High-chromium nickel-based high-temperature alloy and preparation method and application thereof

Abstract

The invention relates to the field of advanced manufacturing and high-temperature alloys, in particular to a high-chromium nickel-based high-temperature alloy and a preparation method and an application thereof. The high-chromium nickel-based high-temperature alloy is prepared from the following components in percent by mass: 30-35% of Cr, 1-2% of Ti, 1-2% of Al, 2-3% of Ta, 1-2% of Nb, 2.5-3.5% of Mo, 4-5% of W, 0.2-0.5% of Fe, 0.005-0.03% of C, 0.003-0.01% of B, 0.003-0.01% of Y and the balance Ni. According to the high-chromium nickel-based high-temperature alloy prepared by a laser additive manufacturing method, thermal stress is reduced to reduce deformation and cracks of a workpiece in the laser additive manufacturing process by optimizing parameters of the laser additive manufacturing process and carrying out cooling by way of liquid argon synchronous chilling in the laser additive manufacturing process, and net shaping of the high performance high-chromium nickel-based high-temperature alloy is achieved, so that the high-chromium nickel-based high-temperature alloy which is excellent in comprehensive performance is obtained. The high-chromium nickel-based high-temperature alloy is suitable for the fields of aerospace, petrochemical engineering, nuclear power industry and the like.

Description

technical field [0001] The invention relates to the fields of advanced manufacturing and high-temperature alloys, in particular to a high-chromium-nickel-based high-temperature alloy and its preparation method and application. Background technique [0002] Nickel-based superalloys are widely used in aerospace, petrochemical, and nuclear power industries due to their excellent comprehensive properties, especially in the manufacture of key hot-end parts of aero-engines and gas turbines (currently the main preparation processes are casting and plastic forming manufacturing Wait). However, superalloys contain a large number of refractory metal alloy elements, which are difficult to process and complex in manufacturing technology. It is even more difficult to manufacture parts with complex shapes, which seriously restricts the application of nickel-based superalloys in industry and national defense. [0003] The key heat-bearing components of aero-engines (such as combustion cha...

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Problems solved by technology

[0006] CN109967742A discloses a nickel-based superalloy and its preparation method, and specifically discloses a method for laser additive manufacturing of GH4169 alloys, which can improve the tensile mechanical properties of GH4169 alloys; however, the laser additive manufacturing process is mainly due to heat Through the matrix to dissipate heat outward, as the number of layers increases, the heat gradually accumulates, resulting in the gradual accumulation of thermal stress and the increase of grain size. Metal components are prone to deformation and cracking due to thermal stress, which in turn affects the shape and performance of metal components.

[0007] CN209077788U discloses a synchronous water cooling system suitable for laser additive manufacturing, which is used for synchronous cooling of laser additive manufacturing; but what the above water cooling system uses is circulating water for cooling, and a large amount of Limited reduction of heat build-up

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