CN1946867A - High copper low alloy steel sheet - Google Patents
High copper low alloy steel sheet Download PDFInfo
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- CN1946867A CN1946867A CNA2005800093541A CN200580009354A CN1946867A CN 1946867 A CN1946867 A CN 1946867A CN A2005800093541 A CNA2005800093541 A CN A2005800093541A CN 200580009354 A CN200580009354 A CN 200580009354A CN 1946867 A CN1946867 A CN 1946867A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/001—Continuous casting of metals, i.e. casting in indefinite lengths of specific alloys
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0622—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by two casting wheels
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/10—Ferrous alloys, e.g. steel alloys containing cobalt
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
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Abstract
A high copper low alloy steel sheet made by the steps comprising preparing a molten melt producing an as-cast low alloy steel comprising by weight, between 0.02 % and 0.3% carbon, between 0.10% and 1.5% manganese, between 0.01% and 0.5% silicon, between 0.002 and 0.0095% sulfur, greater than 0.01 % and less than or equal to 0.15% phosphorus, less than 0.05% aluminum, more than 0.20% copper, less than 0.03 % tin, and less than 0.10 % nickel, and the remainder iron and impurities resulting from melting, and solidifying the molten melt into sheet less than 10 mm in thickness in a non-oxidizing atmosphere to below 1080 DEG C. The copper content may be between 0.2% and 2.0% by weight. The high copper low alloy steel may also have a corrosion index (I) of at least 6.0 in accordance with ASTM G101 where: I = 26.01 (% Cu) + 3.88 (% Ni) + 1.20 (% Cr) + 1.49 (% Si) + 17.28 (% P) - 7.29 (% Cu)(% Ni) - 9.10 (% Ni)(% P) - 33.39 (% Cu). The high copper low alloy steel may be produced by twin roll casting, and may have thickness less than 5 mm or less than 2 mm in thickness.
Description
Technical field
High copper low alloy steel sheet was well-known in the past, and knew erosion resistance can be provided; Yet, contain and have an appointment 0.50% or this low alloy steel of more copper, show in the hot procedure of being everlasting " red brittleness " that to such an extent as to the surface of crackle or extremely rough is called " checking " sometimes, this can development in thermal deformation process.Referring to, the manufacturing of steel, shaping and processing (the 9th edition), the 1154th page of (The Making, Shaping and Treating of Steel (9
ThEdition, page 1154)).The hot short appearance is because in the surface oxidation process, copper separates the layer that arrives near the surface of steel plate of being produced by zone of oxidation, causes industrial unacceptable steel.The appearance of these undesirable condition of surface can be by the oxidation in the careful control heat-processed and carefully do not make overheated in the hot procedure, also can be reduced to minimum degree.In addition, knownly add for the surface quality of Copper Bearing Steel highly beneficial with half the amount that equals copper content at least nickel.Yet these programs and alloy addition are expensive, thereby make the corrosion-resistant steel costliness that is generated.Notably, nickel is expensive alloy addition, causes that therefore the corrosion-resistant steel of being produced is also expensive.
Copper, known in the resistance to atmospheric corrosion that improves carbon steel in the concentration of its use, in all common alloying elements, be the most potential.The content of known copper in regular carbon steel is effective especially up to about 0.35% o'clock.As mentioned above, have about 0.50% or the steel of more copper have the red brittleness problem.Yet these copper content are acceptables in about 100mm or above slab, and hot short deleterious effect can be reduced to minimum level by band thermal reduction afterwards.
The permission content of copper reduces along with the minimizing of slab thickness.For the 50mm thickness of producing in thinslab casting, the content of having found copper can be avoided hot short harmful effect in the thin plate in about 0.20% weight or when following.In fact, find that the content of copper need remain below 0.10% usually, to avoid red brittleness to influencing by the laminose inhibition of this thin slab.Fig. 1 and 2 shows that the thickness of being made by thinslab casting is hot short harmful effect in the 50mm steel slab surface.This is a kind of steel constituent with middle carbon and copper and two kinds of additives of nickel, that is, and and 0.18% carbon, 0.53% manganese, 0.009% phosphorus, 0.008% sulphur, 0.025% silicon, 0.23% copper, 0.21% nickel, 0.01% tin and 0.06% chromium.It should be noted that as illustrated in fig. 1 and 2, even roughly the same with the interpolation of the copper hydrocarbon of the interpolation of nickel is subjected to red brittleness.
