Invention Grant
US08366840B2 Leadless brass alloy excellent in stress corrosion cracking resistance
有权
无铅黄铜合金,耐应力腐蚀开裂性优良
- Patent Title: Leadless brass alloy excellent in stress corrosion cracking resistance
- Patent Title (中): 无铅黄铜合金,耐应力腐蚀开裂性优良
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Application No.: US12448619Application Date: 2007-12-28
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Publication No.: US08366840B2Publication Date: 2013-02-05
- Inventor: Hidenobu Tameda , Kazuhito Kurose , Teruhiko Horigome , Tomoyuki Ozasa , Hisanori Terui , Masaru Yamazaki , Hideki Kotsuji
- Applicant: Hidenobu Tameda , Kazuhito Kurose , Teruhiko Horigome , Tomoyuki Ozasa , Hisanori Terui , Masaru Yamazaki , Hideki Kotsuji
- Applicant Address: JP Chiba
- Assignee: Kitz Corporation
- Current Assignee: Kitz Corporation
- Current Assignee Address: JP Chiba
- Agency: Wenderoth, Lind & Ponack, L.L.P.
- Priority: JP2006-355610 20061228; JP2007-119353 20070427; JP2007-211430 20070814
- International Application: PCT/JP2007/075329 WO 20071228
- International Announcement: WO2008/081947 WO 20080710
- Main IPC: C22C9/04
- IPC: C22C9/04

Abstract:
By enhancing a stress corrosion cracking resistance in a leadless brass alloy, specifically by suppressing a velocity of propagation of corrosion cracks in the brass alloy, a straight line crack peculiar to the leadless brass alloy is suppressed, a probability of cracks coming into contact with γ phases is heightened and local corrosion on the brass surface is prevented to suppress induction of cracks by the local corrosion, thereby providing a leadless brass alloy contributable to enhancement of the stress corrosion cracking resistance. The present invention is directed to an Sn-containing Bi-based, Sn-containing Bi+Sb-based or Sn-containing Bi+Se+Sb-based leadless brass alloy excellent in stress corrosion cracking resistance, having an α+γ structure or α+β+γ structure and having γ phases distributed uniformly therein at a predetermined proportion to suppress local corrosion and induction of stress corrosion cracks.
Public/Granted literature
- US20090297390A1 LEADLESS BRASS ALLOY EXCELLENT IN STRESS CORROSION CRACKING RESISTANCE Public/Granted day:2009-12-03
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