37results about How to "Poor toughness" patented technology

The present invention relates to an aqueous epoxy resin blend dispersion of a high mw epoxy resin and a liquid epoxy resin with a dispersant having an interfacial tension such that a drop of the mixture of the dispersant in a melt of the epoxy resin blend against water is less than 2 dynes / cm, preferably less than 1 dyne / cm, and a process for preparing this epoxy resin blend dispersion. Specifically, the process is a solvent free melt kneading or shearing dispersion process wherein the dispersion is processed at from 50 to 150° C., and the resulting dispersion is stable.

A polyamide comprising a unit containing at least one (a) alicyclic dicarboxylic acid and a unit containing a (b) diamine having 8 or more carbon atoms, wherein the polyamide satisfies the following conditions (1) and (2): (1) a sulfuric acid relative viscosity ηr at 25° C. is 2.3 or more; and (2) Mw (weight average molecular weight) / Mn (number average molecular weight) is 4.0 or less.

The present invention relates to the technical field of processing methods for deep hole processing equipment, in particular to the process of toughening and straightening gun drill rods for deep hole processing, comprising the following steps: 1) material selection, pipe making and forming, selecting high-quality alloy steel, tool steel or Carburized steel, processed into a deep hole processing gun drill pipe before heat treatment; 2) heat treatment strengthening and toughening and straightening integration, the deep hole processing gun drill pipe before heat treatment is hung vertically on the tooling, deep The counterweight is mounted on the bottom end of the hole processing gun drill drill pipe for carburizing, quenching, self-alignment of the counterweight or quenching and self-straightening; 3) tempering, straightening, and cooling. Compared with the prior art, this The invention uses high-quality alloy steel, tool steel or carburizing steel as raw materials, and through heat treatment in a protective gas furnace, vacuum furnace, and high-frequency furnace, under the gravity of the counterweight, self-alignment or carburizing and quenching of carburizing steel improves The carbon content is lowered, the toughness is strengthened; the heat treatment is strengthened and toughened and straightened, and the tempering process is self-aligned.

This method is a method for manufacturing a gas turbine blade, including:producing a gas turbine blade having a cooling pass inside thereof; andpartially coating an inner surface of the cooling pass with Al.The step of partially coating an inner surface of the cooling pass with Al further including:a first step of specifying a temperature range which satisfies both of oxidation resistance and fatigue strength and the temperature distribution of the inner surface of the cooling pass based on an examination result or result of a numerical analysis;a second step of setting an Al-coating-applying portion of the inner surface of the cooling pass as the temperature range specified at the first step; anda third step of applying Al coating only into the set Al-coating-applying portion.

The invention provides gluten-free instant hand-pulled noodles and a preparation method and a formula thereof and relates to the field of food deep processing. The gluten-free instant hand-pulled noodles are mainly prepared from cereals such as Chinese Northeast non-glutinous polished rice, Chinese Northeast non-glutinous unpolished rice, Chinese Northeast black rice and millet with manufactured goods which are rich in nutrition and have health care effect serving as minor ingredients by means of technologies of flour milling, flour mixing, standing for a while, primary extrusion, secondary extrusion, aging treatment, variable-temperature drying, ventilative cooling, bagging, inspection, sealing packing, boxing and the like. The obtained hand-pulled noodles are chewy, refreshing and slippery, avoid being mixed with soup, breakage and adhesion during cooking and are good in taste and sweet after taste. What is more important is that the noodles are smooth and pleasing in appearance and oily before being cooked and can completely reach the international highest safety index of gluten content not exceeding 5-10PPM, thereby being more nutritional and safer. Moreover, production efficiency is improved greatly, energy consumption and pollution discharge are reduced, and more environment friendliness and lower carbon are achieved.

A composite structure with porous metal comprises a porous metal structure and a carbon nanotube structure comprising a plurality of carbon nanotubes, the carbon nanotube structure is fixed on surface of the porous metal structure, and the porous metal structure and the carbon nanotube structure are shrunk together to form a plurality of wrinkled parts.

The invention relates to a method for preparing a wear-resistant metal-multi-element ceramic composite modified coating on the surface of titanium alloy, which belongs to the technical field of surface engineering and comprises the following steps: (1) preparing pre-alloyed powder for use; (2) using industrial alcohol Clean the surface of the substrate to be clad, and then blacken the surface of the substrate; (3) Convey the pre-alloyed powder prepared in step (1) to the substrate to be clad in step (2) through coaxial powder feeding Laser cladding was carried out on the surface of the material to prepare a wear-resistant metal-multi-element ceramic composite modified coating on the titanium alloy surface. The composite modified coating prepared by the present invention has obvious grain refinement, which achieves the purpose of fine-grain strengthening, ensures that the coating has high toughness while having high hardness, thereby greatly improving the wear resistance of titanium alloys, and further improving the performance of titanium alloys. The service life of the alloy under complex working conditions.