CN102644036A - High-strength reinforcing steel bar with spiral fins and processing method of high-strength reinforcing steel bar - Google Patents

High-strength reinforcing steel bar with spiral fins and processing method of high-strength reinforcing steel bar Download PDF

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CN102644036A
CN102644036A CN2012101319886A CN201210131988A CN102644036A CN 102644036 A CN102644036 A CN 102644036A CN 2012101319886 A CN2012101319886 A CN 2012101319886A CN 201210131988 A CN201210131988 A CN 201210131988A CN 102644036 A CN102644036 A CN 102644036A
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tempering
steel bar
reinforcing steel
bar
quenching
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CN2012101319886A
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CN102644036B (en
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姚圣法
吴海洋
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江苏天舜金属材料集团有限公司
江苏国建新材料股份有限公司
溧阳市万兴特种建材有限公司
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Abstract

The invention relates to a reinforcing steel bar and a processing method thereof, in particular to a high-strength reinforcing steel bar with spiral fins and a processing method of the high-strength reinforcing steel bar. The high-strength reinforcing steel bar consists of following components including, in weight percentage, from 0.25 to 0.4% of C, from 0.1 to 0.2% of Si, from 0.3 to 0.45% of Mn, from 0.04 to 0.05% of Nb, from 0.08 to 0.09% of Cr, from 0.01 to 0.04% of V, from 0.002 to 0.003% of B, from 0.001 to 0.003% of Mo, from 0.015 to 0.03 of Al, from 0.002 to 0.003% of S, from 0.008 to 0.009% of Ti, from 0.004 to 0.005% of Ni, from 3 to 5% of composite rear earth and the balance Fe. The processing method includes using a roll to roll a reinforcing steel bar into a reinforcing steel bar with the continuous spiral fins on the surface in a hot state; feeding the reinforcing steel bar with the continuous spiral fins on the surface after hot rolling into a heating furnace and heating the reinforcing steel bar to the temperature of 880-990 DEG C; then fast cooling the reinforcing steel bar to the temperature of 650-680 DEG C by an online cooling device via compressed air or vaporous quenching liquid; quenching in a quenching device by water or quenching liquid for 15-25 seconds; and tempering after heating the reinforcing steel bar to the temperature of 500-550 DEG C via a tempering heating furnace. The high-strength reinforcing steel bar with the spiral fins has a good anchoring property, fine ductility and a high yielding-to-tensile ratio.

Description

A kind of high-strength spiral ribbed reinforced bar and working method thereof
Technical field
The present invention relates to a kind of reinforcing bar and working method thereof, a kind of specifically high-strength spiral ribbed reinforced bar and working method thereof.
Background technology
Reinforcing bar commonly used at present is a Deformed Steel Bars, is specially outside surface and has crescent screw thread with ribbing, and screw thread is vertical convex tendon, the cross rib tooth engaged, and discontinuous.All by the standard formulation of five sixties Soviet Union's structural steels, bar diameter specifically is widely used in building field to the size of this Deformed Steel Bars between 6~50mm, and uses till today always.Because the basic circle area occupation ratio of this Deformed Steel Bars physical dimension is 0.94, can not be stressed because of cross rib, useful area will lose about 6%~11%.Because the surface of this reinforcing bar has vertical convex tendon; It is on the weak side with concrete cohesive force and bond stress to be used for reinforced concrete works; Steel Concrete because of vertical convex tendon on surface makes concrete to the both sides splitting easily, is unfavorable for the interlock between concrete and the reinforcing bar under strained condition; And the cross rib tooth engaged is disperseed, and is prone to squeeze broken cut-out, promptly loses anchor force under the big slippage, and anchoring ductility is poor.
