A low-cost room temperature high plastic deformation magnesium alloy material and its preparation process

A deformed magnesium alloy and preparation technology, applied in the field of metal materials, can solve the problems of high cost of primary and secondary plastic processing, poor thermoplastic processing performance, poor room temperature plasticity of rolled plates, etc., and achieve good room temperature formability and good thermoplasticity Processability, effect of low anisotropy

Active Publication Date: 2019-03-19
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a low-cost room temperature high plastic deformation magnesium alloy material and its preparation process, which solves the problem of poor thermoplastic processing performance of magnesium alloy rolling, extrusion, drawing, etc., and deformed materials after plastic processing, such as rolling A series of problems such as poor room temperature plasticity of the plate, high cost of primary and secondary plastic processing

Method used

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  • A low-cost room temperature high plastic deformation magnesium alloy material and its preparation process
  • A low-cost room temperature high plastic deformation magnesium alloy material and its preparation process
  • A low-cost room temperature high plastic deformation magnesium alloy material and its preparation process

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Experimental program
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Embodiment 1

[0040] 1) Using pure Mg ingots, pure Zn ingots, pure Mn ingots and Mg-30Ca master alloys as raw materials, the ingredients are prepared according to the weight percentage of the Mg-0.19Zn-0.34Ca-0.32Mn alloy composition (Table 1 No. 1);

[0041] 2) Using metal mold gravity casting, the Mg-Zn-Ca-(Mn) alloy is melted and poured into a 150mm×200mm×200mm ingot through conventional magnesium alloy melting; the second phase in the as-cast structure of the alloy is very small and the size is not large. big, such as figure 1 as shown in (a);

[0042] 3) After the ingot is homogenized at 430°C for 10 hours, the ingot is cut into billets of 150mm×100mm×20mm and milled, and the milled billet is rolled at 250°C for 2 hours; The temperature preheating temperature is 300°C; the rolling deformation speed is 15m / min, and the reduction of each pass is 30-60% (the macroscopic photo of the 40% reduction in a single pass of the plate is shown in figure 2 As shown in (a), without any cracks, it...

Embodiment 2

[0046] 1) Using pure Mg ingot, pure Zn ingot and pure Ca as raw materials, carry out batching according to the weight percentage of Mg-0.37Zn-0.13Ca alloy composition (Table 1 No. 2);

[0047] 2) Metal mold gravity casting is adopted, and the Mg-Zn-Ca alloy is smelted and poured into a 150mm×200mm×200mm ingot through conventional magnesium alloy melting; the second phase in the as-cast structure of the alloy is very small and the size is not large;

[0048] 3) After the ingot is homogenized at 420°C for 15 hours, the ingot is cut into billets of 150mm×100mm×20mm and milled, and the milled billet is rolled at 400°C for 2 hours; The temperature is room temperature; the rolling deformation speed is 15m / min, and the reduction in each pass is 30-60% (the macroscopic photo of the 40% reduction in a single pass of the plate is shown in figure 2 As shown in (c), the depth of cracks on the edge of the plate does not exceed 10mm, and there are no cracks on the surface, which has good r...

Embodiment 3

[0052] 1) Using pure Mg ingot, pure Zn ingot and Mg-30Ca master alloy as raw materials, carry out batching according to the weight percentage of Mg-0.73Zn-0.12Ca alloy composition (Table 1 No. 3);

[0053] 2) Using metal mold gravity casting, the Mg-Zn-Ca alloy is melted and poured into a 150mm×200mm×200mm ingot through conventional magnesium alloy melting; the second phase in the as-cast structure of the alloy is very small and the size is not large, such as figure 1 as shown in (b);

[0054] 3) The ingot is not subjected to homogenization heat treatment, and the ingot is directly cut into a 150mm×100mm×20mm billet and milled, and the milled billet is kept at 350°C for rolling; the temperature of the roll is 250°C; the rolling deformation speed 15m / min, the reduction of each pass is 20-60%, and after each rolling pass, return to the furnace and keep warm for 5-30 minutes to continue rolling until the thickness of the plate is 2mm, the total reduction is 90%, and the depth of ...

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Abstract

The invention discloses a low-cost magnesium alloy with the high room-temperature plastic deformation and a preparation process thereof, and belongs to the technical field of metal materials. The magnesium alloy comprises, by weight, 0.1%-0.9% of zinc, 0.1%-0.4% of calcium, 0-0.05% of manganese and the balance magnesium. The magnesium alloy does not contain rare earth elements or the Zr element and is low in alloy cost, an ingot of the magnesium alloy has good thermoplastic machining performance, large-rolling-reduction rolling with the rolling reduction being 80% at most in one pass can be achieved during hot rolling, and cracks in the surface are avoided. The ingot is subjected to thermoplastic machining and then annealing, the obtained magnesium alloy has a weak non-basal texture, the maximum density value of the magnesium alloy is not greater than 5, and the room-temperature elongation of the magnesium alloy is high and can reach 25%-40%.

Description

technical field [0001] The invention relates to the technical field of metal materials, in particular to a low-cost, room-temperature, high-plastic-deformation magnesium alloy material and a preparation process thereof. Background technique [0002] Magnesium alloy materials have the characteristics of low density, and are increasingly valued by transportation, communication and 3C electronic products. The thermoplastic processing performance of existing industrial magnesium alloy ingots such as AZ31 is poor, and a strong basal texture is formed after plastic processing, and its room temperature plasticity is low (generally 15-20%) and anisotropy is large, resulting in its room temperature and low temperature. The forming ability of the secondary plastic working under the conditions is insufficient, so the secondary plastic forming usually needs to be carried out at high temperature or medium temperature, which leads to high production and application costs of magnesium allo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/00C22C23/04C22F1/06
Inventor 陈荣石罗骏闫宏柯伟
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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