CN110144526A - Hot-rolled steel sheet pile and its production method - Google Patents
Hot-rolled steel sheet pile and its production method Download PDFInfo
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- CN110144526A CN110144526A CN201910559462.XA CN201910559462A CN110144526A CN 110144526 A CN110144526 A CN 110144526A CN 201910559462 A CN201910559462 A CN 201910559462A CN 110144526 A CN110144526 A CN 110144526A
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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
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
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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
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/02—Sheet piles or sheet pile bulkheads
- E02D5/03—Prefabricated parts, e.g. composite sheet piles
- E02D5/04—Prefabricated parts, e.g. composite sheet piles made of steel
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- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
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- Civil Engineering (AREA)
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Abstract
The invention discloses hot-rolled steel sheet pile, the chemical components and weight percent of steel are as follows: C 0.21~0.50%, Si≤0.17%, Mn 0.7~0.99%, P≤0.030%, S≤0.030%, remaining is Fe and inevitable impurity.The present invention is adjusted the effective component in molten steel, increase the dosage of carbon, reduce the dosage of manganese, silicon, phosphorus, sulphur, chemical components various in molten steel are reasonably combined, under conditions of not adding niobium V-Ti, while production cost is greatly lowered, it ensure that hot-rolled steel sheet pile mechanical property reaches the requirement of each trade mark mechanical property of GB/T 20993-2014 standard requirements.
Description
Technical field
The present invention relates to technical field of steel production, and in particular to hot-rolled steel sheet pile and its production method.
Background technique
Steel sheet pile is a kind of fashioned iron with fore shaft, and there are straight panel shape, U-shaped and Z-shaped etc. in section, and steel sheet pile is hydraulic engineering
Construction, cofferdam construction, constructing tunnel, subgrade engineering, abutment engineering necessity.Steel sheet pile has the advantage that high quality is (high
Intensity, light-duty, water-resisting property is good)；Construction is simple, short time limit, construction cost are cheap；Durability is good, service life 20-50；Make
It can not be restricted by weather condition with steel sheet pile, during using steel sheet pile, can simplify and check material or system performance
Complicated process；Interchangeability is good, 3-5 times reusable, can recycle and reuse, and saves fund；Construction has significant
Environment protecting, substantially reduce take soil amount and concrete usage amount, be effectively protected land resource；Disaster relief and rescue when
Effect property is stronger, such as controls flood, caves in, collapsing, drift sand.
The practical value of steel sheet pile is embodied in the innovation production of many new products, such as: some special welderings
Building made of connecing；The metal plate being made by hydraulic vibration piling machine；Special sealing add print technique development be exactly
One good example of this respect.For example HOESCH patent system, its appearance have started steel sheet pile in terms of controlling pollution
Important new field.Since steel sheet pile is used as the retaining wall of vertical seal to protect contaminated soil, steel sheet pile has been found
Meet all requirements for preventing leak and pollution.The advantage that steel sheet pile is used as retaining wall is also gradually widely used in other necks
Among domain.
Steel sheet pile causes because shape is special using cold-rolling process difficulty, and welding steel stake is because steel sheet pile fore shaft etc. is special
Shape and welding need flaw detection, problems of welded quality itself etc. to be not easy heavy industrialization.The country is substantially with hot-rolled steel at present
Based on sheet pile, man, hot-rolled steel sheet pile state of enforcement standard GB/T20933-2014, main specifications includes Z-shape steel sheet pile 3, linear type
Steel sheet pile 4 and U-shaped steel sheet pile 16, in total 23 specification products.The main trade mark are as follows: Q295P, Q345P, Q390P,
Q420P,Q460P.The chemical component of each trade mark of national Specification is referring to following table:
Chemical component as defined in GB/T 20933-2014 (heat analysis):
Note 1: carbon equivalent calculation formula is CEV=C+Mn/6+ (Cr+Mo+V)/5+ (Ni+Cu)/15
The steel sheet pile mechanical property of national Specification is referring to following table:
Carbon: being most important ingredient in steel, and carbon amounts increase can be such that steel medium pearlite amount increases, can increase 50%FATT.
