CN103614637A - Rack steel coil rod for combing and production method thereof - Google Patents
Rack steel coil rod for combing and production method thereof Download PDFInfo
- Publication number
- CN103614637A CN103614637A CN201310582207.XA CN201310582207A CN103614637A CN 103614637 A CN103614637 A CN 103614637A CN 201310582207 A CN201310582207 A CN 201310582207A CN 103614637 A CN103614637 A CN 103614637A
- Authority
- CN
- China
- Prior art keywords
- cooling
- refining
- coil rod
- wire rod
- production method
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Abstract
The invention relates to a rack steel coil rod for combing and a production method thereof. The rack steel coil rod comprises the following components in percentage by weight (wt%): 0.72-0.76wt% of C, 0.15-0.25wt% of Si, 0.70-0.80wt% of Mn, less than or equal to 0.018wt% of P, less than or equal to 0.015wt% of S, 0.20-0.40wt% of Cr, 0.10-0.30wt% of V, 0.02-0.08wt% of Nb and the balance of Fe and inevitable impurities. The manufacturing method of the coil rod sequentially comprises the following steps: smelting; external refining; continuous casting; high line controlled rolling; and controlled cooling. The coil rod provided by the invention has the advantages of high sorbitizing rate, high plasticity, good drawing performance, good hardenability and the like, and is simple in preparation process and low in cost. In the drawing process of the coil rod, a lead bath treatment step in the middle drawing period can be omitted so as to realize the effects of saving energy sources, reducing pollution, improving the yield and lowering the using cost, so that the production and using requirements of rack steel wires can be fully satisfied.
Description
Technical field
The present invention relates to tooth bar steel and production technique thereof for a kind of combing, relate in particular to the tooth bar steel that one lead bath of a kind of omission processed, tensile strength is below 1250MPa, and reduction of area, more than 35%, belongs to ferrous metallurgy and steel rolling field.
Background technology
The tooth bar steel combing industry that is used for weaving, after common tooth bar steel is made finished product tempering, grain fineness number is thick, and hardness and wear resistance are not enough, and work-ing life is lower, is badly in need of the tooth bar steel of development of new.In addition, the traditional technique of tooth bar steel is: Φ 5.5mm → rough → Φ 3.2mm → direct-fired heater normalizing treatment (lead bath processing) → carefully draw → Φ 2.2mm → direct-fired heater normalizing treatment (lead bath processing) → carefully draw → Φ 1.04mm or 1.13mm → Spheroidizing Annealing (non-oxidation bell-type spheroidizing annealing furnace) → 3～5 frame tandem rollings (special-shaped flat) → rush tooth → flame quenching processing → induction heating tempering processing → finished product.During drawing, often will process through multi-pass lead bath, wire drawing processing cost is higher.Therefore, for tooth bar steel sector application present situation, be badly in need of developing a kind of have certain degree of hardness, intensity, wear resistance, have simultaneously and reduce the new steel grade that passage is processed in lead bath, a lead bath of every omission is processed, and ton steel reduces costs 1000 yuan.In order to meet growing performance requriements, the tooth bar steel of production, except guaranteeing finally to have higher hardness, intensity, wear resistance, also will have higher plasticity before drawing, just have like this, omits the effect that a lead bath is processed.Existing tooth bar 70 steel often will be processed through double normalizing, the larger energy dissipation causing, and the tooth bar wear resistance of making and hardness deficiency, life-span is lower, the combined microalloying means of arranging in pairs or groups by Nb, the V designing, can overcome existing steel grade hardness not enough, the feature wear no resistance, the life-span being low, cost is high, product performance have obtained larger improvement, and have significantly saved production cost.
Summary of the invention
One of object of the present invention is to provide a kind of combing tooth bar steel wire rod, the advantages such as this wire rod has high sorbitic rate, high-ductility, drawing property is good, hardening capacity is good, its tensile strength is below 1250MPa, and reduction of area, more than 35%, meets production and the service requirements of rack wire completely.
