CN108913990A - A kind of 600MPa grade high-plasticity anchor pole reinforcing bar and production method - Google Patents
A kind of 600MPa grade high-plasticity anchor pole reinforcing bar and production method Download PDFInfo
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- CN108913990A CN108913990A CN201810638094.3A CN201810638094A CN108913990A CN 108913990 A CN108913990 A CN 108913990A CN 201810638094 A CN201810638094 A CN 201810638094A CN 108913990 A CN108913990 A CN 108913990A
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- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 39
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 20
- 238000010438 heat treatment Methods 0.000 claims abstract description 45
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 32
- 239000010959 steel Substances 0.000 claims abstract description 32
- 238000000034 method Methods 0.000 claims abstract description 18
- 239000000203 mixture Substances 0.000 claims abstract description 16
- 238000005096 rolling process Methods 0.000 claims abstract description 15
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 14
- 229910052758 niobium Inorganic materials 0.000 claims abstract description 14
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 13
- 239000012535 impurity Substances 0.000 claims abstract description 13
- 238000009628 steelmaking Methods 0.000 claims abstract description 13
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 13
- 239000000126 substance Substances 0.000 claims abstract description 8
- 229910000859 α-Fe Inorganic materials 0.000 claims abstract description 7
- 229910001562 pearlite Inorganic materials 0.000 claims abstract description 3
- 238000010079 rubber tapping Methods 0.000 claims description 13
- 238000001816 cooling Methods 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 12
- 230000000694 effects Effects 0.000 description 6
- 230000008520 organization Effects 0.000 description 4
- 238000005728 strengthening Methods 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- -1 heating Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000010534 mechanism of action Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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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
-
- 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
- C21D8/06—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
- C21D8/08—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires for concrete reinforcement
-
- 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
-
- 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
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
-
- 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
-
- 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
- C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
-
- 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
-
- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/005—Ferrite
-
- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/009—Pearlite
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
The invention discloses a kind of 600MPa grade high-plasticity anchor pole reinforcing bar and production method, the anchor pole reinforcing bar chemical component composition and its mass percentage are：C：0.23~0.28%, Si：0.50~0.80%, Mn：1.30~1.60%, V：0.140~0.170%, Nb：0.010~0.040%, Cr≤0.15%, P≤0.040%, S≤0.040%, surplus are Fe and inevitable impurity；The production method includes steel-making, heating, steel rolling and heat treatment procedure.Anchor pole reinforcing bar tissue of the present invention is ferrite+pearlite, grain size >=10 grade；Yield strength Rel >=600MPa, tensile strength Rm >=810MPa, elongation after fracture A >=23%, impact property Akv2 >=100J；Simple production process, product have the characteristics that intensity and plasticity no-float.
Description
Technical field
The invention belongs to metallurgical technology fields, and in particular to a kind of 600MPa grade high-plasticity anchor pole reinforcing bar and production method.
Background technique
Overwhelming majority roadway uses 335/400MPa grades of common bolt at present, and intensity reaches 600MPa grades, and tension is strong
810MPa or more is spent, elongation percentage is not less than 23%, and ballistic work is not less than high-strength, the high-ductility anchor pole reinforcing bar of 100J, rarely has at home
Report, it is also higher and higher to the intensity and toughness reguirements of anchor pole reinforcing bar with being continuously increased for home and abroad pit mining depth,
The product will be widely applied.
Summary of the invention：
The technical problem to be solved in the present invention is to provide a kind of 600MPa grade high-plasticity anchor pole reinforcing bar and production methods.
In order to solve the above technical problems, the technical solution adopted by the present invention is that：A kind of 600MPa grade high-plasticity anchor pole reinforcing bar,
The anchor pole reinforcing bar chemical component composition and its mass percentage are：C：0.23~0.28%, Si：0.50~0.80%, Mn：
1.30~1.60%, V：0.140~0.170%, Nb：0.010~0.040%, Cr≤0.15%, P≤0.040%, S≤0.040% are remaining
Amount is Fe and inevitable impurity.
Each chemical component composition of the present invention and the mechanism of action：
C can play solution strengthening effect, improve steel strength, but C content is excessively high to influence plasticity, through practicing, C mass fraction
It is 0.23~0.28%.
Si can play solution strengthening effect, improve steel strength, but Si too high levels can influence plasticity, through practicing, Si
Mass fraction is 0.50~0.80%.
Mn can play solution strengthening effect, significantly improve steel strength, but Mn too high levels can influence plasticity, through reality
It tramples, Mn mass fraction is 1.30~1.60%.
V is main intensified element, and the C/N compound of formation has strong pinning effect to crystal boundary and dislocation, and can
Smart grain is refined, intensity can be significantly improved, increases plasticity, improves toughness, because excessively high V rises the reason of meltage and amount of precipitation
Less than effect, through practicing, V mass fraction is 0.140~0.170%.
