CN102912101A - Production process of 65 Mn spring steel wire rod and 65 Mn spring steel wire rod - Google Patents
Production process of 65 Mn spring steel wire rod and 65 Mn spring steel wire rod Download PDFInfo
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Abstract
The invention discloses a production process of a 65 Mn spring steel wire rod and a 65 Mn spring steel wire rod. According to the invention, advantages of a device of a high line set are utilized, a finish rolling and reducing-sizing mills adopt 8+4 type, through optimization of a heating cycle process before rolling, a rolling control process and a cooling control process, only 8 front finish rolling machines and 2 reducing-sizing mills are utilized, so that surface decarburization of a spring is reduced and is even removed, and the fatigue life of a finished spring is prolonged; the amount of scales is reduced and the metal yield is improved; a metallographic structure is improved and a high sorbite rate is obtained, so that the production process has conditions to cancel a lead patenting process at the earlier drawing stage, the production processing cost is reduced, and the metallographic structure and the comprehensive performance of a hot-rolled wire rod for the 65 Mn spring steel are optimized. According to the invention, the microstructure quality and the mechanical property of the produced hot-rolled wire rod with phi6.5 mm for the 65 Mn spring steel reach the standard of the conventional 65 Mn spring steel after lead hot-rolled wire rod for the 65 Mn spring steel, the conditions to cancel the lead patenting process at the earlier drawing stage by a downstream user can be satisfied, a processing process is reduced for a user, and the production cost is reduced.
Description
Technical field
The invention belongs to field of metallurgy, relate to a kind of production technique of wire rod, more particularly, relate to a kind of production technique of 65Mn spring steel wire rod and the 65Mn spring steel wire rod that obtains according to this production technique.
Background technology
Spring steel wire rod has the characteristics of high-carbon and low alloy steel concurrently, be used to the important source material of making common spring wire, oil-tempered spring wire, automobile and the metal productss such as agricultural vehicle damper spring, other mechanical spring, the high product of a kind of added value, the huge market demand.And the 65Mn steel is one of topmost spring steel in the market, also is one of spring steel of the present large usage quantity in southwest.
The spring Main Function is the storage elasticity strain energy and alleviates shock and impact.Because spring generally uses under the condition of dynamic load (alternating bending stress or reversed torsion stress), therefore require spring steel that high elastic limit σ e, high yield strength σ s, tensile strength sigma b, high yield tensile ratio σ s/ σ b and high anti-fatigue performance must be arranged, and enough plasticity and toughness arranged, preferably hardening capacity and low Decarburization Sensitivity are so that be easy to obtain required performance after moulding and the thermal treatment under cold-hot condition.The 65Mn steel has through hardening better performances, intensity than advantages of higher, for the manufacture of spring, is widely used.Therefore, spring steel wire rod requires just to have to have high tensile strength and fatigue lifetime.
The 65Mn spring steel wire rod also will carry out the techniques such as surperficial de-scaling, cold-drawn, thermal treatment in the following process process, so its surface quality is had higher requirements.The 65Mn spring steel wire rod requires to have high cleanliness factor and homogeneity of ingredients, and the strict control surface decarburization of palpus requires uniform Microstructure and properties, otherwise can cause that the poker characteristic of wire rod is inhomogeneous, causes wire broken rate higher, affects the subsequent machining technology performance of product.
Traditional 65Mn spring steel wire rod adopts pair rolling, and the finished surface decarburization is serious, ferric oxide skin depth, recovery rate of iron are lower, and metallographic structure is the larger perlite of sheet interlayer spacing, and production cost is higher.Thus obtained spring steel wire rod needs to carry out patenting in drawing process could obtain the sorbite tissue, thereby obtain preferably comprehensive mechanical property, be tensile strength Rm 〉=1050MPa, relative reduction in area Z 〉=36%, the 65Mn spring steel wire rod that possesses this metallographic structure and mechanical property, the fatigue lifetime that is difficult for fracture of wire and spring when spring winding is long, and the spring comprehensive mechanical property is good.
Because loading characteristic and the work characteristics of spring, spring steel surface decarburization meeting obviously reduces the safe range of stress of spring.Except rolling rear process for cooling, heating condition also is the important factor that affects the spring steel wire rod surface decarburization.Therefore, need a kind of new production technique of research, reach the metallographic structure of optimization 65Mn spring steel wire rod and the purpose of over-all properties.
Summary of the invention
For the deficiencies in the prior art, one of purpose of the present invention is to solve the one or more problems that exist in the above-mentioned prior art.