Solving the technical scheme that its technical problem adopts is:
A kind of combing tooth bar steel wire rod, the following component that it is calculated by weight percent forms: C0.72～0.76%, Si0.15～0.25%, Mn0.70～0.80%, P≤0.018%, S≤0.015%, Cr0.20～0.40%, V0.10～0.30%, Nb0.02～0.08%, surplus is iron and inevitable impurity.
Another object of the present invention is to provide the production method of the tooth bar steel wire rod of a kind of grain fineness, high-hardenability, high abrasion, the method comprises that electrosmelting, external refining, continuous small-billet casting, square billet sharpening, the high line traffic control of carrying out are successively rolled, stelmor control cooling working procedure, is specially:
(1), in electrosmelting operation, 1600～1620 ℃ of tapping temperatures, add silico-calcium-silicomanganese-ferrosilicon-carbon dust-ferrochrome-synthetic slag-lime and fluorite successively after tapping;
(2) in refining procedure, add silicon calcium powder or calcium carbide to carry out diffusive deoxidation in batches, fine setting molten steel chemical composition, refining basicity is controlled at 0.95～1.15, and more than keeping brown slag 25min, the refining later stage adds ferro-niobium and vanadium iron, more than controlling weak Argon 18min;
(3) during continuous casting, superheating temperature is controlled at 20～35 ℃, and pulling rate is controlled at 2.3～2.5m/min;
(4) when high speed wire rolling, start rolling temperature is 1050～1100 ℃, and laying temperature is 860～880 ℃;
(5) refrigerating work procedure adopts stelmo line cooling control technology, air-cooled after weaving silk, and opens front two Fans, all the other blower fans cut out, and First fan delivery is that 100%, the second Fans air quantity is 50%, cooling rate is 16～19K/s, be cooled to after 650～680 ℃, close continuously 10 insulation covers, carry out slow cooling, speed of cooling is 0.9～2.5K/s, while being cooled to 580～620 ℃, open stay-warm case, carry out air cooling.
Below technology contents of the present invention is elaborated:
Cr can improve wear resistance, intensity, hardness, the hardening capacity of wire rod, but too much Cr also can promote martensitic formation; V, Nb are carbide, can in steel, form tiny C, N compound, improve wear resistance, and have larger solid solubility in austenitic temperature interval, can form the grain fineness number of refinement.Through long-term research and practice, adopt C0.72～0.76%, Si0.15～0.25%, Mn0.70～0.80%, P≤0.018%, S≤0.015%, Cr0.20～0.40%, V0.10～0.30%, the steel grade that Nb0.02～0.08% develops, can keep lower cost, can reach tensile strength <1250MPa again, more than reduction of area >35%.In order to prepare above-mentioned wire rod, select high-quality steel scrap and blast-melted smelting, during smelting, add the elements such as Cr, V, Nb, in order to guarantee that C, the N compound of V, Nb fully dissolve, play the effect of crystal grain thinning, start rolling temperature is controlled at 1050～1100 ℃ of left and right, and laying temperature is controlled at 860～880 ℃, simultaneously, according to Gleeble analog result, under speed of cooling below 2.5K/s, this steel grade wire rod could form desirable tissue, and therefore, the design difficulty of technique is larger.So employing is first cold soon, rear slow cooling, then the syllogic method of cooling of air cooling.
Compared with prior art, beneficial effect of the present invention is: adopt 140mm
2the novel tooth bar steel wire rod of little billet production, in the situation that containing the stronger alloy of multiple hardening capacity, by the rolling technology of design, compared with common steel grade, reduction of area increases, reached more than 35%, plasticity is improved, and has reached and has omitted the object that a lead bath is processed, significantly reduced user's production cost, the alloying element simultaneously adding, has increased the wear resistance of product, the life-span of having improved tooth bar.
Accompanying drawing explanation
Fig. 1 is the embodiment of the present invention 1 wire rod metallographic structure picture;
Fig. 2 is the embodiment of the present invention 2 wire rod metallographic structure pictures.
Embodiment
Below in conjunction with embodiment, the present invention is described further, but embodiment should not be construed as limitation of the present invention.
