CN102560046A - Method for controlling surface decarburization of spring steel wires - Google Patents
Method for controlling surface decarburization of spring steel wires Download PDFInfo
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Abstract
The invention belongs to the technical field of spring steel production, in particular to a method for controlling the surface decarburization of spring steel wires. The steel comprises the chemical components by weight percentage that continuous casting billets comprise the chemical components by mass percent as follows: C accounts for 0.51 to 0.59 percent, Mn accounts for 0.50 to 0.80 percent, Si accounts for 1.20 to 1.60 percent, Cr accounts for 0.5 to 0.8 percent, Ni is less or equals to 0.35 percent, Cu is less or equals to 0.25 percent, and Fe and inevitable impurities in balancing amount. The method adopts the manufacturing technology that the continuous casting billets of 150 mm multiplied by 150 mm are adopted, the first zone furnace temperature of a heating furnace is controlled to range from 900 to 960 DEG C, the second zone furnace temperature of the heating furnace is controlled to range from 990 to 1050 DEG C, the soaking zone furnace temperature of the heating furnace is controlled to range from 1050 to 1100 DEG C, in-furnace time ranges from 90 to 150 minutes, the soaking zone air-fuel ratio is controlled to be about 0.8, the spinning temperature is controlled to be about 820 DEG C, and quick cooling is performed at the cooling speed of 10 DEG C/s after spinning so as to reach about 660 DEG C. Fully decarburized layers cannot be formed on the surfaces of 55SiCr spring steel wires that are produced by utilizing the technology of the method, and the thickness of a partly decarburized layer is less than 30 micrometers.
Description
Technical field
The invention belongs to the spring steel production technical field, a kind of specifically control method of spring steel wire surface decarburization, the control method of particularly a kind of 55SiCr spring steel surface decarburization.
Background technology
Spring is crucial mechanical component, in national defence, industry, agricultural, science and technology and daily life, has all obtained using widely.The production development level of spring steel and quality and performance are being played the part of crucial role in the development of industrial sectors such as spring production, automobile, locomotive, machinery.Automobile, engine building and railway systems are main users of spring steel.In recent years, along with the lightweight and the high performance of automobile, an urgent demand improves the intensity of spring steel, improves the stress of spring.Meanwhile, along with improving constantly of domestic train running speed, particularly lorry are developed to high speed, heavily loaded direction, the same intensity that requires to improve train bogie pendulum spring prolongs fatigue lifetime.Given this, carried out number of research projects both at home and abroad in recent years, in the hope of further improving the strength level and the work-ing life of spring steel.
The spring steel surface condition is very big to its fatigue property influence, if the surface exists Decarburized structure can seriously reduce the fatigue strength and the work-ing life of spring.Spring surface will obviously influence fatigue property when having the Decarburized layer of 0.1 mm, if full Decarburized layer appears in the surface, can influence fatigue lifetime 50%.Therefore the control of decarburized layer deepness and pattern is a very important aspect of production HS high-quality spring steel.
Research about the spring steel surface decarburization at present focuses mostly in laboratory study, and the steel grade majority of research is 60Si
2Mn; Decarburization research about 55SiCr is fewer, and all is laboratory study, and the main direction of research is about the influence of Heating temperature to its surface decarburization.
Summary of the invention
Technical problem to be solved by this invention is, overcomes the shortcoming of prior art, proposes a kind of control method of spring steel wire surface decarburization, can make 55SiCr spring steel wire surface not produce full Decarburized layer, and the partial decarburization layer thickness is no more than 30 μ m.
