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

Leadless brass alloy excellent in stress corrosion cracking resistance
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.
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