CN100478124C - Technique for producing 55CrSi bull rod steel - Google Patents
Technique for producing 55CrSi bull rod steel Download PDFInfo
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- CN100478124C CN100478124C CNB2004100853405A CN200410085340A CN100478124C CN 100478124 C CN100478124 C CN 100478124C CN B2004100853405 A CNB2004100853405 A CN B2004100853405A CN 200410085340 A CN200410085340 A CN 200410085340A CN 100478124 C CN100478124 C CN 100478124C
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- 55crsi
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- wire rod
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
A technology for producing coiled 55CrSi steel rod includes such steps as preparing raw materials, smelting in electric furnace, refining outside furnace, vacuum degassing, conticasting, rolling and coiling. Its advantages are simple process, low energy consumption and high productivity and quality of product.
Description
Technical field
The invention belongs to the refining of metal technical field, particularly relate to a kind of 55CrSi wire rod steel production technology.
Background technology
In the prior art, the 55CrSi wire rod steel is a quality material of making automotive suspension spring, its quality and performance also can be used as the making raw material that requires high engine cylinder valve spring, usually employing is got the raw materials ready, the production method of converter smelting, external refining, vacuum outgas, die casting, blooming mill cogging, high speed wire rolling and wire rod obtains this product greatly, produce blank owing to take die casting, need to reheat blank in the subsequent handling,, belong to two pyrogene materials by the blooming mill cogging; And cogging need reheat, and then consumed energy is bigger; Cogging simultaneously needs certain production time, thereby has extended the production cycle; Owing to metal consumption is in various degree arranged during cogging,, has increased production cost so reduced finished product rate.
Summary of the invention
The object of the present invention is to provide that a kind of technology is simple, energy consumption is low, the 55CrSi wire rod steel production technology of low equipment investment, production efficiency height, good product quality.
The present invention seeks to adopt such process to realize:
55CrSi wire rod steel production technology is characterized in that comprising following operation: get the raw materials ready, the AF electric furnace smelting) LF external refining, VD vacuum outgas, CCM continuous casting, high speed wire rolling and wire rod.
Procedure for preparation is that material is prepared before the steel-making, and it comprises the content of three aspects: the one, increase the ratio of the pig iron in feed stock for blast furnace, and the harmful residual elements total amount of control is in 0.25%; Next is to determine that every stove steel configuration hot metal ratio is 30～40%; The 3rd, keep all steel-making raw material drying, alloy is gone into the bag baking;
EAF electric furnace smelting operation is to make the preceding carbon content of tapping 〉=0.20%, tapping back carbon content 〉=0.30%; Make water-cooled carbon oxygen lance spray carbon amount 〉=6kg/T; Nitrogen content is controlled at below the 80ppm; Carbon content before the tapping 〉=0.20%, tapping back carbon content 〉=0.30%; Do not add and contain aluminium deoxidizer, adopt no aluminium to hang down S, P ferrochrome, ferromanganese, ferrosilicon; Tapping temperature is controlled at 1600～1660 ℃.
LF external refining operation: refining time is 30～60 minutes, adjusts chemical composition with no aluminium alloy, and soft mixing time was greater than 3 minutes, and to promote to be mingled with come-up, refining every stove molten steel in latter stage is fed 200～400 meters on CaSi line, and tapping temperature is controlled at 1610～1650 ℃.
VD vacuum outgas operation: adopt carbon deoxidation under the vacuum, be not less than 10 minutes in the following retention time of condition of high vacuum degree, the control hydrogen content is not more than 2ppm, and tapping temperature is controlled at 1520～1560 ℃.
CCM continuous casting working procedure content: the continuous casting section is set to 150mm * 150mm; Implement total process protective casting; Open the crystallizer electromagnetic agitation; The target degree of superheat is less than 30 ℃, and is weak cold; Connect and to water the stove number less than 7 stoves, one waters in time last stove the Bao Liugang amount more than 10 tons; Pulling rate is 1.8～3.0m/min.
High speed wire rolling operation: continuous casting billet is carried out total ball blast,, defective continuous casting billet is carried out reconditioning handle by propping up by the face check; Single stove is rolling, must not organize and criticize; Start rolling temperature is 950～1050 ℃; Pre-final rolling temperature is 910～930 ℃; Subtracting the sizing temperature is 830～880 ℃; Laying temperature is 850～880 ℃; The stelmor travelling speed is 16～20m/min; Stay-warm case 1A～3A opens; Blower fan leaves 30～60% 1～No. 2, and all the other are closed.
Wire rod: be the finished product that the 55CrSi bar steel that the high speed wire rolling operation is obtained is turned to plate-like.
The present invention compared with prior art owing to adopt the continuous casting manufacturing technique blank to need not to reheat cogging, belongs to one-heating forming, save the cogging operation, shortened the production cycle, improved finished product rate, reduce production cost, and can guarantee the quality in kind of product.
