Austenitic stainless cast steel with wear resistance
AssigneeIHI Corporation
InventorsMasahito OMIYA, Yohei SAKAKIBARA, Tomomichi OZAKI, Tomomi KOKETSU, Takahiro YAMAZAKI
Life of this patent
Estimating the term…
Abstract
Austenitic stainless cast steel includes 21 to 28% by weight of Chromium, 14 to 23% by weight of Nickel, 2.0 to 3.5% by weight of Tungsten, 1.0 to 3.0% by weight of Niobium, 1.5 to 3.5% by weight of Molybdenum, 0 to 3.5% by weight of Copper, 0.6 to 1.1% by weight of Carbon, 0.1 to 0.7% by weight of Nitrogen, 1.0 to 2.0% by weight of Manganese, 0.4 to 0.7% by weight of Sulfur, 2.5 to 4.0% by weight of Silicon, and Iron as the balance.
Claims14
Austenitic stainless cast steel comprising, based on a total amount of the austenitic stainless cast steel:
- 21 to 28% by weight of Cr;
- 14 to 23% by weight of Ni;
- 2.0 to 3.5% by weight of W;
- 1.0 to 3.0% by weight of Nb;
- 1.5 to 3.5% by weight of Mo;
- 0 to 3.5% by weight of Cu;
- 0.6 to 1.1% by weight of C;
- 0.1 to 0.7% by weight of N;
- 1.0 to 2.0% by weight of Mn;
- 0.4 to 0.7% by weight of S;
- 2.5 to 4.0% by weight of Si;
- and
- Fe.
A method of determining a composition of austenitic stainless cast steel, the method comprising:
- obtaining a volume fraction of eutectic carbides based on an amount of Si;
- obtaining a volume fraction of MnS to be crystallized based on amounts of Mn and S;
- and
- obtaining a predicted wear amount based on the volume fraction of eutectic carbides and the volume fraction of MnS.
Austenitic stainless cast steel consisting of, based on a total amount of the austenitic stainless cast steel:
- 21 to 28% by weight of Cr;
- 14 to 23% by weight of Ni;
- 2.0 to 3.5% by weight of W;
- 1.0 to 3.0% by weight of Nb;
- 1.5 to 3.5% by weight of Mo;
- 0 to 3.5% by weight of Cu;
- 0.6 to 1.1% by weight of C;
- 0.1 to 0.7% by weight of N;
- 1.0 to 2.0% by weight of Mn;
- 0.4 to 0.7% by weight of S;
- 2.5 to 4.0% by weight of Si;
- and
- Fe.
Dependencies are inferred from the claim text.