CN106929772A - A kind of Steel Bar and preparation method thereof and rod iron - Google Patents
A kind of Steel Bar and preparation method thereof and rod iron Download PDFInfo
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- CN106929772A CN106929772A CN201710148318.8A CN201710148318A CN106929772A CN 106929772 A CN106929772 A CN 106929772A CN 201710148318 A CN201710148318 A CN 201710148318A CN 106929772 A CN106929772 A CN 106929772A
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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
- C22C38/38—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese
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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
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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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium 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
- C22C38/34—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of silicon
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Abstract
The present invention is a kind of Steel Bar and preparation method thereof and rod iron.The composition of the Steel Bar includes the chemical composition of following mass percent：C：0.15% to 0.35%；Mn：2.00% to 3.50%；Si：1.00% to 2.5%；Cr：0.10% to 0.85%；V：0.01% to 0.12%；The mass ratio of Mn and Si is between 1.05 to 1.65 in balance of Fe, and the Steel Bar.Steel Bar provided by the present invention has intensity and preferable plasticity higher concurrently.Simultaneously simple into production. art, cost is relatively low.
Description
Technical field
The present invention relates to Steel Bar field, more particularly to a kind of Steel Bar, the Steel Bar preparation method and profit
The rod iron being made of the Steel Bar.
Background technology
Since China's steel annual production broke through 100,000,000 tons from 1996, steel production capacity and actual production grow continuously and fast, closely
It is even more within 2 years and reaches more than 800,000,000 tons/year, is also that steel consumes the first big country as qualified big steel country.But China's steel
Iron product mid- to high-end product is less, and low side mill run occupies significant fraction production capacity, and a large amount of high-end products need import, therefore I
State is big steel country, and apart from steel, there be larger gap in power.
In general, the intensity of steel is conflict with plasticity and toughness, the means of the i.e. raising intensity of reinforcing of steel are all to drop
The plasticity and toughness of low steel are cost, and the raising of intensity can cause plasticity and toughness to decline, and fragility increases.High-strength steel is obtaining high intensity
While, it may have fragility higher.The development of modern industrial technology proposes higher and higher requirement to engineering material, especially
It is the combination property requirement more and more higher of structural material, it is desirable to the cooperation of obdurability high.The relatively good steel of elongation percentage, intensity
Often unsatisfactory, such as twin crystal induction plastic (TWIP) steel, its elongation percentage can reach 60%, in addition, TWIP steel Mn elements
Content be 20-30%, belong to high-alloy steel, into produce it is relatively costly, but tensile strength is less than 1000MPa, and the intensity of steel
Improve, but to sacrifice plasticity as cost.Even so, the highest yield strength of steel also just 1200MPa.Obviously, they are difficult to full
The occasion of sufficient higher intensity requirement.
Therefore, how to cause that steel have intensity higher and preferable plasticity concurrently and turn into this area technology urgently to be resolved hurrily and ask
Topic.
The content of the invention
It is not enough present in current techniques it is an object of the invention to be directed to, there is provided a kind of Steel Bar, the Steel Bar
Preparation method.The Steel Bar adds appropriate microalloy element such as V on the basis of common C-Si-Mn mild steel, and
Define silicomanganese ratio in steel, the alloying element ratio of being optimal.Various alloy units are being given full play to by composite alloying
On plain exposure basis, each alloying element reciprocation reaches the cooperation of Fracture of Material.With inexpensive ordinary steel in preparation method
Production technology equipment (converter smelting --- LF stoves refine --- continuous casting --- tandem rolling) production high-quality special steel kind, then pass through
Special thermal treatment technique realizes the property of steel.The Steel Bar that the present invention is obtained has intensity higher and preferably modeling concurrently
Property.
The technical scheme is that：
A kind of Steel Bar, wherein, the Steel Bar includes the chemical composition of following mass percent：
C：0.15% to 0.35%；Mn：2.00% to 3.50%；Si：1.00% to 2.5%；Cr：0.10% to
0.85%；
V：0.01% to 0.12%；The mass ratio of Mn and Si is 1.05 to 1.65 in balance of Fe, and the Steel Bar
Between.