The red brittleness problem has also improved uses electric arc furnace smelting low alloy steel to make the cost of molten carbon steel.With about 75% of electric arc furnace steel-making cost is the steel cuttings cost that is used as the raw material of electric arc furnace charging.Can be divided into by copper content by the traditional method steel cuttings and to be lower than 0.15% weight copper, more than or equal to 0.15% up to 0.5% weight copper and be higher than 0.5% weight.Have the steel cuttings that copper content is higher than 0.5% bronze medal and can mix with the steel cuttings of low copper content to make acceptable steel cuttings, this also is added to the cost that obtains steel cuttings from industry.In any case, the low copper steel bits that are lower than 0.15% weight are the most expensive steel cuttings of price, and the cost of the steel cuttings of other two kinds of grades is low.When making steel sheet with the traditional industry method, for example with successive heavy slab or thin slab casting, only having the steel cuttings that is lower than 0.15% bronze medal is used for electric arc furnace usually.This has significantly increased production steel-sheet expense.Having up to the scrap grades of 0.5% bronze medal content is useful at the electric arc furnace that uses small section mill (bar mill), perhaps by with the remarkable expense of low copper content steel cuttings blended under, the total copper content that reduces steel cuttings is to being lower than 0.15%.
Disclosure of an invention
The applicant finds to produce thickness to be 10mm and to be lower than the high copper low alloy steel sheet of this value, and does not add a large amount of nickelalloys, and it is lower than 1080 ℃ by solidifying and being cooled in non-oxidizing atmosphere,, be lower than the temperature of solidification of copper that is.In this way, red brittleness can reduce by the oxidation that suppresses plate surface.So-called low alloy steel refers to sulphur between the silicon, 0.002% and 0.0095% between the manganese, 0.01% and 0.5% between the carbon, 0.10% and 1.5% that has between 0.02% and 0.3%, greater than 0.01% be less than or equal to 0.15% phosphorus, be lower than 0.05% aluminium, at least 0.20% copper, be lower than 0.03% tin and be lower than the steel of 0.10% nickel.The copper content of copper low alloy steel is between 0.20% and 2.0%.The sulphur content that we also find to be higher than 0.002% be particularly important for promote molten steel and fully contacting of continuous caster surface must (along with the sulphur content of raising alleviates the defective of vibrations), but for avoiding the coarse and cracking of the significant crocodile skin in steel surface, Cast Strip, sulphur content will be below 0.0095%.Sulphur content can be between 0.003 and 0.009%.Nonoxidizing atmosphere generally is the atmosphere of rare gas element such as nitrogen or argon or its mixture, and it contains the oxygen that is lower than about 5% weight.
Also has at least 6.0 scaling index (I) by ASTM G101-01 copper low alloy steel, wherein
I＝26.01(％Cu)+3.88(％Ni)+1.20(％Cr)+1.49(％Si)+17.28(％P)-7.29(％Cu)(％Ni)-9.10(％Ni)(％P)--33.39(％Cu)
2。
High copper low alloy steel sheet can be made through the following steps, and it comprises:
(a) molten mass of a kind of production as cast condition low alloy steel of preparation, this molten mass comprises
(i) by weight, carbon between 0.02% and 0.3%, manganese between 0.10% and 1.5%, silicon between 0.01% and 0.5%, 0.002 and the sulphur between 0.0095%, greater than 0.01% and be less than or equal to 0.15% phosphorus, be lower than 0.05% aluminium, copper greater than 0.20%, the nickel that is lower than 0.03% tin and is lower than 0.10%;
The impurity that (ii) remains iron and produce by fusion;
(b) solidification of molten body to thickness is lower than the sheet material of 10mm in non-oxidizing atmosphere.And in non-oxidizing atmosphere, be cooled to and be lower than 1080 ℃.
High copper low alloy steel sheet also can be made through the following steps, and it comprises:
(a) molten mass of a kind of production as cast condition low alloy steel of preparation, this molten mass comprises
(i) % counts by weight, carbon between 0.02% and 0.3%, manganese between 0.10% and 1.5%, silicon between 0.01% and 0.5%, the sulphur between 0.002% and 0.0095% is greater than 0.01 be less than or equal to 0.15% phosphorus, be lower than 0.05% aluminium, copper greater than 0.20% is lower than 0.03% tin, and the nickel that is lower than 0.05%;
The impurity that (ii) remains iron and produce by fusion;
(b) at the casting surface that is bearing in a pair of cooling casting roller that has roll gap therebetween molten mass is formed the casting molten bath;
(c) make the casting roll reverse rotation be lower than the thin Cast Steel Plate of 10mm or be with steel to form the thickness that extends from roll gap downwards; With
(d) in nonoxidizing atmosphere, cool off the Cast Strip steel to being lower than 1080 ℃.