The C/N compound of Nb has higher Precipitation Temperature, and strong pinning effect is played to crystal boundary, can refine essence
Grain, plays the role of refined crystalline strengthening, and can improve plasticity, increases toughness, Nb content is more than 0.04%, is no longer worked, through reality
It tramples, Nb mass fraction is 0.010~0.040%.
Cr member is known as very strong harden ability, the excessively high Cr element of mass fraction, and with credit union tissue shape occurs for same Mn, Nb element
Looks are abnormal, damage steel plasticity, through practicing, Cr mass fraction Cr≤0.15%.
S/P is harmful element, damages steel plasticity, and cost can be increased significantly by crossing low content, through practicing, S/P mass fraction
≤0.040%。
Anchor pole reinforcing bar tissue of the present invention is ferrite+pearlite, grain size >=10 grade.
Anchor pole reinforcing bar of the present invention：Yield strength Rel >=600MPa, tensile strength Rm >=810MPa, elongation after fracture A
>=23%, impact property Akv2 >=100J.
The present invention also provides a kind of production method of 600MPa grade high-plasticity anchor pole reinforcing bar, the production method includes refining
Steel, heating, steel rolling and heat treatment procedure.
Steel making working procedure of the present invention, tapping ladle chemistry composition and its mass percentage are：C：0.23~
0.28%, Si：0.50~0.80%, Mn：1.30~1.60%, V：0.140~0.170%, Nb：0.010~0.040%, Cr≤
0.15%, P≤0.040%, S≤0.040%, surplus are Fe and inevitable impurity.
Heating process of the present invention, tapping temperature is 1020~1080 DEG C after blank heating.
Steel rolling process of the present invention, uses Water cooling, hydraulic pressure 0.7-2.0MPa after finish to gauge, upper cold bed throws steel temperature and is
850~950 DEG C, heap is cold >=12h after be heat-treated.
Heat treatment procedure of the present invention, heating temperature are 100~500 DEG C, keep the temperature 5~20h.
Production technology of the present invention formulates foundation：
Rolling rear Water cooling can inhibit to recrystallize, and refine smart grain, increase intensity, improve plasticity, improve toughness, avoid tissue different
Often, through practicing, it is 850-950 DEG C that upper cold bed, which throws steel temperature,.
It being heat-treated after heap is cold, atomic diffusion rates can be accelerated, the higher atom of distortion energy has diffusivity,
Distortion energy is reduced, can be improved plasticity, improves toughness, excessive temperature increases cost, reduces steel strength, is practiced, and heating is warm
Degree is 100~500 DEG C, keeps the temperature 5~20h.
600MPa grade high-plasticity anchor pole reinforcing bar product standard of the present invention refers to YB/T4364；Product inspection method refers to GB/
T228.1。
Generated beneficial effect is by adopting the above technical scheme：1, the present invention is in steelmaking process control composition, control
Blank tapping temperature is 1020~1080 DEG C, and Water cooling is used after rolling, and it is 850~950 DEG C that upper cold bed, which throws steel temperature, forms iron
Ferritic+pearlitic structrure, and it is able to suppress recrystallization, refine smart grain, grain size >=10 grade.2, the present invention is in cold laggard of heap
Row heat treatment, control heating temperature are 100~500 DEG C, keep the temperature 5~20h, improve plasticity while proof strength.3, this hair
Bright anchor pole reinforcing bar yield strength Rel >=600MPa, tensile strength Rm >=810MPa, elongation after fracture A >=23%, impact property
Akv2≥100J.4, present invention process is simple, and product has the characteristics that intensity and plasticity no-float.
Detailed description of the invention
Fig. 1 is the 600MPa grade high-plasticity anchor pole reinforcing bar organization chart of embodiment 1；
Fig. 2 is the 600MPa grade high-plasticity anchor pole reinforcing bar organization chart of embodiment 2；
Fig. 3 is the 600MPa grade high-plasticity anchor pole reinforcing bar organization chart of embodiment 3；
Fig. 4 is the 600MPa grade high-plasticity anchor pole reinforcing bar organization chart of embodiment 4.
Specific embodiment
The present invention will be further described in detail in the following with reference to the drawings and specific embodiments.
Embodiment 1
The present embodiment 600MPa grade high-plasticity anchor pole reinforcing bar chemical component composition and its mass percentage are：C：0.23%, Si：
0.80%, Mn：1.60%, V：0.150%, Nb：0.025%, Cr：0.15%, P：0.022%, S：0.016%, surplus is Fe and can not keep away
The impurity exempted from.
