Manufacture of wrought brass alloy with special properties

Details Manufacture of wrought brass alloy with special properties Manufacture of wrought brass alloy with special properties

C - Chemistry, Metallurgy

22

C

148/35, 75/66

C22C 9/04 (2006.01) C22F 1/08 (2006.01)

Patent

CA 1037843

ABSTRACT OF THE DISCLOSURE An improved ternary brass alloy includes silicon as the additive material. The composition limits of the constituents of the brass are fixed by two factors: (1) the Ms or Martensite transformation temperature, and (2) the brass must be a totally beta phase above 454° C. The composition may be betatized, that is, heated at approximately 800° C. and quenched at a fast rate so that the beta phase is retained in order to provide material having a shape memory effect, a low spring back coefficient and super elastic properties. A continuous betatizing and quenching process may be utilized in the manufacture of strip and sheet products. Alternatively, the composition may be hot worked between 600° and 700° C. and then cold worked to provide a material having a low spring back coefficient.

192013

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