Heat treatment method for selective laser melting pure tantalum part, product and application thereof

The invention discloses a heat treatment method for a selective laser melting pure tantalum workpiece and a product and application thereof, and relates to the technical field of advanced manufacturing of metal materials. The heat treatment method mainly comprises the steps that stress relief annealing and high-pressure heat treatment are conducted on the pure tantalum workpiece formed through selective laser melting. The internal pores, microcracks and the like of the treated pure tantalum workpiece are obviously improved, the fatigue source is obviously reduced, crystal grains are uniform and fine, lateral columnar crystal grains are reduced, and tiny keyholes and microcracks are bridged, so that the fatigue performance of the pure tantalum workpiece is improved. In addition, the pure tantalum part prepared through the method has important significance on additive manufacturing of metal tantalum implant parts. 本发明公开了一种选区激光熔化纯钽制件的热处理方法及其产品和应用，涉及金属材料先进制造技术领域。热处理方法主要包括将选区激光熔化成形的纯钽制件进行去应力退火和高压热处理。处理后的纯钽制件的内部孔隙和