The present embodiment 600MPa grade high-plasticity anchor pole method for producing steel bar includes steel-making, heating, steel rolling and heat treatment procedure,
Specific process step is as described below：
（1）Steel-making：Tapping ladle chemistry composition and its mass percentage are：C：0.23%, Si：0.80%, Mn：1.60%,
V：0.150%, Nb：0.025%, Cr：0.15%, P：0.022%, S：0.016%, surplus is Fe and inevitable impurity；
（2）Heating：Tapping temperature is 1020 DEG C after blank heating；
（3）Steel rolling：Water cooling is used after finish to gauge, hydraulic pressure 0.7MPa, it is 950 DEG C that upper cold bed, which throws steel temperature, and the cold 12h's of heap is laggard
Row heat treatment；
（4）Heat treatment：Being heat-treated heating temperature is 100 DEG C, keeps the temperature 20h.
The present embodiment 600MPa grade high-plasticity anchor pole reinforcing bar tissue is ferrite+pearlitic structrure, 11 grades of grain size, is organized
Figure is shown in Fig. 1；Performance indicator：Yield strength Rel：665MPa, tensile strength Rm：825MPa, elongation after fracture A：26%, impact
It can Akv2：132J.
Embodiment 2
The present embodiment 600MPa grade high-plasticity anchor pole reinforcing bar chemical component composition and its mass percentage are：C：0.28%, Si：
0.50%, Mn：1.30%, V：0.170%, Nb：0.010%, Cr：0.08%, P：0.032%, S：0.036%, surplus is Fe and can not keep away
The impurity exempted from.
The present embodiment 600MPa grade high-plasticity anchor pole method for producing steel bar includes steel-making, heating, steel rolling and heat treatment procedure,
Specific process step is as described below：
（1）Steel-making：Tapping ladle chemistry composition and its mass percentage are：C：0.28%, Si：0.50%, Mn：1.30%,
V：0.170%, Nb：0.010%, Cr：0.08%, P：0.032%, S：0.036%, surplus is Fe and inevitable impurity；
（2）Heating：Tapping temperature is 1080 DEG C after blank heating；
（3）Steel rolling：Water cooling is used after finish to gauge, hydraulic pressure 2.0MPa, it is 850 DEG C that upper cold bed, which throws steel temperature, and the cold 30h's of heap is laggard
Row heat treatment；
（4）Heat treatment：Being heat-treated heating temperature is 500 DEG C, keeps the temperature 5h.
The present embodiment 600MPa grade high-plasticity anchor pole reinforcing bar tissue is ferrite+pearlitic structrure, 12 grades of grain size, is organized
Figure is shown in Fig. 2；Performance indicator：Yield strength Rel：690MPa, tensile strength Rm：845MPa, elongation after fracture A：25%, impact
It can Akv2：116J.
Embodiment 3
The present embodiment 600MPa grade high-plasticity anchor pole reinforcing bar chemical component composition and its mass percentage are：C：0.25%, Si：
0.65%, Mn：1.50%, V：0.160%, Nb：0.040%, Cr：0.04%, P：0.026%, S：0.021%, surplus is Fe and can not keep away
The impurity exempted from.
The present embodiment 600MPa grade high-plasticity anchor pole method for producing steel bar includes steel-making, heating, steel rolling and heat treatment procedure,
Specific process step is as described below：
（1）Steel-making：Tapping ladle chemistry composition and its mass percentage are：C：0.25%, Si：0.65%, Mn：1.50%,
V：0.160%, Nb：0.040%, Cr：0.04%, P：0.026%, S：0.021%, surplus is Fe and inevitable impurity；
（2）Heating：Tapping temperature is 1050 DEG C after blank heating；
（3）Steel rolling：Water cooling is used after finish to gauge, hydraulic pressure 1.4MPa, it is 900 DEG C that upper cold bed, which throws steel temperature, and the cold 40h's of heap is laggard
Row heat treatment；
（4）Heat treatment：Being heat-treated heating temperature is 300 DEG C, keeps the temperature 10h.
The present embodiment 600MPa grade high-plasticity anchor pole reinforcing bar tissue be ferrite+pearlitic structrure, 12.5 grades of grain size, group
It knits figure and sees Fig. 3；Performance indicator：Yield strength Rel：675MPa, tensile strength Rm：835MPa, elongation after fracture A：26%, impact
Performance Akv2：131J.
Embodiment 4
The present embodiment 600MPa grade high-plasticity anchor pole reinforcing bar chemical component composition and its mass percentage are：C：0.27%, Si：
0.58%, Mn：1.40%, V：0.140%, Nb：0.020%, Cr：0.10%, P：0.040%, S：0.040%, surplus is Fe and can not keep away
The impurity exempted from.
