CN109136744A - A kind of corrosion resistant cement is laid bricks particular manufacturing craft steel plate and its production method - Google Patents
A kind of corrosion resistant cement is laid bricks particular manufacturing craft steel plate and its production method Download PDFInfo
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- CN109136744A CN109136744A CN201810771841.0A CN201810771841A CN109136744A CN 109136744 A CN109136744 A CN 109136744A CN 201810771841 A CN201810771841 A CN 201810771841A CN 109136744 A CN109136744 A CN 109136744A
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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
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0226—Hot rolling
-
- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0081—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for slabs; for billets
-
- 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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
-
- 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)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
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- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
It lays bricks particular manufacturing craft steel plate and its production method the present invention relates to a kind of corrosion resistant cement, belongs to technical field of steel production.The composition by weight percent of the steel plate forms: C 0.13%~0.20%, Si 0.60%~0.80%, Mn 1.30%~1.50%, P≤0.005%, S≤0.002%, Al 0.20%~0.40%, Cr 0.60%~0.80%, Cu 0.15%~0.30%, Ni0.30%~0.50%, surplus are Fe and inevitable impurity.The production method includes smelting, continuous casting, heating, rolling, thermal reactor pile and heat treatment procedure.The present invention improves Si constituent content by addition Cr, Cu and has obtained the institutional framework of fine uniform by normalizing+tempering, while ensuring that surface of steel plate hardness is uniform, ensure that the corrosion resistance of steel plate.
Description
Technical field
It lays bricks particular manufacturing craft steel plate and its production method the present invention relates to a kind of corrosion resistant cement, belongs to steel production skill
Art field.
Background technique
Cement is laid bricks as environment-friendly type building material at low cost, easy to produce, and it is wide to be widely used in urban road, garden
Among the construction such as field, parking lot, factory's road.With China city, the rapid development of factory construction, demand is also increasingly
Greatly.According to market survey, domestic cement lays bricks and mainly uses NM320 steel plate with mould steel, and annual requirement is up to nearly ten thousand tons.So
And since cement concrete has certain corrosive nature, cement is laid bricks with mold due to corrosion in process of production, needs frequency
Numerous replacement, not only reduces production efficiency, also creates the waste of mould steel, increases production cost.For a long time, due to lacking
The mature experience of weary necessary technical support and production corrosion resistant mould steel plate causes the mold steel plate of the supply of material or because of hardness requirement
Excessively high and processing difficulties lead to well damage because corrosion resistance is lower, seriously constrain the development of the development of the national economy.
Summary of the invention
It lays bricks particular manufacturing craft steel plate the technical problem to be solved in the present invention is to provide a kind of corrosion resistant cement, the present invention is also
The production method that a kind of corrosion resistant cement lays bricks particular manufacturing craft steel plate is provided.
In order to solve the above technical problems, technical solution provided by the invention are as follows:
A kind of corrosion resistant cement is laid bricks particular manufacturing craft steel plate, the chemical component composition and weight percentage of the steel plate are as follows: C
0.13%~0.20%, Si 0.60%~0.80%, Mn 1.30%~1.50%, P≤0.005%, S≤0.002%, Al 0.20%~
0.40%, Cr 0.60%~0.80%, Cu 0.15%~0.30%, Ni0.30%~0.50%, surplus be Fe and inevitably it is miscellaneous
Matter.
Steel plate thickness of the present invention is 8~100mm, and the surface hardness of steel plate is 160~210HBW.
Steel plate of the present invention is the complex tissue of ferrite and pearlite, steel plate grain size >=7 grade.
It lays bricks the production method of particular manufacturing craft steel plate the present invention also provides a kind of corrosion resistant cement comprising smelt,
Continuous casting, heating, rolling, thermal reactor pile and heat treatment procedure；The heat treatment procedure uses normalizing+tempering process；The smelter
The chemical component composition and weight percentage of molten steel in sequence are as follows: C 0.13%~0.20%, Si 0.60%~0.80%, Mn
1.30%~1.50%, P≤0.005%, S≤0.002%, Al 0.20%~0.40%, Cr 0.60%~0.80%, Cu 0.15%~
0.30%, Ni0.30%~0.50%, surplus are Fe and inevitable impurity.