Embodiment 1
The contained component of tooth bar steel and weight percent are: C:0.73%, and Si:0.20%, Mn:0.66%, P:0.008%, S:0.0018%, Cr:0.30%, V:0.12%, Nb:0.07%, all the other are iron and inevitable impurity element.Wire rod diameter is 5.5mm, and its production process is: electrosmelting → external refining → continuous casting 140mm
2the control of roll → stelmor of square billet → high line traffic control is cold, and smelting employing high-quality steel scrap and molten iron is that raw material carries out electrosmelting, and 1620 ℃ of tapping temperatures, add silico-calcium-silicomanganese-ferrosilicon-carbon dust-ferrochrome-synthetic slag-lime and fluorite successively after tapping.Refining temperature, at 1500～1560 ℃, adds silicon calcium powder or calcium carbide to carry out diffusive deoxidation in batches, and refining basicity is controlled at 0.95～1.15, slag keeps brown 26min, and the refining later stage adds ferro-niobium and vanadium iron, refining time 35 minutes, adopt the argon flow amount of 0.1MPa, soft churning time 20 minutes; 1540 ℃ of refining tapping temperatures.1495 ℃ of continuous casting temperature, 30 ℃ of superheating temperature, pulling rate is controlled at 2.3～2.5m/min.Crystallizer stir current 400A, frequency is 3.3Hz, and end stir current is 500A, and frequency is 12Hz.Start rolling temperature is 1090 ℃, and laying temperature is 860 ℃; Each section of roller speed of stelmor is 0.990m/s, 1.080m/s, 1.143m/s, 1.183m/s, 1.183m/s, 1.065m/s, 1.065m/s, 0.905m/s, 0.77m/s, 0.70m/s.After weaving silk, speed of cooling is opened first two, and fan delivery is respectively 100%, 50%, and cooling rate reaches 16 ℃/s, after enter slow cooling section, cover ten stay-warm cases, enter 670 ℃ of stay-warm case temperature, then with the cooling rate slow cooling of 2 ℃/s, going out stay-warm case temperature is 620 ℃, after adopt air cooling.Gained wire rod diameter is 5.5mm, and the tensile strength of former wire rod is average out to 1172.5MPa, relative reduction in area average 51%.Scanning electron microscope examination metallographic structure is mainly fine pearlite, i.e. 89% sorbite.Heart portion does not have martensite, and every check meets the demands.
Embodiment 2
The contained component of tooth bar steel and weight percent are: C:0.73%, and Si:0.23%, Mn:0.73%, P:0.013%, S:0.008%, Cr:0.29%, V:0.15%, Nb:0.02%, all the other are iron and inevitable impurity element.Wire rod diameter is 5.5mm, and its production process is: electrosmelting → external refining → continuous casting 140mm
2the control of roll → stelmor of square billet → high line traffic control is cold, and smelting employing high-quality steel scrap and molten iron is that raw material carries out electrosmelting, and 1610 ℃ of tapping temperatures, add silico-calcium-silicomanganese-ferrosilicon-carbon dust-ferrochrome-synthetic slag-lime and fluorite successively after tapping.In refining procedure, add silicon calcium powder or calcium carbide to carry out diffusive deoxidation in batches, fine setting molten steel chemical composition, refining temperature is at 1500～1560 ℃, and refining basicity is controlled at 0.95～1.15, keeps brown slag 28min, the refining later stage adds ferro-niobium and vanadium iron, refining time 37 minutes, the argon flow amount of employing 0.1MPa, soft churning time 20 minutes; 1540 ℃ of refining tapping temperatures.1495 ℃ of continuous casting temperature, 30 ℃ of superheating temperature, pulling rate is controlled at 2.3～2.5m/min.Crystallizer stir current 400A, frequency is 3.3Hz, and end stir current is 500A, and frequency is 12Hz.Start rolling temperature is 1100 ℃, and laying temperature is 870 ℃; Each section of roller speed of stelmor is 0.990m/s, 1.080m/s, 1.143m/s, 1.183m/s, 1.183m/s, 1.065m/s, 1.065m/s, 0.905m/s, 0.77m/s, 0.70m/s.After weaving silk, speed of cooling is opened first two, and fan delivery is respectively 100%, 50%, and cooling rate reaches 16 ℃/s, after enter slow cooling section, cover ten stay-warm cases, enter 650 ℃ of temperature, then with the cooling rate slow cooling of 2 ℃/s, going out stay-warm case is 610 ℃, after adopt air cooling.Gained wire rod diameter is 5.5mm, and tensile strength is average out to 1190.8MPa, and relative reduction in area is average 50%.Scanning electron microscope examination metallographic structure is mainly fine pearlite, is 87% sorbite.Heart portion does not have martensite, and every check meets the demands.