The application of spiral ribs in steel appears in the helix rib steel wire (being cold-drawn steel wire for prestressed concrete) first; Be specially the surface and have the salient rib of 4 continuous shapes; Helix rib steel wire is compared Deformed Steel Bars has remarkable advantages; Be embodied in: the anchoring property that ⑴ is good, the salient rib of shape makes and forms successive concave-convex clutch tooth between steel wire and concrete continuously, thereby reaches the ideal anchoring effect; ⑵ steel wire cross-sectional area has no loss, though steel wire forms rough surface topography through drawing, steel wire entire body xsect equates that cross-sectional area has no loss; ⑶ spiral ribs appearance is more reasonable, and spiral ribs is continuous on the one hand, and the long-pending weakening of basal plane is less, and the flank area still can bear pulling force; And Ribbed Bar (Deformed Steel Bars) can not be stressed because of cross rib, and useful area will lose about 6%-11%; Helix rib steel wire has the better anchoring strength and stiffness on the other hand, and still has than large bearing capacity (anchoring ductility is good) during big slippage, helps antidetonation; ⑷ many spiral ribs of helix rib steel wire rat, the concrete tooth engaged is generous and uninterrupted continuously, is difficult for fragmentation, cuts off; Squish area is big, and finned surface is long-pending big relatively, and splitting power is evenly non-directional; Has better anchoring ductility during little and later stage of therefore early stage slippage gross distortion; And general Ribbed Bar cross rib (Deformed Steel Bars) tooth engaged disperses to be prone to squeeze broken cut-out, promptly loses anchor force under the big slippage, and anchoring ductility is poor.
Above advantage be Deformed Steel Bars do not have; But the diameter of helix rib steel wire is between 6~10mm at present; Can't go out the spiral ribbed reinforced bar more than the output diameter 10mm according to its technology; Therefore do not have the above spiral ribbed reinforced bar of 10mm in the market, cause the application blank of the spiral ribbed reinforced bar of the above diameter of 10mm.
Helix rib steel wire (being cold-drawn steel wire for prestressed concrete); Its production technique be with steel mill the coil rod after rolling through acid washing phosphorization then through drawing; Carry out modifier treatment at last, wherein drawing is divided into 6 procedures again, and preceding 5 roads are in order to improve the performance of helix rib steel wire; Like hardness and intensity etc., the 6th procedure is to pull out the moulding spiral ribs through the spiral die drawing.Because its technology receives the restriction of tooling device and engineering request for utilization, only can produce 10mm, can not produce the reinforcing bar of big specification.
In addition, there are following shortcoming in existing this technology and the helix rib steel wire of producing thereof: improve intensity owing to carry out drawing earlier, carry out modifier treatment again, thereby make the ductility of helix rib steel wire relatively poor, strong flexor ratio is low; Owing to improve intensity through drawing, cause its lumber recovery low; Because mould often will change, cause production cost high; Because specification is too little, causes use range narrow; A large amount of spent acid that the acid washing phosphorization operation produces can't effectively be administered, serious environmental pollution; Continuous drawing all adopts many powerful drawing wire machinees, also serious waste the limited electric energy resource.
Because the spiral ribs of helix rib steel wire defective in shape own; Thereby cause its another one shortcoming to be: can not realize between any two helix rib steel wires that nut is stubborn solid; Promptly can not two helix rib steel wires be threaded, can only connect, increase link cost through ground tackle through nut; And existing Deformed Steel Bars can be accomplished above this point, and this also is one of advantage of present Deformed Steel Bars.
Summary of the invention
Technical problem to be solved by this invention is, overcomes the shortcoming of prior art, and a kind of high-strength spiral ribbed reinforced bar and working method thereof are provided, and has good anchoring property, and ductility is good, and strong flexor ratio is high.
The technical scheme that the present invention solves above technical problem is:
A kind of high-strength spiral ribbed reinforced bar, its appearance have at least one continuous shape spiral ribs of one, comprise following component: C:0.25~0.4% by weight percentage, Si:0.1~0.2%; Mn:0.3~0.45%, Nb:0.04~0.05%, Cr:0.08~0.09%; V:0.01~0.04%, B:0.002~0.003%, Mo:0.001~0.003%; Al:0.015%~0.03%, S:0.002~0.003%, Ti:0.008%~0.009%; Ni:0.004%~0.005%, compound rare-earth: 3~5%, surplus is Fe.