The object of the present invention is to provide a kind of fatigue lifetime that can reduce even eliminate the wire rod surface decarburization, improve the finished product spring, reduce the iron scale amount and improve recovery rate of iron, improve metallographic structure improves spring steel wire rod to obtain high sorbite rate intensity and plasticity and make its condition that possesses cancellation drawing patenting in early stage operation, thereby reduce the production technique of 65Mn spring steel wire rod of process for processing cost and the 65Mn spring steel wire rod that obtains according to this production technique.
To achieve these goals, an aspect of of the present present invention provides a kind of production technique of 65Mn spring steel wire rod, described production technique comprises following operation: raw material is prepared, smelting molten steel, continuous casting becomes base, add hot continuously cast material, high temperature rolling becomes wire rod, roll rear control cooling after weaving silk, aftertreatment also obtains the wire rod finished product, wherein, by weight percentage, described wire rod finished product comprises following chemical composition: C:0.63～0.68%, Si:0.15～0.30%, Mn:0.95～1.15%, P≤0.018%, S≤0.016%, Cr≤0.15%, Ni≤0.15%, Cu≤0.10%, Mo≤0.02%, Ti≤0.01%, the Fe of Als≤0.015% and surplus and inevitable impurity; In the described step that adds hot continuously cast material, control preheating section temperature is that 780～820 ℃, warm up time are 35～50 minutes, the heating zone temperature is that 960～1000 ℃, heat-up time are 35～50 minutes, the soaking zone temperature is that 1010～1050 ℃, soaking time are 30～40min, and the control furnace atmosphere is weak reducing atmosphere; Become in the step of wire rod at described high temperature rolling, the control start rolling temperature is 960～1000 ℃, and finishing train and reducing sizing mill group adopt the 8+4 type to be rolled, and only uses front 8 finishing train and 2 reducing sizing mill groups; In the step that control is cooled off after rolling after described weaving silk, the control laying temperature is 870～890 ℃, and adopt stelmor control cold line to carry out the rear control cooling of rolling of wire rod, control stelmor roller-way speed is respectively, the cooling rate that controlling board twists in before the pearlitic transformation is 13～15 ℃/s, the pearlitic transformation temperature is controlled at 660～710 ℃, and cooling rate is 4～5 ℃/s after the phase transformation, makes the wire rod surface temperature that cooling is rear, aftertreatment is front be less than or equal to 300 ℃.
According to an embodiment of the production technique of 65Mn spring steel wire rod of the present invention, in the described step that adds hot continuously cast material, the middle point for measuring temperature temperature of controlling described preheating section is 790～810 ℃.
An embodiment according to the production technique of 65Mn spring steel wire rod of the present invention, described high temperature rolling becomes the step of wire rod to comprise to make continuously cast bloom to form successively the step of wire rod by roughing unit, intermediate mill, finishing train and reducing sizing mill group, wherein, the temperature that the control wire rod enters the finishing train entrance is 860～880 ℃, and the temperature that the control wire rod enters reducing sizing mill group entrance is 860～880 ℃.
According to an embodiment of the production technique of 65Mn spring steel wire rod of the present invention, the nominal diameter of described wire rod finished product is 6.5mm.
According to an embodiment of the production technique of 65Mn spring steel wire rod of the present invention, one side total decarburized layer degree of depth of described wire rod finished product is not more than 1.5% of wire rod finished product nominal diameter.
According to an embodiment of the production technique of 65Mn spring steel wire rod of the present invention, the actual measurement yield strength R of described wire rod finished product
0 EL〉=795MPa, actual measurement tensile strength R
0 m〉=990MPa, elongation A 〉=12.5%, relative reduction in area Z 〉=32%.
Another aspect of the present invention provides a kind of 65Mn spring steel wire rod, and described wire rod is made according to the production technique of above-mentioned 65Mn spring steel wire rod.
The present invention compared with prior art, used the equipment advantage of high line unit, high temperature rolling becomes wire rod to adopt the finish rolling reducing sizing mill group of 8+4 type, and only use front 8 finishing mills and 2 sizing units, not only guarantee production stability but also reduced production energy consumption, also solved the problem that same type machine production line tube reducing unit in the reducing sizing mill group equipment failure occurs or do not have to stop production with regard to palpus in the spare part situation in the industry.By optimizing heating cycle, controlled rolling, the Controlled cooling process before rolling, reduce even eliminated the wire rod surface decarburization, improved the fatigue lifetime of finished product spring; Reduce the iron scale amount, improved recovery rate of iron; Improving metallographic structure makes it possess the condition of cancellation drawing patenting in early stage operation with intensity and the plasticity that obtains high sorbite rate raising spring steel wire rod, reduced the process for processing cost, reached and optimize 65Mn the spring steel metallographic structure of gren rod and the purpose of over-all properties.
