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Preparation method of sample for measuring semisolid injection forming mechanical property of magnesium alloy

A technology of injection molding and sample preparation, which is applied in the direction of measuring devices, scientific instruments, sampling devices, etc., can solve the problems of data fluctuation, poor accuracy and reliability, etc., and achieve the effect of fine and uniform grain structure

Inactive Publication Date: 2010-09-22
SHANGHAI ZIYAN ALLOY APPL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] According to the requirements of magnesium alloy semi-solid injection molding products to accurately reflect and evaluate its mechanical properties, to overcome the shortcomings and deficiencies of current data fluctuations, poor accuracy and reliability by intercepting mechanical performance samples from products, the purpose of the present invention is to Propose a sample preparation method that can better reflect the mechanical properties of magnesium alloy semi-solid injection molded products under special mold and fixed process conditions

Method used

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  • Preparation method of sample for measuring semisolid injection forming mechanical property of magnesium alloy
  • Preparation method of sample for measuring semisolid injection forming mechanical property of magnesium alloy
  • Preparation method of sample for measuring semisolid injection forming mechanical property of magnesium alloy

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Embodiment 1

[0021] figure 1It is the mold core of the mechanical performance sample of the patent of the present invention, which is composed of a cavity mold core embedded in a semi-solid injection molding machine and a mechanical performance sample. The cavity mold core of the magnesium alloy mechanical properties is designed as four barbell-shaped mechanical property sample slices with thicknesses of 1, 1.5, 2 and 3 mm respectively, which are respectively connected with the inlet flow channel and the four-point flow channel, and then passed through the slag-shaped Cavity 20, diverges and rejoins, and finally communicates with the cavity 21 of the vacuum exhaust sheet. The mechanical performance sample mold core is composed of sprue sleeve 1, positioning ring 2, splitter cone 7, runner 19, female mold core 5, male mold core 6, cavity 18, ejector pin 8, male mold vacuum inlet 16, The master mold is vacuum-pumped into 17 and other components. Sprue sleeve 1, positioning ring 2, diverter...

Embodiment 2

[0026] In the preparation method for measuring the mechanical properties of magnesium alloy semi-solid injection molding provided by the present invention, the semi-solid magnesium alloy liquid is injected into the mold by using the JLM220 type magnesium alloy semi-solid injection molding machine of JSW Company of Japan. The process parameters during operation are as follows:

[0027] The set temperature of the mold heater: 200°C for the movable mold and 200°C for the fixed mold.

[0028] Release agent: use Acheson CP503, dilution ratio: 1:60.

[0029] Parameter setting of the molding machine: the heating temperature of the barrel is 600°C, the injection speed of the first stage is set to 55%, and the injection speed of the second stage is set to 22%. When injecting the magnesium alloy liquid, do not draw a vacuum.

[0030] Magnesium alloy crumbs: AZ91D crumbs (diameter about ф1-2mm, length about 3-5mm) produced for Nanjing Huahong New Material Co., Ltd. were injected into t...

Embodiment 3

[0034] In the preparation method for measuring the mechanical properties of magnesium alloy semi-solid injection molding provided by the present invention, the Japanese JSWJLM220 type magnesium alloy semi-solid injection molding machine is used to evacuate the inner mold cavity of the sample before injecting the magnesium alloy liquid. , and then inject the semi-solid magnesium alloy liquid into the mould. The process parameters of the operation are as follows:

[0035] The set temperature of the mold heater: 200°C for the movable mold and 200°C for the fixed mold.

[0036] Release agent: use Acheson CP503, dilution ratio: 1:60.

[0037] Molding machine parameter setting: the heating temperature of the barrel is 600°C, the injection speed of the first stage is set to 55%, and the injection speed of the second stage is set to 22%.

[0038] Magnesium alloy crumbs: AZ91D crumbs (diameter about ф1-2mm, length about 3-5mm) produced by Nanjing Huahong New Material Co., Ltd., three...

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Abstract

The invention relates to a preparation method of a sample for measuring the semisolid injection forming mechanical property of a magnesium alloy. The preparation method is characterized by comprising the following steps of: (1) solidifying a mould of a mechanical property sample die cavity with a mould frame of a magnesium alloy semisolid injection forming machine by inlaying and bolting manners to be combined into a mechanical property sample mould; (2) heating magnesium alloy crumbs to ensure that slurry is positioned in a semisolid and semi-molten state; (3) evacuating the solidified combination, then injecting the semisolid and semi-molten magnesium alloy slurry in the step 2 into a mould, controlling the heating temperature of a fixed material tube, the heating temperature of the mould and the injection speed, demoulding the solidified and formed magnesium alloy by selecting a mould release agent and interrupting samples with different thicknesses for measuring. By using the method, the mechanical property fluctuation measured by different samples with different thicknesses is small, so that the mechanical property reached by a magnesium alloy material in the semisolid injection forming can be better reflected and estimated.

Description

technical field [0001] The invention relates to a sample preparation method for measuring the mechanical properties of magnesium alloy semi-solid injection molding, and belongs to the technical field of semi-solid injection molding testing. Background technique [0002] Compared with traditional die-casting, the semi-solid injection molding of magnesium alloy does not need metal melting and pouring processes, the production process is clean, safe and energy-saving, the loss of raw materials is greatly reduced, and the molded products have high dimensional accuracy, dense interior and few defects. It is suitable for the molding of thin-walled parts, so it has a series of characteristics and advantages. In 1991, DOW Corporation of the United States applied for a patent for this method, and jointly established Thixmat Corporation with several companies. In April of that year, it launched the world's first commercial semi-solid injection molding machine, which opened the semi-so...

Claims

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Application Information

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IPC IPC(8): G01N1/04G01N3/00
Inventor 徐侃沈庆卫肖利王硕冯文武
Owner SHANGHAI ZIYAN ALLOY APPL TECH
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