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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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Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Применить Всего найдено 8. Отображено 8.
06-06-2023 дата публикации

780MPa-grade dual-phase steel with high local formability and preparation method of 780MPa-grade dual-phase steel

Номер: CN116219284A
Автор: BU FANZHENG, GUO QIANG, WU QINGMEI, WANG SHAOXIN, WANG TING, XIAO JINGJIANG, MIAO XINLEI
Принадлежит:

The invention relates to 780MPa-grade dual-phase steel with high local formability and a preparation method thereof. The steel comprises the following chemical components in percentage by mass: 0.08%-0.12% of C, 0.45%-0.75% of Si, 1.6%-2.0% of Mn, less than or equal to 0.02% of P, less than or equal to 0.01% of S, less than or equal to 0.1% of Al, 0.1%-0.4% of Cr, 0.1%-0.4% of Mo, 0.01%-0.03% of Nb, less than or equal to 0.003% of N and the balance of Fe and inevitable impurities. The method has the advantages that low carbon is adopted to reduce the carbon content in the hard-phase martensite after phase transformation, so that the performance difference between a soft phase and a hard phase is reduced, and the strength loss caused by the reduction of the carbon content in the martensite can be made up through the volume fraction, form and distribution control of the martensite and the solid solution strengthening effect of Cr and Mo.

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Номер записи: 1
12-05-2023 дата публикации

420MPa-grade low-alloy high-strength steel with high work hardening rate and manufacturing method thereof

Номер: CN116103580A
Автор: BU FANZHENG, ZHENG LIANHUI, GUO QIANG, WU QINGMEI, MIAO XINLEI, WANG YUBIN, WANG TING, XIAO JINGJIANG
Принадлежит:

The invention relates to 420MPa-grade low-alloy high-strength steel with high work hardening rate and a manufacturing method thereof, the steel comprises the following chemical components in percentage by mass: 0.08%-0.1% of C, 0.3%-0.5% of Si, 1.5%-1.7% of Mn, less than or equal to 0.018% of P, less than or equal to 0.008% of S, 0.02%-0.05% of Al, 0.1%-0.2% of Cr, 0.045%-0.065% of Nb, 0.01%-0.03% of Ti, less than or equal to 0.006% of N, and the balance of Fe and inevitable impurities, and the Nb + Ti accounts for 0.05%-0.08%. On the basis of a C-Si-Mn system, Nb and Ti are added and matched with a small amount of Cr, the solid solution strengthening and grain refining effects of the Nb and Ti are utilized, the microstructure is regulated and controlled, the yield ratio of the steel plate is reduced, and the yield ratio of the steel plate is controlled to be 0.6-0.8.

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Номер записи: 2
06-06-2023 дата публикации

Hot galvanizing alloyed H220BD steel plate with uniform pores and low surface waviness and preparation method of hot galvanizing alloyed H220BD steel plate

Номер: CN116219323A
Автор: WU QINGMEI, MIAO XINLEI, GUO QIANG, BU FANZHENG, XIAO JINGJIANG
Принадлежит:

The invention discloses a hot-dip galvanized alloyed H220BD steel plate with uniform pores and low surface waviness and a preparation method of the hot-dip galvanized alloyed H220BD steel plate. The steel plate comprises the following chemical components in percentage by weight: 0 < C < = 0.003%, 0.04% < = Si < = 0.08%, 0.25% < = Mn < = 0.65%, 0.03% < = P < = 0.07%, 0 < S < = 0.012%, 0 < N < = 0.005%, 0.02% < = Al < = 0.08%, 0 < Cr < = 0.06%, 0.001% < = Nb < = 0.006%, 0 < Ti < = 0.01%, 0 < Ni < = 0.06%, 0 < B < = 0.0005%, wherein N * 48/14/2lt; tilt, Tilt; n * 48/14, Algt; (N-Ti * 14/48) * 27/14, 10 ppm < = C-Nb * 12/93 < = 18 ppm, and the balance Fe and inevitable impurities. According to the invention, the hot-dip galvanized alloyed bake-hardened steel plate with uniform pore structure, surface waviness Wsa of less than or equal to 0.35 mu m after 5% stamping deformation and yield strength of 220Mpa grade is obtained through the processes of effectively blending key alloy elements, accurately ...

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Номер записи: 3
26-08-2015 дата публикации

Preparation method for medium plate containing interphase-precipitated titanium carbide

Номер: CN104862461A
Автор: WANG XUEMIN, SHANG CHENGJIA, YANG SHANWU, CHEN LIN, BU FANZHENG, XU XIANGYU
Принадлежит:

The invention provides a preparation method for a medium plate containing interphase-precipitated titanium carbide. The medium plate comprises the following chemical components in percentage by mass: 0.05 to 0.15 percent of C, 0.15 to 0.40 percent of Si, 1.00 to 2.00 percent of Mn, less than 0.01 percent of P, less than 0.01 percent of S, less than 0.005 percent of N, 0.04 to 0.15 percent of Ti and the balance of Fe and inevitable impurities. According to the preparation method, an inter-phase precipitated medium steel plate with high comprehensive mechanical properties is obtained by reasonably designing the content of alloy element Ti, combining solid solution strengthening and precipitation strengthening effects of the alloy element and adopting a TMCP process and a quenching and tempering process, and has tensile strength of stronger than 600 MPa, yield strength of stronger than 500 MPa and -20 DEG C V-shaped impact energy of more than 47 J.

