CN109082601A - A kind of acid-resisting corrosion X70MS line steel hot rolling roll bending and its manufacturing method - Google Patents
A kind of acid-resisting corrosion X70MS line steel hot rolling roll bending and its manufacturing method Download PDFInfo
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- CN109082601A CN109082601A CN201811020840.9A CN201811020840A CN109082601A CN 109082601 A CN109082601 A CN 109082601A CN 201811020840 A CN201811020840 A CN 201811020840A CN 109082601 A CN109082601 A CN 109082601A
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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
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0226—Hot rolling
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
- C22C33/06—Making ferrous alloys by melting using master 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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- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
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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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
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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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
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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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
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- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
The present invention provides a kind of acid-resisting corrosion X70MS line steel hot rolling roll bending and its manufacturing method, by mass percentage includes following ingredient, C:0.03~0.10%；Mn:1.10~1.40%；Si:0.10~0.20%；Al:0.010~0.030%；Cr:0.15~0.55%；Mo:0.15~0.45%；Ti:0.005~0.025%；Nb:0.050~0.080%；V:0.020~0.040%；Ni:0.15~0.30%；B≤0.0002%；P≤0.012%；S≤0.0020%；N≤0.0060%；O≤0.0018%；H≤0.0005%；Surplus is Fe and inevitable field trash；The antiacid corroded pipeline steel X70MS product composition and mechanical property meet API 5L standard, acid resistance corrosive nature meets hic resistance in the world and the requirement of anti-SSCC relevant criterion, and there is good welding technological properties, meet oil and gas pipeline manufacture material requirement.
Description
Technical field
The present invention relates to metal smelt fields, and in particular to a kind of acid-resisting corrosion X70MS line steel hot rolling roll bending and its
Manufacturing method.
Background technique
For antiacid corroded pipeline steel mainly for delivery of the oil-gas pipeline for being rich in acid medium, major demands are export-oriented in
The ground such as state southwest oil gas field gathering line, with the increase of petrol resources exploitation amount, world's oil gas quality is in recent years
Downward trend, Cl in oil gas-、SO4 2-Equal salt contents and CO2, the amount of acidic substances such as sulfide increase, while super large caliber,
The utilization of high-pressure delivery technology, the corrosion of pipe line steel fluid scouring aggravate with corrosion fatigue, this is just to the intensity of pipe line steel and corrosion resistant
More stringent requirements are proposed for corrosion, while the requirement to the technical level of steel mill, production equipment level is more stringent, development difficulty
It is bigger.
Influence the common acid-resisting corrosion anti-H of X70MS pipe line steel2The principal element of S corrosion is still not clear, by a large amount of real
It tests, researchs and analyses H2S corrosion and the pass of the second phase hard phase and segregation in alloying component, institutional framework, banded structure, steel
System, resistance to H of the discovery banded structure to pipe line steel2S corrosion impact is larger, and common X70 level pipeline pipeline steel is under acid medium environment
It is on active service, it may appear that hydrogen induced cracking cracking and stress corrosion cracking；High level anticorrosive pipe line steel need to add a large amount of Cu,
Cr, Ni member usually improve the corrosion resistance of steel, cause the increase of cost of alloy, it is therefore desirable to optimize acid-resisting corrosion
The ingredient of X70MS pipe line steel designs, and improves the ingredient of element in steel, saves cost of alloy, while improving the smelting process of molten steel,
The degree of purity of molten steel is improved, microstructure segregation is reduced, and makes acid-resisting corrosion X70MS pipe line steel acid-resisting corrosion energy with higher
Power.
Summary of the invention
Technical assignment of the invention is to be directed to the above the deficiencies in the prior art, and provide a kind of acid-resisting corrosion X70MS pipe
Line steel hot-rolled coil and its manufacturing method, the antiacid corroded pipeline steel X70MS product composition and mechanical property meet API 5L mark
Quasi-, acid resistance corrosive nature meets hic resistance in the world and the requirement of anti-SSCC relevant criterion, and has good welding usability
Can, meet oil and gas pipeline manufacture material requirement.
