Heat resistant spheroidal graphite cast iron, method of manufacturing the same and engine exhaust system part including the same
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United States of America Patent
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May 21, 2019
Grant Date -
Mar 16, 2017
app pub date -
Feb 6, 2015
filing date -
Mar 12, 2014
priority date (Note) -
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status (Latency Note)
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Abstract
Heat resistant spheroidal graphite cast iron having an improved high temperature tensile strength includes carbon (C) in a range of 3.2-3.4 wt %, silicon (Si) in a range of 4.3-4.8 wt %, manganese (Mn) in a range of 0.2-0.3 wt %, molybdenum (Mo) in a range of 0.8-1.0 wt %, vanadium (V) in a range of 0.4-0.6 wt %, chrome (Cr) in a range of 0.2-0.4 wt %, niobium (Nb) in a range of 0.2-0.4 wt %, inevitable impurities, and a remainder of iron (Fe) based on a total weight of the heat resistant spheroidal graphite cast iron. The heat resistant spheroidal graphite cast iron further includes barium (Ba) in a range of 0.0045-0.0075 wt %. A content ratio of chrome (Cr) and barium (Ba) (Cr/Ba) is in a range from about 26 to about 89.
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International Classification(s)
- H01J:ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- G01N:INVESTIGATING OR ANALYSING MATERIALS BY DETERMININ....
- F01N:GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHIN....
- B22D:CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY ....
- C21D:MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS....
- C21C:PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE....
- C22C:ALLOYS
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