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1. 发明专利

JPH09271807A PURE TITANIUM BILLET AND ITS HOT ROLLING METHOD 失效
公开(公告)号：JPH09271807A
公开(公告)日：1997-10-21
申请号：JP8037596
申请日：1996-04-02
申请人： NIPPON STEEL CORP
发明人： TAKAHASHI KAZUHIRO , TAKAYAMA ISAMU , KAWAKAMI SATORU , YAMAMOTO SATOSHI , KIZAKI MASAYUKI
IPC分类号： B21B3/00 , B21J1/02
摘要： PROBLEM TO BE SOLVED: To improve a yield by reducing the removing quantity (cutting quan tity) of the hardened layer of a pure titanium billet manufactured by hot work ing, and making a flaw occurring at the hot rolling shallow. SOLUTION: Out of hardened layers existing in the surface layer part of the pure titanium billet which is bloomed in a hot state or forged, by removing an extreme surface layer part whose Vickers hardness is more than 300 and by performing hot rolling to a wire rod, leaving the hardened layer with Vickers hardness 200 to 300 on the billet surface, there is no possibility that the surface layer is cracked and a deep flaw is formed. And, since surface strength in the hot state is comparatively high, the flaw occurring caused by a pushed in deposition from roll and guide can be made shallow. Therefore, the cutting quantity of the billet and that of the wire rod can be reduced.

2. 发明专利

JPH09268357A METHOD FOR HEATING CYLINDRICAL BILLET OF PURE TITANIUM AND TITANIUM ALLOY 失效
公开(公告)号：JPH09268357A
公开(公告)日：1997-10-14
申请号：JP8037696
申请日：1996-04-02
申请人： NIPPON STEEL CORP
发明人： TAKAHASHI KAZUHIRO , KAWAKAMI SATORU , YAMAMOTO SATOSHI , NAKAMURA YOSHITAKA
IPC分类号： B21B3/00 , C22F1/18
摘要： PROBLEM TO BE SOLVED: To provide a heating method by which the bend of the billet of a pure titanium and a titanium alloy can be reduced at the time of subjecting them to rolling into a bar, a wire or a tubular material. SOLUTION: In a heating stage before rolling, using a walking beam type heating furnace rotatively carrying a cylindrical billet with an axis as the center, it is rotated at the rotating speed of 6 to 36 deg./min for one or more rotations at the holding temp. of 680 to 850 deg.C as for pure titanium, 780 to 900 deg.C as for an α+βtype alloy and 950 to 1150 deg.C as for α or β type alloy, by which the bend of the billet present from the first can be reduced. Moreover, its temp. is raised for

3. 发明专利

JPH08300044A WIRE ROD CONTINUOUS STRAIGHTENING DEVICE 失效
公开(公告)号：JPH08300044A
公开(公告)日：1996-11-19
申请号：JP10420395
申请日：1995-04-27
申请人： NIPPON STEEL CORP
发明人： TAKEUCHI NOBORU , OKAMOTO MANABU , YAMAMOTO SATOSHI
IPC分类号： B21D3/00 , B21D3/05 , B21D3/12 , B21F1/02
摘要： PURPOSE: To straighten bend of hard to work wire rod such as titanium and titanium alloy in good efficiency, good yield and good precision. CONSTITUTION: A wire rod S sent from an uncoiler 1 is roughly straightened by a rough straightening machine 2 and is passed through an incoming side tension adding roll 4, incoming side energizing roll 5, outgoing side energizing roll 6 and outgoing-side tension adding roll 7. While tension is added to the wire rod S between the incoming side tension adding roll 4 and outgoing side tension adding roll 7, the wire rod S is energized/heated between the incoming side energizing roll 5 and outgoing side energizing roll 6 while tension is uniformly added in the longitudinal direction. The wire rod S given with a prescribed elongation is cooled between the outgoing side energizing roll 6 and outgoing side energizing roll 7 while tension is added, straightening is executed with contraction and tension due to cooling. The wire rod S straightened is cut to product length by a cutting device 9.

4. 发明专利

JPH0890074A METHOD FOR STRAIGHTENING TITANIUM AND TITANIUM ALLOY WIRE 失效
公开(公告)号：JPH0890074A
公开(公告)日：1996-04-09
申请号：JP22524494
申请日：1994-09-20
申请人： NIPPON STEEL CORP
发明人： YAMAMOTO SATOSHI , KUSANO AKIHIKO , TAKEUCHI NOBORU , KIMURA KINICHI
IPC分类号： B21D3/00 , B21D3/12 , B23P15/00 , C22F1/00 , C22F1/18
摘要： PURPOSE: To manufacture a titanium and titanium alloy bar at a low cost with improved total yield by suppressing the generation of cracks and flaws to obtain a product of stable dimensional precision in the process to straighten a titanium and titanium alloy wire. CONSTITUTION: In a method where tension is applied to the bent titanium or titanium alloy wire in a warm or hot condition to be straightened, the titanium wire is straightened under the condition that the product of 6 and the value of T subtracted by 400 is >=100 whereas the titanium alloy wire is straightened under the condition that the product of ε and the value of T subtracted by 500 is >=200, where T is the straightening temperature ( deg.C), and εis the straightening elongation (%).

5. 发明专利

JPH06184683A TITANIUM ALLOY WIRE SUITABLE FOR PRODUCING VALVE AND ITS PRODUCTION 失效
公开(公告)号：JPH06184683A
公开(公告)日：1994-07-05
申请号：JP8891293
申请日：1993-04-15
申请人： NIPPON STEEL CORP
发明人： TAKAYAMA ISAMU , YAMAMOTO SATOSHI , KIZAKI MASAYUKI
IPC分类号： C22C14/00 , C22F1/00 , C22F1/18 , F01L3/02
摘要： PURPOSE:To realize a titanium alloy material applicable to an automotive engine on the market by forming the microstructure of alpha+beta titanium alloy wire rod into an acicular crystal structure and regulating the width of the crystals and the size of the old beta grains into specified value. CONSTITUTION:The microstructure of alpha+beta type titanium alloy wire rod is formed of an acicular alpha crystal structure, and the width of the alpha crystals is regulated to 1 to 4mum and the size of the old beta grains to

6. 发明专利

JPH01122614A MANUFACTURE OF LONG-SIZED DOUBLE TUBE 失效
公开(公告)号：JPH01122614A
公开(公告)日：1989-05-15
申请号：JP28062387
申请日：1987-11-06
申请人： NIPPON STEEL CORP
发明人： YAMAMOTO SATOSHI
IPC分类号： B21C37/06 , B21D26/033 , B21D26/041 , B21D26/051
摘要： PURPOSE:To improve the bonding quality and to obtain the long-sized double tube by stratifying an outer pipe on a cooled and diametrically contracted inner tube, subsequently repeatedly contracting the diameter of the outer tube by pressure of liquid at high temperatures and removing the liquid, then, returning the temperature of the inner tube down to the room temperature. CONSTITUTION:In the double tube wherein the outer tube 1 and the inner tube 2 are arranged in layers, the inner tube 2 is cooled by cooling water, etc., in advance to contract the diameter D2 of the inner tube down to D1. Then, the diameter of the outer tube 1 is contracted through high temperature liquid 6, the inner diameter D0 of the outer tube is deformed elastically and plastically to contract the inner diameter down to D3. Continuously liquid 6 at a high temperature is moved to a neighboring outer tube part in the axial direction and the outer tube 2 repeatedly is contracted in diameter all over the length of the double tube. Finally, the refrigerant in the inner tube 2 is removed to strongly bond the outer tube 1 and the inner tube 2. Hereby, the interfacial contact pressure increases and the workability to form the double tube reduces. Accordingly, the bonding quality of the double tube is improved and the double tube is lengthened.

7. 发明专利

JPS61283418A PRODUCTION OF DIFFERENT-DIAMETER PIPE 失效
公开(公告)号：JPS61283418A
公开(公告)日：1986-12-13
申请号：JP12545985
申请日：1985-06-10
申请人： NIPPON STEEL CORP
发明人： YAMAMOTO SATOSHI , FUJII KEISUKE , YAMAMOTO TAMOTSU , HIRONAKA KATSUTOSHI , NAGASHIMA SHOJI
IPC分类号： B21C37/16
摘要： PURPOSE:To form a different-diameter pipe at a uniform reduction ratio and low cost by cold working a partially thick-walled different-diameter pipe stock having a specified inside diameter between split 2-stage dies having a parallel part and valley part and a plug having a parallel part and valley part. CONSTITUTION:The raw pipe 4 having the inside diameter constant in the longitudinal direction and having the thick-walled part 3 in the middle is passed between the slidable dies consisting of the front die 6 and the rear die 7 and the slidable plug 8. The front thin-walled part of the raw pipe 4 is rolled down by the parallel part 17 of the rear die 7 and the front parallel part 19 of the plug 8 to form a front thin-walled part 2. The thick-walled part 3 of the pipe 4 is then rolled down by the parallel part 17 and is packed into the valley part 21 of the plug 8. The dies and plug 8 are slid to pack the thick-walled part 3 into the die valley part 18. The die 6 is split by removing bolts 10 and the rear thin-walled part of the pipe 4 is rolled down by the die parallel part 17 and the plug parallel part 19 to form the rear thin-walled part, by which the different-diameter pipe 1 having the specified inside diameter and the thick wall partially in the middle region is obtd.

8. 发明专利

JPS61123415A Production of different-diameter pipe 失效
标题翻译：生产不同直径的管
公开(公告)号：JPS61123415A
公开(公告)日：1986-06-11
申请号：JP24195184
申请日：1984-11-16
申请人： Nippon Steel Corp
发明人： YAMAMOTO SATOSHI , FUJII KEISUKE
IPC分类号： B21C37/16
摘要： PURPOSE: To make production of a different-diameter pipe having a longitudinally constant inside diameter or outside diameter and a thick-walled intermediate part with less stages by inserting a blank pipe which is a steel pipe into a die having a parallel part and trough part, putting a plug having parallel parts in the front and rear part and the trough part in the central part into said die and rolling down the blank pipe between said plug and die.
CONSTITUTION: The blank pipe 14 which is the steel pipe is inserted into the die 7 having the parallel part 17 and the trough part 18 and the mouthed part 15 of the pipe 14 is gripped by a jaw 12. The plug 8 having the front parallel part 19 and the rear parallel part 20 and having the trough part at the intermediate thereof is then inserted into the blank pipe 14. The jaw 12 is then pulled forward to roll down the outside diameter side and the inside diameter side of the pipe 14 by the front parallel part 19 of the plug and the parallel part 17 of the die 7, thereby forming a thin-walled part 2 of the different-diameter pipe. The thick-walled part of the blank pipe is then rolled down by the intermediate trough part of the plug 8 and the parallel part 17 of the die to form a thick-walled part 3 of the different- diameter pipe. The thick-walled part 3 is packed into the trough part 18 of the die, by which the different-diameter pipe having the uniform inside diameter and the large outside diameter in the central part is produced. The different-diameter pipe having the uniform outside diameter and the partially small inside diameter is similarly produced.
COPYRIGHT: (C)1986,JPO&Japio
摘要翻译：目的：通过将作为钢管的坯管插入具有平行部分和槽部的模具中，制造具有纵向恒定的内径或外径的不同直径的管和具有较少台阶的厚壁中间部将具有平行部分的插头在中间部分的前部和后部部分和槽部分放入所述模具中，并且将所述插头和管芯之间的空白管道向下滚动。构成：作为钢管的空管14被插入具有平行部17和槽部18的管芯7中，并且管14的口部15被钳口12夹紧。插塞8具有前部平行部分19和后平行部分20并且在其中间处具有槽部分然后被插入坯管14中。然后将颚板12向前拉以将管14的外径侧和内径侧向下滚动，插头的前平行部分19和模具7的平行部分17，从而形成不同直径管的薄壁部分2。然后，空管的厚壁部分由插头8的中间槽部分和模具的平行部分17卷起，以形成不同直径的管道的厚壁部分3。厚壁部3被填充到模具的槽部18中，通过该凹部18产生中心部具有均匀的内径和大的外径的不同直径的管。类似地制造具有均匀外径和部分小内径的不同直径的管。

9. 发明专利

JPH08206762A WIRE ROD STRAIGHTENING DEVICE 失效
公开(公告)号：JPH08206762A
公开(公告)日：1996-08-13
申请号：JP1730195
申请日：1995-02-03
申请人： NIPPON STEEL CORP
发明人： TAKEUCHI NOBORU , OGURO HARUO , OKAMOTO MANABU , YAMAMOTO SATOSHI , KUSANO AKIHIKO
IPC分类号： B21C51/00 , B21D3/00 , B21D3/12 , B21F1/02 , B21F11/00
摘要： PURPOSE: To stably produce a linear wire rod having good dimensional precision by straightening bends of wire rod of hard-to-work metal of titanium alloy, etc., with high precision. CONSTITUTION: A wire rod S is held with a fixed clamp 6 and moving clamp 8, while driving a tension cylinder 9 and imparting tension force to the wire rod S, the wire rod S is heated through electrodes 14, 15 attached to chucks 10, 11. When the temp. of wire rod S detected by a thermometer 16 is turned to the prescribed value, the temp. is maintained, after an elongation percentage is turned to the prescribed value, the wire rod S is cooled with cooling devices 19, 20. After the temp. of wire rod S is turned to the prescribed value, the chucks 10, 11 are released.

10. 发明专利

JPH07269316A LOW STRENGTH TITANIUM ALLOY MADE INTAKE ENGINE VALVE 失效
公开(公告)号：JPH07269316A
公开(公告)日：1995-10-17
申请号：JP6397894
申请日：1994-03-31
申请人： NIPPON STEEL CORP
发明人： YAMAZAKI TATSUO , TAKAYAMA ISAMU , YAMAMOTO SATOSHI
IPC分类号： F01L3/02 , C22C14/00
摘要： PURPOSE:To provide an engine valve which is right and having good workability and cutting property by forming hardening layer which consists of low strength titanium alloy whose tension strength in a specified temperature is a specified value or more and tension strength in a normal temperature is the specified value and less, and which is formed in such a way that oxygen is solved on at least the surface of the face part and the stem part of a valve. CONSTITUTION:An intake engine valve consists of an umbrella part 1 having a face part 4, a stem part 2, a stem end part 3. The intake engine valve has a hardening layer which is formed of low titanium alloy whose tension strength in 30 deg.C is 10kgf/mm , and tension strength in a normal temperature is 80kgf/mm and less, and which is formed in such a way that oxygen is solved on at least the surface of the face part 4 and the stem part 2. In this intake engine valve, micro-texture is formed of an equi-ated needle-like alpha crystal of 6mum or more, or mixed texture consisting of equi-ated alpha crystal and needle-like alpha crystal. hardened layer having 600Hv is 5mum or more and loss then 20mum. It is thus possible to reduce a weight and improving workability.

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