Title:
セルフタッピングねじを備える冷間圧延固定ねじ
Document Type and Number:
Japanese Patent JP2007521400
Kind Code:
A
Abstract:
Fixing screw formed by cold rolling consists of a material made from steel having a ferritic structure and further components having a higher carbon content compared with the carbon in the ferrite. The mixed structure has a carbon content of maximum 0.42 wt. % and a maximum grain size corresponding to at least 2000 grains/mm 2>, preferably 3000 grains/mm 2>, with inherent stresses maintained by he cold rolling.
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Inventors:
Friedrich, Heinrich
Smoke, Reinhard
Smoke, Reinhard
Application Number:
JP2006544233A
Publication Date:
August 02, 2007
Filing Date:
October 29, 2004
Export Citation:
Assignee:
EJOT GMBH & CO. KG
International Classes:
C22C38/00; C21D9/00; C22C38/02; C22C38/04; C22C38/12; C22C38/14; C22C38/38; F16B25/00; F16B35/00; B21H3/02; C21D7/10
Attorney, Agent or Firm:
Kuro Fukami
Toshio Morita
Yoshihei Nakamura
Yutaka Horii
Hisato Noda
Masayuki Sakai
Toshio Morita
Yoshihei Nakamura
Yutaka Horii
Hisato Noda
Masayuki Sakai