CN111940507A - Process for rolling thin and wide titanium plate in one fire - Google Patents
Process for rolling thin and wide titanium plate in one fire Download PDFInfo
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- CN111940507A CN111940507A CN202010624772.8A CN202010624772A CN111940507A CN 111940507 A CN111940507 A CN 111940507A CN 202010624772 A CN202010624772 A CN 202010624772A CN 111940507 A CN111940507 A CN 111940507A
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- Prior art keywords
- rolling
- fire
- titanium
- thin
- heating
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- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 title claims abstract description 69
- 239000010936 titanium Substances 0.000 title claims abstract description 69
- 238000005096 rolling process Methods 0.000 title claims abstract description 68
- 229910052719 titanium Inorganic materials 0.000 title claims abstract description 68
- 238000000034 method Methods 0.000 title claims abstract description 29
- 230000008569 process Effects 0.000 title claims abstract description 19
- 238000010438 heat treatment Methods 0.000 claims abstract description 54
- 238000001816 cooling Methods 0.000 claims abstract description 17
- 229910001018 Cast iron Inorganic materials 0.000 claims abstract description 10
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 10
- 239000011651 chromium Substances 0.000 claims abstract description 10
- 229910000975 Carbon steel Inorganic materials 0.000 claims description 18
- 239000010962 carbon steel Substances 0.000 claims description 18
- 230000002441 reversible effect Effects 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 230000009467 reduction Effects 0.000 claims description 5
- 238000009966 trimming Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 14
- 238000005516 engineering process Methods 0.000 abstract description 5
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 abstract description 2
- 239000007769 metal material Substances 0.000 abstract description 2
- 229910001069 Ti alloy Inorganic materials 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 2
- 238000005098 hot rolling Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000002436 steel type Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000008267 milk Substances 0.000 description 1
- 210000004080 milk Anatomy 0.000 description 1
- 235000013336 milk Nutrition 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 238000010301 surface-oxidation reaction Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/02—Shape or construction of rolls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Metal Rolling (AREA)
Abstract
The invention discloses a process for rolling thin and wide specification titanium plates at one fire, which belongs to the technology of manufacturing non-ferrous metal materials, and sequentially comprises blank heating, descaling, rolling and cooling, wherein the blank heating is a traceless heating method, the titanium plates with the thickness of 6-15mm are rolled at one fire, a 2800mm medium and thick plate rolling mill is adopted in the rolling process, and a roller of the rolling mill is made of high-chromium cast iron, and the convexity of the high-chromium cast iron is increased by 0.03-0.07 mm. The invention adopts the titanium billet traceless heating technology, the roller convexity design and the one-shot rolling, adopts the manufacturing method of producing the industrial titanium plate by adopting the 2800mm medium plate rolling mill, and has the advantages of low investment and production cost, high production efficiency, good surface quality and performance meeting and higher than the national standard requirement.
Description
Technical Field
The invention relates to a technology for rolling a thin and wide titanium plate by one fire, belonging to the manufacturing technology of non-ferrous metal materials.
Background
Titanium and titanium alloy have higher specific strength, good corrosion resistance and biocompatibility, so that the titanium and titanium alloy can be widely applied to the fields of aerospace, oceans, petrochemical engineering, bioengineering and the like. The titanium condition of a state can reflect the overall level of the titanium material processing field of the state, such as a U.S. type supersonic speed scout, and the titanium material accounts for 93 percent of the weight of the whole airplane; the Russian Navy II-grade titanium alloy attack nuclear submarine is one of the most advanced nuclear submarines in the world, and because the whole submarine shell is made of titanium alloy, the weight is light, the strength is high, and the sailing speed and the submergence depth are superior to those of American submarines; the Chinese flood dragon manned submersible is a deep sea submersible which can submerge to below 5000m in most of the world, and the titanium alloy shell with the thickness of 0.5 m ensures that the submersible has very large deformation resistance and cannot be crushed.
