CN103361542A - Wheel steel smelting process - Google Patents
Wheel steel smelting process Download PDFInfo
- Publication number
- CN103361542A CN103361542A CN2013103100030A CN201310310003A CN103361542A CN 103361542 A CN103361542 A CN 103361542A CN 2013103100030 A CN2013103100030 A CN 2013103100030A CN 201310310003 A CN201310310003 A CN 201310310003A CN 103361542 A CN103361542 A CN 103361542A
- Authority
- CN
- China
- Prior art keywords
- molten steel
- argon
- steel
- refining
- wheel
- 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.)
- Granted
Links
Abstract
The invention discloses a wheel steel smelting process which comprises the following steps: smelting blast furnace molten iron with sulfur content being less than or equal to 10ppm after desulphurization processing in a converter, controlling the temperature of the smelting process in the converter to be greater than or equal to 1660 DEG C, carrying out bottom argon blowing on the molten steel during the whole course at the argon flow of 300-400m<3>/h, carrying out composite deoxidization by the use of Si-Mn alloy, tapping when the alloy content in the molten steel reaches the standard, sending the molten steel to an argon blowing station for argon blowing treatment, leaving the argon blowing station when the temperature of the molten steel is 1550-1565 DEG C, sending the molten steel to LF for refining, and adding Mn-Si-Al-Nb-Ti alloy into the molten steel, wherein the refining time of the molten steel is 70-80 min, binary basicity in slag is greater than or equal to 1.0, argon flow of a stopper rod and that of a long nozzle are respectively greater than or equal to 6L/min and 2L/min, and superheat temperature of the molten steel is 15-30 DEG C. By the adoption of the smelting process, production cost of wheel steel is reduced by 30-50%, and flexural fatigue times of a spoke and radial fatigue times of a wheel rim reach more than 10-1 million times. The wheel steel smelting process can be used to manufacture tube-type or tubeless wheels.
Description
?
Technical field
The present invention relates to a kind of smelting technology, relate in particular to the smelting technology of a kind of yield strength≤other automotive wheel steel of 500MPa level.
?
Background technology
Traditional steel automobile wheel generally adopts Tan element Jie Gou Gang ﹙ to be called for short Tan Jie Gang ﹚ and makes, and the carbon junction steel smelting technology is simple, and control requires low.In recent years, infiltration and challenge in the face of the aluminum automotive wheel, steel industry has carried out a series of innovation at automotive wheel technical, also progressively be applied to make automotive wheel such as the high-strength steel kinds such as novel material micro-alloyed steel HSLA, dual phase steel (DP) and bainitic steel, residual austenite steel (TRIP) and twinning-induced plasticity steel (TWIP) develop, created condition for alleviating automotive wheel matter (weight) amount with more bold style design.
Along with the application of novel material, also more and more higher to the requirement of making molten steel (liquid) purity that automotive wheel uses.And the smelting technology (method) of traditional structural carbon steel Wheel Steel for the manufacture of automotive wheel is not controlled requirement to inclusion content in melting steel, cause condemnation factor height and times of fatigue in the wheel moulding process low, other most domestic automobile (especially lorry) overloading (problem) especially obviously (seriously), therefore adopt (automobile) wheel inefficacy of the carbon junction steel manufacturing of hanging down fatigue lifetime very fast, affect the safe operation (use) of automobile.
For novel automotive wheel steel not only demanding mechanical property (intensity) and formability, but also demanding fatigue property, good reaming performance and good welding property, therefore for this weight bearing part of wheel, need the inclusion in the strict control Wheel Steel, to guarantee the safety traffic of wheel.
?
Summary of the invention
The object of the present invention is to provide a kind of reduction smelting cost, alleviate car body heavy (matter) amount and through control wheel steel inclusion to solve the not smelting technology of the Wheel Steel of good problem of the poor and fatigue property of Wheel Steel moulding process.
