Title:
TREATMENT FOR SURFACE OF METALLIC MATERIAL
Document Type and Number:
Japanese Patent JP3093846
Kind Code:
B2
Abstract:
PURPOSE: To inexpensively form a rigid coated layer with a sufficient thickness free from defects such as dimensional changes, deterioration in the hardness (strength) of a base metal and film peeling caused by holding the temp. of the whole body of the metallic materials of a base metal to a high one.
CONSTITUTION: The surface of a base metal constituted of metallic materials is coated with metallic or nonmetallic materials. After that, the deposits are remelted for each minute area by pulse electric discharge machining in liq., gas or vacuum, by which the base metal and the coated materials, are diffused and mixed to form a dense coated layer on the surface of the base metal. As the coating materials, metals, alloys, nonmetallic elements, ceramics, carbides, nitrides, borides or the like are used. As the coating means for the coating materials, a thermal spraying method, an electrodepositing method, a low temp. depositing method, a discharge precipitating method using an electrode easy to consume or the like are used. As for the pulse electric discharge machining, it is executed preferably by using an electrode hard to consume as a minus electrode. The material called as a functionally gradient material in which the coating of the coating materials and pulse electric discharge machining are executed per layer and the coated layer is provided with gradient properties can also be manufactured.
Inventors:
Saito
Naotake Mori
Naotake Mori
Application Number:
JP32949991A
Publication Date:
October 03, 2000
Filing Date:
November 18, 1991
Export Citation:
Assignee:
Japan Science and Technology Agency
International Classes:
B22F3/24; C21D1/38; C23C10/28; C23C12/02; C23C26/00; C25D5/50; (IPC1-7): C23C10/28; B22F3/24; C21D1/38; C23C12/02; C23C26/00; C25D5/50
Domestic Patent References:
| JP196387A |
Attorney, Agent or Firm:
Wataru Ogura