The technical scheme that the present invention solves above technical problem is:
A kind of control method of spring steel wire surface decarburization, specifically control according to the following steps:
⑴ continuously cast bloom chemical ingredients mass percent is: C:0.51～0.59%, and Mn:0.50～0.80%, Si:1.20～1.60%, Cr:0.5～0.8%, Ni :≤0.35%, Cu :≤0.25%, surplus is Fe and unavoidable impurities;
⑵ for reducing oxidation and practical decarburized depth in the blank heating process; And guarantee that blank heating is even, and the temperature control of process furnace primary reformer is at 900～960 ℃, and the secondary reformer temperature control is at 990～1050 ℃; The soaking zone Control for Kiln Temperature is at 1050～1100 ℃, time inside furnace 90～150min;
⑶ process furnace soaking zone air-fuel ratio is controlled at 0.7～0.8, and preheating section and soaking zone air-fuel ratio are controlled at 0.9～1.1;
⑷ wire rod laying temperature is controlled at 810～830 ℃; For preventing that the ferritic decarburization takes place in the process of cooling; Crystal grain thinning also reduces ferritic structure ratio in the product, and the cooling rate with 8～11 ℃/s after wire rod is weaved silk is quickly cooled to 650～670 ℃, advances the stay-warm case slow cooling then.
The technical scheme that the present invention further limits is:
The control method of aforesaid spring steel wire surface decarburization, continuously cast bloom chemical ingredients mass percent is: C:0.52%, Mn:0.70%, Si:1.50%, Cr:0.72%, Ni:0.35%, Cu:0.25%, P:0.0094%, S:0.0023%, surplus is Fe.
The control method of aforesaid spring steel wire surface decarburization, continuously cast bloom chemical ingredients mass percent is: C:0.52%, Mn:0.68%, Si:1.48%, Cr:0.70%, Ni:0.3%, Cu:0.2%, P:0.0076%, S:0.0015%, surplus is Fe.
The control method of aforesaid spring steel wire surface decarburization, continuously cast bloom chemical ingredients mass percent is: C:0.54%, Mn:0.67%, Si:1.49%, Cr:0.69%, Ni:0.25%, Cu:0.15%, P:0.0096%, S:0.0034%, surplus is Fe.
The control method of aforesaid spring steel wire surface decarburization, continuously cast bloom chemical ingredients mass percent is: C:0.53%, Mn:0.69%, Si:1.47%, Cr:0.68%, Ni:0.15%, Cu:0.125%, P:0.0098%, S:0.0014%, surplus is Fe.
The control method of aforesaid spring steel wire surface decarburization, casting blank cross-section size are 150mm * 150mm, and product specification is Φ 8～18mm.
Advantage of the present invention is: ⑴ is through technology of the present invention, and 55SiCr spring steel wire surface does not produce full Decarburized layer, and the partial decarburization layer thickness is no more than 30 μ m; ⑵ the present invention is through process furnace Heating temperature, furnace atmosphere and cooling controlling and rolling controlling process are controlled, and is not high to equipment requirements, is convenient to implement steady quality.
Description of drawings
Fig. 1 is that photo is organized in 55SiCr spring steel of the present invention surface decarburization.
Fig. 2 is the present invention's 1/4th places metallographic structure photo.
Embodiment
Embodiment 1
Routine 1 continuously cast bloom chemical ingredients mass percent is executed in enforcement: C:0.52%, and Mn:0.70%, Si:1.50%, Cr:0.72%, Ni:0.35%, Cu:0.25%, P:0.0094%, S:0.0023%, surplus is Fe.
The technical process of present embodiment 55SiCr spring steel is: the supplementary material examination → batching → electrosmelting → LF refining → VD degassing → continuous casting → strand cooling check → blank examination → heating → de-scaling → rolling → weave silk → cool off → inspection after construction → bundling sign → warehouse-in → payment of weighing.
