CN101235468A - Atmospheric corrosion resisting steel with yield strength more than 400MPa - Google Patents
Atmospheric corrosion resisting steel with yield strength more than 400MPa Download PDFInfo
- Publication number
- CN101235468A CN101235468A CNA2008100469593A CN200810046959A CN101235468A CN 101235468 A CN101235468 A CN 101235468A CN A2008100469593 A CNA2008100469593 A CN A2008100469593A CN 200810046959 A CN200810046959 A CN 200810046959A CN 101235468 A CN101235468 A CN 101235468A
- Authority
- CN
- China
- Prior art keywords
- steel
- atmospheric corrosion
- yield strength
- 400mpa
- corrosion resistance
- 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.)
- Pending
Links
Landscapes
- Heat Treatment Of Steel (AREA)
Abstract
The invention provides atmospheric corrosion resistant steel whose yield strength is more than 400MPa grade aiming at the defects that the yield strength of existing atmospheric corrosion resistant steel is comparatively low and the producing cost is over high, which is composed of components with following weight percent: C 0.06-0.12 %, Si 0.25-0.55%, Mn 0.30-0.80%, P 0.07-0.12%, S<=0.020%, Cu 0.25-0.55%, Cr 0.30-0.80% and Ni 0.30-0.6%, and allowance is Fe and unavoidable impurity. The mechanical ability of the steel of the invention is excellent, the atmospheric corrosion resistant performance is comparatively strong, and the producing cost is low, which is beneficial for extending and applying.
Description
Technical field
The present invention relates to the weather resisting steel of a kind of yield strength, belong to low alloy steel and make the field greater than the 400MPa level.
Background technology
Weather resisting steel belongs to low-carbon low-alloy steel, is widely used in the engineering component manufacturing of rail vehicle, electric power pylon, bridge and long-term outdoor use.The U.S. began to develop the atmospheric corrosion resistance steel in 1913, and having developed with Cu-P-Cr-Ni is main CorTen-A steel and based on the CorTen-B steel of low P, high manganese; Europe and Japan develop on U.S. CorTen is the basis of steel, have developed a series of corresponding atmospheric corrosion resistance steel, and have obtained application widely, but are that steel is the same with CorTen, and its yield strength is the 345MPa level, and intensity rank is lower.China develops weather resisting steel since the sixties in 20th century, put forth effort on the tackling key problem of weather resisting steel the eighties and drop into batch process, enter the nineties, developed a collection of steel grade, mainly be etc. based on Cu-P, Cu-P-Cr-Ni, its yield strength is based on 295MPa and 345MPa level, and intensity rank is all lower.The development of the engineering component of the China railways vehicle manufacturing beginning of this century, electric power pylon, bridge and long-term outdoor use etc. has proposed high-intensity requirement to weathering steel.In particular for the demand for development that satisfies China Railway high speed, heavy duty, need to improve the intensity of weather resisting steel, make the reduced thickness of steel plate, alleviate car body weight, improve carrying capacity; Simultaneously, the steel plate reduced thickness makes steel have the index that higher atmospheric corrosion resistance becomes a key, guarantees the safe operating life requirement of vehicle under abominable atmosphere environment impact when improving carrying capacity to satisfy.At present, high-strength hot-rolled steel band is mainly by adding one or more alloying elements among microalloy element Nb, Ti, the V etc., cooperates suitable TMCP technology again and produces, and causes production cost too high.
Summary of the invention
It is lower to the present invention is directed to existing weather resisting steel yield strength, and the shortcoming that production cost is too high the invention provides a kind of yield strength greater than the 400MPa grade atmospheric corrosion resistant steel, and the mechanics ability of this invention is good, and atmospheric corrosion resistance is stronger, and production cost is low.