Description of drawings
Figure 1A and Figure 1B are the micro test metallographic structure schematic diagram of the sample one of 65Mn spring steel wire rod in the embodiment of the invention.
Fig. 2 A and Fig. 2 B are the micro test metallographic structure schematic diagram of the sample two of 65Mn spring steel wire rod in the embodiment of the invention.
Fig. 3 A and Fig. 3 B are the micro test metallographic structure schematic diagram of the sample three of 65Mn spring steel wire rod in the embodiment of the invention.
Embodiment
Hereinafter, describe production technique and the 65Mn spring steel wire rod of 65Mn spring steel wire rod of the present invention in detail in connection with exemplary embodiment.
Exemplary embodiment according to the production technique of 65Mn spring steel wire rod of the present invention, described production technique comprises following operation: raw material is prepared, smelting molten steel, continuous casting becomes base, add hot continuously cast material, high temperature rolling becomes wire rod, roll rear control cooling after weaving silk, aftertreatment also obtains the wire rod finished product, wherein, by weight percentage, described wire rod finished product comprises following chemical composition C:0.63～0.68%, Si:0.15～0.30%, Mn:0.95～1.15%, P≤0.018%, S≤0.016%, Cr≤0.15%, Ni≤0.15%, Cu≤0.10%, Mo≤0.02%, Ti≤0.01%, the Fe of Al s≤0.015% and surplus and inevitable impurity; In the described step that adds hot continuously cast material, control preheating section temperature is that 780～820 ℃, warm up time are 35～50 minutes, the heating zone temperature is that 960～1000 ℃, heat-up time are 35～50 minutes, the soaking zone temperature is that 1010～1050 ℃, soaking time are 30～40min, and the control furnace atmosphere is weak reducing atmosphere; Become in the step of wire rod at described high temperature rolling, the control start rolling temperature is 960～1000 ℃, and finishing train and reducing sizing mill group adopt the 8+4 type to be rolled, and only uses front 8 finishing train and 2 reducing sizing mill groups; In the step that control is cooled off after rolling after described weaving silk, the control laying temperature is 870～890 ℃, and adopt stelmor control cold line to carry out the rear control cooling of rolling of wire rod, the cooling rate that controlling board twists in before the pearlitic transformation is 13～15 ℃/s, the pearlitic transformation temperature is controlled at 660～710 ℃, cooling rate is 4～5 ℃/s after the phase transformation, makes the wire rod surface temperature that cooling is rear, aftertreatment is front be less than or equal to 300 ℃.
In the present embodiment, the present invention mainly add hot continuously cast material, rolling, concrete technology is improved in the step such as cooling after rolling, effectively optimized tissue and the performance of 65Mn spring steel wire rod, simplified processing sequence and lowered production cost.
According to the present invention, in adding the step of hot continuously cast material, control preheating section temperature is that 780～820 ℃, warm up time are 35～50 minutes, and the heating zone temperature is that 960～1000 ℃, heat-up time are 35～50 minutes, and the soaking zone temperature is that 1010～1050 ℃, soaking time are 30～40min.And the control furnace atmosphere is weak reducing atmosphere, finally makes the top and bottom temperature difference, the total length temperature difference of continuously cast bloom all be no more than 30 ℃.Preferably, the middle point for measuring temperature of preheating section is the zone of the close heating zone of preheating section, and this regional temperature can be subjected to the heating zone temperature radiation and increase, and in order to guarantee the preheating section time, the middle point for measuring temperature temperature that must control preheating section is 790～810 ℃.Temperature and the heat-up time of control heating zone and soaking zone can effectively guarantee start rolling temperature, if the Heating temperature in these two sections zones is crossed low or heat-up time is too short, can't guarantee start rolling temperature or make the non-uniform temperature of continuously cast bloom; If the temperature height or grown heat-up time, scaling loss and the surface decarburization that increases blank affected billet quality, and causes its intensity of thick reduction and the plasticity and toughness of original austenite grains.And to guarantee the temperature and time of heating zone and soaking zone, need appropriate design preheating section temperature and heat-up time, if the preheating section temperature is low or heat-up time short will make ensuing heating zone temperature not or the steel billet internal and external temperature uneven, if preheating section temperature height will increase the blank internal stress and increase the probability that crack defect produces, if preheating section has been grown reduction steel rolling rhythm and affected production efficiency heat-up time.Surface decarburization is the normal defective that occurs of high carbon steel, and in order to reduce decarburization, data analysis draws and adopts weak reducing atmosphere can effectively control decarburization in many group heating-furnaces, and concrete Control of gas content is as shown in table 1 in the process furnace.
