High-strength and high-toughness wrought magnesium alloy and preparation method
A technology for deforming magnesium alloys and magnesium alloys, which is applied in the field of metal materials and metal material processing, can solve the problems of low plasticity of alloys, and achieve the effects of improving strength and toughness, excellent room temperature mechanical properties, and good flame retardant effect
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Embodiment 1
[0039] Embodiment 1: Select the Mg-5.2Bi-2.8Nd-0.3Zn (wt%) alloy composition ratio to form a magnesium alloy, and the preparation method includes the following steps.
[0040] 1) Ingredients: Pure Mg (99.8 wt%) ingot, pure Bi (99 wt%) block, pure Zn block (99 wt%) and Mg-30Nd master alloy are used as raw materials, after surface pretreatment (such as removing dirt, scale etc., the following examples are the same), and the weight percentage of the above-mentioned magnesium alloy is used as the target composition for batching.
[0041] 2) Melting: Clean and preheat the crucible, put the magnesium ingot preheated to 200°C into the crucible of the melting furnace, set the furnace temperature to 720°C, heat slowly, and the heating rate is 20~40°C / min. After it melts, add the pure Bi block preheated to 50~70°C, the pure Zn block and the Mg-30Nd master alloy preheated to 200~250°C into the molten magnesium in sequence; keep warm for 10 minutes, then stir for 5 Minutes, and then kept...
Embodiment 2
[0047] Embodiment 2: Select the Mg-6.0Bi-3.0Nd-0.5Zn (wt%) alloy composition ratio to form a magnesium alloy, and the preparation method includes the following steps.
[0048] 1) Ingredients: Pure Mg (99.8 wt%) ingot, pure Bi (99 wt%) block, pure Zn block (99 wt%) and Mg-30Nd master alloy are used as raw materials, after surface pretreatment (such as removing dirt, scale etc., the following examples are the same), and the weight percentage of the above-mentioned magnesium alloy is used as the target composition for batching.
[0049] 2) Melting: Clean and preheat the crucible, put the magnesium ingot preheated to 200°C into the crucible of the melting furnace, set the furnace temperature to 720°C, heat slowly, and the heating rate is 20~40°C / min. After it melts, add the pure Bi block preheated to 50~70°C, the pure Zn block and the Mg-30Nd master alloy preheated to 200~250°C into the molten magnesium in sequence; keep warm for 10 minutes, then stir for 5 Minutes, and then kept...
Embodiment 3
[0055] Embodiment 3: Select the Mg-4.5Bi-2.5Nd-0.3Zn (wt%) alloy composition ratio to form a magnesium alloy, and the preparation method includes the following steps.
[0056] 1) Ingredients: Pure Mg (99.8 wt%) ingot, pure Bi (99 wt%) block, pure Zn block (99 wt%) and Mg-30Nd master alloy are used as raw materials, after surface pretreatment (such as removing dirt, Scale etc., following embodiment is the same), carries out batching according to the weight percent of above-mentioned magnesium alloy as target composition;
[0057] 2) Melting: Clean and preheat the crucible, put the magnesium ingot preheated to 200°C into the crucible of the melting furnace, set the furnace temperature to 720°C, heat slowly, and the heating rate is 20~40°C / min. After it melts, add the pure Bi block preheated to 50~70°C, the pure Zn block and the Mg-30Nd master alloy preheated to 200~250°C into the molten magnesium in sequence; keep warm for 10 minutes, then stir for 5 Minutes, and then kept at 7...
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Abstract
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