Nickel-containing high-toughness controllably degradable magnesium alloy material, preparation method therefor and use thereof

Abstract

The present disclosure provides a nickel-containing high-toughness controllably degradable magnesium alloy material, a preparation method therefor and use thereof, and relates to the technical field of magnesium alloys. The magnesium alloy material comprises the following components in percentage by mass: 0.3 to 8.5% of Ni, 0.5 to 28% of RE, with the balance being Mg and unavoidable impurities. RE represents rare earth elements. By adding Ni and RE elements to introduce an Mg12RENi-type long-period phase, an Mg2Ni phase and an MgxREy phase, the magnesium alloy material provided by the present disclosure significantly improves mechanical properties of the alloy material, the tensile strength being up to 510 MPa. At the same time, the presence of the Mg12RENi-type long-period phase and Mg2Ni phase enables the alloy material to be controllably degradable, and enables the degradation rate to be adjustable between 360 and 2400 mm / a. Downhole fracturing tools manufactured by using the magnesium alloy alleviates the technical problem existing in current downhole tools and satisfy the requirements in the field of oil and gas exploitation.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]The present disclosure claims priority of Chinese patent application with the filing number 201811237934.1 filed on Oct. 23, 2018 with the Chinese Patent Office, and entitled “Nickel-containing High-toughness Controllably Degradable Magnesium Alloy Material, Preparation Method therefor and Use thereof”, the contents of which are incorporated herein by reference in entirety.TECHNICAL FIELD[0002]The present disclosure relates to the technical field of magnesium alloy, in particular to a nickel-containing, high-strength and high-toughness, controllably degradable magnesium alloy material, a preparation method therefor and use thereof.BACKGROUND ART[0003]With the rapid progress of economy, the petroleum problem in China has become one of the important problems with national concern. According to statistical data of the national statistical bureau, the net petroleum import in China is increasing continuously, and the dependency of petroleum in ...

AI Technical Summary

Benefits of technology

The invention provides a magnesium alloy material that has high strength and durability, but can be controlled to degrade over time. This helps to solve problems with existing packing tools made of steel, which can be difficult to drill and mill, and can cost a lot of money. The new material helps to shorten construction times and reduce costs.

Problems solved by technology

With the rapid progress of economy, the petroleum problem in China has become one of the important problems with national concern.

However, most of the existing common packing tools are made of steel, and have the defects of difficult drilling and milling, long-time consumption, difficult removal of powders and fragments after drilling and so on, which greatly increases the construction period and cost.