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Номер записи: 4
21-04-2023 дата публикации

Low-cost 590MPa-grade high-formability alloying hot galvanizing dual-phase steel plate and manufacturing method thereof

Номер: CN115992333A
Автор: GUO QIANG, BU FANZHENG, ZHANG CHANGWEI, CHEN QISHUANG, DENG JUN, WANG TING, YU YAJIE, XIAO JINGJIANG
Принадлежит:

The invention relates to a hot-dip galvanized dual-phase steel plate for automobiles, in particular to a low-cost 590MPa-grade high-formability alloyed hot-dip galvanized dual-phase steel plate and a manufacturing method thereof. The alloy comprises the following components in percentage by weight: 0.05%-0.09% of C, 0.6%-0.9% of Si, 1.3%-1.8% of Mn, less than or equal to 0.02% of P, less than or equal to 0.01% of S, 0.02%-0.06% of Al and the balance of Fe. 0.4%-0.8% of Cr, and the balance Fe and inevitable impurities. Cheap alloy element design of C, Si, Mn and Cr is adopted, and alloy elements such as Nb, Ti and Mo with high alloy cost are not added. According to the invention, the production and manufacturing cost is greatly reduced; the yield strength is 330-430 MPa, the tensile strength is 590-700 MPa, the elongation (5 # sample transverse direction) is more than 29%, n10-20/Ag is 0.17-0.24, the hole expansion rate is 48%-65%, the stamping ductility and the flanging flange and bending ...

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Номер записи: 5
01-08-2023 дата публикации

Method for predicting and evaluating overall formability and local formability of high-strength steel

Номер: CN116519464A
Автор: BU FANZHENG, MIAO XINLEI, XIA JING, GUO QIANG, WU QINGMEI, XIAO JINGJIANG
Принадлежит:

The invention discloses a method for predicting and evaluating overall formability and local formability of high-strength steel. A uniaxial tensile test is carried out, strain is uniformly distributed before the material reaches tensile strength or necking instability, the overall formability of the material is reflected, and a work hardening index n or a real uniform strain epsilon u obtained by the test is taken as an evaluation index of the overall formability; the material is subjected to strain concentration distribution from necking to instability cracking, the local formability of the material is reflected, the effective strain range with necking as the center point is about 20 mm, and the thickness-based fracture strain of a sample with a complete fracture is measured to serve as an evaluation index of the local formability. The method can well predict and evaluate the overall formability and the local formability of the advanced high-strength steel, and has the advantages of simplicity ...

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Номер записи: 6
02-09-2015 дата публикации

High-performance low-alloy medium plate and preparation method thereof

Номер: CN104878293A
Автор: WANG XUEMIN, SHANG CHENGJIA, YANG SHANWU, CHEN LIN, BU FANZHENG, XU XIANGYU
Принадлежит:

The invention relates to a high-performance low-alloy medium plate and a preparation method thereof. The high-performance low-alloy medium plate includes 0.05-0.10% of C, 0.10-0.30% of Si, 1.20-1.80% of Mn, less than or equal to 0.01% of P, less than or equal to 0.01% of S, less than 0.004% of N, 0.015-0.025% of Al, 0.025-0.049% of Ti, 0.01-0.10% of Nb, 0-0.15% of Mo, and rest of Fe and unavoidable impurity by weight. The alternate precipitation medium plate with excellent combination property is obtained through controlling rolling in a recrystallization zone, a non-recrystallization zone and an austenite/ferrite two-phase zone, the yield strength is 420 to 520 MPa, the tensile strength is 530 to 630 MPa, the elongation percentage is 30-35%, and the impact energy is more than 75 J under -20 degrees centigrade.

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Номер записи: 7
23-06-2023 дата публикации

Method for evaluating local formability of high-strength steel

Номер: CN116296790A
Автор: BU FANZHENG, XIA JING, MIAO XINLEI, GUO QIANG, WU QINGMEI, XIAO JINGJIANG, WANG TING
Принадлежит:

The invention relates to a method for evaluating local formability of high-strength steel, which comprises the following steps of: taking more than three samples along a rolling direction and a vertical rolling direction respectively, recording the gauge length thickness of the samples, and then carrying out a room-temperature tensile test; fixing the sample under a microscope to enable the fracture surface to be at the focus position of the microscope; measuring for multiple times, taking a measuring point at the thinnest part of each fracture during each measurement, and taking the minimum value in the measuring points as the minimum fracture thickness; measuring the thickness of a long part parallel length middle uniform extension part sample in the fracture sample; calculating the fracture thickness reduction rate; and averaging to obtain the final fracture thickness reduction rate of the sample in the parallel rolling direction and the vertical rolling direction. The method has the ...

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Номер записи: 8