CN104593699A - Welded steel pipe - Google Patents
Welded steel pipe Download PDFInfo
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- CN104593699A CN104593699A CN201410751116.9A CN201410751116A CN104593699A CN 104593699 A CN104593699 A CN 104593699A CN 201410751116 A CN201410751116 A CN 201410751116A CN 104593699 A CN104593699 A CN 104593699A
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Abstract
The invention provides a welded steel pipe, which is prepared by the method of: being a steel plate or steel strip into tubular, and conducting welding to obtain the welded steel pipe. The steel plate or steel strip includes the following components by mass: less than or equal to 0.12% of carbon, 0.20-0.40% of silicon, 0.35-0.65% of manganese, less than or equal to 0.030% of phosphorus, less than or equal to 0.020% of sulfur, 0.70-1.10% of chromium, 0.25-0.45% of copper, 0.04-0.10% of antimony, and the balance iron. According to the invention, the welding technology in the prior art is applied to the 09CrCuSb steel field to prepare the 09CrCuSb welded steel pipe. Relevant performance test is carried out on the 09CrCuSb welded steel pipe, and the result show that the comprehensive performance of the 09CrCuSb welded steel pipe is not lower than that of 09CrCuSb seamless steel pipes. Thus, the 09CrCuSb welded steel pipe provided by the invention fills the product blank of 09CrCuSb steel pipes and has the advantage of low manufacturing cost.
Description
Technical field
The present invention relates to a kind of steel pipe, be specifically related to a kind of 09CrCuSb Welded Steel Pipe, belong to Iron And Steel Industry technical field.
Technical background
The development of Iron And Steel Industry be unable to do without the support of aseptic technic, the particularly rotproofness of iron structure has become the key subjects paid close attention to the world today, and in a sense, the aseptic technic of steel ensures that structure iron normally uses the key condition with weather resistance.Therefore, the study hotspot that the strong ferrous materials of erosion resistance is all this area is all the time developed.
09CrCuSb steel, also known as ND steel, that optimal " low-temperature dew point corrosion of resistance to sulfuric acid " uses steel both at home and abroad at present, 09CrCuSb steel is widely used in and is manufactured on the appliance arrangements such as the economizer, air preheater, heat exchanger and the vaporizer that use in high sulfur-containing smoke gas, for resisting the condensation pitting attack of sulfur-containing smoke gas.In addition, 09CrCuSb steel also has the ability of anti-chlorine ion corrosion and high cost performance, and this makes 09CrCuSb steel can replace stainless steel completely, and in sulfuric acid dew point corrosion resistant, even also can surmount stainless steel becomes best corrosion resistant material.Visible, 09CrCuSb steel meets " green " idea and the national development policy of current efficient, long-lived, energy-saving and environmental protection, has great social utility value.09CrCuSb steel of the prior art is mainly subject to widespread use with the form of its weldless steel tube, but so far not yet about 09CrCuSb steel being made the relevant report of Welded Steel Pipe.Given this, because Welded Steel Pipe has the low advantage of cost than weldless steel tube, therefore, this area technical barrier urgently to be resolved hurrily has been become to the product developing of 09CrCuSb Welded Steel Pipe.
Summary of the invention
What the present invention solved is welded steel pipe-free problem in 09CrCuSb tube product, and 09CrCuSb weldless steel tube has the high problem of cost, and then provides a kind of 09CrCuSb Welded Steel Pipe with low cost.
The technical scheme that the present invention solves the problems of the technologies described above employing is:
A kind of Welded Steel Pipe, is prepared from by the following method:
Steel plate or steel band are curled into tubulose, and welding, namely obtains described Welded Steel Pipe;
The one-tenth of described steel plate or steel band is grouped into and comprises by percentage to the quality: carbon≤0.12%, silicon 0.20-0.40%, manganese 0.35-0.65%, phosphorus≤0.030%, sulphur≤0.020%, chromium 0.70-1.10%, copper 0.25-0.45%, antimony 0.04-0.10%, and surplus is iron.
The one-tenth of described steel plate or steel band is grouped into the aluminium also comprising < 0.03% by percentage to the quality, the tin of < 0.03%, the mixture of the rhenium of < 0.03% and the niobium-vanadium-titanium of < 0.10%.
Described steel plate or steel band process by adopting forging base or continuously cast bloom; Described steel is the killed steel by oxygen coverter or electrosmelting.
