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1. 发明专利

JPS643549A METHOD FOR NON-DESTRUCTIVE INSPECTION OF HYDROGEN EROSION OF EQUIPMENT MATERIAL 失效
公开(公告)号：JPS643549A
公开(公告)日：1989-01-09
申请号：JP15938087
申请日：1987-06-26
申请人： KAWASAKI STEEL CO , IDEMITSU ENG KK
发明人： SHIMOMURA JUNICHI , NAKANO YOSHIFUMI , UEDA SHUZO , KAWANO KOJI , ISHIKAWA TAKAICHI
IPC分类号： G01N25/14 , G01N7/16 , G01N25/00 , G01N25/72
摘要： PURPOSE:To enable the non-destructive inspection of hydrogen erosion by heating an equipment material or forcibly occluding hydrogen in the equipment material and measuring the amt. of the hydrogen released in a specific temp. range. CONSTITUTION:While the equipment material is kept heated, the amt. of the hydrogen released at each temp. is measured directly or after the hydrogen is forcibly occluded therein. The material subjected to the hydrogen erosion produces the peaks in the amt. of the hydrogen to be released according to the degree of the hydrogen erosion in a 300-600 deg.C range and, therefore, the degree of progression of the hydrogen erosion of the equipment material is known by measuring the amt. of the hydrogen released in this temp. range. The generation of the hydrogen erosion with the equipment material to be operated under high-temp. high-pressure hydrogen is, therefore detectable non- destructively in an early period of time.

2. 发明专利

DE69120266T2 未知
公开(公告)号：DE69120266T2
公开(公告)日：1996-10-10
申请号：DE69120266
申请日：1991-07-24
申请人： KAWASAKI STEEL CO
发明人： KUBO TAKAHIRO , NAKANO YOSHIFUMI , SHIGA CHIAKI , TANIGAWA OSAMU
IPC分类号： B23K35/30 , C22C38/08

3. 发明专利

DE69120266D1 未知
公开(公告)号：DE69120266D1
公开(公告)日：1996-07-18
申请号：DE69120266
申请日：1991-07-24
申请人： KAWASAKI STEEL CO
发明人： KUBO TAKAHIRO , NAKANO YOSHIFUMI , SHIGA CHIAKI , TANIGAWA OSAMU
IPC分类号： B23K35/30 , C22C38/08

4. 发明专利

JP2557993B2 失效
公开(公告)号：JP2557993B2
公开(公告)日：1996-11-27
申请号：JP1373890
申请日：1990-01-25
申请人： KAWASAKI STEEL CO
发明人： KUBO TAKAHIRO , NAKANO YOSHIFUMI , SHIGA CHIAKI , TANIGAWA OSAMU
IPC分类号： C22C38/00 , C21D6/00 , C22C38/08

5. 发明专利

JPH081369A LOW SPATTER WIRE FOR CO2 GAS SHIELDED ARC WELDING AND ITS MANUFACTURE 失效
公开(公告)号：JPH081369A
公开(公告)日：1996-01-09
申请号：JP13069394
申请日：1994-06-13
申请人： KAWASAKI STEEL CO
发明人： KATAOKA TOKIHIKO , YAMAURA AKIHISA , NAKANO YOSHIFUMI , TABATA NOBUHISA
IPC分类号： B23K35/02 , B23K35/36 , B23K35/40 , C21D1/26 , C23F17/00
摘要： PURPOSE:To provide a wire for the CO2 gas shielded arc welding where the Cu plating is not peeled, the plated surface is not rusted, or little spatter is generated. CONSTITUTION:The internal oxide is formed in the surface layer part of the steel wire, the alkaline metal is contained in the internal oxide, and the alkaline metal is >=1ppm to the whole wire. The citrate or the like consisting of the alkaline metal is coated on the surface of the steel wire, and then, annealed in the atmosphere of gaseous nitrogen.

6. 发明专利

JPH0747490A MANUFACTURING OF GAS SHIELDED WELDING SOLID WIRE BEING EXCELLENT IN WELDING WORKABILITY 失效
公开(公告)号：JPH0747490A
公开(公告)日：1995-02-21
申请号：JP19373493
申请日：1993-08-04
申请人： KAWASAKI STEEL CO
发明人： TABATA NOBUHISA , YAMAURA AKIHISA , KATAOKA TOKIHIKO , NAKANO YOSHIFUMI
IPC分类号： B21C1/00 , B21C9/00 , B23K35/40 , C23C8/22
摘要： PURPOSE:To provide a gas shielded arc welding wire being excellent in feedability and arc stability, and welding workability of low spattering, etc., and its manufacturing method. CONSTITUTION:A welding wire is guided to a carburizing atmosphere after intermediate drawing, a carburizing/hardening treatment is executed for 10 seconds - 10 minutes at 650-900 deg.C, thereafter, by using a drawing lubricating agent containing K, finish drawing of >30% is executed by a cross sectional area decrease rate, a crack is generated on the surface of the wire, and in this crack, K of 1-50ppm per weight of the wire is held.

