CN104451374A - Excellent 60 or 65 carbon steel wire rod containing residual vanadium and production process of excellent 60 or 65 carbon steel wire rod - Google Patents
Excellent 60 or 65 carbon steel wire rod containing residual vanadium and production process of excellent 60 or 65 carbon steel wire rod Download PDFInfo
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- CN104451374A CN104451374A CN201410709652.2A CN201410709652A CN104451374A CN 104451374 A CN104451374 A CN 104451374A CN 201410709652 A CN201410709652 A CN 201410709652A CN 104451374 A CN104451374 A CN 104451374A
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Abstract
The invention discloses an excellent 60 or 65 carbon steel wire rod containing residual vanadium and a production process of the excellent 60 or 65 carbon steel wire rod. The content of residual vanadium in steel is expanded; the heating system and a control processing process of a heating furnace are optimized; different stelmor control cooling processes are designed according to different residual vanadium contents; the mechanical property and the high-power quality of the produced excellent 60 or 65 carbon steel wire rod of phi6.5mm reach the internal control requirements, and meet the operating requirements of downstream users, and thus the selection range of raw materials for producing the excellent 60 or 65 carbon steel wire rod is expanded; the production cost is reduced; and particularly, the production cost of the smelting procedure is reduced.
Description
Technical field
The present invention relates to carbon steel wire rod production technical field, be specifically related to a kind of containing residual vanadium 60 or 65 highquality carbon steel wire rod and production technique thereof.
Background technology
60,65 highquality carbon steel wire rods are one of main raw materials of Steel Wire Products Industry.By being widely used in processing various steel wire, all kinds of steel strand, wireline etc. after wire drawing, as the bearing steel wire, fiber cores silk etc. of spring for mattress, freeway guardrail, cable core wire, extension optical fiber or cable.60,65 highquality carbon steel wire rods carry out cold drawing in following process process, and require that having good life draws performance, drawing wire broken rate is not more than 5 times/100 tons; Carry out around spring in following process process, twist with the fingers stock, plying, its finished product in use will bear different loads such as repeatedly reversing and bend.Therefore very high to the intensity of steel, torsion, requirement that is bending and fatigue property.
60, the purity of above-mentioned handling characteristics to its steel of 65 highquality carbon steel wire rods proposes high requirement.Due to cost factor, the raw material smelting 60,65 highquality carbon steel wire rods mainly adopts molten iron+steel scrap, and containing v element in some steel scrap, in the iron ore that some areas produce, itself is containing higher v element, if smelt, contained vanadium is extract completely, greatly can increase cost.60,65 highquality carbon steel wire rods of current domestic production are all adopt not containing the ore of vanadium and not containing vanadium steel scrap, and this brings larger limitation with regard to giving the material choice of production 60,65 highquality carbon steel wire rod; Or when smelting, v element remaining in steel is down to less than 0.015%, this adds increased production cost.
Therefore research is containing the production technique of residual vanadium 60,65 highquality carbon steel wire rod, can widen the material choice scope of production 60,65 highquality carbon steel wire rod, reduces smelting cost.To the long term growth of 60,65 highquality carbon steel wire rods, there is direct directive significance.
Summary of the invention
Instant invention overcomes the deficiencies in the prior art, provide a kind of production cost low containing residual vanadium 60 or 65 highquality carbon steel wire rod and production technique thereof.