The condition of delivery of described steel plate or steel band is rolling, normalizing or as-annealed condition.
When described steel plate or steel band are delivered goods with as-normalized condition, meet the following conditions: the tensile strength of described steel plate or steel band is 390-550MPa, yield strength>=245MPa, elongation>=25%; Utilize the method in GB/T 232 to carry out pliability test to described steel plate or steel band, under the condition of specimen width=2 × sample thickness, Bend diameter=3 × sample thickness, 180 ° of cold-bending deformations of described steel plate or steel band are qualified; Under the condition of 68-72 DEG C, utilize the H of 50%
2sO
4solution soaks described steel plate or steel band, the erosion rate≤80g/ (m of described steel plate or steel band
2h).
The condition of delivery of described Welded Steel Pipe is normalizing or as-annealed condition.
The preparation method of described Welded Steel Pipe is: described annealed sheet steel or annealed band are bent to tubulose, obtains female pipe, carry out normalizing thermal treatment, obtain described Welded Steel Pipe at 800-1100 DEG C to described female pipe after welding.
Before described female pipe is heat-treated, described female pipe is processed into the production tube of different size, more described production tube is heat-treated; The technique of described processing comprise in hot rolling, cold-drawn or thermotension tube reducing one or more.
The mode of ratio-frequency welding or electric fusion welding is adopted to carry out described welding.
The weld seam of described Welded Steel Pipe is complete penetraction and fusion in welding structure.
Welded Steel Pipe of the present invention, by steel plate or steel band are curled into tubulose, welding, namely obtains described Welded Steel Pipe; And the raw material composition limiting described steel plate or steel band comprises by percentage to the quality: carbon≤0.12%, silicon 0.20-0.40%, manganese 0.35-0.65%, phosphorus≤0.030%, sulphur≤0.020%, chromium 0.70-1.10%, copper 0.25-0.45%, antimony 0.04-0.10%, surplus is iron.As preferred embodiment, the aluminium of < 0.03% is also added with in described raw material, the tin of < 0.03%, the mixture of the rare earth of < 0.03% and the niobium-vanadium-titanium of < 0.10%, to improve the over-all properties of Welded Steel Pipe further.The present invention also limits when described steel plate or steel band are delivered goods with as-normalized condition, need meet the following conditions: the tensile strength of described steel plate or steel band is 390-550MPa, yield strength>=245MPa, elongation>=25%; Utilize the method in GB/T 232 to carry out pliability test to described steel plate or steel band, under the condition of specimen width=2 × sample thickness, Bend diameter=3 × sample thickness, 180 ° of cold-bending deformations of described steel plate or steel band are qualified; Under the condition of 68-72 DEG C, utilize the H of 50%
2sO
4solution soaks described steel plate or steel band, the erosion rate≤80g/ (m of described steel plate or steel band
2h).
In addition, in order to improve over-all properties and the work-ing life of steel pipe, the condition of delivery that the present invention also limits described Welded Steel Pipe is further normalizing or as-annealed condition.Weldprocedure of the prior art is applied to 09CrCuSb rings territory by the present invention, thus prepared 09CrCuSb Welded Steel Pipe, and with reference to the regulation in GB/T28413, the tests such as room temperature tensile, bending, flattenings, enlarging, weld seam guided bend, macroscopic view and metallographic examination, surface quality, nondestructive testing, hydro-test, corrosion resistance nature have been carried out to the described Welded Steel Pipe that the present invention obtains, result shows that the over-all properties of Welded Steel Pipe of the present invention is not less than the 09CrCuSb weldless steel tube specified in NB/T 47019.As can be seen here, the product that Welded Steel Pipe of the present invention has filled up 09CrCuSb Welded Steel Pipe is blank, and Welded Steel Pipe of the present invention has advantage cheap for manufacturing cost.
Embodiment
Below in conjunction with specific embodiment, Welded Steel Pipe provided by the invention is described in detail.
Embodiment 1
Welded Steel Pipe described in the present embodiment, is prepared from by the following method:
Adopt forging base to heat rolling annealing coiled sheet is starting material, is bent to tubulose, and ratio-frequency welding makes the mother's pipe being of a size of Ф 60*5, then is Ф 38*5 through thermotension tube reducing, carries out normalizing thermal treatment, namely obtain described Welded Steel Pipe at 900 DEG C.
