The invention provides bulk
powder for 3D printing, a preparation method thereof and a printing method. The bulk
powder for 3D printing is bulk particles, and the bulk particles are prepared from thefollowing components in percentage by weight: 90-98% of a
powder body and 2-10% of a binder, wherein
particle size distribution D90 of the powder body is 0.3-35 [mu]m. According to the bulk powder for3D printing, the
solid content of the powder is significantly increased, the
relative density after
sintering can reach 97% or above,
particle size distribution D90 of the bulk particles is 50-200 [mu]m,
particle size distribution of the adopted powder body is small, the product
sintering density is advantageously increased, mechanical properties are advantageously enhanced, the prepared bulk powder for 3D printing is high in
sintering density and small in using amount of the binder, and the preparation process is simplified. According to the 3D printing method,
energy consumption is reduced,printing is quick, safety is high, the production cost is lowered, and the 3D printing method can be widely used for 3D printing.