The thickness of the high copper low alloy steel sheet of being produced (or band steel) is lower than 5mm or is lower than 2mm.The copper content of copper low alloy steel is between 0.20% and 2.0%.In addition, nonoxidizing atmosphere is the atmosphere of rare gas element such as nitrogen or argon or its mixture typically, and it contains the oxygen that is lower than about 5% weight.
Have, copper low alloy steel also has at least 6.0 scaling index by ASTM G101-01 again, wherein:
I＝26.01(％Cu)+3.88(％Ni)+1.20(％Cr)+1.49(％Si)+17.28(％P)-7.29(％Cu)(％Ni)-9.10(％Ni)(％P)-33.39(％Cu)
2。
Also disclose is to make the copper low alloy steel that thickness is lower than 10mm by special method.Can use double-roller continuous casting machine to make copper low alloy steel by the following open method of setting forth in further detail.Have, the thickness of high copper low alloy steel strip can be lower than 5mm or be lower than 2mm again.
Brief description of drawings
In order to set forth the present invention more fully, the illustrative result of the cut-and-try work of carrying out so far illustrated with reference to the accompanying drawings, wherein:
Fig. 1 and 2 is that exemplary illustration is cast the red brittleness Photomicrograph that the corrosion-resistant low-alloy steel billet made stands with thin slab in known technology;
Fig. 3 is the illustrated side view of the two roll strip continuous casters of exemplary illustration;
Fig. 4 is the amplification sectional view of Fig. 3 exemplary illustration part continuous caster;
Fig. 5 shows and the existing low alloy steel contrast with copper interpolation, the interests figure of copper low alloy steel of the present invention;
Fig. 6 and 7 shows by thin cast strip to make the surface that thickness is the high copper low alloy steel sheet of 1.7mm, also shows and suppresses hot short displaing micro photo figure.
Detailed description of preferred embodiments
Two roller continuous belt steel continuous casters that Fig. 3 and 4 explanations are operated when making high copper low alloy band steel by the present invention.The following explanation of having described embodiment is in the scope of using double-roller continuous casting machine continuous casting band steel.Yet, the invention is not restricted to use double-roller continuous casting machine, can extend to the continuous belt steel continuous caster of other type and make other method of steel-sheet.
Fig. 3 shows the each several part in succession of illustrative production line, whereby according to produce steel sheet (or band steel) with two rod continuous casters.Fig. 3 and 4 explanations generally are expressed as the double-roller continuous casting machine of 11 production casting band steel 12, and band steel 12 passes transport passage 10 and crosses guiding roller-way 13 to the pinch rolls frame 14 that comprises pinch rolls 14A.After withdrawing from pinch rolls frame 14, the band steel is randomly sent into the hot rolls 16 that comprises a pair of reduction roll 16A and support roll 16B at once, carries out hot rolling whereby to reduce its thickness.That situation no matter, the band that rolled all leads to runoff table 17, contacts by convection current and/or with the water of being supplied through water spouting nozzle 18 (or other suitable device) thereon to cool off and by radiation.Under any circumstance, can be by comprising the stretch-draw frame 20 of a pair of pinch rolls 20A after the rolling band steel, and thereby arrive reeling machine 19.The final cooling (if necessary) of band steel is to cool off after batching by coiled material.
As shown in Figure 4, double-roller continuous casting machine 11 comprises mainframe 21, and it carries the casting roll that respectively has casting plane 22A 22 of a pair of horizontal positioned, and it is to have the assembling side by side of roll gap 27 therebetween.Molten metal from the steel teeming ladle (not shown) in the casting operation process infeeds tundish 23, arrive divider 25 (also can be called movably tundish) by refractory brick cover 24, and therefrom by being installed in the metal discharged orifice 26 of roll gap 27 tops between the casting roll 22 usually.Deliver to the molten metal of roll gap 27 like this, above the roll gap 27 that is supported on the casting roll surface 22A, form casting molten bath 30.The casting molten bath is limited in the end of roller usually by a pair of side-closed backgauge dam or plate washer 28, backgauge dam or baffle plate are positioned at the end of close roller by a pair of push rod (not shown) that comprises the hydraulic cylinder unit (or other suitable device) that is connected with the side plate anchor clamps.The surface, top (generally being called " meniscus level ") in casting molten bath 30 can rise to the top of the lower end of discharged orifice 26, so that the lower end of discharged orifice can be immersed in the casting molten bath.
Casting roll 22 cools off in inside by water or other suitable refrigerant, so that the skin that spatters of steel solidifies on the removable casting plane 22A of roller 22 in the roller rotary course.The skin that spatters that solidifies accumulates on the roll gap 27 between casting roll, produces casting band steel 12, and it is discharged downwards from roll gap.
As mentioned above, frame 21 supporting casting roll bases, this base can move horizontally between assembly area and casting region.Casting roll 22 is by reverse rotation of electric motor driven transmission shaft (not shown) and transmission.Roller 22 has the perisporium of copper, and it is by a series of vertical extensions and formed along the cooling channel of peripheral gapped supply coolant.Usually the about 500mm of diameter of roller and generally reach about 2000mm and grow is to produce the wide belt steel product of about 2000mm.
Movably tundish 25 are conventional structures.It by refractory materials for example magnesium oxide (MgO) make plate-like.One side of tundish can be accepted from the molten metal of steel teeming ladle and be equipped with the overflow stem bar and as shown in Figure 4 emergency use plug.
Discharged orifice 26 is slender bodys of making by such as the refractory materials of alumina graphite.Its lower curtate is taper, so that can be inwardly and collect in the roll gap top of 22 of casting rolls downwards.Discharged orifice 26 has the passage that is generally extend perpendicular stream of a series of horizontal intervals, spreads all over the suitable low velocity discharge molten metal of casting roll 22 width with generation, and the here generation initial solidification of conveying molten metals to the roll surface 22A of roller 22.Use another kind of method, discharged orifice 26 has the outlet of single continuous slit with the direct low speed thin layer of conveying molten metals above the roll gap between roller.Have, discharged orifice can immerse the molten bath 30 of molten metal again.
Casting molten bath 30 is limited in the end of roller by a pair of side-closed plate 28, when roller base during at casting region, described closure plate in abutting connection with and keep staged end facing to roller 22.Be that for example boron nitride is made by strong refractory materials side seal closing plate 28 illustratives, and have into the segmental side, be complementary with curved part with the staged end of roller 22.Side plate 28 is installed in the bearing of plate, it can move by the driving of pair of hydraulic cylinders unit (or other appropriate device) at casting region, so that the engagement of the staged end of side plate and casting roll 22 makes the casting molten bath 30 that is bearing in the metal on the 22A of casting roll surface form end closure in the casting operation process.
Double-roller continuous casting machine can be the kind that describes in detail and describe in following document, for example, and at United States Patent (USP) 5184668; 5227243; 5488988 and/or 5934359; U.S. patent application 10/436336; And International Patent Application PCT/AU93/00593, the disclosed content of these patents is incorporated herein as a reference.Can be for suitable constructional details with reference to these patents, but these details do not constitute part of the present invention.
In order to illustrate, high copper low alloy steel sheet can be made the thin Cast Strip steel that thickness is 1.7mm by double-roller continuous casting machine.This band steel has following chemical constitution: 0.048% carbon, 0.636% manganese, 0.117% phosphorus, 0.005% sulphur, 0.252% silicon, 0.261% copper, 0.034% nickel, 0.027% chromium, 0.015% molybdenum, 0.006% tin, 0.001% aluminium, 0.001% titanium, 0.001% zinc, 0.0072% nitrogen and other impurity that exists in steel cuttings usually.Described steel is also checked, but does not find to have vanadium, lead, calcium or the boron of any detection limit.This steel is called melting #232613 (test #1), and makes the 4 kinds of coiled materials (that is, 1,2,3 and No. 4) that detect.
