CN106756470A - The preparation method of transmission tower weathering steel under a kind of rural atmosphere - Google Patents
The preparation method of transmission tower weathering steel under a kind of rural atmosphere Download PDFInfo
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- CN106756470A CN106756470A CN201510834931.6A CN201510834931A CN106756470A CN 106756470 A CN106756470 A CN 106756470A CN 201510834931 A CN201510834931 A CN 201510834931A CN 106756470 A CN106756470 A CN 106756470A
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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
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
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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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Abstract
The application provides a kind of preparation method of transmission tower weathering steel under rural atmosphere, its weather-proof composition of steel of optimization, using high temperature soak, high-temperature final rolling and high temperature coiling and the preparation method of controlled rolling and controlled cooling, produce a kind of low cost, pollute small, preparation process is simple, the weathering steel of high-strength corrosion-resistant corrosion energy.Its financial cost is than conventional weathering steel low cost 20%~30%；Preparation technology and required equipment are simple；And with excellent corrosion resistance；Weathering steel prepared by the present invention can be promoted the use of in extra-high voltage project in industry of transmitting electricity, and effective energy-saving and emission-reduction have remarkable effect to reducing the cost of raw material and shaft tower later period maintenance cost.
Description
Technical field
The present invention relates to a kind of preparation method of weathering steel, specifically, it is related to be transmitted electricity under a kind of rural atmosphere
The preparation method of shaft tower weathering steel.
Background technology
The deep-etching gas such as sulfide, oxynitrides of industrial gas emission, heavy corrosion is chronically exposed to greatly
Iron tower of power transmission line among gas, every two years needs to carry out a preservative treatment, not only high cost to it, but also
Need to be had a power failure treatment, and economic loss is serious.
In the exploitation of weather resisting steel, domestic and international common practice is that a certain amount of anti-corrosion element is added in steel,
Such as Cr, Ni, Mo, Cu, while reducing hazardous elements S content in steel as far as possible.The corrosion resistance of steel is basic
It is that above-mentioned anti-corrosion element works, but above-mentioned alloying element is expensive, particularly Ni, Mo etc. increased
The weathering steel cost of raw material.Additionally, electric power line pole tower is also using aseptic technics such as galvanizings, and galvanizing is anti-
Corruption needs the operation such as rust cleaning, pickling, zinc-plated, and investment is big, and this process contamination is serious.Because zinc liquid need to be heated to
450 DEG C, discharge pernicious gas, harm people's health；Especially Cr in Zincing passivation solution6+, to human body and ring
There is very big harm in border, not environmentally；Meanwhile, it is zinc-plated to increased steel tower manufacturing cost；Additionally, rotten in industrial atmosphere
Under erosion environment, the life-span of zinc coat is general at 10 years or so, less than circuit service life, in circuit running
In still need to carry out Corrosion Maintenance using modes such as brushing corrosion resistant coatings.Though Aplataer process is improving coating anti-corrosion life side
Face obtains certain effect, but due to high cost, technology is immature the shortcomings of all do not promoted on a large scale
Using.
Accordingly, it is desirable to provide it is a kind of be applied to electric power line pole tower long-effective corrosion, technical, better economy and
The small high-strength weathering steel of environmental pollution, to extend the anti-corrosion life of electric power line pole tower, reduces transmission line of electricity bar
The anti-corrosion operating cost of tower.
The content of the invention
The purpose of the present invention is to overcome that the above-mentioned prior art weathering steel cost of raw material is high, hot galvanized layer preparation section
The aspect problem, a kind of rural atmosphere ring of proposition such as complicated and later stage Corrosion Maintenance is costly, environmental pollution is serious
The preparation method of transmission tower weathering steel under border, its weather-proof composition of steel of optimization, using high temperature soak, high temperature end
The preparation method with high temperature coiling and controlled rolling and controlled cooling is rolled, small, preparation technology is simple to produce a kind of low cost, pollution
Single, high-strength corrosion-resistant corrosion energy weathering steel.
To achieve the above object, the present invention uses following technical scheme：
Transmission tower weathering steel under a kind of rural atmosphere, the weathering steel is by under by weight percentage
Row component is prepared from：C, 0.05~0.10%；Si, 0.50~1.0%；Mn, 1.0~1.8%；P, 0.01~0.02%；
S ,≤0.003%；Al, 0.4~0.9%；N ,≤0.003%；O ,≤0.003%；Balance of Fe and micro miscellaneous
Matter.
Preferably, weathering steel is prepared from by following component by weight percentage：C, 0.05~0.07%；
Si, 0.60~0.9%；Mn, 1.2~1.6%；P, 0.011~0.013%；S ,≤0.003%；Al, 0.6~0.9%；
N ,≤0.003%；O ,≤0.003%；Balance of Fe and trace impurity.