Concrete gas content in table 1 process furnace
Because walking beam furnace is steel billet head end and tail end switch type " flame ", so there is the temperature difference in steel billet.In order to improve the poker characteristic homogeneity of finished product, must guarantee that the continuously cast bloom top and bottom temperature difference, the total length temperature difference are no more than 30 ℃.
Studies show that according to relevant: in adding the process of hot continuously cast material, the continuously cast bloom contingent reaction in surface in the process furnace has:
Fe
3C+2O
2＝3FeO+CO (1)，
Fe
3C+H
2O＝3Fe+CO+H
2(2)，
Fe
3C+CO
2＝3Fe+2CO (3)，
2Fe
3C+O
2＝6Fe+2CO (4)，
Fe
3C+2H
2＝3Fe+CH
4(5)，
Above-mentioned reaction process is to have the furnace gas of decarburization capacity and the Fe in the steel
3The interactional result of C, wherein the decarburization capacity of water vapour is the strongest, secondly is CO
2, O
2And H
2By formula (1), (4) reduce the content of oxygen in the stove as can be known, can slow down the steel surface decarburization; And the dividing potential drop of CO is higher in the stove, and the difference of carbon content is also little in atmosphere carbon potential and the steel, and the wire rod practical decarburized depth is also thinner.Therefore, should strictly control the water-content in the burning coal gas in the process furnace in the production, the massfraction of control oxygen, the content of increase CO.
According to the present invention, become in the step of wire rod at high temperature rolling, in order not only to control the original grain degree but also reduce the reasonable controlled rolling temperature of roll wear need, therefore start rolling temperature is controlled at 960～1000 ℃, can cause the original austenite grains degree thick if start rolling temperature is higher than this scope, can increase the weight of roll wear increase production cost if start rolling temperature is lower than this scope.
According to the present invention, high temperature rolling becomes the step of wire rod to comprise to make continuously cast bloom to form successively the step of wire rod by roughing unit, intermediate mill, finishing train and reducing sizing mill group.Particularly in order to obtain small grains, the temperature that requires the control wire rod to enter the finishing train entrance is 860～880 ℃, and the temperature that the control wire rod enters reducing sizing mill group entrance is 860～880 ℃.If wire rod is higher than the claimed range value in the temperature of finishing train, reducing sizing mill group entrance, will make the coarse grains of steel affect its mechanical property; And if be lower than the claimed range value, will increase the weight of roll wear, increase production cost; In addition, wire rod will guarantee that in too high or too low for temperature all will being difficult to of reducing sizing mill group entrance laying temperature is in claimed range.
According to the present invention, become in the step of wire rod at high temperature rolling, finishing train and reducing sizing mill group adopt the 8+4 type, and only use front 8 finishing mills and 2 sizing units.So not only guarantee production stability but also reduced production energy consumption, also solved the problem that same type machine production line tube reducing unit in the reducing sizing mill group equipment failure occurs or do not have to stop production with regard to palpus in the spare part situation in the industry.
According to the present invention, in the step that control is cooled off after rolling after weaving silk, the control laying temperature is 870～890 ℃, and adopt stelmor control cold line to carry out the rear control cooling of rolling of wire rod, the cooling rate that controlling board twists in before the pearlitic transformation is 13～15 ℃/s, the pearlitic transformation temperature is controlled at 660～710 ℃, and cooling rate is 4～5 ℃/s after the phase transformation, makes the wire rod surface temperature that cooling is rear, aftertreatment is front be less than or equal to 300 ℃.The purpose of rolling rear control cooling is the phase transition process of control rolled piece behind high temperature rolling, thus control steel structural state, and then comprehensive mechanical property and the use properties of improvement wire rod.Laying temperature is crossed low meeting and is reduced stabilization of austenite, easily separates out the pro-eutectoid phase, is ferritic 65Mn hypoeutectoid steel mutually for pro-eutectoid, and this will reduce its intensity effect wire rod use properties; The too high one side of laying temperature can make the coarse grains of steel reduce its mechanical property, and also can increase on the other hand the wire rod surface decarburization affects follow-up use.If the cooling rate before the pearlitic transformation is on the low side, can not Quick winding cross pro-eutectoid and form mutually the district, will generate the proeutectoid ferrite that reduces wire rod intensity; If the cooling rate before the pearlitic transformation is too fast, can be difficult to control follow-up transformation temperature and causes abnormal structures such as generating the troostite that affects the wire rod following process even martensite, bainite.The perlite sheet spacing that can increase the pearlitic transformation excess Temperature reduces sorbite percentage and reduces properties for follow, and it is meticulous and form troostite that the pearlitic transformation temperature is crossed the low perlite sheet spacing that can make, and also can affect the wire rod properties for follow.Therefore, must determine rational laying temperature and cooperate suitable cooling control after rolling technique, just can obtain the tissue that needs.
