CN101864538A - Nickel-free weather-resistant steel and method for preparing hot rolled plate thereof - Google Patents
Nickel-free weather-resistant steel and method for preparing hot rolled plate thereof Download PDFInfo
- Publication number
- CN101864538A CN101864538A CN200910030576A CN200910030576A CN101864538A CN 101864538 A CN101864538 A CN 101864538A CN 200910030576 A CN200910030576 A CN 200910030576A CN 200910030576 A CN200910030576 A CN 200910030576A CN 101864538 A CN101864538 A CN 101864538A
- Authority
- CN
- China
- Prior art keywords
- nickel
- resistant steel
- weather
- free weather
- steel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Heat Treatment Of Steel (AREA)
Abstract
The invention provides nickel-free weather-resistant steel and a method for preparing a hot rolled plate thereof, and mainly solves the technical problems of high cold crack index, not very good welding performance and the like due to high C, Si and Mn content of the conventional nickel-free weather-resistant steel. The technical scheme is that: the weather-resistant steel comprises the following alloying ingredients in percentage by weight: 0.05 to 0.10 percent of C, 0.35 to 0.50 percent of Si, 0.38 and 0.50 percent of Mn, 0.07 to 0.11 percent of P, less than 0.010 percent of S, 0.45 to 0.60 percent of Cr, 0.25 to 0.45 percent of Cu, 0 to 50ppm of B, and the balance of Fe. The nickel-free weather-resistant steel of the invention is mainly used for replacing high-grade 09CuPCrNi weather-resistant steel.
Description
Technical field:
The invention belongs to the weathering steel technical field, be specifically related to a kind of nickel-free weather-resistant steel and latten manufacturing technology thereof with excellent mechanical performances, impact property, welding property and over-all properties such as corrosion-resistant.
Background technology:
At present, existing a plurality of both at home and abroad patent of invention reports about weathering steel.The composition mentality of designing mainly adopts two lines except that adding the Cu can improve corrosion resistance nature, P element.Precious metal alloys elements such as a kind of interpolation Cr, Ni, V, Ti, wherein, the Cr element can improve mechanics and corrosion resistance nature, the Ni element is except that improving corrosion resistance nature, can also effectively suppress the copper Yin Gaowen selective oxidation (iron in the selective oxidation steel, and copper is not oxidized), stop in the slab rolling process under the iron scale liquid phase copper of enrichment along crystal boundary to the matrix internal penetration, cause steel slab surface and limit portion defective and cracking to occur.For example, the highest container plate of domestic market occupation rate steel 09CuPCrNi, composition are cupric about 0.30%, nickeliferous about 0.25%.But along with precious metal price volalilitys such as international nickel, such steel production cost is higher.
Another kind of design route is to prepare economy type weathering-resistant steel by increasing low-cost alloying element replacement precious metal element.Chinese patent 85108118 has proposed a kind of Weather-resistant low alloy steel, adds the mechanical property that 0.04-0.08%V and 0.05-0.10%Re replace Ni, Cr element raising material.But the removal meeting of Cr element obviously reduces the corrosion resistance nature of material, compares with the present invention, can not be applied to ocean etc. and use the manufacturing of product down than strong corrosive environment, and add V, the Re element makes its price still higher.Another Chinese patent 200510045624.6 more approaching with patent of the present invention provides a kind of economy type weathering-resistant steel, after alloying constituent is removed Cr, Ni, to the best low-cost alloying element cu of weather resistance, P content also respective limits 0.1～0.4%Cu and＜0.034%P, be lower than Cu of the present invention, P constituent content, by increasing more C, Si, Mn element to improve the corrosion resistance nature of material, composition range 0.12-0.21%C; 0.2-2.0%Si; 0.7-2.0%Mn.But, the too much interpolation of alloying element still can cause the increase of cost on the one hand, adding more Si element on the other hand in the slab can cause the steel plate iron scale to be difficult to remove, the C of material, Si, Mn content are higher, can cause the cold crack index higher, welding property is not fine, and reduce or remove Cu, P, the Cr element also has bad influence to the corrosion resistance nature of slab.In addition, such patent does not all relate to the hot-short method that causes surperficial check crack that overcomes copper in the domestic and international actual production in the ubiquitous no nickel Copper Bearing Steel course of hot rolling, and particularly when producing latten, because the slab deformation size is bigger, this phenomenon is the most outstanding.
