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Magnesium alloy heat treatment process with combined current treatment

A heat treatment method and current treatment technology, applied in the field of magnesium alloy heat treatment, can solve the problems of production efficiency impact, long heating time, etc., and achieve the effect of small equipment investment and energy saving

Inactive Publication Date: 2007-06-06
WUHAN UNIV OF TECH
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Problems solved by technology

If magnesium alloy is followed by artificial aging after solution treatment, although part of its plasticity will be reduced, its yield strength can be improved, but the long heating time is also a problem in this process.
When applying these processes in actual production, the production efficiency will inevitably be affected by these factors

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  • Magnesium alloy heat treatment process with combined current treatment

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Embodiment Construction

[0015] In order to better understand the present invention, the content of the present invention is further illustrated below in conjunction with the examples, but the content of the present invention is not limited to the following examples.

[0016] Take the heat treatment of magnesium alloy AZ91D as an example: the AZ91D alloy is prepared with a nickel-free steel crucible, and its alloy composition mass percentage is: Al (8.90); Zn (0.637); Mn (0.2085); Be (0.0010); Si (0.022) ; Fe (0.0024); Cu (0.0014); Ni (0.0008); Mg (the rest). Casting is carried out with ductile iron metal molds, and several round rods of φ10mm×120mm are produced. Because the cross-section of the round rod is consistent, the macroscopic consistency of the current density on the cross-section is guaranteed. The device when the method of the present invention is implemented is as shown in Figure 1, the two ends of the round rod adopt the good oxidation-resistant clamps of electrical conductivity to conn...

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Abstract

The present invention is magnesium alloy heat treatment process combined with current treatment. The magnesium alloy heat treatment process features its combination with current treatment in one of following four modes: 1. solution quenching with current applied in the current density of 2-20 A / sq cm and no ageing after solution quenching; 2. solution quenching with current applied in the current density of 2-20 A / sq cm and ageing after solution quenching; 3. solution quenching and ageing after solution quenching with current applied in the current density of 2-100 A / sq cm; and 4. solution quenching with current applied in the current density of 2-20 A / sq cm and ageing after solution quenching with current applied in the current density of 2-100 A / sq cm. The magnesium alloy heat treatment process has shortened period, raised production efficiency, reduced oxidation and raised magnesium alloy performance.

Description

technical field [0001] The invention relates to a magnesium alloy heat treatment method, which belongs to the field of magnesium alloy heat treatment. Background technique [0002] Traditional solid solution strengthening and aging treatment methods can improve the properties of cast alloys. If the magnesium alloy is not aged after solution quenching, its tensile strength and elongation can be improved at the same time. However, due to the slow atomic diffusion of alloying elements in magnesium alloys, a longer heating time is required to ensure that the strengthening phase is fully dissolved. If the magnesium alloy is subjected to artificial aging after solution treatment, although part of its plasticity will be reduced, its yield strength can be improved, but the long heating time is also a problem in this process. When applying these processes in actual production, production efficiency will inevitably be affected by these factors. Contents of the invention [0003] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F3/00C22F1/06
Inventor 华林李继高金亚旭
Owner WUHAN UNIV OF TECH