Powder for additive manufacturing and preparation method and application thereof

In order to solve the problems that an aluminum alloy part obtained through existing additive manufacturing is prone to having the hot crack defect, and the material formability and the mechanical property are affected, the powder for additive manufacturing is provided and comprises, by weight, 92-98 parts of aluminum alloy powder and 2-8 parts of nano Ni powder. Wherein the average particle size of the aluminum alloy powder is 1-100 microns, and the average particle size of the nano Ni powder is 10-800 nanometers. Meanwhile, the invention further discloses a preparation method and application of the powder for additive manufacturing. According to the powder for additive manufacturing, the laser input efficiency is improved, meanwhile, hot cracks of an aluminum alloy part obtained through additive manufacturing are effectively reduced, and the mechanical property of the aluminum alloy part is improved. 为克服现有增材制造得到的铝合金件容易出现热裂纹缺陷，影响材料成形性和力学性能的问题，本发明提供了一种增材制造用粉体，包括以下重量组分：铝合金粉末92～98份，纳米Ni粉末2～8份；其中，铝合金粉末的平均粒径为1～10