A kind of yield strength is greater than the 400MPa grade atmospheric corrosion resistant steel, the chemical ingredients of steel is by weight percentage: C 0.06～0.12%, Si 0.25～0.60%, Mn 0.30～0.80%, and P 0.07～0.12%, S≤0.020%, Cu 0.25～0.55%, Cr 0.20～1.00%, and Ni 0.20～0.60%, and surplus is balance iron and unavoidable impurities.
Main alloy element content of the present invention is based on following principle:
C improves the most economical effective alloying element of hardness of steel, but the C too high levels can significantly worsen the welding property of steel, and can promote perlitic transformation, reduces the atmospheric corrosion resistance of steel, and the C content in the steel of the present invention is designed to 0.06～0.12%.
Add an amount of Mn in the steel, not only can improve the intensity of steel, and can reduce the transformation temperature of steel by the solution strengthening of Mn, crystal grain thinning, the over-all properties of raising steel, the Mn content in the steel of the present invention is designed to 0.30～0.80%.
Alloying element Si both can improve the intensity of steel by solution strengthening, also can improve the atmospheric corrosion resistance of steel, and the Si content in the steel of the present invention is designed to 0.25～0.55%.
Cu improves the topmost alloying element of steel atmospheric corrosion resistance, and the compound interpolation of Cu, P can significantly improve the atmospheric corrosion resistance of steel.But Cu, P encourage welding crack, and when welding metal solidified, P promoted the generation of low melting point inclusion, has both easily produced heat cracking, increases the low temperature crack sensitivity again, and the ductility of weld seam and toughness are degenerated.P is relevant with C content in the steel to the deleterious effect of steel, reduces C content and makes that the total content of C and P is no more than at 0.25% o'clock in the steel, then can prevent cold short tendency.P content in the steel of the present invention is designed to 0.07～0.12%; Cu content in the steel reaches at 0.25% o'clock, can effectively improve the atmospheric corrosion resistance of steel, simultaneously, Cu can improve the intensity of steel by solution strengthening, contain the Cu amount and be not higher than at 0.55% o'clock to weldability harm not quite, the Cu content in the steel of the present invention is designed to 0.25～0.55%.
Cr, Ni are the alloying elements that improves the steel atmospheric corrosion resistance.Cu, the P that adds simultaneously in the steel, enrichment of element such as Cr, Ni are in the close metal rusty scale of matrix, formation is fine and close, adhesivity is strong, approach amorphous stable rusty scale, this kind rusty scale can hinder corrosive medium to matrix permeability, and the atmospheric corrosion resistance of steel is improved.Ni can significantly improve the low-temperature flexibility of steel, effectively stops the hot-short check crack that causes of Cu.Ni content in the steel of the present invention is designed to 0.30～0.60%; Cr content is designed to 0.30～0.80%.
S is the harmful element in the steel, the sulfide inclusion that generates not only has a strong impact on the mechanical property of steel, and the corrosion resistance nature of steel is produced serious deterioration effect, therefore should be full of the S content that reduces in the steel, make its content below 0.020%, the great difference of this and traditional weathering steel.
The present invention has the following advantages:
1) good mechanical performance of steel of the present invention, yield strength 〉=400MPa wherein, tensile strength 〉=500MPa, unit elongation 〉=30%, and good welding property, cold roll forming performance and low-temperature impact toughness are arranged;
2) atmospheric corrosion resistance of steel of the present invention is stronger;
3) do not add microalloy element Nb, Ti, V in the steel of the present invention, reduced production cost;
4) production technique of steel of the present invention is controlled easily, is easy to industrial production, therefore is beneficial to and applies.
Embodiment
The present invention be a kind of yield strength greater than the 400MPa grade atmospheric corrosion resistant steel, this steel adopts conventional production technique, concrete technical process is:
At first steel billet is heated, fully austenitizing makes the abundant solid solution of microalloy element.Heating temperature is 1180～1260 ℃.
