METHOD FOR PRODUCING STARTING MATERIAL FOR CUTTING
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United States of America Patent
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Issued Date -
Apr 21, 2016
app pub date -
Jul 1, 2014
filing date -
Jul 4, 2013
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Abstract
A method for producing a starting material for cutting capable of sufficiently eliminating residual stress is provided. The present invention is for producing a starting material for cutting which is a starting material for cutting to be cut/machined into a cut/machined product. The present invention includes a step for obtaining a primary molded article (1) by subjecting a molding material to primary forming, a step for subjecting the primary molded article (1) to a solution treatment and then quenching processing, and a step for subjecting the primary molded article (1) to secondary forming by cold forging after performing the quenching treatment, and obtaining a secondary molded article (2) as a starting material for cutting. The shape of the primary molded article (1) is determined in a manner as to eliminate the residual stress accumulating in the primary molded article (1) by the secondary forming.
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