Magnesium alloy sheet with low Gd content and high ductility and malleability, and hot rolling technology thereof

A magnesium alloy and ductility technology, which is applied to high ductility magnesium alloy sheet and its hot rolling process, low Gd content field, and can solve the problems of strong basal texture, low strain hardening index and large anisotropy of the sheet , to achieve the effect of high strain hardening rate, low anisotropy, and improved productivity

Active Publication Date: 2014-03-26
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] In view of the disadvantages of current commercial magnesium alloys, such as AZ31 alloy, poor rolling performance, strong plate basal texture, poor room temperature plasticity, large anisotropy, and low strain hardening index, and the high rare earth content in some alloys leads to excessive alloy cost High problem, the present invention provides a new type of magnesium alloy plate with low Gd content, high ductility, good room temperature plasticity and formability and its hot rolling process. Texture weakening effect in the manufacturing process, establish the minimum effective content of Gd element texture weakening, reduce alloy cost

Method used

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  • Magnesium alloy sheet with low Gd content and high ductility and malleability, and hot rolling technology thereof
  • Magnesium alloy sheet with low Gd content and high ductility and malleability, and hot rolling technology thereof
  • Magnesium alloy sheet with low Gd content and high ductility and malleability, and hot rolling technology thereof

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Experimental program
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Effect test

Embodiment 1

[0035] 1) Gravity casting is adopted in metal molds, and cast into ingots of 150mm×200mm×200mm through conventional magnesium alloy smelting and casting. The weight percentage of the alloy composition is Zn: 2.0%, Gd: 0.2%, Mn: 0.8, and the magnesium content is the balance balance (Table 1 No. 1);

[0036] 2) After the ingot is homogenized at 450°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 is 300°C; the reduction in the first pass is 35%, and the reduction in each subsequent pass is 35-45%. After each rolling pass, return to the furnace and keep warm for 5-10 minutes to continue rolling until the thickness of the plate is 2mm. , the total reduction is 85%, and there are no cracks on the edge and surface of the plate, see figure 1 (a), dynamic recrystallization occurred during rolling, the plate has a fine grain size, see figure 2 (a);

[0037] 3) After rolling, the plate...

Embodiment 2

[0040] 1) Metal mold gravity casting is adopted, and Mg-Zn-Gd is smelted and poured into a 150mm×200mm×200mm ingot through conventional magnesium alloy melting. The alloy composition weight percentage is Zn: 1.8%, Gd: 0.4%, and the magnesium content is more than Quantity (Table 1 No. 2);

[0041] 2) After the ingot is homogenized at 420°C for 10 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 reduction in the first pass is 35%, and the reduction in each subsequent pass is 45%. After each rolling two passes, return to the furnace and keep warm for 5 to 10 minutes to continue rolling until the thickness of the plate is 3.2mm , the total reduction is 84%, and there are no cracks on the edge and surface of the plate, see figure 1 (b), dynamic recrystallization occurred during the rolling process, the plate has a fine grain size, see figure 2 (b);

[0042] 3) Afte...

Embodiment 3

[0045] 1) Metal mold gravity casting is adopted, and Mg-Zn-Gd is melted and poured into a 150mm×200mm×200mm ingot through conventional magnesium alloy melting. The weight percentage of the alloy composition is Zn: 1.9%, Gd: 0.6%, and the magnesium content is more than balance Quantity (No. 3 in Table 1);

[0046] 2) Cut the ingot into billets of 150mm×100mm×20mm and mill the face. Without homogenization heat treatment, the billet after milling is directly kept at 380°C for rolling; the temperature of the roll is 250°C; The reduction is 35%, and then the reduction of each pass is 35-45%. After each rolling two passes, return to the furnace and heat for 5-10 minutes to continue rolling until the thickness of the plate is 3mm, and the total reduction is 85%. There are no cracks on the edge and surface, and the sheet shows a deformed structure without complete recrystallization, see figure 2 (c);

[0047] 3) After rolling, the plate was annealed at 350°C for 1 hour, and obvious...

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Abstract

The invention discloses a magnesium alloy sheet with low Gd content and high ductility and malleability, and a hot rolling technology thereof, belonging to the technical field of metal materials. The magnesium alloy sheet comprises chemical compositions in percentage by weight: 0.9-2.1% of zinc, 0.2-0.8% of rare earth Gd, 0-0.9% of manganese, and the balance of magnesium. The rare earth Gd element is added in the magnesium alloy sheet, so that the cost of the alloy can be lowered, the magnesium alloy has excellent rolling property, and continuous multi-pass large-deformation rolling can be realized; the rolled sheet can be ensured to have non-basal plane texture and high room-temperature elongation, the room-temperature elongation can achieve 35-50%, wherein the elongation delta along the rolling direction is more than or equal to 35%, and the elongation in horizontal direction is more than or equal to 45%.

Description

technical field [0001] The invention relates to the technical field of metal materials, in particular to a magnesium alloy plate with low Gd content and high ductility and a hot rolling process thereof. Background technique [0002] Magnesium alloy has the advantages of small specific gravity, high specific strength, high damping, high thermal conductivity, good shock absorption, and easy recycling, and is more and more favored by the market. At present, die-casting magnesium alloys have been widely used in industrial fields such as automobiles and 3C electronic product casings. However, the subsequent surface treatment process of die-casting magnesium alloys is cumbersome and complex, and is easy to pollute the environment. Therefore, the industry hopes to adopt secondary processing methods such as stamping and forging with high production efficiency to directly form magnesium alloy sheets into housings for automobiles and 3C electronic products. . [0003] However, due t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/04C22F1/06
CPCC22C23/04C22C23/00C22F1/06
Inventor 陈荣石闫宏韩恩厚柯伟
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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