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

A technology of multi-pass drawing and process method is applied in the field of multi-pass drawing process for manufacturing magnesium and magnesium alloy filaments, which can solve the problems of complex manufacturing technology, small drawing deformation, oxidation of wire surface, etc. Achieve the effect of increasing the cumulative drawing deformation, reducing the static recrystallization temperature, and reducing the number of intermediate annealing

Inactive Publication Date: 2009-07-01
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

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

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Example Embodiment

[0015] Example 1:

[0016] A multi-pass drawing process for manufacturing magnesium and magnesium alloy filaments, the composition of which includes: selecting fine-grained magnesium or magnesium alloy wires with a diameter of Φ2-3mm as raw materials, lubricating the raw materials and wire drawing dies with grease lubricants, Then carry out cold drawing, the cold drawing speed is 120~150mm / s, the described cold drawing is carried out 5~12 times, recrystallization annealing, the annealing temperature is 400~420 ℃, the annealing time is 1~3 minutes, repeat The above process until the end.

[0017] In the multi-pass drawing process for manufacturing magnesium and magnesium alloy filaments, the average deformation between the two cold draws is controlled to 7-12%, and the accumulated deformation between the two annealing The amount of cold deformation is controlled at 50-60%, and the lubricant is vegetable oil.

[0018] Raw materials: choose Φ2mmAZ31 magnesium alloy wire, which ...

Example Embodiment

[0024] Example 2:

[0025] Raw material: AZ31 magnesium alloy Φ2mm wire rod, obtained by rolling process, the average grain diameter of the Φ2mm wire rod is 12μm.

[0026] Cold drawing lubricant: choose vegetable oil to spray mold and wire;

[0027] Cold drawing speed: 120~150mm / s;

[0028] The passes and deformations mainly controlled by the cold drawing process:

[0029]

[0030] From Φ2mm wire drawing to Φ0.22mm wire, a total of 4 times of annealing, each recrystallization annealing temperature is 400 ° C ± 5 ° C, annealing time is 120 to 60 seconds.

[0031] After the Φ0.22mm wire is annealed, the grain size is 1-2μm, the yield strength is 340-360MPa, the tensile strength is 410-432MPa, and the elongation is 10-16%.

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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,...

Claims

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Application Information

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IPC IPC(8): B21C1/12C21D9/52C21D11/00
Inventor 王尔德于洋杨德山刘祖岩
Owner HARBIN INST OF TECH
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