Method of manufacturing cast iron components for industrial equipment
AssigneeEddy Pump Corporation
InventorsRobert GONZALEZ, Dan WAHLGREN
Life of this patent
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Abstract
Methods of manufacturing cast iron components having increased hardness are disclosed herein. In an example embodiment, a method of forming a cast iron component for industrial equipment includes forming the cast iron component in a predetermined shape, machining the cast iron component, heat treating the cast iron component by raising the temperature of the cast iron component to an upper temperature, and cryogenically heat treating the cast iron component by lowering the temperature of the cast iron component to a lower temperature.
Claims20
A method of forming a cast iron component for industrial equipment, the method comprising:
- forming the cast iron component in a predetermined shape;
- machining the cast iron component;
- heat treating the cast iron component by raising the temperature of the cast iron component to an upper temperature;
- and
- cryogenically heat treating the cast iron component by lowering the temperature of the cast iron component to a lower temperature.
A method of improving the hardness cast iron components for industrial equipment, the method comprising:
- forming a first cast iron component into a predetermined shape using a first liquid mixture, the first cast iron component having a first hardness;
- increasing a concentration of at least one element in a second liquid mixture in comparison to the first liquid mixture;
- forming a second cast iron component into the predetermined shape using the second liquid mixture, the second cast iron component having a second hardness greater than the first hardness;
- and
- further increasing the second hardness of the second cast iron component by cryogenically heat treating the second cast iron component by lowering the temperature of the cast iron component to a lower temperature.
A method of improving the hardness cast iron components for industrial equipment, the method comprising:
- forming a first cast iron component into a predetermined shape using a first liquid mixture;
- heat treating the first cast iron component by raising the temperature of the first cast iron component to a first temperature for a first duration, the first cast iron component having a first hardness after heat treatment;
- forming a second cast iron component into the predetermined shape using a second liquid mixture;
- heat treating the second cast iron component by raising the temperature of the second cast iron component to a second temperature for a second duration, the second cast iron component having a second hardness after heat treatment, the second hardness greater than the first hardness, at least one of the second temperature being lower than the first temperature and/or the second duration being less than the first duration;
- and
- further increasing the second hardness of the second cast iron component by cryogenically heat treating the second cast iron component by lowering the temperature of the cast iron component to a lower temperature.
Dependencies are inferred from the claim text.