A review of two-body abrasive wear

Moore, M.A.

doi:10.1016/0043-1648(74)90080-5

Cited by 104 publications

(60 citation statements)

References 30 publications

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“…Coalescence of these cracks produces small metallic pieces as debris. 1) Fine and distributed second phase hard particles would resist the abrasion of soft eutectic matrix. However, these hard particles would be effective only if these particle themselves are not removed/cut/deformed by comparatively abrasive particles.…”

Section: Discussionmentioning

confidence: 99%

“…Variety materials are commercially available for use as coating materials to improve the surface properties such as cermets, stellite and nickel alloys with or without hard carbide particles (CrC, WC etc.). 1,2) Ni-Cr alloy coatings are extensively used for wear resistance application in order to increase the working life of tribological components subjected to abrasion combined with corrosive wear conditions. These alloys are frequently hardened using micro-constituents such as CrC, CrB and nickel silicides.…”

Section: Introductionmentioning

confidence: 99%

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Investigations on the Abrasive Wear Behaviour of Flame Sprayed Ni–Cr–Co–Si Alloy Coating Deposited on Mild Steel Substrate

2006

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In present paper the influence of the post spray heat treatment on microstructure, microhardness and abrasive wear behaviour of flame sprayed Ni-Cr alloy (EWAC 1004) coatings deposited on mild steel has been reported. Coatings were deposited by oxy-acetylene flame spraying torch. The post spray heat treatment of the coatings was done at 800°C for 2 h. Wear behaviour of coatings was evaluated using pin on disc wear system against 120 and 600 grades SiC abrasive medium at 5 N, 10 N, 15 N and 20 N normal load. Results showed that the influence of normal load on wear rate is governed by the microstructure, hardness and abrasive grit size. Heat treatment increased average microhardness of the coating. Heat treatment of these coatings deteriorated the abrasive wear resistance against both fine and coarse abrasive mediums. In general, increase of normal load increased the wear rate. SEM study showed that wear is largely taken place by plowing, micro-cutting and crater formation mechanisms.KEY WORDS: Ni-Cr coating; flame thermal spraying; mild steel; abrasive wear; post spray heat treatment; microhardness and microstructure.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Investigations on the Abrasive Wear Behaviour of Flame Sprayed Ni–Cr–Co–Si Alloy Coating Deposited on Mild Steel Substrate

2006

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“…These precipitates were associated with a precipitate-free zone as pointed out by the arrow in the figure. An analysis of the elements present in these precipitates using the energy dispersive x-ray analysis unit showed that they were rich in V, W 9 and Mo. The possible influence of these precipitates on the fracture behavior will be discussed in a following section.…”

Section: Secondary Hardening_marte_n_s_ijti_c Steels (Seriesmentioning

confidence: 99%

“…Optical micrographs of the steels Bl, B4 9 and B5 are presented in Figure 42(a), (b), and (c), respectively, for the 900°C austenitizing treatment.…”

Section: Secondary Hardening_marte_n_s_ijti_c Steels (Seriesmentioning

confidence: 99%

Wear resistant alloys for coal handling equipment. Progress report, January 1--September 30, 1977

Bhat¹,

Zackay²,

Parker³

1977

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“…These types of investigations are concerned with the condition of the metal or ceramic material used as grinding media or the state of the metal device in which the grinding process is taking place (e.g. ball, AG and SAG mills) (Moore, 1974, Spero et al, 1991, Radziszewski et al, 2005. Since the grinding media (steel balls) and steel liners contribute significantly to a mineral processing plant's operating costs, it seems prudent that much research is done to study the abrasive behaviour of the rock particles and how to minimise the impact of it.…”

Section: Investigations Into Superficial Breakagementioning

confidence: 99%

Developing an abrasion characterisation test for measuring superficial breakage in comminution

Masuret¹

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Three motivations were presented for conducting this research. Firstly, comminution is primarily concerned with breaking of rocks therefore it is imperative to fully understand the breakage mechanisms involved in size reduction processes to be able to develop reliable and predictive models and consequently facilitate process optimisation. Impact breakage has been investigated extensively in literature as well as at the Julius Kruttschnitt Mineral Research Centre (JKMRC).However, surface breakage is poorly understood despite the fact it contributes significantly to new surface area generation in grinding.Another motivation for conducting this research was a contribution to the Unified Comminution Model (UCM). The UCM is a mechanistic model framework, and thus requires, as fundamental inputs, the response of a rock particle to the common modes of breakage found in comminution, independent of each other. Hence, this research aimed to isolate the abrasion mechanism with an appropriate device and to develop an abrasion characterisation test for measuring superficial breakage in comminution. This was because most of the prior comminution experiments investigating abrasion were conducted in tumbling mills which neither isolated the mechanism nor eliminated secondary breakage.Lastly, Leung (1987) reported that low specific energy impact events can produce similar product size distributions to that of abrasion. But, the abrasion experiments were conducted in a tumbling mill. Hence, the possibility of substituting low energy impact breakage for shear abrasion breakage was investigated as well. Abrasion tests and impact tests were conducted over a range of energies with the same ore type and the results were compared.Surface breakage experiments were conducted with single ore particles and particle beds. The single particle tests included a novel use of the Steel Wheel Abrasion Tester (SWAT) device as well as single impact tests with the JK Rotary Breakage Tester (JKRBT). Batch (bed) experiments were conducted on the bench scale with a planetary mill and the results compared with the single particle outcomes. A novel methodology was followed to produce the results which included the application of an insert to minimise secondary breakage.The results showed that despite the fact that energy directly contributed to the production of product mass during abrasion, the primary driver of mass loss in ore particles was the applied load. It was found that the mass loss rate (g/kJ) was directly proportional to the applied load during the steady state phase of the rock's response to the abrasion mechanism. This introduced the possibility of establishing an abrasion index for rock particles.iii The findings also revealed that, at face value, neither low nor high energy, single point, single impact breakage produced appearance functions similar to that of abrasion. Therefore, single impact breakage mechanisms cannot be used as a proxy for abrasion breakage mechanism, at least not for the energy range in which the experiments ...

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A review of two-body abrasive wear

Cited by 104 publications

References 30 publications

Investigations on the Abrasive Wear Behaviour of Flame Sprayed Ni–Cr–Co–Si Alloy Coating Deposited on Mild Steel Substrate

Investigations on the Abrasive Wear Behaviour of Flame Sprayed Ni–Cr–Co–Si Alloy Coating Deposited on Mild Steel Substrate

Wear resistant alloys for coal handling equipment. Progress report, January 1--September 30, 1977

Developing an abrasion characterisation test for measuring superficial breakage in comminution

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