CN100453194C - Control cooling method of resolving self-break while producing high-carbon wire rod - Google Patents
Control cooling method of resolving self-break while producing high-carbon wire rod Download PDFInfo
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- CN100453194C CN100453194C CNB2005101278439A CN200510127843A CN100453194C CN 100453194 C CN100453194 C CN 100453194C CN B2005101278439 A CNB2005101278439 A CN B2005101278439A CN 200510127843 A CN200510127843 A CN 200510127843A CN 100453194 C CN100453194 C CN 100453194C
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Abstract
The present invention relates to a control cooling method for preventing high-carbon rod from producing self-breakage in its production process. Said method includes a control cooling process, and is characterized by that according to the deficiency of water cooling control after the rod is rolled, a reasonable temperature control range can be defined, before finishing rolling mill a pre-water-cooling equipment is added, so that the finishing rolling temperature can be reduced, and the austenite grain size can be further refined. Besides, before water tank a temperature-measuring device is added, so that the temperature range can be accurately controlled.
Description
Affiliated field
The invention belongs to the steel rolling field, mainly be applicable to the control cooling technology of continuous casting high-carbon steel.
Background technology
The stelmor control cooling line of producing at present high-speed rod as shown in Figure 1, steel part directly cools off through the 1-2# water tank through after the mm finishing mill unit, carries out air cooling then and rises again, further lower the temperature through the 3# water tank again, after Laying head to air-cooled line cool off.The control cold line of the milling train postorder in 3,4 generations of root air quantity short, blower fan is less as the Shoudu Iron and Steel Co high-speed wire factory owing to rub, and air-cooled control cooling section length overall is 45 meters, and the air quantity of blower fan is 83000M
3/ h, when producing high-carbon steel, in order to remedy the deficiency of blower fan cooling capacity, general by reducing laying temperature, the way that promptly increases water-cooled intensity realizes.Because high-speed wire rolling speed is very fast, the wire rod surface temperature about 1040 ℃ is reduced to 800 ℃ in a short period of time, and heart portion changes not quite, produce very big internal stress like this at the wire rod center, sharply shrink on the surface, and in the follow-up process of rising again, wire rod sharply expands again.If there are blemish such as pit, folding, crackle on the wire rod surface, sharply shrink in the process that sharply expands the back in this elder generation, defective will further be aggravated, and the lighter causes wire rod in follow-up bundling or loading and unloading transportation the nature fracture to take place, and weight person is ruptured in silking process; The Cistern valve that the milling train in 3,4 generations of root of rubbing is equipped with is manually control, it is different that the workman operates water, in order to obtain the target laying temperature, the workman 1-2# Cistern valve that the workman has when operation is opened greatly, the workman 3# Cistern valve that has is opened greatly, cause wire rod a certain section sharply cooling like this, increased the probability of natural fracture.
When producing high-carbon 82B series wire rod, because can not better controlled 1-2# and the water-cooled ability of 3# water tank, cause certain section water-cooled too violent, cause the very big internal stress of generation in the wire rod, sharply shrink on the surface, and in the follow-up process of rising again, wire rod is sharply expansion again.If there are blemish such as pit, folding, crackle on the wire rod surface, in the process that this rapid contraction is sharply expanded again, defective will further be aggravated, and the lighter causes wire rod in follow-up bundling or loading and unloading transportation the nature fracture to take place, and weight person is ruptured in silking process.
Summary of the invention
Purpose of the present invention is exactly to increase increase pre-water cooling equipment in finishing mill place in the water-cooled process, reduce the final rolling temperature of wire rod, refinement autstenitic grain size, advancing temperature measurer of 3# water tank place increase in addition, and formulate and reasonably control temperature, by reasonably controlling high-carbon steel production process water-cooled temperature, reduced the internal stress of wire rod, reduce the phenomenon of autotomying of wire rod.
The present invention relates to a kind of the solution for achieving the above object and produce the control cooling means that the high-carbon wire rod generation is autotomyed, comprise heating, rolling, control process for cooling, roll the deficiency of back water-cool control according to milling train, before going into finishing mill, increase a pre-water cooling equipment, increase the water-cooled operation one, rolled piece temperature after the pre-water-cooled is controlled at: 1030-1080 ℃, before the 3# water tank, set up a temperature measurer, control is advanced 3# water tank temperature: 890-950 ℃, laying temperature: 860-920 ℃.