The working method of high-strength spiral ribbed reinforced bar, carry out according to the following steps:
⑴ will smelt good reinforcing bar and send into process furnace and be heated to 1150~1250 ℃; Be cooled fast to 700~750 ℃ through online refrigerating unit through pressurized air or vaporific hardening liquid then; Then in quenching device water or hardening liquid carry out for the time quench for 15~25 seconds; Be heated to 660~680 ℃ of tempering through the tempering process furnace then, arrive normal temperature through tempering refrigerating unit processing under cooling again;
⑵ be rolled into the surface with roll with reinforcing bar and have continuous shape spiral ribs, and hot-rolled temperature is 990~1150 ℃;
⑶ will be rolled into reinforcing bar that appearance has continuous shape spiral ribs and send into process furnace and be heated to 880~990; Be cooled fast to 650~680 ℃ through online refrigerating unit through pressurized air or vaporific hardening liquid then; Then in quenching device water or hardening liquid carry out for the time quench for 15~25 seconds; Be heated to 500~550 ℃ of tempering through the tempering process furnace then, arrive normal temperature through tempering refrigerating unit processing under cooling again.
Because twice different thermal treatment process before and after working method of the present invention adopts; Thermal treatment for the first time can make the performance that does not have hot rolling reinforcing bar before to obtain conveniently to be rolled into continuous shape spiral ribs: strength grade is at 600~770Mpa; About strong flexor ratio 1.13, metallographic structure is to be made up of ferritic and martensitic stucture; Thermal treatment for the second time then is used to improve the performance with continuous shape spiral ribbed reinforced bar: strength grade is at 1000~1570Mpa, and strong flexor ratio is greater than more than 1.15, and metallographic structure is to be made up of ferritic, sorbite and troostitic structures.
The technical scheme that the present invention further limits is:
Aforesaid high-strength spiral ribbed reinforced bar in the compound rare-earth, comprises following component: La:25~35% by weight percentage, Ce:15~20%, Y:5~8%, Sc:7~12%, Gd:3~5%, Sm:5~7%, Dy:3~5%, Pr:10~20%.Through increasing compound rare-earth, can be convenient to reinforcing bar is rolled into continuous shape spiral ribs on the one hand, and improved the performance of reinforcing bar on the other hand: high ductility and high strong flexor ratio, ductility are higher than helix rib steel wire 30~50% well, and strong flexor ratio is higher than helix rib steel wire 15~20%.
Aforesaid high-strength spiral ribbed reinforced bar, it is 90 °~95 ° that two tangent tangent lines of each bar continuous shape spiral ribs dual-side and rebar surface form angle.
Aforesaid high-strength spiral ribbed reinforced bar, the width of the continuous shape spiral ribs of each bar is 3~3.5mm, highly is 0.5~0.9mm.
The working method of aforesaid high-strength spiral ribbed reinforced bar; Roll comprises following component: C:0.35~0.45% by weight percentage, Mn:0.25~0.35%, Si:0.15~0.25%; Cr:2.15~3. 05%; Mo:0.05~0.08%, Al:0.012~0.014%, all the other are Fe and unavoidable impurities;
Roll need carry out following surface treatment: 1. heating: Heating temperature is 770~790 ℃; 2. cooling: be cooled to 500~700 ℃ with 5~10 ℃/s cooling rate; 3. quench: water or hardening liquid carry out 15~25 seconds quenching in quenching device; 4. tempering: tempering temperature is 600~630 ℃.
