专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

51. 发明专利

JPH0672758A CARBON-CONTAINING BASIC REFRACTORY 失效
公开(公告)号：JPH0672758A
公开(公告)日：1994-03-15
申请号：JP24888292
申请日：1992-08-26
申请人： NIPPON STEEL CORP , KUROSAKI REFRACTORIES CO
发明人： NAKAO ATSUSHI , GOTO KIYOSHI , TAIRA HATSUO , SURUGA TOSHIHIRO , KAWASAKI KAZUHIKO
IPC分类号： C04B35/00 , C04B35/04 , C04B35/043
摘要： PURPOSE:To improve oxidation resistance and spalling resistance by blending respectively a specific quantity of graphite, a basic refractory raw material, metal Al and metal Ti. CONSTITUTION:A raw material blended material is obtained by blending 3-30wt.% graphite such as an artificial graphite, 60-94wt.% basic refractory such as an electromelting magnesia having high purity, large bulk density and crystal size, 3-10wt.% sum of metal Al and metal Ti having high purity and

52. 发明专利

JPH0611665B2 失效
公开(公告)号：JPH0611665B2
公开(公告)日：1994-02-16
申请号：JP338790
申请日：1990-01-12
申请人： NIPPON STEEL CORP
发明人： TAIRA HATSUO , NAKAMURA YUKIHIRO , HASEGAWA JUNZO , OOCHI TATSUYA
IPC分类号： C04B35/101 , C04B35/10

53. 发明专利

JPH05294762A 失效
公开(公告)号：JPH05294762A
公开(公告)日：1993-11-09
申请号：JP12538992
申请日：1992-04-20
申请人： NIPPON STEEL CORP
发明人： MATSUI TAKESHI , TAIRA HATSUO , TAKEUCHI KAZUHIKO , NAKAO ATSUSHI
IPC分类号： C04B35/103 , C04B35/71 , C04B41/49 , C04B41/85
摘要： PURPOSE:To improve oxidation resistance by impregnation treating a refractory, obtained by kneading each of a specific quantity of an Al2O3 fire-proofing raw material, a SiC fire-proofing raw material and graphite, molding and firing in a non-oxidizing atmosphere at a prescribed temp., with Mg alkoxide. CONSTITUTION:The Al2O3 fire-proofing raw material of 60-90 pts.wt. (hereafter pts.) having >=95% purity, the SiC fire-proofing raw material of 5-20 pts. having >=90% purity and graphite of 5-20 pts. having >=90% purity where particle diameter of these raw materials is =600 deg.C. After that, Mg-alkoxide is impregnated into the fired material, uniformly dispersed inside of the fired material and heat treated to form MgO which forms a magnesium-aluminum spinel by allowing to react with Al2O3 in the fired material and the carbon-containing refractory excellent in corrosion resistance and oxidation resistance is obtained.

54. 发明专利

JPH05286755A 失效
公开(公告)号：JPH05286755A
公开(公告)日：1993-11-02
申请号：JP11244892
申请日：1992-04-06
申请人： NIPPON STEEL CORP
发明人： TAKEUCHI KAZUHIKO , TAIRA HATSUO , NAKAO ATSUSHI , MATSUI TAKESHI
IPC分类号： C04B35/101 , C04B35/84 , C04B41/50 , C04B41/82 , C04B41/85 , C04B35/10
摘要： PURPOSE:To provide a high alumina brick being uniform and having a stronger binding comparing with a conventional one, in a high alumina brick used for a wall lining inside an atmospheric furnace not in contact with a molten material. CONSTITUTION:A brick compsn. having a chemical composition consisting of 50.0-99.8wt.% Al2O3 and the balance of at least a kind of oxide, such as SiO2, Fe2O3, etc., is impregnated with a metallic magnesium alkoxide and is fired at 1400 deg.C. In this way, as a binding at particle boundary is strengthened, a high temperature strength or a thermal impact resistance is remarkably improved.

