Effect of Fe and Ni contents on microstructure and wear resistance of aluminum bronze coatings on 316 stainless steel by laser cladding

Laser Metal Deposition Shaping (LMDS) is a Rapid Manufacturing (RM) process that can be classified under the area of layered manufacturing techniques, where parts are built in layers. Parts of any complexity can be built directly from the 3D CAD model without much human intervention and requires minimum post-processing. In fact, LMDS technique can be recognized as multilayer laser cladding. Accordingly, it is necessary to perform the elementary laser cladding experiments with common metal powder so as to better understand the LMDS process. Then the characteristics of microstructure, composition and phase of as-deposited clads were analyzed through SEM and XRD, as well as relative model. The results prove that the microstructure of 316 stainless steel deposits is composed of the slender dendrites growing epitaxially from the substrate, and the composition is uniform without obvious segregation. Besides, it can be deduced from XRD diagram that the microstructure is composed of mono-phase γ.

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Laser Cladding of Ni-Co-W Composite Coating on Stainless Steel to Enhance Wear Resistance

Materials Science ◽

10.5755/j02.ms.28686 ◽

2021 ◽

Author(s):

Linlin ZHANG ◽

Dawei ZHANG

Keyword(s):

Stainless Steel ◽

Wear Resistance ◽

Composite Coating ◽

Laser Cladding ◽

Composite Coatings ◽

Eutectic Structure ◽

Wear Properties ◽

Fine Grained ◽

Noticeable Improvement ◽

Enhance Wear Resistance

Ni-Co-W composite coatings modified by different contents of Co-based alloy powder in the Ni-based alloy with 35 wt.% WC (Ni35WC) were deposited on stainless steel by laser cladding. The influence of compositional and microstructural modification on the wear properties has been comparatively investigated by XRD, SEM, and EDS techniques. It was found that the austenite dendrites in the modified coating adding 50 wt.% Co-based alloy were refined and a lot of Cr23C6 or M23(C, B)6 compounds with fine lamellar feature were formed around austenitic grain boundaries or in the intergranular regions. The contribution of element Co to the modification of Ni35WC coating is that it cannot only promote the formation of more hard compounds to refine austenite grains, but also refine the size of precipitates, and change the phase type of eutectic structure as a result of disappeared Cr boride brittle phases. A noticeable improvement in wear resistance is obtained in the Ni35WC coating with 50 wt.% Co-based alloy, which makes the wear rate decreased by about 53 % and 30% by comparison to that of the substrate and the Ni35WC coating, respectively. It is suggested that the improvement is closely related to the composite coating being strengthened owing to the increase of coating hardness, formation of a fine-grained microstructure caused by Co, and fine hard precipitate phases in the eutectic structure.

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Experimental study on the influence of friction pair material hardness on the tribological behaviors of water lubricated thrust bearings

Industrial Lubrication and Tribology ◽

10.1108/ilt-03-2021-0083 ◽

2021 ◽

Vol ahead-of-print (ahead-of-print) ◽

Author(s):

Xingxin Liang ◽

Zhiyong Yang

Keyword(s):

Stainless Steel ◽

Wear Resistance ◽

Abrasive Wear ◽

Friction Pair ◽

Aluminum Bronze ◽

Heavy Load ◽

Content Type ◽

Thrust Bearings ◽

Tribological Behaviors ◽

Polymer Bearing

Purpose This paper aims to confirm that increasing the hardness of thrust collars can improve the load carrying capacity (LCC) and wear resistance of water lubricated thrust bearings (WTBs) made of polymers paired with non-polymeric thrust collars, and to design a WTB with high LCC and durability for a shaftless pump-jet propulsor of an autonomous underwater vehicle. Six kinds of WTBs were manufactured by matching aluminum bronze, stainless steel and silicon nitride with two different polymer bearing materials. Their tribological behaviors were tested and compared. Design/methodology/approach The tribological behaviors of the WTBs made with different materials were investigated experimentally on a specially designed test rig. Findings Aluminum bronze is not suitable for crafting thrust collars of heavy load WTBs due to severe abrasive wear. Two body abrasive wear first occurred between the thrust collar and the polymer bearing. Next, aluminum bronze wear particles were produced. The particles acted between the two materials and formed three body abrasive wear. Stainless steel/polymer bearings showed better wear resistance while Si3N4/polymer bearings were the best. Improving the hardness of thrust collars is significant to the LCC and service life of WTBs. Originality/value The wear mechanism of WTBs under heavy load conditions was revealed. Improving the hardness of the thrust collar was confirmed to be a preferable method to improve the wear resistance and LCC of WTBs. The results of this study may provide an important reference for the selection of water lubricated materials and the design of heavy load WTBs.

