Wear resistant alloy containing residual austenite for valve seat insert
AssigneeAlloy Technology Solutions, Inc.
InventorXuecheng Liang
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Abstract
This invention related to a novel iron base alloy using residual austenite to improve wear resistance for valve seat insert material for internal combustion engines. The residual austenite is stable even after heat treatment and liquid nitrogen chilling. The alloy comprises of 2.0-4.0 wt % carbon, 1.0-3.0 wt % silicon, 0-4.0 wt % manganese, 3.0-9.0 wt % chromium, 5.0-15.0 wt % molybdenum, 3.0-15.0 wt % nickel, 0-6.0 wt % vanadium, 0-4.0 wt % niobium, 0-6.0 wt % cobalt, and the balance being iron with impurities.
Claims33
A wear resistant iron base alloy comprising:
- a) about 2.0 to about 4.0 wt % carbon
- b) about 3.0 to about 9.0 wt % chromium;
- c) about 1.0 to about 3.0 wt % silicon;
- d) about 0 to about 6.0 wt % cobalt;
- e) about 5.0 to about 15.0 wt % of molybdenum;
- f) about 7.0 to about 15.0 wt % nickel;
- g) about 0.0 to about 6.0 wt % vanadium;
- h) about 0.0 to about 4.0 wt % niobium;
- i) about 0 to about 4.0 wt % manganese;
- j) about 0 to about 6.0 wt % tungsten;
- k) the balance being iron, totaling 100% by weight.
A wear resistant valve insert comprising
- An iron base alloy comprising:
- a) about 2.0 to about 4.0 wt % carbon
- b) about 3.0 to about 9.0 wt % chromium;
- c) about 1.0 to about 3.0 wt % silicon;
- d) about 0 to about 6.0 wt % cobalt;
- e) about 5.0 to about 15.0 wt % of molybdenum;
- f) about 7.0 to about 15.0 wt % nickel;
- g) about 0.0 to about 6.0 wt % vanadium;
- h) about 0.0 to about 4.0 wt % niobium;
- i) about 0 to about 4.0 wt % manganese;
- j) about 0 to about 6.0 wt % tungsten;
- k) the balance being iron, totaling 100% by weight.
A wear resistant iron base alloy comprising:
- l) about 2.0 to about 4.0 wt % carbon
- m) about 3.0 to about 9.0 wt % chromium;
- n) about 1.0 to about 3.0 wt % silicon;
- o) about 0 to about 6.0 wt % cobalt;
- p) about 5.0 to about 15.0 wt % of molybdenum;
- q) about 3.0 to about 15.0 wt % nickel;
- r) about 0.0 to about 6.0 wt % vanadium;
- s) about 0.0 to about 4.0 wt % niobium;
- t) about 0 to about 4.0 wt % manganese;
- u) about 0 to about 6.0 wt % tungsten;
- v) the balance being iron, totaling 100% by weight;
- having a magnetic attraction force of about 90 or less after the alloy has been cast, heated to about 1100° F. for about one hour and subjected to liquid nitrogen.
Dependencies are inferred from the claim text.