Second kind of high copper low alloy steel sheet is to make the thin Cast Strip steel that thickness is 1.7mm by the twin shaft continuous caster.This band steel has following chemical constitution: 0.049% carbon, 0.554% manganese, 0.043% phosphorus, 0.009% sulphur, 0.227% silicon, 0.417% copper, 0.030% nickel, 0.067% chromium, 0.011% molybdenum, 0.005% tin, 0.001% aluminium, 0.001% lead, 0.001% titanium, 0.001% zinc, 0.0065% nitrogen and other impurity that exists in steel cuttings usually.Composition also detects vanadium, niobium, calcium and boron, but does not measure any.This steel is appointed as melting #137162 (test #2).And make 4 kinds of coiled materials (that is, 1,2,3 and No. 5) of testing.Do not detect coiled material #4, because it is lath brick (pup).
The coiled material that testing experiment 1 and 2 is made the results are shown in the following table 1.
Table 1
| Melting number-coiled material number | Thickness (mm) | Force-at-yield (psi) | Tensile strength (psi) | Breaking elongation (%) |
| 232613-01 | 1.7 | ?48,800 | ?74,600 | ?22.2 |
| 232613-02 | 1.7 | ?43,500 | ?76,900 | ?21.2 |
| 232613-03 | 1.7 | ?46,000 | ?72,700 | ?22.2 |
| 232613-04 | 1.7 | ?47,200 | ?76,400 | ?21.7 |
| 137162-01 | 1.7 | ?48,100 | ?67,500 | ?23.2 |
| 137162-02 | 1.7 | ?52,800 | ?71,800 | ?18.2 |
| 137162-03 | 1.7 | ?57,000 | ?73,200 | ?16.2 |
| 137162-05 | 1.7 | ?55,600 | ?73,400 | ?19.7 |
These data to initial trial can with ASTM 606 fine comparisons, the minimum force-at-yield of ASTM606 regulation is 50000psi, minimum tensile strength is 70000psi, minimum unit elongation is 22%.The bright red brittleness of extensibility cross-examination of band steel descends in these detect, if do not eliminate, then because red brittleness causes the breaking elongation of known band steel to be lower than 10% usually.
These data also illustrate the present invention's operation with the different sulphur contents in 0.002% scope, for promoting that the abundant contact between molten steel and the casting roll surface is necessary, coarse and the cracking for fear of the serious crocodile skin of belt steel surface, or to be lower than 0.0095% sulphur be necessary.Specifically, the sulphur content in the first band steel is 0.005%, and the sulphur content in the second band steel is 0.009%.As previously mentioned, sulphur content should be between 0.003% and 0.009%.
Fig. 5 shows that high copper low alloy steel sheet of the present invention is suppressing aspect the red brittleness surprising improvement is arranged.As the function from the copper % that can obtain data, the steel plate of solid line explanation known technology is to hot short permissible value.Dotted line is the extension of solid line, shows admissible expectation copper content when not having red brittleness in being lower than the thick steel plate of 10mm.As from Fig. 5 finding, these copper content be lower than 0.15% and near and be lower than 0.1%.On the contrary, not having the copper content that allows under the elementary heat fragility in thickness is the high copper low alloy steel sheet of the present invention of 10mm, is greater than 0.2%, when the thick Cast Strip steel of 1.7mm, is 0.4% and higher.In fact, casting does not have red brittleness when the 1.9mm thickness up to the copper low alloy steel of 1.5% bronze medal.
Fig. 6 and 7 is the Photomicrographs that show the surface that does not have hot short copper low alloy steel or band steel.By Fig. 6 and 7 and the contrast of top Fig. 1 and 2 be the most tangible in the advantage that suppresses aspect the red brittleness.Copper low alloy steel also can have at least 6.0 scaling index (I), wherein:
I＝26.01(％Cu)+3.88(％Ni)+1.20(％Cr)+1.49(％Si)+17.28(％P)-7.29(％Cu)(％Ni)-9.10(％Ni)(％P)-33.39(％Cu)
2。
Though understand the present invention in detail with reference to some embodiments, be to be understood that to the invention is not restricted to disclosed embodiment.On the contrary, the present invention covers change, improvement and the equivalent structure that exists in the scope of the invention and the spirit, and expectation is protected.