Consider the problems referred to above of prior art, according to an aspect disclosed by the invention, the present invention by the following technical solutions:
Containing a production technique for residual vanadium 60 or 65 highquality carbon steel wire rod, it comprises the following steps:
Step one, KR desulfurization
By blast-melted pass into hot metal ladle after be transported to KR desulfurization station and carry out desulfurization process, carry out stirring desulphurization process after then adding 6 ~ 14Kg/t ferruginous lime sweetening agent, churning time 8min ~ 10min, to carry out KR desulfurization;
Step 2, converter steelmaking
Pour the molten iron after desulfurization into converter to blow, converter tapping terminal C content requires >=0.10%, P content requirement≤0.010%, tapping temperature 1620-1680 DEG C.Add Ca deoxidier 1.5 ~ 2.5kg/t after tapping, FeSi add-on 0.8 ~ 1.5Kg/t, carbon manganese ball 8 ~ 10kg/t, not enough carbon carburelant is supplied, not enough manganese FeMn supplies;
Step 3, LF external refining
Can tap after ladle chemistry after converter tapping and temperature are adjusted to claimed range, require to forbid during refining feeding aluminum steel; White slag hold-time >=15min, must ensure that white slag is tapped; Synthetic slag add-on >=600kg, to ensure arc-covering slag operation; Refining terminates rear stove and feeds composite calcium line 0.8 ~ 1.4m/t outward, strict controls Argon intensity, with molten steel not exposed seething be as the criterion, the time of only blowing >=10min; After the clean Argon of LF, tapping temperature controls at 1522 ~ 1542 DEG C;
Step 4, protection continuous casting
Employing stopper is poured into a mould, and large bag casting process adopts: Ar protects+add gasket (every stove replacing gasket); Tundish target temperature controls at 1482 ~ 1497 DEG C; Use high carbon steel mould flux; Avoid high pulling rate water steel and stablize Casting speed in casting process, adopt automatic liquid level to control; In the middle of Baogang water temp change when need adjust pulling rate or the front and back time thermometric temperature difference >=8 DEG C, then to resurvey, after checking, adjust pulling rate again;
Step 5, induction stirring
Adopt induction stirring, mixing parametric: frequency 3.5Hz, electric current 350A;
Step 6, three sections of water-cooleds
Adopt specific water (L/Kg) 1.09; To secondary cooling water inspection, continuous casting ensures that two is evenly cold before opening and watering, all can adopt automatic distribution water;
Step 7, process furnace charging roller material loading
Step 8, steel billet are checked
The data detected are that blank end face must not have the defects such as shrinkage cavity, subsurface bubble, crackle, layering; Blank surface obtains visual visible pipe, skull patch, scab, be mingled with, fold, the ears or side handles of a utensil, slag inclusion, crack; Steel billet macro coupon must not have macroscopic white point, layering, bubble, be mingled with and skull patch, the grading of macrostructure defect performs by YB/T 153, and all kinds of macrostructure Level should be not more than 2 grades;
Step 9, process furnace heat
First process furnace charging roller material loading, then steel billet enters stove, walking-beam furnace zone heating, and being heated to temperature is 1020-1060 DEG C, and furnace delivery table steel billet is come out of the stove;
Step 10, high-pressure water descaling
Removing steel scale on surface, ensures the surface quality of steel;
Step 11, the rolling of roughing six frame
Step 12,1# flying shear crop
Step 13, in roll six frame rollings
Head and tail cut by step 14,2# flying shear
Step 15, in roll two frame rollings
Step 10 six, pre-finish rolling four frame rolling
Step 10 seven, 1# and 2# water cooling box cool
Ensure that steel reaches requirement in the temperature of BGV entrance by the cooling of 1#, 2# water tank;
Step 10 eight, 3# flying shear crop
Step 10 nine, Horizontal loose sleeve
Step 2 ten, BGV rolling
Step 2 11,3#, 4# water cooling box cool
Ensure that steel reaches requirement in the temperature of TMB entrance by the cooling of 3#, 4# water tank;
Step 2 12, TMB1 and TMB2 rolling
Step 2 13,5# water cooling box cool
Ensure that the laying temperature of steel reaches requirement by the cooling of 5# water tank;
Step 2 14, Laying head pitch of the laps
Step 2 15, loose coil colling
Control to ensure the cooling rate of steel in each metallographic structure phase transition temperature interval by the cooling on Stanermo wind-cooling linear, thus control the metallographic structure of steel;
And then collection retracting collection, hang volume, the transport of PF hook-type fortune machine, checks on the quality, samples, wipes out end to end, compress bundling.
In order to realize the present invention better, further technical scheme is:
According to one embodiment of the invention, described process furnace heating condition controls in following scope:
, and described furnace atmosphere: week reduction; Air-fuel ratio: 0.70 ~ 0.85.
