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11. 发明专利

GB1342991A CARBOTHERMIC METHOD FOR CONVERTING A REACTIVE METAL OXIDE TO METAL OR NITRIDE FORM IN A SPECIFIC MOLTEN METAL SOLVENT 未知
公开(公告)号：GB1342991A
公开(公告)日：1974-01-10
申请号：GB1342991D
申请日：1971-01-18
申请人： PARLEE ANDERSON CORP
IPC分类号： C01B6/00 , C01B21/06 , C01B21/076 , C22B5/00 , C22B5/10 , C22B39/00 , C22B45/00 , C22B47/00 , C22B51/00 , C22B53/00 , C22B55/00 , C22B61/02 , C22B61/04
摘要： 1342991 Boron; silicon; metal nitrides; titanium hydride PARLEE ANDERSON CORP 18 Jan 1971 2258/71 Heading C1A [Also in Division C7] Metals, or non-metals such as boron and silicon, which are readily capable of reacting with nitrogen or carbon to form nitride or carbide are reduced from their oxides by a carbothermic method using carbon or carbon source material in excess of stoichiometric requirements, in a molten solvent at temperatures above 600‹ K., the carbon monoxide partial pressure over the reaction mixture being maintained below the equilibrium value for the reaction. The metal solvent is one which lowers the reactivity of the reduced product below that required for the formation of carbide and is capable of forming stable compounds with the reduced product. Tin may be used as solvent metal in the production of boron or silicon or copper in the production of boron. By maintaining a partial pressure of nitrogen over the reaction mixture the reduced metal or non- metal may be obtained as a pure nitride product which can be separated from the solvent metal. In this way nitrides of such metals as niobium, tantalum, plutonium, uranium, zirconium and hafnium. When the reaction mixture contains a mixture of metals, specific gravity differences between the nitrides formed may allow a separation to be effected, lighter nitrides floating on the solvent metal while heavier nitrides sink. Alternatively, where titanium is the reactive metal a hydrogen atmosphere may be used to form titanium hydride which floats on the solvent and may be skimmed off.

12. 发明专利

CS150507B2 未知
公开(公告)号：CS150507B2
公开(公告)日：1973-09-04
申请号：CS345570
申请日：1970-05-19
IPC分类号： C22B34/20 , B22F9/28 , C22B5/02 , C22B5/16 , C22B34/36 , C22B61/00 , C22C1/02 , C22B57/00 , C22B49/00 , C22B51/00 , C22B39/00
摘要： 1284178 Producing refractory metal or alloy powder by reduction REDERIAKTIEBOLAGET NORDSTJERNAN 18 May 1970 [19 May 1969 2 April 1970] 23977/70 Heading C7D Powdered W, Mo, Ta, Nb, Re, Cr or alloy thereof e.g. W-Re is produced by reduction of the gaseous halide e.g. WCl 6 with a reducing gas comprising mainly H 2 , the halide and reducing gases e.g. from supply pipes 4, 5 with or without other gases e.g. Cl 2 , HCl or N 2 from pipe 6 being mixed in at least one duct 3 and pre-heated to, e.g. 20-150‹ C. above the minimum reaction temperature (300-330‹C. for WCl 6 ) using heating elements 7, before entering the reaction chamber 1. The particle size of the powder formed is adjusted by controlling one or more of the ratio of the reactants in the gases, its velocity or temperature; and preferably also the temperature of the reaction chamber, e.g. in zones by groups of heating elements 2, the temperature increasing in the direction of gas flow. A vibrator 10 and heat exchanger 8 (for cooling) may be mounted adjacent the mixing duct 3.

13. 发明专利

FR2152738A1 未知
公开(公告)号：FR2152738A1
公开(公告)日：1973-04-27
申请号：FR7231776
申请日：1972-09-07
申请人： TAYLOR MELVIN
IPC分类号： C01G37/02 , C22B34/32 , C22B7/00 , C01G37/00 , C22B39/00

14. 发明专利

FI43646B 未知
公开(公告)号：FI43646B
公开(公告)日：1971-02-01
申请号：FI93066
申请日：1966-04-12
申请人： OUTOKUMPU OY
发明人： BRYK P , HONKASALO J , MALMSTROEM R , TUOVINEN F , MAEKIPIRTTI S
IPC分类号： C21C7/00 , C22B39/00

15. 发明专利

SE27696C1 未知
公开(公告)号：SE27696C1
公开(公告)日：1909-11-13
申请号：SE27696D
IPC分类号： C22B39/00

16. 发明专利

OA4159A 未知
公开(公告)号：OA4159A
公开(公告)日：1979-12-15
申请号：OA54672
申请日：1972-08-23
申请人： JOHANNESBURG CONS INVEST
IPC分类号： C22B1/00 , C22B1/02 , C22B1/14 , C22C33/04 , C22B39/00
CPC分类号： C22B1/14 , C22B1/00 , C22B1/02

17. 发明专利

FR2134519B1 未知
公开(公告)号：FR2134519B1
公开(公告)日：1977-01-14
申请号：FR7214723
申请日：1972-04-25
申请人： ALLEGHENY LUDLUM IND INC
IPC分类号： B23K35/30 , C22C38/58 , B23K35/00 , B23K9/00 , C22B39/00
摘要： 1355763 Welding by fusion ALLEGHENY LUDLUM INDUSTRIES Inc 26 April 1972 [27 April 1971] 19333/72 Heading B3R [Also in Division C7] A method of producing a weld between two metallic members, especially stainless steels, involves gas-shielded arc welding using, as the weld metal, an austenitic steel having the composition 7À5 to 16% manganese 17À5 to 26% chromium 5 to 7% nickel 0À75 to 4% molybdenum 0À18 to 0À38% nitrogen up to 0À1% carbon up to 1À0% silicon the balance being iron. The shielding atmosphere may be argon, helium, nitrogen or a mixture thereof. The weld metal may serve as an electrode; alternatively, a non-consumable electrode may be used, e.g. of tungsten.

18. 发明专利

SE7312820L 未知
公开(公告)号：SE7312820L
公开(公告)日：1975-03-21
申请号：SE7312820
申请日：1973-09-20
申请人： SHOWA DENKO KK
发明人： YOSHIDA T , USIYAMA K , YAMANAKA M
IPC分类号： C22B34/32 , C22B39/00

19. 发明专利

SU425955A1 未知
公开(公告)号：SU425955A1
公开(公告)日：1974-04-30
申请号：SU1843978
申请日：1972-11-09
IPC分类号： C22C33/04 , C22C33/00 , C22B39/00 , C22D7/06

20. 发明专利

FR2133828A1 Manufacture of nickel-chromium-iron alloy objects - which are resistant to intercrystalline corrosion 未知
公开(公告)号：FR2133828A1
公开(公告)日：1972-12-01
申请号：FR7213477
申请日：1972-04-17
申请人： MANNESMANN AG
IPC分类号： C21D8/00 , C22B39/00 , C21D7/00 , F28F21/00
摘要： The alloys contain >=20% Ni. The objects are cold formed and are briefly annealed after each forming operation to obtain a fine distribution of carbides. The annealing is carried out at a temp. between the recrystallisation temp. and the dissolution temp., pref. 900 degrees C.

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