Present embodiment is that cross dimensions is the continuously cast bloom of 150mm * 150mm, and rolling diameter is the 55SiCr spring steel wire of 12mm, and the control method of wire surface decarburization is specially:
The process furnace heating process: be to reduce oxidation and practical decarburized depth in the blank heating process, and guarantee that blank heating is even, the temperature control of process furnace primary reformer is at 900 ℃, and the secondary reformer temperature control is at 990 ℃, and the soaking zone Control for Kiln Temperature is at 1050 ℃, time inside furnace 90min; Process furnace soaking zone air-fuel ratio is controlled at 0.7, and preheating section and soaking zone air-fuel ratio are controlled at 0.9;
Rolling technology: de-scaling water pressure 18Mpa after steel billet is come out of the stove, the finishing mill temperature in is controlled at 870 ℃, subtracts the sizing temperature in and is controlled at 86 ℃, and the wire rod laying temperature is controlled at 810 ℃;
The stelmor process for cooling: for preventing that the ferritic decarburization takes place in the process of cooling, crystal grain thinning also reduces ferritic structure ratio in the product, and the cooling rate with 8 ℃/s after wire rod is weaved silk is air-cooled to 650 ℃ fast, advances the stay-warm case slow cooling then.
Present embodiment is formulated reasonably rolling and stelmor technology for controlled cooling through process furnace Heating temperature and furnace atmosphere are controlled, and makes 55SiCr spring steel wire surface not produce full Decarburized layer, and the partial decarburization layer thickness is no more than 30 μ m.
Embodiment 2
Routine 2 continuously cast bloom chemical ingredients mass percents are executed in enforcement: C:0.52%, and Mn:0.68%, Si:1.48%, Cr:0.70%, Ni:0.3%, Cu:0.2%, P:0.0076%, S:0.0015%, surplus is Fe.
The technical process of present embodiment 55SiCr spring steel is: the supplementary material examination → batching → electrosmelting → LF refining → VD degassing → continuous casting → strand cooling check → blank examination → heating → de-scaling → rolling → weave silk → cool off → inspection after construction → bundling sign → warehouse-in → payment of weighing.
Present embodiment is that cross dimensions is the continuously cast bloom of 150mm * 150mm, and rolling diameter is the 55SiCr spring steel wire of 10mm, and the control method of wire surface decarburization is specially:
The process furnace heating process: be to reduce oxidation and practical decarburized depth in the blank heating process, and guarantee that blank heating is even, the temperature control of process furnace primary reformer is at 920 ℃, and the secondary reformer temperature control is at 1000 ℃, and the soaking zone Control for Kiln Temperature is at 1070 ℃, time inside furnace 100min; Process furnace soaking zone air-fuel ratio is controlled at 0.75, and preheating section and soaking zone air-fuel ratio are controlled at 0.95;
Rolling technology: de-scaling water pressure 19Mpa after steel billet is come out of the stove, the finishing mill temperature in is controlled at 880 ℃, subtracts the sizing temperature in and is controlled at 870 ℃, and the wire rod laying temperature is controlled at 820 ℃;
The stelmor process for cooling: for preventing that the ferritic decarburization takes place in the process of cooling, crystal grain thinning also reduces ferritic structure ratio in the product, and the cooling rate with 9 ℃/s after wire rod is weaved silk is air-cooled to 660 ℃ fast, advances the stay-warm case slow cooling then.
Present embodiment is formulated reasonably rolling and stelmor technology for controlled cooling through process furnace Heating temperature and furnace atmosphere are controlled, and makes 55SiCr spring steel wire surface not produce full Decarburized layer, and the partial decarburization layer thickness is no more than 30 μ m.
Embodiment 3
Routine 3 continuously cast bloom chemical ingredients mass percents are executed in enforcement: C:0.54%, and Mn:0.67%, Si:1.49%, Cr:0.69%, Ni:0.25%, Cu:0.15%, P:0.0096%, S:0.0034%, surplus is Fe.
The technical process of present embodiment 55SiCr spring steel is: the supplementary material examination → batching → electrosmelting → LF refining → VD degassing → continuous casting → strand cooling check → blank examination → heating → de-scaling → rolling → weave silk → cool off → inspection after construction → bundling sign → warehouse-in → payment of weighing.
