C - Chemistry – Metallurgy – 22 – C
Patent
C - Chemistry, Metallurgy
22
C
C22C 38/60 (2006.01) B29C 45/26 (2006.01) C22C 38/42 (2006.01) C22C 38/44 (2006.01) C22C 38/46 (2006.01) C22C 38/58 (2006.01)
Patent
CA 2570440
The invention concerns mould or mould frame parts for plastic material injection moulding made of quenched and tempered martensitic stainless steel consisting, in wt. %, of: 0.02 % = C = 0.09 %, 0.025 % = N = 0.12 % with 0.05 % = C + N = 0.17 %; Si = 0.34 % Al = 0.080 % with Si + 23 Al = 0.20 % and Si + 0.6 Al = 0.25 %; and 0,00025 = AI x N = 0.0020 0;.55 % = Mn = 1 .8 %; 11 .5 % = Cr = 16 % optionally up to 0.48 % of copper, up to 0.90 % of the sum Mo + W/2, up to 0.90 % of nickel, up to 0,090 % of vanadium, up to 0.090 % of niobium, up to 0.025 % of titanium, optionally up to 0.25 of sulphur, the rest being iron and impurities derived from preparation, the composition further satisfying the condition: 6.5 = F = (Cr + Mo) + 2 (Si + V + Nb) - 27 (C + N) - (Ni + Mn/2 + Cu/3) = 13.
Pièce de moules ou de carcasses de moules pour le moulage par injection de matières plastiques en acier inoxydable martensitique, trempé et revenu, dont la composition comprend, en % en poids : 0,02 % <= C <= 0,09 % 0,025 % <= N <= 0,12 % avec 0,05 % <= C + N <= 0,17 % Si <= 0,34 % Al <= 0,080 % avec Si + 23 Al >= 0,20 % et Si + 0,6 Al <= 0,25 % et 0,00025 <= AI x N <= 0,0020 0,55 % <= Mn <= 1 ,8 % 11 ,5 % <= Cr <= 16 % éventuellement jusqu'à 0,48 % de cuivre, jusqu'à 0,90 % de la somme Mo + W/2, jusqu'à 0,90 % de nickel, jusqu'à 0,090 % de vanadium, jusqu'à 0,090 % de niobium, jusqu'à 0,025 % de titane, éventuellement jusqu'à 0,25 % de soufre, le reste étant du fer et des impuretés résultant de l'élaboration, la composition satisfaisant, en outre, la condition : 6,5 <= F = (Cr + Mo) + 2 (Si + V + Nb) - 27 (C + N) - (Ni + Mn/2 + Cu/3) <= 13
Beguinot Jean
Bouchaud Frederic
Pisseloup Jean
Industeel Creusot
Robic
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