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108results about How to "Accurate materials" patented technology

Preparation method of laminated composite materials of different alloys

The invention relates to a new preparation technique of composites, in details, i.e. a method of producing laminated composite materials of different alloys. In the preparation method, the bi-layer or multi-layer composites are prepared by means of the equal channel angular extrusion/pressure (ECAE/ECAP). Firstly, the appropriate alloys pairs or groups are selected, and the rational arrangements are carried out after pre-treating surfaces; then, the clad process is performed by extrusion and shear deformation in ECAE die; finally, the composite material is produced after one single pass or multiple passes clad extrusion. The annealing treatment can be performed subsequently to enhance the interfacial bonding strength by diffusion after the clad extrusion, and the heat treatment parameters consist of annealing temperature and holding time, which are chosen carefully to meet the demands of the refining microstructures and good properties for both the interfaces and individual component metals. Consequently, the layer-metal composite is produced with the firmly bonding interface, good microstructures and excellent properties. In the invention, the selection and assembling manners of the materials are very free, such as composites with bi-layer or interval multi-layer manners, and the method is suitable for most of the metal materials. The invention is a new method of fabricating composites and the preparation cost is low enough to meet the demand of large-scale industrial production.
Owner:INST OF METAL RESEARCH - CHINESE ACAD OF SCI

Raceway Ring for Radial Ball Bearing and Manufacturing Method Thereof, and Manufacturing Method of High Accurate Ring and Manufacturing Apparatus Thereof

A manufacturing method of a raceway ring for a radial ball bearing, the radial ball bearing has the raceway ring has at least one of an outer ring formed with an outer ring raceway, of which sectional shape is arcuate, and which is formed entire of circumference on an axially intermediate portion of an inner circumferential face as a raceway surface; and an inner ring formed with an inner ring raceway, of which sectional shape is arcuate, and which is formed entire of circumference on an axially intermediate portion of an outer circumferential face as the raceway surface and plurality of balls rollably provided between the inner ring raceway and the outer ring raceway. The manufacturing method of the raceway ring has a high accurate material working process of preparing a high accurate material of which volume is substantially the same as that of the raceway ring of the radial ball bearing which is a finished product by cold working and a raceway ring working process of plastically deforming the high accurate material by cold working and forming the raceway surface on the axially intermediate portion of either outer or inner circumferential face wherein working for removing material is not conducted before a heat treatment.
Owner:NSK LTD
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