Multi-pass drawing technological process for manufacturing magnesium and magnesium alloy filament

Abstract

The invention relates to a multi-pass drawing process method for manufacturing magnesium and magnesium alloy filaments. The prior production method has many middle annealing times, low production efficiency, low yield of a finished product, and high cost. The multi-pass drawing process method for manufacturing the magnesium and the magnesium alloy filaments comprises: a raw material of a fine crystal magnesium or magnesium alloy wire material with diameter of between phi 2 and 3 is selected; the raw material and a wire drawing mould are lubricated through a grease-type lube and are subjected to cold drawing for 5 to 12 times, and the cold drawing speed is between 120 and 150 mm / s; the raw material is recrystallized and annealed, the annealing temperature is between 400 and 420 DEG C, and the annealing time is between 1 and 3 minutes; and the process is repeated till the process is finished. The method is used for manufacturing the magnesium and the magnesium alloy filaments.

Description

Technical field: [0001] The invention relates to a multi-pass cold drawing process for magnesium and magnesium alloy filaments. Background technique: [0002] Magnesium is a metal rich in mineral resources on the earth's surface. Magnesium and magnesium alloys have strength equivalent to aluminum alloys and low-carbon steels, and are light in weight, only 2 / 3 of aluminum and 1 / 4 to 1 / 5 of steel. It has good electrical conductivity, electromagnetic shielding, damping and shock resistance, and can be recycled. It is known as the most promising lightweight structural material in the 21st century. [0003] Magnesium and magnesium alloy wires are used in a wide range of fields, such as welding wires, submarine cables, mobile cables, industrial and civil grids, reactor catalyst nets in the chemical industry, filters, medical magnesium alloy wires, etc., and have broad application prospects. [0004] Due to the poor plasticity of magnesium and magnesium alloys at room temperature,...

AI Technical Summary

Problems solved by technology

For example, the welding production line needs magnesium alloy welding wire, which needs to be hundreds of meters long, and the submarine cable needs to be 1,000 meters long. At present, the manufacturing technology of such long filaments is very complicated, the yield is low, and frequent intermediate annealing is required, and the amount of deformation per drawing It is very small. Generally, it is annealed once or twice after cold drawing. Now the wire material for special needs is carried out by this method, so the price is expensive. Generally, industrial production, such a price cost is too high to bear, which hinders the magnesium alloy. The application of magnesium and magnesium alloy filaments limits the production of magnesium and magnesium alloy wires. For this reason, the development of magnesium and magnesium alloy filaments with a length of hundreds of meters to thousands of meters has become a major milestone in the establishment of magnesium and magnesium alloy wires and Key technical problems in the wire industry

[0006] Traditional magnesium and magnesium alloy filaments are cold drawn 1 to 2 times, and the cumulative deformation is about 20%. After annealing, 1 or 2 times of cold drawing is required, so that if the wire is drawn from Φ2mm diameter to Φ0.3mm diameter For filaments, it needs about 20 times, 10-12 times of annealing in the middle, the drawing variation of each pass is less than 10%, the number of intermediate annealing is too many, and the relative deformation of drawing between two annealings is only about 20%. Complicated, many intermediate annealing times, low production efficiency, serious oxidation on the surface of the wire, easy to break the wire, it is very difficult to obtain a filament with a length of several hundred meters, the yield is extremely low, the cost is high, and the wire is expensive. It is impossible to form a large-scale production line, and the market price of magnesium and magnesium alloy filaments is 2 to 5 times higher than that of plates