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An environmentally degradable heat-resistant high-strength zinc alloy and its preparation method and application

A zinc alloy, heat-resistant technology, applied in the field of environmentally degradable heat-resistant high-strength zinc alloy and its preparation, can solve the problems of not being able to better meet the use requirements, poor heat resistance and high-temperature strength of zinc alloy, etc. High temperature softening, good thermal stability and high melting point

Active Publication Date: 2022-05-17
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The technical problem solved by the invention is that the heat resistance and high temperature strength of existing zinc alloys are poor, and cannot better meet the use requirements

Method used

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  • An environmentally degradable heat-resistant high-strength zinc alloy and its preparation method and application
  • An environmentally degradable heat-resistant high-strength zinc alloy and its preparation method and application
  • An environmentally degradable heat-resistant high-strength zinc alloy and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-13

[0093] Composition, preparation and performance testing of degradable heat-resistant high-strength Zn-Ir binary zinc alloy.

[0094] The chemical compositions of 13 examples of the degradable heat-resistant high-strength zinc alloy are shown in Table 1-1. The preparation and processing flow of the zinc alloy is: casting→homogenizing heat treatment→equal channel angular extrusion.

[0095] Casting with a purity greater than 99.9%, and a single particle volume less than 8mm 3 The high-purity metal Zn and Ir are raw materials, according to the alloy composition of the embodiment shown in Table 1-1, batching is carried out, and the Zn-Ir series zinc alloy ingot is obtained by repeated melting twice in an induction heating furnace under the protection of argon; the melting temperature The temperature is 800°C, and the melting time is 10 minutes.

[0096] Homogenization heat treatment, the temperature is 380 ℃, keep warm for 10h and then furnace cool.

[0097] Equal channel angul...

Embodiment 14-23

[0117] Composition, preparation and performance testing of degradable heat-resistant high-strength Zn-Ir ternary zinc alloy.

[0118] The chemical composition of 10 examples of the degradable heat-resistant high-strength zinc alloy is shown in Table 2-1. The preparation and processing flow of the zinc alloy is: 3D printing → double-stage aging heat treatment.

[0119] Dosing according to the alloy composition of the example shown in Table 2-1, using the gas atomization method to prepare the spherical powder required for 3D printing. ) is 16s ~ 20s, and the average particle size is 300μm. 3D printing is a selective laser melting technology based on a high-energy-density heat source. The laser power is 200W, the spot diameter is 80μm, the scanning distance is 80μm, the scanning speed is 100mm / s, and the powder layer thickness is 60μm. In order to avoid sample oxidation and system damage To prevent pollution, argon gas is introduced into the molding chamber until the oxygen con...

Embodiment 24-31

[0138] Composition, preparation and performance test of degradable heat-resistant high-strength Zn-Ir series quaternary zinc alloy.

[0139] The chemical compositions of nine examples of the degradable heat-resistant high-strength zinc alloy are shown in Table 3-1. The preparation and processing flow of the zinc alloy is: casting→solution heat treatment→aging heat treatment→hot extrusion.

[0140] The casting has a purity greater than 99.9%, and a single particle volume is less than 4mm 3 The high-purity metal is used as the raw material, and the ingredients are prepared according to the alloy composition of the embodiment shown in Table 3-1. Under the protection of argon, the induction heating furnace is used to repeatedly smelt 5 times to obtain the Zn-Ir series quaternary zinc alloy ingot; the smelting process applies Electromagnetic stirring, the frequency is 5000HZ; the melting temperature is 760°C, and the melting time is 20min; in order to prevent the Zn liquid from bo...

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Abstract

The embodiment of the present invention provides an environmentally degradable heat-resistant high-strength zinc alloy and its preparation method and application, belonging to the technical field of zinc alloys. The zinc alloy contains 0.001 to 30% Ir, and other alloying elements may be further added. The zinc alloy of the present invention can be prepared through casting and deformation heat treatment steps, and can also be prepared through 3D printing and heat treatment steps. The zinc alloy of the present invention contains a fine dispersed second phase with high melting point, high hardness, and good thermal stability, which can effectively inhibit the recrystallization and grain growth of the zinc matrix, and overcome the disadvantage that pure zinc is easy to soften at high temperature; at the same time, these second Phase can significantly improve the high temperature strength, heat resistance and creep resistance of zinc alloy. The zinc alloy prepared by the invention has excellent heat resistance, high temperature strength and adjustable degradation rate, and can be applied to oil drilling and production downhole tools, hot-dip galvanized materials, electro-galvanized materials, building zinc materials, die-casting parts, and batteries Zinc materials, zinc materials for printing, zinc-based alloy solder, medical implant devices, etc.

Description

technical field [0001] The invention belongs to the technical field of zinc alloys, and relates to an environmentally degradable heat-resistant high-strength zinc alloy and a preparation method and application thereof. Background technique [0002] Zinc is chemically active and can degrade in the environment. In traditional applications, zinc is often used as a sacrificial anode material to protect the base metal against corrosion. Compared with the traditional degradable metals iron and magnesium, zinc has a moderate corrosion rate, and has attracted attention as a medical metal in recent years. However, the melting point of zinc is 419.5°C, and the dynamic recrystallization initiation temperature is about 15°C. Recrystallization can occur at room temperature, resulting in problems such as poor thermal stability and low creep resistance in pure zinc and most zinc alloys. their application. [0003] Patent document 1 (CN111621793A) discloses a high temperature resistant z...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C18/00C22F1/16B33Y10/00B33Y70/00C22C1/02C22C1/06
CPCC22C18/00C22C1/02C22C1/06C22F1/165B33Y10/00B33Y70/00
Inventor 石章智李猛王鲁宁
Owner UNIV OF SCI & TECH BEIJING
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