CN105349731A - Refining method of high-quality steel for scraped cylinder body - Google Patents
Refining method of high-quality steel for scraped cylinder body Download PDFInfo
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- CN105349731A CN105349731A CN201510896951.6A CN201510896951A CN105349731A CN 105349731 A CN105349731 A CN 105349731A CN 201510896951 A CN201510896951 A CN 201510896951A CN 105349731 A CN105349731 A CN 105349731A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention discloses a refining method of high-quality steel for a scraped cylinder body. The method comprises the technical process of electric furnace smelting, LF refining, Ca treatment and VD vacuum treatment. The requirements of the method are as follows: more than 80% of alloy is added when electric furnace steel tapping is performed, Al wires are forbidden to be fed within 15min before LF steel tapping, and before VD vacuum treatment, Ca wires are fed so as to carry out Ca treatment. By adopting the technical method, the adding quantity of LF furnace alloy is reduced, the LF refining deoxidation time and the inclusion full floating-up time are ensured, and the steel purity and the production efficiency are improved; and A, C, B, D and Ds classes of inclusions in the steel for the scraped cylinder body, produced by the technology are small in size, and the technical stability is great.
Description
Technical field
The present invention relates to the technical field of smelting of scraping cylinder body steel, be specifically related to a kind of method of refining of high-quality scraping cylinder body steel.
Background technology
In recent years, along with the change of oil cylinder processing mode, take off and become " essence pulls out+internal surface scraping+outside surface precision work " mode and produce outside former interior boring, the requirement that user pulls out the surfaces externally and internally quality of oil cylinder pipe, tolerance of dimension and purity of steel to essence is more and more higher.
This type of oil cylinder with pipe hot rolling delivery after through cold-drawing technology, and precision work is carried out to outer surface of steel tube after cold-drawn, internal surface carries out shaving action, its processing mode requires high to purity of steel, each type impurity grading all requires to be less than 1.5 grades, and after processing, steel pipe surfaces externally and internally can not occur inclusion defect.
Summary of the invention
Instant invention overcomes the deficiencies in the prior art, a kind of method of refining of high-quality scraping cylinder body steel is provided.
Consider the problems referred to above of prior art, according to an aspect disclosed by the invention, the present invention by the following technical solutions:
A method of refining for high-quality scraping cylinder body steel, described method of refining comprises the following steps:
A, electrosmelting
Add in electric furnace steel tapping process and always need 80 ~ 90% and Al of alloying element quality to carry out deoxidation of molten steel;
B, LF refining
After molten steel enters LF refining furnace, in ladle, add synthetic slag 12 ~ 20kg/t steel, after the synthetic slag added has melted, in ladle, added 0.8 ~ 2kg/t steel high efficiency deoxidiser again carry out refining, in ladle, then added quartz sand carry out residue adjustment;
Sampling analysis chemical composition after LF refining slag bleaches, joins remaining alloy in LF refining furnace simultaneously and carries out refining, mends feed Al line according to the Al content detected in refining first sample, forbids feeding Al line before the departures of LF refining furnace molten steel in 15mim;
C, Ca treatment process
Adjustment ladle bottom Argon amount before Ca process, after adjustment, feeding Ca-Si silk 0.6 ~ 0.8kg/t steel or complex Ca silk 0.12 ~ 0.15kg/t steel carry out Calcium treatment, carry out VD vacuum-treat again after Ca process;
D, VD vacuum-treat
In VD vacuum process, under vacuum tightness is less than 67Pa, keep treatment time more than 15min.
Further technical scheme: the quality that always need add alloying element in described steps A is 15 ~ 20kg/t steel.
Further technical scheme: described steps A interalloy element comprises Mn, Nb.
Further technical scheme: in described step B, high efficiency deoxidiser comprises calcium carbide, silicon carbide, ferrosilicon powder, Al powder.
The principle of technology contents of the present invention is described as follows:
The alloying element of the smelting more than 80% of general steel adds in LF refining furnace refining process.The alloying element of application claims more than 80% adds when electric furnace steel tapping, its Main Function: one is that the strong mixed of molten steel when utilizing electric furnace steel tapping rushes stirring, remove steel inclusion, two is the add-ons alleviating LF alloy, ensure deaeration time and the inclusion floating time abundant.