According to another embodiment of the invention, described roll control is in following scope:
| BGV entrance rolled piece temperature, DEG C | TMB entrance rolled piece temperature, DEG C | Laying temperature, DEG C |
| 830～870 | 820～860 | 850～880 |
。
According to another embodiment of the invention, after the residual content of vanadium steel of described difference rolls on Stanermo wind-cooling linear during loose coil colling, control overflow is as follows:
The air-cooled roller table speed of stelmor:
| Roller-way section | 1 section | 2 sections | 3 sections | 4 sections | 5 sections | 6 sections | 7 sections | 8 sections | 9 sections | 10 sections | 11 sections | 12 sections | 13 sections |
| Speed (m/s) | 0.70 | 0.70 | 0.70 | 0.70 | 0.70 | 0.74 | 0.78 | 0.82 | 0.86 | 0.90 | 0.94 | 0.94 | 0.94 |
Fan delivery:
According to another embodiment of the invention, when described controlling board twists in loose coil colling on Stanermo wind-cooling linear, the cooling rate before pearlitic transformation is 12 ~ 15 DEG C/s; When residual content of vanadium≤0.020%, pearlitic transformation temperature controls at 580 ~ 700 DEG C, and between phase change zone, cooling rate is 2 ~ 3 DEG C/s, and after phase transformation, cooling rate is 3 ~ 5 DEG C/s; When residual content of vanadium is 0.021% ~ 0.040% time, pearlitic transformation temperature controls at 570 ~ 690 DEG C, and between phase change zone, cooling rate is 1.5 ~ 2.5 DEG C/s, and after phase transformation, cooling rate is 2 ~ 4 DEG C/s.
The present invention can also be:
A kind of containing residual vanadium 60 or 65 highquality carbon steel wire rod, it comprises following mass component proportioning:
According to another embodiment of the invention, it is that sorbite, on a small quantity perlite and a small amount of ferrite form by metallographic structure, and wherein 60 sorbitic rates are no less than 75%, and 65 sorbitic rates are no less than 80%.
Compared with prior art, one of beneficial effect of the present invention is:
One of the present invention is containing residual vanadium 60 or 65 highquality carbon steel wire rod and production technique thereof, relax residual content of vanadium in steel, optimize process furnace heating cycle, controlled rolling technique, different stelmor Controlled cooling process is designed according to different residual content of vanadium, mechanical property and the high power quality of manufacturing experimently Φ 6.5mm 60, the 65 highquality carbon steel wire rod produced all reach internal control design requirements, meet downstream user service requirements; Widen the material choice scope of producing 60,65 highquality carbon steel wire rods like this, reduce production cost.
Accompanying drawing explanation
In order to clearer explanation present specification embodiment or technical scheme of the prior art, below the accompanying drawing used required in the description to embodiment or prior art is briefly described, apparently, the accompanying drawing that the following describes is only the reference to some embodiments in present specification, for those skilled in the art, when not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 shows Φ 6.5mm 60 highquality carbon steel wire rod micro test signal picture according to an embodiment of the invention.
Fig. 2 shows Φ 6.5mm 65 highquality carbon steel wire rod micro test signal picture according to an embodiment of the invention.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
When the object of the present embodiment is smelting 60,65 highquality carbon steel wire rod steel billet, v element content remaining in steel is reduced to not higher than 0.040%; Use the equipment advantage of high line unit, by optimizing the process furnace heating cycle before rolling, adopting the air-cooled technology of control, by contain in steel≤0.040% remaining v element fully separates out with the form of vanadium carbide or vanadium nitride, improve metallographic structure, ensure the mechanical property of 60,65 highquality carbon steel wire rods, reach the object reducing production cost.
Main technical schemes:
The present invention 60, technical process produced by 65 highquality carbon steel wire rods: blast-melted → (KR desulfurization) → converter steelmaking → LF external refining → protection continuous casting+induction stirring+liquid automatic control+three sections water-cooled → steel billet inspection → (reconditioning) → process furnace charging roller material loading → steel billet enters stove → walking-beam furnace heating → furnace delivery table steel billet comes out of the stove → high-pressure water descaling → roughing six frame rolling → 1# flying shear crop (accident is cataclasm) → in roll six frame rollings → 2# flying shear crop, tail (accident is cataclasm) → in roll two frame rollings → pre-finish rolling four frame rolling (comprising vertical kink) → 1#, 2# water cooling box cooling → 3# flying shear crop (accident is cataclasm) → Horizontal loose sleeve → BGV rolling → 3#, 4# water cooling box cooling → TMB1+TMB2 rolling → 5# water cooling box cooling → (pinch roll) → Laying head → loose coil colling → collection retracting collection → hang volume → PF hook-type fortune machine to transport → check on the quality, sampling, wipe out end to end → compress bundling → extension label of weighing → unload volume → warehouse-in → finished product to transport.
