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Process of making zinc-base alloy wire and rod with high strength and high toughness

A technology of alloy wire and manufacturing method, which is applied in the field of high-strength and high-toughness zinc-based alloy wire or bar manufacturing, can solve the problems of low elongation of materials and affect the wide application of high-strength zinc-based alloys, and achieve improved elongation, Improvement of strength and toughness, effect of high tensile strength

Active Publication Date: 2007-06-06
NINGBO POWERWAY ALLOY MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, as far as its preparation method is concerned, most of the research work is still limited to the casting process, which makes the elongation of the material low and seriously affects the wide application of high-strength zinc-based alloys.

Method used

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  • Process of making zinc-base alloy wire and rod with high strength and high toughness
  • Process of making zinc-base alloy wire and rod with high strength and high toughness

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] According to the ZA-27 zinc-based alloy formula (Al: 26.5%, Cu: 2.2%, Mg: 0.05%, Zn: the balance, all are weight percentages), the traditional induction melting is adopted. After 1 hour of heat preservation, it is extruded into a rod with a diameter of 12.5mm; after being drawn once to 11mm, annealed at 400°C for two hours, drawn for the second time to 9.5mm, and annealed at 400°C for two hours, The third time it was drawn to 8.1mm, and finally it was heat treated at 200°C for 1 hour and then water quenched to obtain the required wire. After testing, the tensile strength of the wire rod is 420 MPa, the Vickers hardness is 118, the elongation rate is 22%, and the area shrinkage rate is 62%. As shown in Figure 2, compared with the alloy of the comparative example, the structure of the alloy in the extruded state is obviously refined after drawing and low-temperature heat treatment. The elongation can be significantly improved after thinning.

Embodiment 2

[0019] According to the ZA-27 zinc-based alloy formula (Al: 28.5%, Cu: 2.0%, Mg: 0.03%, Zn: the balance, all are weight percentages), the traditional induction melting is adopted, and after 400 ℃ half After one hour of heat preservation, it is extruded into a rod with a diameter of 12.5 mm. After one drawing to 10.3 mm, the deformation of the cross-sectional area is 50%. After that, it is heat treated at 150°C for 60 minutes and then water quenched. The difference from Example 1 is that Example 2 uses only one drawing process without an annealing process, and the hot extrusion temperature is different. The bar has a tensile strength of 460 MPa, a Vickers hardness of 128, an elongation of 20%, and an area shrinkage of 60%.

Embodiment 3

[0021] According to the ZA-12 zinc-based alloy formula (Al: 10%, Cu: 1.0%, Mg: 0.05%, Zn: the balance, all are weight percentages), the traditional induction melting is adopted. After 1 hour of heat preservation, it is hot-extruded into a rod with a diameter of 8mm. After a deformation rate of 5% of the cross-sectional area each time, it is drawn 6 times into a wire with a diameter of 7mm. After heat treatment at 300°C for half an hour, it is water quenched. The difference from Examples 1 and 2 is that the formula (brand) of the alloy is changed, and the hot extrusion temperature and final heat treatment temperature are also different. The wire has a tensile strength of 408MPa, a Vickers hardness of 105, an elongation of 15%, and an area shrinkage of 58%.

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Abstract

The present invention relates to process of making zinc-base alloy wire and rod with high strength and high toughness. The production process includes the steps of providing zinc-base alloy material with Al content not less than 10 wt%, smelting, heat preservation and extruding at 300-450 deg.c, drawing, heat treatment at 150-300 deg.c for 30-120 min, and quenching. The production process can obtain zinc-base alloy wire and rod of different sizes for producing various mechanical parts, such as screw, nut, pull rod, wire, etc.

Description

technical field [0001] The invention relates to a method for manufacturing a zinc-based alloy wire or rod, in particular to a method for manufacturing a high-strength and high-toughness zinc-based alloy wire or rod. Background technique [0002] Zinc-based alloy is an important non-ferrous metal alloy, which has the characteristics of corrosion resistance, easy processing, and low raw material cost. It is widely used in the fields of machinery manufacturing and anti-corrosion materials. Zinc-based alloys have a low melting point and good fluidity. Generally, zinc-based alloy products adopt die-casting technology, that is, they are directly processed and formed from liquid to manufacture various devices with complex shapes. However, the cooling process of the zinc-based alloy material produced by the die-casting process is not uniform, so that the alloy is in a thermodynamic non-equilibrium state, and there will be processes such as precipitation and decomposition of the supe...

Claims

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Application Information

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IPC IPC(8): C22C18/04C22C1/02C22F1/16B21C1/00B21C23/08
Inventor 谢识才孙文声沈明郭俊翁玉斌
Owner NINGBO POWERWAY ALLOY MATERIAL
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