CN102962267A - Cooling control process for preventing decarbonization of small-size spring steel - Google Patents
Cooling control process for preventing decarbonization of small-size spring steel Download PDFInfo
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- CN102962267A CN102962267A CN201210487716XA CN201210487716A CN102962267A CN 102962267 A CN102962267 A CN 102962267A CN 201210487716X A CN201210487716X A CN 201210487716XA CN 201210487716 A CN201210487716 A CN 201210487716A CN 102962267 A CN102962267 A CN 102962267A
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Abstract
The invention relates to a cooling control process in the field of metallurgy and a cooling control process for preventing decarbonization of small-size spring steel. The cooling control process comprises the following steps of: respectively controlling the finishing temperature and the spinning process within 800+/-10DEG C; after spinning, closing all Stelmor fans and covers; meanwhile, setting operation speeds of Stelmor air-cooled roller tables; setting the rotating speed of a first roller table of the Stelmor air-cooled roller tables at 15-20rpm; setting the rotating speeds of roller tables on even number sections as 110 percent of the rotating speed of the first roller table; setting the rotating speeds of roller tables on odd number sections as 100 percent of the rotating speed of the first roller table; and controlling the temperature of the cover below 450DEG C to ensure that all phase changes of a pony roll in the air-cooled roller table are finished. According to the cooling control process disclosed by the invention, various part tissues in a finished product can be uniform, the structure segregation is avoided and the brittle failure of the small-size spring steel in the drawing process is prevented.
Description
Technical field
The present invention relates to a kind of Controlled cooling process of field of metallurgy, specifically a kind of Controlled cooling process that prevents the decarburization of small dimension spring steel.
Background technology
Spring steel should have high ultimate tension, and high rigidity, yield limit, elastic limit and fatigue limit are arranged, and has simultaneously high impact flexibility and plasticity.That spring material under particular service requirement also requires to have is heat-resisting, anti-corrosion, conduction, antimagnetic, low temperature resistant and permanent elastic performance.Spring is a kind of elastic working element commonly used, also is the fundamental parts on various plant equipment and the instrument and meter.
Spring makes it brake forming needing that in manufacture process wire rod is applied external force, composition, structural homogenity and structural state to wire rod have strict demand, the greatest problem of restriction small dimension spring steel is that the even cooling rate of the inhomogeneous cooling of small dimension spring steel in cooling procedure is too fast, cause local overcooling to produce martensitic structure, the brittle failure phenomenon occurs in the wind spring process.
Summary of the invention
The objective of the invention is to propose a kind of Controlled cooling process that prevents the decarburization of small dimension spring steel, can solve the technical problem of small dimension spring steel brittle failure in drawing process,
The present invention realizes that the technical scheme of above goal of the invention is:
A kind of Controlled cooling process that prevents the decarburization of small dimension spring steel, finishing temperature and laying temperature all are controlled in 800 ± 10 ℃ of scopes, make it rolling and weave silk at two-phase section, do tissue for cooling procedure and prepare; Weave silk rear stelmor blower fan complete shut-down and cover cap complete shut-down, make to coil and in air-cooled roller-way, be in the slow cooling state, simultaneously the air-cooled roller-way speed of service of stelmor is set, first roller-way speed setting of the air-cooled roller-way of stelmor is at 15-20rpm, its back segment roller-way is according to the different speed of service of single even numbers different set speed, even numbers section roller-way is set as 110% of first roller-way rotating speed, make coil can be on air-cooled roller-way abundant space out, improve the cold uniformity of going, odd number section roller-way is set as 100% of first roller-way rotating speed, reduces the cooldown rate of coiling on air-cooled roller-way; Go out the cover cap temperature and be controlled at below 450 ℃, guarantee to coil in air-cooled roller-way all phase transformations and finish.
Small dimension spring steel of the present invention wherein small dimension refers to that the diameter of spring steel is 5.5mm-6.5mm.
The invention has the beneficial effects as follows: rolling in the specified temp interval, weave silk, according to the rear cooling law of rolling of small dimension spring steel, take full advantage of the different speed of service of the air-cooled roller-way of each section of stelmor, make to coil after rolling and fully to be cooled off in the cooling procedure, can make again and coil each several part and evenly cool off, make each position even tissue in the final finished, avoid the generation of microstructure segregation, prevent the brittle failure in drawing process of small dimension spring steel.