Claims (24)
1. high copper low alloy steel sheet, its method preparation by comprising the following steps:
(a) molten mass of a kind of production as cast condition low alloy steel of preparation, this molten mass comprises
(i) by weight, carbon between 0.02% and 0.3%, manganese between 0.10% and 1.5%, silicon between 0.01% and 0.5%, the sulphur between 0.002 and 0.0095% is greater than 0.01% be less than or equal to 0.15% phosphorus, be lower than 0.05% aluminium, copper greater than 0.20% is lower than 0.03% tin and is lower than 0.10% nickel;
The impurity that (ii) remains iron and produce by fusion;
(b) solidifying molten mass in non-oxidizing atmosphere becomes the steel plate that is lower than 10mm thickness and is cooled to and be lower than 1080 ℃.
2. by the described high copper low alloy steel sheet of claim 1, wherein scaling index (I) is at least 6.0, wherein:
I＝26.01(％Cu)+3.88(％Ni)+1.20(％Cr)+1.49(％Si)+17.28(％P)-7.29(％Cu)(％Ni)-9.10(％Ni)(％P)-33.39(％Cu)
2。
3. by the described high copper low alloy steel sheet of claim 1, wherein total % weight of copper is between 0.2 and 2.0.
4. by the described high copper low alloy steel sheet of claim 1, the thickness of wherein said steel plate is lower than 5mm.
5. by the described high copper low alloy steel sheet of claim 1, the thickness of wherein said steel plate is lower than 2mm.
6. by the described high copper low alloy steel sheet of claim 1, wherein the % weight of sulphur is between 0.003 and 0.009.
7. high copper low alloy steel sheet, it is made through the following steps and comprises:
(a) molten mass of a kind of production as cast condition low alloy steel of preparation, this molten mass comprises
(i) by weight, carbon between 0.02% and 0.3%, silicon between the manganese between 0.10% and 1.5%, 0.01% and 0.5%, sulphur between 0.002% and 0.0095%, greater than 0.01% be less than or equal to 0.15% phosphorus, be lower than 0.05% aluminium, copper greater than 0.20%, be lower than 0.03% tin and be lower than 0.10% nickel;
The impurity that (ii) remains iron and produce by fusion;
(b) molten mass is formed the casting molten bath on the casting plane that is supported on a pair of cooling casting roller that roll gap arranged therebetween;
(c) the reverse rotation casting roll is to form the thin Cast Steel Plate that is lower than 10mm thickness that extends from roll gap downwards; With
(d) at non-oxidizing atmosphere internal cooling Cast Steel Plate to being lower than 1080 ℃.
8. by the described high copper low alloy steel sheet of claim 7, wherein scaling index (I) is at least 6.0, wherein:
I＝26.01(％Cu)+3.88(％Ni)+1.20(％Cr)+1.49(％Si)+17.28(％P)-7.29(％Cu)(％Ni))-9.10(％Ni)(％P)-33.39(％Cu)
2。
9. by the described high copper low alloy steel sheet of claim 7, wherein total % weight of copper is between 0.2 and 2.0.
10. by the described high copper low alloy steel sheet of claim 7, wherein the thickness of thin Cast Steel Plate is lower than 5mm.
11. by the described high copper low alloy steel sheet of claim 7, wherein the thickness of thin Cast Steel Plate is lower than 2mm.
12. by the described high copper low alloy steel sheet of claim 7, wherein the % weight of sulphur is between 0.003 and 0.009.
13. make the method for high copper low alloy steel sheet, it may further comprise the steps:
(a) molten mass of a kind of production as cast condition Low Alloy Steel Plate of preparation, this molten mass comprises
(i) by weight, carbon between 0.02% and 0.3%, manganese between 0.10% and 1.5%, silicon between 0.01% and 0.5%, sulphur between 0.002% and 0.0095% greater than 0.01% be less than or equal to 0.15% phosphorus, is lower than 0.05% aluminium, copper greater than 0.20% is lower than 0.03% tin and is lower than 0.10% nickel;
The impurity that (ii) remains iron and produce from fusion;
(b) molten mass is lower than in non-oxidizing atmosphere and is frozen into the steel plate that is lower than 10mm thickness under 1080 ℃.
14. by the method for the described manufacturing high copper low alloy steel sheet of claim 13, wherein scaling index is at least 6.0, wherein
I＝26.01(％Cu)+3.88(％Ni)+1.20(％Cr)+1.49(％Si)+17.28(％P)-7.29(％Cu)(％Ni)-9.10(％Ni)(％P)-33.39(％Cu)
2。
15. by the method for the described manufacturing high copper low alloy steel sheet of claim 13, wherein total % weight of copper is between 0.2 and 2.0.
