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Magnesium alloy compositely forming method

A composite forming and magnesium alloy technology, which is applied in the field of magnesium alloy forgings and magnesium alloy composite forming, can solve the problems of inability to form, fail to meet the requirements of mechanical properties, and limited degree of deformation.

Inactive Publication Date: 2008-07-09
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the conventional forging production of magnesium alloys mainly has the following shortcomings: magnesium alloys have only three slip systems at room temperature, and cannot be formed at room temperature; and the high-temperature slip systems have a high start-up temperature, and the production of magnesium alloy components by conventional forging methods requires multiple passes. Heating, Forging and Trimming
This method improves the process quality and mechanical properties of magnesium alloy products to a certain extent. However, due to the limited degree of deformation, it cannot meet the requirements of high-strength and toughness magnesium alloy load-bearing structural parts for large deformation processing to improve the mechanical properties of materials.

Method used

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  • Magnesium alloy compositely forming method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1: A magnesium alloy forging is produced by using a magnesium alloy composite forming method and using AZ61 as a raw material. Its process is carried out as follows:

[0024] 1) Magnesium alloy material selection: Magnesium alloy AZ61 is selected as the raw material;

[0025] 2) Preparation of magnesium alloy extrusion billet: AZ61 semi-continuous casting billet with a diameter of Φ100 mm suitable for extrusion equipment requirements was obtained by casting method;

[0026] 3) Preheating before extrusion: heat the cast slab to 380°C and keep the temperature for 80 minutes; at the same time, preheat the extrusion die to 350°C and keep it warm;

[0027] 4) Extrusion forming: put the billet into the extrusion die, and extrude it at a speed of 2.5m / min to form a preformed section with two-dimensional geometric characteristics of the forging (see Figure 2);

[0028] 5) Prepare molded blanks: cut the extruded profiles into 14 mm long molded blanks according to the d...

Embodiment 2

[0031] Example 2: A magnesium alloy forging is produced by using a magnesium alloy composite forming method and using AZ31 as a raw material. Its process is carried out as follows:

[0032] 1) Magnesium alloy material selection: Magnesium alloy AZ31 is selected as the raw material;

[0033] 2) Preparation of magnesium alloy extrusion billet: AZ31 semi-continuous casting billet with a diameter of Φ100mm suitable for extrusion equipment requirements was obtained by casting method;

[0034] 3) Preheating before extrusion: heat the cast slab to 425°C and keep the temperature for 120 minutes; at the same time, preheat the extrusion die to 316°C and keep it warm;

[0035] 4) Extrusion forming: put the billet into the extrusion die, and extrude it at a speed of 12m / min to form a preformed section with two-dimensional geometric characteristics of the forging (see Figure 2);

[0036] 5) Prepare molded blanks: cut the extruded profiles into 14 mm long molded blanks according to the de...

Embodiment 3

[0039] Example 3: A magnesium alloy forging was produced using a magnesium alloy composite forming method with AZ80 as the raw material. Its process is carried out as follows:

[0040] 1) Magnesium alloy material selection: Magnesium alloy AZ80 is selected as the raw material;

[0041] 2) Preparation of magnesium alloy extrusion billet: AZ80 semi-continuous casting billet with a diameter of Φ100 mm suitable for extrusion equipment requirements is obtained by casting method;

[0042] 3) Preheating before extrusion: heat the cast slab to 400°C and keep the temperature for 25 minutes; at the same time, preheat the extrusion die to 288°C and keep it warm;

[0043] 4) Extrusion forming: put the billet into the extrusion die, and extrude it at a speed of 7m / min to form a preformed section with the two-dimensional geometric characteristics of the forging (see Figure 2);

[0044] 5) Prepare molded blanks: cut the extruded profiles into 14 mm long molded blanks according to the desig...

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Abstract

A magnesium alloy compound forming method belongs to the processing field of magnesium alloy which is characterized in that the invention heats a cast acquired by a casting method for 350 to 425 DEG C and simultaneously heats an extruding die to 232 to 425 DEG C and then maintains temperature for 25 to 120mins; then extrudes a performing extruding proximate matter with a two-dimensional characteristic of the cast by an extruding speed of 1.2 to 12m / min; cutting a mould pressing blank material with a same volume as the cast, heats the mould pressing blank to 290to 400 degrees and maintains the temperature for 25 to 120mins after a die is heated to 232 to 400 degrees, finally carries through one-time mould pressing by a deformation speed of 2 to 200mm / s to acquire a final product. The magnesium alloy cast produced by the invention can meet not only meet the requirement for shape of the product, but also improve the comprehensive performance of the magnesium alloy cast and can simultaneously lead the comprehensive performance of the product to be more uniformly. The invention has the advantages of reliable technical quality, high efficiency, little energy consumption, high quality and high technical yield. The invention is suitable for batch productions on the structural component products with extruding and mould pressing characteristics.

Description

technical field [0001] The invention relates to a magnesium alloy composite forming method. In particular, it relates to a method for manufacturing a magnesium alloy forging with significantly improved performance by introducing plastic deformation; it belongs to the field of magnesium alloy processing. Background technique [0002] The current forming methods of magnesium alloy forgings at home and abroad are mainly limited to multiple die forging with simple geometric shape billets or extrusion billets. At present, the conventional forging production of magnesium alloys mainly has the following shortcomings: magnesium alloys have only three slip systems at room temperature, and cannot be formed at room temperature; and the high-temperature slip systems have a high start-up temperature, and the production of magnesium alloy components by conventional forging methods requires multiple passes. Heating, pressing and trimming. Therefore, there are problems such as lengthy for...

Claims

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Application Information

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IPC IPC(8): B23P13/02B21C23/02B21C23/01B21C31/00B21J5/00B21J1/06
Inventor 龙思远曹凤红廖惠敏
Owner CHONGQING UNIV
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