The preparation method of the Steel Bar, comprises the following steps：
(1) according to the composition and ratio of described Steel Bar, blast-melted being blended into is bessemerized, obtains initial molten steel,
Ferroalloy is added to carrying out alloying in ladle, then LF refining is carried out to the molten steel after the alloying, described wait to cast to obtain
Molten steel；
Described ferroalloy is Antaciron, manganeisen, ferrochrome and vanadium iron；
(2) will treat that cast steel water carries out continuous casting, obtain steel billet, i.e. Steel Bar.
A kind of rod iron, is made up of described Steel Bar.
The preparation method of described rod iron, comprises the following steps：
(1) steel billet is carried out into continuous rolling, is rolled into required specification rod iron.Wherein, start rolling temperature be 1100 DEG C extremely
1050 DEG C, finishing temperature is 950 DEG C to 1000 DEG C；Then rear product will be rolled and will be air cooled to room temperature；
(2) roll product after cooling is heated to 850 DEG C to 900 DEG C, soaking time is 25min to 35min；Then water
It is cooled to 50 DEG C to 350 DEG C, cool time is 5min to 20min；The product after cooling is carried out into temper again, temperature is
200 DEG C to 350 DEG C, soaking time is 20min to 120min, finally obtains required rod iron.
Beneficial effects of the present invention are：
Current high-strength steel bar, predominantly cold rolling TWIP steel and martensite steel.TWIP steel, although its elongation percentage is ranged up to
60%, but its tensile strength is less than 1000MPa, and yield strength is only 500MPa, and production cost is higher.Martensite steel resists
Tensile strength is less than 1600MPa, and yield strength is less than 1200MPa, and elongation percentage is less than 15%.Strength and ductility product is less than 24GPa%.
In the present invention, by adding appropriate microalloy element such as V, and manganese and silicon mass ratio 1.05 to 1.65
Between design, because manganese has acted on solution strengthening effect, silicon is based on stable austenite；Postpone Ovshinsky in heat treatment process
Body is decomposed, and good plasticity and toughness are obtained while strengthening steel by phase change induction plasticity；The Main Function of chromium is to improve through hardening
Property, quenching is to obtain low-carbon (LC) lath-shaped martensitic structure, and tissue preparation is carried out to obtain good performance.The main work of vanadium
With being crystal grain thinning and dispersion-strengtherning.
Finally the performance of the Steel Bar that the present invention is obtained is：Tensile strength：Average value 1785MPa (measured value scopes：
1765MPa to 1800MPa)；Yield strength：Average value 1455MPa (measured value scopes：1430MPa to 1475MPa)；Elongation percentage：
Average value 18.0% (measured value scope 17.3% to 18.8%)；Strength and ductility product：Average value 32.13GPa%.
Therefore, Steel Bar provided by the present invention has intensity and preferable plasticity higher concurrently.Simultaneously into production. art letter
Single, cost is relatively low.
Specific embodiment
Here exemplary embodiment will be illustrated in detail, its example is illustrated in the accompanying drawings.Following description is related to
During accompanying drawing, unless otherwise indicated, the same numbers in different accompanying drawings represent same or analogous key element.Following exemplary embodiment
Described in implementation method do not represent and the consistent all implementation methods of the present invention.Conversely, they be only with it is such as appended
The example of the consistent apparatus and method of some aspects being described in detail in claims, of the invention.
As the first aspect of the invention, there is provided a kind of Steel Bar, wherein, the Steel Bar includes following quality
The chemical composition of percentage：
C：0.15% to 0.35%；
Mn：2.00% to 3.50%；
Si：1.00% to 2.50%；
Cr：0.10% to 0.85%；
V：0.01% to 0.12%；
The mass ratio of Mn and Si is between 1.05 to 1.65 in balance of Fe, and the Steel Bar.
Steel Bar provided by the present invention belongs to low-carbon and low-alloy micro alloyed steel.It is to answer why to be referred to as Steel Bar
It is particularly suited for being processed into the rod iron of such as reinforcing bar for steel provided by the present invention.