After using the above roll and surface treatment that becomes to be grouped into, fine carbide is separated out in a large number in becoming martensitic matrix fully, form the high tissue of hardness; Roll hardness is bigger slightly than hot rolled reinforcing bar required for the present invention; Strength grade be prone to form continuous shape spiral ribs in the hot rolling of reinforcing bar surface, but hardness can not be excessive at 900~1000Mpa; The too big damage easily of hardness reinforcing bar body, the hot rolling lumber recovery is lower.Therefore, select the roll of above composition for use, hardness is suitable, but hot rolling goes out continuous shape spiral ribs required for the present invention.
The working method of spiral ribbed reinforced bar of the present invention can be produced the spiral ribbed reinforced bar of all size, comprises specification and the above big specification of 50mm between appointing among 6~50mm; Through different thermal treatment process, not only can produce the prestressed spiral rib steel muscle, can also produce high-strength spiral ribbed reinforced bar.
Spiral ribbed reinforced bar of the present invention has the good anchoring property of the advantage that helix rib steel wire has: ⑴, and the salient rib of shape makes and forms successive concave-convex clutch tooth between reinforcing bar and concrete continuously, thereby reaches the ideal anchoring effect; ⑵ bar cross section amasss has no loss, and the entire body xsect equates; ⑶ spiral ribs appearance is more reasonable, and spiral ribs is continuous on the one hand, and the long-pending weakening of basal plane is less, and the flank area still can bear pulling force; Spiral ribbed reinforced bar has the better anchoring strength and stiffness on the other hand, and still has than large bearing capacity (anchoring ductility is good) during big slippage, helps antidetonation; ⑷ many spiral ribs of spiral ribbed reinforced bar rat, the concrete tooth engaged is generous and uninterrupted continuously, is difficult for fragmentation, cuts off; Squish area is big, and relatively finned surface is long-pending big, and splitting power is evenly non-directional, has better anchoring ductility during little and later stage of therefore early stage slippage gross distortion.
The spiral ribbed reinforced bar that explained hereafter of the present invention goes out not only has above advantage, and also have present helix rib steel wire and following advantage that Deformed Steel Bars did not have: ⑴ ductility is good, is higher than helix rib steel wire 30~50%; ⑵ strong flexor ratio is high, is higher than helix rib steel wire 15~20%; ⑶ have present Deformed Steel Bars can twist solid characteristics through nut, in conjunction with both great advantage, reduces ground tackle and becomes, and reduces by 80% link cost; ⑷ reach 100% (Deformed Steel Bars will lose about 6%-11%) with the concrete useful area that combines; ⑸ improved reinforcing bar and concrete bond stress and bonding force, and the prestressed transmission length that extended has reduced prestressed loss power simultaneously; ⑹ improved at least 30% SF, and wherein 15-20% improves generation by its ductility and strong flexor ratio, and 10-20% is by its generation that is threaded.
Technology of the present invention has the following advantages: ⑴ need not use hydrochloric acid or sulfuric acid to carry out pickling and phosphatization, benefits environmental protection; ⑵ adopt on-line continuous air cooling and quenching technology technology, can make the product strength grade at 600~1570Mpa, and elongation is greater than more than 10%, and strong flexor ratio is greater than more than 1.15, and elongation is high, intensity is high; ⑶ the strength grade of the on-line continuous air cooling Technology that adopt is at 600~900Mpa; Metallographic structure is to be made up of ferritic, martensite, a small amount of bainite structure; Wherein ferritic is evenly distributed in martensite and the bainite structure; The strength grade of the quenching technology technology that adopts is at 1000~1570Mpa, and metallographic structure is to be made up of ferritic, sorbite and troostitic structures; ⑷ roll adopts serpentine two-way system groove, has realized the seamless link between the rebar surface spiral, does not have vertical convex tendon, and its basic circle area occupation ratio is 1.0, has strengthened and concrete cohesive force, prevents concrete splitting phenomenon under strained condition.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is the sectional view of Fig. 1.