At an embodiment of the production technique of 65Mn spring steel wire rod of the present invention, the nominal diameter of wire rod finished product is 6.5mm.And one side total decarburized layer degree of depth of the wire rod finished product that obtains of the production technique of 65Mn spring steel wire rod is not more than 1.5% of wire rod finished product nominal diameter according to an exemplary embodiment of the present invention, and wherein total decarburized layer comprises ferrite and transition layer; Be mainly nodular troostite in the metallographic structure of wire rod finished product, sorbitic content is no less than 85%, and does not allow the tissue of martensite and the influential uses such as martensite remnant tissue, Wei Shi body and cementite network to exist; The actual measurement yield strength R of wire rod finished product
0 EL〉=795MPa, actual measurement tensile strength R
0 m〉=795MPa, elongation A 〉=12.5%, relative reduction in area Z 〉=32%.
65Mn spring steel wire rod according to the present invention then is the production technique preparation of adopting above-mentioned 65Mn spring steel wire rod.In an embodiment of 65Mn spring steel wire rod of the present invention, the nominal diameter of wire rod is 6.5mm; One side total decarburized layer degree of depth of wire rod is not more than 1.5% of wire rod finished product nominal diameter; Be mainly nodular troostite in the metallographic structure of wire rod, sorbitic content is no less than 85%; The actual measurement yield strength R of wire rod
0 EL〉=795MPa, actual measurement tensile strength R
0 m〉=990MPa, elongation A 〉=12.5%, relative reduction in area Z 〉=32%.
Particularly, the exemplary embodiment of the production technique of 65Mn spring steel wire rod can may further comprise the steps:
Raw material preparation, smelting molten steel, continuous casting become base, add hot continuously cast material, high temperature rolling becomes wire rod, roll rear control cooling, aftertreatment and obtain the wire rod finished product after weaving silk.
Be specially that raw material (blast-melted) → 50 ton converter steelmaking → LF external refining → protection continuous casting → steel billet check → (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 → six rolling → 1# flying shear crops (accident is cataclasm) of high-pressure water descaling → roughing → in roll six rolling → 2# flying shear crops; tail (accident is cataclasm) → in roll two rolling → pre-four rolling (comprising vertical kink) → 1# of finish rolling; 2# water cooling box cooling → 3# flying shear crop (accident is cataclasm) → Horizontal loose sleeve → BGV8 frame finish rolling → 3#; the empty mistake of 4# water cooling box cooling → TMB1 sinking mill; TMB2 fixed diameter rolling → 5# water cooling box closes → and (pinch roll) → Laying head → loose volume cooling → collection furls collection → extension volume → PF hook-type fortune machine and transports → check on the quality; sampling; wipe out end to end → compress the bundling → extension label of weighing → unload volume → warehouse-in → finished product to transport.
Wherein, the continuously cast bloom heating condition optimal control in the process furnace is as shown in table 2.
The heating condition of table 2 continuously cast bloom
The middle point for measuring temperature of preheating section is controlled at 790～810 ℃.Furnace atmosphere is week reduction, makes the top and bottom temperature difference, the total length temperature difference of continuously cast bloom all should be no more than 30 ℃.
To enter the temperature of finishing train entrance be 860～880 ℃ to wire rod during controlled rolling, and the temperature that wire rod enters reducing sizing mill group entrance is 860～880 ℃; Laying temperature is 870～890 ℃.
Roll rear control cooling and adopt stelmor control cold line to carry out, the control of stelmor roller-way speed is as shown in table 3, and the control of stelmor fan delivery is as shown in table 4, makes the surface temperature that enters the wire rod of collection reel after the cooling≤300 ℃.
