Study on Hardfaced Wear Resistant Bronze Alloy

Voiculescu, Ionelia; Geantă, Victor; Ştefănoiu, Radu; Binchiciu, Horia; Simiti, I. Vida; Jumate, Nicolaie; Vasiu, Radu

doi:10.1002/9783527628513.ch79

Cited by 7 publications

(3 citation statements)

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“…1 Loading blade with frontal wear Tries to recondition through welding, affected areas, highlighted major difficulties, namely the lack of compatibility at welding of the base material (BM) with addition material (AM) and the softening of the heat affected zones (HAZ), this reduces, drastically, wear resistance. The repetitive maintenance concept provides repetitive equipping of the active surfaces with intelligent protection and self-protection systems to wear [1,2,3,4].…”

Section: Introductionmentioning

confidence: 99%

Aspects Regarding Repetitive Maintenance Concept in Push Blades for Loading Equipment

Tanasache

Florea

Iovanas

et al. 2017

MSF

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Preventive repeated maintenance concept provides elaborating, developing and reconditioning, repeatedly, in economic efficient conditions, of the pushing blades that equip bulk loading machines, namely leveling them. Applying the solution implies developing and elaborating active areas in direct contact with processed materials by loading through welding. To this end the base material of the blades is chosen to comply with the addition material afferent to the selected process, for predetermined circle tries, approx. 5 in the present moment.Research conducted to validate the loading through welding technology had primary objectives to obtain material couples base/addition that have a high resistance to intense bending demands, under load, combined with a good abrasion usage resistance or high pressure. The chemical composition of the basic materials in the pushing blades, is afferent to high resistance steels, with a maximum of1.6%Mn, max. 1.5%Cr, max.2%Ni, max. 0.7%Mo and max. 0.005%B. The chemical composition of the deposited material, through welding, falls into steel prescription, type Fe-25%Cr-5%W-Nb-Ti-B, with metallographic structures that have a high content of complex carbides and hardness of minimum 60 HRC. Sclerometric tried and metallographic research of specific area of the deposited metal/base metal ensemble did not highlight any imperfections such as cracks or white sports in the thermal influenced areas.Research regarding exploitation behaviour, of basaltic aggregates in loading conditions or cereals, have shown a good resistance at wear.

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Section: Introductionmentioning

confidence: 99%

Aspects Regarding Repetitive Maintenance Concept in Push Blades for Loading Equipment

Tanasache

Florea

Iovanas

et al. 2017

MSF

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“…There are known electrodes for cladding by welding that deposit rich alloys in chromium carbides [1,2,3], resistant to abrasion under low pressure [4]. The size of the carbides and implicitly their fragility is significantly influenced by the alloying level of the deposits and by the welding parameters [5,6].…”

Section: Introductionmentioning

confidence: 99%

Nanostructured Materials for Cladding by Welding

Tihanov

Florea

Binchiciu

et al. 2014

AMR

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The rigorous stress conditions of active surfaces, from the components of magmatic rock processing equipment of surface pits, required finding new materials and system processes that achieve major impact on wear processes, in the sense of decreasing them. Conducted research with classic cladding by welding materials showed a high importance of the chromium carbides in the deposits, in the fight against wear. From manufacturing considerations, the participation of chromium carbides in the deposits made with traditional welding materials is 35%, which required finding new ways to obtain superior performances.The group of authors considered the nanostructure method to be convenient, hence of finishing the deposition structure, by introducing in the cladding by welding material composition centers of crystallization with colloidal size and superior temperatures, compared to the molten through welding bath temperatures. In order to achieve a new generation of cladding by welding materials, we proceeded to develop, on the above mentioned principle, rods that deposit by welding alloys like Fe-20%Cr-4%W-1%Ti, nanostructure with melted tungsten carbides and colloidal grinded. The rods thus obtained were used for cladding active surfaces of general purpose extraction and processing machines for basaltic rocks, to achieve highways.Results obtained confirm theoretical assumptions, which led to the implementation of new products in the industrial production.

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“…In order to develop the deposition technology and study the welded area's properties, weld beads were deposited with the experimental electrode on plates with the same base material (BM) as the dies [16,22].…”

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confidence: 99%

Lifetime Analysis of Dies Manufactured by Conventional Processes and Reconditioned by Deposition Welding Operation

Iovanas,

Dumitrascu

2024

Materials

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The refurbishment of dies by the deposition welding of wear areas is an efficient and economical process. The aim of this study was to conduct a comparative analysis of the lifetimes of different types of dies for the manufacturing of wagon wheels. The analyzed dies were manufactured by conventional processes (Type I) and reconditioned through a deposition welding procedure using a dedicated electrode (Type II). The Anderson–Darling test was conducted to analyze the goodness of fit of the lifetime data specific to the die types. The maximum likelihood estimation method (MLE) with a 95% confidence interval (CI) was applied in order to estimate the lifetime distribution parameters. It was found that the lifetimes of type II dies were longer than those of type I dies. The mean time to failure (MTTF) recorded for reconditioned dies was 426 min, while the mean time to failure of dies manufactured by conventional processes was approximatively 253 min. In addition, an accentuated hazard rate for type I dies compared to type II dies was observed. The results of this analysis emphasized the fact that dies can be restored to their initial operating capacity by successfully using deposition welding procedures that confer a high resistance to operational loads. At the same time, the use of these procedures allows for the sustainable development of resources and waste management.

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Study on Hardfaced Wear Resistant Bronze Alloy

Cited by 7 publications

References 0 publications

Aspects Regarding Repetitive Maintenance Concept in Push Blades for Loading Equipment

Aspects Regarding Repetitive Maintenance Concept in Push Blades for Loading Equipment

Nanostructured Materials for Cladding by Welding

Lifetime Analysis of Dies Manufactured by Conventional Processes and Reconditioned by Deposition Welding Operation

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