Forbid in 15min feeding Al line before requiring LF tapping, mainly in order to prevent because of the LF refining later stage add Al after change deoxidation equilibrium, prevent the LF refining later stage from generating the tiny Al of disperse
2o
3inclusion cannot float removal.
Before VD vacuum-treat, the effect of feeding Ca Wiring technology is the Al that Ca process makes disperse
2o
3being mingled with sex change is spherical being mingled with, and allows spherically be mingled with sufficient floating interval of floating dock, prevents nozzle clogging.Before adopting VD vacuum-treat, feeding Ca line carries out the probability that Calcium treatment can reduce the appearance of category-B in steel pipe, D class and Ds type impurity.
Forbid mending hello Al Wiring technology in the technique of VD vacuum-treat front feeding Ca line and the front 15min of LF refining furnace tapping, as far as possible its major technique reduces the tiny Al of disperse in the LF refining later stage
2o
3the formation be mingled with, make the rear Spherical Inhomogeneity formed of Ca process few, and have sufficient time aggregation to grow up, inclusion more easily floats more greatly, prevents the appearance of nozzle clogging and minimizing category-B, D class and Ds type impurity.
Compared with prior art, one of beneficial effect of the present invention is:
1, reduce LF stove alloy addition, ensure that deaeration time and inclusion floating time fully, and enhance productivity;
2, use category-B in its steel of oil cylinder steel of this explained hereafter, D class, Ds type impurity size little, quantity is few, product process for machining good stability.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
A, electrosmelting
Steel scrap, pig iron material are added in electric furnace and smelts;
Add in electric furnace steel tapping process and always need 80 ~ 90% of alloy mass to carry out alloying, add Al and carry out liquid steel pre-deoxidizing, control Al content is 0.06 ~ 0.08%, for LF refining slag making, deoxidation, desulfurization are removed to be mingled with and created conditions;
B, LF refining
After ladle enters LF refining station, in ladle, add synthetic slag 12 ~ 20kg/t steel, after the synthetic slag added has melted, then in ladle, add 0.8 ~ 2kg/t steel high efficiency deoxidiser carry out refining, then in ladle, add quartz sand residue adjustment, proceed heating;
Sampling analysis chemical composition after refining slag bleaches, and remaining alloying element is joined in LF refining furnace carry out refining, mend according to the Al content detected in refining first sample and feed Al line, ensure molten steel Al content >=0.02%, before the departures of LF refining furnace molten steel, forbid feeding Al line in 15mim;
Meanwhile, ladle is ladle bottom Argon in the process of LF refining furnace refining, and after liquid steel temperature reaches 1645 DEG C to 1665 DEG C, molten steel sets off;
C, Ca art breading
After LF refining tapping, ladle is hung in VD operation and carry out Ca process;
Meanwhile, adjustment ladle bottom argon blowing rate and Argon intensity before Ca process, when preventing Ca process, molten steel produces large boiling, secondary oxidation and air-breathing, feeds Ca-Si silk 0.6 ~ 0.8kg/t steel or complex Ca silk 0.12 ~ 0.15kg/t steel after the adjustment of ladle bottom argon gas;
D, VD vacuum-treat
VD vacuum-treat is carried out again after Ca process;
In VD vacuum process, under vacuum tightness is less than 67Pa, keep treatment time more than 15min;
After VD vacuum-treat, ladle enters continuous casting working procedure.
The quality that always need add alloy in described steps A is 15 ~ 20kg/t steel.
Described steps A interalloy element comprises Mn, Nb.
In described step B, high efficiency deoxidiser comprises calcium carbide, silicon carbide, ferrosilicon powder, Al powder.
