CN101487105A - Surface inverse segregation phosphor high phosphor weather resistant steel castings thin belt and manufacture method thereof - Google Patents
Surface inverse segregation phosphor high phosphor weather resistant steel castings thin belt and manufacture method thereof Download PDFInfo
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- CN101487105A CN101487105A CNA2009100104724A CN200910010472A CN101487105A CN 101487105 A CN101487105 A CN 101487105A CN A2009100104724 A CNA2009100104724 A CN A2009100104724A CN 200910010472 A CN200910010472 A CN 200910010472A CN 101487105 A CN101487105 A CN 101487105A
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Abstract
The invention relates to a high phosphorus and weather resistant steel cast rolling thin strip which has segregation phosphorus on the surface, and a preparation method thereof, which belong to the material technology field. The percentages of the components by weight are as follows: less than or equal to 0.12 percent of C, 0.15 percent to 0.75 percent of Si, 0.20 percent to 0.50 percent of Mn, 0.10 percent to 0.30 percent of P, less than or equal to 0.02 percent of S, 0.25 percent to 0.50 percent of Cu, 0.30 percent to 1.25 percent of Cr; 0.12 percent to 0.65 percent of Ni, and the balance of Fe. The preparation method is as follows: the refining liquid steel is obtained after a steelmaking material is melted and refined, a cast and rolled strip stock is prepared by using twin-roll thin strip cast-rolling equipment, the casting temperature is 1540 DEG C to 1600 DEG C, the roll-casting speed is 12 meters per minute to 120 meters per minute, the presupposition roll gap is 1 to 4mm; the cooling rate of the liquid steel can reach 10 <2> to 10<4> DEG C/s; and then cold rolling and annealing are carried out. The tensile strength of the strip is more than or equal to 405 MPa, and the elongation is more than or equal to 28 percent. Compared with the thin strip with high phosphorus and produced by the conventional process, the ductile-brittle transition temperature of the high phosphorus and weather resistant steel cast rolling thin strip can decrease by about 10 DEG C.
Description
Technical field
The invention belongs to the material technology field, high phosphorus weather-proof steel cast-rolling thin strip of particularly a kind of surperficial negative segregation phosphorus and preparation method thereof.
Background technology
Along with the proposition of notions such as the ecological economy and recycling economy, need more urgently steel scrap is effectively reclaimed.Phosphorus is one of topmost tramp element in the steel scrap, is easy to form segregation in conventional slab production process, causes serious fragility.Therefore the efficient recovery of steel scrap is how not only to improve in the steel phosphorus content but also does not produce destructive effects.On the other hand, phosphoric does not always play deleterious effects yet.As long as can eliminate the disadvantageous effect of phosphorous segregation, just can bring into play its solution strengthening and anti-corrosion effect.But in common process, it is very difficult eliminating phosphorous segregation.
Summary of the invention
At above technical problem, the invention provides high phosphorus weather-proof steel cast-rolling thin strip of a kind of surperficial negative segregation phosphorus and preparation method thereof.
The chemical ingredients of the high phosphorus weather-proof steel cast-rolling thin strip of surperficial negative segregation phosphorus of the present invention is by weight percentage: C≤0.12%, Si 0.15～0.75%, Mn 0.20～0.50%, P 0.10～0.30%, S≤0.02%, Cu 0.25～0.50%, Cr 0.30～1.25%; Ni 0.12～0.65%, and surplus is Fe and trace impurity.The phosphorus content of the high phosphorus weather-proof steel cast-rolling thin strip of surperficial negative segregation phosphorus is controlled between 0.14～0.26%, can makes the high phosphorus weather-proof steel cast-rolling thin strip obtain better mechanical property and corrosion resisting property combination; Further C, Si in the high phosphorus weather-proof steel cast-rolling thin strip of control surface negative segregation phosphorus and the composition of Cr are C 0.04～0.10%, Si 0.25～0.45%, Cr 0.30～0.70% by weight percentage, can obtain the best of breed of high phosphorus weather-proof steel cast-rolling thin strip mechanical property and corrosion resisting property.
The preparation method of the high phosphorus weathering steel strip of the surperficial negative segregation with phosphorus of the present invention may further comprise the steps:
1, melting: in the ratio of setting steelmaking feed is preheated to 100～300 ℃, puts into smelting furnace, under protection of inert gas, carry out melting.
2, refining: when the liquid steel temperature in the smelting furnace is 1530～1650 ℃, add deslagging agent, carry out refining under protection of inert gas, refining time is 2～30min; Molten steel after refining finishes leaves standstill 2～20min, obtains refined molten steel.
3, preparation roll casting sheet: adopt the double roll strip casting rolling plant to carry out casting refined molten steel, in the strip casting process, it is 1540～1600 ℃ that the opening of molten steel watered temperature, and roll casting speed is 12～120m/min, and default roll gap is 1～4mm; Blanketing with inert gas in the molten steel flow process; Obtaining thickness is the roll casting sheet of the surperficial negative segregation phosphorus of 1～5mm.This step has improved molten steel chemical Composition Control precision and purity by adopting protection of inert gas, has improved the roll casting sheet quality.
4, cold rolling and annealing: the roll casting sheet of preparation is cold rolling after overpickling, cold roling reduction is 20～85%, cold rolling back thickness is 0.7～3mm, and the 5～60min that anneals under 650～850 ℃ temperature obtains the high phosphorus weather-proof steel cast-rolling thin strip of finished surface negative segregation phosphorus.
The present invention has following outstanding feature and unusual effect:
(1) thin-belt casting rolling technology belongs to abbreviated system, meets the requirement of energy-saving and emission-reduction.Because speed of cooling is up to 10 in the molten steel solidification process
2～10
4℃/s, belong to typical inferior rapid solidification, it is poly-partially to the roll casting sheet surface in the effect of rolling load to be enriched in interdendritic low melting point element phosphorus, formed the follow-up cold rolling surperficial negative segregation that can't eliminate with annealing process, cause roll casting sheet center phosphorus content to reduce, guaranteed the intensity and the plasticity of strip.After cold rolled annealed, its tensile strength 〉=405MPa, unit elongation 〉=28% has reached the use standard of similar strip; Poly-partially phosphorus helps to form fine and close phosphate layer and on the surface, stoped the further corrosion of corrosive fluid to matrix, improved corrosion resisting property significantly, laboratory alternation of wetting and drying accelerated corrosion test result shows, 120 all after dates, its rusty scale thickness only are about 60% of 09CuPCrNi-A (comparative sample).
(2) in the high phosphorus weather-proof steel cast-rolling thin strip of surperficial negative segregation phosphorus, when phosphorus content is higher than 0.14%, compare with the high phosphorus strip of common process production, under the identical situation of phosphorus content, low about 10 ℃ relatively of the ductile-brittle transition temperatures of the high phosphorus weather-proof steel cast-rolling thin strip of surface negative segregation phosphorus, steel toughness improves.
Description of drawings
Fig. 1 is the high phosphorus weather-proof steel cast-rolling thin strip of the surperficial negative segregation phosphorus in the embodiment of the invention and the phosphorus content of conventional band-ductile-brittle transition temperature graphic representation.
Fig. 2 quickens 0.005mol/1NaHSO for the high phosphorus weather-proof steel cast-rolling thin strip of the surperficial negative segregation phosphorus among the embodiment 1 among the present invention, the high phosphorus weather-proof steel cast-rolling thin strip and the comparative sample of the surperficial negative segregation phosphorus among the embodiment 2 through the laboratory
3Shape appearance figure after solution (PH=4.5) corrosion 120 cycles (12 hours phases weekly); Wherein left side figure is comparative sample (09CuPCrNi-A) corrosion back pattern, and middle graph is embodiment 1 a product corrosion back pattern, and the right figure is embodiment 2 a products corrosion back pattern.
Fig. 3 thickens graphic representation for the corrosion of the laboratory accelerated corrosion test of the high phosphorus weather-proof steel cast-rolling thin strip of the high phosphorus weather-proof steel cast-rolling thin strip of the surperficial negative segregation phosphorus among the embodiment 1 among the present invention, the surperficial negative segregation phosphorus among the embodiment 2 and comparative sample; A thickens curve for the corrosion of embodiment 1 product among the figure, and B thickens curve for the corrosion of embodiment 1 product, and 09CuPCrNi-A is that the comparative sample corrosion thickens curve.
Fig. 4 for the high phosphorus weather-proof steel cast-rolling thin strip of the high phosphorus weather-proof steel cast-rolling thin strip of the surperficial negative segregation phosphorus among the embodiment 1 among the present invention, the surperficial negative segregation phosphorus among the embodiment 2 and comparative sample through laboratory accelerated corrosion 60 all after dates, the EDX at matrix/rusty scale interface is figure as a result; Wherein first figure is comparative sample (09CuPCrNi-A) EDX figure as a result, and second figure (A) is embodiment 1EDX figure as a result, and the 3rd figure (B) is embodiment 2EDX figure as a result.