Smelting procedure described in the method for the present invention is that molten steel is sent into the refining of LF furnace after the smelting of first furnace, then to be transferred to VD furnace true
Empty degassing process, vacuum degree≤66MPa during the VD furnace Fruit storage, vacuum retention time are 15~20min.
Heating process maximum heating temperature described in the method for the present invention is 1250 DEG C, and soaking temperature is 1150~1220 DEG C, always
Heating time is 10~12min/cm slab thickness.
Rolling process described in the method for the present invention use Π type controlled rolling process, 1050~1100 DEG C of first stage start rolling temperature,
Dry in the air steel thickness >=2h；It 850~900 DEG C of second stage start rolling temperature, rolls rear air-cooled；The h is finished steel plate thickness.
Heat treatment procedure normalizing temperature described in the method for the present invention is 880~910 DEG C, 1.5~2.5min/mm of soaking time,
It comes out of the stove air-cooled；Tempering temperature is 650~710 DEG C, and soaking time is 4~4.5min/mm, is come out of the stove air-cooled.
The present invention by addition Cr, Cu, Ni, reduce harmful element P, S content, improve Si constituent content, by normalizing+return
Fire processing, has obtained the institutional framework of fine uniform, while ensuring that surface of steel plate hardness is uniform, ensure that the corrosion resistant of steel plate
Corrosion energy.Steel plate group is woven to ferrite+pearlite line and staff control, and 7 grades of grain size or more, the surface hardness of steel plate is 160~
210HBW, ultrasonic inspection plate quality meet GB/T's 2970Grade requires.Three-body impact wear resistance comparative experiments shows
Cement of the invention lays bricks particular manufacturing craft steel plate compared with NM320 steel plate, has better corrosion resistance.
Detailed description of the invention
Fig. 1 is the metallographic structure figure of 1 steel plate of present example；
Fig. 2 is the metallographic structure figure of 2 steel plate of present example；
Fig. 3 is the metallographic structure figure of 3 steel plate of present example.
Specific embodiment
The present invention will be further described in detail with reference to the specific embodiments.
The lay bricks production method of particular manufacturing craft steel plate of this corrosion resistant cement includes smelting, continuous casting, heating, rolling, thermal reactor
Pile and heat treatment procedure, the technique of each process are as follows:
(1) smelting procedure: molten steel is sent into the refining of LF furnace after the smelting of first furnace, then is transferred to VD furnace Fruit storage, the VD
Vacuum degree≤66MPa during furnace Fruit storage, vacuum retention time are 15~20min, it is ensured that field trash, gas have
Effect excludes, and guarantees the pure of molten steel.The chemical component of molten steel forms and weight percentage are as follows: C 0.13%~0.20%, Si
0.60%~0.80%, Mn 1.30%~1.50%, P≤0.005%, S≤0.002%, Al 0.20%~0.40%, Cr 0.60%~
0.80%, Cu 0.15%~0.30%, Ni0.30%~0.50%, surplus are Fe and inevitable impurity；
(2) continuous casting working procedure: the molten steel after smelting is cast, and continuous casting billet is obtained.Wherein needed for finished product thickness≤65mm steel plate
Slab thickness is not less than 200mm, and finished product thickness is that required slab thickness needed for the steel plate of 65mm~100mm is not less than 300mm；
(3) heating process: maximum heating temperature be 1250 DEG C, soaking temperature be 1150~1220 DEG C, total heating time be 10~
12min/cm slab thickness；
(4) rolling process: using Π type controlled rolling process, and 1050~1100 DEG C of first stage start rolling temperature, dry in the air steel thickness >=2h, the
It 850~900 DEG C of two-stage rolling temperature, rolls rear air-cooled；The h is finished steel plate thickness；
(5) thermal reactor pile process: steel plate uses expansion hydrogen technique to carry out expansion hydrogen to steel plate after rolling；
(6) heat treatment procedure: using normalizing+tempering process, and normalizing temperature is 880~910 DEG C, 1.5~2.5min/ of soaking time
Mm comes out of the stove air-cooled；Tempering temperature is 650~710 DEG C, and soaking time is 4~4.5min/mm, is come out of the stove air-cooled.
