Nanophase hardfaced coatings

Reisgen, Uwe; Stein, Lars; Balashov, B.; Geffers, Christoph

doi:10.1002/mawe.200800365

Cited by 4 publications

(4 citation statements)

References 6 publications

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“…Numerous carbide precipitates with empirical formula Cr 7 C 3 , Cr 23 C 6 and NbC were observed and detected in the samples. Despite a high amount of boron in the chemical composition of the welds XRD analyses failed to identify any appreciable amount of boron containing compounds.…”

Section: Discussionmentioning

confidence: 99%

“…7 Research aimed at determining wear resistance of the deposited layers and HARDOX 400 type steel was performed according to ASTM G 65-00, Procedure A [6]. Tests were carried out on samples of dimensions 70×25×10 [mm].…”

Section: B K D Struct Cosmentioning

confidence: 99%

“…The varying properties of nano-structured materials when compared to steel makes that the use of nanomaterials in welding technology brings new opportunities for their use. Nanomaterials are single or multi-phase polycrystals characterized by microstructural grain ranging in size from 1 to 250×10 -9 m [1][2][3][4][5][6][7]. At the upper end of this range, the term "ultra-fine particle size" (grain size of 250-1000 nm) is frequently used.…”

Section: Introductionmentioning

confidence: 99%

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Properties and Structure of Nanocrystalline Layers Obtained by Manual Metal Arc Welding (MMA)

Górka¹,

Czupryński²,

Adamiak³

2017

Archives of Metallurgy and Materials

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The present paper is the result of the investigations of the properties and structure of nanocrystalline layers deposited from iron-based nanoalloy on steel S355N substrate by manual metal arc welding method (MMA). In the process of welding a 100 A current intensity was used with desiccation preheating at 80°C while maintaining the interpass temperature at range of 200°C. The resultant deposit welds were subjected to macro and microscopic metallographic examination, X-ray phase analyses and crystallite size was analyzed by X-ray diffractometry (XRD), additionally EDX chemical composition analysis of precipitates during scanning electron microscopy was performed. Working properties of the obtained nanocrystalline deposit welds were evaluated based on hardness and metal-to-mineral abrasive wear. The results of the deposit welds working properties measurements were compared with the properties of wear resistant steel HARDOX 400 type used as the reference material.

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Section: Discussionmentioning

confidence: 99%

Section: B K D Struct Cosmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Properties and Structure of Nanocrystalline Layers Obtained by Manual Metal Arc Welding (MMA)

Górka¹,

Czupryński²,

Adamiak³

2017

Archives of Metallurgy and Materials

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“…abrasion-resistant plates and tubes. The above-named group constitutes a new generation of abrasion-resistant materials, which, obtained in a highly complex production process, have found applications in the metallurgical, mining, and automotive industries as well as in foundries, sand excavation, waste disposal, power plants, and in the operation of machinery parts and equipment [12][13][14][15][16]. Abrasion-resistant plates are characterized by good weldability, toughness, and mechanical workability, thus offering the combination of high hardness with high resistance to mechanical loads.…”

Section: Introductionmentioning

confidence: 99%

Assessment of the quality of abrasion-resistant plates welded joint

Górka

2020

J min metall B Metall

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The article presents the analysis of the structure and properties of joints made of abrasion-resistant plates having the structure of chromium cast iron and welded with filler metals, the use of which aimed to provide the high abrasion resistance of the surface layer and good mechanical properties of the base material. The face layer of the joint was made using the MMA (Manual Metal Arc) welding method and the Fe-Cr-Nb-B type nanocrystalline filler metal. The root weld was welded using an austenitic filler metal, whereas the filling layer was welded using the MAG method with a low-alloy filler metal. The joints were subjected to non-destructive tests (visual tests and penetrant tests) as well as to mechanical properties tests. The research involved macro and microscopic metallographic tests, the determination of the grain size using an Xpert PRO X-ray diffractometer, and the EDS analysis of the chemical composition of the precipitates. The assessment of the operational properties of the joints based on hardness measurements, static tensile tests, bend tests as well as identifying the metal-mineral abrasive wear resistance were performed in accordance with ASTM G65 ? 04 standards. The results of the abrasion resistance tests were referred to the HARDOX 400 steel reference specimen. Considering the tests results it was concluded that the used filler materials can assure the appropriate operational properties of welded abrasion-resistant plates.

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Properties and Structure of Deposited Nanocrystalline Coatings in Relation to Selected Construction Materials Resistant to Abrasive Wear

et al. 2018

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Presented in this work are the properties and structure characteristics of MMA (Manual Metal Arc) deposited nanocrystalline coatings (Fe-Cr-Nb-B) applied to an iron nanoalloy matrix on an S355N steel substrate in relation to selected construction materials resistant to abrasive wear currently used in industry. The obtained overlay welds were subjected to macro and microscopic metallographic examinations; grain size was determined by X-ray diffraction (XRD), and chemical composition of precipitates was determined by energy-dispersive X-ray spectroscopy (EDS) during scanning electron microscopy (SEM). The size of the crystalline grains of the Fe-Cr-Nb-B nanocrystalline microstructure was analyzed using an Xpert PRO X-ray diffractometer. Analysis of the test results of the obtained layers of arc-welded Fe-Cr-Nb-B-type alloy confirmed that the obtained layers are made of crystallites with a size of 20 nm, which classifies these layers as nanocrystalline. The obtained nanocrystalline coatings were assessed by hardness and with the use of metal-mineral abrasion testing. The results of the coatings’ properties tests were compared to HARDOX 400 alloy steel.

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Nanophase hardfaced coatings

Cited by 4 publications

References 6 publications

Properties and Structure of Nanocrystalline Layers Obtained by Manual Metal Arc Welding (MMA)

Properties and Structure of Nanocrystalline Layers Obtained by Manual Metal Arc Welding (MMA)

Assessment of the quality of abrasion-resistant plates welded joint

Properties and Structure of Deposited Nanocrystalline Coatings in Relation to Selected Construction Materials Resistant to Abrasive Wear

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