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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

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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Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
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Применить Всего найдено 19. Отображено 19.
04-03-2015 дата публикации

Method for eliminating machine cleaning stripes

Номер: CN104384209A
Автор: WANG LIN, YU YANG, CHEN JIN, HUI YAJUN, WANG CHANG, QING LIANG, JIAO HUILI, LIU LIBIN, CHEN BIN, LI FEI, LI SHUSEN, ZHU GUOSEN, YIN NA
Принадлежит:

The invention discloses a method for eliminating machine cleaning stripes. The method includes: performing primary oxidation on continuous casting billet in a furnace by using the tapping temperature of 1200-1300 DEG C, selecting in-furnace time of 200-220 minutes to perform secondary oxidation on the continuous casting billet to allow the loosened oxidized scale to appear at to-be-oxidized parts on the surface of the continuous casting billet, and removing the loosened oxidized scale. By the method, the defect that stripes such as flanges and pits appear on the new surface of the continuous casting billet after flame cleaning equipment is used to cut off about 3mm of the surface layer of the continuous casting billet in the prior art is overcome, the continuous casting billet with the smooth machine cleaning surface is acquired, and the method is simple, high in adaptability and evident in effect.

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Номер записи: 1
02-06-2023 дата публикации

Disc disk blade and preparation method thereof

Номер: CN116195384A
Автор: LIANG JIANGTAO, LIU KUN, DENG SUHUAI, PANG LUFENG, XIAO BAOLIANG, XU YONGXIAN, MIAO CHENGLIANG, TIAN ZHIHONG, HUANG AIJIAN, LI LEI, HUI YAJUN, LI XIAOLIN, LV BO, ZOU YING, XU CHENGLIANG, CAO RONGHUA, GUO HUIMIN, YU MENG, XU HAIWEI
Принадлежит:

The invention particularly relates to a disc harrow piece and a preparation method thereof, and belongs to the technical field of high-strength steel for agricultural machinery, the microstructure of the edge part of the disc harrow piece takes martensite as a matrix, and the microstructure of the core part of the disc harrow piece takes ferrite and pearlite as matrixes; due to the structure distribution, on one hand, the high abrasion resistance of the edge of the disc harrow blade during working is guaranteed, on the other hand, the high toughness of the core of the disc harrow blade is guaranteed, and the brittle failure or cracking phenomenon in the service process is avoided.

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Номер записи: 2
05-02-2014 дата публикации

Multiple-combustor continuous pouring dosage accurate control device

Номер: CN103557093A
Автор: WANG MING, ZHU HAOFENG, WANG QI, HUI YAJUN, ZHANG HAO, WANG JING, XUE FEI
Принадлежит:

The invention provides a multiple-combustor continuous pouring dosage accurate control device. A blanking sleeve is positioned at the center of a pouring cylinder upper cover, the upper portion of the blanking sleeve is installed in a transition section of the pouring cylinder upper cover, and the lower portion of the blanking sleeve is positioned in a pouring tank. A receiver assembly is positioned below the blanking sleeve and connected with a rotary support through a connection rod in the receiver assembly. A supporting plate is fixed on the inner wall of a pouring tank body, and the rotary support is arranged on the upper surface of the supporting plate. A rotary air cylinder is fixed on the lower surface of the supporting plate through bolts, and the output shaft of the rotary air cylinder penetrates through the lower surface of the supporting plate. By means of accurate control, the multiple-combustor continuous pouring dosage accurate control device solves the problem that in the ...