Preferably, weathering steel is prepared from by following component by weight percentage：C, 0.06%；Si, 0.83%；
Mn, 1.3%；P, 0.013%；S, 0.002%；Al, 0.81%；N, 0.003%；O, 0.001%；It is remaining
Measure is Fe and trace impurity.
Further, under a kind of rural atmosphere transmission tower weathering steel method, comprise the steps：
1) converter or electric furnace smelting；2) LF refining or RH application of vacuum；3) continuous casting；4) high-temperature heating
Stove heat；5) roughing；6) high temperature finish rolling；7) cool down；8) high temperature coiling is coiled.
Further, step 4) include：By heating strand to 1250~1300 DEG C；By weathering steel effective thickness
Determine soaking time, 1.8min/mm；Step 5) and step 6) in, weathering steel workpiece thickness is into
6~8 times of product thickness, wherein, 1000~1050 DEG C of entry temperature at finishing, 950 DEG C of finishing temperature；
Further, step 7) it is middle using section cooling mode；Step 8) include：580~625 DEG C, batch
One hour air cooling is incubated afterwards to get product.
In the present invention described below the reasons why chemical composition limited amount：
C content selection of the invention is 0.05~0.10%.C is most basic intensified element in steel, can improve strong
Degree, but C increases the weldability and toughness of influence steel.
Si contents selection of the invention is 0.50~1.0%.Si is solution strengthening element, can improve intensity；Together
When SiO can be generated under atmospheric corrosion environment2, play corrosion-resistant effect.
Mn contents selection of the invention is 1.0~1.8%.Mn is solution strengthening element, can improve intensity and
Toughness.
P content selection of the invention is 0.01~0.02%.P is unfavorable to welding, and with cold brittleness, belongs in steel
Harmful element；In the present invention, P content is generally higher than straight carbon steel, because P is effective corrosion-resistant element, P
Amount increases, and to improving corrosion resistance of steel energy effect is significant, in order to increase corrosion resistance, the content control of P exists
0.01~0.02%.
Al content selection of the invention is 0.4~0.9%.Al has crystal grain thinning and invigoration effect, the present invention
Al amounts are higher, and are more than 50 times of general carbon weathering steel content, because Al has Grain refinement, refinement
Crystal grain can improve hardness of steel and toughness；Additionally, in atmosphere, Al can form Al in rusty scale2O3, Al2O3
Can prevent steel substrate from further aoxidizing, with corrosion-resistant effect；The addition of Al elements, instead of traditional steel
The precious metal such as Cr, Ni and Cu, reduces cost, promote the use of to weathering steel in material, with important meaning
Justice.
With immediate prior art ratio, the present invention provide technical scheme there is following excellent effect：
1st, financial cost is relatively low, than conventional weathering steel low cost 20%~30%.High content is added in the weathering steel
Si and Al, substitutes noble element Cr, Ni, Cu etc., significantly reduces cost.
2nd, preparation technology and required equipment are simple.The present invention is smelted and steel rolling equipment using conventional, and Hot-roller
Skill is simple and feasible, and major part industrial production line can be produced in existing equipment at present.
3rd, application prospect is extensive.Weathering steel prepared by the present invention can be used in transmission of electricity industry large-scale promotion, especially
It is in rural environments field；China's transmission line of electricity 80% is in rural field locations, and it is used on a large scale, right
Reducing the cost of raw material and shaft tower later period maintenance cost has remarkable effect.
Brief description of the drawings
In order to illustrate more clearly of the technical scheme in the present invention, below will be attached to what is used needed for embodiment
Figure is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention,
For those of ordinary skill in the art, on the premise of not paying creative work, can also be according to these
Accompanying drawing obtains other accompanying drawings.
Fig. 1 1~5# of embodiment weathering steels change over time rule figure in Wuhan suburb corrosion rate；
Fig. 2 1~5# of embodiment weathering steels change over time rule figure in Bei Jingliang townshiies suburb corrosion rate；
In figure：Q420, traditional weathering steel.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out it is clear,
It is fully described by, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole
Embodiment.Based on the embodiment in the present invention, the every other implementation that those of ordinary skill in the art are obtained
Example, belongs to the scope of protection of the invention.
Embodiment 1
Weathering steel of the present invention is prepared from by following component by weight percentage：C, 0.05%；Si, 0.60%；
Mn, 1.4%；P, 0.012%；S, 0.002%；Al, 0.42%；N, 0.0030%；O, 0.002%；
Balance of Fe and trace impurity.
