Forging process of high-strength heat-proof magnesium alloy pipe

A magnesium alloy, heat-resistant technology, used in the petroleum industry, lubricating compositions, etc., can solve the problems of difficulty in preparing large-scale, high-quality and high-performance ingots, poor processing plasticity, and poor corrosion resistance, and achieve material utilization efficiency. High, small tolerance, the effect of improving comprehensive mechanical properties

Inactive Publication Date: 2016-02-24
贵州航天风华精密设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are still the following technical bottlenecks in the processing and preparation of large-scale high-performance magnesium alloy structural parts: low alloy strength, poor corrosion resistance, poor processing plasticity, difficulty in preparing large-scale high-quality high-performance ingots, and deformation due to temperature fluctuations. Uniform presence of severe anisotropy, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The present invention provides a high-strength heat-resistant magnesium alloy pipe fittings forging process. The weight percentages of each element in the alloy in the high-strength heat-resistant magnesium alloy pipe fittings are: Gd: 7-12%, Y: 3-7%, Zr: 0.3-0.6%, Zn0.35-0.55%, Mn0.05-0.20%, RE0.01-0.10%, the rest is Mg, and non-removable impurity elements <0.005%.

[0022] The forging process steps are as follows:

[0023] 1) Melt and cast the above alloy components into an ingot, and then at a temperature of 300°C, the pressure is 100N / mm 2 Keep it in the cylinder for 1 hour to form a cylindrical ingot with a radius of 100-1000mm and a length of 500-10000mm. Before starting, spray a layer of release agent in the cylinder;

[0024] 2) The cylindrical ingot is sawed and peeled with a turning knife to obtain the alloy ingot blank; the size of the alloy ingot blank is matched with the size of the working area of ​​the extrusion cylinder;

[0025] 3) Place the alloy ing...

Embodiment 2

[0031] The present invention provides a high-strength heat-resistant magnesium alloy pipe fittings forging process. The weight percentages of each element in the alloy in the high-strength heat-resistant magnesium alloy pipe fittings are: Gd: 7-12%, Y: 3-7%, Zr: 0.3-0.6%, Zn0.35-0.55%, Mn0.05-0.20%, RE0.01-0.10%, the rest is Mg, and non-removable impurity elements <0.005%.

[0032] The forging process steps are as follows:

[0033] 1) Melt and cast the above alloy components into an ingot, and then at a temperature of 350°C, the pressure is 300N / mm 2 Keep it in the cylinder for 24 hours to form a cylindrical ingot with a radius of 100-1000mm and a length of 500-10000mm. Before starting, spray a layer of release agent in the cylinder;

[0034] 2) The cylindrical ingot is sawed and peeled with a turning knife to obtain the alloy ingot blank; the size of the alloy ingot blank is matched with the size of the working area of ​​the extrusion cylinder;

[0035] 3) Place the alloy i...

Embodiment 3

[0041] The present invention provides a high-strength heat-resistant magnesium alloy pipe fittings forging process. The weight percentages of each element in the alloy in the high-strength heat-resistant magnesium alloy pipe fittings are: Gd: 7-12%, Y: 3-7%, Zr: 0.3-0.6%, Zn0.35-0.55%, Mn0.05-0.20%, RE0.01-0.10%, the rest is Mg, and non-removable impurity elements <0.005%.

[0042] The forging process steps are as follows:

[0043] 1) Melt and cast the above alloy components into an ingot, and then at a temperature of 330°C, the pressure is 200N / mm 2 Keep it in the cylinder for 1-24 hours to form a cylindrical ingot with a radius of 100-1000mm and a length of 500-10000mm, and spray a layer of release agent in the cylinder before starting;

[0044] 2) The cylindrical ingot is sawed and peeled with a turning knife to obtain the alloy ingot blank; the size of the alloy ingot blank is matched with the size of the working area of ​​the extrusion cylinder;

[0045] 3) Place the al...

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Abstract

The invention provides a forging process of a high-strength heat-proof magnesium alloy pipe. According to the forging process, alloy components are subjected to ingot manufacturing, high-pressure extrusion, initial alloy ingot blank manufacturing, high-pressure extrusion, hollow ingot blank manufacturing with a cored extrusion cylinder, aluminium alloy pipe manufacturing and aging treatment to obtain the high-strength heat-proof magnesium alloy pipe. The magnesium alloy pipe has good mechanical properties. when the deformation is greater than 20%, the total cross section of the magnesium alloy pipe can obtain a uniform structure; as the accumulated deformation increases further, more uniform and finer crystals can be obtained in combination with a proper forging process, the average crystal size is lower than 10 mu m, anisotropy is basically eliminated, and the comprehensive mechanical properties are improved remarkably. Meanwhile, through twice pressure extrusion, the finally manufactured magnesium alloy pipe is precise in structure and suitable for working in a high-pressure environment and has high strength and heat resistance.

Description

technical field [0001] The invention belongs to the field of aluminum alloy production, and in particular relates to a high-strength heat-resistant magnesium alloy pipe fitting forging process. Background technique [0002] Magnesium alloy has the advantages of low density, high specific strength and specific stiffness, good damping and shock absorption performance and electromagnetic shielding performance, and abundant resources. It has broad application prospects in aerospace, transportation, electronic information and other fields. Magnesium alloys are used in the field of aerospace, which can greatly improve the carrying capacity of aircraft. Therefore, vigorously researching and developing magnesium alloy processing and application technology has far-reaching strategic significance for giving full play to the advantages of my country's magnesium resources and enhancing my country's international status. At present, there are still the following technical bottlenecks in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C37/06B21C23/32C22C23/06B22D21/04C10M169/04C10N40/36
CPCB21C23/32B21C37/06B22D21/04C10M169/04C10N2040/36C22C23/06
Inventor 李翔光于丹俞开升敖四海谢懿陈春喜陈寅王昌明
Owner 贵州航天风华精密设备有限公司
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