CN115383408A - Rolling process of high-manganese non-magnetic steel - Google Patents
Rolling process of high-manganese non-magnetic steel Download PDFInfo
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- CN115383408A CN115383408A CN202211103417.1A CN202211103417A CN115383408A CN 115383408 A CN115383408 A CN 115383408A CN 202211103417 A CN202211103417 A CN 202211103417A CN 115383408 A CN115383408 A CN 115383408A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 62
- 239000010959 steel Substances 0.000 title claims abstract description 62
- 238000005096 rolling process Methods 0.000 title claims abstract description 45
- 229910052748 manganese Inorganic materials 0.000 title claims abstract description 36
- 239000011572 manganese Substances 0.000 title claims abstract description 36
- 238000005520 cutting process Methods 0.000 claims description 31
- 238000010438 heat treatment Methods 0.000 claims description 22
- 230000007547 defect Effects 0.000 claims description 10
- 238000004140 cleaning Methods 0.000 claims description 8
- 239000000498 cooling water Substances 0.000 claims description 5
- 230000002159 abnormal effect Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 11
- 229910052751 metal Inorganic materials 0.000 abstract description 4
- 239000002184 metal Substances 0.000 abstract description 4
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 abstract description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 6
- 239000000571 coke Substances 0.000 description 6
- 238000002485 combustion reaction Methods 0.000 description 6
- 239000007789 gas Substances 0.000 description 6
- 239000001301 oxygen Substances 0.000 description 6
- 229910052760 oxygen Inorganic materials 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 229910001566 austenite Inorganic materials 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000005457 optimization Methods 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000033764 rhythmic process Effects 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D11/00—Process control or regulation for heat treatments
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0081—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for slabs; for billets
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Metal Rolling (AREA)
Abstract
The invention belongs to the manufacturing technology of non-ferrous metal processing technology, and discloses a high-manganese non-magnetic steel rolling technology, which is used for solving the technical problems existing in the high-manganese non-magnetic steel rolling process in the prior art.
Description
Technical Field
The invention relates to a non-ferrous metal processing technology, in particular to a rolling technology of high-manganese non-magnetic steel.
Background
The high-manganese non-magnetic steel (20 Mn23 AlV) effectively reduces energy loss generated by eddy current effect of a magnetic field due to stable structure and performance and low magnetism of austenite structure at normal temperature, is widely applied to non-magnetic structural members such as transformers, has wide application prospect in the fields of national defense and military industry, high and new technology and the like, and has wide market prospect. The normal-temperature structure of a high-manganese non-magnetic steel (20 Mn23 AlV) multiple-length plate blank is austenite, the pressure cutting has high requirements on equipment, the cost investment is high, and the prior art has no way for solving the technical problems.
Disclosure of Invention
The invention aims to solve the technical problems in the prior art and provides a rolling process of high-manganese non-magnetic steel.
In order to achieve the purpose, the invention adopts the following technical scheme:
a rolling process of high-manganese non-magnetic steel, which comprises the following steps,
step 1), cutting a high-manganese non-magnetic steel multiple-length plate blank in a flame cutting mode, and simultaneously timely cleaning cut nodules;
step 2), forming deeper vibration marks on the surface of a casting blank in the casting process, wherein generally, crack defects exist at the position, and the method adopts a surface grinding mode to eliminate the defects, adopts the surface grinding mode to eliminate the defects of the cut steel blank, and removes 4mm on the upper surface and 2mm on the lower surface;
step 3), heating the high-manganese nonmagnetic steel billet in the step 2) by using a steel pushing type heating furnace, wherein the temperature is selected to be 1100-1250 ℃;
step 4), in the rolling process, the initial rolling temperature is controlled to be 1050-1150 ℃, and the final rolling temperature is lower than 960 ℃;
step 5), adjusting the widening point of the abnormal plate blank and the first pass reduction position in time, controlling the first pass reduction within 20mm, controlling the finished product pass reduction within 15%, and controlling the biting speed within 3 m/s;
and 6) straightening for multiple times under large reduction amount, and controlling the final straightening temperature to be more than 500 ℃.
Further, descaling is needed in the rolling process in the step 4), and the descaling pass is controlled within 2 passes.
Further, in the step 4), when non-magnetic steel with the thickness of less than 12mm is rolled, the cooling water of the roller way is closed to slow down the temperature drop.
