Producing method of hot-rolled alloy plate for automobile body

A technology for automobile bodies and magnesium alloys is applied in the field of preparation of hot-rolled magnesium alloy sheets for automobile bodies, which can solve problems such as differences in repair processes, and achieve the effects of reducing production costs, improving performance, and simplifying processes

CN104550231AActive Publication Date: 2015-04-29山西银光华盛镁业股份有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2015-04-29

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Abstract

The invention relates to a magnesium alloy plate manufacturing technology. Based on existing mature conventional magnesium alloy which is good in comprehensive performance but cannot completely meet the plate requirement of an automobile body, a micron quasi-crystal intermediate alloy online mixed melting technology, a magnesium alloy plate cast rolling technology and a dynamic recrystallization hot rolling technology are adopted to modify the magnesium alloy and enable the performance of the magnesium alloy to be improved. By means of the producing method, the production cost can be remarkably reduced, the performance of the plate can be improved, and index can be closer to the requirement for sheet metal parts in the automobile industry.
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Description

technical field

[0001] The invention relates to the field of preparation of magnesium alloy plates, in particular to a preparation method of hot-rolled magnesium alloy plates for automobile bodies. Background technique

[0002] Weight reduction, energy saving, environmental protection, safety and comfort are the direction of the automobile industry. Among aluminum alloys, magnesium alloys, and carbon fiber-reinforced tree composite materials, magnesium alloys are the lightest, have excellent shock and noise reduction properties, and are most suitable for automotive materials in terms of impact resistance. The outstanding advantages of China's magnesium industry provide favorable conditions for the development of magnesium alloys into new automotive materials.

[0003] Ordinary car body is a frameless load-bearing body. Almost all car bodies are made by stamping. The shell composed of thin plate stamping parts, welded construction and facility covering parts is welded into...

Examples

Embodiment 1

[0027] A preparation method for a hot-rolled magnesium alloy plate (dispersed quasicrystalline phase strengthened MB8 magnesium alloy strip) for automobile body, comprising the following steps:

[0028] (1) When MB8 is used as the mother magnesium alloy, when the casting and rolling machine is working, such as figure 1 As shown, the treated clean magnesium alloy liquid 5 is sent to the liquid pool of the front box 7 of the magnesium alloy casting and rolling machine by the heat-sealed pipe 4, and the mother magnesium alloy liquid in the front box 7 is kept at 710°C. The feeder 17 evenly inserts the quasicrystalline master alloy thin strip 6 with a preheating temperature of 300°C into the mother magnesium alloy liquid at a ratio of 0.15% of the total metal mass and melts it, and the quasicrystal master alloy particles are evenly dispersed in the mother magnesium alloy In the liquid flow of the liquid, the molten magnesium alloy liquid 9 is formed. The composition of the quasic...

Embodiment 2

[0034] A method for preparing a hot-rolled magnesium alloy sheet (dispersed quasicrystalline phase strengthened AZ31B magnesium alloy sheet) for automobile body, comprising the following steps:

[0035] (1) When using AZ31D as the mother magnesium alloy, when the casting and rolling machine is working, such as figure 1 As shown, the treated clean mother magnesium alloy liquid 5 is sent to the liquid pool of the front box 7 of the magnesium alloy casting and rolling machine by the heat-sealed pipe 4, and the mother magnesium alloy liquid in the front box 7 is kept at 700°C. The feeder 17 evenly inserts the quasicrystalline master alloy thin strip 6 (composition of Mg-3%Zn-7%Y) with a preheating temperature of 250°C into the mother magnesium alloy solution at a ratio of 0.1% of the total metal mass and is After melting, the quasicrystalline master alloy particles are uniformly dispersed in the liquid flow of the mother magnesium alloy liquid to form a molten magnesium alloy liqu...

Embodiment 3

[0041] A method for preparing a hot-rolled magnesium alloy plate (dispersed quasicrystalline phase strengthened ZK60 magnesium alloy plate) for automobile body, comprising the following steps:

[0042] (1) When ZK60 is used as the mother magnesium alloy, when the casting and rolling machine is working, such as figure 1 As shown, the treated clean magnesium alloy liquid 5 is sent to the liquid pool of the front box 7 of the magnesium alloy casting and rolling machine by the heat-sealed pipe 4, and the mother magnesium alloy liquid in the front box 7 is kept at 705°C. The feeder 17 inserts the quasicrystalline master alloy thin strip 6 (composition of Mg-3%Zn-7%Y) with a preheating temperature of 350°C (composition of Mg-3%Zn-7%Y) into the mother magnesium alloy solution at a ratio of 0.2% of the total metal mass and is After melting, the quasicrystalline master alloy particles are uniformly dispersed in the liquid flow of the mother magnesium alloy liquid to form a molten magne...