The specific embodiment
Present embodiment according to get the raw materials ready, EAF electric furnace smelting, LF external refining, VD vacuum outgas, CCM continuous casting, high speed wire rolling and wire rod operation smelt the 55CrSi wire rod steel, chemical compositions such as the contained CrSi of this 55CrSi wire rod steel are as follows:
55CrSi chemical component table wt%
| C | Mn | Si | P | S | Cr |
| 0.50～0.60 | 0.50～0.80 | 1.20～1.60 | ≤0.030 | ≤0.030 | 0.50～0.80 |
Claims (2)
1,55CrSi wire rod steel production technology comprises following operation: get the raw materials ready (1), (2) EAF electric furnace smelting, (3) LF external refining, (4) VD vacuum outgas, (5) CCM continuous casting, (6) high speed wire rolling, (7) wire rod; It is characterized in that described LF external refining operation: refining time is 30～60 minutes, adjust chemical composition with no aluminium alloy, soft mixing time is greater than 3 minutes, to promote to be mingled with come-up, refining every stove molten steel in latter stage is fed 200～400 meters on CaSi line, and tapping temperature is controlled at 1610～1650 ℃.
2,55CrSi wire rod steel production technology according to claim 1 is characterized in that described high speed wire rolling operation: be meant continuous casting billet is carried out total ball blast, by propping up by the face check, defective continuous casting billet is carried out reconditioning handle; Single stove is rolling, must not organize and criticize; Start rolling temperature is 950～1050 ℃; Pre-final rolling temperature is 910～930 ℃; Subtracting the sizing temperature is 830～880 ℃; Laying temperature is 850～880 ℃; The stelmor travelling speed is 16～20m/min; Stay-warm case 1A～3A opens; Blower fan leaves 30～60% 1～No. 2, and all the other are closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100853405A CN100478124C (en) | 2004-10-11 | 2004-10-11 | Technique for producing 55CrSi bull rod steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100853405A CN100478124C (en) | 2004-10-11 | 2004-10-11 | Technique for producing 55CrSi bull rod steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1759976A CN1759976A (en) | 2006-04-19 |
| CN100478124C true CN100478124C (en) | 2009-04-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100853405A Active CN100478124C (en) | 2004-10-11 | 2004-10-11 | Technique for producing 55CrSi bull rod steel |
Country Status (1)
| Country | Link |
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| CN (1) | CN100478124C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101717893B (en) * | 2009-12-15 | 2012-08-22 | 南京钢铁股份有限公司 | 55Si2MnVNbN spring steel and production process thereof |
| CN101792843B (en) * | 2010-01-19 | 2011-09-21 | 南京钢铁股份有限公司 | Production process of Nb-containing mill coil for automobile |
| CN101928892B (en) * | 2010-08-27 | 2012-05-02 | 南京钢铁股份有限公司 | Spring steel round steel and production process thereof |
| CN103465133B (en) * | 2013-09-30 | 2015-06-24 | 山西太钢不锈钢股份有限公司 | Polishing method for stainless steel continuous casting rolled slab 00 section |
-
2004
- 2004-10-11 CN CNB2004100853405A patent/CN100478124C/en active Active
Non-Patent Citations (6)
| Title |
|---|
| 60Si2Mn连铸方坯的生产实践. 郑淑胜，吴桓，陈小武.山东冶金，第20卷第6期. 1998 |
| 60Si2Mn连铸方坯的生产实践. 郑淑胜，吴桓，陈小武.山东冶金，第20卷第6期. 1998 * |
| 对国内特殊钢冶炼及连铸技术的分析和探讨. 王忠英，李振京.中国冶金，第8期. 2004 |
| 对国内特殊钢冶炼及连铸技术的分析和探讨. 王忠英，李振京.中国冶金，第8期. 2004 * |
| 轿车悬架簧用55CrSi弹簧钢线材的开发. 张忠铧，吕卫东，万根节，张驰，邢献强.金属制品，第27卷第1期. 2001 |
| 轿车悬架簧用55CrSi弹簧钢线材的开发. 张忠铧，吕卫东，万根节，张驰，邢献强.金属制品，第27卷第1期. 2001 * |
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| Publication number | Publication date |
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| CN1759976A (en) | 2006-04-19 |
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Owner name: GUANGDONG YADA ELECTRIC CO., LTD. Free format text: FORMER NAME: YADA ELECTRONICS CO., LTD., HEYUAN |
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| CB03 | Change of inventor or designer information |
Inventor after: Ye Jiansong Inventor after: Lin Xian Inventor after: Yu Guosong Inventor after: Wu Xiaoliang Inventor after: Wang Wengui Inventor after: Zhou Yin Inventor before: Ye Jiansong Inventor before: Lin Xian Inventor before: Yu Guosong Inventor before: Wu Xiaoliang Inventor before: Wang Wengui Inventor before: Zhou Yin |