Embodiment
Embodiment 1
Present embodiment proposes a kind of high-strength spiral ribbed reinforced bar; Structure is shown in 1; Comprise two spiral ribs 2 of reinforcing bar body 1 and reinforcing bar surface, spiral ribs 2 is continuous distribution in the reinforcing bar surface, and it is 90 ° that two tangent tangent lines of continuous shape spiral ribs 2 dual-sides of each bar and rebar surface form angle; The width of the continuous shape spiral ribs of each bar is 3mm, highly is 0.5mm.
The high-strength spiral ribbed reinforced bar of present embodiment comprises following component: C:0.25% by weight percentage, Si:0.1%, Mn:0.3%; Nb:0.04%, Cr:0.08%, V:0.01%, B:0.002%; Mo:0.001%, Al:0.015%, S:0.002%, Ti:0.008%; Ni:0.004%, compound rare-earth: 3%, surplus is Fe.In the compound rare-earth, comprise following component: La:25% by weight percentage, Ce:20%, Y:8%, Sc:12%, Gd:5%, Sm:5%, Dy:5%, Pr:20%.
The working method of high-strength spiral ribbed reinforced bar, carry out according to the following steps:
⑴ will smelt good reinforcing bar and send into process furnace and be heated to 1150 ℃; Be cooled fast to 700 ℃ through online refrigerating unit through pressurized air or vaporific hardening liquid then; Then in quenching device water or hardening liquid carry out for the time quench for 15 seconds; Be heated to 660 ℃ of tempering through the tempering process furnace then, arrive normal temperature through tempering refrigerating unit processing under cooling again.
⑵ be rolled into the surface with roll with reinforcing bar and have continuous shape spiral ribs, and hot-rolled temperature is 990 ℃, and roll comprises following component: C:0.35% by weight percentage; Mn:0.25%, Si:0.15%, Cr:2.15%; Mo:0.05%, Al:0.012%, all the other are Fe and unavoidable impurities; Roll need carry out following surface treatment: 1. heating: Heating temperature is 770 ℃; 2. cooling: be cooled to 500 ℃ with 5 ℃/s cooling rate; 3. quench: water or hardening liquid carry out 15 seconds quenching in quenching device; 4. tempering: tempering temperature is 600 ℃;
⑶ will be rolled into reinforcing bar that appearance has continuous shape spiral ribs and send into process furnace and be heated to 880 ℃; Be cooled fast to 650 ℃ through online refrigerating unit through pressurized air or vaporific hardening liquid then; Then in quenching device water or hardening liquid carry out for the time quench for 15 seconds; Be heated to 500 ℃ of tempering through the tempering process furnace then, arrive normal temperature through tempering refrigerating unit processing under cooling again.
Embodiment 2
Present embodiment proposes a kind of high-strength spiral ribbed reinforced bar; Structure is shown in 1; Comprise two spiral ribs 2 of reinforcing bar body 1 and reinforcing bar surface, spiral ribs 2 is continuous distribution in the reinforcing bar surface, and it is 92 ° that two tangent tangent lines of continuous shape spiral ribs 2 dual-sides of each bar and rebar surface form angle; The width of the continuous shape spiral ribs of each bar is 3.3mm, highly is 0.7mm.
The high-strength spiral ribbed reinforced bar of present embodiment comprises following component: C:0.3% by weight percentage, Si:0.15%, Mn:0.4%; Nb:0.045%, Cr:0.085%, V:0.03 %, B:0.0025%; Mo:0.002%, Al:0.025%, S:0.0025%, Ti:0.0085%; Ni:0.0045%, compound rare-earth: 4%, surplus is Fe.In the compound rare-earth, comprise following component: La:33% by weight percentage, Ce:17%, Y:5%, Sc:10%, Gd:5%, Sm:7%, Dy:3%, Pr:20%.