Embodiment
A method of refining for high-quality scraping cylinder body steel, according to one embodiment of present invention, described method of refining comprises the following steps:
A, electrosmelting
Steel scrap, pig iron material are added in electric furnace and smelts;
Add in electric furnace steel tapping process and always need 80 ~ 90% and Al of alloy mass to carry out deoxidation of molten steel, preferably, the add-on of described alloy mass is 80%;
B, LF refining
After ladle enters LF refining station, synthetic slag 12 ~ 20kg/t steel is added in ladle, after the synthetic slag added has melted, in ladle, add 0.8 ~ 2kg/t steel high efficiency deoxidiser again carry out refining, then in ladle, add quartz sand carry out residue adjustment, proceed heating, preferably, the add-on of described synthetic slag is 12kg/t steel, and the add-on of described high efficiency deoxidiser is 1kg/t;
Sampling analysis chemical composition after refining slag bleaches, and remaining alloy is joined in LF refining furnace carry out refining, mend according to the Al content detected in refining first sample and feed Al line, and forbid feeding Al line in 15mim before the departures of LF refining furnace molten steel;
Meanwhile, ladle is ladle bottom Argon in the process of LF refining furnace refining, and after liquid steel temperature reaches 1645 DEG C to 1665 DEG C, molten steel sets off, and preferably, departures liquid steel temperature is 1650 DEG C;
C, Ca treatment process
After LF refining tapping, ladle is hung in VD operation and carry out Ca process;
, before Ca process, ladle bottom argon blowing rate and intensity are adjusted meanwhile, after adjustment ladle bottom argon gas, feed Ca-Si silk 0.6 ~ 0.8kg/t steel or complex Ca silk 0.12 ~ 0.15kg/t steel;
D, VD vacuum-treat
VD vacuum-treat is carried out again after Ca process;
In VD vacuum process, under vacuum tightness is less than 67Pa, keep treatment time more than 15min;
After VD vacuum-treat, ladle enters continuous casting working procedure.
The quality that always need add alloy in described steps A is 15 ~ 20kg/t steel, preferred 16kg/t steel.
Described steps A interalloy element comprises Mn, Nb.
In described step B, high efficiency deoxidiser comprises calcium carbide, silicon carbide, ferrosilicon powder, Al powder.
Do not use the oil cylinder pipe non-metallic inclusion grading situation of this explained hereafter in table 1.
Table 1
The oil cylinder pipe non-metallic inclusion grading situation using present invention process to produce is in table 2.
Table 2
From table 1 and table 2, the non-metallic inclusion fluctuation of non-invention explained hereafter is comparatively large, and inclusion size is comparatively large, and Ds reaches 3 grades; The non-metallic inclusion content that present invention process is produced is low, fluctuation is very little, and inclusion size is less, and category-A, C class are carefully 0 grade, and category-B is carefully 0.5 grade, and D class is carefully 1 grade, and A, B, C, D class is slightly be 0 grade, and Ds class is 0.5 grade.
In this specification sheets, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiment, identical similar portion cross-reference between each embodiment.
Than that described above, also it should be noted that, spoken of in this manual " embodiment ", " another embodiment ", " embodiment " etc., refer to the specific features, structure or the feature that describe in conjunction with this embodiment and be included at least one embodiment of the application's generality description.Multiple place occurs that statement of the same race is not necessarily refer to same embodiment in the description.Furthermore, when describing specific features, structure or a feature in conjunction with any embodiment, what advocate is also fall within the scope of the invention to realize this feature, structure or feature in conjunction with other embodiments.
Although with reference to multiple explanatory embodiment of the present invention, invention has been described here, but, should be appreciated that, those skilled in the art can design a lot of other amendment and embodiment, these amendments and embodiment will drop within spirit disclosed in the present application and spirit.More particularly, in the scope of and claim open in the application, multiple modification and improvement can be carried out to the building block of subject combination layout and/or layout.Except the modification of carrying out building block and/or layout is with except improvement, to those skilled in the art, other purposes also will be obvious.
