Magnesium-based block metal glass composite material and preparation method thereof
A technology of metallic glass and composite material, applied in the field of magnesium-based endogenous bulk metallic glass composite material and its preparation, can solve problems such as lack of practicability, and achieve the effects of avoiding uneven structure, high strength and uniform performance
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[0017] The preparation method of a magnesium-based bulk metallic glass composite material of the present invention comprises the following steps:
[0018] The first step: prepare the high melting point component in the predetermined nominal composition alloy into a master alloy by the arc melting method;
[0019] The second step: put the broken intermediate alloy into the container together with Mg and Zn, and use the induction melting method to make the master alloy;
[0020] The third step: the master alloy is remelted by induction melting method, and the liquid master alloy is made into profiles by low-pressure copper mold blow casting method;
[0021] Step 4: After grinding and cleaning the profile, put it into a pre-treated crucible, and heat the bar to a fully melted or solid-liquid two-phase state by induction melting.
[0022] In the fourth step, the profiles are induced to melt under the protection of inert gas to prevent volatilization. The pulling rate of the seque...
Example Embodiment
[0032] Example 1
[0033] (1) Selection of raw materials
[0034] The purity of each metal component selected for preparing the master alloy in the present invention is as shown in the table: the formula of the composite material is Mg77Cu6Ni6Y6Zn5 (atomic percentage).
[0035] Table 1 The purity (%) of the selected metal component for preparing the master alloy ingot
[0036]
[0037] (2) Preparation of master alloy
[0038] First, under the condition of Ti inhalation and high-purity argon protection, a self-developed non-consumable arc melting furnace is used to melt the master alloy ingot. The specific procedures for the preparation of master alloy ingots are as follows:
[0039] After the surface of the metal raw materials Cu and Y with high melting point are mechanically polished to remove the oxide scale on the surface, the materials are prepared according to the selected / designed composition ratio; the prepared materials are put into the melting furnace according ...
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[0051] Example 2
[0052] Using the same preparation method as Example 1, the formula of the composite material is Mg74Cu7Ni7Y7Zn5, and the pulling rate of sequential solidification is 5 mm / s. The prepared composite material has a uniform structure and a compressive plasticity of 12.3%.
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