CN100532615C - Vehicle wheel steel smelting method - Google Patents
Vehicle wheel steel smelting method Download PDFInfo
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- CN100532615C CN100532615C CNB2007101589653A CN200710158965A CN100532615C CN 100532615 C CN100532615 C CN 100532615C CN B2007101589653 A CNB2007101589653 A CN B2007101589653A CN 200710158965 A CN200710158965 A CN 200710158965A CN 100532615 C CN100532615 C CN 100532615C
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Abstract
The invention relates to a wheel steel and a smelting method thereof. The wheel steel comprises elements of carbon, silicon, manganese, niobium, phosphor, oxygen, sulfur and iron, etc. By adopting the steps of hot metal pretreatment, converter smelting, refining outside the converter and conventional rolling, the wheel steel is smelted. The components of the alloy are controlled by means of micro alloying and calcium treatment, etc. The indexes of the yield strength, the tensile strength and the bending fatigue life of the wheel made from the wheel steel are all higher than that of the existing wheel steel, furthermore, the wheel steel can be further thinned; therefore, cars adopting the wheel made from the wheel steel can achieve energy saving.
Description
Technical field:
The present invention relates to a kind of smelting process of Wheel Steel.
Background technology:
The deadweight of motor vehicle is directly proportional with its oil consumption, and promptly the heavy more oil consumption of motor vehicle is big more, alleviates the car body quality and be one of the energy-conservation the most effective means that realize.Wheel is the parts of carrying whole locomotive body, and wheel also should have the feature of light weight when guaranteeing enough supporting capacitys, to be satisfied with energy-conservation needs.In the prior art, the material that is used to make wheel comprises aluminium, magnesium, plastics and steel plate etc., is called " a kind of magnesium alloy vehicle wheel hub and manufacture method thereof " as No. 1884599 disclosed names of Chinese patent and just provides an object lesson that utilizes magnesium alloy to make wheel hub.Though the relative steel plate of magnesium alloy quality is lighter,, the cost height of MAGNESIUM METAL self is several times of steel plate with the wheel hub of its making, and raw material sources do not have steel extensive yet, so the magnesium alloy hub is not generally adopted.Make wheel with aluminium alloy and have cost problem too.Though the plastics price is lower, its insufficient strength, prior art also do not have to find to substitute the plastics of iron and steel, so, await further to develop with the plastic production wheel.
Steel plate is the relatively low starting material of aboundresources and price, the wheel of making of steel plate can guarantee supporting capacity, but, because the content of the carbon in the existing steel plate, silicon, manganese, phosphorus, these five kinds of elements of sulphur can not get controlling effectively in smelting, cause the wheel of making of steel plate thicker, quality increases.For this reason, the name of Chinese patent 101033521A number bulletin is called " a kind of steel plate and production method that is used to make automobile brake sheet " and proposes a kind of new steel grade.The chemical ingredients of this kind steel is C:0.24-0.30%; Si:0.17-0.35%; Mn:0.50-0.95%; 0.005-0.05%; P≤0.025%; S≤0.018; Als:0.010-0.030%, surplus is an iron.Provide simultaneously, this kind steel is made Finished Steel by steps such as blast furnace ironmaking, converter steelmaking, the refining of LF stove, sheet blank continuous casting, the heating of progressive formula process furnace, roughing, hot rolling song, finish rolling.Carbon content is very big to the quality influence of steel in the steel, the reduction of carbon content can improve the ductility of steel plate, and it is on a declining curve that the yield strength of steel and tensile strength also are meeting simultaneously, and the increase of carbon content, the stability of steel is also descending, and finally has influence on the lumber recovery of Wheel Steel; In addition, whether the content of the content of other element such as silicon, manganese, nitrogen, sulphur accords with the requirement of Wheel Steel also among further inquiring into.Along with basic role and the secondary action of micro alloying element in steel, the notion of " austenite adjusting " has been proposed, control adds micro alloying element consciously, to develop the better steel grade of new performance.As niobium energy crystal grain thinning, steel NbC strain inducing in course of hot rolling is folded hinder the austenitic answer of deformation, recrystallize, with the obdurability of raising steel, but up to the present, aspect Wheel Steel, also there is not to find to contain the technology enlightenment of niobium.
Summary of the invention:
Task of the present invention provides the method that a kind of technology of utilizing calcium to handle and control effectively alloying constituent etc. is smelted Wheel Steel.
Wheel Steel proposed by the invention comprises the material of following weight percent: carbon 0.09-0.12%; Silicon 0.10-0.15%; Manganese 0.85-1.00%; Niobium 0.005-0.05%; Phosphorus≤0.012%; Oxygen≤0.005%, sulphur≤0.012; Surplus is iron and unavoidable impurities.Wherein, niobium energy crystal grain thinning promotes acicular ferrite to form, if the content of niobium is unfavorable for that less than 0.005% acicular ferrite forms, and its content is higher than the direct welding property that influence Wheel Steel of 0.05% meeting; Manganese has the intensity of raising, toughness in pipe line steel, reduce the effect of ductile-brittle transition temperature; The performance that how much can determine steel of carbon content, carbon among the present invention only between 0.09-0.12%, makes this steel have good ductility, and adds yield strength and tensile strength that niobium and manganese can improve steel in the steel, and the reduction of carbon content can increase the stability of steel.