Table 3 stelmor roller-way speed
| The roller-way section | 1 section | 2 sections | 3 sections | 4 sections | 5 sections | 6 sections | 7 sections |
| Roller-way speed (m/s) | 0.66 | 0.66 | 0.66 | 0.69 | 0.72 | 0.76 | 0.80 |
| The roller-way section | 8 sections | 9 sections | 10 sections | 11 sections | 12 sections | 13 sections | |
| Roller-way speed (m/s) | 0.84 | 0.88 | 0.88 | 0.88 | 0.88 | 0.88 |
Table 4 stelmor fan delivery
| The blower fan numbering | 1# | 2# | 3# | 4# | 5# | 6# | 7# | 8# | 9# | 10# |
| Air quantity (HZ) | 42 | 42 | 40 | 40 | 40 | 40 | 38 | 38 | 38 | 38 |
The mechanical performance index that the present embodiment will reach is as shown in table 5.
Table 5 mechanical performance index
One side total decarburized layer (ferrite+transition layer) degree of depth of the wire rod that the present embodiment obtains should be not more than 1.5% of wire rod nominal diameter, and metallographic structure is mainly nodular troostite, wherein sorbite is no less than 85%, does not allow the tissue of the influential uses such as martensite and martensite remnant tissue, Wei Shi body and cementite network to exist.
The below enumerates concrete example and comes exemplary embodiment of the present invention is further elaborated.Example only is used for explanation the present invention, and is not to limit by any way the present invention.
In the example below, it is 65Mn spring steel wire rod 3 stoves of 6.5mm that nominal diameter has been manufactured experimently in production, difference called after sample one, sample two and sample three, its concrete production technique is strictly undertaken by the production technique of above-mentioned 65Mn spring steel wire rod, therefore not to repeat here, the finished product of each sample of gained through the check after indices shown in table 6, table 7, table 8 and Figure 1A to Fig. 3 B.
The chemical composition of the 65Mn spring steel wire rod of table 6 Φ 6.5mm
The mechanical property of the 65Mn spring steel wire rod of table 7 Φ 6.5mm
As shown in Table 7, the sample one of the 65Mn spring steel wire rod of the Φ 6.5mm of trial-production to the mechanical property of sample three has all reached the internally controlling requirement value, and relative reduction in area Z is generally far above internally controlling requirement value, good mechanical performance.And, mechanical performance index all reaches even has far surpassed mechanical properties value after the thermal treatment of traditional 65Mn, the 65Mn spring steel wire rod of producing according to the production technique of 65Mn spring steel wire rod of the present invention possesses the mechanical property of wire rod after the drawing patenting in early stage, can satisfy thus the requirement of cancellation patenting operation in earlier stage, for downstream user reduces manufacturing procedure, reduce production costs.
The micro test interpretation of result of the 65Mn spring steel wire rod of table 8 Φ 6.5mm
Can be found out by table 8, Figure 1A to Fig. 3 B, the mirco structure quality of the 65Mn spring steel wire rod of producing according to the production technique of 65Mn spring steel wire rod of the present invention has also reached the level of traditional 65Mn spring steel after patenting, also can satisfy the requirement of downstream user cancellation drawing patenting in early stage.
In sum, adopt the production technique of 65Mn spring steel wire rod of the present invention, can take full advantage of the advanced production equipment of present high-speed wire rolling line and rolling water cooling system and the stelmor control cold line of outfit, and the metallographic structure by controlled rolling and controlled cooling control high-carbon steel wire rod, obtain higher sorbite rate.Finishing train and reducing sizing mill group adopt the 8+4 type and only use the rolling technology of front 8 finishing mills and 2 sizing units not only to guarantee production stability but also reduced production energy consumption, have solved the problem that same type machine production line tube reducing unit in the reducing sizing mill group equipment failure occurs or do not have to stop production with regard to palpus in the spare part situation in the industry.The production that Controlled Rolling And Controlled Cooling is applied to the 65Mn spring steel wire rod is rolling, not only can obtain preferably metallographic structure to obtain good combination of strength and toughness, and the patenting operation that can cancel early stage, reach the purpose that reduces cost, can also reduce simultaneously the 65Mn spring steel wire rod scale on surface content that obtains and improve recovery rate of iron, and to a certain degree reduce wire rod surface decarburization layer depth, reach the metallographic structure of optimization 65Mn spring steel wire rod and the purpose of over-all properties.
Although the above has described the present invention in conjunction with exemplary embodiment, those of ordinary skills should be clear, in the situation of the spirit and scope that do not break away from claim, can carry out various modifications to above-described embodiment.