16. by the method for the described manufacturing high copper low alloy steel sheet of claim 13, the thickness of wherein thin Cast Strip steel is lower than 5mm.
17. by the method for the described manufacturing high copper low alloy steel sheet of claim 13, the thickness of wherein thin Cast Strip steel is lower than 2mm.
18. by the method for the described manufacturing high copper low alloy steel sheet of claim 13, wherein the % weight of sulphur is between 0.003 and 0.009.
19. make the method for high copper low alloy steel sheet, it may further comprise the steps:
(a) molten mass of a kind of production as cast condition low alloy steel of preparation, this molten mass comprises
(i) by weight, carbon between 0.02% and 0.3%, manganese between 0.10% and 1.5%, silicon between 0.01% and 0.5%, sulphur between 0.002% and 0.0095% greater than 0.01% be less than or equal to 0.15% phosphorus, is lower than 0.05% aluminium, copper greater than 0.20% is lower than 0.03% tin and is lower than 0.10% nickel;
The impurity that (ii) remains iron and produce by fusion;
(b) molten mass is formed the casting molten bath on the casting plane that is supported on a pair of cooling casting roller that has roll gap therebetween;
(c) the reverse rotation casting roll is lower than 10mm thick thin Cast Steel Plate to form by what roll gap extended downwards;
(d) at non-oxidizing atmosphere internal cooling Cast Steel Plate to being lower than 1080 ℃.
20. by the method for the described manufacturing high copper low alloy steel sheet of claim 19, wherein scaling index is at least 6.0, wherein
I＝26.01(％Cu)+3.88(％Ni)+1.20(％Cr)+1.49(％Si)+17.28(％P)-7.29(％Cu)(％Ni)-9.10(％Ni)(％P)-33.39(％Cu)
2。
21. by the method for the described manufacturing high copper low alloy steel sheet of claim 19, wherein total % weight of copper is between 0.2 and 2.0.
22. by the method for the described manufacturing high copper low alloy steel sheet of claim 19, wherein the thickness of Cast Strip steel is lower than 5mm.
23. by the method for the described manufacturing high copper low alloy steel sheet of claim 19, wherein thin Cast Strip steel thickness is lower than 2mm.
24. by the method for the described manufacturing high copper low alloy steel sheet of claim 19, wherein the % weight of sulphur is between 0.003 and 0.009.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US10/805,831 | 2004-03-22 | ||
| US10/805,831 US20050205169A1 (en) | 2004-03-22 | 2004-03-22 | High copper low alloy steel sheet |
| US11/084,649 | 2005-03-19 | ||
| US11/084,649 US20050205170A1 (en) | 2004-03-22 | 2005-03-19 | High copper low alloy steel sheet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1946867A true CN1946867A (en) | 2007-04-11 |
Family
ID=34993727
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2005800093541A Pending CN1946867A (en) | 2004-03-22 | 2005-03-21 | High copper low alloy steel sheet |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US20050205170A1 (en) |
| EP (1) | EP1727918A4 (en) |
| JP (1) | JP2007529630A (en) |
| KR (1) | KR20060130745A (en) |
| CN (1) | CN1946867A (en) |
| AU (1) | AU2005224290A1 (en) |
| RU (1) | RU2006137274A (en) |
| WO (1) | WO2005090627A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102325608A (en) * | 2009-02-20 | 2012-01-18 | 纽科尔公司 | Thin cast steel strip product of hot rolling and manufacturing approach thereof |
| CN109338235A (en) * | 2017-09-27 | 2019-02-15 | 江苏沙钢集团有限公司 | A kind of weathering steel and its production method |
| WO2021052426A1 (en) * | 2019-09-19 | 2021-03-25 | 宝山钢铁股份有限公司 | Thin-gauge and highly corrosion-resistant steel and production method therefor |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080264525A1 (en) * | 2004-03-22 | 2008-10-30 | Nucor Corporation | High copper low alloy steel sheet |
| US20070175608A1 (en) * | 2006-01-16 | 2007-08-02 | Nucor Corporation | Thin cast steel strip with reduced microcracking |