One aspect of the present invention provides a kind of acid-resisting corrosion X70MS line steel hot rolling roll bending, includes by mass percentage
Following ingredient, C:0.03~0.10%；Mn:1.10~1.40%；Si:0.10~0.20%；Al:0.010~0.030%；
Cr:0.15~0.55%；Mo:0.15~0.45%；Ti:0.005~0.025%；Nb:0.050~0.080%；V:0.020
~0.040%；Ni:0.15~0.30%；B≤0.0002%；P≤0.012%；S≤0.0020%；N≤0.0060%； O
≤ 0.0018%；H≤0.0005%；Surplus is Fe and inevitable field trash.
Another aspect of the present invention additionally provides a kind of manufacturing method of acid-resisting corrosion X70MS line steel hot rolling roll bending,
Preparation process flow are as follows: molten iron pretreatment → converter smelting → external refining → continuous casting → heating → roughing, finish rolling → control are cold
But → batch, and including following operating procedure:
In refining procedure, calcareous processing is carried out after RH processing, the soft blow time is 15~20min, is pressed from both sides in strict control molten steel
Sundries, it is as follows that nonmetallic inclusionsin steel rank limits requirement；
In continuous casting working procedure, overall process uses molding casting, and the middle packet degree of superheat requires≤30 DEG C；
In heating process, 1180 DEG C ± 20 DEG C of board briquette are controlled；
In roughing, finishing rolling step, workpiece thickness 60mm；Entry temperature at finishing≤980 DEG C；Exit temperature at finishing target
820℃；400 DEG C of coiling temperature target.
Further, it in hot metal pre process procedures, pre-processes into furnace S≤0.003%.
Further, in converter procedure, ladle Als is by 0.005~0.015% control；It is required that ladle N≤25ppm.
Further, N≤0.0035% is controlled in refining procedure.
The operating procedure being not directed in the manufacturing method of the present invention is routine operation.
Compared with the prior art, the advantages of the present invention are as follows:
(1) in ingredient design, common pipe line steel other compared to ad eundem using low C, low Mn, without the design of Cu, and adds
Add a small amount of Cr, Mo, Ni alloying element, indices reach requirement in mechanical property；Wherein the design of the low Mn of low C can be reduced
Segregation in steel, and carbon equivalent is reduced, the weldability of steel is improved, Nb, V, Ti element is added and promotes crystal grain refinement, is improving intensity
While, improve the toughness of steel；The low S control of low O, reduces field trash, improves toughness plasticity；Cr, Ni element is added to be conducive to slow down
H2S corrosion, improves hic resistance ability, while Cr, Mo element also improve the harden ability of steel, to form the bayesian of fine structure
Body and acicular ferrite.
(2) it under the premise of largely not adding corrosion-resistant element, by controlling the degree of purity of molten steel, reduces inside steel
Segregation can obtain good hic resistance and anti-SSCC performance, and corrosion resistance test result is better than domestic other steel mills, produces
Product competitiveness is higher, has good economic benefit.
(3) the antiacid corroded pipeline steel of X70MS of the technique production provided through the invention, every mechanical property meet index
Reach requirement, and corrosion resistance test result is better than domestic other steel mills.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that described herein, specific examples are only used to explain the present invention, is not used to limit
The fixed present invention.
The present invention provides a kind of acid-resisting corrosion X70MS line steel hot rolling roll bending, by mass percentage, including such as the following group
Point: C:0.03~0.10%；Mn:1.10~1.40%；Si:0.10~0.20%；Al:0.010~0.030%；Cr:0.15~
0.55%；Mo:0.15~0.45%；Ti:0.005~0.025%；Nb:0.050~0.080%；V:0.020~0.040%；
Ni:0.15~0.30%；B≤0.0002%；P≤0.012%；S≤0.0020%；N≤0.0060%；O≤0.0018%；H
≤ 0.0005%；Surplus is Fe and inevitable field trash.
Acid-resisting corrosion X70MS pipe line steel will obtain good comprehensive performance, must be requested that molten steel has good pure
Degree and lower C content reduce segregation and field trash of the molten steel in process of setting, simultaneously because the quality of the H in pipe line steel point
Number is higher, and the probability that HIC is generated is bigger, and rate of corrosion is higher, it is therefore necessary to strict control H content.
The component of embodiment 1,2,3 is as shown in table 1, and surplus is Fe and inevitable field trash, preparation process flow are as follows:
Molten iron pretreatment → converter smelting → external refining → continuous casting → (2300 hot rolling) heating → roughing, finish rolling → control is cooling →
It batches, concrete operations are as follows:
One, it makes steel
1, material process
It pre-processes into furnace S≤0.003%, scratches clean slag；Using fine fodder steel scrap.