Therefore it is in production the toughness of raising material often using carbon content is reduced in the composition range that the steel grade allows, thus produces
Raw intensity decline is then made up by manganese content in increase ingredient.
Manganese: being critically important alloy element.Manganese can expand austenite phase field, increase A4 point, the decline of A3 point.Due to A3
Temperature decline, makes pro-eutectoid ferrite be precipitated and refine at lower temperatures.Similarly, since A3 temperature declines, it is suppressed that carbon
Compound is precipitated on overcooling austenite crystal boundary, so that steel is kept higher plasticity, and reduce the Ductile-brittle transition temperature of steel, because
This, manganese is also the main alloy element in low-temperature steel.
Silicon: being main added elements in China's low-alloy steel.Silicon does not form carbide in steel and is solid-solution in ferrite, and solid solution is strong
Change effect it is very strong, be only second to carbon, nitrogen, phosphorus and be more than other elements reduced simultaneously to improve the intensity and hardness of steel significantly
The toughness of steel improves fracture appearance transition tem.
Phosphorus: being the objectionable impurities in steel.Since its segregation tendency is serious, can cause to endanger in fewer content state
Evil.Phosphorus is very harmful to the cryogenic property of steel material, generally believes that phosphorus is the main arch-criminal for causing the black brittleness of steel at present.
Segregation tendency of the phosphorus in steel causes banded structure, uses the mechanical heterogeneity of steel, especially those low temperature than more serious
Steel, marine steel and anti-hydrogen induced cracking steel require phosphorus content less than 0.01% or 0.005%.
Sulphur is the objectionable impurities in most steel grades (in addition to automatic steel).Segregation coefficient of the sulphur in steel is in all members
It is maximum in element, if being segregated in crystal boundary, low temperature grain boundary fracture and high-temperature embrittlement can be caused.Increase inclusion particle, easily causes folder
Sundries crackle makes processing performance and service performance all be damaged.For aviation steel, oil and natural gas feed-line steel,
Offshore production platform steel etc., it is necessary to strict control sulfur content, to guarantee necessary toughness.
Niobium, vanadium, titanium: the microalloy element largely used in hot-rolled steel sheet pile at present, the main mechanism of action are brilliant except refinement
Outside grain invigoration effect, above-mentioned element forms carbide and nitride or carboritride in steel, using under different conditions
Precipitation enhancement that generation is dissolved and precipitation mechanism inhibition crystal grain is grown up and generated.In the production of hot-rolled steel sheet pile in addition
Three kinds of elements are stated, under the conditions of on the one hand nitrogen oxygen content is higher in molten steel or ferrovanadium nitride is added, are easy directly production nitridation
Object and generate stress cracking, be both easy to cause waste product in production, also because of nitride, there are internal stress in qualified product, give
Subsequent use brings serious potential hazard；On the other hand domestic niobium, vanadium, titanium alloy hold at high price at present, cause with niobium,
Vanadium, the steel sheet pile price of Ti Alloying production are higher；And more rare niobium, vanadium, titanium alloy resource are used to produce ordinary hot
Steel rolling sheet pile causes the significant waste of resource.Therefore a kind of hot-rolled steel sheet pile for not needing addition niobium, vanadium, titanium, is that solution is above-mentioned
The key of technical problem.
Summary of the invention
For the above-mentioned prior art, the object of the present invention is to provide hot-rolled steel sheet pile and its production methods.The present invention is to steel
Effective component in water is adjusted, and increases the dosage of carbon, reduces the dosage of manganese, silicon, phosphorus, sulphur, by variousization in molten steel
Reasonable composition collocation is learned, under conditions of not adding niobium V-Ti, while production cost is greatly lowered, ensure that hot rolling
Steel sheet pile mechanical property reaches the requirement of each trade mark mechanical property of GB/T20993-2014 standard requirements.
The present invention with carbon, manganese element for main hydrodynamics element, to improve carbon element content, reasonable disposition manganese element,
Reach certain carbon equivalent ce V to realize different trade mark performance requirements；By controlling and reducing silicon, phosphorus, sulfur content, guarantee
The clarity and continuity of steel, are effectively ensured the extension property of steel.It changes to add vanadium, niobium, titanium elements refinement crystal grain
Reinforcing and carbonitride Secondary phase particle strengthened production process mode.
To achieve the above object, the present invention adopts the following technical scheme:
The first aspect of the present invention provides a kind of hot-rolled steel sheet pile, the chemical component and weight percent of steel are as follows: C
0.21~0.50%, Si≤0.17%, Mn 0.7~0.99%, P≤0.030%, S≤0.030%, remaining is Fe and can not keep away
The impurity exempted from.
Preferably, the chemical component and weight percent of steel are as follows: C 0.29~0.50%, Si 0.09~0.17%, Mn
0.7~0.96%, P 0.015~0.025%, S 0.010~0.020%, remaining is Fe and inevitable impurity.
The second aspect of the present invention provides the production method of above-mentioned hot-rolled steel sheet pile, comprising the following steps:
(1) converter or electric furnace smelting；
(2) refining furnace refines；
(3) continuous casting throwing；
(4) heating steel billet；
(5) hot rolling obtains steel sheet pile finished product.
Preferably, in step (1), the tapping temperature that control is smelted when smelting is 1600~1660 DEG C.
Preferably, in step (2), control basicity of slag is greater than 3.0 when refining furnace refines.
Preferably, in step (3), the tundish temperature of conticaster is 1480-1550 DEG C, and middle packet degree of superheat control is 20~30
DEG C, pulling rate is 0.5~0.8m/min.
Preferably, in step (4), when heating steel billet, heater for rolling steel temperature is 1210~1300 DEG C.
Preferably, in step (5), the hot rolling includes split rolling method and omnipotent tandem rolling.
Preferably, temperature is not less than 1110 DEG C when split rolling method, and 7 passages are back and forth rolled through big mill；When omnipotent tandem rolling,
Universal rolling mill group start rolling temperature is not less than 940 DEG C, and finishing temperature is 820~950 DEG C.
The third aspect of the present invention provides above-mentioned hot-rolled steel sheet pile answering in water seepage prevention engineering and structure basis engineering
With.The water seepage prevention engineering includes embankment reinforcement, cofferdam of shutting off, and the structure basis engineering includes retaining wall, waterwall, builds
Build pattern foundation pit supporting structure.
Beneficial effects of the present invention:
(1) present invention is adjusted the effective component in molten steel, increases the dosage of carbon, reduces manganese, silicon, phosphorus, sulphur
Dosage, chemical components various in molten steel are reasonably combined, under conditions of not adding niobium V-Ti, production is greatly lowered
While cost, it ensure that hot-rolled steel sheet pile mechanical property reaches each trade mark mechanical property of GB/T 20993-2014 standard requirements
The requirement of energy.
(2) chemical component of the reasonable control hot-rolled steel sheet pile steel product of the present invention, using completely new chemical component system,
And cooperating manufacture method, be control target with melting chemical composition, it is accurate control carbon in hot-rolled steel sheet pile finished steel, silicon, manganese,
Phosphorus, sulphur Contents of Main Components guarantee that mechanical property and interior tissue meet steel sheet pile requirement, have reached different trade mark hot rollings
The mechanical property requirements of steel sheet pile, excellent steel performance ensure that the normal use of steel sheet pile.
(3) GB/T20993- is reached using the tissue and mechanical property of the hot-rolled steel sheet pile product of the method for the present invention production
Each trade mark product requirement, belongs to low-cost high-efficiency product in 2014 standards, effectively will fill up domestic and international market blank, significantly drops
Low steel sheet pile production cost, has saved rare alloy resource, and having reduces cost, economize on resources, be conducive to environmental protection, reinforce
The obvious effects such as circular economy, are of great significance to the national economic development.
Specific embodiment
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the application.Unless another
It indicates, all technical and scientific terms used herein has usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
As background technology part introduction, in the preparation of hot-rolled steel sheet pile, niobium, vanadium, titanium can be utilized in different items
Dissolution is generated under part and precipitation mechanism rises and crystal grain is inhibited to grow up and generate precipitation enhancement, but the nitrogen oxygen content in molten steel
Under the conditions of higher or addition ferrovanadium nitride, it is easy directly production nitride and generates stress cracking, while niobium, vanadium, titanium alloy
It holds at high price, high production cost.So especially needing to develop a kind of without adding niobium, vanadium, titanium hot-rolled steel sheet pile and its life
Production method.
Based on this, the object of the present invention is to provide hot-rolled steel sheet pile and its production method, by molten steel it is effective at
Divide and be adjusted, increases the dosage of carbon, reduce the dosage of manganese, silicon, phosphorus, sulphur, chemical components various in molten steel are rationally taken
Match, under conditions of not adding niobium V-Ti, while production cost is greatly lowered, ensure that hot-rolled steel sheet pile mechanical property
The requirement of each trade mark mechanical property of GB/T 20993-2014 standard requirements can be reached.
Embodiment 1: the hot-rolled steel sheet pile that the trade mark is Q295P is prepared
The chemical component and weight percent of its steel are as follows: C 0.30%, Si 0.17%, Mn 0.77%, P 0.019%, S
0.010%, remaining is Fe and inevitable impurity.
Its production method includes the following steps:
(1) converter or electric furnace smelting；The tapping temperature that control is smelted when smelting is 1620~1660 DEG C.
(2) refining furnace refines；It controls basicity of slag and is greater than 3.0.
(3) continuous casting throwing；The tundish temperature of conticaster is 1500-1530 DEG C, and middle packet degree of superheat control is drawn at 20~30 DEG C
Speed is 0.6~0.8m/min.
(4) heating steel billet；When heating steel billet, heater for rolling steel temperature is 1250~1300 DEG C.
(5) hot rolling obtains steel sheet pile finished product；The hot rolling includes split rolling method and omnipotent tandem rolling, and temperature is not when split rolling method
Lower than 1150 DEG C, 7 passages are back and forth rolled through big mill；When omnipotent tandem rolling, universal rolling mill group start rolling temperature is not less than 970
DEG C, finishing temperature is 850~950 DEG C.
Embodiment 2: the hot-rolled steel sheet pile that the trade mark is Q345P is prepared
The chemical component and weight percent of its steel are as follows: C 0.32%, Si 0.16%, Mn 0.77%, P 0.023%, S
0.019%, remaining is Fe and inevitable impurity.
Its production method includes the following steps:
(1) converter or electric furnace smelting；The tapping temperature that control is smelted when smelting is 1620~1660 DEG C.
(2) refining furnace refines；It controls basicity of slag and is greater than 3.0.
(3) continuous casting throwing；The tundish temperature of conticaster is 1500-1530 DEG C, and middle packet degree of superheat control is drawn at 20~30 DEG C
Speed is 0.6~0.8m/min.
(4) heating steel billet；When heating steel billet, heater for rolling steel temperature is 1250~1300 DEG C.
(5) hot rolling obtains steel sheet pile finished product；The hot rolling includes split rolling method and omnipotent tandem rolling, and temperature is not when split rolling method
Lower than 1130 DEG C, 7 passages are back and forth rolled through big mill；When omnipotent tandem rolling, universal rolling mill group start rolling temperature is not less than 970
DEG C, finishing temperature is 850~950 DEG C.
Embodiment 3: the hot-rolled steel sheet pile (dosage that following each element please be supplement) that the trade mark is Q390P is prepared
The chemical component and weight percent of its steel are as follows: C 0.37%, Si 0.15%, Mn 0.85%, P 0.018%, S
0.018%, remaining is Fe and inevitable impurity.
Its production method includes the following steps:
(1) converter or electric furnace smelting；The tapping temperature that control is smelted when smelting is 1610~1650 DEG C.
(2) refining furnace refines；It controls basicity of slag and is greater than 3.0.
(3) continuous casting throwing；The tundish temperature of conticaster is 1490-1520 DEG C, and middle packet degree of superheat control is drawn at 20~30 DEG C
Speed is 0.5~0.75m/min.
