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1. 发明专利

JP2001263957A VACUUM FURNACE 失效
公开(公告)号：JP2001263957A
公开(公告)日：2001-09-26
申请号：JP2000080534
申请日：2000-03-22
申请人： TOHO GAS KK , DAIDO STEEL CO LTD
发明人： HATTORI MASAO , SHIMIZU TOSHIHARU , SATO KENJIRO , MATSUBARA HIROKAZU
IPC分类号： C04B33/32 , B22F3/10 , F27B14/04 , F27B14/14 , F27D7/06
摘要： PROBLEM TO BE SOLVED: To obtain of a high-quality product by uniformly heating a material to be treated while achieving the quick cooling of the material efficiently. SOLUTION: A plurality of combustion type radiant tube heaters 34 facing the inside of a treating chamber 16 are arranged in a vacuum furnace 10 so as to be placed between heat insulating walls 14 and a material 18 to be treated. Heat transfer plates 36 whose size is set so as to be capable of covering whole of the surface of the material 18, which is opposed to the radiant tube heater 34, are arranged between the radiant tube heaters 34 and the material 18 in the treating chamber 16. Whole of the heat transfer plates 36 is heated by radiation from the radiant tube heaters 34 and whole of the material 18 is heated uniformly by the radiant heat of the heat transfer plates 36. Dampers 40 for regulating and controlling inert gas, which flows into the treating chamber 16, so as to flow toward the side of the material 18 mainly, are arranged at the lower ends of the heat transfer plates 36 so as to be capable of controlling the slanting of the dampers 40.

2. 发明专利

JP2001221577A VACUUM FURNACE 失效
公开(公告)号：JP2001221577A
公开(公告)日：2001-08-17
申请号：JP2000026823
申请日：2000-02-03
申请人： TOHO GAS KK , DAIDO STEEL CO LTD
发明人： HATTORI MASAO , SHIMIZU TOSHIHARU , NAKAMURA MASATOMO , SATO KENJIRO
IPC分类号： F23D14/12 , C21D1/34 , F27D7/06
摘要： PROBLEM TO BE SOLVED: To provide a vacuum furnace capable of uniformly heating an object and improving duration of a heater. SOLUTION: A recess 9 is formed on the inner surface of a heat insulating wall 4 in accordance with the shape of a heater, and the tubular heater 5 is disposed in the recess suitably remote from the inner surface thereof.

3. 发明专利

JP2001221575A VACUUM FURNACE 失效
公开(公告)号：JP2001221575A
公开(公告)日：2001-08-17
申请号：JP2000026583
申请日：2000-02-03
申请人： TOHO GAS KK , DAIDO STEEL CO LTD
发明人： HATTORI MASAO , SHIMIZU TOSHIHARU , NAKAMURA MASATOMO , SATO KENJIRO
IPC分类号： F27B5/04 , F27D7/06
摘要： PROBLEM TO BE SOLVED: To suppress deterioration of furnace member and products by early detecting defects in a radiant tube and taking counter measure. SOLUTION: An evaporation preventing gas is supplied into a vacuum chamber 12 through a gas supplying source and a gas supplying pipe 44. Inner pressure of the vacuum chamber 12 is detected by means of a vacuum pressure sensor 38, and the pressure data are inputted to a control unit 40. Volume of the evaporation preventing gas supplied into the vacuum chamber 12 is measured by a flow meter 46, and the data are inputted into the control unit 40. The control unit 40 adjusts volume of the evaporation preventing gas so as to keep inner pressure of the vacuum chamber 12 to a predetermined level based on the pressure data from the vacuum pressure sensor 38, and emergency is detected when the flow data from the flow meter 46 becomes less than the abnormal flow set preliminarily.

4. 发明专利

JP2001152244A OPERATION METHOD OF HEAT TREATMENT FURNACE 失效
公开(公告)号：JP2001152244A
公开(公告)日：2001-06-05
申请号：JP33510699
申请日：1999-11-25
申请人： TOHO GAS KK , DAIDO STEEL CO LTD
发明人： HATTORI MASAO , SHIMIZU TOSHIHARU , NAKAMURA MASATOMO , SATO KENJIRO
IPC分类号： B22F3/10 , C21D1/34 , C21D1/52
摘要： PROBLEM TO BE SOLVED: To obtain a high quality product by uniformly heating an object to be treated. SOLUTION: A first radiant tube 22 and a second radiant tube 23 apart at prescribed intervals in the furnace longitudinal direction are arranged inside a heat treatment chamber 13. The first radiant tube 22 and the second radiant tube 23 are respectively provided with a gas discharge part and a further having a heat exchanger with a heat accumulation body and a burner to the upper end of both straight parts 22a, 22b, 23a and 23b, a pair of burners arranged to the same tubes 22 and 23 are alternately kept on a burning state by a regenerative burner combustion system. In both radiant tubes 22 and 23, the total combustion quantity of the burners in outside straight parts 22a and 23a near a taking in mouth 14 or a taking out mouth 15 of the heat treatment chamber 13 is made larger than the total combustion quantity at the burners in the inside straight parts 22b and 23b near the furnace inside center.

