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A kind of production process of 2618 alloy extruded bar with high heat resistance

A production process and high heat-resistant technology, applied in the field of alloys, can solve the problems of large deformation and difficulty in extruding 2618 alloys, and achieve the effects of high heat resistance, easy production process, and improved tensile properties at room temperature

Active Publication Date: 2019-07-26
SHANDONG NANSHAN ALUMINUM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the deformation heat treatment requires a large degree of cold deformation (such as 16% cold deformation) after quenching. For extruded materials, it is impossible to complete such a large amount of deformation at one time under the premise of ensuring the product's external dimensions.
Therefore, it is extremely difficult to improve the properties of 2618 alloy extrusions through heat treatment

Method used

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  • A kind of production process of 2618 alloy extruded bar with high heat resistance
  • A kind of production process of 2618 alloy extruded bar with high heat resistance
  • A kind of production process of 2618 alloy extruded bar with high heat resistance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) Alloy ingot heating: The heating temperature of the alloy ingot for 2618 alloy extrusion is 430°C, and the alloy composition of the alloy ingot used includes:

[0041] Si: 0.21%, Fe: 1.15%, Cu: 2.25%, Mg: 1.64%, Ni: 1.12%, Zn: 0.06%, Ti: 0.07%, and the balance is Al.

[0042] (2) Heating of mold and extrusion barrel: the heating temperature of the extrusion mold is 400°C, and the temperature control range of the extrusion barrel is 400°C.

[0043] (3) Extrusion: Put the mold and the alloy ingot with the required temperature into the extruder, adjust the extrusion rod speed so that the extruding speed of the rod is controlled at 0.5m / min for extrusion.

[0044] (4) Solution treatment: heat the extruded rod to 500°C±3°C for heat preservation, and the heat preservation time is 180min.

[0045] (5) Quenching treatment: quickly put the heat-insulated bar into water for cooling treatment, and the cooling water temperature is controlled at 80°C.

[0046] (6) Stretching: ...

Embodiment 2

[0049] (1) Alloy ingot heating: The heating temperature of the alloy ingot for 2618 alloy extrusion is 350°C, and the alloy composition of the alloy ingot used includes:

[0050] Si: 0.23%, Fe: 1.12%, Cu: 2.24%, Mg: 1.64%, Ni: 1.12%, Zn: 0.05%, Ti: 0.06%, and the balance is Al.

[0051](2) Die and extrusion barrel heating: the extrusion mold heating temperature is 480°C, and the temperature control range of the extrusion barrel is 450°C.

[0052] (3) Extrusion: put the mold and the alloy ingot whose temperature meets the requirements into the extrusion machine, adjust the extrusion rod speed so that the extrusion speed of the rod is controlled at 3.5m / min for extrusion.

[0053] (4) Solution treatment: heat the extruded rod to 530°C±3°C for heat preservation, and the heat preservation time is 80min.

[0054] (5) Quenching treatment: put the heat-preserved bar into water quickly for cooling treatment, and the cooling water temperature is controlled at 25°C.

[0055] (6) Stret...

Embodiment 3

[0058] (1) Alloy ingot heating: The heating temperature of the alloy ingot for 2618 alloy extrusion is 430°C, and the alloy composition of the alloy ingot used includes:

[0059] Si: 0.21%, Fe: 0.98%, Cu: 2.26%, Mg: 1.75%, Ni: 1.01%, Zn: 0.06%, Ti: 0.06%, and the balance is Al.

[0060] (2) Heating of mold and extrusion barrel: the heating temperature of the extrusion mold is 400°C, and the temperature control range of the extrusion barrel is 400°C.

[0061] (3) Extrusion: Put the mold and alloy ingot with the required temperature into the extruder, adjust the extrusion rod speed so that the extrusion speed of the rod is controlled at 2m / min to 2.5m / min for extrusion.

[0062] (4) Solution treatment: heat the extruded bar to 510°C±3°C for 140min.

[0063] (5) Quenching treatment: quickly put the heat-insulated bar into water for cooling treatment, and the cooling water temperature is controlled at 40°C.

[0064] (6) Stretching: Stretch the cooled 2618 alloy extruded rod by 4...

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Abstract

The invention provides a manufacturing technique of a high-heat-resistance 2618 alloy extrusion bar. The technique includes the following steps that (1) an alloy ingot made of a high-heat-resistance 2618 alloy material is heated; (2) a die and an extrusion barrel are heated; (3) the heated die and the ingot are added into an extrusion machine for extrusion; (4) the extruded bar is subject to solution treatment; (5) the bar obtained after solution treatment is subject to quenching; (6) the bar obtained after quenching is stretched; and (7) the stretched bar is subject to ageing treatment. The invention further provides the alloy ingot used in the method, the alloy ingot comprises, by weight percentage, the following components including 0.2%-0.25% of Si, 0.95%-1.18% of Fe, 2.2%-2.4% of Cu, 1.5%-1.8% of Mg, 0.95%-1.18% of Ni, not larger than 0.1% of Zn, 0.04%-0.1% of Ti and the balance Al.

Description

technical field [0001] The invention relates to the field of alloys, in particular to a high heat-resistant 2618 alloy, an extruded rod and a preparation method thereof. Background technique [0002] The 2618 alloy belongs to the 2-series aluminum alloy. Cu, Mg, Fe, and Ni elements in the alloy can significantly improve its heat resistance by forming a strengthening phase and a high-temperature stable phase. Generally, the mechanical properties of 2618 alloy at temperatures above 120 °C are higher than those of 7 series aluminum alloys. It is precisely because of the high temperature resistance of 2618 aluminum alloy that it has been widely used in important load-bearing components with high strength above 150 °C, such as engine blades and casings. [0003] As far as the existing aluminum extrusion processing technology level is concerned at home and abroad, the Brinell hardness of the 2618 alloy extrusion material after heat treatment in the T6 state is generally about 140...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/057C22C21/16C22C21/18
CPCC22C21/16C22C21/18C22F1/057
Inventor 程仁寨王兴瑞肖栋赵海滨
Owner SHANDONG NANSHAN ALUMINUM
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