Described raw-material one-tenth is grouped into and comprises by percentage to the quality: carbon 0.12%, silicon 0.20%, manganese 0.65%, phosphorus 0.010%, sulphur 0.015%, chromium 0.70%, copper 0.45%, antimony 0.10%, and surplus is iron.
Embodiment 2
Welded Steel Pipe described in the present embodiment, is prepared from by the following method:
Adopt continuously cast bloom normalizing coiled sheet to be starting material, bent to tubulose, the mother's pipe being of a size of Ф 114*8 is made in melting, weld seam complete penetraction and fusion in welding; Carry out normalizing thermal treatment at 950 DEG C, namely obtain described Welded Steel Pipe.
Described raw-material one-tenth is grouped into and comprises by percentage to the quality: carbon 0.10%, silicon 0.40%, manganese 0.35%, phosphorus 0.030%, sulphur 0.020%, chromium 1.10%, copper 0.25%, antimony 0.04%, and surplus is iron.
The tensile strength of the coiled sheet of normalizing described in the present embodiment is 500MPa, and yield strength is 350MPa, and elongation is 30%; Utilize the method in GB/T 232 to carry out pliability test to described normalizing coiled sheet, under the condition of specimen width=2 × sample thickness, Bend diameter=3 × sample thickness, 180 ° of cold-bending deformations of described normalizing coiled sheet are qualified; Under the condition of 70 DEG C, utilize the H of 50%
2sO
4solution soaks described normalizing coiled sheet, and the erosion rate of described normalizing coiled sheet is 70g/ (m
2h).
Embodiment 3
Welded Steel Pipe described in the present embodiment, is prepared from by the following method:
Adopt continuously cast bloom to heat rolling annealing coiled sheet is starting material, is bent to tubulose, and ratio-frequency welding is made and is of a size of Ф 60*5 mother pipe; It is Ф 38*5 that temperature control carries out thermotension tube reducing to 800-1100 DEG C, namely obtains described Welded Steel Pipe.
Described raw-material one-tenth is grouped into and comprises by percentage to the quality: carbon 0.06%, silicon 0.30%, manganese 0.50%, phosphorus 0.02%, sulphur≤0.01%, chromium 0.90%, copper 0.35%, antimony 0.07%, aluminium 0.02%, tin 0.01%, rhenium 0.015%, the mixture 0.08% of niobium-vanadium-titanium, surplus is iron.
In dimensional parameters Ф X*Y in above-described embodiment, X represents the diameter of pipe, and Y represents the wall thickness of pipe.
Experimental example
According to following standard test methods, Welded Steel Pipe described in embodiment of the present invention 1-3 is carried out to the performance tests such as tensile test at room temperature, squeezing test, flaring test, weld seam guided bend test, macroscopic view and metallographic examination, hydro-test, shock test, cold bending test, surface quality testing, nondestructive testing, anti-corrosion test, result shows, the over-all properties of Welded Steel Pipe of the present invention is not less than the 09CrCuSb weldless steel tube of regulation in NB/T 47019.Wherein every test method is:
Component analyzing method: GB/T4336, GB/T222 or GB/T223
Tensile test at room temperature: GB/T228.1
Squeezing test: GB/T 246
Flaring test: GB/T 242
Weld seam guided bend test: GB/T 232
Macroscopic view and metallographic examination: GB/T 13298
Hydro-test: GB/T 241
Shock test: GB/T229
Cold bending test: GB/T 232
Anti-corrosion test: JB/T7901
Obviously, above-described embodiment is only for clearly example being described, and the restriction not to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all embodiments.And thus the apparent change of extending out or variation be still among the protection domain of the invention.
Claims (10)
1. a Welded Steel Pipe, is characterized in that, is prepared from by the following method:
Steel plate or steel band are curled into tubulose, and welding, namely obtains described Welded Steel Pipe;
The one-tenth of described steel plate or steel band is grouped into and comprises by percentage to the quality: carbon≤0.12%, silicon 0.20-0.40%, manganese 0.35-0.65%, phosphorus≤0.030%, sulphur≤0.020%, chromium 0.70-1.10%, copper 0.25-0.45%, antimony 0.04-0.10%, and surplus is iron.
2. Welded Steel Pipe according to claim 1, it is characterized in that, the one-tenth of described steel plate or steel band is grouped into the aluminium also comprising < 0.03% by percentage to the quality, the tin of < 0.03%, the mixture of the rhenium of < 0.03% and the niobium-vanadium-titanium of < 0.10%.