Compared with the prior art, the invention has the following beneficial effects:
the normal temperature structure of the high-manganese nonmagnetic steel (20 Mn23 AlV) multiple-length plate blank is austenite, the pressure cutting has higher requirements on equipment, and the cost investment is larger. According to the characteristics of the non-magnetic steel, the proper cutting nozzle is selected and the cutting edge is cleaned in time in a flame cutting mode, so that the cutting edge is prevented from influencing the surface quality of the steel in the subsequent rolling process, and the problem of cutting the non-magnetic steel is reasonably solved.
The wine steel medium plate heating furnace is a steel pushing type heating furnace, steel billets transversely move on a water beam in a steel pushing process and belong to hard friction, the plate blank becomes soft in a high-temperature state (larger than 1250 ℃), the scratch problem exists, the width between the water quantities of the heating furnace is 1600mm, and the size of the plate blank is limited. On the other hand, the slab is contacted with the water beam, if the temperature of the steel billet is lower than 1100 ℃, the water beam takes away the temperature of the lower surface of the slab, the problem of uneven heating of the lower surface is inevitably caused in the process of the heating furnace, and the subsequent production rolling is influenced, so that the problem can be solved by controlling the heating temperature to be 1100-1250 ℃.
Compared with other austenitic stainless steels, the non-magnetic steel has strong deformation resistance at high temperature, poor plasticity, poor metal fluidity in the rolling process, high deformation resistance, steel plate warping phenomenon caused by high deformation resistance, certain impact on the guide and guard of a rolling mill and influence on the service life of equipment, so the initial rolling temperature is 1050-1150 ℃.
The descaling pass of the invention is controlled within 2 passes, so that the deformation resistance of the material at high temperature is reduced by reducing temperature drop, and the plastic flow of metal is easy. The fine descaling is not arranged in the first 8 times of rolling the high-manganese non-magnetic steel; and when the thickness of the rolled piece is less than 20mm, fine descaling is not needed.
In order to prevent the crystal grains from excessively growing to influence subsequent service performance after rolling in a relatively high temperature range, the final rolling temperature is ensured to be lower than 960 ℃ by the measures of increasing rolling passes, controlling rolling time, slowing down rolling rhythm and the like.
Detailed Description
The present invention is further illustrated by the following examples.
Example 1:
a production process of a high-manganese nonmagnetic steel billet with the size of 10 multiplied by 2000 mm.
Step 1), cutting the high-manganese nonmagnetic steel multiple length plate blank by adopting a flame cutting mode, simultaneously timely cleaning cut knots, and controlling the flame cutting by adopting the combustion of coke oven gas and oxygen in a ratio.
And 2) eliminating defects of the cut steel billet by adopting a surface grinding mode, wherein 4mm of the upper surface is removed, and 2mm of the lower surface is removed.
And 3) heating the high-manganese nonmagnetic steel billet in the step 2) by using a steel pushing type heating furnace, wherein the temperature is 1125 ℃.
And 4) controlling the initial rolling temperature to be 1116 ℃ in the rolling process.
And step 5), coarse descaling for 1 pass. And setting 1 pass of fine descaling for the thickness of 51 mm.
And 6) closing the roller way cooling water.
Step 7), the finishing temperature is lower than 839 ℃.
And 8) controlling the rolling reduction of the first pass to be 18mm, controlling the rolling reduction of the finished product to be 6.36% and the biting speed to be 2.5m/s.
Step 9), straightening process optimization: final correction temperature is controlled at 573 ℃.
Example 2:
a production process of a high-manganese nonmagnetic billet specification with the thickness of 12 x 2000 mm.
Step 1), cutting the high-manganese nonmagnetic steel multiple length plate blank by adopting a flame cutting mode, simultaneously timely cleaning cut knots, and controlling the flame cutting by adopting the combustion of coke oven gas and oxygen in a ratio.
And 2) eliminating defects of the cut steel billet by adopting a surface grinding mode, wherein 4mm of the upper surface is removed, and 2mm of the lower surface is removed.
And 3) heating the high-manganese nonmagnetic steel billet in the step 2) by using a steel pushing type heating furnace, wherein the temperature is selected to be 1248 ℃.
And 4) controlling the initial rolling temperature to be 1149 ℃ in the rolling process.