For achieving the above object, the technical solution used in the present invention is: the smelting technology of described a kind of Wheel Steel refers to that blast furnace ironmaking water is carried out first desulfurization to be processed, make S≤10ppm in the molten iron, the oxygen top bottom blowing converter that molten iron after the desulfurization is entered 100～200t is smelted, control converter steelmaking process temperature 〉=1660 ℃, adopt silicon, manganese alloy that molten steel is carried out complex deoxidization, omnidistance BOTTOM ARGON BLOWING, argon flow amount is 300～400m3/h.As smelting molten steel Cheng Fen ﹙ wt% ﹚: tapping when [C]≤0.06, [Mn]≤0.10, [P]≤0.019, [S]≤0.005, tapping temperature is controlled at 1660 ℃～1700 ℃, and the lower quantity of slag≤5kg/t of control keeps remaining oxygen amount 〉=100ppm in the stove after the tapping.
Sending the Argon station that molten steel is carried out Argon ladle processes, 1550 ℃～1565 ℃ of the tapping temperatures at control Argon station, the Cheng Fen ﹙ wt% ﹚ of control molten steel after Argon is processed: [C]≤0.08, [Si]≤0.15, [Mn]≤1.00, [P]≤0.018, [S]≤0.008.
Send the molten steel after processing through Argon refining station to carry out refining, in molten steel, add manganese, silicon, aluminium, niobium, titanium alloy, make the Gang Shui Cheng Fen ﹙ wt% ﹚ after the refining: [C]≤0.12, [Si]≤0.30, [Mn]≤1.60, [P]≤0.022, [Als]=0.02～0.06, [S]≤0.008, [Ti]≤0.030, [Nb]≤0.030, [N]≤0.0070, dual alkalinity in the control slag is more than or equal to 1.0, and molten steel is 70～80min at the refining time of refining station.
Continuous casting process adopts the argon shield casting, and the stopper argon flow amount is more than or equal to 6L/min, and the long nozzle argon flow amount is more than or equal to 2L/min, and molten steel overheat is controlled at 15 ℃～30 ℃.
Adopt the smelting technology of a kind of Wheel Steel that as above technical scheme provides compared with prior art, technique effect is:
1. compare with the carbon junction steel wheel, production cost reduces by 30～50%.
2. the single particle that has reduced among the Gang Shui ﹙ Ye ﹚ is mingled with greatly, allows the tiny and diffuse type of inclusion be distributed in the molten steel.
3. use the flexural fatigue number of times of the spoke that the low steel of inclusion make to reach 10 * 10
4--
More than inferior, the radially times of fatigue of wheel rim reaches 100 * 10
4-----
Above, can be used for the use with the inner tube of a tyre and steel wheel for tubeless tires.
?
Embodiment
The below is described in further detail the specific embodiment of the present invention.
The smelting technology of described a kind of Wheel Steel comprises KR desulfurization, converter smelting, LF refining and continuous casting process.
For obtaining the automotive wheel steel of high strength (such as yield strength≤500MPa, unit elongation 〉=24%), the present invention adopts little Nb+Ti alloy prior route, and the Cheng Fen ﹙ that requires each element in the described Wheel Steel (being alloy) is the quality Han Liang ﹚ Wei ﹙ wt% ﹚ of each element: C≤0.12, Si≤0.20, Mn≤1.60, P≤0.025, S≤0.010, Al=0.020～0.060, Nb≤0.030, Ti≤0.030, O≤0.0008, N≤0.007.
Wherein the carbon in the steel (C) element can significantly improve the tensile strength of steel, but for guaranteeing formability and the welding property of steel, needing the control carbon content is≤0.12%.Because of welding property and the processability of the too high steel of carbon content poor, and the crack easily appears in continuously cast bloom, for reducing carbon content and guaranteeing steel strength, adopt the composite micro-alloyed metallization processes (namely in molten steel, adding Fe-Nb and Fe-Ti alloy) of Nb+Ti, wherein niobium (Nb) can play the refined crystalline strengthening effect, and titanium (Ti) can play the precipitation strength effect.
Sulphur in the steel (S) content requirement≤0.010%(is as getting S=0.008%), too high processability and the reaming ability that can affect steel of sulphur content, and also control sulphur (S) content also is an important factor of high fatigue life a lower scope.