Claims (8)
1. the production technique of a 65Mn spring steel wire rod is characterized in that, described production technique comprises following operation:
Raw material preparation, smelting molten steel, continuous casting become base, add hot continuously cast material, high temperature rolling becomes wire rod, roll rear control cooling, aftertreatment and obtain the wire rod finished product after weaving silk,
Wherein, by weight percentage, described wire rod finished product comprises Fe and the inevitable impurity of following chemical composition: C:0.63～0.68%, Si:0.15～0.30%, Mn:0.95～1.15%, P≤0.018%, S≤0.016%, Cr≤0.15%, Ni≤0.15%, Cu≤0.10%, Mo≤0.02%, Ti≤0.01%, Als≤0.015% and surplus;
In the described step that adds hot continuously cast material, control preheating section temperature is that 780～820 ℃, warm up time are 35～50 minutes, the heating zone temperature is that 960～1000 ℃, heat-up time are 35～50 minutes, the soaking zone temperature is that 1010～1050 ℃, soaking time are 30～40min, and the control furnace atmosphere is weak reducing atmosphere;
Become in the step of wire rod at described high temperature rolling, the control start rolling temperature is 960～1000 ℃, and finishing train and reducing sizing mill group adopt the 8+4 type to be rolled, and only uses front 8 finishing train and 2 reducing sizing mill groups;
In the step that control is cooled off after rolling after described weaving silk, the control laying temperature is 870～890 ℃, and adopt stelmor control cold line to carry out the rear control cooling of rolling of wire rod, the cooling rate that controlling board twists in before the pearlitic transformation is 13～15 ℃/s, the pearlitic transformation temperature is controlled at 660～710 ℃, cooling rate is 4～5 ℃/s after the phase transformation, makes the wire rod surface temperature that cooling is rear, aftertreatment is front be less than or equal to 300 ℃.
2. the production technique of 65Mn spring steel wire rod according to claim 1 is characterized in that, in the described step that adds hot continuously cast material, the middle point for measuring temperature temperature of controlling described preheating section is 790～810 ℃.
3. the production technique of 65Mn spring steel wire rod according to claim 1, it is characterized in that, described high temperature rolling becomes the step of wire rod to comprise to make continuously cast bloom to form successively the step of wire rod by roughing unit, intermediate mill, finishing train and reducing sizing mill group, wherein, the temperature that the control wire rod enters the finishing train entrance is 860～880 ℃, and the temperature that the control wire rod enters reducing sizing mill group entrance is 860～880 ℃.
4. the production technique of 65Mn spring steel wire rod according to claim 1 is characterized in that, the nominal diameter of described wire rod finished product is 6.5mm.
5. the production technique of 65Mn spring steel wire rod according to claim 1 is characterized in that, one side total decarburized layer degree of depth of described wire rod finished product is not more than 1.5% of wire rod finished product nominal diameter.
6. the production technique of 65Mn spring steel wire rod according to claim 1 is characterized in that, is mainly nodular troostite in the metallographic structure of described wire rod finished product, and sorbitic content is no less than 85%.
7. the production technique of 65Mn spring steel wire rod according to claim 1 is characterized in that, the actual measurement yield strength R of described wire rod finished product
0 EL〉=795MPa, actual measurement tensile strength R
0 m〉=990MPa, elongation A 〉=12.5%, relative reduction in area Z 〉=32%.
8. a 65Mn spring steel wire rod is characterized in that, described wire rod according to claim 1 in 8 the production technique of each described 65Mn spring steel wire rod make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210398901.1A CN102912101B (en) | 2012-10-19 | 2012-10-19 | Production process of 65 Mn spring steel wire rod and 65 Mn spring steel wire rod |
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| CN108866431A (en) * | 2018-06-11 | 2018-11-23 | 山东钢铁股份有限公司 | A kind of engineering machinery high-hardenability steel and its controlled rolling and controlled cooling preparation method |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006037159A (en) * | 2004-07-26 | 2006-02-09 | Nippon Steel Corp | Hot rolled wire rod for cold forging and production method therefor |