Particularly, a kind of production technique containing residual vanadium 60 or 65 highquality carbon steel wire rod, it comprises the following steps:
Step one, KR desulfurization
Pass into hot metal ladle by blast-melted, then be transported to KR desulfurization station and carry out desulfurization process, carry out stirring desulphurization process after adding 6 ~ 14Kg/t ferruginous lime sweetening agent, churning time 8min ~ 10min;
Step 2, converter steelmaking
Pour the molten iron after desulfurization into converter to blow, converter tapping terminal C content requires >=0.10%, P content requirement≤0.010%, tapping temperature 1620 ~ 1680 DEG C, Ca deoxidier 1.5 ~ 2.5kg/t is added after tapping, FeSi add-on 0.8 ~ 1.5Kg/t, carbon manganese ball 8 ~ 10kg/t, not enough carbon carburelant is supplied, not enough manganese FeMn supplies;
Step 3, LF external refining
Can tap after ladle chemistry after converter tapping and temperature are adjusted to claimed range, during refining, forbid feeding Al line; White slag hold-time >=15min, tap when white slag; Synthetic slag add-on >=600kg, to ensure arc-covering slag operation; Refining terminates rear stove and feeds composite calcium line 0.8 ~ 1.4m/t outward, strict controls Argon intensity, with molten steel not exposed seething be as the criterion, the time of only blowing >=10min; After the clean Argon of LF, tapping temperature controls at 1522 ~ 1542 DEG C;
Step 4, protection continuous casting
Employing stopper is poured into a mould, and large bag casting process adopts: Ar protects and adds gasket; Tundish target temperature controls at 1482 ~ 1497 DEG C; Use high carbon steel mould flux; Avoid high pulling rate water steel and stablize Casting speed in casting process, automatic liquid level can be adopted to control; In the middle of Baogang water temp change when need adjust pulling rate or the front and back time thermometric temperature difference >=8 DEG C, then to resurvey, after checking, adjust pulling rate again;
Step 5, induction stirring
Adopt induction stirring, mixing parametric: frequency 3.5Hz; Electric current 350A;
Step 6, three sections of water-cooleds
Its specific water (L/Kg) is 1.09; It is evenly cold that continuous casting carries out inspection guarantee two to secondary cooling water before opening and watering;
Step 7, process furnace charging roller material loading
Step 8, steel billet are checked
The data of concrete detection are that blank end face must not have the defects such as shrinkage cavity, subsurface bubble, crackle, layering; Blank surface obtains visual visible pipe, skull patch, scab, be mingled with, fold, the ears or side handles of a utensil, slag inclusion, crack; Steel billet macro coupon must not have macroscopic white point, layering, bubble, be mingled with and skull patch, the grading of macrostructure defect performs by YB/T 153, and all kinds of macrostructure Level should be not more than 2 grades;
Step 9, process furnace heat
First process furnace charging roller material loading, then steel billet enters stove, walking-beam furnace zone heating, and being heated to temperature is 1020-1060 DEG C, and furnace delivery table steel billet is come out of the stove;
Step 10, high-pressure water descaling
Removing steel scale on surface, ensures the surface quality of steel;
Step 11, the rolling of roughing six frame
Step 12,1# flying shear crop
Step 13, in roll six frame rollings
Head and tail cut by step 14,2# flying shear
Step 15, in roll two frame rollings
Step 10 six, pre-finish rolling four frame rolling
Step 10 seven, 1# and 2# water cooling box cool
Ensure that steel reaches requirement in the temperature of BGV entrance by the cooling of 1#, 2# water tank;
Step 10 eight, 3# flying shear crop
Step 10 nine, Horizontal loose sleeve
Step 2 ten, BGV rolling
Step 2 11,3#, 4# water cooling box cool
Ensure that steel reaches requirement in the temperature of TMB entrance by the cooling of 3#, 4# water tank;
Step 2 12, TMB1 and TMB2 rolling
Step 2 13,5# water cooling box cool
Ensure that the laying temperature of steel reaches requirement by the cooling of 5# water tank;
Step 2 14, Laying head pitch of the laps
Step 2 15, loose coil colling
Control to ensure the cooling rate of steel in each metallographic structure phase transition temperature interval by the cooling on Stanermo wind-cooling linear, thus control the metallographic structure of steel;
And then collection retracting collection, hang volume, the transport of PF hook-type fortune machine, checks on the quality, samples, wipes out end to end, compress bundling.
