Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21B—ROLLING OF METAL
  • B21B9/00—Measures for carrying out rolling operations under special conditions, e.g. in vacuum or inert atmosphere to prevent oxidation of work; Special measures for removing fumes from rolling mills
• • 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
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
  • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
  • Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

Definitions

• the present invention relates to a method for producing a rolled titanium product.
• titanium reacts with oxygen in the air to form an oxide film with a depth of 10) U on its surface. Therefore, even when titanium is hot-rolled, the oxide film is formed on the surface of the red-hot titanium.
• this titanium oxide has poor ductility, and if it is rolled as it is, there arises a problem that titanium cracks. Therefore, conventionally, by combining the rolling speed and rolling temperature in various materials, it is to prevent the cracking 0
• the present invention provides a method of manufacturing a rolled titanium product that can remove an oxide film on the surface of the titanium material and eliminate cracks and the like during rolling. Aim.
• a method for producing a rolled titanium product of the present invention comprises: contacting a heated titanium material with a fluorine-based gas to form a fluoride film on the surface of the titanium material; Immediately before removing the fluoride film generated on the titanium material surface, the titanium material is rolled to form a rolled product.
• a titanium material in a heated state is subjected to, for example, a fluorine-based gas atmosphere before rolling. It is brought into contact with a fluorine-based gas by passing through.
• a fluorine-based gas atmosphere for example, a fluorine-based gas atmosphere
• the oxide film formed on the surface of the titanium material formed by the reaction with oxygen in the air is removed by the fluorine-based gas to clean the surface of the titanium material, and at the same time, a fluoride film is formed on the surface of the titanium material .
• This fluoride is stable, and adsorption of oxygen-forming element-forming element to the titanium material base material is prevented until the subsequent removing step.
• the fluoride film on the titanium material surface is decomposed and removed to expose the titanium material material. In this way, no oxide film is formed on the surface of the titanium material during rolling of the titanium material, and the rolling speed is high and no oxide film is formed during the rolling process. Cracks are prevented.
• the present invention will be described in detail.
• the fluorine-based gas used in preparation of the present invention F 3, BF 3, CF 4, HF, at least one fluorine source component selected from SF ,, F s N, the inert gas and the like It means what was made.
• fluorine source components NF 8 is the most convenient and practical in terms of reactivity, handleability, and the like.
• the method for producing a rolled titanium material product of the present invention is to pass a titanium material in a heated state before rolling, for example, through the above-mentioned fluorine-based gas atmosphere to thereby form a fluorine-based gas. Contact and treat the surface of titanium material. Then, immediately after the rolling, H 2 gas or the like is sprayed to remove the fluoride film from the surface of the titanium material to expose the titanium material, and then rolled to obtain a rolled product.
• the concentration of the fluorine source components 3 such as NF in such fluorine-based gas for example, 1000 ⁇ 100000P pm, is the preferred are preferred over 20000 ⁇ 7 0000 p pm> is 30000 ⁇ 50000Ppm.
• the passage time in such a fluorine-based gas atmosphere may be selected appropriately according to the type, dimensions, heating temperature, etc. of the titanium material. Is a few minutes to tens of minutes.
• a gas treatment chamber 2 and two upper and lower H 2 gas sprays are provided before a plurality of sets of rolling rolls 4.
• Nozzle 3 is provided.
• the high-temperature thick plate-like titanium material 1 sent out from a heating furnace passes through the gas processing chamber 2 and between the nozzles 3 and is then rolled by the rolling rolls 4. become.
• a gas introduction pipe 5 and an exhaust pipe 6 are inserted into the extermination 2a, and a fluorine-based gas, for example, NF, N A mixed gas of 2 is introduced.
• the introduced fluorine-based gas is searched by a fan 7 rotated by a motor 8 to form a uniform fluorine-based gas atmosphere in the room. Further, the inside of the gas processing chamber 2 is kept at a low temperature by the titanium material 1 passing therethrough. When the titanium material passes through such a gas processing chamber 2, an oxide film formed by reacting with oxygen in the air is removed from the surface of the titanium material. That, NF S gas generates a fluorine becomes the active group to a high temperature, thereby simultaneously removing the organic titanium material surface, the contamination of the inorganic reaction hydrofluoric ⁇ is an oxide such as titanium oxide titanium material surface Then, an extremely thin fluoride film is formed on the surface of the titanium material.
• the oxide film on the surface of the titanium material is converted into a fluoride film, and the 0, adsorbed on the surface is also removed.
• such off Kkamaku is, 0 2, H 2, H 2 0 is a case stable not, form the oxide film to the easy to the titanium material fabric up blowing H 2 gas in the rear gun to prevent formation and 0 2 adsorption.
• a fluorinated film is formed on the inner surface of the outer layer 2a at the first stage, and the NF treatment on the subsequent outer shell ⁇ surface is performed by the film. 3 Gas based damage will be prevented.
• the titanium material 1 is rolled by the rolling roll 4. Since this rolling speed is high, an oxide film is not formed again on the surface of the titanium material on the surface through which several rolling rolls 4 pass.
• nitrogen gas may be blown to the titanium material 1 in the latter half of the rolling process.
• 9 is a hood.
• the titanium material is passed through a fluorine-based gas atmosphere before rolling the titanium.
• a passive film of oxide skin ⁇ the titanium material surface is changed to fluoride film, 0 thus coercive praise titanium material surface is performed, a time on the surface to its removal from the formation of the fluoride film ⁇ Even if there is a mistake, the fluoride film formed on the titanium material surface can protect the titanium material surface in good condition to prevent the palm and the titanium oxide material from being oxidized again.
• This fluoride film is decomposed and removed immediately before the rolling, so that the titanium material is exposed, so that cracks during the rolling of the titanium material can be eliminated.
• the drawing is an explanatory view of an apparatus used in one embodiment of the present invention.
• Titanium plank that is red hot in a heating furnace, 5 0 0 0 ppm including the NF a After it passed through a gas treatment chamber under N s gas atmosphere having uniformly sprayed with H 2 gas from the nozzle just prior to rolling, and rolled with the rolling roller, and a titanium thin plate. There was no crack in the obtained titanium sheet.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Metal Rolling (AREA)
• Catalysts (AREA)
• Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)

Priority Applications (3)

Applications Claiming Priority (2)

Publications (1)

Family

ID=18078479

Family Applications (1)

Country Status (6)

Citations (2)

Family Cites Families (4)

• 1990
  • 1990-11-20 JP JP2316562A patent/JP2914524B2/ja not_active Expired - Fee Related
• 1991
  • 1991-11-20 KR KR1019920701270A patent/KR100222315B1/ko not_active Expired - Fee Related
  • 1991-11-20 DE DE69125705T patent/DE69125705T2/de not_active Expired - Lifetime
  • 1991-11-20 WO PCT/JP1991/001598 patent/WO1992008556A1/ja not_active Ceased
  • 1991-11-20 EP EP92902492A patent/EP0511411B1/en not_active Expired - Lifetime
  • 1991-11-20 US US07/852,218 patent/US5207845A/en not_active Expired - Lifetime

Patent Citations (2)

Non-Patent Citations (1)

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