CN103008978A - Method for preparing titanium plate billet - Google Patents
Method for preparing titanium plate billet Download PDFInfo
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- CN103008978A CN103008978A CN2011102819023A CN201110281902A CN103008978A CN 103008978 A CN103008978 A CN 103008978A CN 2011102819023 A CN2011102819023 A CN 2011102819023A CN 201110281902 A CN201110281902 A CN 201110281902A CN 103008978 A CN103008978 A CN 103008978A
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Abstract
The invention provides a method for preparing a titanium plate billet. The method comprises the steps of pressing titanium sponge into an electrode block, or evenly mixing the titanium sponge with an intermediate alloy and/or a metal as an alloy element and then pressing for the formation of the electrode block, welding the pressed electrode block into a cylindrical electrode and smelting the cylindrical electrode by adopting vacuum consumable electro-arc for the formation of a cylindrical cast ingot; peeling the obtained cylindrical cast ingot, then performing 90-180min heat preservation at a temperature of 800 to 850 DEG C, increasing the temperature to 950 to 1050 DEG C for 180-420min heat preservation and forging the cast ingot into a rectangular intermediate billet after the forging and drawing of one heating number; and finally performing hot-rolling and cogging on the obtained intermediate billet for the formation of the titanium plate billet. With the adoption of the method for preparing the titanium plate billet, the operation is convenient and the obtained titanium plate billet is small in thickness tolerance and good in surface quality.
Description
Technical field
The present invention relates to a kind of preparation method of titanium slab.
Background technology
In the titanium and titanium alloy material, titanium plate/volume output accounts for about 80% of total processing capacity, is widely used in the industrial circles such as Aeronautics and Astronautics, weapons, petrochemical industry, salt manufacturing, chlor-alkali, hydrometallurgy, medical treatment, papermaking, plating and electrolysis.
The method of domestic production titanium (or titanium volume) slab has two kinds at present: the one, and adopt and forge, the method mainly is first titanium sponge or the useless titanium material of recovery to be pressed into electrode block, then the electrode block assembly unit is welded into electrode bar, the titanium electrode bar that welding is good forms cylindrical titanium ingot at last through 2-3 melting in the vacuum consumable arc-melting stove, the titanium ingot is through time heating of a plurality of fire and forging, and being prepared at last the cross section is rectangular slab.The 2nd, adopt die casting, namely adopt vacuum consumable skull melting or electronics Cold Hearth Melting then directly to pour into the production method of titanium slab, the method is with titanium sponge or used titanium material extruding or is welded into columnar electrode, then in the vacuum consumable skull crucible, the titanium electrode is carried out melting, titanium solution is poured into a mould in the titanium slab casting mould, die sinking can obtain the titanium slab after the cooling again.
Adopting the forging mode is the present domestic topmost titanium slab mode of production.When adopt forging the titanium slab that methods produce, slab thickness allowance control difficulty is so that during the hot rolling of follow-up titanium plate or titanium volume, template and dimension control be difficulty relatively.Simultaneously, the fold that forging process produces, the surface quality that defects i.e.cracks also can have a strong impact on the subsequent hot rolled coiled sheet make the serious surface quality defects such as being pressed into appears in the hot-rolled sheet coil surface, pit, wood grain, scratch, pipe.In addition because the large and surperficial forging defect of slab thickness difference exists, also so that steel slab surface when clearing up milling amount large, seriously reduced the slab lumber recovery; Forging times is many in addition, and energy consumption is large, and production efficiency is low, has reduced economic benefit.Forge link although adopt the die casting mode can reduce slab, because investment is large, and be subjected to the technical equipment conditional request high, so that the die casting mode is produced the method for titanium slab is still immature at home, seldom use.
Summary of the invention
The objective of the invention is to overcome existing slab preparation method's deficiency, a kind of preparation method of titanium slab is provided.The method is easy to operate, and the titanium slab thickness tolerance that obtains is little, and surface quality is good.
