专利名称：METHOD FOR MANUFACTURING ANNULAR
MOLDED ARTICLE
发明人：KIKUCHI Hiroaki,TAKIZAWA Hideo,ISHIWARI
Yuji,OHSONE Jun
申请号：EP14775622.5申请日：20140328公开号：EP2979774A1公开日：20160203
专利附图：
摘要：The present invention is directed to a method for manufacturing an annularformed body comprising a forging step of forging an alloy piece to provide a forged
body having a disc shape, and a ring rolling step of ring-rolling an annular intermediatebody prepared by forming a through-hole in the forged body to provide an annularformed body, characterized in that the forging step comprises at least two hot forgingsteps, each of the hot forging steps being carried out under the conditions that a strainrate is at most 0.5 s, an absolute value εθ1 of strain to the forged body in its
circumferential direction is at least 0.3, an absolute value εh of strain to the forged bodyin its height direction is at least 0.3, and a ratio εh/εθ1 between the absolute values ofstrain is within a range from 0.4 to 2.5.
申请人：HITACHI METALS MMC SUPERALLOY, LTD.,HITACHI METALS, LTD.
地址：1230, Kamihideya Okegawa-shi, Saitama 363-8510 JP,2-1, Shibaura 1-chomeMinato-ku, Tokyo 105-8614 JP
国籍：JP,JP
代理机构：Killough, Kieran Paul
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