Present embodiment is that cross dimensions is the continuously cast bloom of 150mm * 150mm, and rolling diameter is the 55SiCr spring steel wire of 18mm, and the control method of wire surface decarburization is specially:
The process furnace heating process: be to reduce oxidation and practical decarburized depth in the blank heating process, and guarantee that blank heating is even, the temperature control of process furnace primary reformer is at 945 ℃, and the secondary reformer temperature control is at 1020 ℃, and the soaking zone Control for Kiln Temperature is at 1080 ℃, time inside furnace 120min; Process furnace soaking zone air-fuel ratio is controlled at 0.8, and preheating section and soaking zone air-fuel ratio are controlled at 1.0;
Rolling technology: de-scaling water pressure 19Mpa after steel billet is come out of the stove, the finishing mill temperature in is controlled at 885 ℃, subtracts the sizing temperature in and is controlled at 875 ℃, and the wire rod laying temperature is controlled at 825 ℃;
The stelmor process for cooling: for preventing that the ferritic decarburization takes place in the process of cooling, crystal grain thinning also reduces ferritic structure ratio in the product, and the cooling rate with 10 ℃/s after wire rod is weaved silk is air-cooled to 665 ℃ fast, advances the stay-warm case slow cooling then.
Present embodiment is formulated reasonably rolling and stelmor technology for controlled cooling through process furnace Heating temperature and furnace atmosphere are controlled, and makes 55SiCr spring steel wire surface not produce full Decarburized layer, and the partial decarburization layer thickness is no more than 30 μ m.
Embodiment 4
Routine 4 continuously cast bloom chemical ingredients mass percents are executed in enforcement: C:0.53%, and Mn:0.69%, Si:1.47%, Cr:0.68%, Ni:0.15%, Cu:0.125%, P:0.0098%, S:0.0014%, surplus is Fe.
The technical process of present embodiment 55SiCr spring steel is: the supplementary material examination → batching → electrosmelting → LF refining → VD degassing → continuous casting → strand cooling check → blank examination → heating → de-scaling → rolling → weave silk → cool off → inspection after construction → bundling sign → warehouse-in → payment of weighing.
Present embodiment is that cross dimensions is the continuously cast bloom of 150mm * 150mm, and rolling diameter is the 55SiCr spring steel wire of 8mm, and the control method of wire surface decarburization is specially:
The process furnace heating process: be to reduce oxidation and practical decarburized depth in the blank heating process, and guarantee that blank heating is even, the temperature control of process furnace primary reformer is at 960 ℃, and the secondary reformer temperature control is at 1050 ℃, and the soaking zone Control for Kiln Temperature is at 1100 ℃, time inside furnace 150min; Process furnace soaking zone air-fuel ratio is controlled at 0.8, and preheating section and soaking zone air-fuel ratio are controlled at 1.1;
Rolling technology: de-scaling water pressure 20Mpa after steel billet is come out of the stove, the finishing mill temperature in is controlled at 890 ℃, subtracts the sizing temperature in and is controlled at 880 ℃, and the wire rod laying temperature is controlled at 830 ℃;
The stelmor process for cooling: for preventing that the ferritic decarburization takes place in the process of cooling, crystal grain thinning also reduces ferritic structure ratio in the product, and the cooling rate with 11 ℃/s after wire rod is weaved silk is air-cooled to 670 ℃ fast, advances the stay-warm case slow cooling then.
Present embodiment is formulated reasonably rolling and stelmor technology for controlled cooling through process furnace Heating temperature and furnace atmosphere are controlled, and makes 55SiCr spring steel wire surface not produce full Decarburized layer, and the partial decarburization layer thickness is no more than 30 μ m.
Fig. 1 is that photo is organized in 55SiCr spring steel of the present invention surface decarburization, can be known that by photo 55SiCr spring steel wire surface does not produce full Decarburized layer, and the partial decarburization layer thickness is no more than 30 μ m.
Fig. 2 is the present invention's 1/4th places metallographic structure photo, can be known by Fig. 2, and tissue is main with sorbite, contains a spot of ferritic and perlite.
Except that the foregoing description, the present invention can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection domain of requirement of the present invention.