Embodiment 1
This corrosion resistant cement lay bricks particular manufacturing craft steel plate production technology it is as described below:
(1) smelt: molten steel is sent into LF refining furnace refining, is then transferred to VD furnace Fruit storage, VD furnace after the smelting of first furnace
Vacuum degree be 65.7MPa, vacuum retention time 16min.The chemical component of molten steel forms and weight percentage is shown in Table 1；
(2) molten steel after smelting continuous casting: is cast into continuous casting billet, slab thickness 200mm；
(3) heat: 1250 DEG C of slab maximum heating temperature, 1210 DEG C of soaking temperature, total heating time is 220min；
(4) it rolls: using Π type controlled rolling process, first stage start rolling temperature is 1070 DEG C, and the steel that dries in the air is with a thickness of 35mm, second stage
Start rolling temperature is 870 DEG C, is rolled rear air-cooled；
(5) thermal reactor pile: steel plate uses expansion hydrogen technique to carry out expansion hydrogen to steel plate after rolling；
(6) be heat-treated: steel plate obtains finished steel plate after normalizing+tempering.Normalizing temperature is 880 DEG C, soaking time 1.6min/
Mm comes out of the stove air-cooled.Tempering temperature is 660 DEG C, and soaking time 4.1min/mm comes out of the stove air-cooled.
Steel plate thickness obtained by the present embodiment is 8mm, and surface of steel plate hardness is 180HBW, and ultrasonic inspection plate quality meets
GB/T's 2970Grade requires, and metallographic structure ferrite+pearlite as shown in Figure 1, be made of, 9 grades of grain size.With NM320
The three-body impact wear resistance comparative experiments of steel plate is shown in Table 2.
Embodiment 2
This corrosion resistant cement lay bricks particular manufacturing craft steel plate production technology it is as described below:
(1) smelt: molten steel is sent into LF refining furnace refining, is then transferred to VD furnace Fruit storage, VD furnace after the smelting of first furnace
Vacuum degree be 64.8MPa, vacuum retention time 17min, it is ensured that effective exclusion of field trash, gas guarantees the pure of molten steel.
The chemical component of molten steel forms and weight percentage is shown in Table 1；
(2) molten steel after smelting continuous casting: is cast into continuous casting billet, slab thickness 200mm；
(3) heat: 1230 DEG C of slab maximum heating temperature, 1220 DEG C of soaking temperature, total heating time is 210min；
(4) it rolls: using Π type controlled rolling process, first stage start rolling temperature is 1090 DEG C, and the steel that dries in the air is with a thickness of 135mm, second-order
Section start rolling temperature is 890 DEG C, is rolled rear air-cooled；
(5) thermal reactor pile: steel plate uses expansion hydrogen technique to carry out expansion hydrogen to steel plate after rolling.
(6) be heat-treated: steel plate obtains finished steel plate after normalizing+tempering.Normalizing temperature is 890 DEG C, soaking time
1.8min/mm comes out of the stove air-cooled.Tempering temperature is 690 DEG C, and soaking time 4.3min/mm comes out of the stove air-cooled.
Steel plate thickness obtained by the present embodiment is 60mm, and surface of steel plate hardness is 195HBW, and ultrasonic inspection plate quality is full
Sufficient GB/T's 2970Grade requires, and metallographic structure ferrite+pearlite as shown in Fig. 2, be made of, 10 grades of grain size.With
The three-body impact wear resistance comparative experiments of NM320 steel plate is shown in Table 2.