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Номер записи: 3
22-04-2015 дата публикации

Method for producing steel for pipe fittings and steel for pipe fittings

Номер: CN104532127A
Автор: PAN HUI, LI FEI, ZHU GUOSEN, ZHOU NA, LIU GUOLIANG, WANG LUN, BAO CHUNLIN, WU KEMIN, HUI YAJUN
Принадлежит:

The invention relates to the technical field of steelmaking and discloses a method for producing steel for pipe fittings and steel for the pipe fittings. The method comprises the following steps: smelting in a converter or an electric furnace, refining in an LF (ladle furnace) or RH vacuum treatment process, continuous casting, heating, rough rolling, finishing rolling, laminar cooling process and coiling, wherein the following process parameters are controlled: during the continuous casting process, the superheat range is 20-35 DEG C, the casting speed is controlled at the range of 0. 9-1.1/min and strong cooling and large reduction are adopted in the solidification tail end; during the continuous casting process, a secondary cooling schedule is adopted for control and a cooling schedule in which the cooling speed of the front section is higher than that of the rear section in the secondary cooling section is adopted; during the heating process, a slab is heated to 1200-1240 DEG C in the ...

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Номер записи: 4
28-01-2015 дата публикации

Method for improving elongation rate of high-surface-grade IF steel (Interstitial-Free Steel)

Номер: CN104307911A
Автор: WANG LIN, YU YANG, ZHANG DONG, WANG CHANG, JIAO HUILI, CHEN JIN, HUI YAJUN, LIU LIBIN, LI FEI, LI SHUSEN
Принадлежит:

A provided method for improving the elongation rate of high-surface-grade IF steel (Interstitial-Free Steel) comprises the following control key points: (1) controlling the slab discharging temperature to be 1200 +/- 20 DEG C; (2) employing a high temperature of 730-750 DEG C for reeling; (3) employing a manner of intermittent normal water supply and reducing water supply modes during steel rolling as a vertical-roll water supply system at a rough rolling stage, so as to reduce temperature reduction of strip steel edge parts; (4) optimizing vertical-roll path width-reduction-amount distribution at the rough rolling stage, employing a first, a third and a fifth paths for width reduction, wherein the width reduction amount of the first, the third and the fifth paths is 15-10 mm, 10-5 mm and 5-0 mm; and (5) performing chamfering processing on the slab. The advantages comprise that the method is simple, economic and efficient, conventional equipment can be used for improving the elongation ...

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Номер записи: 5
02-06-2023 дата публикации

High-strength and high-fatigue-performance steel plate and preparation method thereof

Номер: CN116200666A
Автор: LIANG JIANGTAO, LI YUE, LIU KUN, ZHU GUOSEN, TIAN ZHIHONG, DENG SUHUAI, LIU SHUNMING, XIAO BAOLIANG, MIAO CHENGLIANG, LI XIAOLIN, HUI YAJUN, HEO BI-BEOM, CAO RONGHUA, YU MENG, XU HAIWEI
Принадлежит:

The invention particularly relates to a high-strength and high-fatigue-performance steel plate and a preparation method thereof, and belongs to the technical field of steel preparation, relatively simple component design is adopted, C, Si, Mn, Cr, Nb, Ti and other conventional alloy elements are adopted, Cr, Mo and other elements are added, the hardenability of the material is guaranteed, more hard phases are obtained, and the strength is guaranteed; the low-carbon component design is adopted, and elements such as Nb and V are added, so that refined grains of the material are obtained, and the yield strength and fatigue strength of the material are guaranteed; by adding Cu, Ni and other elements, the corrosion resistance of the steel plate is guaranteed, the yield strength of the finished steel plate is 900-950 MPa, the tensile strength is 950-1050 MPa, the percentage elongation after fracture is 3-6%, the yield ratio is larger than or equal to 0.9, the fatigue strength is larger than or ...

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Номер записи: 6
28-07-2023 дата публикации

700MPa-grade hot-rolled high-strength high-weathering-resistant steel as well as preparation method and application thereof

Номер: CN116497280A
Автор: LIU KUN, ZHANG XU, JIANG SHAN, YUAN YUAN, NIU TAO, PANG LUFENG, BAI FENGXIA, HUANG TIANHUA, LIANG JIANGTAO, HAN YUN, TIAN ZHIHONG, XU YONGXIAN, LI FEI, XU HAIWEI, WANG LUN, HUI YAJUN, WANG XUEQIANG, YU MENG, MIAO CHENGLIANG, ZHU GUOSEN, AN RUIDONG, LI RUI, LI YUE, GUO HUIMIN, LI YONGLIN
Принадлежит:

The invention relates to the field of weathering resistant steel materials, in particular to 700MPa-grade hot-rolled high-strength high-weathering resistant steel as well as a preparation method and application thereof. The hot-rolled steel with high strength and high weathering resistance comprises the following chemical components in percentage by mass: 0.043 percent to 0.048 percent of C, 0.51 percent to 0.59 percent of Si, 0.61 percent to 0.68 percent of Mn, 0.041 percent to 0.049 percent of P, 0.0031 percent to 0.0038 percent of S, 0.071 percent to 0.079 percent of Al, 0.092 percent to 0.099 percent of Ti, 0.251 percent to 0.259 percent of Cu, 1.81 percent to 1.98 percent of Cr, 0.0031 percent to 0.0034 percent of N and the balance of Fe and inevitable impurities. The microalloying design with low C content, low Mn content and high Ti content is adopted, the overall strength of the high-weathering-resistant steel is improved, the deformation resistance in the rolling process is reduced ...

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Номер записи: 7
24-12-2014 дата публикации

Production method for reducing non-weld joint strip breakage occurrence rate during cold rolling process

Номер: CN104226693A
Автор: WANG CHANG, YU YANG, XU HAIWEI, CHANG AN, LIU LIBIN, CHEN JIN, ZHANG DONG, WANG LIN, JIAO HUILI, LI FEI, LI SHUSEN, HUI YAJUN
Принадлежит:

The invention provides a production method for reducing non-weld joint strip breakage occurrence rate during a cold rolling process. The control in production is as followed: (1) controlling the convexity and the wedge shape of a hot rolling raw material plate; (2) controlling the width of hot rolling coil incoming materials; (3) setting a surface inspection system and a fault warning system after acid pickling; (4) increasing the length of cutting the head and tail of raw materials at an inlet; (5) controlling the tension fluctuation range of the operation side and the transmission side in cold rolling; (6) controlling the highest speed of an outlet of a rolling mill. According to the production method for reducing the non-weld joint strip breakage occurrence rate during the cold rolling process, the non-weld joint strip breakage occurrence rate can be easily reduced without affecting production and cold rolling performance.

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Номер записи: 8
01-07-2015 дата публикации

Method for eliminating strapping steel hot rolling flat roll defect

Номер: CN104745784A
Автор: WANG LIN, YU YANG, WANG CHANG, WU QIAOLING, CHEN JIN, LIU YANGCHUN, CHEN BIN, LI FEI, LI SHUSEN, SUN CHAOFAN, WANG XIAOPEI, HUI YAJUN
Принадлежит:

The invention discloses a method for eliminating a strapping steel hot rolling flat roll defect, and relates to the technical field of steel rolling. The method comprises the following steps: a strapping steel phase change critical temperature point is obtained; a strip steel coiling temperature is controlled; a leveled cooling mode is controlled; and coiling tension is improved. With the method provided by the invention, a hot-rolled strapping steel offline flat roll problem can be solved.

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Номер записи: 9
09-06-2023 дата публикации

Method for avoiding cracking of high-speed brazed double-layer welded pipe in subsequent use

Номер: CN116237604A
Автор: ZHANG ZHIMIN, LIU GUANGHUI, LIU SHUNMING, LIU ZAIWANG, LUO YANZHAO, YANG LIBIN, LONG JIAMING, XIONG AIMING, TENG HUAXIANG, HAN YUN, XU HAIWEI, YU MENG, CAO RONGHUA, HUI YAJUN, LIANG XUAN
Принадлежит:

The invention provides a method for avoiding subsequent use cracking of a high-speed brazed double-layer welded pipe, which comprises the following steps: by controlling the brazing temperature, the brazing time and the cooling speed in the brazing process of the double-layer welded pipe, the obtained double-layer welded pipe has no Widmannstatten structure, and the metallographic structure meets the following conditions: (1) n is greater than N/0.7 * 20, in the formula, n represents the number of crystal grains penetrating through the whole wall thickness of the double-layer welded pipe, and n represents the number of crystal grains penetrating through the whole wall thickness of the double-layer welded pipe; n represents the wall thickness of the double-layer welded pipe; (2) the diameter of the crystal grains is less than 35 microns; and (3) the total area of the large crystal grains and the small crystal grains is smaller than 20% of the total area of the metallographic structure of ...

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Номер записи: 10
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: 11
24-12-2014 дата публикации

Method for solving surface color difference defect of hot-rolled pickled plates

Номер: CN104226683A
Автор: YU YANG, GUO ZIFENG, WANG CHANG, WANG LIN, CHEN JIN, GUAN JIANDONG, LI FEI, HUI YAJUN, FENG JUN, JIAO HUILI, LI SHUSEN
Принадлежит:

The invention discloses a method for solving the surface color difference defect of hot-rolled pickled plates, which includes the following steps: after being heated, a slab is taken out of a furnace under low temperature, and the output temperature is controlled at 1200 plus or minus 20 DEG C; after the heated slab is roughly rolled and roughly descaled, an intermediate slab is obtained; after the intermediate slab is finish-rolled and finely descaled, a finished product is obtained. By controlling the temperature parameter in the hot rolling process and improving process parameters such as choice of finishing mill rollers, the method for solving the surface color difference defect of hot-rolled pickled plates, which is provided by the invention, effectively decreases the occurrence rate of the color difference defect of hot-rolled pickled plates, thus increasing the surface quality of strip steel, the method is simple and highly applicable, the effect is remarkable, and great economic ...

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Номер записи: 12
01-08-2023 дата публикации

Hot-rolled high-strength high-weathering-resistant steel and preparation method and application thereof

Номер: CN116516254A
Автор: LIU KUN, ZHANG XU, JIANG SHAN, TIAN ZHIHONG, CHEN BIN, PANG LUFENG, HUANG TIANHUA, HUI YAJUN, HARAZONO, XU YONGXIAN, WANG XUEQIANG, HAN YUN, NIU TAO, XU HAIWEI, YU MENG, MIAO CHENGLIANG, WANG LUN, LI FEI, AN RUIDONG, LI RUI, LI YUE, BAI FENGXIA, ZHU GUOSEN, LI YONGLIN
Принадлежит:

The invention relates to the field of weathering resistant steel materials, in particular to hot-rolled high-strength high-weathering resistant steel and a preparation method and application thereof. The hot-rolled steel with high strength and high weathering resistance comprises the following chemical components in percentage by mass: 0.043% to 0.048% of C, 0.51% to 0.59% of Si, 0.61% to 0.68% of Mn, 0.101% to 0.109% of P, 0.0031% to 0.0038% of S, 0.071% to 0.079% of Al, 0.062% to 0.067% of Ti, 0.251% to 0.259% of Cu, 0.84% to 0.89% of Cr, 0.0031% to 0.0034% of N and the balance of Fe and inevitable impurities. The microalloying design with low C content, low Mn content and high Ti content is adopted, the overall strength of the high-weathering-resistant steel is improved, the deformation resistance in the rolling process is reduced, the rolling stability is good, composite weathering resistance design is carried out aiming at Si, P, Cu and Cr elements, the contribution of Si, P and other ...

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Номер записи: 13
12-02-2014 дата публикации

Detection tool for assembly of standard testing engine shell

Номер: CN103575179A
Автор: GUO BEI, HUI YAJUN, LIANG YANHUA, DING YANRU, WANG TAO, ZENG YONG, LIU XIN
Принадлежит:

The invention relates to a tool for detecting whether a standard testing engine shell is assembled in place or not. The detection tool for assembly of the standard testing engine shell is of a disc shape. The outer diameter of the detection tool is identical to that of the shell. The lower surface of the detection tool is a locating face matched with the engine shell. The outer edge of the locating face is provided with a locating table protruding in the axial direction. The outer diameter of the locating table is identical to the inner diameter of a spigot located on the end face of the engine shell. The locating table is of a circular annular shape. A circular groove is formed in the center of the locating face of the detection tool. The diameter of the groove is identical to the outer diameter of a straight-barrel section of a mandrel. A through hole is formed in the center of the circular groove in the lower surface of the detection tool. The through hole is matched with a locating ...