Innovation key point of the present invention is as follows:
(1) in steel, remaining v element controls
Domesticly generally the remaining v element content of 60,65 highquality carbon steels is controlled below 0.015%; And the remaining v element content of 60,65 highquality carbon steels of the present invention controls below 0.040%, as being 0.016% ~ 0.040%, thus reduce smelting cost.
The chemical composition design of table 1 steel
(2) process furnace heating condition optimal control:
The each heating zone heating cycle of table 2
Furnace atmosphere: week reduction.
Air-fuel ratio: 0.70 ~ 0.85
Suitably heighten soaking zone temperature, make remaining v element in steel to be fully dissolved in steel.
(3) controlled rolling key point:
Table 3 critical process rolled piece temperature
| BGV entrance rolled piece temperature, DEG C | TMB entrance rolled piece temperature, DEG C | Laying temperature, DEG C |
| 830～870 | 820～860 | 850～880 |
Rolling temperature is controlled the lower temperature region in the above temperature of recrystallize, make steel in lower temperature range, avoid the grain fineness number of steel thick and affect its mechanical property.
(4) loose coil colling strategic point on rear Stanermo wind-cooling linear is rolled:
The air-cooled roller table speed of table 4 stelmor
| Roller-way section | 1 section | 2 sections | 3 sections | 4 sections | 5 sections | 6 sections | 7 sections | 8 sections | 9 sections | 10 sections | 11 sections | 12 sections | 13 sections |
| Speed (m/s) | 0.70 | 0.70 | 0.70 | 0.70 | 0.70 | 0.74 | 0.78 | 0.82 | 0.86 | 0.90 | 0.94 | 0.94 | 0.94 |
Table 5 fan delivery
According to the number of content of vanadium remaining in steel, design different air-cooled technique respectively.It is 12 ~ 15 DEG C/s that controlling board twists in the cooling rate before pearlitic transformation; When residual content of vanadium≤0.020%, pearlitic transformation temperature controls at 580 ~ 700 DEG C, and between phase change zone, cooling rate is 2 ~ 3 DEG C/s, and after phase transformation, cooling rate is 3 ~ 5 DEG C/s; When residual content of vanadium is 0.021% ~ 0.040% time, pearlitic transformation temperature controls at 570 ~ 690 DEG C, between phase change zone, cooling rate is 1.5 ~ 2.5 DEG C/s, after phase transformation, cooling rate is 2 ~ 4 DEG C/s, pearlitic transformation will be postponed, so need to reduce phase change zone cooling rate, proper extension transformation time because content of vanadium is more, make phase transformation complete, avoid wire rod to produce abnormal metallographic structure.
The specific targets reached:
Table 6 mechanical performance index
| Grade of steel | Operative norm | Sample state | R 0 m，MPa | Elongation A, % | Relative reduction in area Z, % |
| 60 | GB/T24242.2-2009 | Hot rolling | ≥850 | ≥13.5 | ≥32 |
| 65 | GB/T24242.2-2009 | Hot rolling | ≥900 | ≥13.0 | ≥30 |
Metallographic structure is sorbite+a small amount of perlite+a small amount of ferrite, and wherein 60 sorbitic rates are no less than 75%, and 65 sorbitic rates are no less than 80%; The tissue not allowing quenching structure (martensite and troostite region) and reticulattion etc. to have impact to use exists.
Another embodiment, in May, 2014 and in June, 2014 produce 60, the 65 highquality carbon steel wire rods having manufactured experimently Φ 6.5mm.Production technique strictly controls by the drip irrigation device of above-mentioned formulation, and finished product is as follows through inspection indices:
Table 7 Φ 6.5mm 60,65 highquality carbon steel wire rod chemical composition
Table 8 Φ 6.5mm 60,65 highquality carbon steel wire rod mechanical property
As shown in Table 8,60, the 65 highquality carbon steel wire rods of the Φ 6.5mm of trial-production, the mechanical property of 5 stoves all reaches internally controlling requirement value, and each entry value is generally higher than interior control value, good mechanical performance.Thus containing residual vanadium 60,65 highquality carbon steel wire rod, can be the material choice of smelting such steel and widen scope, reduce production cost.