Then divide two stages to roll,, improve austenite recrystallization temperature because microalloy element Nb obviously suppresses austenite recrystallization, so control I stage rolling start rolling temperature is controlled at 1160～1250 ℃, 1040～1180 ℃ of finish to gauges, accumulative total draft 〉=55%, refine austenite crystal grain; The II stage rolling is the controlled rolling of non-recrystallization district, start rolling temperature≤980 ℃, 720～860 ℃ of finishing temperatures, back three passages accumulative total draft 〉=45%.By the hot continuous rolling thinning microstructure, produce a large amount of dislocations, deformed belt and born of the same parents' shape substructure, the nucleation site of increase precipitated phase promotes precipitated phase to separate out.
Carry out the laminar flow cooling after rolling end, its coiling temperature is 545～665 ℃.
Embodiment 1
According to above-mentioned production technique, produce tapping 1, wherein the chemical ingredients of steel 1 sees Table 1 in 1, and the mechanical property of steel 1 sees Table 1 in 2, and the atmospheric corrosion resistance of steel 1 the results are shown in Table 1 in 3.
Embodiment 2
According to above-mentioned production technique, produce tapping 2, wherein the chemical ingredients of steel 2 sees Table 2 in 1, and the mechanical property of steel 2 sees Table 2 in 2, and the atmospheric corrosion resistance of steel 2 the results are shown in Table 2 in 3.
Embodiment 3
According to above-mentioned production technique, produce tapping 3, wherein the chemical ingredients of steel 3 sees Table 3 in 1, and the mechanical property of steel 3 sees Table 3 in 2, and the atmospheric corrosion resistance of steel 3 the results are shown in Table 3 in 3.
In order to reflect the advantage of steel resistance to atmospheric corrosion of the present invention, the resistance to atmospheric corrosion result of 1 group of comparative steel is provided in the present embodiment, see Table the comparison 1 in 3.
The chemical ingredients (Wt%) of table 1 embodiment of the invention steel
The mechanical property of table 2 embodiment of the invention steel
The atmospheric corrosion resistance result of table 3 embodiment of the invention steel and comparative steel
| Steel grade | Period 1 (720h) | Second cycle (1440h) | ||
| Steel numbering system | Corrosion rate (mm/a) | Numbering | Corrosion rate (mm/a) | |
| 09CuPCrNi | Compare 1 | 1.62 | Compare 1 | 1.64 |
| The embodiment steel | 1 | 1.54 | 1 | 1.56 |
| 2 | 1.52 | 2 | 1.55 | |
| 3 | 1.48 | 3 | 1.52 | |
Table 1 is the chemical ingredients of embodiment of the invention steel.Table 2 is the mechanical property of embodiment of the invention steel, the yield strength of embodiment of the invention steel is all greater than 400MPa as can be seen from Table 2, tensile strength is all greater than 500MPa, unit elongation is all more than or equal to 30%, cold-bending property is all qualified,-40 ℃ of summers all greater than 100J, show that its welding property is good than impact absorbing energy.The mechanics ability that goes out the embodiment steel from the general performance of table 2 energy is good.Table 3 is the atmospheric corrosion resistance result of embodiment of the invention steel and comparative steel, wherein comparative steel is 09CuPCrNi, be the correct atmospheric corrosion resistance result who measures embodiment steel and comparative steel, this experiment divides two cycles that embodiment steel and comparative steel have been carried out the measurement of atmospheric corrosion resistance rate, and the corrosion rate that the general performance of table 3 energy goes out the embodiment steel is better than comparative steel 09CuPCrNi.
Above-mentioned is detailed description for most preferred embodiment processing step of the present invention; the researchist in the technology of the present invention field can do the change of form and content aspect unsubstantiality and not depart from the scope that institute of the present invention essence is protected according to above-mentioned step; therefore, the present invention is not limited to above-mentioned concrete embodiment.
