本文選題：激光技術(shù) + 激光熔覆�。� 參考：《激光與紅外》2017年03期

【摘要】：以通過激光熔覆修復(fù)鈦合金薄壁件并在鈦合金表面獲得優(yōu)質(zhì)激光熔覆涂層為目標(biāo),運(yùn)用ANSYS軟件對同步送粉式激光熔覆的溫度場進(jìn)行了三維建模數(shù)值模擬。基于該模型對激光熔覆過程中的溫度場分布和工藝參數(shù)進(jìn)行了分析。結(jié)果表明,激光掃描方向前方的表面溫度場相比后方熔池溫度小,等溫線密集,溫度梯度大,熔覆兩道后熔覆道1沒有重熔,并且對熔覆道2產(chǎn)生預(yù)熱作用。激光加工的快速加熱和冷卻的特性顯著,冷卻時(shí)的冷卻速度可達(dá)10~4℃/s,在其他工藝參數(shù)不變的情況下,理論上在激光功率P=1100 W,掃描速度v=4 mm/s,光斑直徑d=1 mm時(shí)模擬過程可獲得良好的冶金結(jié)合,為修復(fù)薄壁零件提供了借鑒和指導(dǎo)作用。
[Abstract]:Aimed at repairing thin-walled titanium alloy by laser cladding and obtaining high quality laser cladding coating on titanium alloy surface, the temperature field of laser cladding with synchronous powder feeding was simulated numerically by using ANSYS software. Based on the model, the temperature field distribution and process parameters during laser cladding are analyzed. The results show that the surface temperature field in front of the laser scanning direction is smaller than that in the rear melting pool, the isotherm is dense, the temperature gradient is large, and the cladding channel 1 does not remelt after cladding. The rapid heating and cooling characteristics of laser processing are remarkable. The cooling rate can reach 10 ~ 4 鈩，

本文編號：1997421