Table 9 Φ 6.5mm 60,65 highquality carbon steel wire rod micro test result
Found out by table 9 and Fig. 1, Fig. 2: the high power quality that 60, the 65 highquality carbon steel wire rods of Φ 6.5mm produced by high line also reaches internally controlling requirement, meets user's service requirements.
In sum, of the present invention containing residual vanadium 60,65 highquality carbon steel wire rod, relax residual content of vanadium in steel, optimize process furnace heating cycle, controlled rolling technique, different stelmor Controlled cooling process is designed according to different residual content of vanadium, mechanical property and the high power quality of manufacturing experimently Φ 6.5mm 60, the 65 highquality carbon steel wire rod produced all reach internally controlling requirement, meet downstream user service requirements.Widen the material choice scope of producing 60,65 highquality carbon steel wire rods like this, reduced production cost, particularly reduce smelting procedure production cost.
In the present invention: 1. by content of vanadium residual in steel by domestic common design≤0.015%, relax to≤0.040%, widen material choice scope, reduce smelting procedure cost; 2. optimize heating cycle, suitably improve soaking zone temperature, residual vanadium is fully dissolved in steel; 3. controlled rolling, controlled cooling technique is adopted, according to the residual content of vanadium of difference, design the different air-cooled parameters of stelmor, to adapt to different residual content of vanadium to the retardation function of pearlitic transformation, the mechanical property of Φ 6.5mm 60,65 highquality carbon steel wire rod and high power quality is made to meet downstream user service requirements.
In this specification sheets, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiment, identical similar portion cross-reference between each embodiment.
Spoken of in this manual " embodiment ", " another embodiment ", " embodiment ", etc., refer to the specific features, structure or the feature that describe in conjunction with this embodiment and be included at least one embodiment of the application's generality description.Multiple place occurs that statement of the same race is not necessarily refer to same embodiment in the description.Furthermore, when describing specific features, structure or a feature in conjunction with any embodiment, what advocate is also fall within the scope of the invention to realize this feature, structure or feature in conjunction with other embodiments.
Although with reference to multiple explanatory embodiment of the present invention, invention has been described here, but, should be appreciated that, those skilled in the art can design a lot of other amendment and embodiment, these amendments and embodiment will drop within spirit disclosed in the present application and spirit.More particularly, in the scope of and claim open in the application, multiple modification and improvement can be carried out to the building block of subject combination layout and/or layout.Except the modification of carrying out building block and/or layout is with except improvement, to those skilled in the art, other purposes also will be obvious.
Claims (8)
1., containing a production technique for residual vanadium 60 or 65 highquality carbon steel wire rod, it is characterized in that it comprises the following steps:
Step one, KR desulfurization
Pass into hot metal ladle by blast-melted, then be transported to KR desulfurization station and carry out desulfurization process, add 6 ~ 14Kg/t ferruginous lime sweetening agent to carry out stirring desulphurization process, churning time 8min ~ 10min;
Step 2, converter steelmaking
Pour the molten iron after desulfurization into converter to blow, converter tapping terminal C content >=0.10%, P content≤0.010%, tapping temperature 1620 ~ 1680 DEG C, Ca deoxidier 1.5 ~ 2.5kg/t is added after tapping, FeSi add-on 0.8 ~ 1.5Kg/t, carbon manganese ball 8 ~ 10kg/t, not enough carbon carburelant is supplied, not enough manganese FeMn supplies;
Step 3, LF external refining
Feeding Al line is forbidden during refining; White slag hold-time >=15min, tap when white slag; Synthetic slag add-on >=600kg, to ensure arc-covering slag operation; Refining terminates rear stove and feeds composite calcium line 0.8 ~ 1.4m/t outward, control Argon intensity, with molten steel not exposed seething be as the criterion, the time of only blowing >=10min; After the clean Argon of LF, tapping temperature controls at 1522 ~ 1542 DEG C;
Step 4, protection continuous casting