Claims (3)
1. a yield strength is greater than the weather resisting steel of 400MPa level, it is characterized in that being grouped into by the one-tenth of following weight per-cent: C 0.06～0.12%, Si 0.25～0.55%, Mn 0.30～0.80%, and P 0.07～0.12%, S≤0.020%, Cu 0.25～0.55%, Cr 0.30～0.80%, and Ni 0.30～0.60%, and surplus is Fe and unavoidable impurities.
2. a kind of yield strength according to claim 1 is greater than the weather resisting steel of 400MPa level, it is characterized in that one or more compositions form by following weight percent: C 0.06～0.10%, Si 0.30～0.45%, Mn 0.35～0.45%, and P 0.07～0.10%, S≤0.020%, Cu 0.25～0.45%, Cr 0.40～0.70%, and Ni 0.30～0.50%, and surplus is Fe and unavoidable impurities.
3. a kind of yield strength according to claim 1 is greater than the weather resisting steel of 400MPa level, it is characterized in that one or more compositions form by following weight percent: C 0.07～0.09%, Si 0.35～0.51%, Mn 0.55～0.72%, and P 0.089～0.092%, S≤0.020%, Cu 0.30～0.42%, Cr 0.42～0.68%, and Ni 0.31～0.55%, and surplus is Fe and unavoidable impurities.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100469593A CN101235468A (en) | 2008-02-28 | 2008-02-28 | Atmospheric corrosion resisting steel with yield strength more than 400MPa |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100469593A CN101235468A (en) | 2008-02-28 | 2008-02-28 | Atmospheric corrosion resisting steel with yield strength more than 400MPa |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101235468A true CN101235468A (en) | 2008-08-06 |
Family
ID=39919371
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100469593A Pending CN101235468A (en) | 2008-02-28 | 2008-02-28 | Atmospheric corrosion resisting steel with yield strength more than 400MPa |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101235468A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102260834A (en) * | 2010-05-26 | 2011-11-30 | 马鞍山钢铁股份有限公司 | H2S corrosion resistant hot rolled steel plate for oil well pipe and preparation method thereof |
| CN101397634B (en) * | 2008-09-05 | 2013-06-19 | 杭州钢铁集团公司 | Atmospheric corrosion resistant 08CrNiCu low-alloy high intensity non-annealed cold-forging steel and production process |
| CN106410651A (en) * | 2016-11-23 | 2017-02-15 | 王慧敏 | High-durability power cabinet |
| CN106978566A (en) * | 2017-04-27 | 2017-07-25 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of rail truck weather resisting steel and preparation method thereof |
| CN107630166A (en) * | 2017-09-26 | 2018-01-26 | 首钢集团有限公司 | A kind of continuous casting billet production easily special thick bridge steel plate of welding and its production method |
| CN109252091A (en) * | 2018-09-19 | 2019-01-22 | 武汉钢铁有限公司 | High tenacity high weather resistance steel and preparation method thereof |
| CN110699598A (en) * | 2019-08-20 | 2020-01-17 | 北京科技大学 | Niobium microalloyed high-strength high-weather-resistance angle steel and production process thereof |
| CN115612921A (en) * | 2022-09-02 | 2023-01-17 | 武汉钢铁有限公司 | 600 MPa-grade automobile wheel steel with good corrosion resistance and manufacturing method thereof |
-
2008
- 2008-02-28 CN CNA2008100469593A patent/CN101235468A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101397634B (en) * | 2008-09-05 | 2013-06-19 | 杭州钢铁集团公司 | Atmospheric corrosion resistant 08CrNiCu low-alloy high intensity non-annealed cold-forging steel and production process |
| CN102260834A (en) * | 2010-05-26 | 2011-11-30 | 马鞍山钢铁股份有限公司 | H2S corrosion resistant hot rolled steel plate for oil well pipe and preparation method thereof |
| CN106410651A (en) * | 2016-11-23 | 2017-02-15 | 王慧敏 | High-durability power cabinet |
| CN106978566A (en) * | 2017-04-27 | 2017-07-25 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of rail truck weather resisting steel and preparation method thereof |
| CN107630166A (en) * | 2017-09-26 | 2018-01-26 | 首钢集团有限公司 | A kind of continuous casting billet production easily special thick bridge steel plate of welding and its production method |
