2results about How to "Adjust content" patented technology

This invention relates to a method for preparing a non-uniform diffusion coating on the surface of an elevator safety clamp block. The invention first performs a specific heat treatment on the clamp block substrate to control the grain size of the substrate, thereby better supporting the surface coating. The first diffusion layer close to the substrate contains laser-infiltrated alloyed Al and / or Si elements, which not only improves the strength of the underlying coating but also utilizes the Al / Si to form a stable Al2O3 and SiO2 oxide film during high-temperature friction, improving the coating's resistance to high-temperature oxidation. The Fe3C, Fe2B, and FeB compounds intermingled in each diffusion layer, through the second-phase reinforcement of carbides and borides, not only improve the coating's wear resistance but also regulate and stabilize the coating's friction coefficient by controlling the content and distribution of carbides and borides. Thus, the coating of this invention can balance wear resistance, heat resistance, and the stability of frictional braking force, avoiding problems such as reduced frictional braking force and braking failure during braking.

The present application belongs to the technical field of synthesis of all-organic polymer dielectric film, and particularly relates to a copolymerized polyamide with dielectric function containing nylon 1 chain segment and a preparation method, the preparation method of the dielectric polyamide film containing nylon 1 chain segment comprising the following steps: synthesis of nylon 1 with different polymerization degrees, butane diacid anhydride end-capping nylon 1, and salt formation of the end-capped product (referred to as "PA1 diacid") and piperazine, copolycondensation reaction of piperazine-PA1 diacid salt and piperazine-dodecanedioic acid salt, and hot-pressing forming, etc. In the present application, the piperazine-PA1 diacid salt and the piperazine-dodecanedioic acid salt are copolycondensed through high temperature and high pressure, the high dielectric constant of the nylon 1 chain segment is combined with the unique low dielectric loss of the piperazine nylon, the nylon 1 is embedded into the piperazine nylon matrix as a dielectric function chain segment, and the dielectric polyamide film containing the nylon 1 chain segment is directly prepared through simple hot-pressing forming.