| CN101716721A (en) * | 2009-12-23 | 2010-06-02 | 南京钢铁股份有限公司 | Manufacturing process of spring steel wire rod |
| CN101717893A (en) * | 2009-12-15 | 2010-06-02 | 南京钢铁股份有限公司 | 55Si2MnVNbN spring steel and production process thereof |
| CN101773930A (en) * | 2010-01-21 | 2010-07-14 | 广州珠江钢铁有限责任公司 | Method for producing 65Mn hot rolled steel plate |
| CN101787493A (en) * | 2010-01-25 | 2010-07-28 | 广州市奥赛钢线科技有限公司 | Novel high-strength, fatigue-resistant and non-decarburized alloy spring steel and preparation method of steel wire thereof |
| CN102212673A (en) * | 2011-06-07 | 2011-10-12 | 武汉钢铁(集团)公司 | Control method of decarburization of continuously cast bloom for spring steel wire rods |
| CN102248146A (en) * | 2011-06-25 | 2011-11-23 | 内蒙古包钢钢联股份有限公司 | Continuous casting method for spring steel |
| CN102634735A (en) * | 2012-04-09 | 2012-08-15 | 广州市奥赛钢线科技有限公司 | Spring steel used for automobile suspension as well as preparation method and application thereof |
-
2012
- 2012-10-19 CN CN201210398901.1A patent/CN102912101B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006037159A (en) * | 2004-07-26 | 2006-02-09 | Nippon Steel Corp | Hot rolled wire rod for cold forging and production method therefor |
| CN101717893A (en) * | 2009-12-15 | 2010-06-02 | 南京钢铁股份有限公司 | 55Si2MnVNbN spring steel and production process thereof |
| CN101716721A (en) * | 2009-12-23 | 2010-06-02 | 南京钢铁股份有限公司 | Manufacturing process of spring steel wire rod |
| CN101773930A (en) * | 2010-01-21 | 2010-07-14 | 广州珠江钢铁有限责任公司 | Method for producing 65Mn hot rolled steel plate |
| CN101787493A (en) * | 2010-01-25 | 2010-07-28 | 广州市奥赛钢线科技有限公司 | Novel high-strength, fatigue-resistant and non-decarburized alloy spring steel and preparation method of steel wire thereof |
| CN102212673A (en) * | 2011-06-07 | 2011-10-12 | 武汉钢铁(集团)公司 | Control method of decarburization of continuously cast bloom for spring steel wire rods |
| CN102248146A (en) * | 2011-06-25 | 2011-11-23 | 内蒙古包钢钢联股份有限公司 | Continuous casting method for spring steel |
| CN102634735A (en) * | 2012-04-09 | 2012-08-15 | 广州市奥赛钢线科技有限公司 | Spring steel used for automobile suspension as well as preparation method and application thereof |
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| CN103305674A (en) * | 2013-06-13 | 2013-09-18 | 攀钢集团成都钢钒有限公司 | Method for controlling thickness of surface decarburized layer of hot-finished rod for steel cord |
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| CN105855299A (en) * | 2014-12-22 | 2016-08-17 | 北大方正集团有限公司 | Steel rolling method and steel obtained through method |
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| CN104745958A (en) * | 2015-03-31 | 2015-07-01 | 广东韶钢松山股份有限公司 | Steel wire rod for furniture spring and production method of steel wire rod |
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| CN105779725B (en) * | 2015-12-25 | 2018-03-23 | 江苏省沙钢钢铁研究院有限公司 | Wire rod rolling method for eliminating fine grains on surface of low-carbon steel |
| CN106399654A (en) * | 2016-09-09 | 2017-02-15 | 武汉钢铁股份有限公司 | Method for relieving pattern segregation of spring steel |
| CN106399654B (en) * | 2016-09-09 | 2018-08-07 | 武汉钢铁有限公司 | A method of improving spring steel pattern segregation |
| CN106756549A (en) * | 2016-12-14 | 2017-05-31 | 安徽楚江特钢有限公司 | A kind of automotive high-performance damping spring strip production methods |
| CN106756549B (en) * | 2016-12-14 | 2019-06-11 | 安徽楚江特钢有限公司 | A kind of automotive high-performance damping spring strip production methods |
| CN108220774A (en) * | 2016-12-22 | 2018-06-29 | 株式会社Posco | Wire rod, steel wire and its manufacturing method of excellent tenacity |
| CN108220774B (en) * | 2016-12-22 | 2020-05-26 | 株式会社Posco | Wire rod and steel wire having excellent toughness, and method for producing same |
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| CN106702119A (en) * | 2016-12-25 | 2017-05-24 | 首钢总公司 | Production method for spring steel bar free of complete decarburization |
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| CN107557680A (en) * | 2017-08-02 | 2018-01-09 | 包头钢铁（集团）有限责任公司 | Mill coil 65Mn of RE-treated and preparation method thereof |
| CN108866431A (en) * | 2018-06-11 | 2018-11-23 | 山东钢铁股份有限公司 | A kind of engineering machinery high-hardenability steel and its controlled rolling and controlled cooling preparation method |
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| CN109604351A (en) * | 2018-10-24 | 2019-04-12 | 河钢股份有限公司 | A kind of technique reducing spring steel skin decarburization depth |
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