Summary of the invention:
The purpose of this invention is to provide a kind of low-cost nickel-free weather-resistant steel and latten preparation method thereof.It is higher mainly to solve C, Si, Mn content that existing nickel-free weather-resistant steel exists, can cause the cold crack index higher, and welding property is not a technical problem such as fine.
The technical solution adopted for the present invention to solve the technical problems is:
1) composition design: the alloying constituent of this weathering steel and weight percentage content are: C:0.05-0.10%, Si:0.35-0.50%, Mn:0.38-0.50%, P:0.07-0.11%, S:＜0.010%, Cr:0.45-0.60%, Cu:0.25-0.45%, B:0-50ppm, all the other are Fe.
Further be anti-copper pyrogenicity crack performance, corrosion resistance nature, welding property and comprehensive mechanical property by the optimization and improvement weathering steel of Si, C, S, B elemental composition scope.Wherein, C, S element interpolation scope are lower than 09CuPCrNi, and the interpolation scope of Si element is controlled at the upper limit of 09CuPCrNi composition range, has increased micro-B element.
2) the present invention also provides a kind of manufacture method that latten is produced that is used for: get the raw materials ready, carry out then converter or electrosmelting, external refining, casting, slab reheat, controlled rolling, controlled chilling by said ratio, slab adopts three sections heating processes in process furnace, first section: the preheating section board briquette preheats 1000～1050 ℃; Second section: the heating zone furnace gas temperature is set 1250～1300 ℃, makes board briquette fast by 1100～1200 ℃ of copper pyrogenicity crackle sensitive temperatures; The 3rd section: the soaking zone furnace gas temperature is set at 1200～1220 ℃, reduces tapping temperature, and slab can be reduced to rapidly below the copper pyrogenicity crackle sensitive temperature in temperature on the rolling line.
Further be that preheating section need guarantee that the slab preheating temperature reaches 1000 ℃; Heating zone need guarantee that board briquette can be rapidly above 1200 ℃; Soaking zone need guarantee that the slab tapping temperature is lower than 1220 ℃, and steel slab surface and the heart portion temperature difference are less than 20 ℃.
3) require control roughing first reduction in pass all to increase descaling process less than before and after 12%, the first passage roughing, the de-scaling water pressure need reach 18MPa～25MPa.The rich copper liquid phase of avoiding forming on the one hand under the first passage small deformation draught condition helps the fragmentation of iron scale and thorough de-scaling subsequently simultaneously to the intravital infiltration of base.
The mechanism that relates to is as follows:
Improve the corrosion resistance nature aspect: Si helps refinement rusty scale tissue, reduces the erosion rate of steel integral body; S can form sulfide inclusion, easily forms pitting propagation in the corrosion process, and corrosive nature is had disadvantageous effect; C content is crossed and can be caused forming in the alloy the relatively poor perlite of the relative ferrite of more corrosion resistance nature, the corrosion speed of accelerated material at most; P improves one of the most effective alloying element of steel atmospheric corrosion resistance, and general P content when P and Cu unite in the adding steel, can demonstrate better complex effect 0.08%～0.15% o'clock solidity to corrosion the best.
Overcome that copper causes surface heat crackle aspect in the course of hot rolling, studies show that, 1100-1200 ℃ is the sensitive temperature of Copper Bearing Steel copper pyrogenicity crackle, be below or above this temperature heating, zone of oxidation and the copper enrichment of basal body interface place will obviously reduce, therefore, by optimizing heating process and the rolling temperature control of slab in process furnace, make slab heating temperature can reduce the enrichment of the material surface of copper rapidly by copper pyrogenicity crackle sensitive temperature.In addition, research also shows, element such as B, Si helps suppressing Copper Bearing Steel surface heat crackle, and elements such as C, N are unfavorable for suppressing the research of surface heat crackle, add single certain alloying element but be mostly to adopt in research process, the present invention adopts multiple elemental composition to unite and adjusts and improves product surface quality.
Adopt the present invention to have the following advantages and effect: the present invention does not add the precious metal nickel element, does not increase other alloying element yet, adopts lower C, Si, the design of Mn composition.Compare with the high-grade weathering steel of 09CuPCrNi, do not reduce Cu, P, the Cr constituent content that helps corrosion resistance nature, go behind the nickel under the prerequisite that does not improve the production technique cost, only the control of optimal control by alloying constituent and slab manufacturing process improves the corrosive nature and the surface quality of nickel-free weather-resistant steel latten.The comprehensive mechanics of product, welding, corrosion resistance nature can substitute the high-grade weathering steel of 09CuPCrNi fully, and cost significantly reduces.The present invention can satisfy domestic most steel mill actual production conditions, need not change hot rolling line equipment and directly use.And can be used for producing the multi-assortment production such as tubing, sheet material of different diameter, thickness.
Description of drawings
Fig. 1 the present invention soaks after 0.5 hour in 3.5wt.%NaCl solution and measures polarization curve
Fig. 2 the present invention soaks after 10 days in 3.5wt.%NaCl solution and measures polarization curve
Embodiment
The chemical ingredients of the present invention and comparative example is as shown in table 1:
The chemical ingredients of table 1 the present invention and comparative example (wt%)
Each alloying constituent (wt%) of table 2 embodiment of the invention and comparative example
The preparation method of described low-cost weathering steel adopts electric furnace or the conventional smelting of converter, controls the content and the heating process of crucial alloying element.From the actual rolling result of hot rolling, embodiment limit portion and surface quality are better, and the embodiment mechanical property is suitable with 09CuPCrNi.
Table 3 embodiment heating cycle
The mechanical property of table 4 embodiment and 09CuPCrNi
Fig. 1,2 pairs of polarization curve analytical resultss see Table 5.As can be seen, by reducing C, S element and increasing the Si element, two kinds of etching times corrosion resistance nature down is all significantly better than comparative example 09CuPTiRe among the embodiment, and corrosion speed descends near 50%, and is similar substantially to 09CuPCrNi, even the summary height.
The polarization curve calculation result of table 5 embodiment and comparative example
Claims (4)
1. nickel-free weather-resistant steel, it is characterized in that composition and weight percent content are: C:0.05-0.10%, Si:0.35-0.50%, Mn:0.38-0.50%, P:0.07-0.11%, S:＜0.010%, Cr:0.45-0.60%, Cu:0.25-0.45%, B:0-50ppm, N:＜0.0045%, all the other are Fe.
2. the described a kind of nickel-free weather-resistant steel latten manufacture method of claim 1, get the raw materials ready, carry out then converter or electrosmelting, external refining, casting, slab reheat, controlled rolling, controlled chilling by claim 1 proportioning, it is characterized in that adopting three sections heating processes in the process furnace, first section: the preheating section board briquette preheats 1000～1050 ℃; Second section: the heating zone temperature is set 1250～1300 ℃, makes board briquette fast by 1100～1200 ℃ of copper pyrogenicity crackle sensitive temperatures; The 3rd section: the soaking zone furnace gas temperature is set at 1200～1220 ℃.
3. a kind of nickel-free weather-resistant steel latten manufacture method according to claim 2 is characterized in that need guaranteeing that the slab tapping temperature be lower than 1220 ℃, and steel slab surface and the heart portion temperature difference are less than 20 ℃.
4. a kind of nickel-free weather-resistant steel latten manufacture method according to claim 2, roughing first reduction in pass that it is characterized in that controlled rolling is less than all increasing descaling process, de-scaling water pressure 18MPa～25MPa before and after 12%, the first passage roughing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100305761A CN101864538B (en) | 2009-04-16 | 2009-04-16 | Nickel-free weather-resistant steel and method for preparing hot rolled plate thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100305761A CN101864538B (en) | 2009-04-16 | 2009-04-16 | Nickel-free weather-resistant steel and method for preparing hot rolled plate thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101864538A true CN101864538A (en) | 2010-10-20 |
| CN101864538B CN101864538B (en) | 2012-01-11 |
Family
ID=42956456
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100305761A Active CN101864538B (en) | 2009-04-16 | 2009-04-16 | Nickel-free weather-resistant steel and method for preparing hot rolled plate thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101864538B (en) |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102127710A (en) * | 2011-04-07 | 2011-07-20 | 莱芜钢铁集团有限公司 | Chromium-free weather-resistant steel |
| CN102337470A (en) * | 2011-09-21 | 2012-02-01 | 首钢总公司 | Thin container plate and production method thereof |
| CN103878178A (en) * | 2014-03-04 | 2014-06-25 | 河北钢铁股份有限公司唐山分公司 | Method for producing ultrathin hot-rolled coils from sheet billets by continuous casting and rolling |
| CN104694713A (en) * | 2015-04-08 | 2015-06-10 | 首钢京唐钢铁联合有限责任公司 | Heating method for copper-bearing low-alloy steel |
| CN105063488A (en) * | 2015-07-30 | 2015-11-18 | 中国电力科学研究院 | Acid soil corrosion resisting steel used for grounding grid and preparing method of acid soil corrosion resisting steel |
| CN105220063A (en) * | 2014-06-24 | 2016-01-06 | 上海梅山钢铁股份有限公司 | Resistance to marine environment steel of a kind of low cost and preparation method thereof |
| CN105239007A (en) * | 2015-11-25 | 2016-01-13 | 莱芜钢铁集团有限公司 | Nickel-free high-tenacity weather-resistant steel plate and manufacturing method thereof |
| CN105436212A (en) * | 2014-09-25 | 2016-03-30 | 鞍钢股份有限公司 | Method for reducing heating gas consumption |
| CN106893950A (en) * | 2017-01-13 | 2017-06-27 | 唐山钢铁集团有限责任公司 | Low yield strength ratio cold rolling weather resisting steel and its production method |
| CN109234617A (en) * | 2018-09-12 | 2019-01-18 | 河钢股份有限公司承德分公司 | A kind of no nickel hot rolling thin gauge weathering steel volume and its production method |
| CN110284056A (en) * | 2019-06-17 | 2019-09-27 | 南阳汉冶特钢有限公司 | A kind of corrosion-resistant offshore platform steel plate and its production method |
| CN110527810A (en) * | 2019-08-28 | 2019-12-03 | 唐山钢铁集团有限责任公司 | A method of improving slab center toughness using De-scaling box |
| CN113234994A (en) * | 2021-04-14 | 2021-08-10 | 马鞍山钢铁股份有限公司 | Hot-rolled high-strength weather-resistant steel plate with yield strength of 600MPa and production method thereof |
| CN114807730A (en) * | 2020-12-01 | 2022-07-29 | 广西柳州钢铁集团有限公司 | Nickel-free copper-phosphorus series weather-resistant steel casting blank |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100422372C (en) * | 2005-10-10 | 2008-10-01 | 燕山大学 | Hot-rolling double-phase weather-resistant steel plate and mfg. method thereof |
| CN100455692C (en) * | 2006-12-08 | 2009-01-28 | 武汉钢铁(集团)公司 | High-strength weathering steel and method of manufacturing same |
-
2009
- 2009-04-16 CN CN2009100305761A patent/CN101864538B/en active Active
Cited By (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102127710B (en) * | 2011-04-07 | 2013-06-12 | 莱芜钢铁集团有限公司 | Chromium-free weather-resistant steel |
| CN102127710A (en) * | 2011-04-07 | 2011-07-20 | 莱芜钢铁集团有限公司 | Chromium-free weather-resistant steel |
| CN102337470A (en) * | 2011-09-21 | 2012-02-01 | 首钢总公司 | Thin container plate and production method thereof |
| CN102337470B (en) * | 2011-09-21 | 2014-04-30 | 首钢总公司 | Thin container plate and production method thereof |
| CN103878178A (en) * | 2014-03-04 | 2014-06-25 | 河北钢铁股份有限公司唐山分公司 | Method for producing ultrathin hot-rolled coils from sheet billets by continuous casting and rolling |
| CN103878178B (en) * | 2014-03-04 | 2015-12-09 | 河北钢铁股份有限公司唐山分公司 | CSP produces the method for ultrathin hot rolled coiled sheet |
| CN105220063A (en) * | 2014-06-24 | 2016-01-06 | 上海梅山钢铁股份有限公司 | Resistance to marine environment steel of a kind of low cost and preparation method thereof |
| CN105436212A (en) * | 2014-09-25 | 2016-03-30 | 鞍钢股份有限公司 | Method for reducing heating gas consumption |
| CN104694713A (en) * | 2015-04-08 | 2015-06-10 | 首钢京唐钢铁联合有限责任公司 | Heating method for copper-bearing low-alloy steel |
| CN104694713B (en) * | 2015-04-08 | 2017-03-01 | 首钢京唐钢铁联合有限责任公司 | A kind of heating means of cupric low-alloy steel |
| CN105063488A (en) * | 2015-07-30 | 2015-11-18 | 中国电力科学研究院 | Acid soil corrosion resisting steel used for grounding grid and preparing method of acid soil corrosion resisting steel |
| CN105063488B (en) * | 2015-07-30 | 2017-11-07 | 中国电力科学研究院 | It is a kind of for acid resistance soil corrosion steel of grounded screen and preparation method thereof |
| CN105239007A (en) * | 2015-11-25 | 2016-01-13 | 莱芜钢铁集团有限公司 | Nickel-free high-tenacity weather-resistant steel plate and manufacturing method thereof |
| CN105239007B (en) * | 2015-11-25 | 2018-03-23 | 山东钢铁股份有限公司 | One kind is without nickel high tenacity weather-resistant steel plate and its manufacture method |
| CN106893950A (en) * | 2017-01-13 | 2017-06-27 | 唐山钢铁集团有限责任公司 | Low yield strength ratio cold rolling weather resisting steel and its production method |
| CN109234617A (en) * | 2018-09-12 | 2019-01-18 | 河钢股份有限公司承德分公司 | A kind of no nickel hot rolling thin gauge weathering steel volume and its production method |
| CN110284056A (en) * | 2019-06-17 | 2019-09-27 | 南阳汉冶特钢有限公司 | A kind of corrosion-resistant offshore platform steel plate and its production method |
| CN110527810A (en) * | 2019-08-28 | 2019-12-03 | 唐山钢铁集团有限责任公司 | A method of improving slab center toughness using De-scaling box |
| CN110527810B (en) * | 2019-08-28 | 2021-09-07 | 唐山钢铁集团有限责任公司 | Method for improving core toughness of thick plate by utilizing descaling box |
| CN114807730A (en) * | 2020-12-01 | 2022-07-29 | 广西柳州钢铁集团有限公司 | Nickel-free copper-phosphorus series weather-resistant steel casting blank |
| CN114807730B (en) * | 2020-12-01 | 2024-02-23 | 广西柳州钢铁集团有限公司 | Nickel-free copper-phosphorus weather-resistant steel casting blank |
| CN113234994A (en) * | 2021-04-14 | 2021-08-10 | 马鞍山钢铁股份有限公司 | Hot-rolled high-strength weather-resistant steel plate with yield strength of 600MPa and production method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101864538B (en) | 2012-01-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101864538B (en) | Nickel-free weather-resistant steel and method for preparing hot rolled plate thereof | |
| CN101935809B (en) | High performance rare-earth duplex stainless steel alloy material and preparation method thereof | |
| CN101781742B (en) | Medium-thickness ship plate steel with ultrahigh intensity and low-temperature impact toughness and manufacturing method thereof | |
| CN104438418A (en) | Rolling method of stainless steel mold cast steel ingot by one-heating forming | |
| CN103667947B (en) | Without the stainless manufacturing process of nickel Austriaization body | |
| CN102330035A (en) | Heat resistant steel, and heat resistant steel pipe and manufacturing method thereof | |
| CN101328565A (en) | Low nickle type austenitic stainless steel and manufacturing method thereof | |
| CN102011047A (en) | Production method of steel plate for pressure vessel with low cost and high performance | |
| CN103966525B (en) | A kind of chromium high molybdenum high ferritic stainless steel seamless tubular goods and manufacture method thereof | |
| CN109440014B (en) | Low-chromium low-nickel duplex stainless steel and preparation method thereof | |
| CN103556047A (en) | 450MPa-grade hydrogen-induced-cracking-resistant pressure vessel steel plate and production method thereof | |
| CN102732746A (en) | Novel erosion resistant cupronickel alloy and preparation method thereof | |
| CN103205653A (en) | Duplex stainless steel with excellent thermoplasticity and corrosion resistance and manufacturing method thereof | |
| CN103589972A (en) | Low-cost low alloy steel for resistance to dew point corrosion of sulfuric acid as well as production process and application of low alloy steel | |
| CN101397637B (en) | 13Cr high anti-carbon dioxide and trace hydrogen sulfide corrosion tubing and casing steel and method for producing the same | |
| CN105154784A (en) | High-phosphorus steel plate of weather-proof structure and method for preparing steel plate | |
| CN101158007A (en) | Ferritic stainless steel and preparation method thereof | |
| CN103468905A (en) | 485MPa grade pipeline steel hot-rolled coil plate and manufacturing method thereof | |
| CN103451559A (en) | Gas valve alloy material and manufacturing method thereof | |
| CN103540859A (en) | High heat-resistant stainless steel coffee pot material and preparation method thereof | |
| CN105132822A (en) | Pipeline steel excellent in CO2 corrosion resistance and production method | |
| CN102286700B (en) | Sulfuric-acid-resistant dew point corrosion steel with tensile strength greater than or equal to 800Mpa grade and preparation method thereof | |
| CN102943220B (en) | Nickel-saving austenitic stainless steel and fabrication method thereof | |
| CN100439551C (en) | High-grade highly carbon-dioxide resistant chloride ion corrosion oil annular tube steel and method for manufacturing the same | |
| CN102650024A (en) | Medium plate made of duplex stainless steel with excellent low-temperature toughness and manufacturing method for medium plate |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |