前苏联专利SU1311622A3 Method for manufacturing cold-rolled zinc-plated sheet

专利PDF首页>>前苏联专利

专利附录

专利说明

权利要求

类似技术

同族专利

引用文献

法律状态

优先权

专利摘要:
The invention relates to a method for producing coated high strength low alloy steel. A strip of steel is cleaned from rolling oil, is heated to the temperature range A1 to A3 in a protective atmosphere, is soaked and subsequently quenched in a zinc-aluminum bath for a short time sufficient to adhere a zinc coating to the steel surface, whereafter the steel strip is rapidly cooled to a temperature below 300 DEG C., to obtain a dual-phase steel structure.
公开号:SU1311622A3
申请号:SU823442803
申请日:1982-05-25
公开日:1987-05-15
发明作者:Юхани Сиппола Пертти
申请人:Ра-Шиппинг Лтд,Ой (Фирма)；
IPC主号:

专利说明:

This invention relates to ferrous metallurgy, in particular to the manufacture of cold rolled sheet with an anti-corrosion coating.
The aim of the invention is to increase the strength of the sheet while maintaining plasticity.
The essence of the invention is to use for manufacturing cold-rolled sheet low-carbon low-alloy steels, acquiring after a corresponding heat treatment a two-phase structure consisting of martensite or lower bainite and ferrite. Such a structure is obtained after heating the steel to a temperature in the range of Ac, -Ac5, holding at this temperature to form the required ratio of austenite and ferrite and the subsequent rapid cooling; to convert austenite to martensite or lower bainite.
Steel with a two-phase structure has increased strength while maintaining sufficient ductility
After cleaning the steel strip 13 from the rolling oil, the strip is heated in a furnace 2 with a protective atmosphere to the temperature range Ac, -ACz and kept in the furnace 3 for discharge for 1-2 minutes. Shielding gas contains 10–25% hydrogen and 90–75% nitrogen. In the last zone 4 of the holding furnace 3, the temperature of the steel is adjusted appropriately above the temperature of Ac before it is cooled in the zinc-aluminum bath. The bath 5 is made of ceramic and is equipped with a cooling device 6 and a heat exchanger to prevent the temperature of the 25 zinc-aluminum bath from rising due to the influence of the energy introduced by the steel strip. Screen 7 is cooled with water. Circulation of liquid metal is provided by means of a pump 8, equipped with the use of a cooling turbine from a temperature of annealing to 420-460 C using a ceramic turbine wheel as a cooling medium, a co-aluminum melt serving as a liquid metal.
for applying the anticorrosive dinko-aluminum coating, as well as the subsequent accelerated cooling of the strip to a temperature below 300 ° C, a galvanized sheet with a two-phase structure is obtained with good adhesion of the zinc coating to the steel.
Introduction of 4-6% aluminum to zinc-aluminum alloy reduces the temperature of the galvanizing bath to 400-440 C instead of 440-460 with the prototype, which allows for good bonding of the coating despite the higher temperature of galvanizing the steel strip.
The drawing shows a diagram of the unit for the manufacture of galvanized sheet by the proposed method.
The unit contains the installation 1 for cleaning the steel strip, the oil from the rolling oil, the furnace 2 for heating the steel strip to the temperature interval, the furnace 3 for the lead, the last zone 4 of which enters the zinc-aluminum bath 5 in which the cooling device 6 is placed, the screen 7 being cooled pumping device 8 for circulation
and
13116222
the melt and the guide rollers 9 for guiding the steel strip through the zinc-aluminum bath, the nozzles 10 and 11 for cooling with gas and air, and the nozzles 12 for feeding the water-air mixture.

