Rotary swaging preparation method for high-strength magnesium alloy wire
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A magnesium alloy, high-strength technology, used in metal processing equipment, manufacturing tools, forging/pressing/hammer devices, etc., can solve the problems of prone to hot cracking, low production efficiency, complex equipment, etc. The effect of high efficiency and simple equipment
Inactive Publication Date: 2010-06-23
BEIJING UNIV OF TECH
View PDF5 Cites 18 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
However, in order to prevent oxidation and combustion when casting magnesium alloy wire, it needs to be carried out under the condition of isolating oxygen (ZL200510043102.2), and the equipment is complicated; and the mechanical properties of cast magnesium alloy wire are much lower than those prepared by plastic deformation.
However, due to the close-packed hexagonal crystal structure of magnesium alloy, the plastic deformation ability at room temperature is poor, and thermal cracking is prone to occur in high temperature deformation, and the plastic deformation temperature range is narrow. The plastic forming process of magnesium alloy wire reported so far requires the design of a special mold insulation device to achieve deformation. On-line insulation of process billets (ZL20051004
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0009] Prepare the AZ61 magnesium alloy wire of diameter 2mm with swaging method as example below, the present invention is described in detail:
[0010] Step 1: The AZ61 magnesium alloy ingot purchased from the market is subjected to homogenization annealing in a conventional resistance heating furnace, the annealing temperature is 400-500°C, the heating rate is 10°C / min, the temperature is kept for 12 hours, and then cooled with the furnace.
[0011] Step 2: Processing the above-mentioned magnesium alloy ingot into a round bar with a diameter of 12 mm and a length of 300 mm by turning or extrusion, which is used as a blank for swaging to prepare magnesium alloy wire.
[0012] Step 3: keep the above-mentioned magnesium alloy billet in a conventional electric resistance heating furnace, the temperature is 160°C, and the holding time is 8 minutes.
[0013] Step 4: Install a swaging die with a diameter of 10.5mm on the head of the swaging machine, clamp the bar with a special cl...
Embodiment 2
[0022] Prepare the AZ91 magnesium alloy wire of diameter 2.8mm with swaging method as example below, the present invention is described in detail:
[0023] Step 1: The commercially available AZ91 magnesium alloy ingot is subjected to homogenization annealing in a conventional resistance heating furnace, the annealing temperature is 400-500°C, the heating rate is 10°C / min, the temperature is kept for 12 hours, and then cooled with the furnace.
[0024] Step 2: Processing the above-mentioned magnesium alloy ingot into a round bar with a diameter of 14 mm and a length of 300 mm by turning or extrusion, which is used as a blank for swaging to prepare magnesium alloy wire.
[0025] Step 3: keeping the above-mentioned magnesium alloy blank in a conventional resistance heating furnace at a temperature of 200° C. for 15 minutes.
[0026] Step 4: Install a φ13mm swaging die on the head of the swaging machine, clamp the bar with a special clamp for the swaging machine, take it out from ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
PUM
Login to view more
Abstract
The invention relates to a rotary swaging preparation method for a high-strength magnesium alloy wire, and belongs to the technical field of nonferrous metal plastic molding. The method comprises the following steps: carrying out heat preservation on magnesium alloy bars for 1 to 15 minutes at the temperature of between 120 DEG C and 200 DEG C, and clamping the bars by a special fixture of a rotary swaging machine to carry out rotary swaging; and after the rotary swaging is finished, replacing a rotary swaging mold with smaller bore diameter to repeat the steps until the magnesium alloy wire with required diameter is obtained, wherein in the process of rotary swaging, the feeding speed is controlled to between 6 and 10m/min; the pass compression ratio is controlled to between 18 and 45 percent; and the coning angle of the rotary swaging mold is controlled to between10 and 26 degrees. The method uses the three-dimensional compressive stress state and the pulse loading mode provided by the rotary swaging to realize plastic-deformation induced dispersion-strengthening phase precipitation and grain refinement so as to fulfill the aim of improving mechanical properties. The prepared magnesium alloy has excellent performance, the yield strength thereof is 25 to 53 percent higher than that of the magnesium alloy wire prepared through extrusion, and the tensile strength thereof is 18 to 23 percent higher than that of the magnesium alloy wire prepared through extrusion. The method has the advantages of no need of special on-line insulating device, simple equipment, high production efficiency and easy operation.
Description
technical field [0001] The invention belongs to the technical field of plastic forming of non-ferrous metals, and in particular relates to a swaging preparation method of high-strength magnesium alloy wire. Background technique [0002] High-performance magnesium alloy wire can be used as welding wire, fiber-reinforced components, spectacle frames, special spring parts, aviation parts, etc., and is an ideal raw material for semi-solid thixoforming, with excellent market application prospects. At present, magnesium alloy wire is mainly produced by casting or plastic deformation. However, in order to prevent oxidation and combustion, the casting of magnesium alloy wire needs to be carried out under the condition of isolating oxygen (ZL200510043102.2), and the equipment is complicated; and the mechanical properties of cast magnesium alloy wire are much lower than those prepared by plastic deformation. However, due to the close-packed hexagonal crystal structure of magnesium al...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to view more 
Login to view more