Claims (3)
1. a combing tooth bar steel wire rod, it is characterized in that, the following component that it is calculated by weight percent forms: C0.72～0.76%, Si0.15～0.25%, Mn0.70～0.80%, P≤0.018%, S≤0.015%, Cr0.20～0.40%, V0.10～0.30%, Nb0.02～0.08%, surplus is iron and inevitable impurity.
2. a production method for tooth bar steel wire rod for combing, is characterized in that, the production method of described wire rod comprises that electrosmelting, external refining, continuous small-billet casting, square billet sharpening, the high line traffic control of carrying out are successively rolled, stelmor line traffic control cooling working procedure.
3. the production method of tooth bar steel wire rod according to claim 2, is characterized in that: the method comprises the following steps:
(1), in electrosmelting operation, 1600～1620 ℃ of tapping temperatures, add silico-calcium-silicomanganese-ferrosilicon-carbon dust-ferrochrome-synthetic slag-lime and fluorite successively after tapping;
(2) in refining procedure, add silicon calcium powder or calcium carbide to carry out diffusive deoxidation in batches, fine setting molten steel chemical composition, refining basicity is controlled at 0.95～1.15, and more than keeping brown slag 25min, the refining later stage adds ferro-niobium and vanadium iron, more than controlling weak Argon 18min;
(3) during continuous casting, superheating temperature is controlled at 20～35 ℃, and pulling rate is controlled at 2.3～2.5m/min;
(4) when high speed wire rolling, start rolling temperature is 1050～1100 ℃, and laying temperature is 860～880 ℃;
(5) refrigerating work procedure adopts stelmo line cooling control technology, enters roller table speed 0.8～1.0m/s, air-cooled after weaving silk, and opens front 2 Fans, and First fan delivery is that 100%, the second Fans air quantity is 50%, realizes coolingly fast, and all the other blower fans cut out; The air-cooled cooling rate of rapid chilling section is 16～19K/s, is cooled to 650～680 ℃, then closes continuously 10 stay-warm cases, carries out slow cooling, and speed of cooling is 0.9～2.5K/s, while being cooled to 580～620 ℃, opens stay-warm case, carries out air cooling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310582207.XA CN103614637A (en) | 2013-11-18 | 2013-11-18 | Rack steel coil rod for combing and production method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310582207.XA CN103614637A (en) | 2013-11-18 | 2013-11-18 | Rack steel coil rod for combing and production method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103614637A true CN103614637A (en) | 2014-03-05 |
Family
ID=50165351
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310582207.XA Pending CN103614637A (en) | 2013-11-18 | 2013-11-18 | Rack steel coil rod for combing and production method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103614637A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104805363A (en) * | 2015-04-03 | 2015-07-29 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Phi 14 mm high-strength wire rod for manufacturing of 1*(7-21.6)/1770 MPa prestressed steel strand and production method of phi 10 mm high-strength wire rod |
| CN104805364A (en) * | 2015-04-03 | 2015-07-29 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Phi 10 mm high-strength wire rod for manufacturing of 1*(7-15.2)/1860 MPa prestressed steel strand and production method of phi 10 mm high-strength wire rod |
| CN107245657A (en) * | 2017-06-24 | 2017-10-13 | 武汉钢铁有限公司 | A kind of strong elevator wire rope steel of superelevation and production method |
| CN110238230A (en) * | 2019-04-28 | 2019-09-17 | 江苏省沙钢钢铁研究院有限公司 | A kind of production method of superhigh intensity diamond wire wire rod |
| CN112126760A (en) * | 2020-09-25 | 2020-12-25 | 攀钢集团研究院有限公司 | Preparation method of aging-free 82B hot-rolled wire rod |
-
2013