Embodiment 3
This corrosion resistant cement lay bricks particular manufacturing craft steel plate production technology it is as described below:
(1) smelt: molten steel is sent into LF refining furnace refining, is then transferred to VD furnace Fruit storage, VD furnace after the smelting of first furnace
Vacuum degree be 65.6MPa, vacuum retention time 19min, it is ensured that effective exclusion of field trash, gas guarantees the pure of molten steel.
The chemical component of molten steel forms and weight percentage is shown in Table 1.
(2) molten steel after smelting continuous casting: is cast into continuous casting billet, slab thickness 300mm.
(3) heat: 1220 DEG C of slab maximum heating temperature, 1190 DEG C of soaking temperature, total heating time is 340min.
(4) it rolling: using Π type controlled rolling process, first stage start rolling temperature is 1060 DEG C, and the steel that dries in the air is with a thickness of 210mm, the
Two-stage rolling temperature is 850 DEG C, is rolled rear air-cooled.
(5) thermal reactor pile: steel plate uses expansion hydrogen technique to carry out expansion hydrogen to steel plate after rolling.
(6) be heat-treated: steel plate obtains finished steel plate after normalizing+tempering.Normalizing temperature is 900 DEG C, soaking time
2.0min/mm comes out of the stove air-cooled.Tempering temperature is 710 DEG C, and soaking time 4.5min/mm comes out of the stove air-cooled.
Steel plate thickness obtained by the present embodiment is 100mm, and surface of steel plate hardness is 188HBW, and ultrasonic inspection plate quality is full
Sufficient GB/T's 2970Grade requires, and metallographic structure ferrite+pearlite as shown in figure 3, be made of, 10 grades of grain size.With
The three-body impact wear resistance comparative experiments of NM320 steel plate is shown in Table 2.
Embodiment 4
This corrosion resistant cement lay bricks particular manufacturing craft steel plate production technology it is as described below:
(1) smelt: molten steel is sent into LF refining furnace refining, is then transferred to VD furnace Fruit storage, VD furnace after the smelting of first furnace
Vacuum degree be 66MPa, vacuum retention time 15min, it is ensured that effective exclusion of field trash, gas guarantees the pure of molten steel.Steel
The chemical component of water forms and weight percentage is shown in Table 1.
(2) molten steel after smelting continuous casting: is cast into continuous casting billet, slab thickness 210mm.
(3) heat: 1245 DEG C of slab maximum heating temperature, 1170 DEG C of soaking temperature, total heating time is 110min.
(4) it rolling: using Π type controlled rolling process, first stage start rolling temperature is 1095 DEG C, and the steel that dries in the air is with a thickness of 80mm, second
Stage start rolling temperature is 860 DEG C, is rolled rear air-cooled.
(5) thermal reactor pile: steel plate uses expansion hydrogen technique to carry out expansion hydrogen to steel plate after rolling.
(6) be heat-treated: steel plate obtains finished steel plate after normalizing+tempering.Normalizing temperature is 880 DEG C, soaking time
1.6min/mm comes out of the stove air-cooled.Tempering temperature is 675 DEG C, and soaking time 4.2min/mm comes out of the stove air-cooled.
Steel plate thickness obtained by the present embodiment is 35mm, and surface of steel plate hardness is 185HBW, and ultrasonic inspection plate quality is full
Sufficient GB/T's 2970Grade requires, and metallographic structure is made of ferrite+pearlite, and 10 grades of grain size.With NM320 steel plate
Three-body impact wear resistance comparative experiments is shown in Table 2.
Embodiment 5
This corrosion resistant cement lay bricks particular manufacturing craft steel plate production technology it is as described below:
(1) smelt: molten steel is sent into LF refining furnace refining, is then transferred to VD furnace Fruit storage, VD furnace after the smelting of first furnace
Vacuum degree be 60MPa, vacuum retention time 15min, it is ensured that effective exclusion of field trash, gas guarantees the pure of molten steel.Steel
The chemical component of water forms and weight percentage is shown in Table 1.
