Effect of Composition on the Mechanical Properties and Wear Resistance of Low and Medium Carbon Steels with a Biomimetic Non-Smooth Surface Processed by Laser Remelting

Abstract

To study the effect of laser biomimetic treatment on different material compositions, five kinds of steels with different carbon element contents were studied by laser remelting. The characteristics (depth, width), microstructure, hardness, tensile properties, and wear resistance of the samples were compared. The results show that when the laser processing parameters are fixed, the characteristics of the unit increase with an increase of carbon element content. Moreover, the hardness of the unit also increases. Compared with the untreated samples, when the carbon content is 0.15–0.45%, the tensile strength of the laser biomimetic samples is higher than that of the untreated samples. For the biomimetic samples with different carbon content, with an increase of carbon content, the tensile strength increases first and then decreases, while the plasticity of the biomimetic samples decreases continuously. The bionic samples have better wear resistance than that of the untreated samples. For bionic specimens with different carbon elements, wear resistance increases with an increase of carbon element content.

Advances in Laser Materials Processing

“…Laser surface treatment to repair surface defects and cracks in irons, steels, and composites [13][14][15][16]; 3.…”

“…Five kinds of low and medium carbon steels with different carbon element contents (Steel 1-0.15%, Steel 2-0.25%, Steel 3-0.37%, Steel 4-0.45%, Steel 5-0.58%) were studied by laser remelting [15]. Laser process parameters were: an energy level of 16.88 J, pulse a duration of 8 ms, a frequency of 5 Hz, a scanning speed of 1 mm/s, and a beam diameter of 1.59 mm.…”

Bionic Repair of Thermal Fatigue Cracks in Ductile Iron by Laser Melting with Different Laser Parameters

“…Laser bionics has been recommended for processing points, strips, and nets on material surfaces to prepare non-smooth surfaces with improved thermal fatigue resistance and tensile properties [19]. According to Zhou et al [20,21], lasers with different parameters have different effects on improving the thermal fatigue properties of materials. All the aforementioned studies were aimed at improving the thermal fatigue resistance of materials, however, how to repair the thermal fatigue cracks of nodular iron brake discs is not mentioned.…”

Effects of Laser Melting Distribution on Wear Resistance and Fatigue Resistance of Gray Cast Iron

“…For example, the non-smooth hard scales on the backs of lizards, rock lizards, and scorpions are coupled with multiple layers of flexible connective tissue that lie just under the skin, which allows these species to have excellent resistance to erosion in desert environments. The excellent wear resistance of conch and other seashells depends on the coupling of non-smooth composite morphology, multilayer structures, and special materials [21,22].…”