2, ladle process
It is required that red tank is by steel；Ensure permeability of ladle, the certainly property poured；Ladle is cleaned without residual steel, residue；Ladle use will consider
Feed calcium.
3, converter procedure
Converter catch carbon hit at first time avoids a little blowing；Tapping uses low-carbon low-phosphor manganese iron, ferrosilicon, molybdenum-iron, high-chromium alloy；
Ladle argon gas purging before tapping, control tapping hole avoid diffusing, and ladle Als is by 0.005~0.015% control；It is required that in ladle
N≤25ppm, slag-stopping tapping, strict control enter the quantity of slag in ladle.
4, refining procedure
It is required that LF treatment process keeps micro-positive pressure, strict control LF increases N, it is desirable that increases N amount≤10ppm；LF is using active stone
Ash, fluorite make the reducing slag of good fluidity, and strict control Argon intensity avoids molten steel exposed as far as possible；It is carried out after RH processing calcareous
Processing, soft blow time are 15~20min, and strict control inclusion content in melting steel, nonmetallic inclusionsin steel rank, which limits, to be required such as
Table 2；Refining front and back takes gas sample to be N, O, H content analysis, controls N content≤0.0035%.
5, continuous casting working procedure
Whole process carries out molding casting, and gas sample is taken to analyze N, O, H.It opens using being wrapped in argon gas purging before pouring, casting process is done
Exposed to no molten steel, N is inhaled at the strict control mouth of a river, and control increases N≤5ppm；Using cinder inclusion in high alkalinity, so as to steel inclusion
Removal；Steel pouring process puts into soft press function；Steel pouring process keeps permanent pulling rate；Middle packet is controlled by the degree of superheat≤30 DEG C；Slab is complete
Subordinate's line, it is cold using heap, guarantee slab slow cooling, crosses and roll after 72 hours.
Two, hot rolling
1, slab and heating region
1160~1200 DEG C of slab tapping temperature.Heating furnace oven cavity atmosphere is controlled, the generation of slab iron scale is reduced, is protected
It is uniform to demonstrate,prove heating temperature.
2, famine rolls, finish rolling, batches region
Famine rolls workpiece thickness 60mm；The sharing of load of finish rolling model is carried out, guarantees rolling stability；Entry temperature at finishing
≤980℃；820 DEG C of exit temperature at finishing target；400 DEG C of coiling temperature target.Before refrigerating mode is all put into using first 5 groups
Section continuous coo1ing mode.Guarantee finish to gauge, the accurate control of coiling temperature.
The antiacid corroded pipeline steel of X70MS that embodiment 1,2,3 is produced according to the method, performance indexes all meet skill
Art standard requirements, especially acidresistant property are excellent, far superior to similar product on the market, and antiacid Corrosion standards require and state
The hic resistance inspection data comparison of certain interior steel mill, the present embodiment product is detailed in the following table 3 (crack length rate CLR, crack-sensitivity rate
The lower CSR, crack thickness rate CTR standard requirements the better).
The antiacid corroded pipeline composition of steel table/% of 1 embodiment X70MS of table
2 non-metallic inclusion rank of table limits
3 hic resistance inspection data of table
The above description is only an embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure or equivalent flow shift made by bright description is applied directly or indirectly in other relevant technology necks
Domain is included within the scope of the present invention.
Claims (5)
1. a kind of acid-resisting corrodes X70MS line steel hot rolling roll bending, it is characterised in that: it by mass percentage include following ingredient,
C:0.03~0.10%；Mn:1.10~1.40%；Si:0.10~0.20%；Al:0.010~0.030%；Cr:0.15~
0.55%；Mo:0.15~0.45%；Ti:0.005~0.025%；Nb:0.050~0.080%；V:0.020~0.040%；
Ni:0.15~0.30%；B≤0.0002%；P≤0.012%；S≤0.0020%；N≤0.0060%；O≤0.0018%；H
≤ 0.0005%；Surplus is Fe and inevitable field trash.