- 2013-11-18 CN CN201310582207.XA patent/CN103614637A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104805363A (en) * | 2015-04-03 | 2015-07-29 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Phi 14 mm high-strength wire rod for manufacturing of 1*(7-21.6)/1770 MPa prestressed steel strand and production method of phi 10 mm high-strength wire rod |
| CN104805364A (en) * | 2015-04-03 | 2015-07-29 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Phi 10 mm high-strength wire rod for manufacturing of 1*(7-15.2)/1860 MPa prestressed steel strand and production method of phi 10 mm high-strength wire rod |
| CN107245657A (en) * | 2017-06-24 | 2017-10-13 | 武汉钢铁有限公司 | A kind of strong elevator wire rope steel of superelevation and production method |
| CN110238230A (en) * | 2019-04-28 | 2019-09-17 | 江苏省沙钢钢铁研究院有限公司 | A kind of production method of superhigh intensity diamond wire wire rod |
| CN112126760A (en) * | 2020-09-25 | 2020-12-25 | 攀钢集团研究院有限公司 | Preparation method of aging-free 82B hot-rolled wire rod |
| CN112126760B (en) * | 2020-09-25 | 2022-05-24 | 攀钢集团研究院有限公司 | Preparation method of aging-free 82B hot-rolled wire rod |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103266287B (en) | Carbon ferritic in one-pearlite type non-hardened and tempered steel and manufacture method thereof | |
| CN101649416B (en) | High carbon steel wire rod and preparation method thereof | |
| US10023928B2 (en) | 700Mpa-level high-strength hot rolling Q and P steel and manufacturing method thereof | |
| CN104532126B (en) | A kind of super high strength hot rolled Q＆P steel of low yield strength ratio and its manufacture method | |
| CN105624564B (en) | A kind of excellent carbon steel wire rod with high of fine steel cord drawing processing characteristics and manufacture method | |
| CN104148399B (en) | For abrasion-resistant roller of mill stand and preparation method thereof in steel rolling | |
| CN107299280A (en) | 2000MPa grades of cable steel wires heat treatment wire rod and production method | |
| JP4646866B2 (en) | BEARING STEEL WIRE EXCELLENT IN DRAWING AND METHOD FOR PRODUCING THE SAME | |
| CN108220766B (en) | Cr-V hot work die steel and preparation method thereof | |
| CN106834886B (en) | Method based on ESP bar strip continuous casting and rolling flow path production thin gauge RE65Mn steel | |
| CN106011648B (en) | A kind of pinion steel and its production method | |
| CN106048415B (en) | A kind of Ni microalloyings stone oil drill collar steel and preparation method thereof | |
| CN101713046A (en) | Preparation method of superfine grain martensitic steel reinforced and controlled by nano precipitated phase | |
| CN107287489A (en) | Based on the method that titanium micro-alloyed steel is produced completely without head bar strip continuous casting and rolling flow path | |
| JP2016539243A (en) | Non-tempered steel and manufacturing method thereof | |
| CN107130172B (en) | 400HBW grades of Brinell hardness whole constrictive type high tenacity easily weld special thick wear-resisting steel plate and its manufacturing method | |
| CN110358965A (en) | 100 grades a kind of or more high-test chain wire rod and its manufacturing method | |
| CN103614637A (en) | Rack steel coil rod for combing and production method thereof | |
| CN108441765A (en) | A kind of cold-rolled transformation induced plasticity and preparation method thereof | |
| CN105002434A (en) | Hot-rolled steel for steel disc of vehicle driven plate and preparation method of hot-rolled steel | |
| CN110453153A (en) | A kind of low cost Wire Rod Steel for Curtain String Purpose and its production method | |
| CN102644021B (en) | 600MPa-level cold rolling dual-phase steel with low process sensitivity and production method | |
| CN106480373A (en) | A kind of 9.8 grades of securing members non-quenched cold heading steel wire rod and its production methods | |
| CN114934231A (en) | High-manganese low-magnetism high-strength austenitic steel and manufacturing method thereof | |
| CN106480372A (en) | A kind of 8.8 grades of securing members non-quenched cold heading steel wire rod and its production methods |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20140305 |