CAJ | 학술논문

　　为了分析激光对接焊TC4钛合金薄板的焊接过程，以ANSYS软件为平台采用有限单元法建立了非线性瞬态热传导模型，模拟计算了焊接时的3维瞬态温度场；数值模拟过程中考虑了材料热物理性能参量的温度依存性，并利用APDL语言编程实现了移动高斯分布面热源模型的加载。结果表明，激光焊接过程中的温度场由非稳态到稳态，最终呈现出流星状的稳定分布，焊缝附近等温线密集，焊缝的热影响区小；模拟得到的焊缝形状与试验获得的焊缝形状相吻合；模拟获得的400℃临界温度以上区域的尺寸范围为42.00mm ×10.56mm。该研究验证了模拟方法的正确性，为焊接保护装置设计提供了依据。
　　위료분석격광대접한TC4태합금박판적한접과정，이ANSYS연건위평태채용유한단원법건립료비선성순태열전도모형，모의계산료한접시적3유순태온도장；수치모의과정중고필료재료열물이성능삼량적온도의존성，병이용APDL어언편정실현료이동고사분포면열원모형적가재。결과표명，격광한접과정중적온도장유비은태도은태，최종정현출류성상적은정분포，한봉부근등온선밀집，한봉적열영향구소；모의득도적한봉형상여시험획득적한봉형상상문합；모의획득적400℃림계온도이상구역적척촌범위위42.00mm ×10.56mm。해연구험증료모의방법적정학성，위한접보호장치설계제공료의거。
In order to analyze the laser butt welding process of Ti 6Al4V(TC4)alloy sheet, a nonlinear transient heat conduction model was established by means of the finite element analysis and the distribution of the 3-D transient temperature was calculated with ANSYS .In the process, it was taken into account that the material thermophysical properties varied with temperature , and the loading and moving of the Gaussian heat source were realized using the APDL programming languages .The results show that the temperature field changes from non-steady state to state , and eventually present a stable meteor-shape distribution, the isotherms are dense near the weld and the heat affected zone is narrow .The simulated weld profile matches well with the experiment result .According to the simulation results , the dimension of the area where temperature is above 400℃ is 42.00mm ×10.56mm.The study proved the correctness of the simulation method, and provided references for the design of welding protection device .