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US 8,978,430 B2Granted
System and method for stainless steel cladding of carbon steel pieces
AssigneeCommercial Metals Company
InventorTimothy P. Zeien
Life of this patent
Estimating the term…
Abstract
A system and method of cladding a carbon steel piece with stainless steel according to which the carbon steel piece is cleaned, heated, coated with the stainless steel, and strengthened. In an exemplary embodiment, coating the carbon steel piece with the stainless steel includes melting the stainless steel, atomizing the melted stainless steel, and spraying the atomized stainless steel so that at least a portion of the atomized stainless steel is deposited on the carbon steel piece to thereby coat the carbon steel piece with the stainless steel.
Claims26
A method of cladding a carbon steel piece with stainless steel, the method comprising:
- conducting a first cleaning of the carbon steel piece using abrasive blasting;
- after conducting the first cleaning of the carbon steel piece using abrasive blasting, heating the carbon steel piece using induction heating;
- after heating the carbon steel piece using induction heating, coating the carbon steel piece with the stainless steel, wherein coating the carbon steel piece with the stainless steel comprises:
- melting the stainless steel;
- atomizing the melted stainless steel;
- and
- spraying the atomized stainless steel so that at least a portion of the atomized stainless steel is deposited on the carbon steel piece to thereby coat the carbon steel piece with the stainless steel;
- after coating the carbon steel piece with the stainless steel, conducting a first cooling of the carbon steel piece;
- and
- after conducting the first cooling of the carbon steel piece, strengthening the carbon steel piece.
7 more elements
A method of cladding a carbon steel piece with stainless steel, the method comprising:
- conducting a first cleaning of the carbon steel piece;
- heating the carbon steel piece;
- coating the carbon steel piece with stainless steel, wherein coating the carbon steel piece with the stainless steel comprises:
- melting the stainless steel;
- atomizing the melted stainless steel;
- and
- spraying the atomized stainless steel so that at least a portion of the atomized stainless steel is deposited on the carbon steel piece to thereby coat the carbon steel piece with the stainless steel;
- after coating the carbon steel piece with the stainless steel, conducting a first cooling of the carbon steel piece;
- after conducting the first cooling of the carbon steel piece, strengthening the carbon steel piece;
- after strengthening the carbon steel piece, conducting a second cooling of the carbon steel piece;
- and
- after conducting the second cooling of the carbon steel piece, conducting a second cleaning of the carbon steel piece.
9 more elements
A method of cladding a carbon steel piece with stainless steel, the method comprising:
- conducting a first cleaning of the carbon steel piece;
- heating the carbon steel piece;
- coating the carbon steel piece with the stainless steel, wherein coating the carbon steel piece with the stainless steel comprises:
- melting the stainless steel, wherein melting the stainless steel comprises melting two or more stainless steel wires using an electric arc;
- atomizing the melted stainless steel, wherein atomizing the melted stainless steel comprises passing through an atomizing passage an inert gas so that the inert gas contacts the melted two or more stainless steel wires;
- and
- spraying the atomized stainless steel so that at least a portion of the atomized stainless steel is deposited on the carbon steel piece to thereby coat the carbon steel piece with the stainless steel;
- and
- strengthening the carbon steel piece.
6 more elements
A method of cladding a carbon steel piece with stainless steel, the method comprising:
- conducting a first cleaning of the carbon steel piece;
- heating the carbon steel piece;
- coating the carbon steel piece with the stainless steel, wherein coating the carbon steel piece with the stainless steel comprises:
- melting the stainless steel;
- atomizing the melted stainless steel, wherein melting the stainless steel and atomizing the melted stainless steel are part of either an electrode induction melting gas atomization (EIGA) process or a plasma melting induction guiding gas atomization (PIGA) process;
- and
- spraying the atomized stainless steel so that at least a portion of the atomized stainless steel is deposited on the carbon steel piece to thereby coat the carbon steel piece with the stainless steel;
- and
- strengthening the carbon steel piece.
6 more elements
A method of cladding a carbon steel piece with stainless steel, the method comprising:
- conducting a first cleaning of the carbon steel piece;
- heating the carbon steel piece;
- coating the carbon steel piece with the stainless steel, wherein coating the carbon steel piece with the stainless steel comprises:
- melting the stainless steel;
- atomizing the melted stainless steel;
- spraying the atomized stainless steel so that at least a portion of the atomized stainless steel is deposited on the carbon steel piece to thereby coat the carbon steel piece with the stainless steel;
- strengthening the carbon steel piece;
- collecting stainless steel overspray;
- and
- recycling the collected stainless steel overspray.
7 more elements
A system for cladding a carbon steel piece with stainless steel, the system comprising:
- an inert atmosphere chamber;
- a first abrasive blasting station to clean the carbon steel piece;
- an induction heating station to heat the carbon steel piece;
- a spray coating station to coat the carbon steel piece with the stainless steel;
- and
- a peening station to strengthen the carbon steel piece;
- wherein each of the first abrasive blasting station, the induction heating station, the spray coating station, and the peening station, are disposed within the inert atmosphere chamber.
4 more elements
A method of cladding a carbon steel piece with stainless steel, the method comprising:
- conducting a first cleaning of the carbon steel piece;
- heating the carbon steel piece;
- coating the carbon steel piece with the stainless steel, wherein coating the carbon steel piece with the stainless steel comprises:
- melting the stainless steel;
- atomizing the melted stainless steel;
- and
- spraying the atomized stainless steel so that at least a portion of the atomized stainless steel is deposited on the carbon steel piece to thereby coat the carbon steel piece with the stainless steel;
- conducting a first cooling of the carbon steel piece;
- strengthening the carbon steel piece;
- and
- at least one of:
- conducting a second cooling of the carbon steel piece;
- and
- conducting a second cleaning of the carbon steel piece.
11 more elements
Dependencies are inferred from the claim text.