The working method of high-strength spiral ribbed reinforced bar, carry out according to the following steps:
⑴ will smelt good reinforcing bar and send into process furnace and be heated to 1200 ℃; Be cooled fast to 720 ℃ through online refrigerating unit through pressurized air or vaporific hardening liquid then; Then in quenching device water or hardening liquid carry out for the time quench for 20 seconds; Be heated to 670 ℃ of tempering through the tempering process furnace then, arrive normal temperature through tempering refrigerating unit processing under cooling again.
⑵ be rolled into the surface with roll with reinforcing bar and have continuous shape spiral ribs, and hot-rolled temperature is 1100 ℃, and roll comprises following component: C:0.40% by weight percentage; Mn:0.30%, Si:0.20%, Cr:2.85%; Mo:0.07%, Al:0.013%, all the other are Fe and unavoidable impurities; Roll need carry out following surface treatment: 1. heating: Heating temperature is 780 ℃; 2. cooling: be cooled to 600 ℃ with 8 ℃/s cooling rate; 3. quench: water or hardening liquid carry out 20 seconds quenching in quenching device; 4. tempering: tempering temperature is 610 ℃;
⑶ will be rolled into reinforcing bar that appearance has continuous shape spiral ribs and send into process furnace and be heated to 900 ℃; Be cooled fast to 660 ℃ through online refrigerating unit through pressurized air or vaporific hardening liquid then; Then in quenching device water or hardening liquid carry out for the time quench for 20 seconds; Be heated to 530 ℃ of tempering through the tempering process furnace then, arrive normal temperature through tempering refrigerating unit processing under cooling again.
Embodiment 3
Present embodiment proposes a kind of high-strength spiral ribbed reinforced bar; Structure is shown in 1; Comprise two spiral ribs 2 of reinforcing bar body 1 and reinforcing bar surface, spiral ribs 2 is continuous distribution in the reinforcing bar surface, and it is 95 ° that two tangent tangent lines of continuous shape spiral ribs 2 dual-sides of each bar and rebar surface form angle; The width of the continuous shape spiral ribs of each bar is 3.5mm, highly is 0.9mm.
The high-strength spiral ribbed reinforced bar of present embodiment comprises following component: C:0.4% by weight percentage, Si:0.2%, Mn:0.45%; Nb:0.05%, Cr:0.09%, V:0.04 %, B:0.003%; Mo:0.003%, Al:0.03%, S:0.003%, Ti:0.009%; Ni:0.005%, compound rare-earth: 5%, surplus is Fe.In the compound rare-earth, comprise following component: La:35% by weight percentage, Ce:15%, Y:7%, Sc:11%, Gd:4%, Sm:6%, Dy:4%, Pr:18%.
The working method of high-strength spiral ribbed reinforced bar, carry out according to the following steps:
⑴ will smelt good reinforcing bar and send into process furnace and be heated to 1250 ℃; Be cooled fast to 750 ℃ through online refrigerating unit through pressurized air or vaporific hardening liquid then; Then in quenching device water or hardening liquid carry out for the time quench for 25 seconds; Be heated to 680 ℃ of tempering through the tempering process furnace then, arrive normal temperature through tempering refrigerating unit processing under cooling again.
⑵ be rolled into the surface with roll with reinforcing bar and have continuous shape spiral ribs, and hot-rolled temperature is 1150 ℃, and roll comprises following component: C:0.45% by weight percentage; Mn:0.35%, Si:0.25%, Cr:3. 05%; Mo:0.08%, Al:0.014%, all the other are Fe and unavoidable impurities; Roll need carry out following surface treatment: 1. heating: Heating temperature is 790 ℃; 2. cooling: be cooled to 700 ℃ with 10 ℃/s cooling rate; 3. quench: water or hardening liquid carry out 25 seconds quenching in quenching device; 4. tempering: tempering temperature is 630 ℃;
⑶ will be rolled into reinforcing bar that appearance has continuous shape spiral ribs and send into process furnace and be heated to 990 ℃; Be cooled fast to 680 ℃ through online refrigerating unit through pressurized air or vaporific hardening liquid then; Then in quenching device water or hardening liquid carry out for the time quench for 25 seconds; Be heated to 550 ℃ of tempering through the tempering process furnace then, arrive normal temperature through tempering refrigerating unit processing under cooling again.
