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21. 发明专利

JPH02290933A MANUFACTURE OF TITANIUM ALLOY HAVING HIGH FATIGUE RESISTANCE 失效
公开(公告)号：JPH02290933A
公开(公告)日：1990-11-30
申请号：JP20278289
申请日：1989-08-07
申请人： NIPPON STEEL CORP
发明人： SUZUKI HIROO , TAKEUCHI MAKOTO , TSUCHIYA KATSURA , TANAKA HIROSHI , FUJISAWA KAZUO
IPC分类号： C22F1/18 , C22C1/04 , C22C14/00 , C22F1/00
摘要： PURPOSE:To obtain the Ti alloy having high fatigue resistance without depending on a melting method by subjecting mixed powder contg. a master alloy constituted of Ti, Al and V and having reduced chlorine content with Fe in specified ratios to pressing and sintering under prescribed conditions. CONSTITUTION:Master alloy powder composed of Ti powder, Al and V and contg. =60% density. Next, the formed article is sintered at 1100 to 1500 deg.C for >=30min.

22. 发明专利

JPH02232303A MANUFACTURE OF TITANIUM ALLOY POWDER SINTERED PRODUCT 失效
公开(公告)号：JPH02232303A
公开(公告)日：1990-09-14
申请号：JP5144889
申请日：1989-03-03
申请人： NIPPON STEEL CORP
发明人： HAYAKAWA HIROSHI , SUZUKI HIROO , TSUCHIYA KATSURA
IPC分类号： C22F1/18 , B22F3/24 , C22F1/00
摘要： PURPOSE:To save machining and grinding stages and to obtain a sound product at high efficiency by pressurizing sintered Ti alloy in the specific temp. range and removing the residual voids on the surface layer with shot peening. CONSTITUTION:The Ti alloy constituting metal element powder is mixed, and compacting and vacuum-sintering are executed to executed HIP treatment. Then, the sintered Ti alloy is pressurized in the alpha+beta two phase range at temp. from 700 deg.C to beta transformation temp. to suppress the residual voids. The shot peening is executed to the surface of the HIP semiproduct to remove the residual voids on the surface layer. By this method, the Ti alloy sintered product having little residual voids can be manufactured at good yield and a low cost.

23. 发明专利

JPH0158248B2 失效
公开(公告)号：JPH0158248B2
公开(公告)日：1989-12-11
申请号：JP4056085
申请日：1985-03-01
申请人： NIPPON STEEL CORP
发明人： MURAKAMI MASAHITO , SUZUKI HIROO
IPC分类号： C22C38/00 , C21D6/00 , C21D8/00 , C21D8/02 , C22C38/04

24. 发明专利

JPH01152250A MANUFACTURE OF BETA-TITANIUM ALLOY HAVING HIGH HARDNESS VALUE 失效
公开(公告)号：JPH01152250A
公开(公告)日：1989-06-14
申请号：JP31103387
申请日：1987-12-10
申请人： NIPPON STEEL CORP
发明人： FUJII HIDEKI , SUZUKI HIROO
IPC分类号： C22F1/18 , C22F1/00
摘要： PURPOSE:To manufacture a beta-type titanium alloy having high hardness value by a simplified process in a short time by subjecting a beta-type titanium alloy to heating, solution heat treatment, rapid cooling, and ageing treatment in succession under respectively specified conditions. CONSTITUTION:A beta-type titanium alloy is heated at a temp. in the range between (beta-transus of this alloy)+300 deg.C and the melting temp. of this alloy to undergo solution heat treatment and cooled rapidly down to room temp. at >=10 deg.C/sec cooling rate. Subsequently, ageing treatment is applied to the above alloy at 100-550 deg.C for

25. 发明专利

JPS63270448A PRODUCTION OF ALPHA TYPE AND ALPHA TYPE TITANIUM ALLOY PLATE 失效
公开(公告)号：JPS63270448A
公开(公告)日：1988-11-08
申请号：JP10286087
申请日：1987-04-25
申请人： NIPPON STEEL CORP
发明人： HAYAKAWA HIROSHI , SUZUKI HIROO , KISHIDA KOJI
IPC分类号： C22F1/00 , B21B3/00 , C22F1/18
摘要： PURPOSE:To produce an alpha type titanium alloy hot rolled plate having less hot rolling cracks and having excellent quality by hot retaining the alpha type titanium alloy to a beta transus temp. or above, thereafter cooling the alloy, furthermore heat retaining it to the beta transus temp. or below and then hot rolling said alloy. CONSTITUTION:The alpha type titanium alloy or near alpha type titanium alloy is heated to the beta transus temp. of the alloy - beta transus temp. +150 deg.C, is subjected to a solution heat treatment and is furthermore heat retained at this temp. to uniformly convert the components into a solid solution. Said alloy is then cooled to =10 deg.C/sec cooling ratio to obtain an alpha phase which has less inclination of the components. Said alloy is thereafter heat retained between the beta trunsus temp. of the alloy -150 deg.C-beta transus temp. -150 deg.C, is successively hot rolled at >=30% total draft ratio, by which both of the hard a phase and soft beta phase are finely and closely distributed therebetween and the beta phase is transformed into the alpha phase. A hot rolled plate or a hot coil for cold rolling made of the alpha type and near a type titanium alloy having small material anisotropy, having good quality and having no cracks on the both end faces of the hot rolled plate is thereby obtd. in a high yield.