The reason that aluminium content in the steel is controlled between 0.020～0.060% is: aluminium (Al ﹚ too high levels except increasing steel product cost, aluminium also can be in the liquid steel refining process slowly oxidation produce Al
---2
O
3
Be mingled with, finally also can cause molten steel mouth of a river in casting cycle blocked, more can cause the category-B inclusion in the molten steel to exceed standard, affect the processability of steel and welding property etc.
In the steel (or in strand) require Control for Oxygen Content below the 8ppm and nitrogen be controlled at below the 70ppm, too high oxygen level can cause inclusion content in melting steel to exceed standard and the Wheel Steel fatigue property reduces, and the too high meeting of nitrogen content causes forming the liquation carbonitride, can seriously undermine the fatigue performance of wheel.
Carry out desulfurization pre-treatment (being the KR desulfurization) to blast-melted, make in the molten iron sulphur content≤10ppm ﹙ is S≤10ppm ﹚, molten iron after the dark desulfurization is poured in the oxygen top bottom blowing converter of 100～200t and smelted, guarantee the converting process temperature of converter 〉=1660 ℃.
Adopt silicon, manganese alloy that molten steel is carried out complex deoxidization, namely in converter steelmaking process, in molten steel, add Fe-Mn alloy and Fe-Si alloy.Adopt omnidistance BOTTOM ARGON BLOWING (Ar) in refining process, control argon bottom-blowing flow is that 300～400m3/h ﹙ the best is 360m3/h ﹚.
When smelting molten steel composition (wt%) [C]≤0.06, [Mn]≤0.10, tapping when [P]≤0.019 reaches [S]≤0.005, tapping temperature is controlled at 1660 ℃～1700 ℃, the lower quantity of slag of control less than or equal to 5kg/t(wherein t be molten steel per ton), keep remaining oxygen amount 〉=100ppm in the tapping relief stove.
Send Argon (Ar) to stand ladle molten steel is carried out the Argon processing, control Argon station tapping temperature may cause molten steel in refining furnace long nitrogen pick-up heat-up time 1550 ℃～1565 ℃ scopes for preventing that temperature is crossed to hang down when molten steel advances refining furnace.The composition (wt%) of control molten steel after Argon is processed: [C]≤0.08, [Si]≤0.15, [Mn]≤1.00, [P]≤0.018 and [S]≤0.008 ﹙ are the sulphur content of molten steel when setting off from the Argon station≤80ppm ﹚.
Send the molten steel after Argon is processed refining furnace (being LF) to carry out refining, molten steel in refining process not calcium process (be in the molten steel not calcic), not soft blow, not desulfurization, avoid heating for multiple times and stirring.The molten steel composition (wt%) of control after refining: [C]≤0.12, [Si]≤0.30, [Mn]≤1.60, [P]≤0.022 [Als]=0.02～0.06, [S]≤0.008, [Ti]≤0. 030, [Nb]≤0.030, [N]≤0.0070, dual alkalinity R(C/A in the control slag) 〉=1.0(also can be expressed as R=CaO/Al
2
O
3
〉=1.0).Whole refining time is controlled at 70～80min, reduces Al in the refining process
2
O
3
The formation that is mingled with.The main purpose of liquid steel refining (being whole operation) is: 1. grow up for the mutual Collision coagulation that reduces inclusion, allow tiny being distributed in the molten steel of inclusion, 2. reduce the circulating contact of molten steel and furnace lining, avoid attracting the outer inclusion of oarse-grained stove.
The continuously cast bloom that is become required section through the molten steel after the refining by the continuous caster continuous casting; continuous casting process adopts the argon shield casting; control stopper argon flow amount 〉=6L/min and long nozzle argon flow amount 〉=2L/min; the pattern of gently depressing adopts velocity mode; forbid the steel liquid fluctuating; stable control speed, molten steel overheat is controlled at 15 ℃～30 ℃.