Employing stopper is poured into a mould, and large bag casting process adopts Ar protection and adds gasket; Tundish target temperature controls at 1482 ~ 1497 DEG C; Use high carbon steel mould flux; Avoid high pulling rate water steel and stablize Casting speed in casting process, adopt automatic liquid level to control; In the middle of Baogang water temp change when need adjust pulling rate or the front and back time thermometric temperature difference >=8 DEG C, then to resurvey, after checking, adjust pulling rate again;
Step 5, induction stirring
Adopt induction stirring, mixing parametric: frequency 3.5Hz, electric current 350A;
Step 6, three sections of water-cooleds
Its specific water (L/Kg) is 1.09; It is evenly cold that continuous casting carries out inspection guarantee two to secondary cooling water before opening and watering;
Step 7, process furnace charging roller material loading
Step 8, steel billet are checked
The data detected are that blank end face must not have the defects such as shrinkage cavity, subsurface bubble, crackle, layering; Blank surface obtains visual visible pipe, skull patch, scab, be mingled with, fold, the ears or side handles of a utensil, slag inclusion, crack; Steel billet macro coupon must not have macroscopic white point, layering, bubble, be mingled with and skull patch, the grading of macrostructure defect performs by YB/T 153, and all kinds of macrostructure Level should be not more than 2 grades;
Step 9, process furnace heat
First process furnace charging roller material loading, then steel billet enters stove, walking-beam furnace zone heating, and being heated to temperature is 1020-1060 DEG C, and furnace delivery table steel billet is come out of the stove;
Step 10, high-pressure water descaling
Removing steel scale on surface, ensures the surface quality of steel;
Step 11, the rolling of roughing six frame
Step 12,1# flying shear crop
Step 13, in roll six frame rollings
Head and tail cut by step 14,2# flying shear
Step 15, in roll two frame rollings
Step 10 six, pre-finish rolling four frame rolling
Step 10 seven, 1# and 2# water cooling box cool
Ensure that steel reaches requirement in the temperature of BGV entrance by the cooling of 1#, 2# water tank;
Step 10 eight, 3# flying shear crop
Step 10 nine, Horizontal loose sleeve
Step 2 ten, BGV rolling
Step 2 11,3#, 4# water cooling box cool
Ensure that steel reaches requirement in the temperature of TMB entrance by the cooling of 3#, 4# water tank;
Step 2 12, TMB1 and TMB2 rolling
Step 2 13,5# water cooling box cool
Ensure that the laying temperature of steel reaches requirement by the cooling of 5# water tank;
Step 2 14, Laying head pitch of the laps
Step 2 15, loose coil colling
Control to ensure the cooling rate of steel in each metallographic structure phase transition temperature interval by the cooling on Stanermo wind-cooling linear, thus control the metallographic structure of steel;
And then collection retracting collection, hang volume, the transport of PF hook-type fortune machine, checks on the quality, samples, wipes out end to end, compress bundling.
2. the production technique containing residual vanadium 60 or 65 highquality carbon steel wire rod according to claim 1, is characterized in that described process furnace heating condition controls in following scope:
, and described furnace atmosphere: week reduction; Air-fuel ratio: 0.70 ~ 0.85.
3. the production technique containing residual vanadium 60 or 65 highquality carbon steel wire rod according to claim 1, is characterized in that described roll control is in following scope:
。
4. the production technique containing residual vanadium 60 or 65 highquality carbon steel wire rod according to claim 1, it is characterized in that the residual content of vanadium steel of described difference after rolling on Stanermo wind-cooling linear during loose coil colling, control overflow is as follows:
The air-cooled roller table speed of stelmor:
Fan delivery:
5. the production technique containing residual vanadium 60 or 65 highquality carbon steel wire rod according to claim 1, when it is characterized in that described controlling board twists in loose coil colling on Stanermo wind-cooling linear, the cooling rate before pearlitic transformation is 12 ~ 15 DEG C/s; When residual content of vanadium≤0.020%, pearlitic transformation temperature controls at 580 ~ 700 DEG C, and between phase change zone, cooling rate is 2 ~ 3 DEG C/s, and after phase transformation, cooling rate is 3 ~ 5 DEG C/s; When residual content of vanadium is 0.021% ~ 0.040% time, pearlitic transformation temperature controls at 570 ~ 690 DEG C, and between phase change zone, cooling rate is 1.5 ~ 2.5 DEG C/s, and after phase transformation, cooling rate is 2 ~ 4 DEG C/s.
6., containing a residual vanadium 60 or 65 highquality carbon steel wire rod, it is characterized in that the remaining v element content of 60,65 highquality carbon steels controls below 0.040%.