| WO2007079545A1 (en) * | 2006-01-16 | 2007-07-19 | Nucor Corporation | Thin cast steel strip with reduced microcracking |
| JP5352530B2 (en) * | 2010-05-24 | 2013-11-27 | 株式会社神戸製鋼所 | Method for estimating the corrosion state of steel |
| CN104057053B (en) * | 2013-06-14 | 2016-03-30 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of continuous cast method of low-alloy steel wide and thick slab |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994019503A1 (en) * | 1993-02-26 | 1994-09-01 | Nippon Steel Corporation | Thin cast piece of ordinary carbon steel containing large quantities of copper and tin, thin steel sheet, and method of production thereof |
| JPH07100593A (en) * | 1993-10-06 | 1995-04-18 | Nippon Steel Corp | Twin roll continuous casting method of cu and sn-containing steel |
| CA2163564C (en) * | 1994-03-25 | 2000-11-14 | Hiroyuki Nakashima | Process for producing thin cast strip |
| US5651412A (en) * | 1995-10-06 | 1997-07-29 | Armco Inc. | Strip casting with fluxing agent applied to casting roll |
| AUPN733095A0 (en) * | 1995-12-22 | 1996-01-25 | Bhp Steel (Jla) Pty Limited | Twin roll continuous caster |
| IT1290743B1 (en) * | 1997-04-10 | 1998-12-10 | Danieli Off Mecc | LAMINATION PROCESS FOR FLAT PRODUCTS WITH THIN THICKNESSES AND RELATED ROLLING LINE |
| JP4542247B2 (en) * | 2000-08-08 | 2010-09-08 | キャストリップ・リミテッド・ライアビリティ・カンパニー | Strip continuous casting apparatus and method of using the same |
| DE10042078A1 (en) * | 2000-08-26 | 2002-03-07 | Sms Demag Ag | Method and device for the continuous casting of steel strip from molten steel |
| US7591917B2 (en) * | 2000-10-02 | 2009-09-22 | Nucor Corporation | Method of producing steel strip |
| AU9505501A (en) * | 2000-10-04 | 2002-04-15 | James Hardie Res Pty Ltd | Fiber cement composite materials using cellulose fibers loaded with inorganic and/or organic substances |
| JP4411069B2 (en) * | 2001-09-13 | 2010-02-10 | エイケイ・スティール・プロパティーズ・インコーポレイテッド | Continuous casting of electromagnetic strips using controlled spray cooling. |
-
2005
- 2005-03-19 US US11/084,649 patent/US20050205170A1/en not_active Abandoned
- 2005-03-21 CN CNA2005800093541A patent/CN1946867A/en active Pending
- 2005-03-21 RU RU2006137274/02A patent/RU2006137274A/en not_active Application Discontinuation
- 2005-03-21 JP JP2007504210A patent/JP2007529630A/en not_active Withdrawn
- 2005-03-21 WO PCT/AU2005/000402 patent/WO2005090627A1/en active Application Filing
- 2005-03-21 EP EP05714274A patent/EP1727918A4/en not_active Withdrawn
- 2005-03-21 KR KR1020067021446A patent/KR20060130745A/en not_active Application Discontinuation
- 2005-03-21 AU AU2005224290A patent/AU2005224290A1/en not_active Abandoned
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102325608A (en) * | 2009-02-20 | 2012-01-18 | 纽科尔公司 | Thin cast steel strip product of hot rolling and manufacturing approach thereof |
| CN102325608B (en) * | 2009-02-20 | 2015-11-25 | 纽科尔公司 | Hot rolled thin cast steel strip product and manufacture method thereof |
| CN105215299A (en) * | 2009-02-20 | 2016-01-06 | 纽科尔公司 | Hot rolled thin cast steel strip product and manufacture method thereof |
| CN109338235A (en) * | 2017-09-27 | 2019-02-15 | 江苏沙钢集团有限公司 | A kind of weathering steel and its production method |
| WO2021052426A1 (en) * | 2019-09-19 | 2021-03-25 | 宝山钢铁股份有限公司 | Thin-gauge and highly corrosion-resistant steel and production method therefor |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2005090627A1 (en) | 2005-09-29 |
| US20050205170A1 (en) | 2005-09-22 |
| EP1727918A4 (en) | 2007-08-29 |
| RU2006137274A (en) | 2008-04-27 |
| AU2005224290A1 (en) | 2005-09-29 |
| JP2007529630A (en) | 2007-10-25 |
| EP1727918A1 (en) | 2006-12-06 |
| KR20060130745A (en) | 2006-12-19 |
| WO2005090627A9 (en) | 2005-11-17 |
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