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Laser Cladding of Ni60/WC/TiN Composite Coatings on 00Cr13Ni4Mo Hydro Turbine Blade Stainless Steel for Improvement of Wear Resistance

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.430-432.101 ◽

2012 ◽

Vol 430-432 ◽

pp. 101-105

Author(s):

Kai Jin Huang ◽

Hua Rui Jiang ◽

Xin Lin

Keyword(s):

Stainless Steel ◽

Wear Resistance ◽

Turbine Blade ◽

Laser Cladding ◽

Composite Coatings ◽

High Hardness ◽

Dry Sliding Wear ◽

Wear Property ◽

Hydro Turbine ◽

Wear Condition

To improve the wear property of 00Cr13Ni4Mo hydro turbine blade stainless steel, Ni-based composite coatings were fabricated on 00Cr13Ni4Mo stainless steel by laser cladding using mixed powders of Ni60, WC and TiN. The microstructure of the coatings was characterized by XRD and SEM techniques. The wear resistance of the coatings was evaluated under dry sliding wear condition at room temperature. The results show that the coatings mainly consist of Ni-based solid solution, WC and TiN phases. The coatings exhibit excellent wear resistance due to its high hardness of WC and TiN phases. The main wear mechanisms of the coatings and the 00Cr13Ni4Mo sample are different, the former is abrasive wear and the latter is adhesive wear.

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Study of Cracking Mechanism and Wear Resistance in Laser Cladding Coating of Ni-based Alloy

Chinese Journal of Mechanical Engineering ◽

10.1186/s10033-021-00599-8 ◽

2021 ◽

Vol 34 (1) ◽

Author(s):

Zhenglei Yu ◽

Lunxiang Li ◽

Deqiang Zhang ◽

Guangfeng Shi ◽

Guang Yang ◽

...

Keyword(s):

Stainless Steel ◽

Wear Resistance ◽

Rare Earth ◽

Fracture Mechanics ◽

Composite Coating ◽

Laser Cladding ◽

Rare Earth Oxide ◽

Cracking Mechanism ◽

Crack Susceptibility ◽

The Rare Earth

AbstractNickel-based alloy coatings were widely used for the remanufacturing of dies and moulds by laser cladding, but the crack sensitivity would be increase due to the higher strength and hardness, which reduced the wear resistance of Ni-based alloys. In this paper, Ni-based coatings with the addition of a plastic phase (an austenitic stainless net) were prepared using laser cladding technology, and the CeO2 was added in cladding layers. The cracking mechanism, microhardness, microstructure, phase composition, and wear properties were investigated. The relationship between thermal stress and the elastic and plastic fracture had been developed from the standpoint of fracture mechanics and thermal elastic fracture mechanics. The fracture criterion of the nickel-based coating was obtained, and the study has shown that the crack sensitivity could be reduced by decreasing the thermal expansion coefficient Δα. Thus, a new method was proposed, which the stainless steel nets were prefabricated on the substrate. It was found that the number of cracks reduced significantly with the addition of stainless steel net. When the stainless steel net with 14 mesh was added in Ni-based coatings, the average microhardness of nickel composite coating was 565 HV0.2, which was 2.6 times higher than that of the 45 steel substrate. Although the rare earth oxide 4 wt.% CeO2 and stainless steel net were added in the Ni-based coating reducing the microhardness (the average microhardness is 425 HV0.2), the wear resistance of it improved substantially. The wear volume of Ni-based composite coating was 0.56×10−5 mm3·N−1·m−1, which was 85.1% lower than that of 45 steel. The experiment results have shown that the Nickel-based composite coating is equipped with low crack sensitivity and high abrasive resistance with austenitic stainless net and the rare earth oxide 4 wt.% CeO2. This research offers an efficient solution to produce components with low crack susceptibility and high wear-resistance coatings fabricated by laser cladding.