The method of the above-mentioned Wheel Steel of smelting proposed by the invention may further comprise the steps:
Hot metal pretreatment: in the hot metal pretreatment device, add sweetening agent, when the weight content of sulphur in the molten iron≤0.004%, change it over to converter smelting;
Converter smelting: the winding-up of the molten iron after desulfurization oxygen is smelted, and adopted lime and light dolomite slag making, its oxygen blow duration is 14 minutes-18 minutes, and tapping temperature remains between 1670 ℃-1690 ℃;
External refining: will the molten steel behind converter smelting sending into ladle refining furnace is in the LF stove, and the alloy content in the molten steel adds niobium, manganese, silicon and adjusts steel interalloy content in this ladle refining furnace on the estimation, add reductor simultaneously, the oxygen of jetting in it from the top of ladle refining furnace then, to winding-up argon gas or nitrogen, treat the molten steel alloying from the bottom after pair rolling is Wheel Steel.
Described sweetening agent is to be made of magnesium powder and lime powder, and the weight ratio between magnesium powder and the lime powder is 1:2.5-3.5.
In the described converter smelting tapping step, quantity of slag is that steel per ton is less than or equal to 5 kilograms of slags under it.
The reductor that the reductor that is added in the described external refining step adopts sial barium strontium calcium matrix material to constitute, its add-on is that every stove steel (150 tons of steel) adds the 350-450 kilogram.
In the described external refining step, molten steel in the stove top slag remains between the 30mm-50mm.
The thick spoke of the 11.5mm that makes of Wheel Steel proposed by the invention after testing, its yield strength is at 470Mpa, tensile strength is at 570Mpa, and minimum with the wheel stand flexible life of this Wheel Steel production be 18.2 ten thousand times, the performance of these these Wheel Steels of data declaration is considerably beyond the performance of existing Wheel Steel, and the space that also has further attenuate is so the wheel that automobile uses this Wheel Steel to produce can be energy-conservation.
Embodiment:
Embodiment 1:
At first the molten iron in the hot metal pretreatment device being carried out desulfurization handles, promptly add the sweetening agent that constitutes by magnesium powder and lime powder toward molten iron, weight ratio between magnesium powder and the lime powder is 1:3, detect through routine, pretreatment process is finished when the weight content of sulphur in the molten iron≤0.004%, and will change in the converter through pretreated molten iron and smelt; In the operation of converter smelting, add lime and light dolomite slag making in converter, 14 minutes oxygen of the winding-up of the molten iron after desulfurization is tapped after oxygen operation to be painted is finished then, tapping temperature remains on 1670 ℃, and quantity of slag is that steel per ton is less than or equal to 5 kilograms of slags under it; Molten steel being sent into ladle refining furnace is in the LF stove again, and the alloy content in the molten steel adds niobium, manganese, silicon and adjusts steel interalloy content in this ladle refining furnace on the estimation, add reductor simultaneously, reductor adopts sial barium strontium calcium matrix material, its add-on is that every stove steel (150 tons of steel) adds 450 kilograms, molten steel in the stove top slag remains on 30mm, the employing oxygen of in it, jetting from the top of ladle refining furnace, jet in it from the bottom mode refining of argon gas or nitrogen is treated the molten steel alloying after pair rolling is Wheel Steel.This Wheel Steel comprises the material of following weight percent: carbon 0.09%; Silicon 0.10%; Manganese 0.85%; Niobium 0.005%; Phosphorus≤0.012%; Oxygen≤0.005%, sulphur≤0.012%; Surplus is iron and unavoidable impurities.
Embodiment 2:
Method according to embodiment 1 adopts the step of hot metal pretreatment, converter smelting, external refining to smelt Wheel Steel, and different is: in the operation of converter smelting, and 18 minutes the oxygen of molten iron winding-up after desulfurization, tapping temperature keeps 1690 ℃; Added sial barium strontium Ca deoxidizer is that every stove steel (150 tons of steel) adds 350 kilograms in LF stove refining procedure, and molten steel in the stove top slag remains on 50mm.This Wheel Steel comprises the material of following weight percent: carbon 0.12%; Silicon 0.15%; Manganese 1.00%; Niobium 0.05%; Phosphorus≤0.012%; Oxygen≤0.005%, sulphur≤0.012%; Surplus is iron and unavoidable impurities.
Embodiment 3:
Method according to embodiment 1 adopts the step of hot metal pretreatment, converter smelting, external refining to smelt Wheel Steel, and different is: in the operation of converter smelting, and the 17 minutes 45 seconds oxygen of molten iron winding-up after desulfurization, tapping temperature keeps 1675 ℃; Added sial barium strontium Ca deoxidizer is that every stove steel (150 tons of steel) adds 400 kilograms in LF stove refining procedure, and molten steel in the stove top slag remains on 40mm.This Wheel Steel comprises the material of following weight percent: carbon 0.12%; Silicon 0.15%; Manganese 1.00%; Niobium 0.05%; Phosphorus≤0.012%; Oxygen≤0.005%, sulphur≤0.012%; Surplus is iron and unavoidable impurities.
