3results about How to "Reduced germination" patented technology

The invention belongs to but is not limited to the technical field of nickel-based alloy additive manufacturing, and discloses a heat treatment method and system for reinforcing and toughening an additive-formed heterogeneous nickel-based alloy, and the chemical components of the additive-manufactured nickel-based alloy are qualitatively and quantitatively analyzed by utilizing EPMA; carrying out homogenization heat treatment design by utilizing Thermo-Calc software; based on the obtained heat treatment temperature and dendritic crystal spacing, a linear curve of distribution of elements along with time diffusion is obtained, and the optimal temperature and time of homogenization heat treatment of the nickel-based alloy are obtained; and respectively calculating TTT phase diagrams corresponding to dendritic crystal nuclei and interdendritic crystal regions by utilizing a TTT phase diagram module in JMatPro software, and obtaining the optimal temperature and time of the stress relief heat treatment of the nickel-based alloy based on the characteristics of the precipitated phase of the nickel-based alloy. According to the method, a uniform grain structure is obtained after the material is rapidly cooled, the residual stress level in a component is reduced, and the strength and toughness of the material are improved.

The utility model relates to the technical field of butterfly orchid tissue culture, in particular to a seed germination device for butterfly orchid tissue culture, which comprises a connecting box, a guide groove and supporting legs, the outer side of the connecting box is movably connected with a sliding plate, the outer side of the connecting box is fixedly connected with a storage box, the outer side of the connecting box is fixedly connected with a water spray pipe, and the water spray pipe is fixedly connected with a water outlet. An air conveying pump is fixedly connected to the outer side of the connecting box, an air spraying opening is fixedly connected to the outer side of the connecting box, and by starting a pushing hydraulic rod, a containing disc is moved out of the device, the containing disc is pulled out, seeds are placed in the containing disc, the containing disc is placed in a fixing shell, and the fixing shell is pushed into the device; in the seed placement and germination process, air in the seeds is replaced by starting an air conveying pump, water in a storage box is conveyed to a water spraying pipe by starting a conveying pump, the water is discharged from a water spraying head, and air and the seeds are humidified through hammering of the air.

The application provides a polymethyl methacrylate product and a preparation method thereof. The preparation method of the polymethyl methacrylate product comprises the following steps: S1. mixing a resin matrix, a toughening agent, an antioxidant and a light stabilizer to obtain a mixture; the resin matrix comprises a polymethyl methacrylate resin; the toughening agent comprises a core-shell structure toughening agent and a polyester-based toughening agent; the core-shell structure toughening agent comprises a core and a shell layer; the core comprises polybutyl acrylate, and the shell layer comprises polymethyl methacrylate; S2. melt blending, extruding and granulating the mixture, and drying, injection molding, cooling and annealing. In the application, the core-shell structure toughening agent and the polyester-based toughening agent can synergistically improve the toughening effect.