| Patent Number |
Title Of Patent |
Date Issued |
| 7416614 |
Method of gas carburizing |
August 26, 2008 |
| A method of gas carburizing is carried out at a carburizing temperature which is not higher than a peritectic point temperature at which .delta. iron and liquid phase are transformed into .gamma. iron and not less than a eutectic point temperature at which liquid phase is transformed int |
| 7112248 |
Vacuum carbo-nitriding method |
September 26, 2006 |
| A vacuum carbonitriding method includes: performing a vacuum carburizing process on an object to be treated (a workpiece) in a heat treating furnace under reduced pressures by supplying a carburizing gas into the furnace that has been heated to a predetermined carburizing temperature; |
| 7029540 |
Method of gas carburizing |
April 18, 2006 |
| In a first process of a method of gas carburizing, a steel treatment object in a carburizing atmosphere containing carburizing gas is heated to an initial set temperature which is not higher than a peritectic point at which .delta. iron and a liquid phase transform into .gamma. iron and |
| 7027722 |
Electric heater for a semiconductor processing apparatus |
April 11, 2006 |
| An electric heater has multiple zones, wherein the multiple zones include at least one zone which is subject to high loading (e.g. bottom zone) and, at least one zone is a non-metal heating element, and the rest of the zones (e.g. middle zone and top zone) are metal resistance heating |
| 7003014 |
Electric heater for thermal treatment furnace |
February 21, 2006 |
| A heating element (12) made of metal wire is installed at an internal circumferential surface of a cylindrical main thermal insulation body (11) of an electric heater according to the present invention. The heating element (12) comprises a plurality of resistance heat emitting portio |
| 6767504 |
Heat treatment furnace |
July 27, 2004 |
| In a heat treating method and furnace used in this method which can prevent disturbance of an atmosphere gas inside a heat chamber, and can prevent deterioration of the processing quality and efficiency of work, a control section 4 first operates a vacuum pump VP to reduce the inner pres |
| 6150643 |
Insulating material, electrical heating unit employing same, and manufacturing method therefor |
November 21, 2000 |
| The present invention is a heat insulating material being a single unit having superior insulating performance as well as sufficient mechanical strength itself to constitute furnace walls, an electric heating unit having the heat insulating material and a method of manufacture of the |
