A kind of magnesium alloy plate with low rare earth content and high fatigue performance and preparation method thereof
A fatigue performance, magnesium alloy technology, applied in the field of rare earth magnesium alloys, can solve the problems of easy formation of coarse grains, poor plastic deformation ability, etc., to increase the sliding tendency of the base surface, improve the fatigue performance, and significantly improve the strength Effect
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Embodiment 1
[0043] This embodiment provides a low rare earth magnesium alloy and a preparation method thereof. The preparation method of the low rare earth magnesium alloy comprises the following steps:
[0044] S1: Put pure Mg ingot and Mg-30wt.%Gd, Mg-25wt.%Y, Mg-30wt.%Nd, Mg-30wt.%Zr master alloy into the melting furnace, preheat the master alloy before melting to remove Moisture in the raw material, grinding to remove the scale in the raw material. Melting and casting low-rare-earth magnesium alloy flat ingot with alloy composition of Mg-5Gd-2Y-1.0Nd-0.5Zr, the melting process is protected by argon, and the size of the flat ingot is 500mm*300mm*50mm;
[0045] S2: Machining the rare earth magnesium alloy flat ingot obtained by smelting and casting to remove surface scale and inclusions, the size of the flat ingot after machining is 480mm*280mm*45mm;
[0046] S3: placing the machined rare earth magnesium alloy flat ingot in an argon-protected holding furnace for uniform heat treatment...
Embodiment 2
[0060] This embodiment provides a low rare earth magnesium alloy and a preparation method thereof. The preparation method of the low rare earth magnesium alloy comprises the following steps:
[0061] S1: Put pure Mg ingot and Mg-30wt.%Gd, Mg-25wt.%Y, Mg-30wt.%Nd, Mg-30wt.%Zr master alloy into the melting furnace, preheat the master alloy before melting to remove Moisture in the raw material, grinding to remove the scale in the raw material. Melting and casting low-rare-earth magnesium alloy flat ingot with alloy composition of Mg-6Gd-2Y-1.0Nd-0.5Zr, the melting process is protected by argon gas, and the size of the flat ingot is 500mm*300mm*50mm;
[0062] S2: Machining the rare earth magnesium alloy flat ingot obtained by smelting and casting to remove surface scale and inclusions, the size of the flat ingot after machining is 480mm*280mm*45mm;
[0063] S3: placing the machined rare earth magnesium alloy flat ingot in an argon-protected holding furnace for uniform heat treat...
Embodiment 3
[0078] This embodiment provides a low rare earth magnesium alloy and a preparation method thereof. The preparation method of the low rare earth magnesium alloy comprises the following steps:
[0079] S1: Put pure Mg ingot and Mg-30wt.%Gd, Mg-25wt.%Y, Mg-30wt.%Nd, Mg-30wt.%Zr master alloy into the melting furnace, preheat the master alloy before melting to remove Moisture in the raw material, grinding to remove the scale in the raw material. Melting and casting low-rare-earth magnesium alloy flat ingot with alloy composition of Mg-6.6Gd-3.2Y-1.0Nd-0.5Zr. The melting process is protected by argon gas. The size of the flat ingot is 500mm*300mm*50mm;
[0080] S2: Machining the rare earth magnesium alloy flat ingot obtained by smelting and casting to remove surface scale and inclusions, the size of the flat ingot after machining is 480mm*280mm*45mm;
[0081] S3: placing the machined rare earth magnesium alloy flat ingot in an argon-protected holding furnace for uniform heat treat...
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