55. 发明专利

JPH05286752A 失效
公开(公告)号：JPH05286752A
公开(公告)日：1993-11-02
申请号：JP11318292
申请日：1992-04-07
申请人： NIPPON STEEL CORP
发明人： NAKAO ATSUSHI , TAIRA HATSUO , TAKEUCHI KAZUHIKO , MATSUI TAKESHI
IPC分类号： C04B35/047 , C04B35/04 , C04B41/82 , C04B41/85
摘要： PURPOSE:To obtain basic refractories having a uniform and dense structure and high corrosion resistance by impregnating a magnesia-chrome refractory molded form with titanium alkoxide and burning the same. CONSTITUTION:Basic refractories are obtained by impregnating a magnesiachrome refractory molded form with titanium alkoxide and burning the same. Gaseous hydrocarbon and steam are volatilized during burning. Titanium alkoxide impregnated into the inside of the magnesia-chrome refractory molded form produces very fine titania crystal. The titania crystal is uniformly dispersed in the insides of pores infiltrated with titanium alkoxide. The produced fine titania particles react with the constitutional components of the refractories during burning of the refractories and thereby 2MgO.TiO2, MgO.TiO2 and MgO.2TiO2 are produced. The structure of magnesia-chrome refractories is made dense by performing liquid phase sintering reaction at >=1600 deg.C.

56. 发明专利

JPH05286751A 失效
公开(公告)号：JPH05286751A
公开(公告)日：1993-11-02
申请号：JP11318192
申请日：1992-04-07
申请人： NIPPON STEEL CORP
发明人： NAKAO ATSUSHI , TAIRA HATSUO , TAKEUCHI KAZUHIKO , MATSUI TAKESHI
IPC分类号： C04B35/047 , C04B35/04 , C04B41/82 , C04B41/85
摘要： PURPOSE:To obtain basic refractories having a uniform and dense structure and high corrosion resistance by impregnating magnesia-chrome refractories with zirconium alkoxide. CONSTITUTION:Basic refractories are obtained by impregnating magnesiachrome refractories with zirconium alkoxide. Gaseous hydrocarbon and steam are volatilized by performing heat treatment. Zirconium alkoxide impregnated into the inside of the magnesia-chrome refractories produces very fine zirconia crystal. The zirconia crystal is uniformly dispersed in the insides of pores infiltrated with zirconium alkoxide and fills the pores to make the structure dense. Furthermore, fine zirconia particles present in the insides of the pores react with slag infiltrated during the use of refractories and viscosity of slag is raised. Infiltration of slag is inhibited. In such a way, the service life of magnesia-chrome refractories is prolonged by inhibiting infiltration of slag which is accompanied by making the structure dense and raising the viscosity of slag.

57. 发明专利

JPH0436454A THERMAL SPRAYING MATERIAL AND THERMALLY SPRAYED HEAT RESISTING MEMBER 失效
公开(公告)号：JPH0436454A
公开(公告)日：1992-02-06
申请号：JP13960590
申请日：1990-05-31
申请人： NIPPON STEEL CORP , TOCALO CO LTD , ONODA CEMENT CO LTD
发明人： TAIRA HATSUO , IMAWAKA HIROSHI , HARADA YOSHIO , MIFUNE NORIYUKI , HAGIWARA HIROSHI , YOGORO TAKAYUKI
IPC分类号： C23C4/10
摘要： PURPOSE:To improve product yield and to provide prolonged heat resistance and thermal shock resistance by blending 2MgO.SiO2 and MgO.4ZrO2 in a specific ratio. CONSTITUTION:A thermal spraying material is composed of a 2MgO.SiO2- MgO.4ZrO2 oxide and has a composition which consists of, by weight, 20-50% 2MgO.SiO2 and 50-80% MgO.4ZrO2 and in which 2MgO.SiO2+MgO.4ZrO2=100 is satisfied. A heat resisting member is formed by thermally spraying the above coating material on a heat resisting metallic material or parts having metallic coating layer excellent in high temp. corrosion resistance. The grain size of the oxide as coating material is regulated to 5-500mum, and particularly, it is preferable to regulate average grain size to 10-100mum. This thermal spraying material has superior mechanical strength. By using this thermally sprayed layer, a turbine blade, etc., having excellent thermal shield effect and heat resistance can be obtained.