Weathering steel step of preparation process is as follows：
1) converter or electric furnace smelting；2) LF refining or RH application of vacuum；3) continuous casting；4) high-temperature heating
Stove heat：By heating strand to 1270 DEG C, soaking time presses weathering steel effective thickness 1.8min/mm controls,
Initial slab thickness is 60mm, and soaking time is 108min；5) roughing：Weathering steel workpiece thickness is
8 times of finished product thickness (20mm)；6) high temperature finish rolling：Weathering steel workpiece thickness is finished product thickness (20mm)
8 times, wherein, 1020 DEG C of entry temperature at finishing, 950 DEG C of finishing temperature；7) cool down：Section cooling；8)
High temperature coiling is coiled：600 DEG C of coiling temperature, is incubated one hour air cooling and gets product after high temperature coiling.
Embodiment 2
Weathering steel of the present invention is prepared from by following component by weight percentage：C, 0.06%；Si, 0.71%；
Mn, 1.2%；P, 0.013%；S, 0.003%；Al, 0.73%；N, 0.0025%；O, 0.003%；
Balance of Fe and trace impurity.
Weathering steel step of preparation process is as follows：
1) converter or electric furnace smelting；2) LF refining or RH application of vacuum；3) continuous casting；4) high-temperature heating
Stove heat：By heating strand to 1260 DEG C, soaking time presses weathering steel effective thickness 1.8min/mm controls,
Initial slab thickness is 60mm, and soaking time is 108min；5) roughing：Weathering steel workpiece thickness is
7 times of finished product thickness (22mm)；6) high temperature finish rolling：Weathering steel workpiece thickness is finished product thickness (22mm)
7 times, wherein, 1030 DEG C of entry temperature at finishing, 950 DEG C of finishing temperature；7) cool down：Section cooling；8)
High temperature coiling is coiled：610 DEG C of coiling temperature, is incubated one hour air cooling and gets product after high temperature coiling.
Embodiment 3
Weathering steel of the present invention is prepared from by following component by weight percentage：C, 0.06%；Si, 0.83%；
Mn, 1.3%；P, 0.013%；S, 0.002%；Al, 0.81%；N, 0.0030%；O, 0.001%；
Balance of Fe and trace impurity.
Weathering steel step of preparation process is as follows：
1) converter or electric furnace smelting；2) LF refining or RH application of vacuum；3) continuous casting；4) high-temperature heating
Stove heat：By heating strand to 1290 DEG C, soaking time presses weathering steel effective thickness 1.8min/mm controls,
Initial slab thickness is 60mm, and soaking time is 108min；5) roughing：Weathering steel workpiece thickness is
6 times of finished product thickness (24mm)；6) high temperature finish rolling：Weathering steel workpiece thickness is finished product thickness (24mm)
6 times, wherein, 1040 DEG C of entry temperature at finishing, 950 DEG C of finishing temperature；7) cool down：Section cooling；8)
High temperature coiling is coiled：590 DEG C of coiling temperature, is incubated one hour air cooling and gets product after high temperature coiling.
Embodiment 4
Weathering steel of the present invention is prepared from by following component by weight percentage：C, 0.07%；Si, 0.89%；
Mn, 1.1%；P, 0.010%；S, 0.001%；Al, 0.69%；N, 0.0028%；O, 0.002%；
Balance of Fe and trace impurity.
Weathering steel step of preparation process is as follows：
1) converter or electric furnace smelting；2) LF refining or RH application of vacuum；3) continuous casting；4) high-temperature heating
Stove heat：By heating strand to 1250 DEG C, soaking time presses weathering steel effective thickness 1.8min/mm controls,
Initial slab thickness is 60mm, and soaking time is 108min；5) roughing：Weathering steel workpiece thickness is
8 times of finished product thickness (18mm)；6) high temperature finish rolling：Weathering steel workpiece thickness is finished product thickness (18mm)
8 times, wherein, 1000 DEG C of entry temperature at finishing, 950 DEG C of finishing temperature；7) cool down：Section cooling；8)
High temperature coiling is coiled：620 DEG C of coiling temperature, is incubated one hour air cooling and gets product after high temperature coiling.
Embodiment 5
Weathering steel of the present invention is prepared from by following component by weight percentage：C, 0.08%；Si, 0.54%；
Mn, 1.6%；P, 0.011%；S, 0.002%；Al, 0.75%；N, 0.0026%；O, 0.003%；
Balance of Fe and trace impurity.
Weathering steel step of preparation process is as follows：
1) converter or electric furnace smelting；2) LF refining or RH application of vacuum；3) continuous casting；4) high-temperature heating
Stove heat：By heating strand to 1300 DEG C, soaking time presses weathering steel effective thickness 1.8min/mm controls,
Initial slab thickness is 60mm, and soaking time is 108min；5) roughing：Weathering steel workpiece thickness is
7 times of finished product thickness (24mm)；6) high temperature finish rolling：Weathering steel workpiece thickness is finished product thickness (24mm)
7 times, wherein, 1050 DEG C of entry temperature at finishing, 950 DEG C of finishing temperature；7) cool down：Section cooling；8)
High temperature coiling is coiled：580 DEG C of coiling temperature, is incubated one hour air cooling and gets product after high temperature coiling.