The present embodiment 600MPa grade high-plasticity anchor pole method for producing steel bar includes steel-making, heating, steel rolling, heat treatment procedure,
Specific process step is as described below：
（1）Steel-making：Tapping ladle chemistry composition and its mass percentage are：C：0.27%, Si：0.58%, Mn：1.40%,
V：0.140%, Nb：0.020%, Cr：0.10%, P：0.040%, S：0.040%, surplus is Fe and inevitable impurity；
（2）Heating：Tapping temperature is 1040 DEG C after blank heating；
（3）Steel rolling：Water cooling is used after finish to gauge, hydraulic pressure 1.6MPa, it is 880 DEG C that upper cold bed, which throws steel temperature, and the cold 60h's of heap is laggard
Row heat treatment；
（4）Heat treatment：Being heat-treated heating temperature is 200 DEG C, keeps the temperature 15h.
The present embodiment 600MPa grade high-plasticity anchor pole reinforcing bar tissue be ferrite+pearlitic structrure, 10.5 grades of grain size, group
It knits figure and sees Fig. 4；Performance indicator：Yield strength Rel：655MPa, tensile strength Rm：820MPa, elongation after fracture A：25%, impact
Performance Akv2：128J.
The above embodiments are only used to illustrate and not limit the technical solutions of the present invention, although referring to above-described embodiment to this hair
It is bright to be described in detail, those skilled in the art should understand that：Still the present invention can be modified or be waited
With replacement, without departing from the spirit or scope of the invention, or any substitutions, should all cover in power of the invention
In sharp claimed range.
Claims (8)
1. a kind of 600MPa grade high-plasticity anchor pole reinforcing bar, which is characterized in that the anchor pole reinforcing bar chemical component composition and its quality
Percentage composition is：C：0.23~0.28%, Si：0.50~0.80%, Mn：1.30~1.60%, V：0.140~0.170%, Nb：
0.010~0.040%, Cr≤0.15%, P≤0.040%, S≤0.040%, surplus are Fe and inevitable impurity.
2. a kind of 600MPa grade high-plasticity anchor pole reinforcing bar according to claim 1, which is characterized in that the anchor pole reinforcing bar group
It is woven to ferrite+pearlite, grain size >=10 grade.
3. a kind of 600MPa grade high-plasticity anchor pole reinforcing bar according to claim 1, which is characterized in that the anchor pole reinforcing bar：
Yield strength Rel >=600MPa, tensile strength Rm >=810MPa, elongation after fracture A >=23%, impact property Akv2 >=100J.
4. special based on a kind of production method of 600MPa grade high-plasticity anchor pole reinforcing bar described in claim 1-3 any one
Sign is that the production method includes steel-making, heating, steel rolling and heat treatment procedure.
5. a kind of production method of 600MPa grade high-plasticity anchor pole reinforcing bar according to claim 4, which is characterized in that described
Steel making working procedure, tapping ladle chemistry composition and its mass percentage are：C：0.23~0.28%, Si：0.50~0.80%,
Mn：1.30~1.60%, V：0.140~0.170%, Nb：0.010~0.040%, Cr≤0.15%, P≤0.040%, S≤
0.040%, surplus is Fe and inevitable impurity.
6. a kind of production method of 600MPa grade high-plasticity anchor pole reinforcing bar according to claim 4, which is characterized in that described
Heating process, tapping temperature is 1020~1080 DEG C after blank heating.
7. a kind of production method of 600MPa grade high-plasticity anchor pole reinforcing bar according to claim 4-6 any one, special
Sign is, the steel rolling process, uses Water cooling, hydraulic pressure 0.7-2.0MPa after finish to gauge, upper cold bed throw steel temperature be 850~
950 DEG C, heap is cold >=12h after be heat-treated.
8. a kind of production method of 600MPa grade high-plasticity anchor pole reinforcing bar according to claim 4-6 any one, special
Sign is that the heat treatment procedure, heating temperature is 100~500 DEG C, keeps the temperature 5~20h.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111945074A (en) * | 2020-08-28 | 2020-11-17 | 安徽吾兴新材料有限公司 | 635 MPa-grade high-strength anti-seismic reinforcing steel bar and preparation method thereof |
| CN112210714A (en) * | 2020-09-01 | 2021-01-12 | 陕钢集团产业创新研究院有限公司 | High-strength anti-seismic reinforcing steel bar with yield strength of more than 650MPa and production method thereof |
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| CN111945074A (en) * | 2020-08-28 | 2020-11-17 | 安徽吾兴新材料有限公司 | 635 MPa-grade high-strength anti-seismic reinforcing steel bar and preparation method thereof |
| CN112210714A (en) * | 2020-09-01 | 2021-01-12 | 陕钢集团产业创新研究院有限公司 | High-strength anti-seismic reinforcing steel bar with yield strength of more than 650MPa and production method thereof |
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