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6XXX series aluminum alloy bar extrusion and online quenching method

A technology for aluminum alloys and rods, applied in metal extrusion, metal extrusion control equipment, metal processing equipment, etc., can solve the problems of low yield of 6XXX series aluminum alloy rods, improve surface quality, and ensure quenching The effect of uniformity and uniform hardness

Inactive Publication Date: 2019-12-27
NORTHEAST LIGHT ALLOY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the technical problem of low yield of 6XXX series aluminum alloy bars produced by existing methods, and provides a method for extrusion and on-line quenching of 6XXX series aluminum alloy bars

Method used

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Examples

Experimental program
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Effect test

specific Embodiment approach 1

[0022] Specific embodiment 1: In this embodiment, a method for extruding and on-line quenching of 6XXX series aluminum alloy rods is carried out according to the following steps:

[0023] 1. Clean up the ingot:

[0024] Remove dust, aluminum shavings and oil stains on the surface of the ingot to obtain a cleaned ingot;

[0025] 2. Clean up extrusion tools:

[0026] Remove the residual aluminum in the extrusion barrel, and remove the metal attached to the extrusion shaft and die support;

[0027] 3. Set the temperature:

[0028] Set the temperature of the extrusion cylinder at 450°C to 500°C, and the heating temperature of the ingot at 500°C to 530°C;

[0029] 4. Extrusion:

[0030] Extrude the ingot heated to the set temperature in step 3, and control the extrusion speed to >1.8m / min under the condition of ensuring that the surface of the product has no peeling, no bubbles, and no cracks;

[0031] 5. Quenching:

[0032] Install the guide, control the temperature of the b...

specific Embodiment approach 2

[0033] Embodiment 2: This embodiment differs from Embodiment 1 in that: in step 3, the diameter of the extrusion barrel is 8 mm to 12 mm larger than the diameter of the ingot. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0034] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that in step 3, the temperature of the extrusion cylinder is set to 480°C, and the heating temperature of the ingot is set to 520°C. Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a 6XXX series aluminum alloy bar extrusion and online quenching method, and relates to the field of aluminum alloy bar extrusion and online quenching methods. The method aims to solve the technical problems that an existing method is unstable in 6XXX series aluminum alloy bar online quenching performance and low in yield. The method comprises the steps that 1, an ingot is cleaned; 2, an extrusion tool is cleaned; 3, the temperature of an extrusion cylinder and the ingot is set; 4, extrusion is conducted, wherein the extrusion speed is controlled to be larger than 1.8 m / min under the condition that the surface of a product is free of peeling, bubbles and cracks; and 5, quenching is conducted, wherein a guide passage is installed, the temperature of an extruded bar iscontrolled to be higher than 480 DEG C before the bar enters a quenching area, the distance between a bar guide-out port and the quenching area is smaller than or equal to 1 m, the bar is guided intothe quenching area, the temperature of quenching water is controlled to be lower than 40 DEG C, and the temperature of the bar going out of the quenching area is lower than 50 DEG C. The prepared baris uniform in hardness, the surface quality is improved, and the yield reaches 77%. The method is used for preparing the 6XXX series aluminum alloy bar.

Description

technical field [0001] The invention relates to the field of an aluminum alloy rod extruding on-line quenching method. Background technique [0002] With the rapid development of the national economy, the application of aluminum alloy extrusion products is becoming more and more extensive, especially the demand for industrial heat treatment can strengthen aluminum alloy bars is increasing, and the online quenching of industrial aluminum extrusion products is becoming more and more important. For 6XXX series aluminum alloys such as 6A02, 6063, 6082 in the Al-Mg-Si series, because they have low sensitivity to quenching cooling rate and self-quenching, it is an important way to realize online quenching on the extruder. [0003] In the online quenching process of 6XXX series aluminum alloy rods, the influence of extrusion speed and quenching temperature on the cooling effect is more obvious. In this process, if the control is not proper, it is easy to cause problems of uneven ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C23/08B21C31/00C21D11/00C21D9/00
CPCB21C23/002B21C23/08B21C31/00C21D9/0075C21D11/00
Inventor 王强满正良杨瑞青马月张燕飞于峰高宝亭项博文
Owner NORTHEAST LIGHT ALLOY CO LTD
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