Effect of laser power on molten pool evolution and convection

被引：20

作者：

Song, Boxue ^{[1
]}

Yu, Tianbiao ^{[1
]}

Jiang, Xingyu ^{[2
]}

Xi, Wenchao ^{[1
]}

Lin, Xiaoli ^{[3
]}

机构：

[1] Northeastern Univ, Sch Mech Engn & Automat, 3-11 Wenhua Rd, Shenyang 110870, Liaoning, Peoples R China

[2] Shenyang Univ Technol, Sch Mech Engn, 111 Shenliao West Rd, Shenyang 110870, Liaoning, Peoples R China

[3] Northeastern Univ, Sch Comp Sci & Engn, Shenyang, Liaoning, Peoples R China

来源：

NUMERICAL HEAT TRANSFER PART A-APPLICATIONS | 2020年 / 78卷 / 02期

关键词：

NUMERICAL-SIMULATION; FLUID CONVECTION; THERMAL-BEHAVIOR; PARAMETERS; TRANSPORT; POWDER; SOLIDIFICATION; ALLOY; MODEL; BEAD;

D O I：

10.1080/10407782.2020.1777795

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The cladding layer formed by laser cladding is formed by solidification of the molten pool. The quality of the cladding layer is directly determined by the evolution of the molten pool. The numerical simulation of the evolution of the molten pool is carried out, revealing the relationship between different powers and the evolution of the molten pool. The results show that the volume of the molten pool exhibits a nonlinear expansion of "expansion-shrinkage-re-expansion" before reaching the steady state, and the volume and expansion rate of the molten pool are determined by the laser power. In addition, the degree of shrinkage of the molten pool and the speed of convection can also be controlled by the laser power. When the laser power reaches a certain level, evaporation occurs on the surface of the molten pool. The convection pattern of the molten pool can be changed by evaporation. However, due to the impact of shielding gas and Marangoni movement, the effect of evaporation on the geometry of the cladding layer is limited.

引用

页码：48 / 59

页数：12

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