7. according to claim 6 containing residual vanadium 60 or 65 highquality carbon steel wire rod, it is characterized in that it comprises following mass component proportioning:
8. according to claim 6 containing residual vanadium 60 or 65 highquality carbon steel wire rod, it is characterized in that by metallographic structure being that sorbite, on a small quantity perlite and a small amount of ferrite form, wherein 60 sorbitic rates are no less than 75%, and 65 sorbitic rates are no less than 80%.
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| CN201410709652.2A CN104451374B (en) | 2014-11-27 | 2014-11-27 | Containing residual vanadium 60 or 65 Fine Steel Casting iron wire rod and production technology thereof |
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| CN201410709652.2A CN104451374B (en) | 2014-11-27 | 2014-11-27 | Containing residual vanadium 60 or 65 Fine Steel Casting iron wire rod and production technology thereof |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105665442A (en) * | 2016-01-14 | 2016-06-15 | 中冶赛迪工程技术股份有限公司 | Coil production method and production line thereof |
| CN107058669A (en) * | 2017-02-17 | 2017-08-18 | 江苏佳杰特种螺钉有限公司 | A kind of production technology for the fastener applied on automobile |
| CN110029276A (en) * | 2019-05-23 | 2019-07-19 | 攀钢集团攀枝花钢铁研究院有限公司 | High silicon welding steel of high-carbon and preparation method thereof |
| CN110144431A (en) * | 2019-04-04 | 2019-08-20 | 山东泰山钢铁集团有限公司 | A kind of calcium treating method for the refining of LF furnace |
| CN110777244A (en) * | 2019-11-28 | 2020-02-11 | 广东韶钢松山股份有限公司 | Medium-carbon high-sulfur free-cutting steel and preparation process thereof |
| CN111549211A (en) * | 2020-05-13 | 2020-08-18 | 邢台钢铁有限责任公司 | Rolling method of micro-boron high-carbon steel wire rod |
| CN114082780A (en) * | 2021-11-20 | 2022-02-25 | 酒泉钢铁(集团)有限责任公司 | Production process for reducing residual stress of large-size high-carbon steel wire |
| CN114908282A (en) * | 2022-05-31 | 2022-08-16 | 本钢板材股份有限公司 | Production process for controlling oxygen and nitrogen content of SWRH42B carbon steel hot-rolled wire rod |
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| CN105665442A (en) * | 2016-01-14 | 2016-06-15 | 中冶赛迪工程技术股份有限公司 | Coil production method and production line thereof |
| CN107058669A (en) * | 2017-02-17 | 2017-08-18 | 江苏佳杰特种螺钉有限公司 | A kind of production technology for the fastener applied on automobile |
| CN110144431A (en) * | 2019-04-04 | 2019-08-20 | 山东泰山钢铁集团有限公司 | A kind of calcium treating method for the refining of LF furnace |
| CN110029276A (en) * | 2019-05-23 | 2019-07-19 | 攀钢集团攀枝花钢铁研究院有限公司 | High silicon welding steel of high-carbon and preparation method thereof |
| CN110029276B (en) * | 2019-05-23 | 2020-07-07 | 攀钢集团攀枝花钢铁研究院有限公司 | High-carbon high-silicon welding steel and preparation method thereof |
| CN110777244A (en) * | 2019-11-28 | 2020-02-11 | 广东韶钢松山股份有限公司 | Medium-carbon high-sulfur free-cutting steel and preparation process thereof |
| CN110777244B (en) * | 2019-11-28 | 2021-04-02 | 广东韶钢松山股份有限公司 | Medium-carbon high-sulfur free-cutting steel and preparation process thereof |
| CN111549211A (en) * | 2020-05-13 | 2020-08-18 | 邢台钢铁有限责任公司 | Rolling method of micro-boron high-carbon steel wire rod |
| CN114082780A (en) * | 2021-11-20 | 2022-02-25 | 酒泉钢铁(集团)有限责任公司 | Production process for reducing residual stress of large-size high-carbon steel wire |
| CN114082780B (en) * | 2021-11-20 | 2024-03-08 | 酒泉钢铁(集团)有限责任公司 | Production process for reducing residual stress of large-sized high-carbon steel wire rod |
| CN114908282A (en) * | 2022-05-31 | 2022-08-16 | 本钢板材股份有限公司 | Production process for controlling oxygen and nitrogen content of SWRH42B carbon steel hot-rolled wire rod |
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