Except that the foregoing description, the present invention can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection domain of requirement of the present invention.

Claims (6)

1. high-strength spiral ribbed reinforced bar, its appearance has at least one continuous shape spiral ribs of one, it is characterized in that: comprise following component: C:0.25~0.4% by weight percentage, Si:0.1~0.2%; Mn:0.3~0.45%, Nb:0.04~0.05%, Cr:0.08~0.09%; V:0.01~0.04%, B:0.002~0.003%, Mo:0.001~0.003%; Al:0.015%~0.03%, S:0.002~0.003%, Ti:0.008%~0.009%; Ni:0.004%~0.005%, compound rare-earth: 3~5%, surplus is Fe.
2. high-strength spiral ribbed reinforced bar as claimed in claim 1 is characterized in that: in the said compound rare-earth, comprise following component: La:25~35% by weight percentage, Ce:15~20%; Y:5~8%, Sc:7~12%, Gd:3~5%; Sm:5~7%, Dy:3~5%, Pr:10~20%.
3. according to claim 1 or claim 2 high-strength spiral ribbed reinforced bar, it is characterized in that: it is 90 °~95 ° that two tangent tangent lines of said each bar continuous shape spiral ribs dual-side and rebar surface form angles.
4. according to claim 1 or claim 2 high-strength spiral ribbed reinforced bar, it is characterized in that: the width of the continuous shape spiral ribs of said each bar is 3~3.5mm, highly is 0.5~0.9mm.
5. the working method of high-strength spiral ribbed reinforced bar according to claim 1 or claim 2 is characterized in that: carry out according to the following steps:
⑴ will smelt good reinforcing bar and send into process furnace and be heated to 1150~1250 ℃; Be cooled fast to 700~750 ℃ through online refrigerating unit through pressurized air or vaporific hardening liquid then; Then in quenching device water or hardening liquid carry out for the time quench for 15~25 seconds; Be heated to 660~680 ℃ of tempering through the tempering process furnace then, arrive normal temperature through tempering refrigerating unit processing under cooling again;
⑵ be rolled into the surface with roll with reinforcing bar and have continuous shape spiral ribs, and hot-rolled temperature is 990~1150 ℃;
⑶ will be rolled into reinforcing bar that appearance has continuous shape spiral ribs and send into process furnace and be heated to 880~990 ℃; Be cooled fast to 650~680 ℃ through online refrigerating unit through pressurized air or vaporific hardening liquid then; Then in quenching device water or hardening liquid carry out for the time quench for 15~25 seconds; Be heated to 500~550 ℃ of tempering through the tempering process furnace then, arrive normal temperature through tempering refrigerating unit processing under cooling again.
6. the working method of high-strength spiral ribbed reinforced bar as claimed in claim 5; It is characterized in that: said roll comprises following component: C:0.35~0.45% by weight percentage, Mn:0.25~0.35%, Si:0.15~0.25%; Cr:2.15~3. 05%; Mo:0.05~0.08%, Al:0.012~0.014%, all the other are Fe and unavoidable impurities;
Said roll need carry out following surface treatment:
Heating: Heating temperature is 770~790 ℃;
Cooling: be cooled to 500~700 ℃ with 5~10 ℃/s cooling rate;
Quench: water or hardening liquid carry out 15~25 seconds quenching in quenching device;
Tempering: tempering temperature is 600~630 ℃.
