Low-cost magnesium alloy with high room-temperature plastic deformation and preparation process thereof

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

Active Publication Date: 2016-11-23
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 magn

Method used

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  • Low-cost magnesium alloy with high room-temperature plastic deformation and preparation process thereof
  • Low-cost magnesium alloy with high room-temperature plastic deformation and preparation process thereof
  • Low-cost magnesium alloy with high room-temperature plastic deformation and preparation process thereof

Examples

Experimental program
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Effect test

Embodiment 1

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

[0041] 2) Using metal mold gravity casting, Mg-Zn-Ca-(Mn) alloy is cast into an ingot of 150mm×200mm×200mm by conventional magnesium alloy melting; the number of second phases in the as-cast structure of the alloy is very small and the size is not Big as figure 1 (a) shown;

[0042] 3) After the ingot is kept at 430℃ for 10 hours and homogenized, the ingot is cut into 150mm×100mm×20mm billets and milled, and the milled billets are heated at 250°C for 2 hours before rolling; The preheating temperature is 300℃; the rolling deformation speed is 15m / min, and the reduction of each pass is 30-60% (the macro photo of the single pass 40% reduction of the plate is as figure 2 As shown in (a), it has no cracks and has good rolling performance). After each pass, return to the fur...

Embodiment 2

[0046] 1) Using pure Mg ingots, pure Zn ingots and pure Ca as raw materials, the ingredients are mixed according to the weight percentage of Mg-0.37Zn-0.13Ca alloy composition (No. 2 in Table 1);

[0047] 2) Using metal mold gravity casting, Mg-Zn-Ca alloy is cast into an ingot of 150mm×200mm×200mm by 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 kept at 420°C for 15 hours for homogenization, the ingot is cut into 150mm×100mm×20mm billets and milled, and the milled billets are heated at 400°C for 2 hours before rolling; The temperature is room temperature; the rolling deformation speed is 15m / min, and the reduction of each pass is 30-60% (the macro photo of the single pass 40% reduction of the plate is shown in figure 2 As shown in (c), the crack depth on the edge of the plate does not exceed 10mm, and the surface has no cracks, and has good rolling performance). A...

Embodiment 3

[0052] 1) Take pure Mg ingots, pure Zn ingots and Mg-30Ca master alloy as raw materials, and mix according to the weight percentage of Mg-0.73Zn-0.12Ca alloy composition (No. 3 in Table 1);

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

[0054] 3) Without homogenization heat treatment, 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 roll temperature is 250°C; the rolling deformation speed It is 15m / min, the reduction of each pass is 20-60%. After each pass is rolled, it is returned to the furnace for 5-30 minutes to continue rolling until the thickness of the plate is 2mm, the total reduction is 90%, and the edge crack depth of the plate is not Over 10mm, no cracks on the sur...

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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 more and more attention is paid to transportation, communication and 3C electronic products. Existing industrial magnesium alloy ingots such as AZ31 have poor hot plastic processing performance, and form a strong base surface texture after plastic processing. Its room temperature plasticity is low (generally 15-20%), and its anisotropy is large, resulting in its room temperature and low temperature The secondary plastic forming ability is insufficient, so secondary plastic forming usually needs to be carried out at high or medium temperature, resulting in high production and application costs of magnesium alloy deformed materials, which is not conducive to industrial...

Claims

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Application Information

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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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