C - Chemistry – Metallurgy – 22 – C
Patent
C - Chemistry, Metallurgy
22
C
C22C 38/18 (2006.01) C21D 1/22 (2006.01) C22C 38/24 (2006.01) C22C 38/40 (2006.01) C22C 38/54 (2006.01)
Patent
CA 2698889
The invention relates to a martensitic stainless steel characterised in that it comprises in weight percent: - 0.22% < C < 0.32% - 0.05% < N < 0.15%, with 0.33% < C+N < 0.43% - 10% = Cr = 12.4% - 0.10% = V = 0.40% - 0.10% = Mo = 1.0% - traces < Ni = 1.0% - traces < Mn < 1.0% - traces < Si < 1.0% - traces = W = 1.0% - traces < Co < 1.0% - traces = Cu = 1.0% - traces < Ti < 0.010% - traces = Nb = 0.050% - traces = Al = 0.050% - traces < S < 0.020% - traces < O < 0.0040% - traces < P < 0.03% - traces < B < 0.0050% - traces < Ca < 0.020% - traces < Se < 0.010% - traces < La < 0.040% - traces < Ce < 0.040%, the balance consisting of iron and impurities resulting from the production. The invention also relates to a method for producing a part made of such a steel and to the part thus obtained, as a mould element for the production of plastic articles.
Acier inoxydable martensitique, caractérisé en ce qu'il comprend, en pourcenta- ges pondéraux : - 0,22% <= C <= 0,32% - 0,05% <= N <= 0,15%, avec 0,33% <= C+N <=0,43% - 10%<= Cr <= 12,4% - 0,10% <= V. ltoreq. 0,40% - 0,10% <= Mo <= 1,0% - traces <= Ni <= 1,0% - -traces <= Mn <= 1,0% - traces <= Si <= 1,0% - traces <= W <= 1,0% - traces <= Co <= 1,0% - traces <= Cu <= 1,0% - traces <= Ti <= 0,010% - traces <= Nb <= 0,050% - traces <= Al <= 0,050% - traces <= S <= 0,020% - traces <= O <= 0,0040% -- traces <= P <= 0,03% - traces <= B <= 0,0050% - traces <= Ca <= 0,020% - traces <= Se <= 0,010% - traces <= La <= 0,040% - traces <= Ce <= 0,040% le reste étant du fer et des impuretés résultant de l'élaboration. Procédé de fabrication d'une pièce en cet acier, et pièce ainsi obtenue, tel qu'un élément de moule pour la fabrication d'articles en plastique.
Aubert & Duval
Smart & Biggar
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