A method of producing a clad billet includes heating a corrosion resistant alloy (CRA) cylinder having a hollow interior to expand its inner diameter; inserting a solid carbon or low-alloy steel (CS) material into the hollow interior of the heated (CRA) cylinder so that an outer surface of the (CS) material faces the inner diameter of the (CRA) cylinder; cooling the (CRA) cylinder to contract and shrink the inner diameter of the (CRA) cylinder onto the outer surface of the (CS) material creating an interference fit at an interface with the outer surface, resulting in a composite billet assembly; and hot extruding the composite billet assembly to reduce its size and form the clad billet having a metallurgical bond between the (CS) material and the (CRA) cylinder. The clad billet can be hot-rolled to form metallurgically-bonded clad bar, or can be cold pilgered/cold drawn to form a metallurgically-bonded clad pipe.

The present disclosure provides a composite anode unit, comprising: a metal core rod; a metal layer coated on the metal core, wherein the metal layer is lead or lead alloy; a conductive ceramic layer coated on the metal layer, wherein the conductive ceramic layer comprises -PbO.sub.2Al.sub.2O.sub.3 composite oxide; an active ceramic layer is coated on the conductive ceramic layer, wherein the active ceramic layer comprises -MnO.sub.2Ti.sub.4O.sub.7 composite oxide. Methods for preparing the composite anode unit and an anode plate made from the composite anode unit are also provided.

The present disclosure provides a composite anode unit, comprising: a metal core rod; a metal layer coated on the metal core, wherein the metal layer is lead or lead alloy; a conductive ceramic layer coated on the metal layer, wherein the conductive ceramic layer comprises -PbO.sub.2Al.sub.2O.sub.3 composite oxide; an active ceramic layer is coated on the conductive ceramic layer, wherein the active ceramic layer comprises -MnO.sub.2Ti.sub.4O.sub.7 composite oxide. Methods for preparing the composite anode unit and an anode plate made from the composite anode unit are also provided.

A method of forming a fiber-reinforced composite part includes forming a composite preform by extruding a hollow metal shape onto a fiber-reinforced preform at an extrusion temperature and cooling the hollow metal shape from the extrusion temperature to a temperature less than the extrusion temperature. Heat from the hollow metal shape cooling from the extrusion temperature is conducted into the fiber-reinforced preform for curing thereof. Also, thermal contraction of the hollow metal shape onto the fiber-reinforced preform applies a consolidation pressure on the fiber-reinforced preform for curing thereof. The fiber-reinforced preform may be a hollow fiber-reinforced preform and a die can be moved through the hollow fiber-reinforced preform such that consolidation pressure is applied thereto by a combination of the thermal contraction of the hollow metal shape onto the hollow fiber-reinforced preform and the die moving through the hollow fiber-reinforced preform.

A shear assisted extrusion process for producing cladded materials wherein a cladding material and a material to be cladded are placed in sequence with the cladded material positioned to contact a rotating scroll face first and the material to be cladded second. The two materials are fed through a shear assisted extrusion device at a preselected feed rate and impacted by a rotating scroll face to generate a cladded extrusion product. This process allows for increased through wall strength and decreases the brittleness in formed structures as compared to the prior art.

A shear assisted extrusion process for producing cladded materials wherein a cladding material and a material to be cladded are placed in sequence with the cladded material positioned to contact a rotating scroll face first and the material to be cladded second. The two materials are fed through a shear assisted extrusion device at a preselected feed rate and impacted by a rotating scroll face to generate a cladded extrusion product. This process allows for increased through wall strength and decreases the brittleness in formed structures as compared to the prior art.

In this flat extruded aluminum multi-port tube, the corrosion-resistance, at inner surfaces of a plurality of flow passages independently and parallelly extending in the tube axial direction, is effectively enhanced. In a flat extruded aluminum multi-port tube 10 formed by an extrusion by employing an aluminum tube material and an aluminum sacrificial anode material having an electrochemically lower potential than the aluminum tube material, the aluminum sacrificial anode material is exposed to form a sacrificial anode portion 18 at least in a part of an inner circumferential portion in each of the plurality of flow passages 12.

In this flat extruded aluminum multi-port tube, the corrosion-resistance, at inner surfaces of a plurality of flow passages independently and parallelly extending in the tube axial direction, is effectively enhanced. In a flat extruded aluminum multi-port tube 10 formed by an extrusion by employing an aluminum tube material and an aluminum sacrificial anode material having an electrochemically lower potential than the aluminum tube material, the aluminum sacrificial anode material is exposed to form a sacrificial anode portion 18 at least in a part of an inner circumferential portion in each of the plurality of flow passages 12.

The invention relates to a method and a device for producing an extruded product. In the method an extrusion device is provided comprising: a container (7); a first container bore (5), formed in the container (7) and in which a first extrusion punch (10) is arranged; a second container bore (6), formed in the container (7) separately from the first container bore (5) and in which a second extrusion punch (11) is arranged; and a moulding tool (15) with a moulding cavity (14), which are connected to the first and the second container bore (5, 6). The method further comprises the following: arranging a first material billet (8) made of a first material (2) in the first container bore (5); arranging a second material billet (9) made of a second material (3) which differs from the first material (2) in the second container bore (6); and extruding an extruded product (1) in which the first and the second material (2, 3) are connected in a form-fitting and integrally bonded manner, comprising the following: feeding the first extrusion punch (10) in the first container bore (5) in such a manner that the first material (2) is thereby pressed into the moulding cavity (14) of the moulding tool (15) and thereby formed; feeding the second extrusion punch (11) in the second container bore (6) in such a manner that the second material (3) is thereby pressed into the moulding cavity (14) of the moulding tool (15) and thereby formed; and joining the first and second material (2, 3) in a form-fitting and integrally bonded manner to form an extruded product (1) in the moulding tool (15). A first feeding during feeding of the first extrusion punch (10) in the first container bore (5) and a second feeding during feeding of the second extrusion punch (11) in the second container bore (6) are controlled independently of one another.

The invention relates to a method and a device for producing an extruded product. In the method an extrusion device is provided comprising: a container (7); a first container bore (5), formed in the container (7) and in which a first extrusion punch (10) is arranged; a second container bore (6), formed in the container (7) separately from the first container bore (5) and in which a second extrusion punch (11) is arranged; and a moulding tool (15) with a moulding cavity (14), which are connected to the first and the second container bore (5, 6). The method further comprises the following: arranging a first material billet (8) made of a first material (2) in the first container bore (5); arranging a second material billet (9) made of a second material (3) which differs from the first material (2) in the second container bore (6); and extruding an extruded product (1) in which the first and the second material (2, 3) are connected in a form-fitting and integrally bonded manner, comprising the following: feeding the first extrusion punch (10) in the first container bore (5) in such a manner that the first material (2) is thereby pressed into the moulding cavity (14) of the moulding tool (15) and thereby formed; feeding the second extrusion punch (11) in the second container bore (6) in such a manner that the second material (3) is thereby pressed into the moulding cavity (14) of the moulding tool (15) and thereby formed; and joining the first and second material (2, 3) in a form-fitting and integrally bonded manner to form an extruded product (1) in the moulding tool (15). A first feeding during feeding of the first extrusion punch (10) in the first container bore (5) and a second feeding during feeding of the second extrusion punch (11) in the second container bore (6) are controlled independently of one another.