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

AI Technical Summary

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

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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Experimental program
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Example Embodiment

[0020] Example 1

[0021] figure 1 It is the mold core of the mechanical property sample of the patent of the present invention, which is composed of a cavity mold core embedded in the semi-solid injection molding machine and the mechanical property sample. The cavity mold core for the mechanical properties of the magnesium alloy is designed into four barbell-like mechanical properties sample sheets with thicknesses of 1, 1.5, 2 and 3mm respectively, which are respectively connected with the inlet runner and the four-way runner, and then pass through the slag bag type The cavity 20 splits and then merges, and finally communicates with the vacuum exhaust fin cavity 21. The mechanical properties of the sample mold core is composed of sprue sleeve 1, positioning ring 2, shunt cone 7, runner 19, female mold core 5, male mold core 6, cavity 18, thimble 8, and male mold evacuated 16. The master mold is evacuated into the 17th grade. The sprue sleeve 1, the positioning ring 2, the spl...

Example Embodiment

[0025] Example 2

[0026] In the method for preparing a sample for measuring the mechanical properties of magnesium alloy semi-solid injection molding provided by the present invention, a JLM220 magnesium alloy semi-solid injection molding machine from Japan JSW company is used to inject the semi-solid magnesium alloy liquid into the mold. 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: Acheson CP503, dilution ratio: 1:60.

[0029] The parameter setting of the molding machine: the heating temperature of the barrel is 600℃, 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 magnesium alloy liquid, no vacuum is applied.

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

Example Embodiment

[0033] Example 3

[0034] In the method for preparing a sample for measuring the mechanical properties of magnesium alloy semi-solid injection molding provided by the present invention, a Japanese JSWJLM220 magnesium alloy semi-solid injection molding machine is used to evacuate the cavity of the sample before injecting the magnesium alloy liquid. , And then inject the semi-solid magnesium alloy liquid into the mold. The operating parameters 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: Acheson CP503, dilution ratio: 1:60.

[0037] The parameter setting of the molding machine: the heating temperature of the barrel is 600℃, the first-stage injection speed is set to 55%, and the second-stage injection speed is set to 22%

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

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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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