Thermally sprayed finestructured WC-12Co coatings finished by ball burnishing and grinding as an innovative approach to protect forming tools against wear

Tillmann, Wolfgang; Hollingsworth, Peter S.; Baumann, I.; Hiegemann, Lars; Weddeling, Christian; Tekkaya, A. Erman; Rausch, Sascha; Biermann, Dirk

doi:10.1016/j.surfcoat.2014.06.039

Cited by 30 publications

(7 citation statements)

References 9 publications

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“…NixWyC is formed because of the presence of oxygen in the air and high temperature. At this condition, the tungsten carbide (WC) can transform to W2C, and the decomposition of the reaction dissolves into the Ni matrix and carbide (NixWyC) [4]. The high temperature and O2 content in this study came from the fire spray method used.…”

Section: Experiments Results and Discussionmentioning

confidence: 99%

Surface Mechanical Properties of Tool Steel on the Addition of Carbon Nanotubes with the Process of Flame Spray Tungsten Carbide Coatings

Mudiantoro

Gerry

Winarto³

et al. 2020

MSF

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Tungsten Carbide (WC) hard coating is widely used to coat the surface of the steel tools which provide tribological properties. In this paper, 0.25 wt% & 0.35 wt% of Carbon Nanotubes (CNT) were mixed with tungsten carbide (WC) powders as the feedstock powders. Method of solution dispersion in ethanol media using an ultrasonic device was used for coating the surface of WC powders with CNT powder. The mixed powders were then used as the feedstock powder to coat onto the surface of tool steel using the flame spraying process. The coated surface microstructures were observed under a scanning electron microscope (SEM), x-ray diffraction (XRD), and the energy dispersive spectroscopy (EDS) was used for the phase characterization and identification. The wear rate of coated steels was determined using the Ogoshi machine, and the Vickers hardness method used to measure their microhardness. The effects of CNT on the microstructure of the coated material and the surface mechanical properties were investigated. The results showed that the mixture powder preparation using an ultrasonic method in SDS solution and the ball-milling process was suitable to disperse the CNT on the surface of WC feed powders due to produce an adequate relationship between CNT' and WC powders increasing the surface mechanical properties of coatings. The wear resistance of the coated material produce using the mixture of WC powder with 0.35 wt% CNT increased around 50% higher than the WC coated steel without CNT addition. Also, the hardness of coating reinforced CNT increased significantly compared with the hardness of WC coated and the steel substrates. Microhardness value from the base metal to the WC-CNT coated steel increased from 550 HV to 1717 HV and also the wear rate from the base metal to the WC-CNT coated steel decreased from 0.86 mm3/min to 0.017 mm3/min. These results indicate that CNT is an excellent alternative to improve the surface mechanical properties of WC coatings.

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Section: Experiments Results and Discussionmentioning

confidence: 99%

Surface Mechanical Properties of Tool Steel on the Addition of Carbon Nanotubes with the Process of Flame Spray Tungsten Carbide Coatings

Mudiantoro

Gerry

Winarto³

et al. 2020

MSF

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“…These features depend, among others, on the properties and surface structures that are obtained as a result of the manufacturing process [1,2,3]. The surface structure also affects the useful properties such as wear and fatigue strength [4,5,6,7,8]. Obtaining an appropriate surface structure is usually associated with applying additional machining operations.…”

Section: Introductionmentioning

confidence: 99%

Surface Texture Analysis of Hardened Shafts after Ceramic Ball Burnishing

2019

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This article represents the results of testing the surface condition of shafts manufactured by the burnishing process. The shafts with a hardness of approximately 62 HRC (Rockwell C). were burnished with a ceramic ball (Si3N4), where the force range was controlled by the means of a hydraulic system. The machining process consisted of hard turning shafts with cubic boron nitride (CBN) inserts, followed by burnishing with the use of various machining parameters, such as feed and force. The research focused on the examination of burnished surfaces, which was conducted for various structures after hard turning, and with variable burnishing parameters. The results obtained for the decrease of roughness are presented as the relation between the parameters Rat/Rab, which is approximately 2, while for Rpkt/Rpkb, it is around 3.7, respectively. Sat/Sab is around 2, while Spkt/Spkb is around 3.5 (where an index denotes the t-surface after turning, and the index b-surface after burnishing). The structure of the surface after burnishing and turning is described with roughness parameters, as well as with the photographs of the specimen surface, and the bearing area curve.

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“…Spherical tungsten carbide-cobalt (WC-Co) powder is mainly used for WC particle reinforced Co coating on the metal surface by thermal spray [21,22]. The structure of WC-Co powder is a kind porous particle consist of small WC wear-resisting particles and Co binder, the porous structure will help Co binder fuse homogeneous in whole particle during thermal spray.…”

Section: Introductionmentioning

confidence: 99%

En Wear-Resisting Properties of Epoxy/WC-Co/Al Coating on 300M Steel

Ding

Zhang

et al. 2019

AMR

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Based on surface protection problems of the steel part of the landing gear, wear-resisting properties of tungsten carbide-cobalt (WC-Co) particles reinforced epoxy (WRE) coatings were investigated in this paper. The curing process of WRE coating was analyzed by DSC, TG and IR. The wear performance under different rotational speed WRE coating was studied respectively. The specific wear rates of the WRE coating at 560 rpm and 840 rpm are 6.04 ×10−4mm3N−1m−1and 9.55 ×10−4mm3N−1m−1respectively, about only 60% of that of the uncoated sample. Thus, this could be summarized that WRE coating had a good wear resistance.

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Thermally sprayed finestructured WC-12Co coatings finished by ball burnishing and grinding as an innovative approach to protect forming tools against wear

Cited by 30 publications

References 9 publications

Surface Mechanical Properties of Tool Steel on the Addition of Carbon Nanotubes with the Process of Flame Spray Tungsten Carbide Coatings

Surface Mechanical Properties of Tool Steel on the Addition of Carbon Nanotubes with the Process of Flame Spray Tungsten Carbide Coatings

Surface Texture Analysis of Hardened Shafts after Ceramic Ball Burnishing

En Wear-Resisting Properties of Epoxy/WC-Co/Al Coating on 300M Steel

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