74results about How to "Avoid brittle break" patented technology

The invention belongs to the technical field of composite material preparation, and particularly relates to a high-strength and high-toughness ultrahigh-temperature ceramic matrix composite material and a preparation method thereof. The preparation method comprises the following steps: alternately depositing two coatings on the surface of the carbon fiber material by adopting a chemical vapor deposition method to obtain the carbon fiber material with the multilayer CVD composite coating, wherein the two coatings are one of a pyrolytic carbon layer or a layered ceramic coating and an ultrahigh-temperature ceramic coating; adopting a phenolic resin/epoxy resin solution and ceramic powder to form ceramic slurry, coating the CVD composite coating carbon fiber material with the ceramic slurry, performing alternately staggered stacking and needling to obtain a stacked fiber felt, and after vacuum drying, performing warm-pressing curing and carbonization treatment, and obtaining a porous prefabricated body; and finally, carrying out densification treatment to obtain the ceramic-based composite material. The material has high strength, high fracture toughness, oxidation resistance, ablation resistance and corrosion resistance, and can be applied to high-temperature and ultrahigh-temperature structural materials, oxidation-resistant and corrosion-resistant materials and aerospace ablation-resistant materials.

The invention discloses non-magnetic stainless steel for medical apparatuses and instruments and a manufacturing method of the non-magnetic stainless steel. The non-magnetic stainless steel is prepared from the following chemical components in percentage by weight: 0.005-0.05% of C, 0.2-1.0% of Si, 4.0-6.0% of Mn, 18.0-20.0% of Cr, 0.20-0.40% of Ag, 0.002-0.006% of O and the balance of F and unavoidable impurities; in addition, the chemical components meet the follow relational expression: Ag :Cu=0.15, Ag :(10*O) is equal to or greater than 4.5, (Nb+V): C is equal to or greater than 10.0, (Cr+Mo+1.5Si)/(Ni+30N+30C+0.25Cu+0.5Mn) is equal to or less than 1.30, Cr+3.3Mo+30N-Mn is equal to or greater than 22.0, and 580-520C-2Si-16Mn-23Ni-300N-26Cu-10Mo is equal to or lower than minus 110 DEG C. For the application requirements of non-blade medical apparatuses such as pincers in the department of orthopaedics, the hardness of the non-magnetic stainless steel can reach HV 450-505 degrees at the room temperature and meets the abrasion resistant requirement; the impact value AKV of the non-magnetic stainless steel is equal to or greater than 45 J at the room temperature and meets the tenacity requirement during clamping; the magnetic phase content of the non-magnetic stainless steel is equal to or less than 0.20% and meets the requirement of non-interference to a magnetic resonance system during an operation; and the antibiosis rate of the non-magnetic stainless steel to staphylococcus and escherichia coli is equal to or greater than 98%, so that cross infection during, before and after an operation is effectively avoided.

The invention discloses a manufacturing process for an anti-sinking fiber reinforced plastic ship. The process comprises a series of process steps of mold treatment, ship bottom pasting, ship bottom molding, ship bottom material injection, ship bottom demolding, keel mounting, keel packing, ship bottom side edge packing, ship bottom cleaning, deck mounting and ship part assembling. The ship manufactured through the process has the following advantages that firstly, a keel structure is low in weight and high in strength, the safety is improved while the weight of a ship body is lowered; secondly, corrosion of moisture to the keel structure can be resisted, and the service life is prolonged; and thirdly, due to the fact that a ship bottom and the keel structure are bound firmly through a structural adhesive, decks with foaming fillers can be used as temporary first-aid tools after the ship body is fractured and scattered and replace life rings, and persons falling into water are prevented from drowning.

The invention provides a coiling method for stainless steel dual-phase steel. The coiling method comprises the following steps: placing a roughly-rolled dual-phase steel plate blank in a coiling furnace of a fine rolling machine and carrying out fine rolling calendering to obtain dual-phase steel strip steel subjected to the fine rolling calendering; sequentially carrying out laminar cooling, coiling and water-cooling pool cooling on the dual-phase steel strip steel subjected to the fine rolling calendering; and cooling the dual-phase steel strip steel to achieve room temperature and then obtaining a dual-phase steel product, wherein the furnace temperature of the coiling furnace of the fine rolling machine is 1000-1050 DEG C, and the coiling temperature is 450-750 DEG C. The dual-phase steel plate blank comprises 2205 steel grade or 2507 steel grade, wherein the coiling temperature of the 2205 steel grade is 600-750 DEG C; and the coiling temperature of the 2507 steel grade is 450-700 DEG C.

