CN103436687A - Controlled cooling technology of high-alloy tool steel - Google Patents
Controlled cooling technology of high-alloy tool steel Download PDFInfo
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- CN103436687A CN103436687A CN2013103274899A CN201310327489A CN103436687A CN 103436687 A CN103436687 A CN 103436687A CN 2013103274899 A CN2013103274899 A CN 2013103274899A CN 201310327489 A CN201310327489 A CN 201310327489A CN 103436687 A CN103436687 A CN 103436687A
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Abstract
The invention discloses a controlled cooling technology of high-alloy tool steel, which comprises the steps that controlled cooling is conducted by a water cooling line at the front of an RSM (rolling steel material) unit and a stelmor air cooling line, so that the high-alloy tool steel meeting a requirement is obtained; a 2-1# water tank and a 2-2# water tank which are at the front of the RSM unit are used for cooling, so that an appropriate rolling temperature of the RSM unit is obtained; the stelmor air cooling line obtains an optimal phase change transformation temperature through rollway speed adjustment, fan opening adjustment, and opening adjustment of an air cooling cover cap; and the high-alloy tool steel is obtained. The controlled cooling technology achieves grain refinement and a martensite ratio of above 85%, and the quality of a high-alloy tool steel coil rod is improved.
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 of high alloy tool steel.
Background technology
The high alloy tool steel wire rod, electric screw cutter head, the superhard cross that is mainly used in making the foreign markets such as American-European such as plays at the five metals class instrument, the properties such as that requirement has is superhard, high tenacity, wear-resisting, high moment of torsion, more than modified rear hardness reaches HRC60, in order to ensure personal safety, to twist off experiment and the splitting fracture must not occur.This steel grade is originally mainly from external import at present.The domestic production quality is not to stablize very much, and technological difficulties are the control of grain size and metallographic structure.
Summary of the invention
The shortcoming existed for above prior art, the Controlled cooling process that the purpose of this invention is to provide a kind of high alloy tool steel, this technique improves high alloy tool steel wire rod martensite ratio by water-cooled line, Stelmor cooling line process adjustments, the crystal grain thinning degree, improve the high alloy tool steel high strength simultaneously.
The objective of the invention is to be achieved through the following technical solutions:
A kind of Controlled cooling process of high alloy tool steel is characterized in that: the front water-cooled line of this technology utilization RSM unit and Stanermo wind-cooling linear are controlled cold, obtain satisfactory high alloy tool steel, and specific requirement is as follows:
1) by 2-1#, 2-2# water tank before the RSM unit, carry out the cooling suitable RSM unit rolling temperature that obtains;
2) Stanermo wind-cooling linear by roller table speed regulate, blower fan regulation, air-cooled cover cap open and regulate, and obtains best phase change transition temperature, obtains high alloy tool steel.
In step 1) of the present invention, 2-1#, 2-2# water tank all come into operation, and improve cooling power and homogeneity, guarantee into RSM unit temperature lower than 850 ℃ low temperature finish to gauge, crystal grain thinning; Wherein, total pipe pressure 5.5bar, aperture 70%; 2-1# tank pressure 2.5bar, aperture 90%; 2-2# tank pressure 3.1 bar, aperture 90%.
Step 2) in, the 1-5# blower fan is carried out to regulation 90%, improve the cooling power after weaving silk, allow the rear wire rod of weaving silk be cooled fast in 600 ℃; 6-16# blower fan 0.After air-cooled 600 ℃, the 1-10# cover cap is opened, and all the other cover caps are closed, and the roller-way gear is arranged on 5 grades, enters holding-zone, makes phase change zone from the austenite fast transition to martensite, thereby controls the martensite ratio.
The present invention is all come into operation by 2-1# before RSM, 2-2# water tank, realizes that 850 ℃ with interior low temperature finish to gauge; 1-5# blower fan blower fan 90%, be cooled fast to 600 ℃ with the interior holding-zone that enters after weaving silk.Realize crystal grain thinning and 85% above martensite ratio simultaneously, improved the quality of high alloy tool steel wire rod.
Advantage of the present invention is: by suitable process adjustments, but crystal grain thinning improves the martensite ratio, and guarantees the quality of high alloy tool steel wire rod.
Embodiment
A kind of Controlled cooling process of high alloy tool steel, comprise front 2-1#, the 2-2# water tank of RSM unit (wire rod reducing sizing mill group), carries out the cooling suitable RSM unit rolling temperature that obtains; Stanermo wind-cooling linear by roller table speed regulate, blower fan regulation, air-cooled cover cap open and regulate, and obtains best phase change transition temperature.Controlled cooling process carries out according to the following steps:
1, all come into operation at 2-1#, 2-2# water tank, improve cooling power and homogeneity, guarantee into RSM unit temperature lower than 850 ℃ low temperature finish to gauge, crystal grain thinning.The water-cooled line arranges, total pipe pressure 5.5bar, aperture 70%; 2-1# tank pressure 2.5bar, aperture 90%; 2-2# tank pressure 3.1 bar, aperture 90%.
2, the 1-5# blower fan is carried out to regulation 90%, improve the cooling power after weaving silk, allow the rear wire rod of weaving silk be cooled fast in 600 ℃.Blower fan arranges, 1# blower fan 90%, 2# blower fan 90%, 3# blower fan 90%, 4# blower fan 90%, 5# blower fan 90%, 6-16# blower fan 0.
