The mechanical properties and corrosion resistance of selective laser melting 30CrMnSiA steel

Abstract

Purpose The purpose of this paper is to study the mechanical and corrosion behaviors of selective laser melting (SLM) 30CrMnSiA steel. Design/methodology/approach The microstructure, mechanical behavior and corrosion resistance of SLM 30CrMnSiA steel were studied by electrochemical test and immersion experiment. Findings The results showed that the microstructure of SLM 30CrMnSiA steel contained equiaxed fine (25.0 µm) ferrite and lamellar pearlite. The tensile strength of SLM 30CrMnSiA steel under the process parameters is 1,447 MPa and the elongation is 7.5%. As the immersion/salt spray test time increased to 15 days/48 h, corrosion mainly occurred in the local position of the sample and corrosion resistance decreased. When the immersion/salt spray test time increased to 30 days/168 h, the corrosion production covered the surface of the samples and the corrosion resistance increased. Originality/value The paper can guide the application and in situ repair for low-alloy steel by additive manufacturing.

Crevice corrosion behavior and mechanism of laser additive manufacturing nickel-based alloy under wedge-shaped crevice by using wire beam electrode

“…Laser additive manufacturing (LAM), also known as laser 3 D printing, is a manufacturing method based on laser technology. In recent years, LAM plays an important role in the remanufacturing and repairing of engineering parts due to material versatility, rapid molding ability and efficient resource utilization (Li and Kong, 2022; Ni et al , 2019; Zhang et al , 2020). LAM technique as a successful method to prepare the key component of the equipment applied in oil and gas field faces the threat of failure as well (Illing et al , 2023).…”