The invention relates to a light pitched roof waterproof tile comprising a first fiber layer, a composite layer and a second fiber layer which are fixedly connected in sequence from the bottom layer to the top layer. The composite layer comprises a reinforcing layer. The first fiber layer and the second fiber layer are each prepared from basic fiber, reinforced fiber and a paper board water repellent agent. The reinforcing layer is a cotton and bast fiber layer or a glass fiber layer, a metal wire layer or a wool fabric material layer. The first fiber layer, the composite layer and the second filter layer are steeped with modified asphalt. The pitched roof waterproof tile has high strength, toughness and impact resistance, not probe to cracking or damage in the installation and using process, good in waterproof effect, not prone to color fading or losing, and capable of being decomposed, recycled and repeatedly used. The invention further relates to a preparation method of the light pitched roof waterproof tile. The preparation method comprises the steps of raw material preparation, body material manufacturing, body material shaping and body material steeping. The method is high in production efficiency, safe in production process and suitable for batch production.

The invention relates to deburring equipment of a hose surface of a glass fiber machine and a processing method of the deburring equipment of the hose surface of the glass fiber machine. The deburring equipment of the hose surface of the glass fiber machine comprises a base, a pay-off rack and a take-up rack, and is characterized in that a combusting device and a melting device are sequentially arranged between the pay-off rack and the take-up rack. The combusting device and the melting device are both arranged on the base, and are of the same height. Two ends of an inlet and an outlet of the combusting device and two ends of an inlet and an outlet of the melting device are respectively provided with a hose expanding device, and the four hose expanding devices are arranged coaxially and are matched with the height of the combusting device and the melting device. At least two air inlets are arranged inside a combusting chamber of the combusting device, and the melting device adopts non-contact heat source melting. The deburring equipment of the hose surface of the glass fiber machine and the processing method of the deburring equipment of the hose surface of the glass fiber machine are reasonable in structure, safe and energy-saving, convenient to operate and obvious in deburring effect.

The invention discloses special feed for antelopes. The special feed is prepared from raw materials in parts by weight as follows: 15-35 parts of potato powder, 2-12 parts of bean worm powder, 2-8 parts of meat and bone meal, 5-12 parts of sesame seed meal, 4-12 parts of fish meal, 1-6 parts of full-fat rice bran, 2-8 parts of high-gluten flour, 1-6 parts of sargassum, 2-6 parts of watermelon peels, 1-2 parts of potato protein powder, 0.5-1 part of beta-glucan, 2-8 parts of precipitated calcium carbonate, 0.5-2.5 parts of bentonite, 1-2 parts of choline chloride, 0.5-1.5 parts of monocalcium phosphate, 2-6 parts of glutamic acid modified gelatin, 1-2 parts of decavitamin, 0.01-0.05 parts of high-temperature-resistant phytase, 1-2 parts of soybean phospholipid oil and 1-4 parts of Chinese herbal medicines.

The invention discloses an anti-sedimentation glass fiber reinforced plastic yacht which comprises a keel structure, a deck and a hull bottom. The keel structure comprises a plurality of keels and ribs which are integrated into a framework shell, the framework shell is made of hydrophobic hard materials, a cavity is formed in the framework shell and is fully filled with hard foamed plastics, the keel structure is adhered on the inner surface of the hull bottom through structural adhesive, and the deck is fixed above the keel structure to form an anti-sedimentation hull. The hull has the advantages that the keel structure is light and high in strength, hull weight is reduced, safety is improved, corrosion of water vapor for the keel structure can be resisted, service life is prolonged, the hull bottom and the keel structure are firmly bonded through structural adhesive, scattered foamed fillers of the deck can serve as temporary first-aid tools after the hull fractures and replace life buoys, and drowning is avoided.

The invention discloses feed with a function of promoting absorption of antelopes. The feed is prepared from raw materials in parts by weight as follows: 10-16 parts of sunflower seed meal, 5-10 parts of fish meal, 6-18 parts of earthworm powder, 20-40 parts of carrot meal, 6-12 parts of oat bran, 8-14 parts of potato powder, 6-14 parts of radish leaves, 4-10 parts of water hyacinth, 8-18 parts of shrimp head powder, 9-13 parts of oyster powder, 1-2 parts of monocalcium phosphate, 2-4 parts of montmorillonite, 2-4 parts of soybean protein powder, 2-4 parts of choline chloride, 1-2 parts of glycine betaine, 2-4 parts of soybean phospholipid oil, 4-8 parts of glutamic acid modified gelatin, 0.03-0.07 parts of high-temperature-resistant phytase, 1.5-2.5 parts of multivitamins and 3-6 parts of Chinese herbal medicine. The feed is low in raw material cost and has overall and balanced nutrition, digestive absorption of the antelopes is good, the antelopes grow fast, and nutritional requirements of antelope growth can be met.