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51. 发明专利

JPS6043887B2 JPS6043887B2 - 失效
公开(公告)号：JPS6043887B2
公开(公告)日：1985-10-01
申请号：JP16074080
申请日：1980-11-17
申请人： Hitachi Ltd
发明人： UCHIDA TETSUO , AKAHORI KIMIHIKO , NIIYAMA EISUKE
IPC分类号： C21C7/00 , F27D11/08
CPC分类号： C21C7/0075

52. 发明专利

JPS60177123A METHOD FOR REFINING MOLTEN STEEL IN LADLE 失效
公开(公告)号：JPS60177123A
公开(公告)日：1985-09-11
申请号：JP3239184
申请日：1984-02-24
申请人： HITACHI LTD
发明人： UCHIDA TETSUO , UCHIDA TOSHIO , ARATO TOSHIAKI , SASAKI TOSHIMI
IPC分类号： C21C7/00
摘要： PURPOSE:To improve the refining efficiency by piercing holes for spouting an inert gas and a flux in the tip of an immersion pipe when an electrode enclosed with the pipe is immersed in molten steel and by heating the molten steel with arc through a flux. CONSTITUTION:An electrode 3 is immersed in molten steel 2 in a ladle 1 and enclosed with an immersion pipe 8 having holes 15 for spouting an inert gas and a flux at the tip. The molten steel 2 is heated with arc through a flux 11 having refining power. By this method the refining efficiency is improved in spite of short-time refining with a small amount of the flux 11.

53. 发明专利

JPS6083764A PRODUCTION OF HIGH-CHROMIUM CAST IRON BLANK MATERIAL FOR ROLLING ROLL 失效
公开(公告)号：JPS6083764A
公开(公告)日：1985-05-13
申请号：JP19180883
申请日：1983-10-14
申请人： HITACHI LTD
发明人： ARATO TOSHIAKI , KONDOU YASUO , UCHIDA TETSUO , KODAMA HIDEYO
IPC分类号： B22D23/10 , B22D23/06 , B22D27/02
摘要： PURPOSE:To form fine grains of a crystal and to obtain a high-Cr cast iron blank material for a rolling roll having high toughness by using a CaF2-Al2Cl3 flux added with halogen or alkaline earth metal to melt, dephosphorize and desulfurize said material and cooling quickly the material. CONSTITUTION:>=1 Kind of halide such as CaCl2 and a chloride of alkaline earth metal such as Na2CO3 or the like and further an alkaline earth metal such as Ca is added to a system consisting essentially of CaF2-Al2Cl3. A high-Cr steel as a base metal for an electrode is melted in an inert atmosphere in an electroslag refining furnace by using such refining flux. The steel is subjected simultaneously to dephosphorization and desulfurization reaction in the molten flux and is then continuously and quickly cooled. The dephosphorization and desulfurization are effectively accomplished by the above-mentioned method, by which the tensile strength and deflective strength are improved by the above- mentioned method and at the same time the fine crystal grains are formed. The high-Cr cast iron blank material for the rolling roll having intended hardness is obtd.

54. 发明专利

JPS5732848A Method for bottom charge casting 失效
标题翻译：用于底部充电铸造的方法
公开(公告)号：JPS5732848A
公开(公告)日：1982-02-22
申请号：JP10829980
申请日：1980-08-08
申请人： Hitachi Ltd
发明人： UCHIDA TETSUO , AKAHORI KIMIHIKO , SEKIJIMA TOKUO
IPC分类号： B22D7/00 , B22D23/00 , B22D27/18
摘要： PURPOSE: To prevent oxidation of charged molten steel through isolating it from the atmosphere so as to obtain sound steel ingot by supplying a molten metal surface coating agent into the mold in the process of bottom charge casting and at the same time by providing a cover between the charge port of a ladle and the charge pipe.
CONSTITUTION: The molten metal in a ladle 1 is charged into a mold 8 from the bottom through a charge pipe 6 set on a molding board 10 and a runner 7. In this case, a molten metal surface coating agent 9 is supplied in advance in the mold 8. Moreover, an air interrupting cover 5 is installed between a charge port 3 and the charge pipe 6 and an inert gas is introduced within the cover. Therefore, castings are performed in the state that the bottom of the ladle, the charge pipe 6, and the runner 7 are isolated from the atmosphere by the molten metal surface coating agent, and the oxidation preventing effect is considerably enhanced with less using of the inert gas. Thus steel ingots having less nonmetallic inclusions are casted.
COPYRIGHT: (C)1982,JPO&Japio
摘要翻译：目的：为了防止带电的钢水通过将其与大气隔离来氧化，以便通过在底部电荷铸造过程中将熔融金属表面涂层剂提供到模具中而获得声钢锭，并且同时通过在钢包的充电口和充电管。构成：将钢水包1中的熔融金属从底部通过设置在成型板10和流道7上的加料管6装入模具8.在这种情况下，预先供给熔融金属表面涂层剂9 模具8.此外，在充电口3和充电管6之间安装有空气中断盖5，并且在盖内引入惰性气体。因此，在钢包的底部，充电管6和流道7通过熔融金属表面涂层剂与大气隔离的状态下进行铸造，并且通过较少使用惰性气体。因此铸造具有较少非金属夹杂物的钢锭。

55. 发明专利

JPS5639163A PRODUCTION OF STEEL INGOT 失效
公开(公告)号：JPS5639163A
公开(公告)日：1981-04-14
申请号：JP11525879
申请日：1979-09-10
申请人： HITACHI LTD
发明人： UCHIDA TETSUO , AKAHORI KIMIHIKO , KUMASAKA HIROSHI , YOSHIOKA ICHIROU
IPC分类号： B22D7/00 , B22D27/20
摘要： PURPOSE:To prevent the occurrence of segregation and internal defects effectively by blowing an inert gas into a mold from its bottom part at a predetermined flow rate during pouring or after ending of pouring in the case of performing bottom charge ingot making. CONSTITUTION:Molten metal passes through the sprue consisting of lining bricks 10 and a metal frame 11 and the cross gate in cross gate bricks 1 and is poured into the mold through the pouring port formed by the casting port bricks 6 and rising board 15 in the lower part of the casting of the lower part of the mold. An inert gas feed pipe 9 is provided within the molding board 2 of this mold and an inert gas is blown through said pipe 9 into the cross gate from the porous bricks 3 provided right under the rising part of the pouring port bricks 6 at a flow rate within a 5-100l/min range during pouring and after ending of the pouring. Thence, at the time of stopping blowing the inert gas, the rate of blowing is successively lowered and the blowing is stopped when the rate of blowing becomes 1/2 of the maximum rate of blowing. Here, it is also possible to blow the inert gas from the circumference of the rising port.

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