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Stabilization heat treatment process of wrought zn-al alloy

A stabilized heat treatment, Zn-Al technology, applied in the field of heat treatment of metal materials, can solve the problems of the deformation Zn-Al alloy stabilization heat treatment process, high process production cost, high efficiency, etc., to improve the dimensional stability of the alloy and comprehensive Mechanical properties, shortening the holding time, and the effect of shortening the time

Inactive Publication Date: 2011-12-21
CENT SOUTH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these two heat treatment processes are time-consuming, high in production cost, high in energy consumption, and slow in efficiency.
[0009] So far, there is no patent report on the stabilized heat treatment process for deformed Zn-Al alloys, let alone a short-time-consuming and high-efficiency stabilized heat treatment public technology report

Method used

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  • Stabilization heat treatment process of wrought zn-al alloy
  • Stabilization heat treatment process of wrought zn-al alloy
  • Stabilization heat treatment process of wrought zn-al alloy

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0040] The composition is Al 10%; Cu 2.5%; Ti 0.5%; Mg 0.02%, Bi 0.03%; the rest is zinc and unavoidable impurities (impurity content ≤ 0.15%) deformed Zn-Al alloy extruded rod in the resistance furnace Stabilization heat treatment was carried out in the middle, heated to 360°C with the furnace, kept for 20 minutes, then cooled to 260°C with the furnace, kept for 10 minutes, cooled to 140°C with the furnace, kept for 8 hours, and cooled to room temperature in air. Microstructural analysis and mechanical performance test of the alloy after heat treatment, see attached figure 2 , Compared with the comparative example, in the deformed Zn-10Al alloy structure after the stabilization heat treatment of this embodiment, the non-equilibrium β (ZnAl) phase basically disappears, and the copper-rich ε phase basically disappears. See Table 1 for the mechanical property indexes of the alloy after the stabilization heat treatment in this embodiment.

Embodiment 2

[0042] The composition is Al 10%; Cu 1.5%; Ti 0.5%; Mg 0.02%, Bi 0.03%; the rest is zinc and unavoidable impurities (impurity content ≤ 0.15%) deformed Zn-Al alloy extruded rod in the resistance furnace Stabilization heat treatment in the middle, heating to 340°C with the furnace, holding for 30min, then cooling to 225°C with the furnace, holding for 20min, then cooling to 90°C with the furnace, holding for 14h, air cooling to room temperature. Microstructural analysis and mechanical performance test of the alloy after heat treatment, see attached image 3 , compared with the comparative example, in the deformed Zn-10Al alloy structure after the stabilizing heat treatment in this embodiment, the non-equilibrium β (ZnAl) phase has undergone eutectoid reaction and transformed into α+η layer lamellar, cellular and granular structure, rich in Copper ε phase decreased. See Table 1 for the mechanical property indexes of the alloy after the stabilization heat treatment in this embod...

Embodiment 3

[0044] The composition is Al 10%; Cu 2.5%; Ti 0.5%; Mg 0.02%, Bi 0.03%; the rest is zinc and unavoidable impurities (impurity content ≤ 0.15%) deformed Zn-Al alloy extruded side in the resistance furnace Carry out stabilization heat treatment in the middle, heat up to 350°C with the furnace, hold for 25 minutes, then cool to 240°C with the furnace, hold for 15 minutes, then cool to 120°C with the furnace, hold for 10 hours, and air cool to room temperature. Microstructural analysis and mechanical performance test of the alloy after heat treatment, see attached Figure 4 , Compared with the structure of Example 1, the structure has not changed significantly. From the perspective of actual production, it is unnecessary to prolong the low-temperature annealing holding time. See Table 1 for the mechanical property indexes of the alloy after the stabilization heat treatment in this embodiment.

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Abstract

The invention relates to a deformation Zn-Al alloy stability heat treatment method, which comprises the following process steps of: heating materials or workpieces to 300 to 370 DEG C in a resistance furnace; carrying out heat insulation for a certain time according to the sizes of the materials or the workpieces; cooling the materials or the workpieces to 220 to 280 DEG C along with the furnace;carrying out heat insulation for 10 to 40min; cooling the materials or the workpieces to 70 to 150 DEG C along with the furnace; carrying out heat insulation for 6 to 16h; and then, carrying out air cooling to the room temperature. The invention adopts the stability heat treatment method of a tertiary annealing method, the tissue uniformity of the deformation Zn-Al alloy can be effectively improved, the dimension stability and the integral mechanical property of the deformation Zn-Al alloy are improved, the process is simple, the operability is high, the production efficiency is high, in addition, the obvious problems of long time consumption, low production efficiency, high cost and the like of the conventional deformation Zn-Al alloy conventional stability heat treatment method are solved, the solid theoretical basis and the technical guide are provided for the industrial production of the deformation Zn-Al alloy, and the method belongs to an efficient and feasible heat treatment method.

Description

technical field [0001] The invention relates to a stabilized heat treatment process for a deformed Zn-Al alloy, and belongs to the technical field of heat treatment of metal materials. Background technique [0002] Among non-ferrous metals, the reserves, output and consumption of zinc are second only to aluminum and copper, ranking third. my country is rich in zinc resources, but in the field of structural materials, the proportion of zinc and zinc alloys is still quite low, mainly because the basic research on wrought zinc alloys and their applications in my country is relatively weak. Zinc alloy is a non-ferrous alloy material produced by adding other elements to zinc as a matrix. It has the advantages of low melting point, good casting performance, excellent mechanical properties, short production process, low energy consumption, and cheap and easy-to-obtain raw materials. It has a wide range of applications. Especially now with the increasingly tight copper resources, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/16C21D1/26
Inventor 林高用王莉曾菊花张锐雷玉霞宋佳胜
Owner CENT SOUTH UNIV
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