The specific embodiment
Embodiment 1
Present embodiment is the cooling control technology of the 55SiCrA of specification Ф 5.5, comprise the finish to gauge operation, the operation of weaving silk, roll rear refrigerating work procedure, utilize water cooling box that the finishing temperature of the operation of rolling and laying temperature are controlled in 790 ℃ of scopes, make it rolling and weave silk at two-phase section, do tissue for cooling procedure and prepare; Entering Stanermo wind-cooling linear after weaving silk begins to cool down, Stanermo wind-cooling linear blower fan and cover cap Close All, make to coil and in air-cooled roller-way, be in the slow cooling state, simultaneously the air-cooled roller-way speed of service of stelmor is set, first roller-way speed setting of the air-cooled roller-way of stelmor is at 15rpm, its back segment roller-way is according to the different speed of service of single even numbers different set speed, even numbers section roller-way is set as 110% of first roller-way rotating speed, make coil can be on air-cooled roller-way abundant space out, improve the cold uniformity of going, odd number section roller-way is set as 100% of first roller-way rotating speed, reduces the cooldown rate of coiling on air-cooled roller-way; Go out the cover cap temperature after annealing process is finished and be controlled at 450 ℃, coil all phase transition process and all finish this moment, at last the collection volume.
Embodiment 2
Present embodiment is the cooling control technology of the 55SiCrA-M of specification Ф 6.5, comprise the finish to gauge operation, the operation of weaving silk, roll rear refrigerating work procedure, utilize water cooling box that the finishing temperature of the operation of rolling and laying temperature are controlled in 800 ℃ of scopes, make it rolling and weave silk at two-phase section, do tissue for cooling procedure and prepare; Entering Stanermo wind-cooling linear after weaving silk begins to cool down, Stanermo wind-cooling linear blower fan and cover cap Close All, make to coil and in air-cooled roller-way, be in the slow cooling state, simultaneously the air-cooled roller-way speed of service of stelmor is set, first roller-way speed setting of the air-cooled roller-way of stelmor is at 18rpm, its back segment roller-way is according to the different speed of service of single even numbers different set speed, even numbers section roller-way is set as 110% of first roller-way rotating speed, make coil can be on air-cooled roller-way abundant space out, improve the cold uniformity of going, odd number section roller-way is set as 100% of first roller-way rotating speed, reduces the cooldown rate of coiling on air-cooled roller-way; Go out the cover cap temperature after annealing process is finished and be controlled at 400 ℃, coil all phase transition process and all finish this moment, at last the collection volume.
Embodiment 3
Present embodiment is the cooling control technology of the 55SiCrA-M of specification Ф 6.0, comprise the finish to gauge operation, the operation of weaving silk, roll rear refrigerating work procedure, utilize water cooling box that the finishing temperature of the operation of rolling and laying temperature are controlled in 810 ℃ of scopes, make it rolling and weave silk at two-phase section, do tissue for cooling procedure and prepare; Entering Stanermo wind-cooling linear after weaving silk begins to cool down, Stanermo wind-cooling linear blower fan and cover cap Close All, make to coil and in air-cooled roller-way, be in the slow cooling state, simultaneously the air-cooled roller-way speed of service of stelmor is set, first roller-way speed setting of the air-cooled roller-way of stelmor is at 20rpm, its back segment roller-way is according to the different speed of service of single even numbers different set speed, even numbers section roller-way is set as 110% of first roller-way rotating speed, make coil can be on air-cooled roller-way abundant space out, improve the cold uniformity of going, odd number section roller-way is set as 100% of first roller-way rotating speed, reduces the cooldown rate of coiling on air-cooled roller-way; Go out the cover cap temperature after annealing process is finished and be controlled at 350 ℃, coil all phase transition process and all finish this moment, at last the collection volume.
Adopt the spring steel sampling of above embodiment production to do Metallographic Analysis, do not find the existence of microstructure segregation, finished product successfully is drawn to 3.0mm(by 5.5mm and limited by user's production equipment after sending the user on probation, only being drawn to 3.0mm, not arriving the drawing limit of material) breaking do not appear.
In addition to the implementation, 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 (2)
1. Controlled cooling process that prevents the decarburization of small dimension spring steel, it is characterized in that: finishing temperature and laying temperature all are controlled in 800 ± 10 ℃ of scopes, make it rolling and weave silk at two-phase section, do tissue for cooling procedure and prepare; Weave silk rear stelmor blower fan complete shut-down and cover cap complete shut-down, make to coil and in air-cooled roller-way, be in the slow cooling state, simultaneously the air-cooled roller-way speed of service of stelmor is set, first roller-way speed setting of the air-cooled roller-way of stelmor is at 15-20rpm, its back segment roller-way is according to the different speed of service of single even numbers different set speed, even numbers section roller-way is set as 110% of first roller-way rotating speed, make coil can be on air-cooled roller-way abundant space out, improve the cold uniformity of going, odd number section roller-way is set as 100% of first roller-way rotating speed, reduces the cooldown rate of coiling on air-cooled roller-way; Go out the cover cap temperature and be controlled at below 450 ℃, guarantee to coil in air-cooled roller-way all phase transformations and finish.