5. 发明专利

JP2001152245A VACUUM FURNACE 失效
公开(公告)号：JP2001152245A
公开(公告)日：2001-06-05
申请号：JP33510799
申请日：1999-11-25
申请人： TOHO GAS KK , DAIDO STEEL CO LTD
发明人： HATTORI MASAO , SHIMIZU TOSHIHARU , NAKAMURA MASATOMO , SATO KENJIRO
IPC分类号： C04B35/64 , B22F3/10 , C21D1/34 , C21D1/40 , F23D14/12
摘要： PROBLEM TO BE SOLVED: To obtain a high quality product by uniformly heating an object to be treated. SOLUTION: A heat treatment chamber 12 is enclosed with a heat insulation wall 11 accommodated inside a vacuum furnace 10. A charging out/in mouth 14 of an object 13 to be treated into a furnace inside is arranged to a front furnace wall of the heat insulation wall 11, an opening/closing door 15 is arranged to be freely opened/closed to the charging out/in mouth 14. Inside the heat treatment chamber 12, radiant tubes 18 are respectively arranged at the position facing both left/right faces in the furnace width direction of the object 13 to be treated and a rear face. Electric resistant heaters 20 and 20 are arranged to both left/right sides in the furnace width direction interposing the charging out/in mouth 14 in the heat treatment chamber 12, the front face facing the charging out/in mouth 14 of the object 13 to be treated is auxiliary- heated by the heaters 20 and 20.

6. 发明专利

DE102007040858B4 Vakuum-Aufkohlungs-Vorrichtung und Verfahren zum Aufkohlen 未知
公开(公告)号：DE102007040858B4
公开(公告)日：2010-08-05
申请号：DE102007040858
申请日：2007-08-29
申请人： DAIDO STEEL CO LTD
发明人： SATO KENJIRO
IPC分类号： C23C8/20

7. 发明专利

DE102007040858A1 Vacuum carburizing device for steel, comprises carburizing chamber for material to be processed, vacuum pump, carburizing gas supply for the chamber in stroke operation, return pipe, opening- and closing valves, and control equipment 未知
公开(公告)号：DE102007040858A1
公开(公告)日：2009-03-05
申请号：DE102007040858
申请日：2007-08-29
申请人： DAIDO STEEL CO LTD
发明人： SATO KENJIRO
IPC分类号： C23C8/20
摘要： The vacuum carburizing device for steel, comprises a carburizing chamber (3) for a material to be processed, a vacuum pump, which sucks gas from the carburizing chamber to obtain a vacuum, a carburizing gas supply (4) for the carburizing chamber in a stroke operation, a return pipe (15), which connects an inlet side and an outlet side of the vacuum pump, opening- and closing valves (16) arranged in the flow of the return pipe, and a control equipment (20), which opens the opening and closing valve, when a supply of carburizing gas into the carburizing chamber is started. The vacuum carburizing device for steel, comprises a carburizing chamber (3) for a material to be processed, a vacuum pump, which sucks gas from the carburizing chamber to obtain a vacuum, a carburizing gas supply (4) for the carburizing chamber in a stroke operation, a return pipe (15), which connects an inlet side and an outlet side of the vacuum pump, opening- and closing valves (16) arranged in the flow of the return pipe, a control equipment (20), which opens the opening and closing valve, when a supply of carburizing gas into the carburizing chamber is started and closes the opening and closing valve when the carburizing gas supply ends, and a flow-quantity control valve (17), which is arranged in the flow of the return pipe and adjusts a quantity of the carburizing gas returned to the inlet side of the vacuum pump. An independent claim is included for a method for carburizing a material to be processed.

8. 发明专利

DE3267414D1 RADIANT TUBE 未知
公开(公告)号：DE3267414D1
公开(公告)日：1985-12-19
申请号：DE3267414
申请日：1982-07-13
申请人： DAIDO STEEL CO LTD , ECHIGO RYOZO
发明人： ECHIGO RYOZO , NODA TAKAAKI , KINTO KOICHIRO , SATO KENJIRO
IPC分类号： F23C3/00 , F23J15/00 , F23L15/00 , F23L15/04 , F23M20/00 , F28D7/12 , F28F13/00
摘要： A radiant tube (3) is heated by high-temperature gases supplied from its one end. The tube supplies a heat radiation by being thus heated. The gases used for the heating are discharged from the other end of the tube. Inside the tube a heat exchanger (18) is provided in the proximity of the gas outlet (5) of the tube so as to recover thermal energy from the used gases before they come out from the outlet.

9. 发明专利

JP2008045975A Carbon concentration distribution measuring method, and manufacturing method of carburized member using it 审中-公开
标题翻译：碳浓度分布测量方法和使用它的加热成员的制造方法
公开(公告)号：JP2008045975A
公开(公告)日：2008-02-28
申请号：JP2006221113
申请日：2006-08-14
申请人： Daido Steel Co Ltd , 大同特殊鋼株式会社
发明人： MORITA TOSHIYUKI , SATO KENJIRO
IPC分类号： G01N33/20 , G01N21/67 , G01N23/223
摘要： PROBLEM TO BE SOLVED: To provide a carbon concentration distribution measuring method capable of determining simply a carbon concentration distribution in a steel after carburization by nondestructive inspection, and a manufacturing method of a carburized member using it.
SOLUTION: In the measuring method, a regression curve showing in a dimensionless way a relation between the depth from the surface of the steel after carburization and the carbon concentration at the depth is assumed, and a carbon concentration axial direction of the regression curve is multiplied by (Q-P) and P is added thereto, and the depth axial direction of the regression curve is multiplied by (B-A)/{ρ×S×(Q-P)}, to thereby determine the carbon concentration distribution in the steel after carburization. In this case, Q is a surface carbon concentration (wt.%) in the steel after carburization; P is a surface carbon concentration (wt.%) in the steel before carburization; B is a steel weight (g) after carburization; A is a steel weight (g) before carburization; ρ is a density (g/m
3 ) of the steel; and S is a surface area (m
2 ) of the steel. The manufacturing method has an inspection process for determining the depth from the surface at which a constant carbon concentration is acquired by using the measuring method, and performing nondestructive inspection of the carburized member.
COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：解决问题的方法：提供一种碳浓度分布测量方法，其能够通过非破坏性检查简单地确定渗碳后的钢中的碳浓度分布，以及使用它的渗碳部件的制造方法。
解决方案：在测量方法中，假设以无量纲方式显示渗碳后的钢的表面深度与深度上的碳浓度之间的关系的回归曲线，并且回归的碳浓度轴向方向曲线乘以（QP）并加上P，并将回归曲线的深度轴向乘以（BA）/äρ×S×（QP）}，从而确定渗碳后钢中的碳浓度分布。在这种情况下，Q是渗碳后钢中的表面碳浓度（wt。％）。 P是渗碳前钢中的表面碳浓度（wt。％）; B是渗碳后的钢重量（g）; A是渗碳前的钢重量（g）; ρ是钢的密度（g / m 3 ）; S为钢的表面积（m 2 ）。该制造方法具有通过使用测定方法来确定从获得恒定碳浓度的表面的深度的检查处理，对渗碳部件进行非破坏性检查。版权所有（C）2008，JPO＆INPIT

10. 发明专利

JP2004249267A Method for preventing adherence of evaporated component of trapping apparatus and trapping apparatus 审中-公开
公开(公告)号：JP2004249267A
公开(公告)日：2004-09-09
申请号：JP2003053502
申请日：2003-02-28
申请人： Daido Steel Co Ltd , 大同特殊鋼株式会社
发明人： NAKAMURA MASATOMO , SATO KENJIRO , MATSUBARA HIROKAZU
IPC分类号： F23J3/04 , B01D8/00 , F27D17/00
摘要： PROBLEM TO BE SOLVED: To provide a method for preventing an adhesion of an evaporated component of a trapping apparatus capable of preventing the evaporated component of a treated material in an exhaust gas of a heating furnace from adhering to the cooling surface of the trapping apparatus and recovering the evaporated component without causing a decrease in recovering capability of the evaporated component due to the adhesion, and the trapping apparatus.
SOLUTION: In the trapping apparatus 5 cooling the exhaust gas G by a cooling surface 14 mounted on an exhaust gas duct of the heating furnace and recovering the evaporated component in the exhaust gas, the cooling surface 14 is covered with a liquid Q having a solidifying point lower than the temperature of the cooling surface 14, and the evaporated component condensed by cooling the exhaust gas G is mixed into the liquid Q to discharge from the trapping apparatus 5.
COPYRIGHT: (C)2004,JPO&NCIPI

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