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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 5. Отображено 5.
07-04-2023 дата публикации

Metallographic sample preparation method of alloy coating and application of metallographic sample preparation method

Номер: CN115931504A
Автор: WEN JUAN, SHI XUEXING, JU XINHUA, LAI PING, JIA HUIPING, ZHANG LIXIA, CUI GUIBIN
Принадлежит:

The invention relates to the technical field of coating analysis, in particular to a metallographic sample preparation method of an alloy coating and application of the metallographic sample preparation method. The method comprises the following steps: grinding the metallographic cross section of a plating layer to be detected for N times to obtain a first sample; polishing the first sample to obtain a metallographic sample of the alloy coating; wherein the total time length of the N times of grinding ranges from 200 s to 380 s, and the time length of the polishing ranges from 80 s to 170 s; the rotating speed of the polishing is 900 r/min to 1400 r/min; the grinding speeds of the N times of grinding are respectively 300 r/min to 500 r/min; n > = 3 and N is a positive integer; the method comprises grinding and polishing. The application comprises the steps that the method is used for preparing metallographic samples of hot galvanizing, electrogalvanizing, zinc-magnesium-aluminum and aluminum-silicon ...

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Номер записи: 1
01-08-2023 дата публикации

Hot-rolled weathering steel and production method thereof

Номер: CN116516245A
Автор: GUO JIA, LIU KUN, YU GUANGYONG, HAN YUN, TIAN ZHIHONG, JI CHENXI, LIANG JIANGTAO, CAO JIANPING, XU SHIXIN, JU XINHUA, WEN JUAN, QIN HANCHENG, CUI GUIBIN
Принадлежит:

The invention relates to the technical field of hot-rolled strip steel, in particular to hot-rolled weathering steel and a production method thereof. The weathering steel comprises the following chemical components of C, Si, Mn, P, S, Ni, Cr, Cu, Al, N, Ti and the balance Fe and inevitable impurities. The content of the Ti is 0.40 weight percent to 0.60 weight percent. Based on the weather resistance of 09CuPCrNi, the low-carbon and low-manganese component design is adopted, and on the basis that alloy elements Ni, Cr and Cu are added, a proper amount of alloy element Ti is added, and through a proper technological process, the weather resistance and the mechanical property of the weather-resistant steel are further improved. The technical problem that in the prior art, the weather resistance and the mechanical property of 09CuPCrNi weather-resistant steel cannot be considered at the same time is solved.

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Номер записи: 2
02-06-2023 дата публикации

Hot-rolled highly-expanded steel and preparation method thereof

Номер: CN116200664A
Автор: GUO JIA, GUO ZIFENG, TENG HUAXIANG, CHEN BIN, YU GUANGYONG, CAO JIANPING, XU SHIXIN, JU XINHUA, WEN JUAN, MENG YANG, CUI GUIBIN, GUO YONG, FENG CHAO
Принадлежит:

The invention relates to the technical field of hot-rolled strip steel, in particular to hot-rolled highly-expanded steel and a preparation method thereof, and the hot-rolled highly-expanded steel comprises the following chemical components: 0.05-0.08% by mass of C, 0.10-0.20% by mass of Si, 1.0-1.80% by mass of Mn, 0.05-0.15% by mass of Ti, 0.010-0.020% by mass of P, less than or equal to 0.004% by mass of S, less than or equal to 0.04% by mass of Al, less than or equal to 0.005% by mass of N, 0.2-0.4% by mass of Cr and the balance of Fe. Mo: 0.05%-0.25% by mass, Fe: 0.05%-0.25% by mass; the metallographic structure of the steel comprises ferrite and a Ti-containing precipitate. On the basis of the design components, through controlled rolling and controlled cooling, the tensile strength of the obtained hot-rolled high-hole-expansion steel ranges from 780 MPa to 850 MPa, the percentage elongation after fracture A80 is larger than or equal to 12%, compared with high-hole-expansion steel ...

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Номер записи: 3
04-06-2014 дата публикации

Method of representing microstructure of scale on section of hot-rolled steel plate by adoption of EBSD

Номер: CN103837557A
Автор: YIN LIXIN, CUI GUIBIN, REN QUN, YAN CHUNLIAN, MENG YANG, FU BAILIN, JU XINHUA, LIU WEIPING
Принадлежит:

The invention relates to a method of representing a microstructure of scale on a section of a hot-rolled steel plate by adoption of EBSD, and belongs to the technical field of physical property examination of metal materials. The phase, the orientation, the stress state, and other data of a sample, which are obtained by back scattering diffraction information formed by irradiating electron beams onto the surface of the sample, are utilized to analyze a crystalline-state material. The back scattering signals are very sensitive to the surface of the sample, and therefore the sample used for EBSD observation needs high flatness and the least stress layers as possible. The method is advantageous in that: problems of scale sample preparation difficulties, namely, easy breakage and poor conductive performance, are solved; a scale section representing problem of the hot-rolled steel plate is solved; scale crystallographic parameters are selected in subsequent EBSD surface scanning; each phase ...

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Номер записи: 4
23-06-2023 дата публикации

Weathering steel and preparation method thereof

Номер: CN116288050A
Автор: HUI YAJUN, LIU KUN, HAN YUN, NIU TAO, WU KEMIN, XU YONGXIAN, HUANG TIANHUA, PANG LUFENG, ZHANG XU, JIANG SHAN, TIAN ZHIHONG, CHEN BIN, ZHOU NA, XIAO BAOLIANG, QIU YU, HUANG XU, LIANG JIANGTAO, CUI GUIBIN, WEN JUAN, WANG SHANSHAN, LI XIAOLIN, ZHANG DAWEI, ZHANG ZHIMIN
Принадлежит:

The invention provides weathering steel, which belongs to the technical field of steel smelting and rolling and comprises the following chemical components in percentage by mass: 0.015 to 0.05 percent of Ni, 0.2 to 0.5 percent of Cu, 1.6 to 3.0 percent of Cr, less than or equal to 0.120 percent of C and the balance of Fe and inevitable impurities. When the Cu-Cr alloy is applied to products such as a photovoltaic support, a compact alpha-FeOOH oxidation rust layer can be formed on the surface of steel through matching of Cu and Cr in proportion, further corrosion of a matrix structure of the steel is prevented, and the corrosion resistance of the steel is improved; due to the addition of Ni, the copper brittleness defect formed by the addition of Cu can be inhibited; by controlling the content of C, the situation that when the content of C is high, corrosion resistance and low-temperature toughness of steel are not affected can be avoided. Therefore, the weathering resistant steel provided ...

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Номер записи: 5