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Fast extrusion method of ZK60 magnesium alloy profile

An extrusion method and magnesium alloy technology, which is applied in the direction of metal extrusion, metal extrusion control equipment, metal processing equipment, etc., can solve the problems of restricting the expansion of application range, low production extrusion speed, and thermal cracks on the profile surface , to achieve the effect of preventing periodic extrusion cracks or oxidation, avoiding local overheating, and preventing profile fracture

Inactive Publication Date: 2015-01-07
NEW MATERIAL INST OF SHANDONG ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The performance of the commercial magnesium alloy ZK60 itself determines that under conventional extrusion conditions, too fast extrusion speed will cause the profile temperature to rise rapidly, and the profile surface is prone to periodic thermal cracks, or the profile surface is oxidized and blackened, so the actual production The extrusion speed is very low, generally less than 1m / min, such low production efficiency increases the cost of ZK60 magnesium alloy and restricts the expansion of its application range
Therefore, up to now, a kind of rapid extrusion method of ZK60 magnesium alloy profiles has not been seen yet.

Method used

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  • Fast extrusion method of ZK60 magnesium alloy profile

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] ZK60 magnesium alloy profile rapid extrusion method, the steps of the method are as follows:

[0024] 1. The section shape of the profile is circular with a diameter of 20mm. Design and manufacture extrusion die 5 and cooling pipe 6 according to ZK60 magnesium alloy profile cross section, select 800 ton extrusion machine, extrusion barrel 2 diameter is 125mm; extrusion ratio is 39;

[0025] 2. According to the composition requirements of ZK60 magnesium alloy, the ZK60 magnesium alloy cast rod 4 with a diameter ratio of 125mm is capacity-cast, and it is homogenized in a heat treatment furnace, and the surface scale is removed by 1-2mm. The temperature is 350℃~450℃, and the time is 12~32h;

[0026] 3. Preheat the extrusion shaft 1, extrusion barrel 2, extrusion pad 3, magnesium alloy cast rod 4, extrusion die 5, the preheating temperature is 300 ° C ~ 450 ° C, and install the extrusion die 5 to the extrusion On the machine, connect the thermocouple and the mold cooling ...

Embodiment 2

[0029] The cross-section of the profile is changed to a square, the cross-sectional size is 10mm×10mm, the cooling medium used is heat transfer oil, and the rest are the same as the steps of embodiment 1.

Embodiment 3

[0031] The cross-section of the profile is changed to a rectangle, the cross-sectional size is 20mm×5mm, the cooling medium used is water, and the rest of the steps are the same as in Example 1.

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Abstract

The invention discloses a fast extrusion method of a ZK60 magnesium alloy profile, and aims to increase an extrusion speed of the commercial ZK60 magnesium alloy profile and prevent common extrusion cracks from being generated on the profile surface during hot extrusion simultaneously. The hot extrusion method is adopted for producing the ZK60 magnesium alloy profile, a cooling channel is arranged on an extrusion die, and a cooling medium passes through the extrusion die to cool the extrusion die in the extrusion process; and meanwhile, thermoelectric couples are arranged on the extrusion die for temperature measurement, and a flow control valve is adopted to regulate the flow of the cooling medium online, so that the temperature change range of the die in the extrusion process is plus or minus 5 DEG C, mass accumulation of deformation heat in the extrusion process is prevented, defects of profile breakage, periodic extrusion cracks or oxidation and the like due to local overheating are overcome, the extrusion speed of the profile is increased to 1 m / min-5 m / min, and the fast extrusion method is suitable for magnesium alloy profiles of extruders at various tonnages.

Description

technical field [0001] The invention relates to a nonferrous metal processing method, in particular to a rapid extrusion method for ZK60 magnesium alloy profiles. Background technique [0002] The density of magnesium alloy is less than 1.74g / cm3, which is currently the lightest metal structure material, and has the characteristics of high specific stiffness and specific strength, and good shock absorption. In recent years, due to the increasingly urgent demand for lightweight products, the amount of magnesium alloys has increased significantly. In recent years, magnesium alloys for automobiles have transitioned from non-stressed parts to stressed parts, which is of great significance for expanding the application of magnesium alloys in automobiles. The performance of the commercial magnesium alloy ZK60 itself determines that under conventional extrusion conditions, the excessive extrusion speed will cause the profile temperature to rise rapidly, and the profile surface is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C23/00B21C29/04B21C31/00
Inventor 刘运腾周吉学衣冠玉唐守秋詹成伟
Owner NEW MATERIAL INST OF SHANDONG ACADEMY OF SCI
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