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1. 发明专利

JPH09239519A MANUFACTURE OF ELECTROSLAG RE-MELTED CAST BILLET, AND MANUFACTURE OF TURBINE ROTOR SHAFT BY ELECTROSLAG RE-MELTING 失效
公开(公告)号：JPH09239519A
公开(公告)日：1997-09-16
申请号：JP7928596
申请日：1996-03-08
申请人： JAPAN STEEL WORKS LTD
发明人： ITO TERUHIRO , TAKENOUCHI TOMOO , FUNAZAKI MITSUNORI , YAMADA HITOHISA , ASANO IWAO
IPC分类号： F01D5/02 , B22D23/10 , C22B9/18 , C22B9/187
摘要： PROBLEM TO BE SOLVED: To manufacture a steel ingot preferably for manufacturing a turbine shaft by providing an inclination in the content distribution of the specified composition making use of the content movement between the molten metal and the molten slag during ESR. SOLUTION: The additional slag whose content of the compound of the specified composition is different from that of the molten slag is charged in the molten slag during ESR to change the movement of the specified composition between the molten metal and the molten slag. In particular, when a steel ingot for a turbine rotor shaft in which the boron content of a shaft part is lower than that of a barrel part is manufactured through ESR, an electrode for re-melting which contains boron of the quantity corresponding to the quantity of boron for the rotor body part is used, and the molten slag in which the quantity of the boron oxide is smaller than the quantity to be balanced with the boron quantity to be reacted in re-melting the electrode corresponding to the turbine shaft part is used. At the same time, the molten slag containing the boron oxide of the quantity approximately not less than the quantity to be balanced with boron to be reacted in re-melting the electrode corresponding to the rotor body part is used.

2. 发明专利

JPH03138323A MANUFACTURE OF MG-CONTAINING NI-CU BASE ALLOY INGOT 失效
公开(公告)号：JPH03138323A
公开(公告)日：1991-06-12
申请号：JP27491289
申请日：1989-10-24
申请人： JAPAN STEEL WORKS LTD
发明人： TAKENOUCHI TOMOO , ICHINOMIYA YOSHIAKI
IPC分类号： C22B9/18
摘要： PURPOSE:To transfer and incorporate Mg into the ingot at high yield by adding MgO to slag constituted of CaF2, CaO and Al2O3 as a fundamental compsn. and subjecting it to electroslag remelting. CONSTITUTION:By weight, 0.5 to 1.5% MgO is added to slag constituted of 40 to 65% CaF2, 20 to 35% CaO and 15 to 25% Al2O3 as a fundamental compsn., which is subjected to electroslag remelting and is refined into an ingot. In this way, the yield of Mg transferred and incorporated into the ingot comes to nearly 100%, and the surface of the obtd. ingot is made excellent as well. Furthermore, the forgeability of the ingot is made satisfactory.

3. 发明专利

JPS57137414A METHOD FOR REMOVAL OF IMPURITY ELEMENT OF MOLTEN STEEL 失效
公开(公告)号：JPS57137414A
公开(公告)日：1982-08-25
申请号：JP2299081
申请日：1981-02-20
申请人： JAPAN STEEL WORKS LTD
发明人： KITAMURA KAZUO , TAKENOUCHI TOMOO
IPC分类号： C21C7/04
摘要： PURPOSE:To remove impurity elements such as P, Sn, Sb, As, Pb, Bi, by treating molten steel contg. a specific amt. or below of C by means of metallic Ca, Ca alloys and Ca compounds in a nonoxidative atmosphere or in the presence of strong reducing slag. CONSTITUTION:Molten steel 2 contg. >=1 kind of P, Sn, Sb, As, Pb, Bi as impurity elements and =200ppm in terms of Ca. Immediately after the reaction the steel 2 is flowed into the 2nd ladle 7 through a rotary nozzle 6. Since the impurity metals have high affinity to the Ca, they react to form solids, which are left in the ladle 1.

4. 发明专利

JPH06136469A PRODUCTION OF NI-FE BASE SUPERALLOY INGOT 失效
公开(公告)号：JPH06136469A
公开(公告)日：1994-05-17
申请号：JP30805492
申请日：1992-10-22
申请人： JAPAN STEEL WORKS LTD
发明人： TAKENOUCHI TOMOO , ICHINOMIYA YOSHIAKI
IPC分类号： B22D23/10 , C22B9/18 , C22B9/187 , C22C1/02 , C22C19/03 , C22C30/00 , C22C33/04
摘要： PURPOSE:To produce the ingot of an Ni-Fe base superalloy free from componental segregation and having a good surface skin by using a hollow electrode having a specified dimensional shape by an Ni-Cr-Fe series alloy by an electroslag remelting method. CONSTITUTION:An electrode with a hollow cylindrical shape in which the inside diameter is regulated to 0.2 to 0.95 to the outside diameter is made of an alloy having a compsn. contg., to 2.00% Ti, 2.5 to 5.5% Nb and

5. 发明专利

JPS63255344A EXTRA HIGH PURITY SHAFT MATERIAL FOR TURBINE ROTOR 失效
公开(公告)号：JPS63255344A
公开(公告)日：1988-10-21
申请号：JP8871487
申请日：1987-04-13
申请人： JAPAN STEEL WORKS LTD
发明人： TAKENOUCHI TOMOO , IWANAMI YOSHIYUKI , ITAGAKI JUNJI
IPC分类号： C22C38/00 , C22C38/46 , C22C38/48 , F01D5/00 , F01D5/02
摘要： PURPOSE:To obtain an easily forgeable extra high purity shaft material for a turbine rotor by specifying a compsn. consisting of C, Ni, Cr, Mo, V, Mn, REM, Ga, Nb, Ta and Fe and by regulating the amts. of Si, P and S among the impurities in the compsn. CONSTITUTION:This extra high purity shaft material for a turbine rotor consists of, by weight,

6. 发明专利

JPS58209464A PRODUCTION OF LAMINAR COMPOSITE METALLIC PLATE MATERIAL 失效
公开(公告)号：JPS58209464A
公开(公告)日：1983-12-06
申请号：JP8976482
申请日：1982-05-28
申请人： JAPAN STEEL WORKS LTD
发明人： IWANAMI YOSHIYUKI , TANIGUCHI KOUZOU , FUNAZAKI MITSUNORI , TAKENOUCHI TOMOO
IPC分类号： B22D18/04 , B22D19/00 , B22D19/04 , B22D27/00
摘要： PURPOSE:To produce a composite metallic plate material effectively and remarkably inexpensively by installing a metallic plate for insert material in the prescribed position in a casting mold, and substituting the inside of the casting mold, which is closed tightly except the riser part, with an inert gas then lifting the molten metal of an outside enveloping material into the casting mold from the ladle in the lower part of the casting mold through an immersion pipe. CONSTITUTION:An insert material 1 is set in the prescribed position in a pressure casting mold 3 made of graphite by a hanger 2, the inside surface of which is coated uniformly with an alumina base coating material. The top surface except the very small part of a riser 4 is closed tightly and the inside of the mold 3 is replaced with an inert gas such as Ar in accordance with an ordinary preparatory plan for pressure casting, whereafter prescribed molten metal 8 for the outside circumference is filled quickly by pressure casting in the cavity between the material 1 and the circumference of the casting mold. More specifically, a ladle 5 holding the metal 8 is set in a pressurizing tank 6, and while an immersion tube 7 is held immersed in the metal 8, the tank 6 is pressurized to force the metal 8 into the mold 3. The material which has completed solidification is rolled to a prescribed thickness and in the case of, for example, three layers, the outside metallic part of the circumference is cut, whereby the intended laminar composite metallic material is obtained.

7. 发明专利

JPS55161546A CASTING METHOD OF CASTING HAVING NO DEPOSITION AND INCLUSION OF SCUM 失效
公开(公告)号：JPS55161546A
公开(公告)日：1980-12-16
申请号：JP6947279
申请日：1979-06-05
申请人： JAPAN STEEL WORKS LTD
发明人： HARA SADAO , TAKENOUCHI TOMOO
IPC分类号： B22C3/00
摘要： PURPOSE:To prevent the deposition and inclusion of scum on and into coating surface by coating the inside surface of the mold in contact with molten metal by volatile metal such as Zn or Ca or compound which becomes vapor by high-temperature decomposition. CONSTITUTION:Volatile metal such as Zn, Ca or Mg or compound which becomes vapor by high-temperature composition (for example, Ca3N2, Mg3N2) is coated on the inside surface of a sand mold 2 to form a surface coating material 1. Molten metal poured through an injection port 5 passes through cross gate 6, rises from the bottom of the mold and contacts the surface coating material 1. At this contacted time, the surface coating material becomes vapor after melting or decomposing, thereby flying the sucm 4 deposited on the mold surface. Hence, the deposition of scum on casting surface and the occurrence of sand flaws owing to scum inclusion are prevented.

8. 发明专利

JPS5328511A SLUG FOR DEPHOSPHORIZING AND DESULPHURIZING 失效
公开(公告)号：JPS5328511A
公开(公告)日：1978-03-16
申请号：JP10317876
申请日：1976-08-31
申请人： JAPAN STEEL WORKS LTD
发明人： TAKENOUCHI TOMOO , SUZUKI KOREAKI , ICHINOMIYA YOSHIAKI
IPC分类号： C21C7/076 , C21C7/00

9. 发明专利

JPH0663726A MANUFACTURE OF WORKING ROLL FOR COLD ROLLING 失效
公开(公告)号：JPH0663726A
公开(公告)日：1994-03-08
申请号：JP23760792
申请日：1992-08-14
申请人： JAPAN STEEL WORKS LTD
发明人： TAKENOUCHI TOMOO
IPC分类号： B21B27/00 , B22D23/10 , C22C38/00 , C22C38/18
摘要： PURPOSE:To increase the diameter for effective use of a roll by using hollow electrodes, and thereby obtaining a shallow and flattened shape of the molten pool, and thereby driving the streak-shaped segregation to be generated in the ESR ingot into the ingot in executing ESR of the semi high-speet steel working roll for cold rolling. CONSTITUTION:In a manufacturing method of a working roll for cold rolling, the roll has a composition consisting of by weight, 0.8-1.5% C,

10. 发明专利

JPH0647520A PRODUCTION OF RETAINING RING MATERIAL 失效
公开(公告)号：JPH0647520A
公开(公告)日：1994-02-22
申请号：JP22364292
申请日：1992-07-31
申请人： JAPAN STEEL WORKS LTD
发明人： TAKENOUCHI TOMOO , ISHIZAKA JUNJI , ITAGAKI JUNJI
IPC分类号： B22D23/10 , C22B9/18 , C22B9/187 , C22C38/00 , C22C38/38 , F01D11/00 , F01D25/00
摘要： PURPOSE:To effectively prevent the generation of segregation and to make a casting block surface excellent even at the time of producing an 18Mn-5Cr or 18Mn-18Cr base retaining ring material by an ESR method. CONSTITUTION:At the time of producing the 18Mn-5Cr or 18Mn-18Cr base retaining ring material, the ESR is executed by using a hollow electrode forming a hole along the axial direction in the core part of the electrode. Thus, the molten metal pool shape is made shallow and flat at the time of executing the ESR, and since the generation of the segregation is prevented, the ESR cast block having excellent internal characteristic is obtd. Therefore, the high quality retaining ring material can be produced.

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