Fig. 5 is the electron probe microanalysis (EPMA) figure as a result of roll casting sheet in the embodiment of the invention 2.
Embodiment
The rare gas element that adopts in the embodiment of the invention is an argon gas, and air pressure is 3～20 normal atmosphere.
The deslagging agent that adopts in the embodiment of the invention is the perlite insulation deslagging agent, and consumption is 0.4～0.6% of a molten steel weight.
The double roll strip casting mill parameter that adopts in the embodiment of the invention is: the roller shell material is a steel alloy; Casting roller diameter 500mm; Body of roll width 250mm; The type of cooling is inner water-cooled, and cooling water pressure is adjustable, maximum 0.3MPa; Can roll tape thickness 1～5mm.
The acid that pickling is adopted in the embodiment of the invention is that volume percent is 12～18% hydrochloric acid soln.
The smelting furnace that adopts in the embodiment of the invention is a medium-frequency induction furnace.
It below is the preferred embodiment of the present invention.
Embodiment 1
After steelmaking feed is preheated to 300 ℃, put into medium-frequency induction furnace, under argon shield, carry out melting.The air pressure of argon gas source of the gas is 20 normal atmosphere.
When liquid steel temperature during at 1540 ℃, add deslagging agent, carry out refining, refining time is 10min, adopts argon gas to protect during refining, ar pressure is 5 normal atmosphere; Refining is left standstill 3min after finishing, and prepares to open to water.
In the strip casting process, opening and watering temperature is 1560 ℃, and casting speed is 20m/min, and default roll gap is 1.4mm, and also adopting argon gas protection, ar pressure in the flow process of molten steel is 5 normal atmosphere; The roll casting sheet thickness that obtains is 1.7mm.In the molten steel solidification process, rate of cooling is 7.5 * 10
2℃/s.
Roll casting sheet is cold rolling after pickling, the 30min that under 750 ℃ temperature, anneals after rolling, and obtaining finished product high phosphorus weather-proof steel cast-rolling thin strip thickness is 0.8mm; Composition is C 0.076%, Si 0.341%, Mn 0.326%, P 0.150%, S 0.0083%, Cu 0.325%, Cr 0.510%, Ni 0.410% by weight percentage, and all the other are Fe and trace impurity.
The mechanical property of this finished product high phosphorus weather-proof steel cast-rolling thin strip is: tensile strength is 435MPa, yield strength is 315MPa, unit elongation is 32.5%, reached the use standard of the similar strip of common process production, ductile-brittle transition temperature is-45 ℃, the strip (conventional band) of the identical P content of producing than common process reduces by 10 ℃, and phosphorus content-ductile-brittle transition temperature effect is referring to Fig. 1.
Quicken 0.005mol/1NaHSO through the laboratory
3Solution (PH=4.5) corrosion 120 cycles (12 hours phases weekly) back pattern is referring to Fig. 2, and the weightening finish curve is referring to Fig. 3, and EDX result is referring to Fig. 4.
As seen from Figure 1, after 120 cycles (60 days) accelerated corrosion test, the rusty scale mean thickness of this finished product high phosphorus weather-proof steel cast-rolling thin strip is 54% of comparative sample 09CuPCrNi-A only, shows that this finished product high phosphorus weather-proof steel cast-rolling thin strip corrosion resistance obviously is better than comparative sample 09CuPCrNi-A.
(h, (t, variation hrs) can be by equation h=Kt m) in time for rusty scale thickness
n(wherein K and n are constant) describes.According to above-mentioned equation, adopt the nonlinear fitting method that the listed result of Fig. 2 is carried out match, the n value that can obtain comparative sample and high phosphorus weather-proof steel cast-rolling thin strip is respectively 0.48095 and 0.27411.Comparative sample n value approaches 0.5, its corrosion is described by diffusion control, and high phosphorus weather-proof steel cast-rolling thin strip n value illustrates and improved its corrosion resisting property because the stopping of tight zone in the rusty scale caused reducing of spread coefficient less than 0.5.
By among the EDX result of Fig. 3 as can be seen, rusty scale/basal body interface of comparative sample 09CuPCrNi-A does not have the phosphorus enrichment, and tangible phosphorus enrichment is arranged on high phosphorus weather-proof steel cast-rolling thin strip rusty scale/matrix, and illustrated that phosphorus has promoted fine and close phosphatic formation, stopped that corrosive fluid further contacts matrix.