five
The method is implemented as follows.
After cleaning the steel strip 13 from the rolling oil, the strip is heated in a furnace 2 with a protective atmosphere to the temperature range Ac, -ACz and kept in the furnace 3 for discharge for 1-2 minutes. Shielding gas contains 10–25% hydrogen and 90–75% nitrogen. In the last zone 4 of the furnace 3 for holding, the temperature of the steel is adjusted appropriately above the temperature of Ac before it is cooled in the zinc-aluminum bath. The bath 5 is made of ceramic and is equipped with a cooling device 6 and a heat exchanger to prevent the temperature of the 25 zinc-aluminum bath from rising due to the influence of the energy introduced by the steel strip. Screen 7 is cooled with water. The circulation of liquid metal is provided by a pump 8, equipped with a ceramic turbine wheel. Liquid metal flows evenly
.35
40
the surface of the strip through nozzles located on both sides of the strip and spreads across its entire width. Thanks to this, the temperature of the metal in this. the bath remains constant despite the large amount of heat energy contained in the steel strip, and at the same time the effect of the sudden cooling of liquid zinc can
regulated by liquid zinc consumption. When changing the speed of the steel strip, the galvanizing time can be kept constant due to
2 adjusting the height of the location of the guides, the rollers 9 by known methods (for example, they will be set to the desired position automatically depending on the speed
50 lanes). After the zinc bath, the thickness of the coating is controlled by the nozzles of 10 gas jets. After that, the molten coating is quickly cured with cold air jets, after which the steel strip is rapidly cooled to a lower temperature using nozzles 12 for air-all jets o, Nozzles 11 and 12 can be adjusted to different heights
fO
according to the speed of the steel strip.
According to the proposed method, the steel is rapidly cooled from the temperature in the range where the steel has an austenitic ferritic structure in a zinc-aluminum bath for the time required to form a zinc coating, after which the steel is again rapidly cooled using air and water jets to below. The total accelerated strip cooling time is 5-10 seconds.
Rapid cooling of the steel provides the necessary deposition of carbon atoms trapped by the ferritic matrix with the formation of a minimum surplus, and the production of coated, tempered and two-phase (ferrite and bekit (martensite)) high-quality steel strip, which is impossible to accomplish in a known manner from slower cooling of the steel strip in the annealing furnace before coating in the zinc bath.
The eutectic zinc-aluminum bath containing 4–6% aluminum at a low operating temperature of 400–440 ° C ensures good formation and adhesion of the coating despite the use of a high temperature strip entering the zinc bath. In the known method this is not feasible due to the low aluminum content zinc melt (less than 0.2%) and a high bath temperature (with a temperature of 450 ° C) due to the fact that the melting point of such an alloy is 420 ° C.
4 T a
blitz 2
Properties
Steel 1 I
Steel 2
20
Tensile strength
on break, MPa 643 485
Yield strength
MPa270 203
Yield Strength /
tensile strength
breaking 0.42 0.43
Relative lengthening,% 32 36
Relative de-. - formation at yield strength,% O O
25
thirty
The resulting mechanical properties are typical of two-phase steels, a characteristic feature of which is the low ratio of yield strength to tensile strength and zero strain at yield strength.

权利要求:
Claims (2)
[1]
Invention Formula
35
1. A method of manufacturing cold rolled galvanized sheet, mainly from low carbon low alloy steels, including beeks "" "Apronizing a cold rolled strip, heating According to the proposed method, from a protective atmosphere to temperature 40
A galvanized sheet of steel was prepared, the compositions of which are presented in Table 1.
Table 1
, exposure, accelerated cooling to the zinc-zinc temperature in the zinc-aluminum melt, zinc plating for coating the steel with a zinc-aluminum alloy and subsequent accelerated cooling with air and water, which are characterized by the fact that the sheet has the mechanical properties shown in Table 2. 2
4 T a
blitz 2
Properties
Steel 1 I
Steel 2
Tensile strength
on break, MPa 643 485
Yield strength
MPa270 203
Yield Strength /
tensile strength
breaking 0.42 0.43
Relative lengthening,% 32 36
Relative de-. - formation at yield strength,% O O
The resulting mechanical properties are typical of two-phase steels, a characteristic feature of which is the low ratio of yield strength to tensile strength and zero strain at yield strength.
Invention Formula
, exposure, accelerated cooling to the zinc-zinc temperature in the zinc-aluminum melt, galvanizing for coating the steel with a zinc-aluminum alloy and subsequent accelerated cooling with air and water, characterized in that, in order to improve the strength while maintaining ductility, accelerated cooling of the strip after it is heated. and at temperatures of Ac, it is produced up to 420-490 С in a zinc-aluminum melt, and after galvanizing, the strip is rapidly cooled to a temperature below ZOO With first air and then water-air a mixture of cp of obtaining a two-phase structure, steel.
[2]
2. A method according to claim 1, characterized in that the accelerated cooling of the strip in a zinc-aluminum melt is carried out with an ashomini content of 4-6%.
3, The method according to claim 1, 1 and 2, and the fact that the accelerated cooling of the strip in the zinc-aluminum section is: Ave is produced at its temperature of 400-460 ° C,
Editor A. Lezhnin
Compiled by A. Tehred L. Oleinik
Order 1907/58 Circulation 550. Subscription VNIIPI USSR State Committee
on cases of inventions and from 4sryti 113035J Moscow, F-ZZ Raushsk nab, d, 4/5
Production and printing company, Uzhgorod, st. Project, 4
Proofreader AO Ilyin

类似技术:

公开号 | 公开日 | 专利标题

SU1311622A3|1987-05-15|Method for manufacturing cold-rolled zinc-plated sheet

CN100385019C|2008-04-30|Process of production and production system of high strength galvannealed steel sheet

RU2739568C2|2020-12-25|Hot-dip galvanized aluminised steel strip with polymer coating, yield point of not less than 600 mpa and high value of relative elongation and method of its manufacturing

RU2736476C2|2020-11-17|Hot-dip galvanized aluminised steel strip with polymer coating, yield point of not less than 500 mpa and high value of relative elongation and method of its manufacturing

CN103987868B|2016-03-09|There is the ultimate tensile strength of more than 980MPa, material anisotropy few and the high-strength hot-dip galvanized steel sheet had excellent formability, high-strength and high-ductility galvannealed steel sheet and their manufacture method

CN101238233B|2012-11-28|Hot-rolled steel sheet and cold-rolled steel sheet and manufacturing method thereof

JP5720856B2|2015-05-20|Galvanized steel sheet for hot forming

JP3750789B2|2006-03-01|Hot-dip galvanized steel sheet having excellent ductility and method for producing the same

JP2010538163A|2010-12-09|Method and apparatus for controlling and oxidizing the surface of a continuously running steel strip with a radiant tube furnace for galvanizing

CN103857821A|2014-06-11|High-strength hot-dip galvanized steel sheet

CN103827335A|2014-05-28|Galvanized steel sheet and method of manufacturing same

CN101910441B|2013-04-24|High strength cold rolled steel plate and galvanized steel plate with superior workability and method for manufacturing thereof

KR20060103480A|2006-09-29|Hot dip zinc plated high strength steel sheet excellent in plating adhesiveness and hole expanding characteristics

JP3885763B2|2007-02-28|Hot-dip galvanized steel sheet for quenching, its manufacturing method and use

CN104264041A|2015-01-07|High-strength low-alloy hot-dip aluminized and galvanized steel strip and production method thereof

CA1319086C|1993-06-15|Method for producing non-aging hot-dip galvanized steel strip

JP2013142198A|2013-07-22|Method for producing hot-dip galvanized steel sheet having excellent plating wettability and pickup resistance

CN100564550C|2009-12-02|The high tensile steel plate that unit elongation and reaming are good or the producing apparatus of hot dip galvanized high strength steel sheet

CN105483535A|2016-04-13|High-strength hot-galvanized dual-phase steel and preparation method thereof

CN106715726A|2017-05-24|Method and apparatus for producing high-strength hot-dipped galvanized steel sheet

US4752508A|1988-06-21|Method for controlling the thickness of an intermetallic | layer on a steel strip in a continuous hot-dip galvanizing process

WO1980000977A1|1980-05-15|Process of producing one-side alloyed galvanized steel strip

CN109338061A|2019-02-15|A kind of production method of high corrosion-resistant continuous annealing low-alloy high-strength steel band

JP2002030403A|2002-01-31|Hot dip galvannealed steel sheet and its production method

JP3912181B2|2007-05-09|Composite structure type high-tensile hot-dip galvanized cold-rolled steel sheet excellent in deep drawability and stretch flangeability and manufacturing method thereof

同族专利:

公开号 | 公开日

CA1196557A|1985-11-12|

JPH0146564B2|1989-10-09|

IT1148941B|1986-12-03|

FR2506788B1|1986-04-11|

SE452895B|1987-12-21|

US4361448A|1982-11-30|

IT8248517D0|1982-05-26|

GB2102029B|1986-01-15|

GB2102029A|1983-01-26|

FR2506788A1|1982-12-03|

SE8203264L|1982-11-28|

JPS589968A|1983-01-20|

引用文献:

公开号 | 申请日 | 公开日 | 申请人 | 专利标题

RU2563909C1|2014-04-29|2015-09-27|Публичное акционерное общество "Северсталь" |Method of production of hot dipped galvanised roll stock of increased strength from low-alloyed steel for cold stamping|BE668442A|

US2824021A|1955-12-12|1958-02-18|Wheeling Steel Corp|Method of coating metal with molten coating metal|

FR1457621A|1964-09-23|1966-01-24|Inland Steel Co|Advanced steel sheets or strips with high mechanical resistance|

FR1534778A|1966-06-07|1968-08-02|Metallurg D Esperancelongdoz S|Continuous galvanizing process and installation|

US3782909A|1972-02-11|1974-01-01|Bethlehem Steel Corp|Corrosion resistant aluminum-zinc coating and method of making|

US3959035A|1973-10-09|1976-05-25|United States Steel Corporation|Heat treatment for minimizing crazing of hot-dip aluminum coatings|

