| Document |
Document Title |
|
7357843 |
The present invention provides a vacuum heat treating method, such as carburization, carbonitridation, high temperature carburization, high concentration carburization and the like, performed while supplying a mixed gas of ethylene gas a...
|
|
7122086 |
A rolling support device excellent in both of the characteristics of durability and corrosion resistance is provided. The inner ring ( 1 ) and the outer ring ( 2 ) comprises an austenitic stainless steel and has, on a raceway surface, a ...
|
|
7118634 |
The invention relates to a low-pressure carburising method comprising alternating low-pressure enrichment steps and diffusion steps in the presence of a neutral gas. During the enrichment steps, an enriching gas and neutral gas mixture i...
|
|
7112248 |
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 he...
|
|
7108756 |
A method of producing a workpiece of a heat-resistant steel, such as hot forming tool steel, where the workpiece may be hardened and depassivated after mechanical machining and electrochemical treatment. The hardening including a reducti...
|
|
7033446 |
Vacuum carburizing of ferrous workpieces is performed at low pressure in a vacuum furnace using an unsaturated aromatic such as benzene as the carburizing medium. The unsaturated aromatic is gas phase hydrogenated into a napthenes, such ...
|
|
7029540 |
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 δ iron and a...
|
|
6364965 |
A method for producing an aluminum-containing member, comprising the steps of heating a substrate containing at least metallic aluminum in vacuum of not more than 10 −3 torrs, and continuing with the heating step, forming a nitride in...
|
|
6268045 |
The present invention relates to a component, for example a tool, coated with a hard material, in particular diamond, a process for its production and a device for carrying out the process. The process for the production of the component...
|
|
6221173 |
Disposing the titanium or titanium alloy in a vacuum vessel, and applying annealing treatment thereto by heating (a heating process); feeding a mixed gas consisting primarily of nitrogen with a trace of oxygen component into the vessel, ...
|
|
6187111 |
An improved vacuum carburizing method is provided which is easy to handle or to maintenance and low equipment costs without using hydrogen gas or acetylenic gas. The improved vacuum carburizing method comprises a carburizing treatment of...
|
|
6017401 |
A method of increasing conductivity of a refractory metal film disposed upon a substrate includes exposing the refractory metal film to an atmosphere comprising a silane of the form Si n H (2n+2), where n is a positive integer, while su...
|
|
5702540 |
In order to keep down soot production and to enable every part of the workpiece, including deep concavities to be uniformly carburized by vacuum carburizing, and to enable decreases in the quantities of gas and heat employed, carburizing...
|
|
5399207 |
A process and apparatus for forming a hardened outer shell (40) on a refractory metal workpiece (36) preferably heated in a fluidized bed of metallic oxide particles (38) in an environment of an inert gas and a reactive gas with the reac...
|
|
5205873 |
A low pressure carburization process for metal alloy parts uses a fuel mixture consisting of hydrogen with 2 to 60% by volume ethylene. The fuel mixture is heated to a temperature between 820° and 1100° C. A furnace installation for ca...
|
|
4853046 |
A heat treat process is disclosed for use in an ion glow discharge chamber for carburizing ferrous workpieces. The process provides rapid carburizing cycles by optimizing the power supplied to the glow discharge correlated to temperature...
|
|
4836864 |
A method of gas carburizing and hardening a steel article and a continuous furnace therefor. The method includes the steps of carburizing the article in a carburizing atmosphere at atmospheric pressure, heating the article in a vacuum fo...
|
|
4710238 |
A component formed of interstitial free steel is heated in a gaseous atmosphere containing 15% by volume of a nitrogen doner, e.g. ammonia, at about 500° C. to about 740° C. for about 30 minutes to about 4 hours to form an epsilon iron...
|
|
4568396 |
A method of making titanium alloy more resistant to sliding wear and fretting fatigue comprising the steps of: implanting carbon ions with at least one energy onto titanium alloy until at least 1×10 17 carbon ions/cm 2 have fallen ...
|
|
4455177 |
A continuous electric furnace for chemical heat treatment of steel parts comprises a parts heating chamber, a parts vertical supply chamber and a cooling chamber, all arranged in line. The parts vertical supply chamber is connected to a ...
|
|
4386973 |
A method of carburizing steel comprising carburizing steel under vacuum utilizing as the carburizing gas an aliphatic alcohol having 1 to 4 carbon atoms, preferably methanol and natural gas additions.
|
|
4326898 |
Material surfaces are provided which maintain their characteristic properties over long periods and which resist degradation by the environment in which they are utilized. The surfaces are formed by exposing a surface of atomically clean...
|
|
4191598 |
A method and apparatus for recirculation of atmosphere in a vacuum furnace which comprises a recirculation loop in which there is a low pressure line from the furnace chamber leading to a recirculation pump which pumps the recycled gas a...
|
|
4168186 |
A method and apparatus for the control of the carburizing of parts under vacuum in a vacuum furnace, with which as a carbon carrier a hydrocarbon gas is introduced controlled in the furance. As the control quantity a soot mist formation ...
|
|
4160680 |
A vacuum furnace is provided with subatmospheric pressure control of a diffusable media and with a fan at an end of a heated load chamber to circulate uniformly the diffusable media around the workpieces which are contained within the lo...
|
|
RE29881 |
A method and apparatus of vacuum carburizing by changing the surface chemistry of a metal article through absorption and thermal diffusion of carbon, wherein oxidizing gases and other impurities are initially removed from the chamber in ...
|
|
3266948 |
|
|
3037142 |
|
|
3011927 |
|
|
2565360 |
|
|
2170844 |
|
|
2015509 |
|
|
1893286 |
|
|
1854926 |
|
|
RE19936 |
|
|
3796615 |
|
|
3560271 |
|
|
3553038 |
|
|
1064671 |
|