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Номер записи: 14
20-08-2014 дата публикации

Detection apparatus and method for hot rolling Parsytec surface detection system checkered plate bean damage defect

Номер: CN103994999A
Автор: YU YANG, JIAO HUILI, XU WENJUN, ZHANG JIAQI, YIN YUJING, WANG CHANG, WANG LIN, XU HAIWEI, CHEN JIN, HUI YAJUN, LI FEI, CHEN BIN
Принадлежит:

The present invention discloses a detection apparatus and a method for hot rolling Parsytec surface detection system checkered plate bean damage defect, and belongs to the technical field of hot rolling strip steel surface detection. The detection method comprises: 1, configuring a file to increase a checkered plate material set; 2, applying a standard edge portion detection module; 3, setting the detection sensitivity of the traditional hot rolling special area detection module to 0%, and setting the texture fitness to 100%; 4, adopting a sensitive area detection module; 5, collecting 30-50 matrix samples from a normal checkered base plate, and collecting 50-80 defect samples from a sample having bean damage defect; and 6, adopting the post-processing file setting of the system software program to make the system have the operation interface alarm function on the checkered plate bean damage defect. With the detection method, the system defect overflow can not be caused, and the batch quality ...

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Номер записи: 15
15-06-2023 дата публикации

700 mpa grade hot-formed axle housing steel and preparation method therefor

Номер: AU2021348595A2
Автор: BaoLiang XIAO, Bin Chen, Dawei Zhang, Fei Li, Guosen ZHU, Hui Pan, KeMin WU, Kun Liu, Na Zhou, QiuHan LI, Quanli Wang, Songtao WANG, Tao Niu, Tianhua Huang, Xiaolin Li, YaJun HUI, Yun Han, Zhihong Tian
Принадлежит: Beijing Shougang Co Ltd, Shougang Group Co Ltd

The present disclosure discloses a 700 MPa grade hot-formed axle housing steel, the mass fractions of chemical components of which are: C: 0.17% to 0.27%, Si: 0.30% to 0.50%, Mn: 1.2% to 1.8%, P: ≤0.02% , S: ≤0.009%, Ti: ≤0.1%, and Cr: ≤0.2%, the balance being Fe and unavoidable impurities, among which the mass fractions of Si and Mn satisfy 0.23 ≤ Si/Mn ≤ 0.27. The present disclosure further discloses a preparation method therefor, comprising: using the above chemical components to carry out smelting, continuous casting, heating, roughing and finishing, and coiling and processing, during which the heating temperature is 1180°C to 1220°C, and the heating time is 150 min to 200 min, to obtain the 700 MPa grade hot-formed axle housing steel. The steel has excellent mechanical properties before and after heat treatment, and the plate has no obvious micro-banded structures after the heat treatment and has excellent impact toughness.

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Номер записи: 16
18-05-2023 дата публикации

700 mpa grade hot-formed axle housing steel and preparation method therefor

Номер: AU2021348595A1
Автор: BaoLiang XIAO, Bin Chen, Dawei Zhang, Fei Li, Guosen ZHU, Hui Pan, KeMin WU, Kun Liu, Na Zhou, QiuHan LI, Quanli Wang, Songtao WANG, Tao Niu, Tianhua Huang, Xiaolin Li, YaJun HUI, Yun Han, Zhihong Tian
Принадлежит: Beijing Shougang Co Ltd, Shougang Group Co Ltd