3, after air-cooled 600 ℃, the 1-10# cover cap is opened, and all the other cover caps are closed, and the roller-way gear is arranged on 5 grades, enters holding-zone, makes phase change zone from the austenite fast transition to martensite, thereby controls the martensite ratio.
The present invention carrys out crystal grain thinning by suitable process adjustments, improves the martensite ratio, and guarantees the quality of high alloy tool steel wire rod.
Claims (4)
1. the Controlled cooling process of a high alloy tool steel is characterized in that: before this technology utilization RSM unit, water-cooled line and Stanermo wind-cooling linear are controlled coldly, obtain satisfactory high alloy tool steel, and specific requirement is as follows:
1) by 2-1#, 2-2# water tank before the RSM unit, carry out the cooling suitable RSM unit rolling temperature that obtains;
2) Stanermo wind-cooling linear by roller table speed regulate, blower fan regulation, air-cooled cover cap open and regulate, and obtains best phase change transition temperature, obtains high alloy tool steel.
2. the Controlled cooling process of high alloy tool steel according to claim 1, it is characterized in that: in step 1), 2-1#, 2-2# water tank all come into operation, improve cooling power and homogeneity, guarantee into RSM unit temperature lower than 850 ℃ low temperature finish to gauge, crystal grain thinning; Wherein, total pipe pressure 5.5bar, aperture 70%; 2-1# tank pressure 2.5bar, aperture 90%; 2-2# tank pressure 3.1 bar, aperture 90%.
3. the Controlled cooling process of high alloy tool steel according to claim 1, is characterized in that: step 2) in, the 1-5# blower fan is carried out to regulation 90%, improve the cooling power after weaving silk, allow the rear wire rod of weaving silk be cooled fast in 600 ℃; 6-16# blower fan 0.
4. the Controlled cooling process of high alloy tool steel according to claim 1, it is characterized in that: step 2) in, after air-cooled 600 ℃, the 1-10# cover cap is opened, all the other cover caps are closed, and the roller-way gear is arranged on 5 grades, enters holding-zone, make phase change zone from the austenite fast transition to martensite, thereby control the martensite ratio.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2013103274899A CN103436687A (en) | 2013-07-31 | 2013-07-31 | Controlled cooling technology of high-alloy tool steel |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013103274899A CN103436687A (en) | 2013-07-31 | 2013-07-31 | Controlled cooling technology of high-alloy tool steel |
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| CN103436687A true CN103436687A (en) | 2013-12-11 |
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| CN2013103274899A Pending CN103436687A (en) | 2013-07-31 | 2013-07-31 | Controlled cooling technology of high-alloy tool steel |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105149878A (en) * | 2015-09-08 | 2015-12-16 | 南京钢铁股份有限公司 | Production technology of high-alloy tool steel wire rod |
| US9754750B2 (en) | 2013-08-14 | 2017-09-05 | Xiamen Hongfa Electroacoustic Co., Ltd. | Magnetic latching relay of parallel type magnetic circuit |
| CN110760659A (en) * | 2019-09-27 | 2020-02-07 | 南京钢铁股份有限公司 | Rolling process of weather-resistant welding wire steel for bridge |
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| CN101185938A (en) * | 2006-11-09 | 2008-05-28 | 钢铁研究总院 | Method for producing steel bar with rib |
| CN101514423A (en) * | 2009-03-27 | 2009-08-26 | 武汉钢铁(集团)公司 | Aluminiferous low-carbon cold heading wire rod steel and production method thereof |
| CN101705429A (en) * | 2009-11-27 | 2010-05-12 | 天津钢铁集团有限公司 | Wire rod of high-speed railroad no-slag sleeper slab steel wire and production method thereof |
| CN103468920A (en) * | 2013-08-20 | 2013-12-25 | 首钢总公司 | High-carbon steel rod on-line aging high-speed production method |
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2013
- 2013-07-31 CN CN2013103274899A patent/CN103436687A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101185938A (en) * | 2006-11-09 | 2008-05-28 | 钢铁研究总院 | Method for producing steel bar with rib |
| CN101514423A (en) * | 2009-03-27 | 2009-08-26 | 武汉钢铁(集团)公司 | Aluminiferous low-carbon cold heading wire rod steel and production method thereof |
| CN101705429A (en) * | 2009-11-27 | 2010-05-12 | 天津钢铁集团有限公司 | Wire rod of high-speed railroad no-slag sleeper slab steel wire and production method thereof |
| CN103468920A (en) * | 2013-08-20 | 2013-12-25 | 首钢总公司 | High-carbon steel rod on-line aging high-speed production method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9754750B2 (en) | 2013-08-14 | 2017-09-05 | Xiamen Hongfa Electroacoustic Co., Ltd. | Magnetic latching relay of parallel type magnetic circuit |
| CN105149878A (en) * | 2015-09-08 | 2015-12-16 | 南京钢铁股份有限公司 | Production technology of high-alloy tool steel wire rod |
| CN110760659A (en) * | 2019-09-27 | 2020-02-07 | 南京钢铁股份有限公司 | Rolling process of weather-resistant welding wire steel for bridge |
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Application publication date: 20131211 |