(4) heating steel billet；When heating steel billet, heater for rolling steel temperature is 1230~1280 DEG C.
(5) hot rolling obtains steel sheet pile finished product；The hot rolling includes split rolling method and omnipotent tandem rolling, and temperature is not when split rolling method
Lower than 1130 DEG C, 7 passages are back and forth rolled through big mill；When omnipotent tandem rolling, universal rolling mill group start rolling temperature is not less than 950
DEG C, finishing temperature is 840~940 DEG C.
Embodiment 4: the hot-rolled steel sheet pile that the trade mark is Q420P is prepared
The chemical component and weight percent of its steel are as follows: C 0.41%, Si 0.12%, Mn 0.87%, P0.023%, S
0.018%, remaining is Fe and inevitable impurity.
Its production method includes the following steps:
(1) converter or electric furnace smelting；The tapping temperature that control is smelted when smelting is 1610~1650 DEG C.
(2) refining furnace refines；It controls basicity of slag and is greater than 3.0.
(3) continuous casting throwing；The tundish temperature of conticaster is 1490-1520 DEG C, and middle packet degree of superheat control is drawn at 20~30 DEG C
Speed is 0.5~0.75m/min.
(4) heating steel billet；When heating steel billet, heater for rolling steel temperature is 1230~1280 DEG C.
(5) hot rolling obtains steel sheet pile finished product；The hot rolling includes split rolling method and omnipotent tandem rolling, and temperature is not when split rolling method
Lower than 1130 DEG C, 7 passages are back and forth rolled through big mill；When omnipotent tandem rolling, universal rolling mill group start rolling temperature is not less than 950
DEG C, finishing temperature is 830~930 DEG C.
Embodiment 5: the hot-rolled steel sheet pile that the trade mark is Q460P is prepared
The chemical component and weight percent of its steel are as follows: C 0.46%, Si 0.09%, Mn 0.96%, P 0.015%, S
0.010%, remaining is Fe and inevitable impurity.
Its production method includes the following steps:
(1) converter or electric furnace smelting；The tapping temperature that control is smelted when smelting is 1600~1640 DEG C.
(2) refining furnace refines；It controls basicity of slag and is greater than 3.0.
(3) continuous casting throwing；The tundish temperature of conticaster is 1480-1510 DEG C, and middle packet degree of superheat control is drawn at 20~30 DEG C
Speed is 0.5~0.7m/min.
(4) heating steel billet；When heating steel billet, heater for rolling steel temperature is 1210~1260 DEG C.
(5) hot rolling obtains steel sheet pile finished product；The hot rolling includes split rolling method and omnipotent tandem rolling, and temperature is not when split rolling method
Lower than 1110 DEG C, 7 passages are back and forth rolled through big mill；When omnipotent tandem rolling, universal rolling mill group start rolling temperature is not less than 940
DEG C, finishing temperature is 820~920 DEG C.
Measure the yield strength, tensile strength and elongation percentage of hot-rolled steel sheet pile made from each embodiment
It materialses respectively on hot-rolled steel sheet pile made from from embodiment 1 to embodiment 5, sample is sawed from hot-rolled steel sheet pile
Under long strip block, by universal testing machine to each sample carry out breaking test.
Measurement result is as shown in the table:
As seen from the above table, hot-rolled steel sheet pile obtained by embodiment 1 to embodiment 5, performance meet GB/T respectively
The requirement of Q295P, Q345P, Q390P, Q420P, Q460P mechanical property as defined in 20933-2014.
Therefore the present invention passes through the chemical component for rationally controlling hot-rolled steel sheet pile steel product, using completely new chemical component
System, and cooperating manufacture method, it is accurate to control carbon, silicon, manganese, phosphorus, sulphur Contents of Main Components in hot-rolled steel sheet pile finished steel, it protects
It has demonstrate,proved mechanical property and interior tissue meets steel sheet pile requirement, the mechanical property for having reached different trade mark hot-rolled steel sheet piles is wanted
It asks.
The foregoing is merely preferred embodiment of the present application, are not intended to limit this application, for the skill of this field
For art personnel, various changes and changes are possible in this application.Within the spirit and principles of this application, made any to repair
Change, equivalent replacement, improvement etc., should be included within the scope of protection of this application.