26. 发明专利

JPS62284060A MANUFACTURE OF HOT ROLLED TITANIUM ALLOY PLATE 失效
公开(公告)号：JPS62284060A
公开(公告)日：1987-12-09
申请号：JP12730086
申请日：1986-06-03
申请人： NIPPON STEEL CORP
发明人： HAYAKAWA HIROSHI , SUZUKI HIROO , KAKO KATSUO
IPC分类号： C22C14/00 , C22F1/00 , C22F1/18
摘要： PURPOSE:To inhibit the cracking of an alpha+beta type Ti alloy by forging and to manufacture a hot rolled Ti alloy plate having small anisotropy in quality by making the grains of the Ti alloy fine. CONSTITUTION:A Ti alloy ingot contg. 2.45-9wt% Al and 3-6wt% V in 0.8-1.7 weight ratio of Al/V is forged. The forged ingot is finish-rolled in the alpha+beta range and the resulting plate is rapidly heated to the beta-transformation point-(100-50 deg.C) in the alpha+beta range at >=1 deg.C/sec heating rate. It is held at the temp. for 1-5hr, cooled to 500 deg.C at

27. 发明专利

JPS62284048A PRODUCTION OF HOT ROLLED ALPHA+BETA TYPE TITANIUM ALLOY SHEET HAVING DECREASED ANISOTROPY 失效
公开(公告)号：JPS62284048A
公开(公告)日：1987-12-09
申请号：JP12570886
申请日：1986-06-02
申请人： NIPPON STEEL CORP
发明人： SHINDOU TAKATSUGU , HAYAKAWA HIROSHI , SUZUKI HIROO
IPC分类号： C22F1/18 , C22F1/00
摘要： PURPOSE:To produce a hot rolled alpha+beta type Ti alloy sheet having decreased anisotropy by subjecting an alpha+beta type Ti alloy slab to hot rolling under specific conditions, holding at a constant temp. and water cooling, and further subjecting the slab to hot rolling under specific conditions then to a post heat treatment. CONSTITUTION:The alpha+beta type Ti alloy slab is hot rolled in the longitudinal direction of the slab in the two-phase temp. region (about 950-800 deg.C) of alpha+beta, by which the fine structure is formed and the internal strain is increased to permit the easier isometric crystallization. The slab is then held for Si2hr in a 10-30 deg.C range below the beta transus to randomize the orientation of the structure, by which the structure is recrystallized and the formation of the coarse crystal grains is prevented. The slab is further cooled with water and is subjected to hot rolling in the longitudinal direction thereof at 20-50% total draft in a 600-700 deg.C range to form the hot coil having the structure of light Basal-texture. The rolled sheet is thereafter subjected to the post heat treatment to be ordinarily executed for the purpose of strain relieving and recrystallization, by which the hot rolled sheet having the decreased anisotropy in terms of mechanical properties is obtd.

28. 发明专利

JPS61201725A METHOD FOR WORKING FE-MN-SI SHAPE MEMORY ALLOY 失效
公开(公告)号：JPS61201725A
公开(公告)日：1986-09-06
申请号：JP4055985
申请日：1985-03-01
申请人： NIPPON STEEL CORP
发明人： MURAKAMI MASAHITO , SUZUKI HIROO
IPC分类号： C22C38/00 , C21D8/00 , C21D8/02 , C21D8/06 , C22C38/04
摘要： PURPOSE:To facilitate working of the titled alloy, by hot rolling shape memory ally composed of a specified compsn. of Mn, Si and Fe, then applying working at temp. of >=Md point, then annealing at temp. of >=Af point to said alloy. CONSTITUTION:The titled alloy composed of 20-40wt% Mn, 3.5-8% Si, if necessary further >=1 kind among =Md point to suppress formation of (epsilon) phase, next, annealed at temp. of >=Af point for a prescribed time to recover shape memory ability. In this way, the titled alloy is worked easily to sheet, wire, etc., without being influenced for bad in shape memory effect.

29. 发明专利

JPS612458B2 JPS612458B2 - 失效
公开(公告)号：JPS612458B2
公开(公告)日：1986-01-24
申请号：JP10713379
申请日：1979-08-24
申请人： Nippon Steel Corp
发明人： SUZUKI HIROO , NAKAMURA YASUSHI , SHIMA KOJI , YAMAMOTO TOSHIKI
IPC分类号： B22D11/124 , C21D1/84

30. 发明专利

JPS5821222B2 失效
公开(公告)号：JPS5821222B2
公开(公告)日：1983-04-27
申请号：JP1145274
申请日：1974-01-29
申请人： NIPPON STEEL CORP
发明人： INOE YASUSHI , SUZUKI HIROO , SATO KIMITAKA
IPC分类号： H01J37/20 , G01N1/28 , G01N23/225

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