(2) molten steel after smelting continuous casting: is cast into continuous casting billet, slab thickness 260mm.
(3) heat: 1250 DEG C of slab maximum heating temperature, 1220 DEG C of soaking temperature, total heating time is 280min.
(4) it rolling: using Π type controlled rolling process, first stage start rolling temperature is 1100 DEG C, and the steel that dries in the air is with a thickness of 130mm, the
Two-stage rolling temperature is 895 DEG C, is rolled rear air-cooled.
(5) thermal reactor pile: steel plate uses expansion hydrogen technique to carry out expansion hydrogen to steel plate after rolling.
(6) be heat-treated: steel plate obtains finished steel plate after normalizing+tempering.Normalizing temperature is 885 DEG C, soaking time
2.2min/mm comes out of the stove air-cooled.Tempering temperature is 710 DEG C, and soaking time 4.4min/mm comes out of the stove air-cooled.
Steel plate thickness obtained by the present embodiment is 61mm, and surface of steel plate hardness is 200HBW, and ultrasonic inspection plate quality is full
Sufficient GB/T's 2970Grade requires, and metallographic structure is made of ferrite+pearlite, and 9 grades of grain size.With the three of NM320 steel plate
Body impact wear resistance comparative experiments is shown in Table 2.
Embodiment 6
This corrosion resistant cement lay bricks particular manufacturing craft steel plate production technology it is as described below:
(1) smelt: molten steel is sent into LF refining furnace refining, is then transferred to VD furnace Fruit storage, VD furnace after the smelting of first furnace
Vacuum degree be 62.5MPa, vacuum retention time 18min, it is ensured that effective exclusion of field trash, gas guarantees the pure of molten steel.
The chemical component of molten steel forms and weight percentage is shown in Table 1.
(2) molten steel after smelting continuous casting: is cast into continuous casting billet, slab thickness 330mm.
(3) heat: 1200 DEG C of slab maximum heating temperature, 1150 DEG C of soaking temperature, total heating time is 300min.
(4) it rolling: using Π type controlled rolling process, first stage start rolling temperature is 1055 DEG C, and the steel that dries in the air is with a thickness of 180mm, the
Two-stage rolling temperature is 880 DEG C, is rolled rear air-cooled.
(5) thermal reactor pile: steel plate uses expansion hydrogen technique to carry out expansion hydrogen to steel plate after rolling.
(6) be heat-treated: steel plate obtains finished steel plate after normalizing+tempering.Normalizing temperature is 905 DEG C, soaking time
1.5min/mm comes out of the stove air-cooled.Tempering temperature is 650 DEG C, and soaking time 4.5min/mm comes out of the stove air-cooled.
Steel plate thickness obtained by the present embodiment is 87.5mm, and surface of steel plate hardness is 175HBW, ultrasonic inspection plate quality
Meet GB/T's 2970Grade requires, and metallographic structure is made of ferrite+pearlite, and 9.5 grades of grain size.With NM320 steel plate
Three-body impact wear resistance comparative experiments be shown in Table 2.
Embodiment 7
This corrosion resistant cement lay bricks particular manufacturing craft steel plate production technology it is as described below:
(1) smelt: molten steel is sent into LF refining furnace refining, is then transferred to VD furnace Fruit storage, VD furnace after the smelting of first furnace
Vacuum degree be 63.5MPa, vacuum retention time 20min, it is ensured that effective exclusion of field trash, gas guarantees the pure of molten steel.
The chemical component of molten steel forms and weight percentage is shown in Table 1.
(2) molten steel after smelting continuous casting: is cast into continuous casting billet, slab thickness 200mm.
(3) heat: 1195 DEG C of slab maximum heating temperature, 1180 DEG C of soaking temperature, total heating time is 60min.
