A production process of a special-shaped silver-copper bar and the special-shaped silver-copper bar
A production process and special-shaped technology, which is applied in the manufacturing of electrical components, circuits, cables/conductors, etc., can solve the problems of uneven mechanical properties, unsatisfactory filling of small heads, uneven melt flow rate, etc., to ensure accuracy and mechanical properties, Ensure uniformity and ensure the effect of size
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Embodiment 1
[0046] This embodiment provides a production process for special-shaped silver-copper bars, including the following steps:
[0047] S1: Melting and alloying silver ingots and cathode copper to obtain a silver-copper alloy melt;
[0048] S2: The silver-copper alloy melt is treated by the up-drawing method to obtain an oxygen-free silver-copper alloy rod;
[0049] S3: Continuously extruding the silver-copper alloy rod to form a special-shaped silver-copper alloy billet;
[0050] S4: Drawing the silver-copper alloy billet at least once to obtain the finished silver-copper row;
[0051] Wherein, the first sizing band 22 of the extrusion die 1 used in the step S3 is convex, and the first sizing band 22 is located in the axial central area of the die, and is bent radially outward to form an arc-shaped outer convex portion 31, such as figure 2 shown.
[0052] In the above-mentioned extrusion die, since the first sizing belt 22 is convex, an arc-shaped outer convex portion 31 i...
Embodiment 2
[0067] This embodiment provides a production process for special-shaped silver-copper bars, which is a deformation based on Example 1. In this embodiment, the silver-copper alloy blanks are drawn at least once to obtain special-shaped silver-copper bars. In the step of finished copper bar, the second sizing band 7 of the drawing die 6 used is concave, such as image 3 As shown, the part of the second sizing belt 7 located in the axial central area of the mold is bent radially inward to form an arc-shaped inner concave portion 71, as shown in Figure 4 shown.
[0068] In the drawing die mentioned above, the size of the central part of the cavity formed by the second sizing belt 7 is smaller than the size of its two sides. In this way, during the specific drawing operation, although the center of the drawing die is under a large force, the metal filling The force is strong, but because the size of the cavity in the center is smaller than the size of the cavity on both sides, ...
Embodiment 3
[0070] This embodiment provides an extrusion die, such as figure 1 As shown, it includes: a mold base 1; a cavity 2, which is arranged on the mold base, and has an inlet 4 and an outlet 3; a first sizing belt 22, which is arranged on the mold base 1, and the sizing belt 12 is a convex The part of the first sizing belt 22 located in the pressure center area is bent radially outward to form an arc-shaped convex part 31, such as figure 2 shown.
[0071] Because the first sizing belt 22 is convex, the pressure center area is provided with an arc-shaped convex part 31, so that the inner diameter at this place is originally greater than the inner diameters on both sides. After deformation, all areas at the outlet of the sizing belt 33 can reach a flat Straight state, thereby ensuring the straight shape of the extruded product from the outlet, ensuring the precision of the extruded product and the uniformity of mechanical properties.
[0072] As a preferred embodiment, the mold b...
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