Cemented carbide body and method for manufacturing the cemented carbide body
AssigneeSeco Tools AB
InventorsBo Jansson, Per Jonsson, Tomas Persson
Life of this patent
Estimating the term…
Abstract
A method for manufacturing a cemented carbide body includes the steps of forming a first part of a first powder composition comprising a first carbide and a first binder phase, sintering the first part to full density in a first sintering operation, forming a second part of a second powder composition comprising a second carbide and a second binder phase, sintering the second part to full density in a second sintering operation, bringing a first surface of the first part and a second surface of the second part in contact, and joining the first and second surface in a heat treatment operation.
Claims16
A method for manufacturing a cemented carbide body, comprising the steps of:
- forming a first part of a first powder composition having a first carbide and a first binder phase by injection moulding;
- sintering the first part to full density in a first sintering operation;
- forming a second part of a second powder composition having a second carbide and a second binder phase by uniaxial pressing;
- sintering the second part to full density in a second sintering operation;
- after sintering of the first and second parts, bringing a first surface of the first part and a second surface of the second part into contact;
- joining the first and second surface in a heat treatment operation;
- and
- performing the heat treatment operation for joining the first and second parts at a temperature where both the first binder phase and the second binder phase are in a liquid state for at least one minute.
A method for manufacturing a cemented carbide body, comprising the steps of:
- forming a first part of a first powder composition having a first carbide and a first binder phase by extrusion;
- sintering the first part to full density in a first sintering operation;
- forming a second part of a second powder composition having a second carbide and a second binder phase by uniaxial pressing;
- sintering the second part to full density in a second sintering operation;
- after sintering of the first and second parts, bringing a first surface of the first part and a second surface of the second part into contact;
- joining the first and second surface in a heat treatment operation;
- and
- performing the heat treatment operation for joining the first and second parts at a temperature where both the first binder phase and the second binder phase are in a liquid state for at least one minute.
A method for manufacturing a cemented carbide body, comprising the steps of:
- forming a first part of a first powder composition having a first carbide and a first binder phase by injection moulding;
- sintering the first part to full density in a first sintering operation;
- forming a second part of a second powder composition having a second carbide and a second binder phase by multiaxial pressing;
- sintering the second part to full density in a second sintering operation;
- after sintering of the first and second parts, bringing a first surface of the first part and a second surface of the second part into contact;
- joining the first and second surface in a heat treatment operation;
- and
- performing the heat treatment operation for joining the first and second parts at a temperature where both the first binder phase and the second binder phase are in a liquid state for at least one minute.
Dependencies are inferred from the claim text.