Papers by Keyword: Steel Substrate

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Authors: M. Laribi, A.B. Vannes, Daniel Treheux
Abstract: To date, efforts forwarding to develop thermal spray coatings technology have been focused on increasing the durability and integrity of the coating. Improvement of mechanical characteristics such as wear resistance of the deposit, minimizing residual stress levels and reducing porosity are the main objectives of these works. The specific aim of this paper is to determine the wear resistance of molybdenum coating thermally sprayed on a steel substrate. This behavior has been determined using a simple ball-on-plate tribometer. Attention was given on the influence of a post-annealing at 850°C for one hour in vacuum and oil lubrication conditions.
47
Authors: Fu Tian Liu, S.X. Song, Jun Ru Yang, Wei Ling Huang, Zhao Qian Li
Abstract: By virtue of the technology characteristics of liquid-phase sintering ternary boride hard alloy cladding material, two steel plates were bonded together by a ternary boride hard alloy cladding material through a liquid phase sintering procedure. The bonding strength between a hard alloy cladding layer and a steel substrate was characterized by means of measuring the bonding strength of two steel plates bonded by the hard alloy cladding layer. The bonding strength between hard alloy cladding layer and the steel substrate was measured by transverse rupture strength method, tensile fracture method and single side shear method, respectively. The results show that a firm metallurgical bonding is formed during the liquid phase sintering.
136
Authors: Jian Fei Liu, Zhi Wang, Yin Sen Ding, Guo Pu Shi
Abstract: The composites of Fe/Al2O3 gradient coatings on steel substrate were prepared by spraying and sol-gel method, and the microstructure and performances of the composites were analyzed. The results show that the adhesion strength of Fe/Al2O3 gradient coatings with FeAlNi transitional layers reaches 25.3MPa when the sintering temperature is 1220°C, and the surface hardness of coatings is four times higher than that of steel substrate. The coatings are mainly composed of α-Al2O3, AlFeO3 and NiFe2O4. There is no obvious hole or macro-interface, while some organization similar to the branch appears in the coatings. The bonding of Fe/Al2O3 gradient coatings and steel substrate mainly depends on adsorption, diffusion and chemical combination.
1325
Authors: Sigurd Wagner, Ming Wu, Bock-Gi Robert Min, I-Chun Cheng
325
Authors: Atanu Banerjee, Monojit Dutta, Anil K. Bhowmick, Tapas Laha
Abstract: The effect of Cu-Sn coating on steel towards improving the adhesion between steel and typical styrene butadiene rubber (SBR) based tyre bead composition has been investigated in this work. Steel coupons were coated with varying compositions of Cu-Sn via immersion coating, where the electrolyte bath composition was varied. Chemical analysis of the coatings using ICP-OES confirmed increase in Sn content with increasing SnSO4 concentration in the coating baths, keeping other parameters constant. No change in the coating weight was observed with change in Sn concentration in the coatings. Bare spots on the coating surface was observed under SEM XPS analysis confirmed formation of Fe oxide at the bare locations. The coated steel plates were vulcanized with SBR based rubber and peel strength was measured. The results confirmed an optimum Sn concentration of 3 - 4 wt% in the coatings up to which an increase (~ 25%) in adhesion strength was exhibited compared to only Cu coatings. Stereo-microscopic analysis of the peel tested samples validated mixed mode i.e. both adhesive and cohesive modes of failure.
1438
Authors: Atanu Banerjee, Monojit Dutta, Anil K. Bhowmick, Tapas Laha
Abstract: The effect of Cu-Sn coating on steel towards improving the adhesion between steel and typical styrene butadiene rubber (SBR) based tyre bead composition has been investigated in this work. Steel coupons were coated with varying compositions of Cu-Sn via immersion coating, where the electrolyte bath composition was varied. Chemical analysis of the coatings using ICP-OES confirmed increase in Sn content with increasing SnSO4 concentration in the coating baths, keeping other parameters constant. No change in the coating weight was observed with change in Sn concentration in the coatings. Bare spots on the coating surface was observed under SEM XPS analysis confirmed formation of Fe oxide at the bare locations. The coated steel plates were vulcanized with SBR based rubber and peel strength was measured. The results confirmed an optimum Sn concentration of 3 - 4 wt% in the coatings up to which an increase (~ 25%) in adhesion strength was exhibited compared to only Cu coatings. Stereo-microscopic analysis of the peel tested samples validated mixed mode i.e. both adhesive and cohesive modes of failure.
1536
Authors: Yao Zong Zhang, Jian Bo Huang, H.P. Wang, X. Lin
Abstract: This paper discusses the issues about the incorruptibility of industrial dies, mainly researches the G111WC and G112WC mixed alloy layer sprays fusing on the surface of industrial dies under the vacuum condition and the solid phase welding-on mechanism of the mixed alloy layer under superplastic state. It points out that when W≈1 ( W is strain ratio of coating and substrate ) and within the range of the generatrix’s superplasticity, the layer and the generatrix will realize the solid state diffusion joining by superplastic coordinate deformation, which leads to an effective welding.
399
Authors: Wei Ling Huang, Fu Tian Liu, Chuan Zhen Huang, Zhao Qian Li, F. Dong
Abstract: Using Mo powder, B-Fe alloy powder and Fe powder as raw materials, with proper forming additives, the slurry was prepared. The green body was formed by spray method on both sides of 16Mn and Q235 steel substrate separately. Both side ternary boride based cermet cladding materials FC-V16Mn and FC-VCuQ235 were fabricated by liquid phase sintering technology. Both materials have high hardness, bending strength and good corrosion resistance.
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