After steelmaking feed is preheated to 300 ℃, put into medium-frequency induction furnace, under argon shield, carry out melting.The air pressure of argon gas source of the gas is 3 normal atmosphere.
When liquid steel temperature during at 1535 ℃, add deslagging agent, carry out refining, refining time is 10min, adopts argon gas to protect during refining, ar pressure is 3 normal atmosphere; Refining is left standstill 5min after finishing, and prepares to open to water.
In the strip casting process, opening and watering temperature is 1560 ℃, and casting speed is 20m/min, and default roll gap is 1.4mm, and also adopting argon gas protection, ar pressure in the flow process of molten steel is 3 normal atmosphere; The roll casting sheet thickness that obtains is 1.7mm.In the molten steel solidification process, rate of cooling is 3.0 * 10
3℃/s.
Roll casting sheet is cold rolling after pickling, the 30min that under 750 ℃ temperature, anneals after rolling, and obtaining finished product high phosphorus weather-proof steel cast-rolling thin strip thickness is 0.8mm; Composition is C 0.075%, Si 0.352%, Mn 0.320%, P 0.260%, S0.0057%, Cu 0.317%, Cr 0.505%, Ni 0.407% by weight percentage, and all the other are Fe and trace impurity.
This finished product high phosphorus weather-proof steel cast-rolling thin strip mechanical property is: tensile strength is 520MPa, and yield strength is 375MPa, and unit elongation is 30.0%, has reached the use standard of the similar strip of common process production; Ductile-brittle transition temperature is-25 ℃, and the strip (conventional band) of the identical P content of producing than common process reduces more than 10 ℃, and phosphorus content-ductile-brittle transition temperature effect is referring to Fig. 1.
Quicken 0.005mol/1NaHSO through the laboratory
3Solution (PH=4.5) corrosion 120 cycles (12 hours phases weekly) back pattern is referring to Fig. 2, and the weightening finish curve is referring to Fig. 3, and EDX result is referring to Fig. 4.
As seen from Figure 1, after 120 cycles (60 days) accelerated corrosion test, the rusty scale mean thickness of this finished product high phosphorus weather-proof steel cast-rolling thin strip is 51% of comparative sample 09CuPCrNi-A only, shows that this finished product high phosphorus weather-proof steel cast-rolling thin strip corrosion resistance obviously is better than comparative sample 09CuPCrNi-A.
The n value of this finished product high phosphorus weather-proof steel cast-rolling thin strip is respectively 0.27197, less than 0.5, illustrates because the stopping of tight zone in the rusty scale caused reducing of spread coefficient, has improved its corrosion resisting property.
Can observe in the roll casting sheet the significantly surperficial negative segregation of phosphorus by Fig. 5, cold rolling and annealing process subsequently can not be eliminated this macrosegregation.By among the EDX result of Fig. 3 as can be seen, on this finished product high phosphorus weather-proof steel cast-rolling thin strip rusty scale/matrix tangible phosphorus enrichment is arranged, illustrated that the phosphorus of segregation in the surface has promoted fine and close phosphatic formation, stopped that corrosive fluid further contacts matrix.
Embodiment 3
After steelmaking feed is preheated to 200 ℃, put into medium-frequency induction furnace, under argon shield, carry out melting.The air pressure of argon gas source of the gas is 10 normal atmosphere.
When liquid steel temperature during at 1580 ℃, add deslagging agent, carry out refining, refining time is 2min, adopts argon gas to protect during refining, ar pressure is 10 normal atmosphere; Refining is left standstill 10min after finishing, and prepares to open to water.
In the strip casting process, opening and watering temperature is 1540 ℃, and casting speed is 120m/min, and default roll gap is 1.0mm, and also adopting argon gas protection, ar pressure in the flow process of molten steel is 10 normal atmosphere; The roll casting sheet thickness that obtains is 1.3mm.In the molten steel solidification process, rate of cooling is 9.5 * 10
2℃/s.。
Roll casting sheet is cold rolling after pickling, the 60min that under 710 ℃ temperature, anneals after rolling, and obtaining finished product high phosphorus weather-proof steel cast-rolling thin strip thickness is 0.7mm; Composition is C 0.082%, Si 0.391%, Mn 0.423%, P 0.172%, S 0.0079%, Cu 0.298%, Cr 0.474%, Ni 0.603% by weight percentage, and all the other are Fe and trace impurity.