When producing big specification high-carbon wire rod on root 3, the 4 generation milling train that rubs, production technology is:
Strand---heating---high-pressure water descaling---breaking down---in roll---pre-finish rolling---pre-water-cooled---finish rolling---1-2# water tank water-cooled---3# water tank water-cooled------stelmor control cooling---collection volume of weaving silk
The present invention is directed to root 3, the 4 generation milling train that rubs does not carry out fine control to water-cooled after rolling when design characteristics, controlling well in wire rod heating cycle and the air-cooled system, set up a temperature measurer entering 3# water tank place, advance the wire rod temperature of 3# water tank by control, temperature drop is rationally distributed between 1-2# and 3# water tank, be that wire rod suitably cools off through the 1-2# water tank earlier, rise again by the segment distance between 2# and 3# water tank then, further cool off by the 3# water tank again.After taking this mode, the workman is in when control, only need according to the associated documents that engineering department assigns control just can, avoided making wire rod surface and heart portion temperature difference shortcoming bigger than normal because certain water tank water-cooled is too violent; Increase a pre-water cooling equipment entering the finishing mill place in addition, reduce the final rolling temperature of wire rod, refinement autstenitic grain size.
The invention has the beneficial effects as follows by after using this method, reduced the internal stress when wire rod is produced, increased the reduction of area when wire rod rolls off the production line, solved because the wire rod that the cold deficiency of control causes produces the problem of nature fracture.
By the enforcement of this method, make Shoudu Iron and Steel Co become the enterprise of unique family large-scale production 82B series on the root 3 generation equipment that rubs at present, Shoudu Iron and Steel Co was produced 330,000 tons of 82B series wire rods altogether in 2004, and expectation in 2005 can be finished 400,000 tons.
Description of drawings
Fig. 1 is the stelmor control cooling line of wire production
Fig. 2 is the stelmor control cooling line after improving
Wherein: 1, mm finishing mill unit 2,1# water tank 3,2# water tank 4, the district 5 that rises again, 3# water tank 6, pinch roll 7, Laying head 8, temperature measurer 9, control cold line 10, collection volume 11, pre-cool equipment 12, newly-increased temperature measurer
The specific embodiment
The milling train of the 82B of Shoudu Iron and Steel Co production at present series wire rod is the root 3 generation milling train that rubs, and specifically rolls the back water-cooled and distributes as shown in Figure 1.Before in December, 2004, when producing big specification 82B wire rod, the water-cool control after rolling requires to see Table 1.
Because when the workman rolled the back water-cooled in control, each workman's control method was different, can not really accomplish the water-cooled intensity of reasonable distribution 1,2# and 3# water tank, the situation of the Ф 12.5mm specification wire rod of Sheng Chaning was as shown in table 2 at that time.
Table 1 does not adopt technology controlling and process when setting up pre-water-cooled and temperature measurer
| The control project | Start rolling temperature | Go out final rolling temperature | Laying temperature | Water-cool control |
| The control requirement | 1020-1060 ℃ | 1030-1060 ℃ | 820-860 ℃ | The water-cooled intensity of reasonable distribution 1,2# and 3# water tank |
Table 2 does not adopt the big specification 82B-1 condition of production of Shoudu Iron and Steel Co when setting up pre-water-cooled and temperature measurer
2005, Shoudu Iron and Steel Co through the tackling key problem of technology several times after, before mm finishing mill unit, added a pre-water cooling equipment, before the 3# water tank, increased a temperature measurer, as shown in Figure 2, the technology implementation status sees Table 3, implementation effect sees Table 4.