Claims (4)
1. a method of refining for high-quality scraping cylinder body steel, is characterized in that: described method of refining comprises the following steps:
A, electrosmelting
Add in electric furnace steel tapping process and always need 80 ~ 90% and Al of alloying element quality to carry out deoxidation of molten steel;
B, LF refining
After molten steel enters LF refining furnace, in ladle, add synthetic slag 12 ~ 20kg/t steel, after the synthetic slag added has melted, in ladle, added 0.8 ~ 2kg/t steel high efficiency deoxidiser again carry out refining, in ladle, then added quartz sand carry out residue adjustment;
Sampling analysis chemical composition after LF refining slag bleaches, joins remaining alloy in LF refining furnace simultaneously and carries out refining, mends feed Al line according to the Al content detected in refining first sample, forbids feeding Al line before the departures of LF refining furnace molten steel in 15mim;
C, Ca treatment process
Adjustment ladle bottom Argon amount before Ca process, after adjustment, feeding Ca-Si silk 0.6 ~ 0.8kg/t steel or complex Ca silk 0.12 ~ 0.15kg/t steel carry out Calcium treatment, carry out VD vacuum-treat again after Ca process;
D, VD vacuum-treat
In VD vacuum process, under vacuum tightness is less than 67Pa, keep treatment time more than 15min.
2. the method for refining of high-quality scraping cylinder body steel according to claim 1, is characterized in that, the quality that always need add alloying element in described steps A is 15 ~ 20kg/t steel.
3. the method for refining of high-quality scraping cylinder body steel according to claim 1, is characterized in that, described steps A interalloy element comprises Mn, Nb.
4. the method for refining of high-quality scraping cylinder body steel according to claim 1, it is characterized in that, in described step B, high efficiency deoxidiser comprises calcium carbide, silicon carbide, ferrosilicon powder, Al powder.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109777917A (en) * | 2019-02-27 | 2019-05-21 | 山东钢铁股份有限公司 | The Calcium treatment Forward technique of refining furnace |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101545066A (en) * | 2009-05-12 | 2009-09-30 | 攀钢集团成都钢铁有限责任公司 | Method for smelting H2S corrosion resistant petroleum casing pipe steel 110S |
| CN102277471A (en) * | 2011-08-03 | 2011-12-14 | 攀钢集团成都钢钒有限公司 | Manufacturing method of steel |
| CN102776323A (en) * | 2012-07-30 | 2012-11-14 | 山西太钢不锈钢股份有限公司 | Smelting method of steel for hypoxia axle |
| CN102925811A (en) * | 2012-11-12 | 2013-02-13 | 莱芜钢铁集团有限公司 | Easy-cutting vanadium-feeding high-aluminum nitriding steel and preparation method thereof |
| CN103469050A (en) * | 2013-09-22 | 2013-12-25 | 中天钢铁集团有限公司 | Aluminum-containing cold forging steel smelting process |
| CN104831153A (en) * | 2015-05-20 | 2015-08-12 | 攀钢集团成都钢钒有限公司 | Preparation method of V150-steel-grade high-strength high-toughness casing steel |
-
2015
- 2015-12-07 CN CN201510896951.6A patent/CN105349731B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101545066A (en) * | 2009-05-12 | 2009-09-30 | 攀钢集团成都钢铁有限责任公司 | Method for smelting H2S corrosion resistant petroleum casing pipe steel 110S |
| CN102277471A (en) * | 2011-08-03 | 2011-12-14 | 攀钢集团成都钢钒有限公司 | Manufacturing method of steel |
| CN102776323A (en) * | 2012-07-30 | 2012-11-14 | 山西太钢不锈钢股份有限公司 | Smelting method of steel for hypoxia axle |
| CN102925811A (en) * | 2012-11-12 | 2013-02-13 | 莱芜钢铁集团有限公司 | Easy-cutting vanadium-feeding high-aluminum nitriding steel and preparation method thereof |
| CN103469050A (en) * | 2013-09-22 | 2013-12-25 | 中天钢铁集团有限公司 | Aluminum-containing cold forging steel smelting process |
| CN104831153A (en) * | 2015-05-20 | 2015-08-12 | 攀钢集团成都钢钒有限公司 | Preparation method of V150-steel-grade high-strength high-toughness casing steel |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109777917A (en) * | 2019-02-27 | 2019-05-21 | 山东钢铁股份有限公司 | The Calcium treatment Forward technique of refining furnace |
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