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Simple, convenient and high-efficiency preparation method for high-strength ultrafine-grained metal wire

A metal wire and ultra-fine grain technology, which is applied in the field of preparation of high-strength ultra-fine grain metal wire, can solve the problems of high investment, difficult mass production, and large equipment footprint, and achieves simple equipment, wide application range, and ease of use. effect of operation

Inactive Publication Date: 2019-02-15
WUXI GUANGXU STEEL SHEET
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although SPD technology is widely used in the preparation of ultra-fine grains of various materials such as aluminum, copper, titanium, nickel metals and their alloys, pure iron, and low-carbon steel, it is limited by the complexity of the process and equipment requirements. There are still great difficulties in large-scale production of ultra-fine-grained metals with advanced technology; TMCP can realize large-scale production of ultra-fine-grained steel, but the equipment occupies a large area and requires high investment; other methods such as electrodeposition also have obvious limitations

Method used

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  • Simple, convenient and high-efficiency preparation method for high-strength ultrafine-grained metal wire
  • Simple, convenient and high-efficiency preparation method for high-strength ultrafine-grained metal wire
  • Simple, convenient and high-efficiency preparation method for high-strength ultrafine-grained metal wire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Pure iron wire with a diameter of 2.5 mm (purity 99.5%) was selected and drawn directly without low-temperature annealing. mm, 0.4 mm die drawing to obtain a large plastic deformation wire with a diameter of 0.4 mm. Then, after annealing at 510°C-600°C for 5 min-40 min for air-cooling treatment, ultra-fine grains of different sizes (average values) were obtained, such as Figure 1-2 As shown, the grain size ranges from 0.6 μm to 4.5 μm. The tensile strength of ultra-fine grain pure iron wire is as follows image 3 As shown, it can be as high as 900 MPa, which is more than three times that of ordinary pure iron.

Embodiment 2

[0040] A low-carbon steel with a diameter of 3.0 mm was selected and drawn after low-temperature annealing at 200 °C. 0.42 mm and 0.4 mm dies were drawn to obtain large plastic deformation wires with a diameter of 0.4 mm. Then, after annealing at 490°C-630°C for 30 min for air cooling treatment, ultrafine grains with different sizes (average values) were obtained, such as Figure 4-5 As shown, the grain size ranges from 0.52 μm to 4.05 μm. The tensile strength of ultra-fine grain low carbon steel wire is as follows Figure 6 As shown, the strength is significantly improved compared with ordinary low carbon steel, which can reach more than 550Mpa.

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Abstract

The invention discloses a simple, convenient and high-efficiency preparation method for a high-strength ultrafine-grained metal wire. The simple, convenient and high-efficiency preparation method forthe high-strength ultrafine-grained metal wire is characterized by comprising the following steps of (1) carrying out low-temperature pre-annealing treatment on a metal wire blank at the temperature being 200 DEG C to 400 DEG C for 2 to 5min; (2) drawing a metal wire obtained after low-temperature pre-annealing treatment; and (3) carrying out isothermal annealing treatment on the drawn metal wire,recrystallizing and growing crystalline grains, and obtaining ultrafine-grained metal with different grain sizes, wherein the isothermal annealing temperature is 490 to 1000 DEG C, and the treatmenttime is 5min to 40min. A device required by the simple, convenient and high-efficiency preparation method for the high-strength ultrafine-grained metal wire provided by the invention is simple, easy to operate, wide in application range, and capable of preparing different types of ultrafine-grained metal wires with different diameter specifications. According to the simple, convenient and high-efficiency preparation method for the high-strength ultrafine-grained metal wire provided by the invention, oversized plastic deformation can be realized, and the deformation rate reaches up to more than96 percent; and the method provided by the invention can be used for preparing nanocrystalline and even amorphous metal materials.

Description

technical field [0001] The invention relates to the technical field of metal material preparation, in particular to a simple and efficient method for preparing high-strength ultra-fine-grained metal wire. Background technique [0002] Metal structural materials represented by steel materials are widely used in construction, transportation, national defense and petrochemical equipment and other fields. Strength and plasticity are the two most important mechanical performance indicators of metal structural materials. High strength and high plasticity are the key to its high performance. Metal materials with high strength and high plasticity can realize the reduction, saving and safety of components, which is conducive to energy saving Consumption reduction, environmental protection. However, strength and plasticity are often a pair of contradictions, and it is difficult to balance them. Traditional strengthening methods such as solid solution strengthening, precipitation st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D8/06B21C37/04
CPCB21C37/047C21D8/065
Inventor 王永强赵昱张洁清叶乔庚孙丹凤
Owner WUXI GUANGXU STEEL SHEET