The effects of laser power on the formation, texture evolution, and mechanical properties of 316 L stainless steel fabricated by laser-arc hybrid additive manufacturing were studied. The results showed that the surface accuracy was first improved and then degraded with increasing laser power, because the stability of the molten pool first rose and then fell with the rising laser power. Additionally, the microhardness decreased with the increase in deposition height, but the trend became weaker with further heat accumulation. When the laser power was amplified from 500 to 2000 W, the molten pool gradually changed from the conduction to keyhole mode (KM), and the cube texture content increased from 0% to 65.5%. A 5.5% Goss texture was generated in the KM at 2000 W, because the migration of the solid–liquid interface gradually deviated to the <011> direction. Furthermore, the KM expanded the range of the remelted zone, the number of bonding layers, and the content of grains with low misorientation angle significantly. Therefore, the ultimate tensile strength of the part produced in the KM was able to reach 600 MPa, higher than that of the conduction mode part (520–530 MPa) fabricated at a lower laser power.

激光功率对316的形成、织构演变和力学性能的影响 研究了激光-电弧混合增材制造制造的L型不锈钢。结果表明，表面精度随着激光功率的增加先提高后下降，因为熔池的稳定性随着激光功率的增加先上升后下降。此外，显微硬度随着沉积高度的增加而降低，但随着热量的进一步积累，这种趋势变弱。当激光功率从 500 W 放大到 2000 W 时，熔池逐渐从传导模式转变为锁孔模式（KM），立方体织构含量从 0% 增加到 65.5%。在 2000 W 的 KM 中产生 5.5% 的 Goss 纹理，因为固-液界面的迁移逐渐偏离 <011> 方向。此外，KM 扩大了重熔区的范围，结合层数和低取向角晶粒的含量显着增加。因此，在 KM 中生产的零件的极限抗拉强度能够达到 600 MPa，高于 以较低激光功率制造的传导模式部件（520-530 MPa）。