3. Welded Steel Pipe according to claim 1 and 2, is characterized in that, described steel plate or steel band process by adopting forging base or continuously cast bloom; Described steel is the killed steel by oxygen coverter or electrosmelting.
4., according to the arbitrary described Welded Steel Pipe of claim 1-3, it is characterized in that, the condition of delivery of described steel plate or steel band is rolling, normalizing or as-annealed condition.
5. Welded Steel Pipe according to claim 4, is characterized in that, when described steel plate or steel band are delivered goods with as-normalized condition, meets the following conditions: the tensile strength of described steel plate or steel band is 390-550MPa, yield strength>=245MPa, elongation>=25%; Utilize the method in GB/T 232 to carry out pliability test to described steel plate or steel band, under the condition of specimen width=2 × sample thickness, Bend diameter=3 × sample thickness, 180 ° of cold-bending deformations of described steel plate or steel band are qualified; Under the condition of 68-72 DEG C, utilize the H of 50%
2sO
4solution soaks described steel plate or steel band, the erosion rate≤80g/ (m of described steel plate or steel band
2h).
6., according to the arbitrary described Welded Steel Pipe of claim 1-3, it is characterized in that, the condition of delivery of described Welded Steel Pipe is normalizing or as-annealed condition.
7. Welded Steel Pipe according to claim 6, it is characterized in that, the preparation method of described Welded Steel Pipe is: described annealed sheet steel or annealed band are bent to tubulose, obtains female pipe after welding, at 800-1100 DEG C, normalizing thermal treatment is carried out to described female pipe, obtain described Welded Steel Pipe.
8. Welded Steel Pipe according to claim 5, is characterized in that, before heat-treating described female pipe, described female pipe is processed into the production tube of different size, then heat-treats described production tube; The technique of described processing comprise in hot rolling, cold-drawn or thermotension tube reducing one or more.
9. according to the arbitrary described Welded Steel Pipe of claim 1-8, it is characterized in that, adopt the mode of ratio-frequency welding or electric fusion welding to carry out described welding.
10., according to the arbitrary described Welded Steel Pipe of claim 1-9, it is characterized in that, the weld seam of described Welded Steel Pipe is complete penetraction and fusion in welding structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410751116.9A CN104593699A (en) | 2014-12-09 | 2014-12-09 | Welded steel pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410751116.9A CN104593699A (en) | 2014-12-09 | 2014-12-09 | Welded steel pipe |
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| Publication Number | Publication Date |
|---|---|
| CN104593699A true CN104593699A (en) | 2015-05-06 |
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ID=53119747
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410751116.9A Pending CN104593699A (en) | 2014-12-09 | 2014-12-09 | Welded steel pipe |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111058037A (en) * | 2019-12-31 | 2020-04-24 | 杭州彰钰不锈钢有限公司 | Corrosion-resistant stainless steel pipe and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1490427A (en) * | 2003-05-08 | 2004-04-21 | 朱忠亚 | Low alloy steel-09CrCuSb (ND steel) for sulfuric acid proof dew point corrosive seamless steel pipe |
| JP4267320B2 (en) * | 2002-12-26 | 2009-05-27 | 新日本製鐵株式会社 | Manufacturing method of unidirectional electrical steel sheet |
| CN102527767A (en) * | 2011-11-22 | 2012-07-04 | 玛切嘉利（中国）有限责任公司 | Cold drawing welded tube manufacture process for high-accuracy hydraulic oil cylinder |
-
2014
- 2014-12-09 CN CN201410751116.9A patent/CN104593699A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4267320B2 (en) * | 2002-12-26 | 2009-05-27 | 新日本製鐵株式会社 | Manufacturing method of unidirectional electrical steel sheet |
| CN1490427A (en) * | 2003-05-08 | 2004-04-21 | 朱忠亚 | Low alloy steel-09CrCuSb (ND steel) for sulfuric acid proof dew point corrosive seamless steel pipe |
| CN102527767A (en) * | 2011-11-22 | 2012-07-04 | 玛切嘉利（中国）有限责任公司 | Cold drawing welded tube manufacture process for high-accuracy hydraulic oil cylinder |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111058037A (en) * | 2019-12-31 | 2020-04-24 | 杭州彰钰不锈钢有限公司 | Corrosion-resistant stainless steel pipe and preparation method thereof |
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Application publication date: 20150506 |