本申请公开一种再制造用钢粉末的制备方法,包括以下步骤：1).将钢料根据等离子旋转电极雾化设备的要求进行加工成钢棒材；2).在一定的环境条件下,将加工后的钢棒材作为阳电极置于雾化炉内,充入保护气体,对雾化炉体进行抽真空；3).设置工艺参数启动等离子旋转电极雾化设备,钢棒材进行高速旋转,等离子体枪形成转移弧加热熔化钢棒材的一端,使雾化室内钢棒材熔化后的钢液滴在离心力的作用下甩出,钢液滴冷却在表面张力的作用下形成钢粉末；4).制粉完成后,雾化炉内保持高压4～5小时,待粉末冷却后筛分,并真空包装。本发明制得的钢粉末粒度分布窄、细粉收得率高、球形度高、氧含量低、松装密度高、流动性更好,满足汽车零部件再制造粉末要求。

The present application discloses a method for preparing steel powder for remanufacturing, comprising the following steps: 1). Processing the steel material into steel rods according to the requirements of the plasma rotary electrode atomization equipment; 2). Under certain environmental conditions, the processed steel bar is placed in the atomizing furnace as the positive electrode, charged with protective gas, and the atomizing furnace body is evacuated; 3). Set the process parameters to start the plasma rotating electrode atomizing equipment, the steel bar rotates at high speed, and the plasma gun forms a transfer arc to heat one end of the melted steel bar, so that the melted steel droplets in the atomizing chamber are thrown out under the action of centrifugal force, and the steel droplets are cooled to form steel powder under the action of surface tension; 4). After the powder is finished, the atomization furnace to maintain high pressure 4 ~ 5 hours, after the powder is cooled and sieved, and vacuum packaging. The steel powder made by the invention has narrow particle size distribution, high yield of fine powder, high sphericity, low oxygen content, high bulk density and better flowability, which meets the requirements of auto parts remanufacturing powder.