Preparation method of metal filament with high porosity

Abstract

The invention discloses a preparation method of a metal filament with high porosity. The preparation method comprises a first step of selecting a raw metal wire as a raw material; a second step of delivering the raw metal wire to a rough wire drawing machine to draw; a third step of immersing the metal wire in the sodium carbonate solution and then draining off; a fourth step of delivering the dried metal filament to a first annealing furnace to anneal; a fifth step of delivering the metal wire after the first annealing to the wire drawing machine to draw; a sixth step of immersing the metal filament in the sodium carbonate solution and then draining off for the second time; a seventh step of delivering the dried metal wire to a second annealing furnace to anneal; an eighth step of delivering the metal wire after the second annealing to a tiny wire drawing machine to draw; a ninth step of delivering the metal wire after the tiny wire drawing to a third annealing furnace to anneal, and then obtaining the metal filament. Diameter of the metal filament can reach 0.025 mm, the surface smoothness is good, the tear strength is high, and flexibility is good; moreover, the percentage elongation can reach 30%-40%; meanwhile, the porosity is more than 50%, aperture is less than 50Mum, and open hole rate is 90% above.

Description

technical field [0001] The invention discloses a method for preparing high-porosity metal filaments, and belongs to the technical field of production, preparation and application of metal filaments. Background technique [0002] Metal microwires are made of stainless steel wires, which have good effects of electromagnetic isolation, radiation protection, corrosion resistance, and memory setting. They have been widely used to make clothing, gauze scarves, tablecloths, decorative cloths, etc., and are loved by people; however, Metal microwires are used in clothing fabrics, which have very strict requirements on the flexibility, elongation, and tear strength of metal microwires. The current production process of metal microwires is rough, and the produced metal microwires have the following deficiencies: Disadvantages: the wire diameter of the metal microwire is too thick, generally above 0.05mm, and the flexibility is poor; the elongation of the metal microwire is low, general...

AI Technical Summary

Problems solved by technology

[0002] Metal microwires are made of stainless steel wires, which have good effects of electromagnetic isolation, radiation protection, corrosion resistance, and memory setting. They have been widely used to make clothing, gauze scarves, tablecloths, decorative cloths, etc., and are loved by people; however, Metal microwires are used in clothing fabrics, which have very strict requirements on the flexibility, elongation, and tear strength of metal microwires. The current production process of metal microwires is rough, and the produced metal microwires have the following deficiencies: Disadvantages: the wire diameter of the metal microwire is too thick, generally above 0.05mm, and the flexibility is poor; the elongation of the metal microwire is low, generally around 15%; the tear strength of the metal microwire is low; the surface finish of the metal microwire is poor ;The viscosity of the metal microwire is low, and it is difficult for the staff to release the wire when using it.

Due to the influence of factors such as the "arch bridge effect" of the powder, individual pores will be quite large after sintering, the pore distribution will be uneven, the pore size is difficult to control, and it is prone to collapse during sintering, and the shape of the material is difficult to maintain.

However, the porosity of porous materials usually pressed and sintered by powder is generally low, and the highest can only reach 40%.