In the production of titanium plates, the occupancy of industrial pure titanium plates is very large, accounting for about 90%, and by 2015, the titanium materials are consumed by China for about 8.8 ten thousand tons, wherein the occupancy of the industrial pure titanium plates is 55.7%. About 4.84 ten thousand tons, its specification is from 0.3-70 mm from the thickness specification, the width reaches 2500mm, the board processing presents the characteristics that the specification is many, single specification output is few, if invest in and build the production line of metal titanium plate milk high investment cost alone, the utilization rate of equipment is low. At present, the production of titanium plates generally comprises the following steps of heating blanks, descaling, rolling, cooling, post-treatment and the like, but has the following problems: (1) the blank heating is generally carried out in a heating furnace, hard friction exists, the titanium blank is soft in a high-temperature state, the scratch problem exists, the width between water flows of the heating furnace is 1.6m, the titanium blank with the width less than 1.6m cannot be put into the furnace for heating, the risk of falling off the channel exists when the plate blank with the width more than 1.6m is heated in the furnace, on the other hand, the titanium blank is in contact with a water beam, the water beam takes away the temperature of the lower surface of the titanium blank, the problem of uneven heating of the lower surface is inevitably caused in the heating furnace process; (2) the roller has the problems of abrasion of a hardened layer, indentation of iron nodules and the like on the surface after rolling a large amount of carbon steel; (3) the titanium plate with the thickness less than 15mm is rolled by two-hot-rolling, the surface oxidation of the middle link of the titanium blank is increased by the two-hot-rolling, the grinding amount needs to be repaired again in the subsequent rolling process, the grinding amount is about 4 percent, the labor intensity is increased, and the yield of the titanium plate is reduced; the two-fire rolling prolongs the production period of the product, carries out secondary heating, increases the power energy consumption and increases the production cost.
Disclosure of Invention
The invention aims to: aiming at the problems, the invention provides a process for rolling a thin and wide titanium plate by one fire.
The technical scheme adopted by the invention is as follows:
a process for rolling thin and wide titanium plates sequentially comprises blank heating, descaling, rolling and cooling, wherein the blank heating is a traceless heating method, the thickness of the titanium plates is 6-15mm, a 2800mm medium and heavy plate rolling mill is adopted in the rolling process, and rollers of the rolling mill are made of high-chromium cast iron, and the convexity of the high-chromium cast iron is increased by 0.03-0.07 mm. The titanium plate produced by the method has the specification of (6-15) mm/2000/12 m and the maximum single weight of 2 tons.
Preferably, the roller crown is increased by 0.05 mm.
Preferably, the traceless heating method is to adopt a push type heating furnace to carry out bracket layered heating, and the titanium plate with the thickness of 6-8.9mm is rolled in one fire.
Preferably, the bracket layered heating comprises the following specific steps: carbon steel is used as a bracket, a layer of titanium billet is placed on the layer of carbon steel, the titanium billet is clamped by a crown block and then is heated in a steel-pushing type heating furnace in a layering way, and finally the carbon steel is conveyed away by a roller way.
Preferably, the 2800mm heavy and medium plate mill is a 2800mm four high reversible mill.
Preferably, the rolling process is that a 2800mm four-roller reversible rolling mill is adopted to roll the blank for 8-9 times, the reduction rate is less than 40%, the initial rolling temperature is more than or equal to 830 ℃, and the final rolling temperature is more than 700 ℃.
Preferably, the descaling is carried out by using high-pressure water of 22.5 MPa.
Preferably, the cooling rate is 13 ℃/s and the final cooling temperature is 580 ℃.
Preferably, straightening and trimming are also included.
Compared with the prior art, the invention has the beneficial effects that:
(1) the invention adopts the titanium billet traceless heating technology, the roller convexity design and the one-shot rolling, adopts the manufacturing method of producing the industrial titanium plate by adopting the 2800mm medium plate rolling mill, and has the advantages of low investment and production cost, high production efficiency, good surface quality and performance meeting and higher than the national standard requirement.
(2) Compared with the traditional process, the invention adopts the push steel type heating furnace to carry out bracket layered heating, thereby avoiding the risk of softening, deforming and scratching caused by the contact of the titanium billet and the water beam on one hand, ensuring more uniform temperature of the titanium billet on the other hand, and realizing the control of +/-10 ℃ of the temperature difference of the upper surface and the lower surface.
(3) Compared with the traditional process, the convexity of the roller for rolling the titanium plate is increased by about 0.03-0.07mm on the basis of carbon steel, and the roller made of high-chromium cast iron is adopted, so that the problems that the surface of the roller is abraded by a hardened layer, is indented by iron nodules and the like after rolling a large amount of carbon steel are solved, and the surface quality of the rolled titanium plate is improved.
(4) Compared with the prior art that titanium plates rolled by titanium medium plates in China are rolled by two times to form materials, the titanium plates are heated for the second time, the power energy consumption is increased, and the production cost is increased.
(5) The continuous heat treatment heating furnace (the push steel type heating furnace is adopted for bracket layered heating) has the capability of titanium plate heat treatment, can realize on-line continuous heat treatment, and can realize continuous production under the synergistic action of the continuous heat treatment heating furnace and the middle plate four-roller reversible rolling mill.
Detailed Description
The present invention will be described in further detail in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
Example 1
A process for rolling thin and wide titanium plates in one fire sequentially comprises blank heating, descaling, rolling and cooling, wherein the blank heating is a traceless heating method, the titanium plates with the thickness of 6-15mm are rolled in one fire, and rollers of a rolling mill are made of high-chromium cast iron and the convexity of each roller is increased by 0.03 mm. The layered heating of the bracket comprises the following specific steps: carbon steel is used as a bracket, a layer of titanium billet is placed on the layer of carbon steel, the titanium billet is clamped by a crown block and then is heated in a steel-pushing type heating furnace in a layering way, and finally the carbon steel is conveyed away by a roller way. The 2800mm medium and heavy plate mill is a 2800mm four-roller reversible mill. The rolling process is that a 2800mm four-roller reversible rolling mill is adopted to roll the blank for 8 times, the reduction rate is less than 40%, the initial rolling temperature is more than or equal to 830 ℃, and the final rolling temperature is more than 700 ℃. The descaling is carried out by adopting 22.5Mpa high-pressure water. The cooling rate was 13 ℃/s and the cooling temperature was 580 ℃. And then straightening and trimming.
The yield strength of the titanium plate rolled in the embodiment is 286MPa, the tensile strength is 368MPa, the elongation of A50 is 33.5%, and the performance meets the technical conditions of TA1 national standard GB/T3621-2007.
Example 2
A process for rolling thin and wide titanium plates in one fire sequentially comprises blank heating, descaling, rolling and cooling, wherein the blank heating is a traceless heating method, the titanium plates with the thickness of 6-15mm are rolled in one fire, and rollers of a rolling mill are made of high-chromium cast iron and the convexity of each roller is increased by 0.05 mm. The layered heating of the bracket comprises the following specific steps: carbon steel is used as a bracket, a layer of titanium billet is placed on the layer of carbon steel, the titanium billet is clamped by a crown block and then is heated in a steel-pushing type heating furnace in a layering way, and finally the carbon steel is conveyed away by a roller way. The 2800mm medium and heavy plate mill is a 2800mm four-roller reversible mill. The rolling process is that a 2800mm four-roller reversible rolling mill is adopted to roll the blank for 8-9 times, the reduction rate is less than 40%, the initial rolling temperature is more than or equal to 830 ℃, and the final rolling temperature is more than 700 ℃. The descaling is carried out by adopting 22.5Mpa high-pressure water. The cooling rate was 10 ℃/s and the cooling temperature was 640 ℃. And then straightening and trimming.
The yield strength of the titanium plate rolled in the embodiment is 328MPa, the tensile strength is 452MPa, the elongation of A50 is 31.0%, and the performance meets the technical conditions of TA2 national standard GB/T3621-2007 and American national standard ASTM B265.
Example 3
A process for rolling thin and wide titanium plates in one fire sequentially comprises blank heating, descaling, rolling and cooling, wherein the blank heating is a traceless heating method, the titanium plates with the thickness of 6-15mm are rolled in one fire, and a roller of a rolling mill is made of high-chromium cast iron and the convexity of the roller is increased by 0.07 mm. The layered heating of the bracket comprises the following specific steps: a layer of titanium billet is placed on a layer of carbon steel by using the carbon steel as a bracket, the titanium billet is clamped by a crown block and then is heated in a steel-pushing type heating furnace in a layering way, and finally the carbon steel is conveyed away by a roller way. The 2800mm medium and heavy plate mill is a 2800mm four-roller reversible mill. The rolling process is specifically that a 2800mm four-roller reversible rolling mill is adopted to roll the blank for 9 times, the reduction rate is less than 40%, the initial rolling temperature is more than or equal to 830 ℃, and the final rolling temperature is more than 700 ℃. The descaling is carried out by adopting 22.5Mpa high-pressure water. The cooling rate was 6.5 ℃/s and the cooling temperature was 630 ℃. And then straightening and trimming.
The yield strength of the titanium plate rolled in the embodiment is 341MPa, the tensile strength is 443MPa, the elongation of A50 is 31.5%, and the performance meets the technical conditions of TA2 national standard GB/T3621-2007 and American national standard ASTM B265.
The above-mentioned embodiments only express the specific embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for those skilled in the art, without departing from the technical idea of the present application, several changes and modifications can be made, which are all within the protection scope of the present application.
Claims (8)
1. A process for rolling thin and wide titanium plates in one fire sequentially comprises blank heating, descaling, rolling and cooling, and is characterized in that the blank heating is a traceless heating method, the titanium plates with the thickness of 6-15mm are rolled in one fire, a 2800mm medium and heavy plate rolling mill is adopted in the rolling process, and rollers of the rolling mill are made of high-chromium cast iron, and the convexity of the high-chromium cast iron is increased by 0.03-0.07 mm.
2. The process for one-fire rolling of thin and wide specification titanium plate according to claim 1, wherein the traceless heating method is a bracket layered heating method using a push type heating furnace, and the one-fire rolling of the specification titanium plate with the thickness of 6-8.9 mm.
3. The process for rolling the thin and wide specification titanium plate by one fire as claimed in claim 2, wherein the bracket layered heating comprises the following specific steps: carbon steel is used as a bracket, a layer of titanium billet is placed on the layer of carbon steel, the titanium billet is clamped by a crown block and then is heated in a steel-pushing type heating furnace in a layering way, and finally the carbon steel is conveyed away by a roller way.
4. The process for rolling thin and wide gauge titanium plate in one fire as claimed in claim 1, wherein the 2800mm heavy and medium plate mill is a 2800mm four high reversible mill.
5. The process for rolling the thin and wide specification titanium plate at one fire according to claim 4, wherein the rolling process is carried out by rolling the blank by a 2800mm four-high reversible rolling mill for 8-9 times, the reduction rate is less than 40%, the initial rolling temperature is not less than 830 ℃, and the final rolling temperature is more than 700 ℃.
6. The process for rolling the thin and wide specification titanium plate by one fire according to claim 1, wherein the descaling is carried out by using high-pressure water with the pressure of 19.5-22.5 MPa.
7. The process for rolling the thin and wide specification titanium plate in one fire as claimed in claim 1, wherein the cooling rate is 5-13 ℃/s, and the final cooling temperature is 580-650 ℃.
8. The process for one-shot rolling of thin and wide gauge titanium plate as claimed in claim 1, further comprising straightening and trimming.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010624772.8A CN111940507A (en) | 2020-07-02 | 2020-07-02 | Process for rolling thin and wide titanium plate in one fire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010624772.8A CN111940507A (en) | 2020-07-02 | 2020-07-02 | Process for rolling thin and wide titanium plate in one fire |
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| Publication Number | Publication Date |
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| CN111940507A true CN111940507A (en) | 2020-11-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010624772.8A Pending CN111940507A (en) | 2020-07-02 | 2020-07-02 | Process for rolling thin and wide titanium plate in one fire |
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| Country | Link |
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| CN (1) | CN111940507A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112916617A (en) * | 2021-01-22 | 2021-06-08 | 钢铁研究总院 | Annealing-free recrystallization hot rolling process of TA1 titanium plate and TA1 titanium plate |
| CN114602971A (en) * | 2022-04-01 | 2022-06-10 | 浙江富钢金属制品有限公司 | Production process of pure titanium ingot by one-step firing |
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| CN102031469A (en) * | 2010-12-28 | 2011-04-27 | 西部钛业有限责任公司 | Method for heating large titanium and titanium alloy slabs |
| CN102794299A (en) * | 2012-08-22 | 2012-11-28 | 西部钛业有限责任公司 | Rolling method of titanium steel composite board |
| CN203470467U (en) * | 2013-08-15 | 2014-03-12 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Roller assembly of four-roll reversible type rolling mill |
| KR20140083574A (en) * | 2012-12-26 | 2014-07-04 | 주식회사 포스코 | Hot rolling apparatus and method for titanium plate |
| CN106475415A (en) * | 2016-10-17 | 2017-03-08 | 攀钢集团攀枝花钢钒有限公司 | The hot continuous rolling method of technical pure titanium or titanium alloy |
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2020
- 2020-07-02 CN CN202010624772.8A patent/CN111940507A/en active Pending
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112916617A (en) * | 2021-01-22 | 2021-06-08 | 钢铁研究总院 | Annealing-free recrystallization hot rolling process of TA1 titanium plate and TA1 titanium plate |
| CN112916617B (en) * | 2021-01-22 | 2022-02-25 | 钢铁研究总院 | Annealing-free recrystallization hot rolling process of TA1 titanium plate and TA1 titanium plate |
| CN114602971A (en) * | 2022-04-01 | 2022-06-10 | 浙江富钢金属制品有限公司 | Production process of pure titanium ingot by one-step firing |
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Application publication date: 20201117 |