Method of producing the copper alloy contact wire

The invention provides copper alloy contact lines and a preparation method thereof. The method includes the following steps: (1) preparing Cu-Al master alloy powders, in which the content of Al is 0.21-0.53wt%, and the balance is copper; (2) using the Cu-Al master alloy powders obtained from step (1) to prepare an oxygen source of Al2O3-Cu2O, in which the weight ratio of Cu and AI keeps unchanged; (3) mixing the Cu-Al master alloy powders obtained from step (1) and the oxygen source of Al2O3-Cu2O obtained in step(2), wherein, the weight ratio of the oxygen source of Al2O3-Cu2O in the mixture is 10-25wt%; (4) carrying out internal oxidation and reduction treatment for the mixture obtained in step (3), so as to obtain alloy powders of Cu-Al2O3, in which the content of Al2O3 is 0.4-1.0wt%; (5) suppressing the alloy powders of Cu-Al2O3 obtained in step (4) into billets and then carrying out sintering treatment; (6) molding the suppressed and sintered billets obtained in step (5) into bars; ...

Copper alloy contact wire and method of producing the same

Precise extrusion molding method of thin wall long-pipe shaped parts bland and special mould

The invention belongs to an extrusion forming technique of non-ferrous materials. The precise extrusion forming technique of a thin-wall long-tube part blank comprises two procedures, namely, a primary reverse extrusion and a secondary reverse extrusion; the primary reverse extrusion obtains a primarily extruded tube blank (18) by adopting a primary male die (7) and a primary concave die (8) by virtue of a primary backing-out punch (4), the secondary reverse extrusion is carried out by adopting a secondary fixed male die (16), a secondary movable male die (12), a secondary concave die (6) by virtue of a secondary backing-out punch (14); the secondary movable male die (12) is placed into the primarily extruded tube blank (18), the secondary fixed male die (16) moves downward along the secondary movable male die (12) to extrude the primarily extruded tube blank (18), therefore, the secondary reverse extrusion is completed. The thin-wall long-tube part blank produced by adopting the technique ...

Ultra-high tension copper wire and method of producing the same

The invention provides copper wires with super high tension and a preparation method thereof, wherein, the method includes the following steps: (1) preparing Cu-AI master alloy bars with the AI content of 0.1-0.63wt%; (2) carrying out cold rolling treatment for the Cu-AI master alloy bars; (3) drawing the Cu-AI master alloy bars to obtain Cu-Ai alloy wires with a stated diameter; (4) carrying out internal oxidation treatment for the Cu-AI alloy wires to obtain alloy wires of Cu-Al2O3 with the basic content of Al2O3 as 0.2-1.2wt%; (5) drawing the alloy wires of Cu-Al2O3 to obtain the copper wires with super high tension having a required diameter. The copper wires with super high tension prepared by the method have good conductivity as well as high tensile strength and softening temperature. Thus the copper wires are applicable for advanced digital communications devices, high fidelity wires and voice coils, and water cooling copper wires or connectors used in ultra-high magnetic fields.

Precise extrusion molding method of thin wall long-pipe shaped parts bland and special mould

The invention belongs to an extrusion forming technique of non-ferrous materials. The precise extrusion forming technique of a thin-wall long-tube part blank comprises two procedures, namely, a primary reverse extrusion and a secondary reverse extrusion; the primary reverse extrusion obtains a primarily extruded tube blank (18) by adopting a primary male die (7) and a primary concave die (8) by virtue of a primary backing-out punch (4), the secondary reverse extrusion is carried out by adopting a secondary fixed male die (16), a secondary movable male die (12), a secondary concave die (6) by virtue of a secondary backing-out punch (14); the secondary movable male die (12) is placed into the primarily extruded tube blank (18), the secondary fixed male die (16) moves downward along the secondary movable male die (12) to extrude the primarily extruded tube blank (18), therefore, the secondary reverse extrusion is completed. The thin-wall long-tube part blank produced by adopting the technique ...

Ultra-high tension copper wire and method of producing the same

Extrusion forming process of thin-wall long pipe-shaped part blank with flange and mould

The invention belongs to extrusion forming technologies for non-ferrous metal materials and relates to a precise extrusion forming process of a thin-wall long pipe-shaped part blank with a flange. The forming process comprises two steps of primary backward extrusion and secondary forward extrusion, wherein in the step of primary backward extrusion, a primary backward extrusion convex mould (6) is utilized to match with a primary backward extrusion concave mould to together with a piece pusher (11) as an auxiliary for obtaining a primary backward extrusion pipe blank (17) with a web; a secondary forward extrusion convex mould consisting of a forward extrusion convex mould (14) and a mandrel (13) and a secondary forward extrusion concave mould (15) are utilized to carry out the secondary forward extrusion; and the secondary forward extrusion convex mould is placed into a primary backward extrusion pipe blank (18) and moves downwards to extrude the primary backward extrusion pipe blank (18 ...