| 摘要 |
PCT No. PCT/GB96/00532 Sec. 371 Date Dec. 4, 1997 Sec. 102(e) Date Dec. 4, 1997 PCT Filed Mar. 7, 1996 PCT Pub. No. WO96/28580 PCT Pub. Date Sep. 19, 1996Articles produced by a powder metallurgy process involving forming of a shape by compaction followed by sintering without the application of external pressure from a stainless steel alloy powder produced by rapid atomization followed by an annealing treatment, which powder consists essentially of in weight percent, chromium 14-30, molybdenum 1 to 5, vanadium 0 to 5, tungsten 0 to 6, silicon 0 to 1.5, carbon minimum as specified below to one fifth chromium content minus 2, other strong carbide forming elements such as Nb, Ta, Ti totaling together 0 to 5, the total of Mo, V and W being at least 3, the balance being iron including incidental impurities; the alloy powder (including any addition of free graphite powder mixed therewith before sintering having a sufficient carbon content to form carbides with all the Mo, V, W and other strong carbide forming elements present; the articles consisting of distribution of carbides embedded in a substantially ferritic matrix containing at least 12% by weight of chromium in solution, and which articles do not require further heat treatment.
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