And 5) roughly descaling for 1 pass, and setting fine descaling for 1 pass at the thickness of 43.8 mm.
And 6) closing the roller way cooling water.
Step 7), the finishing temperature is lower than 856 ℃.
Step 8), the first pass reduction is 19mm, the finished product pass reduction is controlled to be 6.76%, and the biting speed is 2.5m/s.
Step 9), straightening process optimization: the final correction temperature is controlled at 583 ℃.
Example 3:
a production process of a high-manganese nonmagnetic steel billet specification with the thickness of 20 multiplied by 2000 mm.
Step 1), cutting the high-manganese non-magnetic steel multiple-length plate blank by adopting a flame cutting mode, simultaneously cleaning cutting edges in time, and controlling the flame cutting by adopting the combustion of coke oven gas and oxygen in a ratio.
And 2) eliminating defects of the cut steel billet by adopting a surface grinding mode, wherein the upper surface is removed by 4mm, and the lower surface is removed by 2mm.
And 3) heating the high-manganese non-magnetic steel billet in the step 2) by using a steel pushing type heating furnace, wherein the temperature is 1100 ℃.
And step 4) controlling the initial rolling temperature to 1050 ℃ in the rolling process.
And 5) carrying out rough descaling for 1 pass, and setting fine descaling for 1 pass at the thickness of 64.3 mm.
And 6) closing the roller way cooling water.
And 7) finishing rolling at the temperature lower than 884 ℃.
Step 8), the first pass reduction is 17.5mm, the finished product pass reduction is controlled to be 7.26%, and the biting speed is 2.5m/s.
Step 9), straightening process optimization: the final correction temperature is controlled to be 594 ℃.
Comparative example 1:
a production process of a high-manganese nonmagnetic billet specification with the thickness of 12 x 2000 mm.
Step 1), cutting the high-manganese nonmagnetic steel multiple length plate blank by adopting a flame cutting mode, simultaneously timely cleaning cut knots, and controlling the flame cutting by adopting the combustion of coke oven gas and oxygen in a ratio.
And 2) eliminating defects of the cut steel billet by adopting a surface grinding mode, wherein the upper surface is removed by 4mm, and the lower surface is removed by 2mm.
And 3) heating the high-manganese nonmagnetic steel billet in the step 2) by using a steel pushing type heating furnace, wherein the temperature is 1073 ℃.
And 4) controlling the initial rolling temperature to be 984 ℃ in the rolling process.
And 5), the plate blank has large deformation in the rolling process, the whole plate blank is in a warping state, the implementation of the subsequent steps cannot be carried out, and the production is terminated.
Comparative example 2:
a production process of a high-manganese nonmagnetic steel billet with the size of 10 multiplied by 2000 mm.
Step 1), cutting the high-manganese non-magnetic steel multiple-length plate blank by adopting a flame cutting mode, simultaneously cleaning cutting edges in time, and controlling the flame cutting by adopting the combustion of coke oven gas and oxygen in a ratio.
And 2) eliminating defects of the cut steel billet by adopting a surface grinding mode, wherein the upper surface is removed by 4mm, and the lower surface is removed by 2mm.
And 3) heating the high-manganese nonmagnetic steel billet in the step 2) by using a steel pushing type heating furnace, wherein the temperature is selected to be 1091 ℃.
And 4) controlling the initial rolling temperature to be 997 ℃ in the rolling process.
And 5) increasing the load of the plate blank in the rolling process to cause the electricity jump of equipment, so that the implementation of the subsequent steps can not be carried out, and the production is terminated.
Comparative example 3:
a production process of a high-manganese nonmagnetic steel billet with the size of 10 multiplied by 2000 mm.
Step 1), cutting the high-manganese nonmagnetic steel multiple length plate blank by adopting a flame cutting mode, simultaneously timely cleaning cut knots, and controlling the flame cutting by adopting the combustion of coke oven gas and oxygen in a ratio.
And 2) eliminating defects of the cut steel billet by adopting a surface grinding mode, wherein 4mm of the upper surface is removed, and 2mm of the lower surface is removed.
And 3) heating the high-manganese nonmagnetic steel billet in the step 2) by using a steel pushing type heating furnace, wherein the temperature is 1271 ℃. At this time, adhesion occurs during tapping, so that the subsequent steps cannot be carried out, and the production is terminated.