2. a kind of manufacturing method of acid-resisting corrosion X70MS line steel hot rolling roll bending as described in claim 1, preparation flow
Are as follows: molten iron pretreatment → converter smelting → external refining → continuous casting → heating → roughing, finish rolling → control cool down → are batched, special
Sign is: and including following operating procedure:
In refining procedure, calcareous processing is carried out after RH processing, the soft blow time is 15~20min, strict control inclusion content in melting steel,
It is as follows that nonmetallic inclusionsin steel rank limits requirement；
In continuous casting working procedure, overall process uses molding casting, and the middle packet degree of superheat requires≤30 DEG C；
In heating process, 1180 DEG C ± 20 DEG C of board briquette are controlled；
In roughing, finishing rolling step, workpiece thickness 60mm；Entry temperature at finishing≤980 DEG C；820 DEG C of exit temperature at finishing target；
400 DEG C of coiling temperature target.
3. a kind of manufacturing method of acid-resisting corrosion X70MS line steel hot rolling roll bending according to claim 2, feature exist
In: in hot metal pre process procedures, pre-process into furnace S≤0.003%.
4. a kind of manufacturing method of acid-resisting corrosion X70MS line steel hot rolling roll bending according to claim 2, feature exist
In: in converter procedure, ladle Als is by 0.005~0.015% control；It is required that N≤25ppm in ladle.
5. a kind of manufacturing method of acid-resisting corrosion X70MS line steel hot rolling roll bending according to claim 2, feature exist
In: N≤0.0035% is controlled in refining procedure.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110205548A (en) * | 2019-06-20 | 2019-09-06 | 本钢板材股份有限公司 | A kind of drying of wood tank body special-purpose steel of resistance to polynary acid corrosion and preparation method thereof |
| CN110846553A (en) * | 2019-09-27 | 2020-02-28 | 邯郸钢铁集团有限责任公司 | Rich in H2Low-yield-ratio corrosion-resistant pipeline steel strip for S environment and production method thereof |
| CN111041147A (en) * | 2019-12-18 | 2020-04-21 | 唐山中厚板材有限公司 | Method for controlling B-type inclusions in pipeline steel |
| CN111270135A (en) * | 2020-02-17 | 2020-06-12 | 本钢板材股份有限公司 | Economical weathering steel produced by strengthening RE-P and preparation process thereof |
| CN111270137A (en) * | 2020-02-17 | 2020-06-12 | 本钢板材股份有限公司 | Acid corrosion resistant pipeline steel X52MS hot-rolled coil and preparation method thereof |
| CN111793776A (en) * | 2020-03-31 | 2020-10-20 | 本钢板材股份有限公司 | Acid corrosion resistant X65MS pipeline steel hot-rolled coil and preparation method thereof |
| CN112195409A (en) * | 2020-09-30 | 2021-01-08 | 首钢集团有限公司 | High-strength low-hardness hydrogen sulfide corrosion resistant steel and preparation method thereof |
| CN114381664A (en) * | 2021-12-22 | 2022-04-22 | 南阳汉冶特钢有限公司 | Production method of thick X80MS steel plate for corrosion-resistant pipeline |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110205548A (en) * | 2019-06-20 | 2019-09-06 | 本钢板材股份有限公司 | A kind of drying of wood tank body special-purpose steel of resistance to polynary acid corrosion and preparation method thereof |
| CN110846553A (en) * | 2019-09-27 | 2020-02-28 | 邯郸钢铁集团有限责任公司 | Rich in H2Low-yield-ratio corrosion-resistant pipeline steel strip for S environment and production method thereof |
| CN111041147A (en) * | 2019-12-18 | 2020-04-21 | 唐山中厚板材有限公司 | Method for controlling B-type inclusions in pipeline steel |
| CN111270135A (en) * | 2020-02-17 | 2020-06-12 | 本钢板材股份有限公司 | Economical weathering steel produced by strengthening RE-P and preparation process thereof |
| CN111270137A (en) * | 2020-02-17 | 2020-06-12 | 本钢板材股份有限公司 | Acid corrosion resistant pipeline steel X52MS hot-rolled coil and preparation method thereof |
| CN111793776A (en) * | 2020-03-31 | 2020-10-20 | 本钢板材股份有限公司 | Acid corrosion resistant X65MS pipeline steel hot-rolled coil and preparation method thereof |
| CN112195409A (en) * | 2020-09-30 | 2021-01-08 | 首钢集团有限公司 | High-strength low-hardness hydrogen sulfide corrosion resistant steel and preparation method thereof |
| CN114381664A (en) * | 2021-12-22 | 2022-04-22 | 南阳汉冶特钢有限公司 | Production method of thick X80MS steel plate for corrosion-resistant pipeline |
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Application publication date: 20181225 |