In the Steel Bar, carbon content is relatively low, it can be ensured that Steel Bar has preferable plasticity and toughness and good
Welding performance.Carbon is the main intensifying factor in Steel Bar, and carbon content has a significant effect to the intensity of Steel Bar, for low
Carbon steel, 0.01% carbon can make the intensity of Steel Bar improve 20MPa to 30MPa, meanwhile, may drop the elongation percentage of steel
It is low.In the present invention, the mass percent of carbon is 0.15% to 0.35%, such that it is able to ensure that it is higher that the Steel Bar has concurrently
Intensity and preferable plasticity.
There is manganese austenite phase field, solution strengthening, refined crystalline strengthening for expanding steel etc. to act on, and can improve the intensity of steel, and
And it is minimum that toughness and plasticity damage of the manganese to steel is added in steel.In the present invention, the mass ratio of manganese is 2.00% to 3.50%,
May insure that Steel Bar has intensity higher, and can ensure that Steel Bar has combination of strength and toughness higher, and
Uniformity with preferable global tissue performance.
Silicon can be with solution strengthening, and can be with stable austenite, and bainite is formed in being conducive to steel.In the present invention, silicon
Mass ratio be 1.00% to 2.50%, such that it is able to avoid while solution strengthening, stable austenite is played reducing steel
Welding performance.
Chromium can improve the quenching degree of steel, and the martensitic structure of high intensity is formed in steel.By after different temperatures tempering
The different obdurabilities combination that can be lived, meets different service condition demands.Additionally, chromium can also play crystal grain thinning and more with carbide
Dissipate the effect of reinforcing.In the present invention, the mass ratio of chromium is 0.10% to 0.85%, so as to be protected while the intensity of steel is improved
Hold the welding performance of steel.
Vanadium is micro alloying element, belongs to carbide, the main shape with intermetallic compound VC in steel
Formula is present, and the tungsten carbide for forming small and dispersed distribution produces very strong dispersion-strengtherning and grain refining effect, improves hardness of steel
Steel is set to obtain preferable toughness simultaneously.In the present invention, the mass ratio of vanadium is 0.01% to 0.12%, can improve the intensity of steel
While keep steel plasticity and toughness.
In the present invention, between 1.05 to 1.65, manganese has acted on solution strengthening effect to the mass ratio of manganese and silicon, and silicon is with steady
Determine based on austenite；Postpone austenite decomposition in heat treatment process, obtained while strengthening steel by phase change induction plasticity
Good plasticity and toughness；The Main Function of chromium is to improve quenching degree, and quenching is to obtain low-carbon (LC) lath-shaped martensitic structure, good to obtain
Good performance carries out tissue preparation.The Main Function of vanadium is crystal grain thinning and dispersion-strengtherning.Therefore, it is provided by the present invention
Steel Bar has intensity and preferable plasticity higher concurrently.
As the second aspect of the invention, there is provided a kind of rod iron, wherein, the rod iron is by provided by the present invention above-mentioned
Steel Bar is made.
Because the Steel Bar has good obdurability, therefore, the rod iron has good obdurability.
As the third aspect of the invention, there is provided a kind of preparation method of Steel Bar, wherein, the Steel Bar is
Above-mentioned Steel Bar provided by the present invention, the preparation method includes：
Smelted using the raw material of the Steel Bar, cast steel water is treated to obtain；
Treat that cast steel water carries out continuous casting to described, to obtain steel billet；
Continuous rolling is carried out to the steel billet, wherein, start rolling temperature is 1100 DEG C to 1050 DEG C, and finishing temperature is 950
DEG C to 1000 DEG C；
Product after rolling is cooled down.
The product obtained after roll product cooling is used directly for selling, it is also possible to which it is further processed.
Above-mentioned preparation method is adapted to the large-scale production of common iron and steel enterprise, and product quality is easily controllable.
, it is necessary to whole process protection is cast during continuous casting.In the art, protective casting refers to being exposed in air
Molten steel takes protection, with a kind of important technical measures for avoiding molten steel from being aoxidized by air secondary.
