Title: Performance analysis of high-speed laser cladding Fe55 alloy coatings via inside-laser powder feeding

Authors: Yu Xie; Shuokun Ma; Tuo Shi; Siqi Yu; Shuguang Wang

Addresses: School of Optoelectronic Science and Engineering, Soochow University, Suzhou 215021, China ' School of Optoelectronic Science and Engineering, Soochow University, Suzhou 215021, China ' School of Optoelectronic Science and Engineering, Soochow University, Suzhou 215021, China ' School of Optoelectronic Science and Engineering, Soochow University, Suzhou 215021, China ' School of Optoelectronic Science and Engineering, Soochow University, Suzhou 215021, China

Abstract: To improve the surface performance of 304 stainless steel, a Fe55 alloy coating with excellent wear and corrosion resistance was fabricated using high-speed laser cladding with an innovative inside-laser powder feeding method. The effects of laser power, defocus distance, and scanning speed on the coating morphology were studied. SEM and XRD analyses were conducted along with microhardness, wear, and electrochemical corrosion tests. Optimal parameters were identified: 1850 W laser power, 24 m/min scanning speed, +2 mm defocus, 16.8 g/min powder feed rate, and 80% overlap. The resulting coating was smooth, defect-free, had a dilution rate below 5%, and showed improved hardness and corrosion resistance compared to the stainless steel substrate. This efficient and eco-friendly technique has promising potential for advanced surface enhancement applications.

Keywords: laser high-speed cladding; inside-laser powder feeding; Fe55 alloy; surface coating; microstructure.

DOI: 10.1504/IJSURFSE.2025.149459

International Journal of Surface Science and Engineering, 2025 Vol.19 No.4, pp.298 - 317

Received: 07 Jan 2025
Accepted: 14 Apr 2025
Published online: 01 Nov 2025 *

Full-text access for editors Full-text access for subscribers Purchase this article Comment on this article