Claims (5)
1, a kind of smelting process of Wheel Steel, this Wheel Steel comprises the material of following weight percent: carbon 0.09-0.12%; Silicon 0.10-0.15%; Manganese 0.85-1.00%; Niobium 0.005-0.05%; Phosphorus≤0.012%; Oxygen≤0.005%, sulphur≤0.012%; Surplus is iron and unavoidable impurities, it is characterized in that, the smelting process of this Wheel Steel may further comprise the steps:
Hot metal pretreatment: in the hot metal pretreatment device, add sweetening agent, when the weight content of sulphur in the molten iron≤0.004%, change it over to converter smelting;
Converter smelting: the winding-up of the molten iron after desulfurization oxygen is smelted, and adopted lime and light dolomite slag making, its oxygen blow duration is 14 minutes-18 minutes, and tapping temperature remains between 1670 ℃-1690 ℃;
External refining: will the molten steel behind converter smelting sending into ladle refining furnace is in the LF stove, and the alloy content in the molten steel adds niobium, manganese, silicon and adjusts steel interalloy content in this ladle refining furnace on the estimation, add reductor simultaneously, the oxygen of jetting in it from the top of ladle refining furnace then, jet in it from the bottom argon gas or nitrogen are treated the molten steel alloying after pair rolling is Wheel Steel.
2, method according to claim 1 is characterized in that: described sweetening agent is to be made of magnesium powder and lime powder, and the weight ratio between magnesium powder and the lime powder is 1:2.5-3.5.
3, method according to claim 1 is characterized in that: in the described converter smelting tapping step, quantity of slag is that steel per ton is less than or equal to 5 kilograms of slags under it.
4, method according to claim 1 is characterized in that: the reductor that the reductor that is added in the described external refining step adopts sial barium strontium calcium matrix material to constitute, its add-on is that 150 tons of steel/every stove adds the 350-450 kilogram.
5, method according to claim 1 is characterized in that: in the described external refining step, molten steel in the stove top slag remains between the 30mm-50mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101589653A CN100532615C (en) | 2007-12-18 | 2007-12-18 | Vehicle wheel steel smelting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101589653A CN100532615C (en) | 2007-12-18 | 2007-12-18 | Vehicle wheel steel smelting method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101245434A CN101245434A (en) | 2008-08-20 |
| CN100532615C true CN100532615C (en) | 2009-08-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2007101589653A Expired - Fee Related CN100532615C (en) | 2007-12-18 | 2007-12-18 | Vehicle wheel steel smelting method |
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| CN (1) | CN100532615C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102719750A (en) * | 2012-04-24 | 2012-10-10 | 本钢板材股份有限公司 | Wear resistant steel and smelting method thereof |
| CN103361542B (en) * | 2013-07-23 | 2015-03-25 | 湖南华菱涟源钢铁有限公司 | Wheel steel smelting process |
| CN104032215B (en) * | 2014-05-30 | 2016-08-17 | 武汉钢铁(集团)公司 | 420MPa level steel for automobile wheel and production method thereof |
| CN108973512A (en) * | 2018-07-03 | 2018-12-11 | 马鞍山市天钧机械制造有限公司 | A kind of integral type operating condition solid wheel and its preparation process |
| CN111187991A (en) * | 2020-02-17 | 2020-05-22 | 本钢板材股份有限公司 | Special steel for automobile transmission shaft tube and preparation method thereof |
| CN115595502A (en) * | 2022-10-10 | 2023-01-13 | 本钢板材股份有限公司（Cn） | Low-cost high strength wheel is used Hot-rolled pickled plate and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1056535A (en) * | 1990-05-15 | 1991-11-27 | 鞍山钢铁公司 | A kind of steel material for rolling wheel of automobile |
| CN1074712A (en) * | 1991-12-24 | 1993-07-28 | 川崎制铁株式会社 | The method of refining of high purity steel |
| CN1611625A (en) * | 2003-09-30 | 2005-05-04 | 现代自动车株式会社 | Cr-Mo alloy steel for change gear |
| CN101033521A (en) * | 2007-04-19 | 2007-09-12 | 唐山钢铁股份有限公司 | Steel plate for producing automobile brake block and producing method |
-
2007
- 2007-12-18 CN CNB2007101589653A patent/CN100532615C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1056535A (en) * | 1990-05-15 | 1991-11-27 | 鞍山钢铁公司 | A kind of steel material for rolling wheel of automobile |
| CN1074712A (en) * | 1991-12-24 | 1993-07-28 | 川崎制铁株式会社 | The method of refining of high purity steel |
| CN1611625A (en) * | 2003-09-30 | 2005-05-04 | 现代自动车株式会社 | Cr-Mo alloy steel for change gear |
| CN101033521A (en) * | 2007-04-19 | 2007-09-12 | 唐山钢铁股份有限公司 | Steel plate for producing automobile brake block and producing method |
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| CN101245434A (en) | 2008-08-20 |
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Granted publication date: 20090826 Termination date: 20171218 |