Claims (6)
1. the control method of a spring steel wire surface decarburization is characterized in that: specifically control according to the following steps:
⑴ continuously cast bloom chemical ingredients mass percent is: C:0.51～0.59%, and Mn:0.50～0.80%, Si:1.20～1.60%, Cr:0.5～0.8%, Ni :≤0.35%, Cu :≤0.25%, surplus is Fe and unavoidable impurities;
⑵ for reducing oxidation and practical decarburized depth in the blank heating process; And guarantee that blank heating is even, and the temperature control of process furnace primary reformer is at 900～960 ℃, and the secondary reformer temperature control is at 990～1050 ℃; The soaking zone Control for Kiln Temperature is at 1050～1100 ℃, time inside furnace 90～150min;
⑶ process furnace soaking zone air-fuel ratio is controlled at 0.7～0.8, and preheating section and soaking zone air-fuel ratio are controlled at 0.9～1.1
⑷ wire rod laying temperature is controlled at 810～830 ℃; For preventing that the ferritic decarburization takes place in the process of cooling; Crystal grain thinning also reduces ferritic structure ratio in the product, and the cooling rate with 8～11 ℃/s after wire rod is weaved silk is quickly cooled to 650～670 ℃, advances the stay-warm case slow cooling then.
2. the control method of spring steel wire surface decarburization as claimed in claim 1 is characterized in that: continuously cast bloom chemical ingredients mass percent is: C:0.52%, Mn:0.70%, Si:1.50%; Cr:0.72%, Ni:0.35%, Cu:0.25%; P:0.0094%, S:0.0023%, surplus is Fe.
3. the control method of spring steel wire surface decarburization as claimed in claim 1 is characterized in that: continuously cast bloom chemical ingredients mass percent is: C:0.52%, Mn:0.68%, Si:1.48%; Cr:0.70%, Ni:0.3%, Cu:0.2%; P:0.0076%, S:0.0015%, surplus is Fe.
4. the control method of spring steel wire surface decarburization as claimed in claim 1 is characterized in that: continuously cast bloom chemical ingredients mass percent is: C:0.54%, Mn:0.67%, Si:1.49%; Cr:0.69%, Ni:0.25%, Cu:0.15%; P:0.0096%, S:0.0034%, surplus is Fe.
5. the control method of spring steel wire surface decarburization as claimed in claim 1 is characterized in that: continuously cast bloom chemical ingredients mass percent is: C:0.53%, Mn:0.69%; Si:1.47%, Cr:0.68%, Ni:0.15%; Cu:0.125%; P:0.0098%, S:0.0014%, surplus is Fe.
6. the control method of spring steel wire surface decarburization as claimed in claim 1 is characterized in that: said casting blank cross-section size is 150mm * 150mm, and product specification is Φ 8～18mm.
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| CN102899470A (en) * | 2012-11-05 | 2013-01-30 | 南京钢铁股份有限公司 | Method for controlling decarburization on surfaces of medium-carbon cold forging steel wires |
| CN103045935A (en) * | 2012-12-14 | 2013-04-17 | 天津钢铁集团有限公司 | Control method for surface decarburization and ferrite distribution of steel disc bar of spring |
| CN104419818A (en) * | 2013-08-22 | 2015-03-18 | 南京钢铁股份有限公司 | Heating method for cold-heading steel wire |
| WO2015129403A1 (en) * | 2014-02-28 | 2015-09-03 | 株式会社神戸製鋼所 | Rolled material for high strength spring, and wire for high strength spring |
| CN105132657A (en) * | 2015-09-29 | 2015-12-09 | 邢台钢铁有限责任公司 | Method for decreasing decarburized layers on surfaces of high-carbon-chromium bearing steel wires |