Preferably, it is air cooling that the preparation method is included to the roll product type of cooling.Roll product is entered using air cooling
Row cooling can also reduce the cost for manufacturing the Steel Bar.
In order to improve the performance of the Steel Bar, it is preferable that the preparation method also includes：
Roll product after cooling is heat-treated, including：
Roll product after cooling is heated to 850 DEG C to 900 DEG C, soaking time is 25min to 35min；
50 DEG C to 350 DEG C are water-cooled to, the water-cooled time is 5min to 20min；
Product after cooling is carried out into temper, temperature is 200 DEG C to 350 DEG C, soaking time be 20min extremely
120min。
Wherein, after the roll product after cooling being heated into 850 DEG C to 900 DEG C, roll product austenitizing can be made.Profit
It is quickly cooled down with water-cooled, it is therefore intended that improve the intensity of steel.
Embodiment 1
In the present invention, the smelting of raw material is carried out using 110 tons of oxygen top and bottom combined blown converter smeltings, is entered using 120 tons of LF
Row refining.Steel Bar is prepared using following methods：
S1, iron ore is carried out blast furnace process obtain it is blast-melted, blast-melted weight be 450 tons；
S2, blast-melted being blended into is bessemerized, obtains initial molten steel, add ferroalloy to carrying out alloying in ladle,
LF refining is carried out to the molten steel after the alloying again, wherein, using 110 tons of oxygen top and bottom combined blown converter smeltings to blast furnace molten steel
Converter smelting is carried out with ferroalloy, ferroalloy is Antaciron (FeSi75), manganeisen (FeMn68C4.0), ferrochrome
(FeCr50C1.0) and vanadium iron (FeV50) (purity is 99.7%), weight be respectively 2000Kg, 3500Kg, 1500Kg,
220Kg；Remaining is 102.78 tons of molten iron；
S3, the molten steel after converter smelting is refined using 120 tons of LF；
S4, continuous casting obtain 165X 165mm2Square billet, i.e. Steel Bar.
S5, start rolling temperature are 1100 DEG C, and finishing temperature is 1000 DEG C；Continuous rolling is into required specification rod iron, Ran Houkong
It is cooled to room temperature；
S6, the temperature of heating are 870 DEG C, and soaking time is 30min；
S7, water-cooled temperature are 80 DEG C, and the water-cooled time is 30min；
S8, the temperature of temper are 350 DEG C, and soaking time is 80min, obtains final products.
S9, chemical composition and quality using the obtained pole steel of the desk-top full spectrum direct-reading spectrometer measurements of CX-9000
Percentage is：0.22%C；2.24%Mn；1.46%Si；0.70%Cr；0.12%V；Balance of iron, wherein, the matter of Mn and Si
Amount is than being Mn:Si=1.53.
S10, according to GB/T228.1-2010《Metal material stretching test Part I：Room temperature test method》Regulation,
The pole steel obtained using above-mentioned technique makes 15 standard specimens of a diameter of 10mm respectively, using 1000kN electro-hydraulic servos ten thousand
Energy testing machine measures the mechanical property of sample, measures following result：
Tensile strength：Average value 1790MPa (measured value scopes：1775MPa to 1800MPa)；
Yield strength：Average value 1435MPa (measured value scopes：1420MPa to 1445MPa)；
Elongation percentage：Average value 17.8% (measured value scope 17.0% to 18.6%).
Strength and ductility product：Average value 31.86GPa%.
Embodiment 2
Other steps are with embodiment 1, difference：
In step s 2, ferroalloy is Antaciron (FeSi75), manganeisen (FeMn68C4.0), ferrochrome
(FeCr50 C1.0) and vanadium iron (FeV50), weight is respectively 2100Kg, 3300Kg, 1460Kg, 220Kg；Remaining is
102.92 tons of molten iron；
In step s 5, start rolling temperature is 1050 DEG C, and finishing temperature is 950 DEG C；In step s 6, heating-up temperature is 900
DEG C, soaking time is 28min；
In the step s 7, water-cooled temperature is 50 DEG C, and the duration is 30min；
In step s 8, temperature is 200 DEG C, and soaking time is 100min.
