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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 3. Отображено 3.
04-04-2023 дата публикации

Nickel-chromium-aluminum/boron nitride abradable sealing coating and preparation method thereof

Номер: CN115896677A
Автор: ZHANG MOURUI, YUAN FUHE, PEI LIYAN, LIU LIXIANG, LIU LEI
Принадлежит:

The invention belongs to the technical field of coating materials, and particularly relates to a nickel-chromium-aluminum/boron nitride abradable sealing coating and a preparation method thereof. The coating comprises a bottom layer which is a plasma spraying nickel-aluminum coating playing a role in bonding a surface layer and a base body, the thickness of the coating is 0.10-0.20 mm, and the coating plays a role in bonding the surface layer and the base body; and the surface layer is a flame spraying nickel-chromium-aluminum/boron nitride coating with an abradable sealing effect, and the thickness of the coating is 2.0-3.0 mm. The preparation method of the coating comprises the steps of surface pretreatment, preparation of the nickel-aluminum bottom layer and preparation of the nickel-chromium-aluminum/boron nitride surface layer. The coating has excellent comprehensive service performance, the use temperature reaches up to 815 DEG C, and the coating is widely applied to gas compressors ...

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Номер записи: 1
23-07-2014 дата публикации

Hot stamping and warm blanking composite forming technology and mould for ultrahigh-strength steel

Номер: CN103934360A
Автор: XU HONG, ZHANG MOURUI, LYU MENGMENG, LU GUANHAN, YANG XIUCHEN, YU TING
Принадлежит:

The invention provides a hot stamping and warm blanking composite forming technology and mould for ultrahigh-strength steel. By means of the composite mould, blanking is composited in a hot stamping process, and trimming and punching are performed on sheet metal at a temperature higher than a martensite formation temperature. The hot stamping and warm blanking composite forming technology comprises the following processes of putting the sheet metal of the ultrahigh-strength steel heated to achieve complete austenitizing into the composite mould, performing stamping forming and then performing cooling and quenching; heating sheet metal needing blanking locally, keeping a warm state, performing warm blanking after completion of forming, and performing cooling further in a pressure maintaining mode. The hot stamping and warm blanking composite forming technology and mould for ultrahigh-strength steel effectively solves the problems of poor quality, low precision, high cost and long period ...

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Номер записи: 2
26-03-2014 дата публикации

Super-strength steel hot stamping die capable of carrying out rapid spotting through gas assistance

Номер: CN103658408A
Автор: LU GUANHAN, ZHANG MOURUI, GU ZHENGWEI, XU HONG, LI XIN
Принадлежит:

The invention relates to a super-strength steel hot stamping die capable of carrying out rapid spotting through gas assistance and belongs to the field of hot stamping forming. The die is mainly formed by an air cylinder (3), a male die (6), a female die (8), a fixing plate (5), an upper die plate (1), a lower die base (7) and other main parts. The male die (6) is arranged on the upper die plate (1) through the fixing plate (5). The air cylinder (3) is arranged in the fixing plate. A piston rod of the air cylinder is connected with the male die. In the stamping process, air enters to push the male die to rapidly descend through the air cylinder, a sheet metal (11) is rapidly stamped and formed, and the male die and the female die (8) rapidly carry out spotting. The super-strength steel hot stamping die mainly solves the problems that a used common hydraulic machine is too low in spotting speed, thus, the temperature of the sheet metal drops too fast, the cooling effect is uneven, and the ...

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Номер записи: 3