The present disclosure discloses a 700 MPa grade hot-formed axle housing steel, the mass fractions of chemical components of which are: C: 0.17% to 0.27%, Si: 0.30% to 0.50%, Mn: 1.2% to 1.8%, P: ≤0.02% , S: ≤0.009%, Ti: ≤0.1%, and Cr: ≤0.2%, the balance being Fe and unavoidable impurities, among which the mass fractions of Si and Mn satisfy 0.23 ≤ Si/Mn ≤ 0.27. The present disclosure further discloses a preparation method therefor, comprising: using the above chemical components to carry out smelting, continuous casting, heating, roughing and finishing, and coiling and processing, during which the heating temperature is 1180°C to 1220°C, and the heating time is 150 min to 200 min, to obtain the 700 MPa grade hot-formed axle housing steel. The steel has excellent mechanical properties before and after heat treatment, and the plate has no obvious micro-banded structures after the heat treatment and has excellent impact toughness.

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Номер записи: 17
19-09-2024 дата публикации

700 mpa grade hot-formed axle housing steel and preparation method therefor

Номер: AU2021348595B2
Автор: BaoLiang XIAO, Bin Chen, Dawei Zhang, Fei Li, Guosen ZHU, Hui Pan, KeMin WU, Kun Liu, Na Zhou, QiuHan LI, Quanli Wang, Songtao WANG, Tao Niu, Tianhua Huang, Xiaolin Li, YaJun HUI, Yun Han, Zhihong Tian
Принадлежит: Beijing Shougang Co Ltd, Shougang Group Co Ltd

The present disclosure discloses a 700 MPa grade hot-formed axle housing steel, the mass fractions of chemical components of which are: C: 0.17% to 0.27%, Si: 0.30% to 0.50%, Mn: 1.2% to 1.8%, P: ≤0.02% , S: ≤0.009%, Ti: ≤0.1%, and Cr: ≤0.2%, the balance being Fe and unavoidable impurities, among which the mass fractions of Si and Mn satisfy 0.23 ≤ Si/Mn ≤ 0.27. The present disclosure further discloses a preparation method therefor, comprising: using the above chemical components to carry out smelting, continuous casting, heating, roughing and finishing, and coiling and processing, during which the heating temperature is 1180°C to 1220°C, and the heating time is 150 min to 200 min, to obtain the 700 MPa grade hot-formed axle housing steel. The steel has excellent mechanical properties before and after heat treatment, and the plate has no obvious micro-banded structures after the heat treatment and has excellent impact toughness.

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Номер записи: 18
03-10-2024 дата публикации

700 mpa grade hot-formed axle housing steel and preparation method therefor

Номер: AU2021348595A9
Автор: BaoLiang XIAO, Bin Chen, Dawei Zhang, Fei Li, Guosen ZHU, Hui Pan, KeMin WU, Kun Liu, Na Zhou, QiuHan LI, Quanli Wang, Songtao WANG, Tao Niu, Tianhua Huang, Xiaolin Li, YaJun HUI, Yun Han, Zhihong Tian
Принадлежит: Beijing Shougang Co Ltd, Shougang Group Co Ltd

The present disclosure discloses a 700 MPa grade hot-formed axle housing steel, the mass fractions of chemical components of which are: C: 0.17% to 0.27%, Si: 0.30% to 0.50%, Mn: 1.2% to 1.8%, P: ≤0.02% , S: ≤0.009%, Ti: ≤0.1%, and Cr: ≤0.2%, the balance being Fe and unavoidable impurities, among which the mass fractions of Si and Mn satisfy 0.23 ≤ Si/Mn ≤ 0.27. The present disclosure further discloses a preparation method therefor, comprising: using the above chemical components to carry out smelting, continuous casting, heating, roughing and finishing, and coiling and processing, during which the heating temperature is 1180°C to 1220°C, and the heating time is 150 min to 200 min, to obtain the 700 MPa grade hot-formed axle housing steel. The steel has excellent mechanical properties before and after heat treatment, and the plate has no obvious micro-banded structures after the heat treatment and has excellent impact toughness.

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Номер записи: 19