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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Применить Всего найдено 2. Отображено 2.
12-05-2023 дата публикации

Manufacturing method of hypereutectic high-chromium cast iron screw

Номер: CN116099988A
Автор: XING ZHENGUO, CHANG LIANBO, XING WANLI, LIU HONGJI, WEI RUZAN, BAI HUABIN, LIU MIAOMIAO
Принадлежит:

The invention discloses a manufacturing method of a hypereutectic high-chromium cast iron screw. Comprising the following steps: (1) smelting in an intermediate frequency furnace: charging materials are high-quality scrap steel, high-purity pig iron, low-phosphorus alloyed iron alloy or industrial pure metal, and P in molten iron is less than or equal to 0.015%; reducing slag is produced in the furnace. (2) casting ladle molten iron treatment: the tapping temperature is gt; and inert gas is fed into the ladle bottom to stir molten iron, wire feeding modification inoculation treatment is adopted, S in the molten iron is smaller than or equal to 0.010%, and O in the molten iron is smaller than or equal to 25 ppm. And (3) pouring is conducted, specifically, slag stopping and fixed-point pouring are conducted on a pouring ladle on a fixed-point pouring vehicle, whole-course CO2 or N2 protection is conducted through a top cap, a pouring chute and a pouring cup cover, modification inoculation ...

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Номер записи: 1
04-07-2023 дата публикации

Flexible composite light-transmitting packaging material

Номер: CN116376024A
Автор: BAI BAOYING, LIANG GUOJUAN, BAI HUABIN, LI YUANHAI, TANG FUQIANG
Принадлежит:

The invention discloses a flexible composite light-transmitting packaging material, and relates to the technical field of packaging materials. The flexible composite light-transmitting packaging material comprises a main body material, a catalytic material and an auxiliary material, and the main body material comprises the following components: 1-4 parts of tetramethyl tetravinyl cyclotetrasiloxane and 9-36 parts of a methylphenylsiloxane ring body. According to the invention, tetramethyl tetravinyl cyclotetrasiloxane and a methylphenylsiloxane ring body are adopted as main materials, and a catalyst is prepared by mixing a tetramethylammonium hydroxide aqueous solution and a methylammonium hydroxide aqueous solution, so that the organic composite material is prepared from the mixed ring body through a one-time ring opening polymerization method; according to the present invention, the tetramethyl tetravinyl cyclotetrasiloxane and the methyl phenyl siloxane ring body are adopted as the raw ...

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Номер записи: 2