High-plasticity dissolvable magnesium alloy as well as preparation method and application thereof
A technology of magnesium alloy with large plasticity, which is applied in earthwork drilling, wellbore/well components, sealing/package, etc., and can solve the problems of poor plasticity of soluble magnesium alloys, achieve low component content, reduce costs, reduce The effect of cost of use
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Embodiment 1
[0021] This embodiment provides a large plastic dissolvable magnesium alloy, the ratio by weight percentage is: Zn: 1%, Gd: 0.5%, Y: 0.3%, Al: 0.1%, Cu: 0.1%, and the balance is Mg .
[0022] Provide a kind of preparation method of above-mentioned soluble magnesium alloy, concrete steps are as follows:
[0023] (1) Add various raw materials into the melting furnace in proportion and heat at 720°C. After all the metals are melted, pass through the argon gas to refine the alloy solution; let it stand for 35 minutes, and lower the temperature of the heating furnace to 700°C. The melt is cast into molds to produce ingots.
[0024] (2) The alloy ingot is machined to cut off the surface scale, the clean ingot is heated to 400° C., and the ingot is processed into a bar under the conditions of an extrusion speed of 4 mm / s and an extrusion ratio of 20.
[0025] (3) Heating the bar at 180°C for 18 hours to obtain a large plastic soluble magnesium alloy.
[0026] In this embodiment, t...
Embodiment 2
[0028] This embodiment provides a large plastic dissolvable magnesium alloy, and the ratio by weight percentage is: Zn: 2%, Gd: 0.8%, Al: 0.2%, Cu: 0.2%, and the balance is Mg.
[0029] A method for preparing the above-mentioned soluble magnesium alloy is provided, and the specific steps are the same as those in Example 1.
[0030] The yield strength of the magnesium alloy obtained in this embodiment is 170MPa, and the elongation in the radial direction and axial direction is respectively 29% and 28% at room temperature; at 90°C and under the condition of 10000ppm chloride ion concentration in the aqueous medium, the alloy dissolution rate is 42mg / cm 2 h. The soluble magnesium alloy can be applied to isolation tools or parts that require greater plasticity in oil and gas field fracturing reconstruction construction.
Embodiment 3
[0032] This embodiment provides a large plastic dissolvable magnesium alloy, and the ratio by weight percentage is: Zn: 2.5%, Y: 1%, Al: 0.3%, Cu: 0.3%, and the balance is Mg.
[0033] A method for preparing the above-mentioned soluble magnesium alloy is provided, and the specific steps are the same as those in Example 1.
[0034] The yield strength of the alloy obtained in this embodiment is 178MPa, and the elongation in the radial direction and the axial direction is 28% and 26% respectively; at 90°C and under the conditions of 10000ppm chloride ion concentration in the water medium, the alloy dissolution rate is 50mg / cm 2 h. The soluble magnesium alloy can be applied to isolation tools or parts that require greater plasticity in oil and gas field fracturing reconstruction construction.
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