Claims (10)
1. hot-rolled steel sheet pile, which is characterized in that the chemical component and weight percent of its steel are as follows: C 0.21~0.50%, Si≤
0.17%, Mn 0.7~0.99%, P≤0.030%, S≤0.030%, remaining is Fe and inevitable impurity.
2. hot-rolled steel sheet pile according to claim 1, which is characterized in that the chemical component and weight percent of its steel are as follows: C
0.29~0.50%, Si 0.09~0.17%, Mn 0.7~0.96%, P 0.015~0.025%, S 0.010~
0.020%, remaining is Fe and inevitable impurity.
3. the production method of any one of the claim 1-2 hot-rolled steel sheet pile, which comprises the following steps:
(1) converter or electric furnace smelting；
(2) refining furnace refines；
(3) continuous casting throwing；
(4) heating steel billet；
(5) hot rolling obtains steel sheet pile finished product.
4. production method according to claim 3, which is characterized in that in step (1), control is smelted when smelting tapping temperature
Degree is 1600~1660 DEG C.
5. production method according to claim 3, which is characterized in that in step (2), refining furnace controls basicity of slag when refining
Greater than 3.0.
6. production method according to claim 3, which is characterized in that in step (3), the tundish temperature of conticaster is
1480-1550 DEG C, at 20~30 DEG C, pulling rate is 0.5~0.8m/min for middle packet degree of superheat control.
7. production method according to claim 3, which is characterized in that in step (4), when heating steel billet, heater for rolling steel
Temperature is 1210~1300 DEG C.
8. production method according to claim 3, which is characterized in that in step (5), the hot rolling include split rolling method and
Omnipotent tandem rolling.
9. production method according to claim 8, which is characterized in that temperature is not less than 1110 DEG C when split rolling method, through opening
Steel mill back and forth rolls 7 passages；When omnipotent tandem rolling, universal rolling mill group start rolling temperature is not less than 940 DEG C, finishing temperature 820
~950 DEG C.
10. application of the described in any item hot-rolled steel sheet piles of claim 1-2 in water seepage prevention engineering and structure basis engineering.
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| CN201910559462.XA CN110144526B (en) | 2019-06-26 | 2019-06-26 | Hot-rolled steel sheet pile and production method thereof |
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| CN201910559462.XA CN110144526B (en) | 2019-06-26 | 2019-06-26 | Hot-rolled steel sheet pile and production method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112727900A (en) * | 2020-12-25 | 2021-04-30 | 山东德坊新材料科技有限公司 | Hot-rolled C9 type lock catch deformed steel |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH055127A (en) * | 1991-02-07 | 1993-01-14 | Nippon Steel Corp | Production of high strength steel sheet pile |
| CN101838773A (en) * | 2010-04-30 | 2010-09-22 | 武汉钢铁(集团)公司 | Steel for acid soil corrosion-resistant hot rolling U-shaped steel sheet pile and production method thereof |
| CN101845584A (en) * | 2010-04-09 | 2010-09-29 | 武汉钢铁(集团)公司 | Fresh-water corrosion resistant steel for U-shaped steel sheet pile and method for producing same |
-
2019
- 2019-06-26 CN CN201910559462.XA patent/CN110144526B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH055127A (en) * | 1991-02-07 | 1993-01-14 | Nippon Steel Corp | Production of high strength steel sheet pile |
| CN101845584A (en) * | 2010-04-09 | 2010-09-29 | 武汉钢铁(集团)公司 | Fresh-water corrosion resistant steel for U-shaped steel sheet pile and method for producing same |
| CN101838773A (en) * | 2010-04-30 | 2010-09-22 | 武汉钢铁(集团)公司 | Steel for acid soil corrosion-resistant hot rolling U-shaped steel sheet pile and production method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112727900A (en) * | 2020-12-25 | 2021-04-30 | 山东德坊新材料科技有限公司 | Hot-rolled C9 type lock catch deformed steel |
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| CN110144526B (en) | 2020-07-21 |
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