利用热源加热金属表面可以改善金属材料的力学特性，研究了红外连续激光对钛合金TC4材料表面进行加热后的温度场分布规律。基于傅里叶定律和能量守恒定律建立了导热微分方程及其定解条件，在ABAQUS中建立了移动热源的三维瞬态传热学仿真模型；为了校核激光加热仿真温度场的准确性，采用双色红外测温仪测量激光光斑中心温度，对仿真结果进行了验证。结果表明，实验与仿真结果相吻合，所建立的激光加热仿真模型能有效预测材料温度场的分布。利用ABAQUS软件对不同激光功率、扫描速度和光斑尺寸下的TC4钛合金温度场分布情况进行了仿真，仿真结果对优选激光热辅助加工时的激光参数有重要的参考价值。

In order to improve the mechanical properties of metallic materials and machining efficiency, a lot of investigations are carried out by external heating. An investigation on the temperature field distribution of TC4 titanium alloy heated by infrared continuous fiber laser is given. A thermal differential equation is established based on Fourier law and the law of conservation of energy. A transient, three-dimensional thermal model with moving heat source is developed in ABAQUS. To validate the simulation model of temperature field distribution, a two-color pyrometer is utilized to measure the temperature in laser spot center experimentally. The experimental results coincides with simulations, which prove that the simulation model can predict thermal field distribution effectively. After commissioning, the results suggest that laser heating simulation work effectively. Simulations on laser heating TC4 process under different laser powers, scanning velocity, and spot radius are conducted. The results can benefit the optimization in laser parameter during laser heat assisted machining.