The mechanical property of this finished product high phosphorus weather-proof steel cast-rolling thin strip is: tensile strength is 450MPa, yield strength is 325MPa, unit elongation is 32.0%, has reached the use standard of the similar strip of common process production, and ductile-brittle transition temperature reduces by 10 ℃ than the strip of the identical P content that common process is produced.After 120 cycles (60 days) accelerated corrosion test, the rusty scale mean thickness of this finished product high phosphorus weather-proof steel cast-rolling thin strip only is 52% of comparative sample 09CuPCrNi-A.
After steelmaking feed is preheated to 150 ℃, put into medium-frequency induction furnace, under argon shield, carry out melting.The air pressure of argon gas source of the gas is 8 normal atmosphere.
When liquid steel temperature during at 1610 ℃, add deslagging agent, carry out refining, refining time is 20min, adopts argon gas to protect during refining, ar pressure is 8 normal atmosphere; Refining is left standstill 15min after finishing, and prepares to open to water.
In the strip casting process, opening and watering temperature is 1570 ℃, and casting speed is 40m/min, and default roll gap is 2.0mm, and also adopting argon gas protection, ar pressure in the flow process of molten steel is 8 normal atmosphere; The roll casting sheet thickness that obtains is 2.5mm.In the molten steel solidification process, rate of cooling is 1.2 * 10
3℃/s.。
Roll casting sheet is cold rolling after pickling, the 5min that under 850 ℃ temperature, anneals after rolling, and obtaining finished product high phosphorus weather-proof steel cast-rolling thin strip thickness is 1.3mm; Composition is C 0.055%, Si 0.264%, Mn 0.225%, P 0.194%, S 0.0091%, Cu 0.383%, Cr 0.656%, Ni 0.143% by weight percentage, and all the other are Fe and trace impurity.
The mechanical property of this finished product high phosphorus weather-proof steel cast-rolling thin strip is: tensile strength is 470MPa, yield strength is 335MPa, unit elongation is 31.5%, reached the use standard of the similar strip of common process production, ductile-brittle transition temperature reduces more than 10 ℃ than the strip of the identical P content that common process is produced.After 120 cycles (60 days) accelerated corrosion test, the rusty scale mean thickness of this finished product high phosphorus weather-proof steel cast-rolling thin strip only is 60% of comparative sample 09CuPCrNi-A.
Embodiment 5
After steelmaking feed is preheated to 100 ℃, put into medium-frequency induction furnace, under argon shield, carry out melting.The air pressure of argon gas source of the gas is 15 normal atmosphere.
When liquid steel temperature during at 1650 ℃, add deslagging agent, carry out refining, refining time is 30min, adopts argon gas to protect during refining, ar pressure is 15 normal atmosphere; Refining is left standstill 20min after finishing, and prepares to open to water.
In the strip casting process, opening and watering temperature is 1600 ℃, and casting speed is 12m/min, and default roll gap is 2.5mm, and also adopting argon gas protection, ar pressure in the flow process of molten steel is 15 normal atmosphere; The roll casting sheet thickness that obtains is 3.2mm.In the molten steel solidification process, rate of cooling is 1.4 * 10
3℃/s.。
Roll casting sheet is cold rolling after pickling, the 10min that under 800 ℃ temperature, anneals after rolling, and obtaining finished product high phosphorus weather-proof steel cast-rolling thin strip thickness is 2.1mm; Composition is C 0.092%, Si 0.416%, Mn 0.398%, P 0.211%, S 0.0067%, Cu 0.346%, Cr 0.387%, Ni 0.399% by weight percentage, and all the other are Fe and trace impurity.
The mechanical property of this finished product high phosphorus weather-proof steel cast-rolling thin strip is: tensile strength is 460MPa, yield strength is 332MPa, unit elongation is 30.25%, reached the use standard of the similar strip of common process production, ductile-brittle transition temperature reduces more than 10 ℃ than the strip of the identical P content that common process is produced.After 120 cycles (60 days) accelerated corrosion test, the rusty scale mean thickness of this finished product high phosphorus weather-proof steel cast-rolling thin strip only is 53.5% of comparative sample 09CuPCrNi-A.
Claims (4)
1, a kind of high phosphorus weather-proof steel cast-rolling thin strip of surperficial negative segregation phosphorus is characterized in that: the composition of the high phosphorus weather-proof steel cast-rolling thin strip of surperficial negative segregation phosphorus is by weight percentage: C≤0.12%, Si 0.15～0.75%, Mn 0.20～0.50%, P 0.10～0.30%, S≤0.02%, Cu 0.25～0.50%, Cr 0.30～1.25%; Ni 0.12～0.65%, and surplus is Fe.