(4) it rolling: using Π type controlled rolling process, first stage start rolling temperature is 1080 DEG C, and the steel that dries in the air is with a thickness of 55mm, second
Stage start rolling temperature is 855 DEG C, is rolled rear air-cooled.
(5) thermal reactor pile: steel plate uses expansion hydrogen technique to carry out expansion hydrogen to steel plate after rolling.
(6) be heat-treated: steel plate obtains finished steel plate after normalizing+tempering.Normalizing temperature is 907 DEG C, soaking time
2.5min/mm comes out of the stove air-cooled.Tempering temperature is 700 DEG C, and soaking time 4.0min/mm comes out of the stove air-cooled.
Steel plate thickness obtained by the present embodiment is 8mm, and surface of steel plate hardness is 190HBW, and ultrasonic inspection plate quality meets
GB/T's 2970Grade requires, and metallographic structure is made of ferrite+pearlite, and 10.5 grades of grain size.With NM320 steel plate
Three-body impact wear resistance comparative experiments is shown in Table 2.
Embodiment 8
This corrosion resistant cement lay bricks particular manufacturing craft steel plate production technology it is as described below:
(1) smelt: molten steel is sent into LF refining furnace refining, is then transferred to VD furnace Fruit storage, VD furnace after the smelting of first furnace
Vacuum degree be 66MPa, vacuum retention time 19min, it is ensured that effective exclusion of field trash, gas guarantees the pure of molten steel.Steel
The chemical component of water forms and weight percentage is shown in Table 1.
(2) molten steel after smelting continuous casting: is cast into continuous casting billet, slab thickness 200mm.
(3) heat: 1225 DEG C of slab maximum heating temperature, 1218 DEG C of soaking temperature, total heating time is 115min.
(4) it rolling: using Π type controlled rolling process, first stage start rolling temperature is 1050 DEG C, and the steel that dries in the air is with a thickness of 45mm, second
Stage start rolling temperature is 900 DEG C, is rolled rear air-cooled.
(5) thermal reactor pile: steel plate uses expansion hydrogen technique to carry out expansion hydrogen to steel plate after rolling.
(6) be heat-treated: steel plate obtains finished steel plate after normalizing+tempering.Normalizing temperature is 882 DEG C, soaking time
2.5min/mm comes out of the stove air-cooled.Tempering temperature is 650 DEG C, and soaking time 4.2min/mm comes out of the stove air-cooled.
Steel plate thickness obtained by the present embodiment is 21.5mm, and surface of steel plate hardness is 178HBW, ultrasonic inspection plate quality
Meet GB/T's 2970Grade requires, and metallographic structure is made of ferrite+pearlite, and 9 grades of grain size.With NM320 steel plate
Three-body impact wear resistance comparative experiments is shown in Table 2.
Embodiment 9
This corrosion resistant cement lay bricks particular manufacturing craft steel plate production technology it is as described below:
(1) smelt: molten steel is sent into LF refining furnace refining, is then transferred to VD furnace Fruit storage, VD furnace after the smelting of first furnace
Vacuum degree be 61MPa, vacuum retention time 16min, it is ensured that effective exclusion of field trash, gas guarantees the pure of molten steel.Steel
The chemical component of water forms and weight percentage is shown in Table 1.
(2) molten steel after smelting continuous casting: is cast into continuous casting billet, slab thickness 400mm.
(3) heat: 1180 DEG C of slab maximum heating temperature, 1155 DEG C of soaking temperature, total heating time is 400min.
(4) it rolling: using Π type controlled rolling process, first stage start rolling temperature is 1100 DEG C, and the steel that dries in the air is with a thickness of 230mm, the
Two-stage rolling temperature is 850 DEG C, is rolled rear air-cooled.
(5) thermal reactor pile: steel plate uses expansion hydrogen technique to carry out expansion hydrogen to steel plate after rolling.
(6) be heat-treated: steel plate obtains finished steel plate after normalizing+tempering.Normalizing temperature is 910 DEG C, soaking time
1.5min/mm comes out of the stove air-cooled.Tempering temperature is 707 DEG C, and soaking time 4.0min/mm comes out of the stove air-cooled.
Steel plate thickness obtained by the present embodiment is 100mm, and surface of steel plate hardness is 200HBW, and ultrasonic inspection plate quality is full
Sufficient GB/T's 2970Grade requires, and metallographic structure is made of ferrite+pearlite, and 10 grades of grain size.With NM320 steel plate
Three-body impact wear resistance comparative experiments is shown in Table 2.
Embodiment 10
This corrosion resistant cement lay bricks particular manufacturing craft steel plate production technology it is as described below:
(1) smelt: molten steel is sent into LF refining furnace refining, is then transferred to VD furnace Fruit storage, VD furnace after the smelting of first furnace
Vacuum degree be 62MPa, vacuum retention time 20min, it is ensured that effective exclusion of field trash, gas guarantees the pure of molten steel.Steel
The chemical component of water forms and weight percentage is shown in Table 1.
(2) molten steel after smelting continuous casting: is cast into continuous casting billet, slab thickness 300mm.
(3) heat: 1210 DEG C of slab maximum heating temperature, 1200 DEG C of soaking temperature, total heating time is 350min.
(4) it rolling: using Π type controlled rolling process, first stage start rolling temperature is 1050 DEG C, and the steel that dries in the air is with a thickness of 100mm, the
Two-stage rolling temperature is 890 DEG C, is rolled rear air-cooled.
(5) thermal reactor pile: steel plate uses expansion hydrogen technique to carry out expansion hydrogen to steel plate after rolling.
(6) be heat-treated: steel plate obtains finished steel plate after normalizing+tempering.Normalizing temperature is 910 DEG C, soaking time
2.4min/mm comes out of the stove air-cooled.Tempering temperature is 655 DEG C, and soaking time 4.4min/mm comes out of the stove air-cooled.
Steel plate thickness obtained by the present embodiment is 45mm, and surface of steel plate hardness is 205HBW, and ultrasonic inspection plate quality is full
Sufficient GB/T's 2970Grade requires, and metallographic structure is made of ferrite+pearlite, and 10.5 grades of grain size.With NM320 steel plate
Three-body impact wear resistance comparative experiments be shown in Table 2.
Table 1: embodiment 1-10 molten steel composition (wt%)
In table 1, surplus is Fe and inevitable impurity.
Table 2: three-body impact wear resistance comparative experiments situation
The experiment of three-body impact wear resistance:
(1) specimen size: 10mm × 10mm × 40mm, specimen size deviation and surface meet the requirement of GB229, and two sections must
It must be strictly vertical with side.
(2) ballistic work is 2J.
(3) frequency of impact is 100 times/min.
(4) abrasive material flow is 70Kg/h.
(5) abrasive material is 10 mesh quartz sands.
Using the solution B in NACE TM-0284 standard, first pre-grinding 15 minutes, the surface quality to ensure sample is consistent.
Then formal abrasion 30 minutes every time weigh to sample after abrasion, compare the weight difference of 2 samples.
It is above-mentioned the experimental results showed that, cement of the invention lays bricks particular manufacturing craft steel plate compared with NM320 steel plate, corrosion resistance
It can be good.
Claims (8)
- The particular manufacturing craft steel plate 1. a kind of corrosion resistant cement is laid bricks, it is characterised in that: the chemical component of the steel plate forms and again Measure percentage composition are as follows: C 0.13%~0.20%, Si 0.60%~0.80%, Mn 1.30%~1.50%, P≤0.005%, S≤ 0.002%, Al 0.20%~0.40%, Cr 0.60%~0.80%, Cu 0.15%~0.30%, Ni0.30%~0.50%, surplus are Fe and inevitable impurity.
- The particular manufacturing craft steel plate 2. a kind of corrosion resistant cement according to claim 1 is laid bricks, it is characterised in that: the steel plate With a thickness of 8~100mm, the surface hardness of steel plate is 160~210HBW.