In step s 9, the chemical composition and mass percent of pole steel are：0.20%C；2.20%Mn；1.50%
Si；0.68%Cr；0.12%V；Balance of iron, wherein, the mass ratio of Mn and Si is Mn:Si=1.47.
In step slo, mechanical property is：
Tensile strength：Average value 1785MPa (measured value scopes：1765MPa to 1800MPa)；
Yield strength：Average value 1455MPa (measured value scopes：1430MPa to 1475MPa)；
Elongation percentage：Average value 18.0% (measured value scope 17.3% to 18.8%).
Strength and ductility product：Average value 32.13GPa%.
Embodiment 3
Other steps are with embodiment 1, difference：
In step s 2, ferroalloy is Antaciron (FeSi75), manganeisen (FeMn68C4.0), ferrochrome
(FeCr50 C1.0) and vanadium iron (FeV50), weight is respectively 2160Kg, 3700Kg, 1550Kg, 210Kg；Remaining is
102.38 tons of molten iron；
In step s 5, start rolling temperature is 1080 DEG C, and finishing temperature is 990 DEG C；In step s 6, heating-up temperature is 850
DEG C, soaking time is 35min；
In the step s 7, water-cooled temperature is 70 DEG C, and the duration is 20min；
In step s 8, temperature is 300 DEG C, and soaking time is 120min.
In step s 9, the chemical composition and mass percent of pole steel are：0.18%C；2.28%Mn；1.51%
Si；0.73%Cr；0.10%V；Balance of iron, wherein, the mass ratio of Mn and Si is Mn:Si=1.52.
In step slo, mechanical property is：
Tensile strength：Average value 1810MPa (measured value scopes：1785MPa to 1825MPa)；
Yield strength：Average value 1465MPa (measured value scopes：1425MPa to 1485MPa)；
Elongation percentage：Average value 16.9% (measured value scope 17.0% to 18.6%).
Strength and ductility product：Average value 30.59GPa%.
Embodiment 4
Other steps are with embodiment 1, difference：
In step s 2, ferroalloy is Antaciron (FeSi75), manganeisen (FeMn68C4.0), ferrochrome
(FeCr50 C1.0) and vanadium iron (FeV50), weight is respectively 2000Kg, 3200Kg, 1350Kg, 195Kg；Remaining is
103.26 tons of molten iron；
In step s 5, start rolling temperature is 1100 DEG C, and finishing temperature is 1000 DEG C；
In step s 6, heating-up temperature is 880 DEG C, and soaking time is 30min；
In the step s 7, water-cooled temperature is 60 DEG C, and the duration is 5min；
In step s 8, temperature is 250 DEG C, and soaking time is 20min.
In step s 9, the chemical composition and mass percent of pole steel are：0.21%C；2.05%Mn；1.89%
Si；0.62%Cr；0.08%V；Balance of iron, wherein, the mass ratio of Mn and Si is Mn:Si=1.08.
In step slo, mechanical property：
Tensile strength：Average value 1760MPa (measured value scopes：1735MPa to 1780MPa)；
Yield strength：Average value 1415MPa (measured value scopes：1400MPa to 1445MPa)；
Elongation percentage：Average value 18.8% (measured value scope 17.6% to 19.6%).
Strength and ductility product：Average value 33.09GPa%.
By test, Steel Bar obtained in method provided by the present invention has intensity higher, and also tool
There is preferable plasticity.
Those skilled in the art will readily occur to other embodiment party of the invention after specification and the practice present invention is considered
Case.The application is intended to any modification of the invention, purposes or adaptations, these modifications, purposes or adaptability
Change follows general principle of the invention and the common knowledge or usual skill in the art do not invented including the present invention
Art means.Description and embodiments are considered only as exemplary, and true scope and spirit of the invention are by following claim
Point out.
Unaccomplished matter of the present invention is known technology.
