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7591912 |
Induction heat treatment method, induction heat treatment installation and induction-heat-treated product
An induction heat treatment method with which temperature control is enabled, condition setting is easy, and the quality of a treatment object can be stabilized includes: a data acquiring step of...
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7220327 |
Kick-down drum material and method of manufacturing the same
Disclosed is a material of a kick-down drum comprising fine ferrite and microdispersion spheroidized cementite for an automobile also disclosed is a method for manufacturing the kick-down drum...
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6723020 |
Planetary carrier and method of manufacture
A planetary carrier supports pinion gears of a planetary gear set via pinion shafts. Each hole in which a pinion shaft is mounted has a shallow hardened wall surface that is hardened by...
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6685596 |
Variator disc and a method of fabricating the same
A blank for disc is heat treated for adjusting a surface hardness thereof to not less than Hv700. The blank has a spline hole thereof heated by high frequency heating while cooling a race thereof....
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6648995 |
Method of quenching workpiece with hole, assistive tool for use in quenching, and crankshaft
A ferrite core partly covered with ceramics members is loaded into an oil hole defined in a pin, and high-frequency induction hardening is effected on the pin while the ferrite core is being held...
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6402862 |
Method of hardening a bushing of a track chain
A method of hardening a work piece having (i) an outer surface, (ii) an inner surface which defines a passageway extending through the work piece, and (iii) an end. The method includes the steps of...
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6264768 |
Method for strengthening of rolling element bearings by thermal-mechanical net shape finish forming technique
A method and apparatus disclosed for cost-effective net shape precision ausform finishing the engagement surfaces of ball and roller bearings, for enhancing the surface strength and durability of...
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6048417 |
Method and apparatus for heat treating a bushing
Conventional methods for heat treating cylindrical components such as track bushings involve multiple steps. For example, many such methods consist of carburizing, cooling, induction-hardening,...
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5727317 |
Method of forming an outer ring of an axle bearing
An outer ring of an axle bearing is heat-treated and a through hole can be formed quickly and reliably. The outer ring has raceways on its inner periphery along which rolling elements roll. A...
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5488219 |
Induction heating coil assembly and method for hardening inner surface of cylinder by using the same
An induction heating coil for forming a hardened layer in the inner wall of an external cylindrical member to be heated is disclosed. On the inner wall of the conductive induction member, a...
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5215829 |
Method for strengthening pressure resistance of a hollowed metallic structure and a pressure resistant structure made thereby
A method for strengthening a pressure resistant property of a hollowed structure made of a metallic material and a pressure resistant hollowed structure made by such method. The method includes...
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4949758 |
Thin-walled small-bore steel tube with case hardened internal surface
The present invention relates to a process for hardening the interior surface of a long, thin-walled, small inside diameter, tubular member, such as a tube which would be used to form a downhole...
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4844752 |
Process for making internally hardened tubes
The present invention relates to a process for hardening the interior surface of a long, thin-walled, small inside diameter, tubular member, such as a tube which would be used to form a downhole...
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4652423 |
Magnetic induced heating for ferritic metal annealing
A nuclear reactor vessel has an electromagnet positioned within to generate the predetermined temperature for the vessel wall for a predetermined time to anneal the vessel.
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4531987 |
Method for inductively heat treating workpiece bore walls
A method and apparatus of quench hardening to a desired depth the full axial extent of the wall surface, or selected portions of the wall surface, of an axially extending bore in an elongated...
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4401485 |
Method for inductively heating thin-walled elongated workpieces
A method and apparatus of quench hardening to a desired depth the inner surface of an axially extending bore in an elongated, thin-walled workpiece having an outer, axially extending surface...
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4375997 |
Method of inductively heat treating a thin-walled workpiece to control distortion
In a preferred embodiment a surface layer of a thin-walled, hollow, cylindrical steel body is hardened while controlling thermal distortion by first heating with an inductor and quenching in one...
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3823927 |
METHOD AND APPARATUS FOR HARDENING IRREGULAR INTERNAL SURFACES
Method and apparatus are disclosed for induction hardening the inside surface of Wankel engine housings. The apparatus includes a rotatable, open top support container in which an engine housing to...
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2926112 |
Method of hardening the bores of cylindrical members
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3567529 |
Title is not available
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