Claims (1)
1. the smelting technology of a Wheel Steel, it is characterized in that: blast furnace ironmaking water is carried out desulfurization process, make S≤10ppm in the molten iron, the oxygen top bottom blowing converter that molten iron after processing through desulfurization is entered 100～200t is smelted, control converter steelmaking process temperature 〉=1660 ℃, adopt silicon, manganese alloy that molten steel is carried out complex deoxidization, omnidistance BOTTOM ARGON BLOWING, argon flow amount is 300～400m3/h; Tapping when smelting molten steel composition [C]≤0.06%, [Mn]≤0.10%, [P]≤0.019%, [S]≤0.005%, tapping temperature is controlled at 1660 ℃～1700 ℃, and the lower quantity of slag≤5kg/t of control keeps remaining oxygen amount 〉=100ppm in the stove after the tapping;
Sending the Argon station that molten steel is carried out Argon ladle processes, 1550 ℃～1565 ℃ of the tapping temperatures at control Argon station, the composition of control molten steel after Argon is processed: [C]≤0.08%, [Si]≤0.15%, [Mn]≤1.0%, [P]≤0.018%, [S]≤0.008%;
Send the molten steel after processing through Argon refining station to carry out refining, in molten steel, add manganese, silicon, aluminium, niobium, titanium alloy, make molten steel composition [C]≤0.12%, [Si]≤0.30%, [Mn]≤1.60%, [P]≤0.022%, [Als]=0.02～0.06%, [S]≤0.008%, [Ti]≤0.030%, [Nb]≤0.030%, [N]≤0.0070% after the refining, dual alkalinity is more than or equal to 1.0 in the control slag, and molten steel is 70～80min at the refining time of refining station;
Continuous casting process adopts the argon shield casting, and the stopper argon flow amount is more than or equal to 6L/min, and the long nozzle argon flow amount is more than or equal to 2L/min, and molten steel overheat is 15 ℃～30 ℃;
Described t is molten steel per ton, and the value of [C], [Si], [Mn], [P], [S], [Als], [Nb], [Ti], [N] is carbon, silicon, manganese, phosphorus, sulphur, aluminium, niobium, titanium and the nitrogen quality percentage composition in molten steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310310003.0A CN103361542B (en) | 2013-07-23 | 2013-07-23 | Wheel steel smelting process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310310003.0A CN103361542B (en) | 2013-07-23 | 2013-07-23 | Wheel steel smelting process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103361542A true CN103361542A (en) | 2013-10-23 |
| CN103361542B CN103361542B (en) | 2015-03-25 |
Family
ID=49363788
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310310003.0A Active CN103361542B (en) | 2013-07-23 | 2013-07-23 | Wheel steel smelting process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103361542B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104004883A (en) * | 2014-06-12 | 2014-08-27 | 鞍钢股份有限公司 | Molten steel sulphur content accurate control method for LF |
| CN104862449A (en) * | 2015-06-10 | 2015-08-26 | 武汉钢铁(集团)公司 | Control method of nitrogen in steel for saw web substrate |
| CN105463150A (en) * | 2015-12-18 | 2016-04-06 | 中天钢铁集团有限公司 | Steel smelting process used for automobile hub bearing |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101219434A (en) * | 2008-01-25 | 2008-07-16 | 广州珠江钢铁有限责任公司 | Method for producing steel for automobile wheel based on bar strip continuous casting and rolling flow path |
| CN101245434A (en) * | 2007-12-18 | 2008-08-20 | 本钢板材股份有限公司 | Vehicle wheel steel and smelting method |
| CN101280389A (en) * | 2008-05-20 | 2008-10-08 | 莱芜钢铁股份有限公司 | Steel belt for spoke of vehicle wheel and manufacturing method thereof |
| CN102127706A (en) * | 2010-12-30 | 2011-07-20 | 首钢总公司 | High-strength long-fatigue life wheel steel used for heavy truck and manufacturing method thereof |
| CN102400042A (en) * | 2011-11-10 | 2012-04-04 | 攀钢集团研究院有限公司 | High strength hot-rolled steel plate and manufacture method thereof |
-
2013
