Abstract:
Eine Vorrichtung zum Härten der Zähne (2) von Zahnrädern durch induktive Wärmebehandlung sieht wenigstens zwei Härte-Induktoren (3) vor, welche um den Umfang verteilt angeordnet sind.
Abstract:
A thermal mechanical treatment method includes hot working a precipitation hardening martensitic stainless steel, quenching the stainless steel, and aging the stainless steel. According to certain embodiments, the thermal mechanical treatment does not include solution heat treating the stainless steel prior to aging or cryogenically cooling the stainless steel. An article includes a precipitation hardening martensitic stainless steel having a process history that includes hot working the stainless steel, quenching the stainless steel, and aging the stainless steel. According to certain embodiments, the process history does not include solution heat treating the stainless steel prior to aging or cryogenically cooling the stainless steel.
Abstract:
An apparatus (1) for heat treating the surfaces (32b) of gear teeth (32a) via magnetic inductive heating comprises a magnet assembly (40) and a workpiece (or gear) holder (30) operatively mounted on a base (12). The magnet assembly (40) is rotatable in a first plane about a first axis (A1), and the work-piece holder (30) (on which a gear (32) can be removably mounted) is rotatable about a second axis (A2) in a second plane. The first and second axes (A1, A2) are spaced apart from each other and the first and second planes intersect each other. The apparatus (10) includes a mechanism (16, 22) to move one (or both) of the magnet assembly (40) and the workpiece holder (30) relative to each other, such that the magnet assembly (40) and work piece holder (30) can be moved between a position in which the magnet assembly (40) and the gear (32) mounted on the work-piece holder (30) are in heating proximity to each other and a second position in which the magnet assembly (40) and gear (32) are out of heating proximity with each other.
Abstract:
A case hardened gear steel having enhanced core fracture toughness includes by weight percent about 16.3Co, 7.5Ni, 3.5Cr, 1.75Mo, 0.2W, 0.11C, 0.03Ti, and 0.02V and the balance Fe, characterized as a predominantly lath martensitic microstructure essentially free of topologically close-packed (TCP) phases and carburized to include fine M2C carbides to provide a case hardness of at least about 62 HRC and a core toughness of at least about 50 ksiVin.
Abstract:
Components, such as gears and other power transmission components, are formed by near-net-forging a high strength, high toughness ferrous metal alloy, surface processing metal alloy to form a hardened surface region (28), and coating the surface region with a lubricious coating (84) as shown in Figure 9.
Abstract:
A method of surface treating heat treated members to remove oxide scale. The heat treated members are subjected to a staged series of discrete chemical and physical cleaning steps yielding a substantially scale-free surface readily adaptable for subsequent application of protective coatings.
Abstract:
A method and apparatus are disclosed for cost-effective net shape precision ausform finishing the engagement surfaces of ball and roller bearings (50), for enhancing the surface strength and durability of bearing inner (42A) and outer (42B) races. The method consists of induction heating to austenitize the contacting surface layers of rolling element bearing races (42A, 42B), followed by martempering (or marquenching), and then net shape roll finishing of the induction heated contacting surface layers in the metastable austenitic condition to finished dimensional accuracy requirement, and finally cooling to martensite.
Abstract:
A face-gear forging die is constructed from a blank, and is cut to specification using a wire electrical discharge machining (EDM) process. The wire electrical discharge machining process is computer controlled, according to pre-specified instructions. The wire electric discharge machining process can also be used to cut the face gear tooth (47) directly, to thereby circumvent the forging procedure. The complex, curved surfaces of the face gear teeth (47) are mathematically approximated with a ruled surface, and the mathematical approximation is input to the wire electric discharge machining apparatus for subsequent execution and forming of the die.