58. 发明专利

JPH02156037A HEAT-RESISTANT PIERCING PLUG 失效
公开(公告)号：JPH02156037A
公开(公告)日：1990-06-15
申请号：JP31131688
申请日：1988-12-09
申请人： NIPPON STEEL CORP , ASAHI GLASS CO LTD
发明人： HAMASHIMA KAZUO , TAIRA HATSUO , NAKAMURA MASANORI
IPC分类号： B21B25/00 , C22C29/14
摘要： PURPOSE:To manufacture the plug having improved wear resistance and strength by using a sintered body of a hard phase essentially consisting of Ni-Mo complex fluoride or the like and a bonding phase essentially consisting of Ni and Mo. CONSTITUTION:The piercing plug is formed by a sintered body constituted of a hard phase essentially consisting of one or more kinds among Ni-Mo complex fluoride (Mo2NiB2), Ni-W complex fluoride (W2NiB2) and Ni-Mo-W complex floride [(Mo-W)2NiB2] and a bonding phase of an Ni-Mo alloy essentially consisting of Ni and Mo. At this time, the quantity of the hard phase in the sintered body is preferably regulated to 40 to 80wt.%. In this way, the piercing plug having prolonged service life in which seizure resistance with the material to be worked is improved can be obtd.

59. 发明专利

JPS63250449A ROLL FOR HEAT TREATMENT FURNACE 失效
公开(公告)号：JPS63250449A
公开(公告)日：1988-10-18
申请号：JP8668087
申请日：1987-04-08
申请人： NIPPON STEEL CORP
发明人： HANAGIRI SEIJI , TAMURA SHINICHI , TAIRA HATSUO
IPC分类号： C21D1/00 , C23C4/10
摘要： PURPOSE:To improve wear resistance at high temp. and build-up resistance, by coating the surface of a hearth roll used in a heat treatment furnace with a layer of cermet containing titanium nitride or titanium carbide. CONSTITUTION:The grains of TiN and TiC having extremely high melting points among ceramics and excellent in heat resistance, thermal conductivity, corrosion resistance, and wear resistance, and the powder of alloys of CoCrAlY, NiCrAlY, etc., as binders are mixed, and the resulting powder mixture is subjected to plasma thermal spraying, etc, so as to form a cermet layer on the surface of a hearth roll used for conveying billets in a heat treatment furnace such as continuous annealing furnace. By this method, the hearth roll extremely excellent in wear resistance at high temp. and build-up resistance and having long service life can be obtained.

60. 发明专利

JPS63223111A METHOD FOR BLOWING FINE POWDERED COAL INTO BLAST FURNACE 失效
公开(公告)号：JPS63223111A
公开(公告)日：1988-09-16
申请号：JP5666987
申请日：1987-03-13
申请人： NIPPON STEEL CORP
发明人： TAIRA HATSUO , TAMURA SHINICHI , SATO YUJI , MAEKAWA NORIYUKI
IPC分类号： C21B5/00
摘要： PURPOSE:To eliminate clogging in a tuyere caused by sticking ash of fine powdered coal to the inner face of the tuyere and to reduce thermal loss of the tuyere, by using the fine powdered coal having the specific composition of ash at the time of blowing the fine powdered coal from the tuyere o f the blast furnace. CONSTITUTION:Tip of the pipe 1 for blowing the fine powdered coal is inserted in the tuyere 2 of the blast furnace and by blowing the fine powdered coal in the furnace, efficiency of reduction in the furnace is improved. In this case, the tuyere 2 is prevented from erosion as was cooling structure and also by fitting heat insulating sleeve 3 composing of ceramic material in the inner face, large quantity of thermal loss caused by water cooling of the tuyere is prevented. On the surface of this sleeve 3, the ash 4 generating by combustion of the fine powdered coal is stuck, as a result, the tuyere 2 becomes clogging and some trouble in the blast furnace operation occurs. In order to prevent this, by using the fine powdered coal containing 1.8wt.% of network-modifier oxide of CaO, Na2O, K2O, etc., in the ash at the time of burning at 1,200 deg.C to the total ash, the blast furnace operation, which the trouble of clogging caused by the ash 4 does not occur and thermal loss of the tuyere is little by the heat insulating ceramic sleeve 3, can be executed.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式