- 2013-07-23 CN CN201310310003.0A patent/CN103361542B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101245434A (en) * | 2007-12-18 | 2008-08-20 | 本钢板材股份有限公司 | Vehicle wheel steel and smelting method |
| CN101219434A (en) * | 2008-01-25 | 2008-07-16 | 广州珠江钢铁有限责任公司 | Method for producing steel for automobile wheel based on bar strip continuous casting and rolling flow path |
| CN101280389A (en) * | 2008-05-20 | 2008-10-08 | 莱芜钢铁股份有限公司 | Steel belt for spoke of vehicle wheel and manufacturing method thereof |
| CN102127706A (en) * | 2010-12-30 | 2011-07-20 | 首钢总公司 | High-strength long-fatigue life wheel steel used for heavy truck and manufacturing method thereof |
| CN102400042A (en) * | 2011-11-10 | 2012-04-04 | 攀钢集团研究院有限公司 | High strength hot-rolled steel plate and manufacture method thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104004883A (en) * | 2014-06-12 | 2014-08-27 | 鞍钢股份有限公司 | Molten steel sulphur content accurate control method for LF |
| CN104862449A (en) * | 2015-06-10 | 2015-08-26 | 武汉钢铁(集团)公司 | Control method of nitrogen in steel for saw web substrate |
| CN105463150A (en) * | 2015-12-18 | 2016-04-06 | 中天钢铁集团有限公司 | Steel smelting process used for automobile hub bearing |
| CN105463150B (en) * | 2015-12-18 | 2017-05-31 | 中天钢铁集团有限公司 | A kind of automobile hub bearing steel smelting technique |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103361542B (en) | 2015-03-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101550475B (en) | Method for producing ultra-low-carbon steel | |
| CN106834960B (en) | A kind of automobile using boracic top grade gear steel and its production technology | |
| CN110229992B (en) | Smelting production method of titanium microalloyed low-cost Q355B steel plate | |
| CN101363068B (en) | Smelting method of low-phosphorus steel | |
| CN104451385B (en) | A kind of low-carbon (LC), low nitrogen, hyperoxia ingot iron and its production method | |
| CN109055649B (en) | Preparation method for extracting carbon and preserving manganese by converter smelting high-manganese high-silicon high-phosphorus iron water | |
| CN102994871B (en) | Method for smelting medium/high-carbon hard-wired steel by vanadium-titanium containing molten iron | |
| CN103215410B (en) | A kind of method improved containing Nb, Ti steel cleanness | |
| CN104498662B (en) | A kind of deep-draw is pulled out by the control method of high-carbon steel wire rod field trash | |
| CN103642970A (en) | Smelting method of low-carbon aluminum killed steel | |
| CN104611502A (en) | Aluminum-containing and sulfur-containing series gear steel smelting process | |
| CN108893682B (en) | Die steel billet and preparation method thereof | |
| CN101603146B (en) | Automobile spoke steel and smelting process | |
| CN106636560A (en) | Production method of heavy rail steel for guard rail | |
| CN102851433A (en) | Method for controlling content of nitrogen in semi-steel smelted tire cord steel or hard wire steel | |
| CN105483501A (en) | Method for smelting phosphorus-containing ultra-low carbon steel | |
| CN104087711A (en) | Method for improving purity of molten steel and carbon alloy steel ingot | |
| CN114032354A (en) | Smelting process for improving low-temperature impact energy of 32CrNi3MoVE steel | |
| CN104120352A (en) | 34CrMo4 gas cylinder steel and production method thereof | |
| CN103361542B (en) | Wheel steel smelting process | |
| CN107916319B (en) | Refining method of LF furnace in container steel production of CSP production line | |
| CN107502704B (en) | Method for reducing alumina inclusions in semisteel steelmaking casting blank | |
| CN113388710A (en) | Smelting control method of ultrahigh-strength cord steel | |
| CN102766729B (en) | Low phosphor control method for high-speed axle steel | |
| CN111455131A (en) | Smelting and continuous casting method of high-cleanliness wear-resistant steel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |