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1. 发明专利

JPH09143650A PRODUCTION OF ALPHA PLUS BETA TITANIUM ALLOY MATERIAL REDUCED IN INTRAPLANE ANISOTROPY 失效
公开(公告)号：JPH09143650A
公开(公告)日：1997-06-03
申请号：JP29554495
申请日：1995-11-14
申请人： NIPPON KOKAN KK
发明人： FUKAI HIDEAKI , IZAWA TORU , KOBAYASHI TAKAYUKI
IPC分类号： B21B3/00 , B21B1/26 , B21B39/18 , C22F1/00 , C22F1/18
摘要： PROBLEM TO BE SOLVED: To produce an alpha plus beta titanium alloy material reduced in intraplane anisotropy by controlling the cross ratio. SOLUTION: In the case where the final rolling direction of hot rolling is the L direction of rolling, hot rolling is performed so that the cross ratio (CRtotal ) of rolling, represented by equation CRtotal =(CR1 ) ×(CR2 ) ×(CR3 ) [where CRtotal is the cross ratio of rolling, CR1 is the cross ratio in the temp. range between

2. 发明专利

JPH09136102A MANUFACTURE OF (ALPHA+BETA) TYPE TITANIUM ALLOY SHEET 失效
公开(公告)号：JPH09136102A
公开(公告)日：1997-05-27
申请号：JP29554595
申请日：1995-11-14
申请人： NIPPON KOKAN KK
发明人： FUKAI HIDEAKI , IZAWA TORU , KOBAYASHI TAKAYUKI
IPC分类号： B21B3/00 , C22F1/00 , C22F1/18 , C23G1/10
摘要： PROBLEM TO BE SOLVED: To manufacture an (α+β) type titanium alloy sheet not only small in intra-plane anisotropy of strength but also excellent in surface property and appearance and small in distortion. SOLUTION: Hot cross rolling is applied to an ingot or a rough shape billet is packed under vacuum, the ingot is take from an envelope after cooling, a release agent is removed by executing pickling treatment and washing is executed within 5min after the completion of the pickling treatment. Before the pickling treatment, heat treatment is executed without taking out the sheet from the envelope. Also, before the pickling treatment, hot creep correcting treatment is executed without taking out the sheet from the envelope. In threeabove-mentioned methods, a mixed liquid of the hydrofluoric acid 1-10wt.% and the nitric acid of 1-20wt.% is used as a pickling liquid and the sheet is dipped for 0.5-20min. In this way, the (α+β) type titanium alloy sheet excellent in the surface property and surface appearance, small in the distortion is smaller, small in the intra-plane anisotropy of strength and excellent in isotropy is manufactured.

3. 发明专利

JPS6356370A MANUFACTURE OF TITANIUM CLAD STEEL SHEET 失效
公开(公告)号：JPS6356370A
公开(公告)日：1988-03-10
申请号：JP19820586
申请日：1986-08-26
申请人： NIPPON KOKAN KK
发明人： TAGANE AKIRA , TANAKA AKIHIRO , IZAWA TORU , TSUYAMA AOSHI , SEKI NOBUHIRO , MASUDA SADAKAZU
IPC分类号： B23K20/00 , B23K20/04
摘要： PURPOSE:To obtain the clad steel sheet having high joining strength and bendability by providing the prescribed gap between the base metal of a Fe base metal and Ti clad material and hot-rolling the assembly slab in which the joining intermediate material of a low carbon steel is inserted at the prescribed rolling temp. and under the clad index conditions. CONSTITUTION:An assembly slab is prepared by inserting the joining intermediate material in a thin thickness consisting of the low carbon steel of =8.0. However, K0 shows a plastic deformation resistance (kg/mm ), t0 plate thickness (mm) at the roll inlet side, t1 the plate thickness (mm) at the roll outlet side, tm the average plate thickness (mm) of the roll contact of plate stock, ld the roll contact length (mm) of a plate stock, R a roll radius (mm), (r) a rolling reduction rate (%), DELTAt a rolling reduction amount and alphathe plate thickness directional position.

4. 发明专利

JPH07241685A MANUFACTURE OF CLAD STEEL PLATE 失效
公开(公告)号：JPH07241685A
公开(公告)日：1995-09-19
申请号：JP6035494
申请日：1994-03-04
申请人： NIPPON KOKAN KK
发明人： TSURIZAKI KATSUYOSHI , IZAWA TORU , TAKESHITA SEIJI , ARIIZUMI TAKASHI
IPC分类号： B23K20/04 , B21B1/38
摘要： PURPOSE:To prevent the breakage during the rolling in manufacturing the clad steel plate where the sandwich type slab or sacrificial type slab is hot rolled. CONSTITUTION:Clad plates 2, 2 interposed with the peeling agent 5 inbetween are held by base materials 1, 1, frames 3 are arranged around the clad plates 2, 2, and a sandwich type assembled slab A is assembled by welding (at the welded part 6) the frames 3 with the base material 1. The taper 7 is provided at the four corners of the base materials 1, 1 which are to be the outer surface side of the slab A. When this type of slab A is hot rolled, the high draft rolling is executed in the initial rolling, i.e., before the draft reaches 25%.

5. 发明专利

JPH0523872A PRODUCTION OF ALUMINUM BRONZE CLAD STEEL PLATE HAVING EXCELLENT JOINT STRENGTH 失效
公开(公告)号：JPH0523872A
公开(公告)日：1993-02-02
申请号：JP20105391
申请日：1991-07-17
申请人： NIPPON KOKAN KK
发明人： KATAHIRA MASAHIRO , KOBAYASHI YASUO , SUWA MINORU , MATSUO TOSHINORI , IZAWA TORU
IPC分类号： B23K20/04 , B32B15/01
摘要： PURPOSE:To obtain the aluminum bronze clad steel plate having excellent joint strength even after high-strength hot working by using a specific cupronickel steel plate as a joining intermediate material and inserting Ni foil between a base metal and the joining intermediate material. CONSTITUTION:The strength of the intermediate material is increased and an intermetallic compd. is suppressed by using the cupronickel steel having a compsn. of 9 to 11% Ni-Cu between the Al bronze of a cladding metal and a base metal carbon steel. Further, a slab is assembled by inserting the Ni foil between the contact surfaces with the base metal carbon steel in addition to the cupronickel as the intermediate material. This slab is heated to >=900 deg.C and

6. 发明专利

JPH03174913A AL2O3 SYSTEM RELEASE AGENT AND ROLLING METHOD FOR CLAD STEEL SHEET & PACK TYPE STEEL SHEET 失效
公开(公告)号：JPH03174913A
公开(公告)日：1991-07-30
申请号：JP31351689
申请日：1989-12-04
申请人： NIPPON KOKAN KK , TAIHO IND CO
发明人： IZAWA TORU , KIYOKAWA HIROSHI , MATSUO TOSHINORI , TOMITA HIROSHI , SHIRAISHI HARUO , NAKAI SHIGERU
IPC分类号： B21B1/38 , B21B47/04 , B23K20/04 , C10M103/06
摘要： PURPOSE:To display the excellent peeling property by composing the release agent of the specific weight% of the specific granule of the Al2O3 powder, an organic adhesive agent, an organic dispersing agent and the balance of inevitable impurities. CONSTITUTION:The peeling agent is composed as follows. That is, the 99weight% of Al2O3 powder of granule expressed in terms of the surface area of the stock to be rolled after rolling, then the stock to be rolled is rolled. Therefore, the method is adequately applied to the manufacture of the park type rolling steel sheet.

7. 发明专利

JPS61272317A MANUFACTURE OF HIGH STRENGTH AUSTENITIC STAINLESS STEEL MATERIAL AT NORMAL AND HIGH TEMPERATURE RANGE SUPERIOR IN CORROSION RESISTANCE 失效
公开(公告)号：JPS61272317A
公开(公告)日：1986-12-02
申请号：JP11419485
申请日：1985-05-29
申请人： NIPPON KOKAN KK
发明人： MATSUMOTO KAZUAKI , TSUYAMA AOSHI , HONDA MASAHARU , MATSUMOTO SHIGEYASU , IZAWA TORU , TAKANE AKIRA
IPC分类号： C21D8/00 , C21D8/02
摘要： PURPOSE:To manufacture the titled steel material inexpensively by hot rolling austenitic stainless steel slab at recrystallization range of austenite, then cooling the plate acceleratedly under a suitable condition. CONSTITUTION:Austenitic stainless steel slab is heated to >=1,000 deg.C to allow Cr carbide thoroughly to be formed solid soln. in matrix. Next, the heated slab is hot rolled at recrystallization range of austenite to make uniform the structure. In the process described, above in case the strength is further improved, it is favorable to apply rolling down in recrystallization range of austenite, and also in unrecrystallized range of austenite to hot roll the slab at >=800 deg.C. Next, the obtd. hot rolled steel plate is cooled acceleratedly to at least 550 deg.C by >=2 deg.C/sec average rate, to prevent deterioration of corrosion resistance due to ppt. of Cr carbide, etc. in the midway of cooling. In this way, the titled steel having high yield strength in normal and high temp. ranges is obtd.

8. 发明专利

JPH058060A MANUFACTURE OF TITANIUM CLAD STEEL PLATE BY HOT ROLLING 失效
公开(公告)号：JPH058060A
公开(公告)日：1993-01-19
申请号：JP16060791
申请日：1991-07-01
申请人： NIPPON KOKAN KK
发明人： TAKANO TOSHIO , TSURISAKI KATSUYOSHI , IZAWA TORU
IPC分类号： B23K20/00 , B23K20/04 , B24B29/00 , B32B15/01
摘要： PURPOSE:To easily manufacture a titanium clad steel plate having stable joining strength and high in bending workability irrespective of the size of the clad steel plate concerning the hot rolled titanium clad steel plate. CONSTITUTION:A thin intermediate material 3 of a low carbon steel of the composition containing

9. 发明专利

JPS644426A HEAT TREATMENT OF TWO-LAYERED CLAD STEEL PLATE 失效
公开(公告)号：JPS644426A
公开(公告)日：1989-01-09
申请号：JP15753587
申请日：1987-06-26
申请人： NIPPON KOKAN KK
发明人： YOSHIHARA NAOTAKE , TAGASHIRA MOTOJI , TAGANE AKIRA , IZAWA TORU
IPC分类号： B23K20/00 , C21D1/18 , C21D9/00
摘要： PURPOSE:To prevent the generation of a warpage in a clad steel plate by joining single metallic plates which are the same in thickness and width and are specified in length to the front and rear ends of the clad steel plate and subjecting the clad steel plate to a heat treatment. CONSTITUTION:Such single metallic plates 2 which are approximately the same in the thickness and width as the clad steel plate 1 consisting of a base metal 11 and a cladding metal 12 and has the length l satisfying the equation are joined to the front and rear ends of the clad steel plate 1. In the equation, sigmar is the yield strength (kg/mm ) of the cladding metal; t1 is the thickness (mm) of the cladding metal; rho is the density (kg/mm ) of the metallic pieces for restraining. This clad steel plate with the wide having the large coefft. of linear expansion (for example, the cladding metal 12) faced downward is loaded into a heating furnace 3 and is thereby heated. The clad steel plate taken out of the furnace 3 is turned upside down and is cooled in a water cooler 4. The generation of the warpage in the clad steel plate 1 is thereby prevented. The clad steel plate does not warp even when worked with a roller leveling machine.

10. 发明专利

JPS62180013A MANUFACTURE OF NONTEMPER HIGH TENSION STEEL PLATE HAVING LOW WELDING CRACK SUSCEPTIBILITY 失效
公开(公告)号：JPS62180013A
公开(公告)日：1987-08-07
申请号：JP2120186
申请日：1986-02-04
申请人： NIPPON KOKAN KK
发明人： TSUKADA KOSHIRO , HIRABAYASHI KIYOTERU , YAMAZAKI YOSHITAKA , TANI SABURO , IZAWA TORU , ISHIKAWA MASARU
IPC分类号： C21D8/00 , C21D8/02 , C22C38/00 , C22C38/06 , C22C38/16
摘要： PURPOSE:To obtain the titled steel plate without deteriorating high toughness and weldability, by reducing P as impurity element in steel having a specified compsn. and carbon equivalent as hardenability and selecting the optimum combination relating slab heating temp. CONSTITUTION:Slab composed of =100 deg.C temp. width just after the rolling to 400 deg.C, thereafter, cooled at it is.

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