Claims (3)
1. A rolling process of high-manganese non-magnetic steel is characterized by comprising the following steps: comprises the following steps of (a) preparing a solution,
step 1), cutting a high-manganese non-magnetic steel multiple-length plate blank in a flame cutting mode, and meanwhile timely cleaning cut knots;
step 2), adopting a surface grinding mode to eliminate the defects of the cut steel billet, wherein the upper surface is removed by 4mm, and the lower surface is removed by 2mm;
step 3), heating the high-manganese nonmagnetic steel billet in the step 2) by using a steel pushing type heating furnace, wherein the temperature is selected to be 1100-1250 ℃;
step 4), in the rolling process, the initial rolling temperature is controlled to be 1050-1150 ℃, and the final rolling temperature is lower than 960 ℃;
step 5), adjusting the widening point of the abnormal plate blank and the first pass reduction position in time, controlling the first pass reduction within 20mm, controlling the finished product pass reduction within 15%, and controlling the biting speed within 3 m/s;
and 6) straightening with large reduction and multiple passes, and controlling the final straightening temperature to be more than 500 ℃.
2. The rolling process of the high-manganese nonmagnetic steel as set forth in claim 1, characterized in that: in the step 4), descaling is needed in the rolling process, and the descaling pass is controlled within 2 passes.
3. The rolling process of the high-manganese nonmagnetic steel as set forth in claim 1, characterized in that: and in the step 4), when non-magnetic steel with the thickness of less than 12mm is rolled in the rolling process, the cooling water of the roller way is closed to slow down the temperature drop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211103417.1A CN115383408A (en) | 2022-09-09 | 2022-09-09 | Rolling process of high-manganese non-magnetic steel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211103417.1A CN115383408A (en) | 2022-09-09 | 2022-09-09 | Rolling process of high-manganese non-magnetic steel |
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| CN115383408A true CN115383408A (en) | 2022-11-25 |
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| CN202211103417.1A Pending CN115383408A (en) | 2022-09-09 | 2022-09-09 | Rolling process of high-manganese non-magnetic steel |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101947549A (en) * | 2010-09-10 | 2011-01-19 | 山东泰山钢铁集团有限公司 | Production technology for inhibiting nickel-saving austenitic stainless steel hot-rolled plate edge crack |
| CN104630619A (en) * | 2015-02-09 | 2015-05-20 | 武汉钢铁(集团)公司 | High silicon steel for thin slab casting and rolling production and preparation method thereof |
| CN107488815A (en) * | 2017-08-25 | 2017-12-19 | 包头钢铁（集团）有限责任公司 | A kind of medium temperature orientation silicon steel hot rolled strip and preparation method thereof |
| WO2021057117A1 (en) * | 2019-09-23 | 2021-04-01 | 南京钢铁股份有限公司 | Method for rolling super austenitic stainless steel |
| CN113020283A (en) * | 2021-03-18 | 2021-06-25 | 鞍钢股份有限公司 | Shape control method for oriented silicon steel hot-rolled steel strip |
| CN113877961A (en) * | 2021-10-22 | 2022-01-04 | 广东韶钢松山股份有限公司 | Stainless steel composite steel bar and preparation method thereof |
-
2022
- 2022-09-09 CN CN202211103417.1A patent/CN115383408A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101947549A (en) * | 2010-09-10 | 2011-01-19 | 山东泰山钢铁集团有限公司 | Production technology for inhibiting nickel-saving austenitic stainless steel hot-rolled plate edge crack |
| CN104630619A (en) * | 2015-02-09 | 2015-05-20 | 武汉钢铁(集团)公司 | High silicon steel for thin slab casting and rolling production and preparation method thereof |
| CN107488815A (en) * | 2017-08-25 | 2017-12-19 | 包头钢铁（集团）有限责任公司 | A kind of medium temperature orientation silicon steel hot rolled strip and preparation method thereof |
| WO2021057117A1 (en) * | 2019-09-23 | 2021-04-01 | 南京钢铁股份有限公司 | Method for rolling super austenitic stainless steel |
| CN113020283A (en) * | 2021-03-18 | 2021-06-25 | 鞍钢股份有限公司 | Shape control method for oriented silicon steel hot-rolled steel strip |
| CN113877961A (en) * | 2021-10-22 | 2022-01-04 | 广东韶钢松山股份有限公司 | Stainless steel composite steel bar and preparation method thereof |
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