Effects of substrate microstructure on biomimetic unit properties and wear resistance of H13 steel processed by laser remelting

Zang, Chuanlong; Zhou, Ti; Zhou, Hong; Yuan, Ye; Zhang, Peng; Meng, Chao; Zhang, Zhihui

doi:10.1016/j.optlastec.2018.04.022

Cited by 32 publications

(12 citation statements)

References 22 publications

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“…This can change the structure of the brake drum base metal, refine the grain, and greatly improve hardness, strength, and toughness [1][2][3]. By imitating the biological characteristics of organisms that exist in nature that show excellent wear and fatigue resistance [4,5], a bionic functional surface similar to the surface of such organisms can be fabricated by applying a laser to the inner wall of a gray cast iron brake drum [6,7]. The structure of the base metal of the brake drum can be irradiated by a laser [8,9], causing it to melt rapidly and then solidify again instantaneously [10].…”

Section: Introductionmentioning

confidence: 99%

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

Yang

Zhou

Wang

et al. 2020

Metals

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The coupling bionic surface is generally prepared by laser melting on the surface of a gray iron brake hub, which can allow the brake hub to achieve excellent wear resistance and fatigue resistance. The designs of most previous experiments have been based on independent units that were uniform in their distribution patterns. Although some progress has been made in the optimization of cell features, there is still room for further improvement with respect to bionics and experimental optimization methods. Here, experiments on units with non-uniform distributions of different distances were used to rearrange and combine the bionic elements. This paper is that the original uniform distribution laser melting strengthening model was designed as a non-uniform distribution model, and the heat preservation and tempering strengthening effect of continuous multiple melting strengthening on the microstructure of the melting zone is discussed. The mechanism of crack initiation and the mode of crack propagation were analyzed. The relationship between the internal stress in the melting zone and the crack initiation resistance was also discussed. In this paper, the mechanism of different spacing distribution on the surface of gray cast iron by laser remelting is put forward innovatively and verified by experiments, which provides a solid theoretical basis for the follow-up industrial application.

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Section: Introductionmentioning

confidence: 99%

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

Yang

Zhou

Wang

et al. 2020

Metals

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“…This universality results from the fact that laser is precise, non-contact and easy to control heat source [1]. Laser remelting helps to increase corrosion resistance, surface quality, and mechanical properties of bulk materials [2,3,4,5] and to improve homogeneity and adhesion to substrate of pre-deposited coatings [6,7]. Improvements in surface properties are enhanced if additional materials are delivered to the molten pool [8,9,10].…”

Section: Introductionmentioning

confidence: 99%

Laser Alloying Monel 400 with Amorphous Boron to Obtain Hard Coatings

2019

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In this study, Monel 400 is laser heat treated and laser alloyed with boron using diode laser to obtain adequate remelting and to improve the microhardness Single laser tracks were produced on the surface with three different laser beam scanning velocities: 5, 25, and 75 m/min. In order to enrich Monel 400 with boron surfaces were covered with initial layers of two different thicknesses before the process: 100 μm and 200 μm. In all experiments, laser beam power density was equal to 178 kW/cm2. Produced laser tracks were investigated in areas of microstructure, depth of remelting and microhardness. It was found that remelted zones are mainly composed of dendrites and the more boron is present in the laser track, the dendritic structure more fragmented is. Depth of remelting and microhardness depend not only on the laser beam scanning velocity but also on thickness of the initial boron layer. While microhardness of Monel 400 is equal to approximately 160 HV0.1, microhardness up to 980 HV0.1 was obtained in areas laser alloyed with boron.

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“…For example, Meng [24] studied the unit microstructure and thermal fatigue resistance of different kinds of die steel after laser biomimetic treatment. Zang [25] compared the microstructure and mechanical properties of H13 steel with different microstructures after laser biomimetic treatment. At present, the effect of the material composition on laser biomimetic treatment is rarely discussed in the literature.…”

Section: Introductionmentioning

confidence: 99%

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

Chang

Zhou

et al. 2019

Metals

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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.

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Effects of substrate microstructure on biomimetic unit properties and wear resistance of H13 steel processed by laser remelting

Cited by 32 publications

References 22 publications

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

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

Laser Alloying Monel 400 with Amorphous Boron to Obtain Hard Coatings

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

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