The present inventor finds through research, should be cylindrical after the titanium electrode adopts vacuum consumable arc-melting, to obtain cylindrical ingot casting and forge through a fire time that to be forged into the cross section after pulling out be rectangular intermediate blank, and intermediate blank carried out hot rolling cogging, it is little to access titanium slab thickness tolerance, the titanium slab that surface quality is good, thus the present invention finished
That is, the invention provides a kind of preparation method of titanium slab, wherein, the method may further comprise the steps:
1) titanium sponge is pressed into electrode block, perhaps be pressed into electrode block with titanium sponge with as the intermediate alloy of alloying element and/or metal mixed after evenly, the electrode block of compacting is welded into cylindrical electrode, this cylindrical electrode is adopted vacuum consumable arc-melting, obtain cylindrical ingot casting;
2) with step 1) in the cylindrical ingot casting that obtains through after stripping off the skin 800 ℃-850 ℃ insulations 90-180 minute, be warming up to again 950 ℃-1050 ℃ after insulation 180-420 minute, forge through a fire then that to be forged into the cross section after pulling out be rectangular intermediate blank;
3) with step 2) in the intermediate blank that obtains carry out hot rolling cogging, obtain the titanium slab.
In the present invention, the method by " forging+split rolling method " is produced the titanium slab, and the slab thickness tolerance that obtains is little, and surface quality is good, and the method has production efficiency height, simple to operate, the advantage such as production cost is low.
The specific embodiment
The invention provides a kind of preparation method of titanium slab, wherein, the method may further comprise the steps:
1) titanium sponge is pressed into electrode block, perhaps be pressed into electrode block with titanium sponge with as the intermediate alloy of alloying element and/or metal mixed after evenly, the electrode block of compacting is welded into cylindrical electrode, this cylindrical electrode is adopted vacuum consumable arc-melting, obtain cylindrical ingot casting;
2) with step 1) in the cylindrical ingot casting that obtains through after stripping off the skin 800 ℃-850 ℃ insulations 90-180 minute, be warming up to again 950 ℃-1050 ℃ after insulation 180-420 minute, forge through a fire then that to be forged into the cross section after pulling out be rectangular intermediate blank;
3) with step 2) in the intermediate blank that obtains carry out hot rolling cogging, obtain the titanium slab.
The method according to this invention, described titanium sponge can be this area titanium sponge commonly used.In the preferred situation, described titanium sponge is the titanium sponge of 0 grade and/or 1 grade.The titanium sponge of this 0 grade and 1 grade is well known in the art.
The method according to this invention, the particle diameter of described titanium sponge can be selected in wide scope, and in the preferred situation, the particle size range of described titanium sponge is 0.83-25.4mm, more preferably 0.83-12.7mm.
The method according to this invention, described is well known in the art as the intermediate alloy of alloying element and/or kind and the consumption of metal.Those skilled in the art can determine as the intermediate alloy of alloying element and/or kind and the consumption of metal according to will obtaining product, carry out proportioning according to the percentage by weight of each composition.
The method according to this invention describedly is pressed into the method for electrode block with titanium sponge, perhaps is pressed into the method for electrode block after evenly with titanium sponge with as the intermediate alloy of alloying element and/or metal mixed, can adopt the whole bag of tricks known in the field.For example can be pressed into electrode block at hydraulic press.
According to method of the present invention, adopt the condition of vacuum consumable arc-melting to comprise this cylindrical electrode: melting voltage 30-50V, melting electric current 10-40KA, stir current 5-25A, vacuum is less than 3Pa; Be preferably melting voltage 32-38V, melting electric current 15-35KA, stir current 8-20A, vacuum is less than 2Pa.
According to method of the present invention, in the preferred situation, the number of times that this cylindrical electrode is adopted vacuum consumable arc-melting is for repeatedly; More preferably this cylindrical electrode being adopted the number of times of vacuum consumable arc-melting is 2-3 time; Further preferably this cylindrical electrode being adopted the number of times of vacuum consumable arc-melting is 2 times.The concrete grammar of vacuum consumable arc-melting has been conventionally known to one of skill in the art, and the present invention does not repeat them here.
According to method of the present invention, in the preferred situation, with step 1) in the cylindrical ingot casting that obtains through after stripping off the skin 800 ℃-850 ℃ insulations 100-150 minute, insulation is 240-360 minute after being warming up to 980 ℃-1050 ℃ again, and being forged into the cross section after then time forging is pulled out through a fire is rectangular intermediate blank.
Above-mentioned once forging is pulled out the cylindrical ingot casting after the insulation to be placed on the forging machine and is carried out.Described forging machine is various forging machine known in the field.
The method according to this invention, the method comprises step 2) in the intermediate blank that obtains carry out hot rolling cogging, obtain the titanium slab.With step 2) in the intermediate blank that obtains can carry out hot rolling at big mill, the temperature of hot rolling can be selected in wide scope.Generally speaking, hot-rolled temperature can be 900-1000 ℃; In the preferred situation, hot-rolled temperature can be 920-960 ℃.
The method according to this invention, step 2) strips off the skin as well known in the art described in, refer to remove impurity layer such as the oxide layer on intermediate blank surface.Generally speaking, the described skin thickness of taking off is less than 5mm; In the preferred situation, the described skin thickness of taking off is 2-4mm.
The method according to this invention, the method also comprises step 3) in after the titanium slab cooling that obtains, remove base head and base tail.
The method according to this invention, the method can also comprise with the titanium slab behind above-mentioned removal base head and the base tail with milling machine mill descale after, make the titanium slab of given size.
By the following examples the present invention is described in detail, but the present invention is not limited in following embodiment.
Embodiment 1
(1) 0 grade of titanium sponge (be purchased from Zun Yi titanium industry company, particle size range is 0.83-25.4mm) being pressed into the cross section at the 80MN hydraulic press is fan-shaped electrode block, and the electrode block substance is 126 kilograms; Being welded into diameter in plasma welding chamber is the cylindrical titanium electrode of 835mm; Then pass through the secondary vacuum consumable arc-melting; Wherein, melting once voltage 36V, melting electric current 26.5KA, stir current 18A, vacuum is 2Pa; Secondary melts melting voltage 33V, melting electric current 32KA, and stir current 20A, vacuum is 1Pa.Being smelted into a diameter is that 1000mm, weight are 9.8 tons cylindrical ingot casting.After testing, the percentage by weight of the composition of ingot casting is Fe:0.03%, C:0.010%, N:0.005%, H:0.004%, O:0.063%, and surplus is titanium.
(2) the cylindrical ingot casting that obtains in the step (1) is rear 800 ℃ of insulations 150 minutes through strip off the skin (taking off skin thickness is 3mm), insulation is after 360 minutes after being warming up to 1050 ℃ again, carrying out time forging of a fire at 4500 tons of forging machines pulls out, forging is pulled out opens that to forge temperature be 970 ℃, 815 ℃ of final forging temperatures; Unidirectional pulling is of a size of the intermediate blank of 1000mm * 400mm to blank section length and width.
(3) intermediate blank that obtains in the step (2) is carried out hot rolling at big mill, rolling heating-up temperature is 950 ℃, is incubated after 200 minutes, is rolled into the titanium slab that the cross section length and width are of a size of 1060mm * 200mm.
(4) the good titanium slab of hot rolling in the step (3) is cooled to room temperature after, the titanium slab is removed base head and base tail through sawing, then uses the milling machine scale removal, being processed into sectional dimension is the titanium slab of 1050mm * 192mm.The titanium slab thickness tolerance that obtains is ± 3mm.
Embodiment 2
(1) 1 grade of titanium sponge (be purchased from Luoyang two Rui Wanji titanium industry company, particle size range is 0.83-25.4mm) being pressed into the cross section at the 80MN hydraulic press is semicircular electrode block, and the electrode block substance is 76 kilograms; Being welded into diameter in plasma welding chamber is the cylindrical commercial pure titanium titanium electrode of 470mm, then passes through the secondary vacuum consumable arc-melting; Wherein, melting once voltage 36V, melting electric current 15kA, stir current 8A, vacuum is 2Pa; Secondary melts melting voltage 37V, melting electric current 22KA, and stir current 8A, vacuum is 1Pa.Being smelted into a diameter is that 660mm, weight are 3 tons cylindrical ingot casting.After testing, the percentage by weight of the composition of ingot casting is that Fe:0.043%, C:0.015%, N:0.004%, H:0.007%, O:0.067%, surplus are titanium.
(2) the cylindrical ingot casting that obtains in the step (1) is rear 850 ℃ of insulations 120 minutes through strip off the skin (taking off skin thickness is 4mm), insulation is after 240 minutes after being warming up to 1000 ℃ again, carrying out time forging of a fire at 4500 tons of forging machines pulls out, 965 ℃ of temperature, 803 ℃ of final forging temperatures are forged in opening that forging is pulled out; Unidirectional pulling is of a size of the intermediate blank of 1000mm * 200mm to the section length and width.
(3) intermediate blank that obtains in the step (2) is carried out hot rolling at big mill, rolling heating-up temperature is 920 ℃, is incubated 120 minutes, is rolled into the titanium slab that the cross section length and width are of a size of 1060mm * 100mm.
(4) the good titanium slab of hot rolling in the step (3) is cooled to room temperature after, the titanium slab is removed base head and base tail through sawing, then uses the milling machine scale removal, being processed into sectional dimension is the titanium slab of 1050mm * 92mm.The titanium slab thickness tolerance that obtains is ± 3mm.
Embodiment 3
(1) 0 grade of titanium sponge (is purchased from Zun Yi titanium industry company, particle size range is 0.83-25.4mm), the Ti-32Mo alloy (is purchased from good sincere Rare Metals Materials Co., Ltd, particle mean size≤3mm) and nickel bits (are purchased from magnificent star Industrial Co., Ltd., impurity≤0.1%, after length≤15mm) mixes, being pressed into the cross section at the 80MN hydraulic press is semicircular electrode block, 61 kilograms of electrode block substances; Being welded into diameter in plasma welding chamber is the cylindrical TA10 alloy electrode of 470mm, then passes through the secondary vacuum consumable arc-melting; Wherein, melting once voltage 35.5V, melting electric current 15.5kA, stir current 8A, vacuum is 2Pa; Secondary smelting voltage 36V, melting electric current 22KA, stir current 10A, vacuum is 1Pa.Being smelted into a diameter is that 660mm, weight are 3 tons ingot casting.After testing, the percentage by weight of the composition of ingot casting is that Mo:0.28%, Ni:0.78%, Fe:0.07%, C:0.008%, N:0.007%, H:0.005%, O:0.053%, surplus are titanium.
(2) the cylindrical ingot casting that obtains in the step (1) is rear 850 ℃ of insulations 120 minutes through strip off the skin (taking off skin thickness is 4mm), insulation is after 360 minutes after being warming up to 980 ℃ again, carrying out time forging of a fire at 4500 tons of forging machines pulls out, 960 ℃ of temperature, 810 ℃ of final forging temperatures are forged in opening that forging is pulled out; Unidirectional pulling is of a size of the intermediate blank of 1000mm * 200mm to the section length and width.
(3) intermediate blank that obtains in the step (2) is carried out hot rolling at big mill, the rolling temperature that adds is 980 ℃, is incubated 120 minutes, is rolled into the titanium slab that the cross section length and width are of a size of 1060mm * 100mm.
(4) the good titanium slab of hot rolling in the step (3) is cooled to room temperature after, titanium is removed base head and base tail through sawing, then uses the milling machine scale removal, being processed into sectional dimension is the titanium slab of 1050mm * 92mm.The titanium slab thickness tolerance that obtains is ± 3mm.
Comparative Examples 1
Carry out according to the method among the embodiment 1, different is, the cogging hot rolling of step (3) is pulled out replacement by forging of another fire time, and concrete steps are as follows:
(1) 0 grade of titanium sponge (be purchased from Zun Yi titanium industry company, particle size range is 0.83-25.4mm) being pressed into the cross section at the 80MN hydraulic press is fan-shaped electrode block, and the electrode block substance is 126 kilograms; Being welded into diameter in plasma welding chamber is the cylindrical titanium electrode of 835mm; Then pass through the secondary vacuum consumable arc-melting; Wherein, melting once voltage 36V, melting electric current 26.5KA, stir current 18A, vacuum is 2Pa; Secondary melts melting voltage 33V, melting electric current 32KA, and stir current 20A, vacuum is 1Pa.Being smelted into a diameter is that 1000mm, weight are 9.8 tons cylindrical ingot casting.After testing, the percentage by weight of the composition of ingot casting is Fe:0.03%, C:0.010%, N:0.005%, H:0.004%, O:0.063%, and surplus is titanium.
(2) the cylindrical ingot casting that obtains in the step (1) is rear 800 ℃ of insulations 150 minutes through strip off the skin (taking off skin thickness is 3mm), insulation is after 360 minutes after being warming up to 1050 ℃ again, carrying out time forging of a fire at 4500 tons of forging machines pulls out, forging is pulled out opens that to forge temperature be 970 ℃, 815 ℃ of final forging temperatures; Unidirectional pulling is of a size of the intermediate blank of 1000mm * 400mm to blank section length and width.
(3) sending the intermediate blank that obtains in the step (2) back to heating furnace heats again, 970 ℃ of heating-up temperatures, be incubated 200 minutes, forge at 4500 tons of forging machines, opening and forging temperature is that 956 ℃, final forging temperature are 800 ℃, forges at last that to pull out as sectional dimension be the titanium slab of 1070mm * 210mm.
(4) the good titanium slab of hot rolling in the step (3) is cooled to room temperature after, the titanium slab is removed base head and base tail through sawing, then uses the milling machine scale removal, being processed into sectional dimension is the titanium slab of 1050mm * 192mm.The titanium slab thickness tolerance that obtains is ± 8mm.
Can find out by embodiment 1 and Comparative Examples 1, adopt the thickness deviation of the titanium slab that method of the present invention obtains obviously to be less than the thickness deviation of the titanium slab that obtains in the Comparative Examples 1, and surface quality be better than the titanium slab that obtains in the Comparative Examples 1.
Claims (6)
1. the preparation method of a titanium slab is characterized in that, the method may further comprise the steps:
1) titanium sponge is pressed into electrode block, perhaps be pressed into electrode block with titanium sponge with as the intermediate alloy of alloying element and/or metal mixed after evenly, the electrode block of compacting is welded into cylindrical electrode, this cylindrical electrode is adopted vacuum consumable arc-melting, obtain cylindrical ingot casting;
2) with step 1) in the cylindrical ingot casting that obtains through after stripping off the skin 800 ℃-850 ℃ insulations 90-180 minute, be warming up to again 950 ℃-1050 ℃ after insulation 180-420 minute, forge through a fire then that to be forged into the cross section after pulling out be rectangular intermediate blank;
3) with step 2) in the intermediate blank that obtains carry out hot rolling cogging, obtain the titanium slab.
2. the condition of the vacuum consumable arc-melting method according to claim 1, wherein, step 1) comprises: melting voltage 30-50V, and melting electric current 10-40KA, stir current 5-25A, vacuum is less than 3Pa.
3. the particle size range of the titanium sponge method according to claim 1, wherein, step 1) is 0.83-25.4mm.
4. method according to claim 1, wherein, step 1) this cylindrical electrode being adopted the number of times of vacuum consumable arc-melting is 2-3 time.
5. the hot-rolled temperature method according to claim 1, wherein, step 3) is 900-1000 ℃.
6. the described method of any one according to claim 1-5, wherein, the method also comprises, with step 3) in after the titanium slab cooling that obtains, remove base head, base tail and carry out scale removal and process.
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| CN2011102819023A CN103008978A (en) | 2011-09-21 | 2011-09-21 | Method for preparing titanium plate billet |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103215553A (en) * | 2013-04-27 | 2013-07-24 | 西部钛业有限责任公司 | Method for preparing high-purity titanium plate for use as target |
| CN106346199A (en) * | 2016-08-31 | 2017-01-25 | 宝鸡市永盛泰钛业有限公司 | Method for manufacturing titanium alloy lower protective plate of automobile bottom plate |
| CN107916352A (en) * | 2017-11-17 | 2018-04-17 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of method for manufacturing jewellery |
| CN109226262A (en) * | 2018-11-09 | 2019-01-18 | 瓯锟科技温州有限公司 | A kind of steel titanium composite panel material and preparation method thereof |
| CN113528872A (en) * | 2021-07-26 | 2021-10-22 | 攀钢集团攀枝花钛材有限公司江油分公司 | Preparation method of residual titanium plate blank combined package melting assembly welding remelting titanium ingot |
| CN113862513A (en) * | 2021-09-09 | 2021-12-31 | 新疆湘润新材料科技有限公司 | Low-cost high-elasticity pure titanium strip coil for hanger and preparation method thereof |
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| CN109226262A (en) * | 2018-11-09 | 2019-01-18 | 瓯锟科技温州有限公司 | A kind of steel titanium composite panel material and preparation method thereof |
| CN113528872A (en) * | 2021-07-26 | 2021-10-22 | 攀钢集团攀枝花钛材有限公司江油分公司 | Preparation method of residual titanium plate blank combined package melting assembly welding remelting titanium ingot |
| CN113862513A (en) * | 2021-09-09 | 2021-12-31 | 新疆湘润新材料科技有限公司 | Low-cost high-elasticity pure titanium strip coil for hanger and preparation method thereof |
| CN113862513B (en) * | 2021-09-09 | 2022-05-03 | 新疆湘润新材料科技有限公司 | Low-cost high-elasticity pure titanium strip coil for hanger and preparation method thereof |
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Application publication date: 20130403 |