CN 201210131988 2012-04-28 2012-04-28 High-strength reinforcing steel bar with spiral fins and processing method of high-strength reinforcing steel bar CN102644036B (en)

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CN103498104A (en) * 2013-09-26 2014-01-08 江苏天舜金属材料集团有限公司 630 MPa-grade high-strength hot-rolled reinforced bar and production process thereof
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CN103639402A (en) * 2013-11-21 2014-03-19 江苏天舜金属材料集团有限公司 Method for manufacturing prestress steel strand coated with nichrome powder
CN103643143A (en) * 2013-11-20 2014-03-19 江苏天舜金属材料集团有限公司 600MPa-grade green-heat-treatment high-strength steel bar and processing method thereof
CN103643164A (en) * 2013-11-12 2014-03-19 铜陵市肆得科技有限责任公司 Red-hardness high alloy steel material for pump valves and preparation method thereof
CN103938119A (en) * 2014-04-16 2014-07-23 江苏盛大金属制品有限公司 Special high-strength and high-plasticity reinforcing steel bars for high speed railways
CN103934653A (en) * 2014-04-16 2014-07-23 江苏盛大金属制品有限公司 Method for processing high-strength high-ductility reinforcing steel bars special for high speed railway
CN104313512A (en) * 2014-11-07 2015-01-28 江苏天舜金属材料集团有限公司 High-tensile steel bar used for reinforced concrete and manufacturing method of same
CN104328352A (en) * 2014-11-07 2015-02-04 江苏天舜金属材料集团有限公司 High-strength prestressed wire and heat treatment method thereof
CN104372951A (en) * 2014-11-08 2015-02-25 江苏天舜金属材料集团有限公司 Processing method for chrome molybdenum low alloy prestressed steel reinforcement connection joint
CN106734245A (en) * 2016-09-19 2017-05-31 石横特钢集团有限公司 The solution of Screw Steel Cold-Bended cracking

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CN103498104B (en) * 2013-09-26 2015-06-24 江苏天舜金属材料集团有限公司 630 MPa-grade high-strength hot-rolled reinforced bar and production process thereof
CN103498104A (en) * 2013-09-26 2014-01-08 江苏天舜金属材料集团有限公司 630 MPa-grade high-strength hot-rolled reinforced bar and production process thereof
CN103614643A (en) * 2013-10-24 2014-03-05 铜陵市经纬流体科技有限公司 An alloy steel material used for slewing bearing circular tracks of excavators and a preparation method of the alloy steel material
CN103643164A (en) * 2013-11-12 2014-03-19 铜陵市肆得科技有限责任公司 Red-hardness high alloy steel material for pump valves and preparation method thereof
CN103643143A (en) * 2013-11-20 2014-03-19 江苏天舜金属材料集团有限公司 600MPa-grade green-heat-treatment high-strength steel bar and processing method thereof
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CN103639402B (en) * 2013-11-21 2015-10-28 江苏天舜金属材料集团有限公司 The manufacture method of the coated prestress wire of a kind of nichrome powder
CN103938119A (en) * 2014-04-16 2014-07-23 江苏盛大金属制品有限公司 Special high-strength and high-plasticity reinforcing steel bars for high speed railways
CN103934653A (en) * 2014-04-16 2014-07-23 江苏盛大金属制品有限公司 Method for processing high-strength high-ductility reinforcing steel bars special for high speed railway
CN104313512A (en) * 2014-11-07 2015-01-28 江苏天舜金属材料集团有限公司 High-tensile steel bar used for reinforced concrete and manufacturing method of same
CN104328352B (en) * 2014-11-07 2017-03-01 刘诗琦 A kind of high-strength prestressed steel wire and its heat treatment method
CN104328352A (en) * 2014-11-07 2015-02-04 江苏天舜金属材料集团有限公司 High-strength prestressed wire and heat treatment method thereof
CN104372951A (en) * 2014-11-08 2015-02-25 江苏天舜金属材料集团有限公司 Processing method for chrome molybdenum low alloy prestressed steel reinforcement connection joint
CN106734245A (en) * 2016-09-19 2017-05-31 石横特钢集团有限公司 The solution of Screw Steel Cold-Bended cracking

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