2. the heating process that prevents the decarburization of small dimension spring steel as claimed in claim 1, it is characterized in that: small dimension spring steel wherein small dimension refers to that the diameter of spring steel is 5.5mm-6.5mm.
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| CN201210487716.XA CN102962267B (en) | 2012-11-27 | 2012-11-27 | Cooling control process for preventing decarbonization of small-size spring steel |
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| CN201210487716.XA CN102962267B (en) | 2012-11-27 | 2012-11-27 | Cooling control process for preventing decarbonization of small-size spring steel |
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| CN102962267B CN102962267B (en) | 2014-09-03 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106734261A (en) * | 2016-12-12 | 2017-05-31 | 中天钢铁集团有限公司 | A kind of cold technique of Stanermo wind-cooling linear control for improving spring steel 55SiCrA wire rods tissue and performance |
| CN109759459A (en) * | 2019-02-27 | 2019-05-17 | 南京钢铁股份有限公司 | A kind of control method of slow cooling steel wire rod ring |
| CN115132298A (en) * | 2021-03-29 | 2022-09-30 | 宝山钢铁股份有限公司 | Spring steel decarburization analysis and prediction method |
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| CN1069288A (en) * | 1991-05-17 | 1993-02-24 | 赛森钢股份公司 | Produce the method for grain-oriented electrical steel sheet or steel band |
| JPH08309425A (en) * | 1995-05-23 | 1996-11-26 | Sumitomo Metal Ind Ltd | Control method for cooling of hot rolled steel sheet |
| JP2001246408A (en) * | 2000-03-01 | 2001-09-11 | Sumikin Stainless Kokan Kk | Device and method for uniformly cooling long size steel tube which is heated to high temperature |
| CN1743127A (en) * | 2005-09-29 | 2006-03-08 | 东北大学 | Method for producing oriented silicon steel band by continuous casting and rolling of thin plate slab |
| CN101775548A (en) * | 2009-12-31 | 2010-07-14 | 武汉钢铁(集团)公司 | Method for producing low nitriding amount and high magnetic induction oriented silicon steel strip |
| CN102330021A (en) * | 2011-09-16 | 2012-01-25 | 江油市丰威特种带钢有限责任公司 | Full production process of low-temperature oriented silicon steel |
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2012
- 2012-11-27 CN CN201210487716.XA patent/CN102962267B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1069288A (en) * | 1991-05-17 | 1993-02-24 | 赛森钢股份公司 | Produce the method for grain-oriented electrical steel sheet or steel band |
| JPH08309425A (en) * | 1995-05-23 | 1996-11-26 | Sumitomo Metal Ind Ltd | Control method for cooling of hot rolled steel sheet |
| JP2001246408A (en) * | 2000-03-01 | 2001-09-11 | Sumikin Stainless Kokan Kk | Device and method for uniformly cooling long size steel tube which is heated to high temperature |
| CN1743127A (en) * | 2005-09-29 | 2006-03-08 | 东北大学 | Method for producing oriented silicon steel band by continuous casting and rolling of thin plate slab |
| CN101775548A (en) * | 2009-12-31 | 2010-07-14 | 武汉钢铁(集团)公司 | Method for producing low nitriding amount and high magnetic induction oriented silicon steel strip |
| CN102330021A (en) * | 2011-09-16 | 2012-01-25 | 江油市丰威特种带钢有限责任公司 | Full production process of low-temperature oriented silicon steel |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106734261A (en) * | 2016-12-12 | 2017-05-31 | 中天钢铁集团有限公司 | A kind of cold technique of Stanermo wind-cooling linear control for improving spring steel 55SiCrA wire rods tissue and performance |
| CN109759459A (en) * | 2019-02-27 | 2019-05-17 | 南京钢铁股份有限公司 | A kind of control method of slow cooling steel wire rod ring |
| CN115132298A (en) * | 2021-03-29 | 2022-09-30 | 宝山钢铁股份有限公司 | Spring steel decarburization analysis and prediction method |
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| CN102962267B (en) | 2014-09-03 |
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