2, the preparation method of the high phosphorus weather-proof steel cast-rolling thin strip of the described a kind of surperficial negative segregation phosphorus of claim 1, it is characterized in that: will obtain refined molten steel after the melting of steelmaking feed process, the refining, then refined molten steel is adopted the double roll strip casting rolling plant to prepare the roll casting sheet of surperficial negative segregation phosphorus, in the strip casting process, it is 1540～1600 ℃ that the opening of molten steel watered temperature, roll casting speed is 12～120m/min, and default roll gap is 1～4mm; Blanketing with inert gas in the molten steel flow process; The roll casting sheet of preparation is cold rolling after overpickling, and cold roling reduction is 20～85%, and cold rolling back thickness is 0.7～3mm, and 5～60min anneals under 650～850 ℃ temperature; Obtain the high phosphorus weather-proof steel cast-rolling thin strip of surperficial negative segregation phosphorus.
3, the preparation method of the high phosphorus weather-proof steel cast-rolling thin strip of a kind of surperficial negative segregation phosphorus according to claim 2 is characterized in that described melting: steelmaking feed is preheated to 100～300 ℃, puts into smelting furnace, carry out melting under protection of inert gas.
4, the preparation method of the high phosphorus weather-proof steel cast-rolling thin strip of a kind of surperficial negative segregation phosphorus according to claim 2, it is characterized in that described refining: when the liquid steel temperature in the smelting furnace is 1530～1650 ℃, add deslagging agent, carry out refining under protection of inert gas, refining time is 2～30min; Molten steel after refining finishes leaves standstill 2～20min, obtains refined molten steel.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2009100104724A CN101487105A (en) | 2009-02-27 | 2009-02-27 | Surface inverse segregation phosphor high phosphor weather resistant steel castings thin belt and manufacture method thereof |
| CN2009103065632A CN101671797B (en) | 2009-02-27 | 2009-09-04 | High-phosphorous weather-proof steel cast-rolling thin strip with negative phosphorous segregation on surface and preparation method thereof |
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| CNA2009100104724A CN101487105A (en) | 2009-02-27 | 2009-02-27 | Surface inverse segregation phosphor high phosphor weather resistant steel castings thin belt and manufacture method thereof |
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| CNA2009100104724A Pending CN101487105A (en) | 2009-02-27 | 2009-02-27 | Surface inverse segregation phosphor high phosphor weather resistant steel castings thin belt and manufacture method thereof |
| CN2009103065632A Expired - Fee Related CN101671797B (en) | 2009-02-27 | 2009-09-04 | High-phosphorous weather-proof steel cast-rolling thin strip with negative phosphorous segregation on surface and preparation method thereof |
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- 2009-09-04 CN CN2009103065632A patent/CN101671797B/en not_active Expired - Fee Related
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| CN111363972A (en) * | 2018-12-25 | 2020-07-03 | 新疆八一钢铁股份有限公司 | Production method of weathering resistant steel Q355NHD |
| CN113574195A (en) * | 2019-03-12 | 2021-10-29 | 国立大学法人大阪大学 | Weather-resistant steel for solid-phase bonding, weather-resistant steel material for solid-phase bonding, solid-phase bonded structure, and solid-phase bonding method |
| CN110318006A (en) * | 2019-07-31 | 2019-10-11 | 马鞍山钢铁股份有限公司 | A kind of cold rolling weather resisting steel and preparation method thereof |
| CN110318006B (en) * | 2019-07-31 | 2021-08-10 | 马鞍山钢铁股份有限公司 | Cold-rolled weathering steel and preparation method thereof |
| CN111647824A (en) * | 2020-07-29 | 2020-09-11 | 攀钢集团研究院有限公司 | 510MPa grade high-silicon high-phosphorus high-chromium weathering steel and preparation method thereof |
| CN115287532A (en) * | 2022-07-13 | 2022-11-04 | 首钢集团有限公司 | Coating-free high-phosphorus high-performance weathering steel and preparation method and application thereof |
| CN115287532B (en) * | 2022-07-13 | 2023-08-11 | 首钢集团有限公司 | Coating-free high-phosphorus high-performance weather-resistant steel and preparation method and application thereof |
| CN116623106A (en) * | 2023-05-16 | 2023-08-22 | 南京钢铁股份有限公司 | High weather-resistant steel plate for 355 Mpa-level shock insulation support and manufacturing method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101671797A (en) | 2010-03-17 |
| CN101671797B (en) | 2011-09-21 |
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