Laser Oscillating of Nickel Alloyed Welds on Press‑Hardened Steel  

作　　者：Qian Sun Zhenghui Zhang Xiaonan Wang Qingyu Zhang Zhenguang Liu 

机构地区：[1]School of Mechanical and Electrical Engineering,Soochow University,Suzhou 215137,China [2]Shagang School of Iron and Steel,Soochow University,Suzhou 215137,China [3]School of Materials Science and Engineering,Jiangsu University of Science and Technology,Zhenjiang 212000,China

出　　处：《Chinese Journal of Mechanical Engineering》2022年第6期247-256,共10页中国机械工程学报（英文版）

基　　金：National Natural Science Foundation of China(Grant No.52005357);“Qinglan”Project of Jiangsu Province of China,and Jiangsu Provincial Natural Science Foundation of China(Grant No.BK 20180984).

摘　　要：Laser oscillating welding was employed to fabricate Al-Si coated press-hardened steel(PHS)to improve the element homogeneity in the fusion zone.Laser oscillating welding was employed with various oscillation amplitudes(0 mm,0.5 mm and 1.3 mm)in this present.Ni foil of 0.06 mm thickness was used as an interlayer between two tailored PHS welded.The weld morphology,elemental profile,microstructure and tensile strength of welded joints were studied.The results showed that full penetration weld without any weld defects were achieved for any oscillation amplitudes,and weld width increased with increasing oscillation amplitudes.With the oscillation amplitudes increased,Ni and Al had an uneven elemental profile due to strong stirring force,but the Ni and Al content in the weld was decreased and Ni had a sharp descent compared to Al element.Only fewδ-ferrite was presented in fusion line with the oscillation amplitudes increased to 1.3 mm.The oscillation amplitudes did not have an effect on the tensile properties,which was similar to that of base metal.But if keeping increasing the oscillation amplitudes or reducing the thickness of Ni interlayer,it has a potential risk to form more and moreδferrite such that deteriorate the mechnical properties of welded joints.

关 键 词：Laser oscillating welding Al-Si coating Press-hardened steel Nickel alloyed Microstructure and properties 

分 类 号：TG441.7[金属学及工艺—焊接]