(1. 上海交通大學(xué) 材料科學(xué)與工程學(xué)院 特種材料研究所，金屬基復(fù)合材料國(guó)家重點(diǎn)實(shí)驗(yàn)室，上海 200240；
2. 上海交通大學(xué) 安徽(淮北)陶鋁新材料研究院，淮北 235000)
摘 要: 工業(yè)界對(duì)高品質(zhì)、高效率激光制造提出了越來(lái)越高的要求，提高激光制造的能量吸收率具有巨大的市場(chǎng)需求。2017年，波長(zhǎng)為450 nm左右的短波長(zhǎng)250 W高功率藍(lán)激光器問(wèn)世，顯著提高了銅、金、鋁、銀等有色金屬的吸收率，并逐步應(yīng)用于焊接、熱處理、增材制造等材料成形領(lǐng)域。本文分析了短波長(zhǎng)藍(lán)激光提升材料吸收率的原理，總結(jié)了高功率藍(lán)激光器的發(fā)展歷程、藍(lán)激光在焊接和增材制造等領(lǐng)域的應(yīng)用現(xiàn)狀，結(jié)合作者在該領(lǐng)域的研究經(jīng)驗(yàn)提出了對(duì)于高功率藍(lán)激光應(yīng)用于有色金屬成形領(lǐng)域發(fā)展方向的思考。
關(guān)鍵字: 有色金屬；增材制造；焊接；藍(lán)激光；吸收率
（1. State Key Laboratory of Metal Matrix Composites, Special Material Institute, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;
2. Institute of Alumics Materials, Shanghai Jiao Tong University (Anhui), Huaibei 235000, China）
Abstract:Laser manufacturing with high quality and efficiency is urgently required by the industry, while improving the absorption rate in the manufacturing process is the key method to reach the goal. In 2017, a 250W high power blue laser system with the wavelength around 450 nm was developed, which significantly improved the absorption rate in laser processing of Cu, Au, Al, Ag, and so on. Since then, the blue laser has been increasingly used in welding, heat treatment, additive manufacturing, and so on. This paper analyzes the mechanism of high absorption rate at a shorter laser wavelength, reviews the development roadmap of the high power blue laser system and summarizes the current status of applying the blue laser in welding and additive manufacturing. Finally, the development trend in this emerging field is suggested based on the experiences of the researchers.
Key words: additive manufacturing; welding; blue laser; absorption rate; nonferrous metals