- The particular manufacturing craft steel plate 3. a kind of corrosion resistant cement according to claim 1 or 2 is laid bricks, it is characterised in that: described Steel plate is the complex tissue of ferrite and pearlite, steel plate grain size >=7 grade.
- The production method of particular manufacturing craft steel plate 4. a kind of corrosion resistant cement is laid bricks, which is characterized in that it include smelting, continuous casting, Heating, rolling, thermal reactor pile and heat treatment procedure；The heat treatment procedure uses normalizing+tempering process；Steel in the smelting procedure The chemical component of water forms and weight percentage are as follows: and C 0.13%~0.20%, Si 0.60%~0.80%, Mn 1.30%~ 1.50%, P≤0.005%, S≤0.002%, Al 0.20%~0.40%, Cr 0.60%~0.80%, Cu 0.15%~0.30%, Ni0.30%~0.50%, surplus are Fe and inevitable impurity.
- The production method of particular manufacturing craft steel plate 5. corrosion resistant cement according to claim 4 is laid bricks, which is characterized in that institute Stating smelting procedure is that molten steel is sent into the refining of LF furnace after the smelting of first furnace, then is transferred to VD furnace Fruit storage, and the VD furnace is true Vacuum degree≤66MPa during empty degassing process, vacuum retention time are 15~20min.
- The production method of particular manufacturing craft steel plate 6. corrosion resistant cement according to claim 5 is laid bricks, which is characterized in that institute Stating heating process maximum heating temperature is 1250 DEG C, and soaking temperature is 1150~1220 DEG C, and total heating time is 10~12min/ Cm slab thickness.
- The production method of particular manufacturing craft steel plate 7. corrosion resistant cement according to claim 6 is laid bricks, which is characterized in that institute Rolling process is stated using Π type controlled rolling process, 1050~1100 DEG C of first stage start rolling temperature, dry in the air steel thickness >=2h；Second stage It 850~900 DEG C of start rolling temperature, rolls rear air-cooled；The h is finished steel plate thickness.
- 8. it is laid bricks the production method of particular manufacturing craft steel plate according to corrosion resistant cement described in claim 4-7 any one, It is characterized in that, the heat treatment procedure normalizing temperature is 880~910 DEG C, and 1.5~2.5min/mm of soaking time comes out of the stove air-cooled； Tempering temperature is 650~710 DEG C, and soaking time is 4~4.5min/mm, is come out of the stove air-cooled.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111549292A (en) * | 2020-05-29 | 2020-08-18 | 舞阳钢铁有限责任公司 | Low-cost high-alloy Cr-Mo pipe fitting steel plate and production method thereof |
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| CN104169018A (en) * | 2012-03-30 | 2014-11-26 | 株式会社神户制钢所 | Manufacturing method for hot press-molded steel member, and hot press-molded steel member |
| US20150225822A1 (en) * | 2012-09-19 | 2015-08-13 | Jfe Steel Corporation | Abrasion resistant steel plate having excellent low-temperature toughness and excellent corrosive wear resistance |
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| CN104169018A (en) * | 2012-03-30 | 2014-11-26 | 株式会社神户制钢所 | Manufacturing method for hot press-molded steel member, and hot press-molded steel member |
| US20150225822A1 (en) * | 2012-09-19 | 2015-08-13 | Jfe Steel Corporation | Abrasion resistant steel plate having excellent low-temperature toughness and excellent corrosive wear resistance |
| CN103305752A (en) * | 2013-06-20 | 2013-09-18 | 舞阳钢铁有限责任公司 | Large-thickness high-performance SA302GrC steel plate and production method thereof |
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| CN111549292A (en) * | 2020-05-29 | 2020-08-18 | 舞阳钢铁有限责任公司 | Low-cost high-alloy Cr-Mo pipe fitting steel plate and production method thereof |
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