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Magnesium alloy clothes hanger and its production process

A production method and magnesium alloy technology, applied in luggage racks, bicycle accessories, transportation and packaging, etc., can solve problems affecting product quality, over-burning of weld grains, large deformation of base metal, etc., and achieve bright and beautiful colors, qualified High efficiency and good product quality

Inactive Publication Date: 2008-06-18
于克儒
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Experiments have found that welding process parameters have a great influence on the shape of the weld surface. If the current is too small, the base metal will not melt, and it is prone to incomplete fusion and incomplete penetration; if the current is too large, the base metal will be deformed and burn through easily. , the weld has defects such as grain overburning, pores, cracks, etc. Sometimes although a weld with a smooth surface can be formed, there are pores inside
Seriously affect the quality of products after welding
Therefore, there are great difficulties in producing non-motor vehicle hangers with magnesium alloys

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] The cut-off magnesium-aluminum series alloy bar with a weight percentage of 6% Al is subjected to surface peeling treatment, then placed in an electric heating furnace and heated to 400° C., and kept for 24 hours for homogenization annealing treatment. Take it out of the oven and air cool to room temperature, then put it into an electric heating furnace and heat it to 355°C±5°C, and keep it warm for 3 hours. When heating, use 4 sections to control the furnace temperature and force the gas to circulate. At the same time, the extrusion die is heated to 340°C±10°C, and the extrusion barrel is heated to 340°C±10°C. The above-mentioned heated magnesium alloy bar is put into an extruder and extruded into a clothes hanger profile at an extrusion speed of 3-4m / min. During the extrusion process, the temperature should not be too high to melt the magnesium rod and cause burning, or the temperature is too low to be extruded or the mold will be damaged. After extrusion, according...

Embodiment 2

[0053] The production weight percentage is the magnesium-aluminum series alloy clothes hanger of 3% Al, and production method, bending, flattening, welding process are the same as embodiment 1, only extruding process is that the bar heating temperature is 395 ℃ ± 5 ℃, heat preservation 3 hours . At the same time, the extrusion die is heated to 380°C±10°C, and the extrusion barrel is heated to 380°C±10°C. The extrusion speed is 6-7m / min. The composition of the welding wire is basically the same as that of the alloy to be welded, except that the impurity content is stricter than that of the alloy to be welded, among which Si≤0.05%, Fe≤0.003%, Cu≤0.001%, Ni≤0.001%, and the rest ≤0.01%.

[0054] The clothes hanger of this composition alloy can be subjected to stress relief annealing heat treatment, that is, the above clothes hanger is put into an aging furnace to be heated for stress relief annealing.

[0055] The tensile strength of the magnesium alloy hanger with this composit...

Embodiment 3

[0057] The production method, bending, flattening and welding process of the magnesium-aluminum series alloy hanger with 10% Al by weight are the same as those in Example 1. The extrusion process is that the heating temperature of the rod is 310°C±10°C and the temperature is kept for 2 hours. At the same time, the extrusion die is heated to 310°C±10°C, and the extrusion barrel is heated to 310°C±10°C. The extrusion speed is 2-3m / min. The composition of the welding wire is basically the same as that of the alloy to be welded, except that the impurity content is stricter than that of the alloy to be welded, among which Si≤0.05%, Fe≤0.003%, Cu≤0.001%, Ni≤0.001%, and the rest ≤0.01%.

[0058] The clothes hanger of this composition alloy can be subjected to T6 heat treatment, that is, first put the above clothes hanger into a heating furnace and heat it to 530°C, keep it warm for 4-12 hours, cool it in water, then heat it to 200-220°C, keep it warm for 12-16 hours, and air cool it...

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Abstract

The magnesium alloy clothes hanger has high mechanical performance, light weight and low cost, and the production process with high production efficiency and high product quality includes descaling magnesium alloy rod, heating in a furnace at 400 deg.c for 24 hr, air cooling to room temperature, re-heating in a furnace at 300-400 deg.c for 3 hr, extruding to form shapes, mechanical forming and welding to assembly, and annealing to eliminate stress or artificially ageing. Owing to the heat treatment, the magnesium alloy clothes hanger has well matched strength, plasticity and comprehensive performance, and may be used in various non-motored vehicle.

Description

technical field [0001] The invention relates to a non-motor vehicle part, in particular to a magnesium alloy material non-motor vehicle hanger and a method for producing the hanger by extrusion. Background technique [0002] At present, the possession of non-motor vehicles (such as bicycles, electric bicycles, tricycles, etc.) in China is very large. For bicycles, there are about 500 million bicycles in my country, and the number of people using bicycles as a means of transportation is about 600 million. But along with the improvement of people's quality of life and the transformation of life concepts, bicycles have become the best tool for sports and leisure activities while acting as a means of transportation. At present, 20 million people in the United States ride bicycles for fitness; in Europe, cycling "one-day tour" has also become one of the most fashionable fashion sports. [0003] In terms of selecting materials for bicycle hangers, bicycle manufacturers all over t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B62J7/00C22C23/02
Inventor 于克儒
Owner 于克儒
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