Table 3 adopts technology controlling and process when setting up pre-water-cooled and temperature measurer
| The control project | Start rolling temperature | Temperature after the pre-water-cooled | Go out final rolling temperature | Laying temperature | Water-cool control |
| The control requirement | 1020-1060 ℃ | 1030-1080℃ | 970-1030 ℃ | 860-920℃ | Advance the control of 3# water tank temperature: 890-950 ℃ |
Table 4 adopts the big specification 82B-1 condition of production of Shoudu Iron and Steel Co when setting up pre-water-cooled and temperature measurer
Claims (1)
1, a kind of solution produced the control cooling means that the high-carbon wire rod generation is autotomyed, comprise heating, rolling, the control process for cooling, it is characterized in that: the deficiency of rolling the back water-cool control according to milling train, before going into finishing mill, increase a pre-water cooling equipment, increase the water-cooled operation one, rolled piece temperature after the pre-water-cooled is controlled at: 1030-1080 ℃, set up a temperature measurer entering 3# water tank place, advance the wire rod temperature of 3# water tank by control, temperature drop is rationally distributed between 1-2# and 3# water tank, be that wire rod suitably cools off through the 1-2# water tank earlier, rise again by the segment distance between 2# and 3# water tank then, further cool off by the 3# water tank, control is advanced 3# water tank temperature: 890-950 ℃, laying temperature: 860-920 ℃ again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101278439A CN100453194C (en) | 2005-12-07 | 2005-12-07 | Control cooling method of resolving self-break while producing high-carbon wire rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101278439A CN100453194C (en) | 2005-12-07 | 2005-12-07 | Control cooling method of resolving self-break while producing high-carbon wire rod |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1978083A CN1978083A (en) | 2007-06-13 |
| CN100453194C true CN100453194C (en) | 2009-01-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2005101278439A Active CN100453194C (en) | 2005-12-07 | 2005-12-07 | Control cooling method of resolving self-break while producing high-carbon wire rod |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102310092B (en) * | 2011-09-21 | 2013-03-20 | 首钢总公司 | High-carbon wire rod cooling control method with weakening of water cooling and enhancement of air cooling |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1184718A (en) * | 1996-12-10 | 1998-06-17 | 鞍山钢铁集团公司 | Process for producing steel wire being used to produce tyre steel cord |
| CN1189400A (en) * | 1998-02-23 | 1998-08-05 | 冶金工业部钢铁研究总院 | Cooling control method used for steels after hot rolled |
| JP2001335847A (en) * | 2000-05-24 | 2001-12-04 | Nkk Corp | Steel cooling method |
| CN2595471Y (en) * | 2002-09-30 | 2003-12-31 | 马鞍山钢铁股份有限公司 | Device for rolling wire rod |
| CN1603021A (en) * | 2004-10-28 | 2005-04-06 | 鞍山科技大学 | Stelmo line gas spray cooling device and method for high-speed wire rod mill |
| KR20050068252A (en) * | 2003-12-29 | 2005-07-05 | 주식회사 포스코 | Cooling control technique using dynamic preset updating |
| JP2005270982A (en) * | 2004-03-22 | 2005-10-06 | Jfe Steel Kk | Method for controlling cooling of material to be rolled in hot rolling |
| JP2005279703A (en) * | 2004-03-29 | 2005-10-13 | Jfe Steel Kk | Method and equipment for manufacturing steel sheet |
-
2005
- 2005-12-07 CN CNB2005101278439A patent/CN100453194C/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1184718A (en) * | 1996-12-10 | 1998-06-17 | 鞍山钢铁集团公司 | Process for producing steel wire being used to produce tyre steel cord |
| CN1189400A (en) * | 1998-02-23 | 1998-08-05 | 冶金工业部钢铁研究总院 | Cooling control method used for steels after hot rolled |
| JP2001335847A (en) * | 2000-05-24 | 2001-12-04 | Nkk Corp | Steel cooling method |
| CN2595471Y (en) * | 2002-09-30 | 2003-12-31 | 马鞍山钢铁股份有限公司 | Device for rolling wire rod |
| KR20050068252A (en) * | 2003-12-29 | 2005-07-05 | 주식회사 포스코 | Cooling control technique using dynamic preset updating |
| JP2005270982A (en) * | 2004-03-22 | 2005-10-06 | Jfe Steel Kk | Method for controlling cooling of material to be rolled in hot rolling |
| JP2005279703A (en) * | 2004-03-29 | 2005-10-13 | Jfe Steel Kk | Method and equipment for manufacturing steel sheet |
| CN1603021A (en) * | 2004-10-28 | 2005-04-06 | 鞍山科技大学 | Stelmo line gas spray cooling device and method for high-speed wire rod mill |
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| Publication number | Publication date |
|---|---|
| CN1978083A (en) | 2007-06-13 |
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