Claims (4)
1. a kind of Steel Bar, it is characterized by the composition of the Steel Bar includes the chemical composition of following mass percent：
C：0.15% to 0.35%；Mn：2.00% to 3.50%；Si：1.00% to 2.5%；Cr：0.10% to 0.85%；
V：0.01% to 0.12%；The mass ratio of Mn and Si is between 1.05 to 1.65 in balance of Fe, and the Steel Bar.
2. the preparation method of Steel Bar as claimed in claim 1, it is characterized by comprising the following steps：
（1）According to the composition and ratio of described Steel Bar, blast-melted being blended into is bessemerized, obtain initial molten steel, added
Ferroalloy is to carrying out alloying in ladle, then carries out LF refining to the molten steel after the alloying, and described cast steel water is treated to obtain；
Described ferroalloy is Antaciron, manganeisen, ferrochrome and vanadium iron；
（2）To treat that cast steel water carries out continuous casting, obtain steel billet, i.e. Steel Bar.
3. a kind of rod iron as claimed in claim 2, it is characterized by being made up of the Steel Bar described in claim 1.
4. the preparation method of rod iron as claimed in claim 3, it is characterized by comprising the following steps：
（1）Steel billet is carried out into continuous rolling, required specification rod iron is rolled into；Wherein, start rolling temperature is 1100 DEG C to 1050 DEG C,
Finishing temperature is 950 DEG C to 1000 DEG C, then will roll rear product air cooling for room temperature；
（2）Roll product after cooling is heated to 850 DEG C to 900 DEG C, soaking time is 25min to 35min；Then water-cooled is extremely
50 DEG C to 350 DEG C, cool time is 5min to 20min；The product after cooling is carried out into temper again, temperature is 200
DEG C to 350 DEG C, soaking time is 20min to 120min, finally obtains required rod iron.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108315657A (en) * | 2018-05-08 | 2018-07-24 | 河北工业大学 | A kind of low cost ultra-high strength and toughness steel and preparation method thereof |
| CN109972024A (en) * | 2019-05-13 | 2019-07-05 | 中天钢铁集团有限公司 | A kind of preparation method of pinion steel Steel Bar and preparation method thereof and rod iron |
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| JP2003096541A (en) * | 2001-09-21 | 2003-04-03 | Kawasaki Steel Corp | High tensile hot dip galvanizing steel sheet and high tensile galvannealed steel sheet having excellent balance in strength and ductility, plating adhesion, and corrosion resistance |
| CN1509922A (en) * | 2002-12-25 | 2004-07-07 | 新日本制铁株式会社 | High-impact electric welding steel pipe |
| CN1477226A (en) * | 2003-08-01 | 2004-02-25 | 清华大学 | Medium-low carbon manganese system self-hardening bainite steel |
| CN101225499A (en) * | 2008-01-31 | 2008-07-23 | 上海交通大学 | Low-alloy super-strength multiphase steel and heat treatment method thereof |
| CN102534432A (en) * | 2012-01-10 | 2012-07-04 | 清华大学 | Method for manufacturing and tempering bainite wear-resistant steel and steel pipe |
| CN102517511A (en) * | 2012-01-11 | 2012-06-27 | 河北工业大学 | Steel for high-expansion-rate petroleum casing and method for manufacturing petroleum casing |
| CN103060678A (en) * | 2012-12-25 | 2013-04-24 | 钢铁研究总院 | Medium temperature deformation nanometer austenite enhanced plasticized steel and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108315657A (en) * | 2018-05-08 | 2018-07-24 | 河北工业大学 | A kind of low cost ultra-high strength and toughness steel and preparation method thereof |
| CN109972024A (en) * | 2019-05-13 | 2019-07-05 | 中天钢铁集团有限公司 | A kind of preparation method of pinion steel Steel Bar and preparation method thereof and rod iron |
| CN109972024B (en) * | 2019-05-13 | 2020-06-05 | 中天钢铁集团有限公司 | Steel for gear steel bar and preparation method thereof and preparation method of steel bar |
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| CN106929772B (en) | 2019-04-23 |
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