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1. 发明专利

JPS62284055A BATCH HEAT TREATMENT OF TITANIUM AND TITANIUM ALLOY 失效
公开(公告)号：JPS62284055A
公开(公告)日：1987-12-09
申请号：JP12722086
申请日：1986-06-03
申请人： NIPPON STEEL CORP
发明人： YAMADA TADAYOSHI , MIURA EIJI , DOI MASAHARU
IPC分类号： C22F1/18 , C22F1/00
摘要： PURPOSE:To manufacture a Ti or Ti alloy product having superior surface properties and no problem of quality by deciding the time when evacuation is switched over to the introduction of an inert gas during the batch heat treatment of Ti or a Ti alloy. CONSTITUTION:Ti or a Ti alloy is put in a batch furnace for batch heat treatment, the furnace is evacuated and the temp. of the furnace is set at a heating temp. for vaporization. When the maximum temp. of the material attains 380-480 deg.C, the temp. of the furnace is changed over to a heat treatment temp. After the lapse of >=20min, evacuation is stopped and an inert gas is introduced.

2. 发明专利

JPS609668A TOOL FOR DRAWING PIPE 失效
公开(公告)号：JPS609668A
公开(公告)日：1985-01-18
申请号：JP11517383
申请日：1983-06-28
申请人： NIPPON STEEL CORP
发明人： ISHIZU NOBORU , KOYANAGI SHIGENORI , HIRATA YOUJI , DOI MASAHARU
IPC分类号： B25B27/02 , B25B27/06

3. 发明专利

JPS5893511A DRAWBENCH FOR MANUFACTURING DIFFERENT-DIAMETER TUBE 失效
公开(公告)号：JPS5893511A
公开(公告)日：1983-06-03
申请号：JP19081181
申请日：1981-11-30
申请人： NIPPON STEEL CORP
发明人： DOI MASAHARU , FUJII KEISUKE
IPC分类号： B21C1/00 , B21C3/02 , B21C37/16
摘要： PURPOSE:To obtain a drawbench which allows two front and rear dies to slide in a drawing direction and to be taken out while moving each die in the specific range of a plug having a parallel part and a tapered part, and performs drawing with good size precision through one operation and form plural thick parts. CONSTITUTION:A drawbench for drawing a blank tube 14 into a different- diameter tube 1 consists of a die stand 4, gap leaving member 5, front and rear dies 6 and 7, plug 8, and jaw 12. The two-stage die has a valley part 18 of the same and in the same shape with the thick part 3 of the tube 1 and is held in the stand 4 while held by the member 5 at distance (d) equal to the thick part 3 from a stopper 9. The plug 8 has a parallel part 19 and a rear tapered part 20 and is inserted into a die hold and fixed by a lever 13. The member 5 and die 6 are fixed detachably by bolts 11 and 10, and the die 6 is a separate type. After the tube is moved to left through the jaw 12 to form a thin part 2, the member 5 is removed and the two-stage die is slid to left to form the thick part 3; after the bolt 10 is removed, a rear thin part is formed and the die 6 is extruded.

4. 发明专利

JPS6312692B2 失效
公开(公告)号：JPS6312692B2
公开(公告)日：1988-03-22
申请号：JP19081281
申请日：1981-11-30
申请人： NIPPON STEEL CORP
发明人： DOI MASAHARU , FUJII KEISUKE
IPC分类号： B21C1/00 , B21C3/02 , B21C37/16

5. 发明专利

JPS5893512A MANUFACTURE OF DIFFERENT-DIAMETER TUBE 失效
公开(公告)号：JPS5893512A
公开(公告)日：1983-06-03
申请号：JP19081281
申请日：1981-11-30
申请人： NIPPON STEEL CORP
发明人： DOI MASAHARU , FUJII KEISUKE
IPC分类号： B21C1/00 , B21C3/02 , B21C37/16
摘要： PURPOSE:To manufacture a different-diameter tube having plural thin parts with high precision through one drawing operation by running a tube through a split type two-stage die which has a valley part of the same size and in the same shape with a different-diameter thick part and is slidable and a plug having a parallel part and a rear tapered part. CONSTITUTION:When a blank tube 14 is passed through a die hole and a pointing part 15 is gripped by a jaw 12 and pulled to left, the tube 14 and a plug 8 both enter the die hole. When the boundary between plug parallel and tapered parts 19 and 20 come close to the right end of the bearing land 16 of a front die 6 on its right side, the jaw 12 is moved to left after the right end of a plug lever 13 is fixed and the jaw 2 is stopped after a thin part 2 is formed. Then when the jaw is moved to left except a gap leaving member 5, dies 6 and 7 slide on the internal surface of a sand to form a thick part 3. When the dies abut on a stopper 9, the jaw is stopped and the bolt of the die 6 is removed to move the jaw to left, forming a thin part 2' while extruding the die 6.

6. 发明专利

JPS6455367A MANUFACTURE OF THICK PURE-TITANIUM WELDED TUBE WITH HIGH DUCTILITY 失效
公开(公告)号：JPS6455367A
公开(公告)日：1989-03-02
申请号：JP21126687
申请日：1987-08-27
申请人： NIPPON STEEL CORP
发明人： YOSHIMURA HIROBUMI , KIMURA KINICHI , DOI MASAHARU
IPC分类号： C22F1/18 , C22F1/00
摘要： PURPOSE:To provide high ductility to the undermentioned welded tube and to absorb expansion due to the increase in the internal pressure of the tube, by subjecting a thick pure-Ti seam-welded tube to heat treatment at a temp. in a specific range according to tube thickness and tube outside diameter. CONSTITUTION:A tube prepared by forming a strip-like Ti material into a pipe and then seam-welding the above is subjected to heat treatment in which holding is applied for a proper length of time in a temp. range satisfying an inequality according to the thickness of pipe [t(mm)] and the outside diameter of pipe [D(mm)], where T means treating temperature ( deg.C). By this method, the structure of the above tube is formed into that of large crystalline grains, by which high ductility is provided. Accordingly, the pure-Ti welded tube can be applied even to a vaporizer having large shellside-tubeside pressure difference, etc.

7. 发明专利

JPS6312691B2 失效
公开(公告)号：JPS6312691B2
公开(公告)日：1988-03-22
申请号：JP19081181
申请日：1981-11-30
申请人： NIPPON STEEL CORP
发明人： DOI MASAHARU , FUJII KEISUKE
IPC分类号： B21C1/00 , B21C3/02 , B21C37/16

8. 发明专利

JPS62202068A MANUFACTURE OF HIGH DUCTILITY WELDED PIPE OF PURE TITANIUM 失效
公开(公告)号：JPS62202068A
公开(公告)日：1987-09-05
申请号：JP4196086
申请日：1986-02-28
申请人： NIPPON STEEL CORP
发明人： YOSHIMURA HIROBUMI , KIMURA KINICHI , DOI MASAHARU
IPC分类号： C22F1/18 , C22F1/00
摘要： PURPOSE:To provide high ductility to a welded pipe obtd. by forming a beltlike Ti material into a pipe and seam-welding the joint by heat treating the welded pipe at a prescribed temp. according to the thickness and outside diameter of the pipe. CONSTITUTION:A beltlike Ti material is formed into a pipe and the joint is seam-welded to obtain a welded pipe having 0.008-0.08 ratio of t/D [t is the thickness (mm) of the pipe and D is the outside diameter (mm) of the pipe]. The welded pipe is heat treated at a temp. T of [-2.5X10 (t/D)+800]-900 deg.C.

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