased by 40-50%.

The utility model discloses an N-type TOPCon single-sided cell, which relates to the technical field of solar cells and comprises a placement box, a polycrystalline silicon layer is arranged on the bottom surface of the inner wall of the placement box, and a p-type emitter is adhered to the upper side of the polycrystalline silicon layer. According to the utility model, the polycrystalline silicon layer is made of the N-type polycrystalline silicon film and the protective layer made of the silicon nitride material, so that the uniformity of the doped polycrystalline silicon layer can be greatly improved, the overall process time is further shortened, the doped polycrystalline silicon layer is protected, the conversion efficiency of the TOPCon battery is improved, and the passivation layer made of the eva adhesive film material has high transparency and high adhesive force, so that the production efficiency of the TOPCon battery is improved. The protective layer made of the silicon nitride material has the characteristics of high hardness, lubricity, wear resistance, atomic crystal, oxidation resistance at high temperature, cold and hot impact resistance, and no fragmentation after being heated to 1000 DEG C in air; and the hardness and the service life of the battery can be ensured.

This invention provides a method for regenerating honeycomb activated carbon, comprising: (1) chemical cleaning: ultrasonic cleaning using a composite cleaning solution containing organic acid and low molecular weight polyethylene glycol; (2) structural repair: immersing the cleaned activated carbon in a repair solution containing carbon precursor and high molecular weight polyethylene glycol; (3) microwave regeneration: microwave heating under non-oxidizing gas protection, followed by cooling to obtain regenerated honeycomb activated carbon. This invention improves cleaning efficiency by using low molecular weight polyethylene glycol to assist the cleaning solution in entering hydrophobic micropores; and selectively retaining high molecular weight polyethylene glycol in microcracks and mesopores through a compounding process with the carbon precursor, resulting in in-situ deposition to fill microcracks and repair structural defects after carbonization. This invention features low regeneration temperature, minimal damage to the honeycomb structure, and a regeneration recovery rate of over 90% for specific surface area and over 88% for axial compressive strength, significantly extending the cycle life of the honeycomb activated carbon.

The invention discloses a high-speed laser processing device and method for ceramic substrate micropores, and aims to solve the problem of low ceramic substrate micropore processing efficiency. The device is characterized in that a laser outputs laser pulses to a light beam forming unit, the laser pulses are expanded and collimated and then reach a focusing unit comprising a galvanometer scanning head, and the focusing unit is used for focusing the ceramic substrate micropores; the galvanometer scanning head is connected with a high-speed micro-motion compensation mirror module, laser pulses reach a motion platform which continuously moves at a constant speed in the machining direction through a focusing unit, a sample table for bearing a workpiece is arranged on the motion platform, and a real-time position feedback device is arranged on one side of the motion platform. And the position feedback device, the galvanometer scanning head, the high-speed micro-motion compensation mirror module and the laser are in signal connection with a control system, so that a laser pulse focus is always aligned with a target hole site. Real-time synchronous laser machining of the platform in a high-speed continuous motion state can be achieved, the machining efficiency reaches ten thousand holes in a second level, and meanwhile high precision and high quality of micropore machining are guaranteed.

The invention relates to the technical field of material processing, and particularly discloses a splitting method for a brittle material, which comprises the following steps of: acquiring a target cutting inner contour of the brittle material, cutting a beam cutting point through a Bessel beam by adopting ultrafast laser to obtain a plurality of inner contour track holes, and heating and cutting a crack ring through CO2 laser to obtain a plurality of inner contour track holes. Enabling the crack ring to penetrate through the inner contour track hole ring to form a hole crack track; and the brittle material after hole crack track machining is integrally heated to the target temperature value, the target cutting inner contour is cooled, so that the target cutting inner contour is subjected to cold crack falling, the problem that cracks or edge breakage occurs in the existing brittle material in the mechanical cutting or laser cutting process is solved, the cracking effect is good, and the production efficiency is improved. The device can be compatible with different fragile material products and is suitable for splitting the products of different sizes and specifications, the fracture surfaces of the split pieces are smooth and free of edge breakage, and the machining efficiency and the product quality are greatly improved.