| CN105855299A (en) * | 2014-12-22 | 2016-08-17 | 北大方正集团有限公司 | Steel rolling method and steel obtained through method |
| CN106191407A (en) * | 2016-07-11 | 2016-12-07 | 南京钢铁股份有限公司 | A kind of production technology of high temperature resistant spring ribbon steel |
| CN107747060A (en) * | 2017-11-12 | 2018-03-02 | 湖南华菱湘潭钢铁有限公司 | The production method of high intensity high fatigue life spring steel |
| CN108396128A (en) * | 2017-11-28 | 2018-08-14 | 江苏省沙钢钢铁研究院有限公司 | A kind of control method of bloom alloy tool steel wire surface decarburization |
| CN108559910A (en) * | 2018-05-31 | 2018-09-21 | 马鞍山钢铁股份有限公司 | A kind of whole process TMCP thermal mechanical rolling 55SiCr spring steel and its production method |
| CN109112280A (en) * | 2018-08-07 | 2019-01-01 | 南京钢铁股份有限公司 | A kind of control method of bearing steel wire rod decarburized depth |
| CN109112246A (en) * | 2017-06-26 | 2019-01-01 | 鞍钢股份有限公司 | A kind of production method of the railway spring-fastener steel wire rod of direct cold roll forming |
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| CN110331264A (en) * | 2019-07-22 | 2019-10-15 | 南京钢铁股份有限公司 | A kind of heating Decarburization Control method of spring steel blank |
| CN111979482A (en) * | 2020-07-30 | 2020-11-24 | 南京钢铁股份有限公司 | CrMn spring steel bloom and one-step-firing material preparation method thereof |
| CN112893490A (en) * | 2021-01-25 | 2021-06-04 | 江阴兴澄特种钢铁有限公司 | Rolling and cooling method of spring flat steel |
| CN113198843A (en) * | 2021-04-25 | 2021-08-03 | 湖南华菱湘潭钢铁有限公司 | Production method of high-Si spring round steel |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102212673A (en) * | 2011-06-07 | 2011-10-12 | 武汉钢铁(集团)公司 | Control method of decarburization of continuously cast bloom for spring steel wire rods |
-
2012
- 2012-02-21 CN CN2012100399915A patent/CN102560046A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102212673A (en) * | 2011-06-07 | 2011-10-12 | 武汉钢铁(集团)公司 | Control method of decarburization of continuously cast bloom for spring steel wire rods |
Non-Patent Citations (4)
| Title |
|---|
| 《宝钢技术》 20021231 张智森 "60Si2MnA弹簧钢盘条生产中两种控冷工艺的比较" 第45-47、64页 1-6 , 第3期 * |
| 《第七届（2009）中国钢铁年会论文集》 20091231 李长胜等 "武钢汽车用弹簧钢盘条脱碳的控制" 第180-183页 1-6 , * |
| 张智森: ""60Si2MnA弹簧钢盘条生产中两种控冷工艺的比较"", 《宝钢技术》 * |
| 李长胜等: ""武钢汽车用弹簧钢盘条脱碳的控制"", 《第七届（2009）中国钢铁年会论文集》 * |
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| CN110331264A (en) * | 2019-07-22 | 2019-10-15 | 南京钢铁股份有限公司 | A kind of heating Decarburization Control method of spring steel blank |
| CN111979482A (en) * | 2020-07-30 | 2020-11-24 | 南京钢铁股份有限公司 | CrMn spring steel bloom and one-step-firing material preparation method thereof |
| CN112893490A (en) * | 2021-01-25 | 2021-06-04 | 江阴兴澄特种钢铁有限公司 | Rolling and cooling method of spring flat steel |
| CN112893490B (en) * | 2021-01-25 | 2022-04-29 | 江阴兴澄特种钢铁有限公司 | Rolling and cooling method of spring flat steel |
| CN113198843A (en) * | 2021-04-25 | 2021-08-03 | 湖南华菱湘潭钢铁有限公司 | Production method of high-Si spring round steel |
| CN113699335A (en) * | 2021-07-27 | 2021-11-26 | 宝武杰富意特殊钢有限公司 | Manufacturing method of high-quality 60Si2Mn low decarburized layer |
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Application publication date: 20120711 |