| CN109252091A (en) * | 2018-09-19 | 2019-01-22 | 武汉钢铁有限公司 | High tenacity high weather resistance steel and preparation method thereof |
| CN110699598A (en) * | 2019-08-20 | 2020-01-17 | 北京科技大学 | Niobium microalloyed high-strength high-weather-resistance angle steel and production process thereof |
| CN115612921A (en) * | 2022-09-02 | 2023-01-17 | 武汉钢铁有限公司 | 600 MPa-grade automobile wheel steel with good corrosion resistance and manufacturing method thereof |
| CN115612921B (en) * | 2022-09-02 | 2023-10-24 | 武汉钢铁有限公司 | 600 MPa-level automobile wheel steel with good corrosion resistance and manufacturing method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103352167B (en) | A kind of low yield strength ratio high strength bridge steel plate and manufacture method thereof | |
| CN101660099B (en) | High strength low alloy hot rolling ferrite bainite weathering resistant steel and production method thereof | |
| KR102240599B1 (en) | Highly Corrosion-resistant, High Strength, Al-containing Weathering Steel Plate and Process of Manufacturing Same | |
| CN101407892B (en) | Ultra-low carbon hot rolling weathering steel with yield strength larger than 550MPa | |
| CN100455692C (en) | High-strength weathering steel and method of manufacturing same | |
| CN114959460B (en) | Low-yield-ratio easy-welding weather-resistant bridge steel and manufacturing method thereof | |
| CN103436811B (en) | High-property super-thick steel plate for 500 MPa-level engineering structure and manufacturing method thereof | |
| JP5598157B2 (en) | Steel sheet for hot press excellent in delayed fracture resistance and collision safety and method for producing the same | |
| CN101497972B (en) | High strength low yield ratio welding structure steel and production method thereof | |
| KR100920536B1 (en) | High tensile and fire-resistant steel excellent in weldability and gas cutting property and method for production thereof | |
| CN101235468A (en) | Atmospheric corrosion resisting steel with yield strength more than 400MPa | |
| CN105586529B (en) | A kind of 890MPa grade high-strengths steel, steel pipe and its manufacture method | |
| CN101775561A (en) | Low-yield-ratio and high strength thick plate and preparation process thereof | |
| JP2011202214A (en) | Thick high tensile strength steel plate having excellent low temperature toughness in multilayer weld zone and method for producing the same | |
| CN112251674A (en) | Hot-rolled low-yield-ratio high-weather-resistant steel for railway passenger car and manufacturing method thereof | |
| CN105018856B (en) | The vertically and horizontally little structural steel for bridge plate of mechanical property difference and its manufacture method | |
| CN106521352A (en) | Niobium-containing heavy gauge weathering steel and rolling method thereof | |
| JP2010121191A (en) | High-strength thick steel plate having superior delayed fracture resistance and weldability, and method for manufacturing the same | |
| CN110358970B (en) | Welded structure bainite high-strength steel with yield strength of 1100MPa and preparation method thereof | |
| CN107557662A (en) | Quenching and tempering type 800MPa levels low-cost and easy-to welds steel plate and its production method | |
| CN102021489A (en) | Easily welded ageing high-strength steel and heat treatment process thereof | |
| CN113846269B (en) | Cold-rolled high-weather-resistance steel plate with high strength and plasticity and preparation method thereof | |
| CN103361573A (en) | 420MPa grade vanadium-containing nitrogen steel and production method thereof | |
| CN103614630A (en) | Steel for high-strength bridge and manufacturing method of steel | |
| CN101235470A (en) | Ultra-low carbon hot rolling weather-resisting steel with yield strength more than 450MPa |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Open date: 20080806 |