7. 发明专利

JPH04235220A PRODUCTION OF AUSTENITIC STAINLESS STEEL EXCELLENT IN STRENGTH AT HIGH TEMPERATURE AND OXIDATION RESISTANCE 失效
公开(公告)号：JPH04235220A
公开(公告)日：1992-08-24
申请号：JP108891
申请日：1991-01-09
申请人： KAWASAKI STEEL CO
发明人： WATANABE OSAMU , NAKANO YOSHIFUMI
IPC分类号： C21D8/02 , C22C38/00 , C22C38/40
摘要： PURPOSE:To inexpensively produce an austenitic stainless steel having strength at high temp. and oxidation resistance at least equal to those obtained by the conventional technique. CONSTITUTION:At the time of applying hot working to an austenitic stainless steel having a composition which contains 16.0-20.0% Cr and 6.0-16.0% Ni and in which respective contents of Mn, Si, C, N, etc., are controlled, working is applied, in the final stage of hot working, by >=10 passes at =5 deg.C/sec cooling rate. By this method, the surface layer of the steel plate can be fine- grained and also the necessity of solid solution heat treatment after hot working can be obviated.

8. 发明专利

JPH04190139A CORROSION APPARATUS FOR FATIGUE TEST 失效
公开(公告)号：JPH04190139A
公开(公告)日：1992-07-08
申请号：JP31785490
申请日：1990-11-26
申请人： KAWASAKI STEEL CO
发明人： MATSUMOTO SHIGETO , SHIRATORI MITSUO , NAKANO YOSHIFUMI
IPC分类号： G01N17/00
摘要： PURPOSE:To accurately carry out the fatigue test of a test piece in corrosive environment by supplying the corrosive medium adjusted to predetermined temp. in a thermostatic tank to a corrosion tank. CONSTITUTION:The corrosive medium 12 adjusted to predetermined temp. within a thermostatic tank 1 naturally flows down from a supply port 6 to reach the water supply port 31 of a corrosion tank 3 to be guided to the corrosion tank 3. The medium 12 guided to the corrosion tank 3 is used in the corrosion of the test regions 4a of a test piece 4 and subsequently overflows from an overflow port 32 and naturally flows down to be quided into a storage tank 2 from the water supply port 9 of the storage tank 2. The corrosive medium 12 once stored in the storage tank 2 is taken out of a drain port 10 to be circulated to the thermostatic tank 1 from the water supply port 8 thereof by a circulating pump 5 to be adjusted to predetermined temp. The medium 12 flowing out of the overflow port 7 of the thermostatic tank 1 is also stored in the storage tank 2 and recirculated to the thermostatic tank 1 by the pump 5 and, therefore, the medium 12 does not flow out of the tank during the test.

9. 发明专利

JPH04107219A PRODUCTION OF STEEL PLATE FOR LOW TEMPERATURE USE HAVING LOW YIELD RATIO 失效
公开(公告)号：JPH04107219A
公开(公告)日：1992-04-08
申请号：JP22448890
申请日：1990-08-28
申请人： KAWASAKI STEEL CO
发明人： KUBO TAKAHIRO , NAKANO YOSHIFUMI
IPC分类号： C21D6/00 , C21D9/46 , C21D9/52
摘要： PURPOSE:To produce a steel plate for low temp. use having low yield ratio by preparing a steel plate for low temp. use containing specific amounts of Ni by means of hot rolling and successively subjecting this steel plate to primary hardening and secondary hardening under respectively specified conditions. CONSTITUTION:A steel plate for low temp. use prepared by means of hot rolling and containing 7.5-12.0wt.% Ni as a principal component is heated up to a temp. region not lower than the Ac3 transformation point and subjected to primary hardening at >=15 deg.C/s cooling rate. Subsequently, the above steel plate is heated up to a temp. region between the Ac3 transformation point and the Ac1 transformation point, subjected to secondary hardening at 1 deg.C/min-14 deg.C/s cooling rate, and then tempered in a temp. region not higher than the Ac1 transformation point. By this method, the steel plate for low temp. use where low yield ratio is attained while securing a high Charpy absorbed energy value in the upper plateau and also the desired yield ratio is freely obtained can be produced.

10. 发明专利

JPH03207813A MANUFACTURE OF AUSTENITIC STAINLESS STEEL HAVING GOOD HIGH TEMPERATURE CHARACTERISTICS AND STRUCTURAL STABILITY 失效
公开(公告)号：JPH03207813A
公开(公告)日：1991-09-11
申请号：JP159690
申请日：1990-01-10
申请人： KAWASAKI STEEL CO
发明人： WATANABE OSAMU , NAKANO YOSHIFUMI
IPC分类号： C21D8/00 , C22C38/00 , C22C38/54
摘要： PURPOSE:To manufacture the austenitic stainless steel having good high temp. characteristics and structural stability at low cost by subjecting a steel having a specified compsn. constituted of C, Si, Mn, Cr, Ni, N, B and Fe to specified hot rolling and cooling. CONSTITUTION:An austenitic stainless steel contg., by weight, =10% draft is executed. Furthermore, final finish rolling is executed in the temp. range of >1000 deg.C. After that, the hot rolled sheet is cooled in the temp. range of 900 to 500 deg.C at >=5 deg.C/sec cooling rate. In this way, the austenitic stainless steel having good strength and ductility at high temps. as well as having good structural stability at high temps. while solid soln. heat treatment is obviated can be obtd.

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