| 摘要 |
The invention concerns a method for making a Fe-Ni strip whereof the chemical composition comprises, by weight: 36 % </= Ni + Co </= 43 %; 0 % </= Co </= 3 %; 0.05 % </= C </= 0.4 %; 0.2 % </= Cr </= 1.5 %; 0.4 % </= Mo </= 3 %; Cu </= 3 %; Si </= 0.3 %; Mn </= 0.3 %; the rest being iron and impurities, the alloy having an elastic limit Rp0.2 more than 750 Mpa and a distributed elongation Ar more than 5 %. The alloy is optionally recast under slag. The strip is obtained by hot-rolling above 950 DEG C, then cold-rolling and carrying out a hardening treatment between 450 DEG C and 850 DEG C, the hardening heat treatment being preceded by a reduction of at least 40 %. The invention is useful for making integrated circuit support grids and electron gun grids. |