The high-strength weathering steel that embodiment 1~5 is made carries out mechanical property, impact, bend test detection, detection
Data such as table 1.
The weathering steel performance test results of table 1
After carrying out performance detection to the weathering steel that embodiment 1~5 is made, separately to preparation in above-mentioned 5 embodiments
Novel weathering resistant steel grade carries out hanging test in Wuhan suburb and Bei Jingliang townshiies suburb respectively, observes 1 year cycle, sees
The time of examining detects 5 decay resistances of embodiment weathering steel after terminating；Wherein, in Wuhan suburb, its corrosion resistant
Corrosion energy：1# weathering steels, 0.08567mm/a；2# weathering steels, 0.06423mm/a；3# weathering steels, 0.05723
mm/a；4# weathering steels, 0.05989mm/a；5# weathering steels, 0.07003mm/a.In Bei Jingliang townshiies suburb,
1# weathering steels, 0.01598mm/a；2# weathering steels, 0.01203mm/a；3# weathering steels, 0.01167mm/a；
4# weathering steels, 0.01892mm/a；5# weathering steels, 0.02004mm/a.Accompanying drawing is shown in specific corrosion rate change
1 and accompanying drawing 2, can be obtained from figure, weathering steel corrosion resistance of the present invention is significantly higher than Q420.
Presently preferred embodiments of the present invention is the foregoing is only, is not intended to limit the invention, it is all in the present invention
Spirit and principle within, any modification, equivalent substitution and improvements made etc., in pending right of the invention
Within the scope of claimed.
Claims (7)
1. transmission tower weathering steel under a kind of rural atmosphere, it is characterised in that the weathering steel is by pressing
The following component of percentage by weight meter is prepared from：
C, 0.05~0.10%；Si, 0.50~1.0%；Mn, 1.0~1.8%；P, 0.01~0.02%；S ,≤0.003%；
Al, 0.4~0.9%；N ,≤0.003%；O ,≤0.003%；Balance of Fe and trace impurity.
2. transmission tower weathering steel under a kind of rural atmosphere as claimed in claim 1, its feature exists
In the weathering steel is prepared from by following component by weight percentage：
C, 0.05~0.07%；Si, 0.60~0.9%；Mn, 1.2~1.6%；P, 0.011~0.013%；Al,
0.6~0.9%.
3. transmission tower weathering steel under a kind of rural atmosphere as claimed in claim 1, its feature exists
In the weathering steel is prepared from by following component by weight percentage：
C, 0.06%；Si, 0.83%；Mn, 1.3%；P, 0.013%；S, 0.002%；Al, 0.81%；
N, 0.003%；O, 0.001%.
4. under a kind of rural atmosphere as claimed in claim 1 transmission tower weathering steel preparation method,
Comprise the steps：
1) converter or electric furnace smelting；2) LF refining or RH application of vacuum；3) continuous casting；4) high-temperature heating
Stove heat；5) roughing；6) high temperature finish rolling；7) cool down；8) high temperature coiling is coiled.
5. preparation method as claimed in claim 4, it is characterised in that the step 4) include：Will casting
Base is heated to 1250~1300 DEG C；Determine soaking time, 1.8min/mm by weathering steel effective thickness.
6. preparation method as claimed in claim 4, it is characterised in that the step 5) and step 6) in,
Weathering steel workpiece thickness is 6~8 times of finished product thickness, wherein, 1000~1050 DEG C of entry temperature at finishing,
950 DEG C of finishing temperature.
7. preparation method as claimed in claim 4, it is characterised in that the step 7) middle laminar flow is cold
But mode；The step 8) include：580~625 DEG C, one hour air cooling is incubated after batching and is got product.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111020365A (en) * | 2018-10-09 | 2020-04-17 | 中国电力科学研究院有限公司 | Weather-resistant steel, steel plate manufacturing method thereof and angle steel manufacturing method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102650015A (en) * | 2012-05-29 | 2012-08-29 | 江苏省沙钢钢铁研究院有限公司 | Economical fine-grain high-toughness weather-resistant medium-thickness steel plate and production method thereof |
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2015
- 2015-11-25 CN CN201510834931.6A patent/CN106756470A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102650015A (en) * | 2012-05-29 | 2012-08-29 | 江苏省沙钢钢铁研究院有限公司 | Economical fine-grain high-toughness weather-resistant medium-thickness steel plate and production method thereof |
Non-Patent Citations (1)
| Title |
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| 王国承: "《钢中夹杂物尺寸控制理论》", 30 January 2015, 冶金工业出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111020365A (en) * | 2018-10-09 | 2020-04-17 | 中国电力科学研究院有限公司 | Weather-resistant steel, steel plate manufacturing method thereof and angle steel manufacturing method |
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