Wrought brass alloy

Details Wrought brass alloy Wrought brass alloy

1975-05-27

1976-08-31

Stallard, W.

Metal treatment

Compositions

Heat treating

148 32, C22F 108, C22C 904

Patent

active

039779130

ABSTRACT:
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 M.sub.s or Martensite transformation temperature, and (2) the brass must be a totally beta phase above 454.degree.C. The composition may be betatized, that is, heated at approximately 800.degree.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.degree. and 700.degree.C. and then cold worked to provide mixed alpha plus beta material having a low spring back coefficient.

REFERENCES:
patent: 2394673 (1946-02-01), Edmunds
patent: 3567523 (1971-03-01), Jackson et al.
patent: 3594239 (1971-07-01), Wang
patent: 3783037 (1974-01-01), Brook et al.
patent: 3900349 (1975-08-01), Costas
patent: 3923555 (1975-12-01), Shapiro et al.
Transactions of the Met. Soc. of AIME, vol. 239, Oct. 1967, pp. 1668-1670.
Transactions of the Met. Soc. of AIME, vol. 236, Nov. 1966, pp. 1532 and 1533.
Metallurgical Transactions, vol. 1, Jan. 1970, pp. 251-258.
Metals Handbook, 1948, Ed., pp. 915-917.
Alloy Digest, Code Cu-106, Sept. 1961, Engineering Alloy Digest Inc., Upper Montclair, N.J.
The Casting of Brass Ingots, Genders, British Non-Ferrous Metals Res. Assoc., London 1934, pp. 152-153.

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