FI51715C|1975-07-03|1977-03-10|Raimo Talikka|Method and device for simultaneous hardening and hot-dip galvanizing of iron and steel products.|

US4029478A|1976-01-05|1977-06-14|Inland Steel Company|Zn-Al hot-dip coated ferrous sheet|

JPS5922307B2|1979-09-13|1984-05-25|Aiwa Co|

JPS595649B2|1979-10-03|1984-02-06|Nippon Kokan Kk|

JPS5943975B2|1979-10-19|1984-10-25|Nippon Kokan Kk|

JPS633930B2|1980-03-10|1988-01-26|Nisshin Steel Co Ltd|

FI832460L|1983-07-05|1985-01-06|Ahlstroem Oy|FOERFARANDE FOER REGLERING AV ETT METALLSMAELTBADS TEMPERATUR.|

US4759807A|1986-12-29|1988-07-26|Rasmet Ky|Method for producing non-aging hot-dip galvanized steel strip|

US4752508A|1987-02-27|1988-06-21|Rasmet Ky|Method for controlling the thickness of an intermetalliclayer on a steel strip in a continuous hot-dip galvanizing process|

DE3713401C1|1987-04-21|1988-03-10|Korf Engineering Gmbh|Process for cooling heated material and device for carrying out the process|

AU616989B2|1988-08-24|1991-11-14|Australian Wire Industries Pty Ltd|Stabilization of jet wiped wire|

AT392488B|1989-02-07|1991-04-10|Austria Metall|METHOD FOR TREATING TAPES IN THE HOT AND COLD ROLLED CONDITION|

SE9101053L|1990-04-13|1991-10-14|Centre Rech Metallurgique|PROCEDURES FOR COATING A CONTINUOUS STEEL BAND|

US5284680A|1992-04-27|1994-02-08|Inland Steel Company|Method for producing a galvanized ultra-high strength steel strip|

BE1008792A6|1994-10-26|1996-08-06|Centre Rech Metallurgique|Accelerated cooling device substrate scroll continuous fast in a vertical plane.|

US6177140B1|1998-01-29|2001-01-23|Ispat Inland, Inc.|Method for galvanizing and galvannealing employing a bath of zinc and aluminum|

EP1008661A3|1998-12-12|2000-06-28|Sundwig GmbH|Installation for treating a continuously conveyed metal strip along a principal direction of transportation|

US20050247382A1|2004-05-06|2005-11-10|Sippola Pertti J|Process for producing a new high-strength dual-phase steel product from lightly alloyed steel|

DE102004052482A1|2004-10-28|2006-05-11|Thyssenkrupp Steel Ag|Method for producing a corrosion-protected steel sheet|

US7959747B2|2004-11-24|2011-06-14|Nucor Corporation|Method of making cold rolled dual phase steel sheet|

US8337643B2|2004-11-24|2012-12-25|Nucor Corporation|Hot rolled dual phase steel sheet|

US7442268B2|2004-11-24|2008-10-28|Nucor Corporation|Method of manufacturing cold rolled dual-phase steel sheet|

US8852475B2|2005-12-01|2014-10-07|Saint-Gobain Performance Plastics Corporation|Method of making continuous filament reinforced structural plastic profiles using pultrusion/coextrusion|

US11155902B2|2006-09-27|2021-10-26|Nucor Corporation|High strength, hot dip coated, dual phase, steel sheet and method of manufacturing same|

US7608155B2|2006-09-27|2009-10-27|Nucor Corporation|High strength, hot dip coated, dual phase, steel sheet and method of manufacturing same|

FR2913432B1|2007-03-07|2011-06-17|Siemens Vai Metals Tech Sas|METHOD AND INSTALLATION FOR CONTINUOUS DEPOSITION OF A COATING ON A TAPE SUPPORT|

CN101842509A|2007-09-10|2010-09-22|帕蒂·J·西珀拉|Method and apparatus for improved formability of galvanized steel having high tensile strength|

CA2701903C|2007-10-10|2017-02-28|Nucor Corporation|Complex metallographic structured steel and method of manufacturing same|

CN103459616B|2011-03-30|2016-03-16|塔塔钢铁荷兰科技有限责任公司|The method of thermal treatment coated metal band and heat treated coated metal band|

CN110863137B|2018-08-27|2021-05-07|上海梅山钢铁股份有限公司|Method for manufacturing hot-dip aluminum-zinc steel plate|

法律状态:

优先权:

申请号 | 申请日 | 专利标题

US06/267,659|US4361448A|1981-05-27|1981-05-27|Method for producing dual-phase and zinc-aluminum coated steels from plain low carbon steels|

[返回顶部]