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Wear Properties of Paste Boronized 316 Stainless Steel Before and After Shot Blasting Process

Scientific Research Journal ◽

10.24191/srj.v11i2.5425 ◽

2014 ◽

Vol 11 (2) ◽

pp. 75

Author(s):

Muhamad Hafizuddin Mohamad Basir ◽

Bulan Abdullah ◽

Siti Khadijah Alias

Keyword(s):

Stainless Steel ◽

Wear Resistance ◽

Surface Deformation ◽

Wear Behaviour ◽

Stainless Steel Surface ◽

Shot Blasting ◽

Wear Properties ◽

Deformation Method ◽

316 Stainless Steel ◽

Before And After

This research investigates and analyzes wear properties of 316 stainless steel before and after applying paste boronizing process and to investigate the effect of shot blasting process in enhancing boron dispersion into the steel. In order to enhance the boron dispersion into 316 stainless steel, surface deformation method by shot blasting process was deployed. Boronizing treatment was conducted using paste medium for 8 hours under two different temperatures which were 8500C and 9500C. Wear behaviour was evaluated using pin-on-disc test for abrasion properties. The analysis on microstructure, X-ray Diffraction (XRD) and density were also carried out before and after applying boronizing treatment. Boronizing process that had been carried out on 316 stainless steel increases the wear resistance of the steel compared to the unboronized 316 stainless steel. The effect of boronizing treatment together with the shot blasting process give a greater impact in increasing the wear resistance of 316 stainless steel. This is mainly because shot blasted samples initiated surface deformation that helped more boron dispersion due to dislocation of atom on the deformed surface. Increasing the boronizing temperature also increases the wear resistance of 316 stainless steel. In industrial application, the usage of the components that have been fabricated using the improved 316 stainless steel can be maximized because repair and replacement of the components can be reduced as a result of improved wear resistance of the 316 stainless steel.

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Enhanced wear resistance and new insight into microstructure evolution of in-situ (Ti,Nb)C reinforced 316 L stainless steel matrix prepared via laser cladding

Optics and Lasers in Engineering ◽

10.1016/j.optlaseng.2020.106043 ◽

2020 ◽

Vol 128 ◽

pp. 106043 ◽

Cited By ~ 4

Author(s):

Mingyang Zhang ◽

Min Li ◽

Shufeng Wang ◽

Jing Chi ◽

Liangshuai Ren ◽

...

Keyword(s):

Stainless Steel ◽

Wear Resistance ◽

Laser Cladding ◽

Microstructure Evolution ◽

Steel Matrix ◽

316 L Stainless Steel ◽

Insight Into

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Laser Cladding of TiN-Based Coating on 00Cr13Ni4Mo Hydro Turbine Blade Stainless Steel for Improvement of Wear Resistance

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.664.726 ◽

2013 ◽

Vol 664 ◽

pp. 726-730 ◽

Cited By ~ 1

Author(s):

Kai Jin Huang ◽

Yu Yue Wang

Keyword(s):

Stainless Steel ◽

Wear Resistance ◽

Turbine Blade ◽

Laser Cladding ◽

Sliding Wear ◽

High Hardness ◽

Wear Behaviour ◽

Dry Sliding Wear ◽

Hydro Turbine ◽

Wear Condition

To improve the wear propery of 00Cr13Ni4Mo hydro turbine blade stainless steel, TiN-based coating was fabricated on 00Cr13Ni4Mo stainless steel by laser cladding using mixed powders of Ni60 and TiN. The microstructure of the coating was characterized by XRD and SEM techniques. The wear behaviour of the coating was also investigated. The wear resistance of the coating was evaluated under dry sliding wear condition at room temperature. The results show that the coating mainly consists of Ni-based solid solution and TiN phases. The coating exhibits excellent wear resistance due to its high hardness of TiN phase. The main wear mechanisms of the coating and the 00Cr13Ni4Mo sample are different, the former is abrasive wear and the latter is adhesive wear.

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