The significance of hardness

Angus, H.T.

doi:10.1016/0043-1648(79)90046-2

Cited by 32 publications

(7 citation statements)

References 12 publications

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“…Increasing wear resistance after the initial wear period is due to the result of work hardening. Work hardening during cold deformation leads to an increase in hardness, and this results in increasing of wear resistance (Angus, 1979). Different wires were used to investigate the effect of wear resistance of the weld metal.…”

Section: Resultsmentioning

confidence: 99%

Abrasive wear behaviour of concussor jaws welded using a gas metal arc welding process

Kıratlı

2005

Industrial Lubrication and Tribology

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Purpose -The aim of the research is to investigate the influence of gas metal arc welding on the wear performance of worn concussor jaws. Design/methodology/approach -Worn parts were welded using the gas metal arc welding process. Various wires were used for this purpose. These welded parts were subjected to wear tests under different loads, and changes in the hardness and microstructures were examined. A pin-on-disc wear test apparatus was used. Findings -As a result of this study, the following findings are reported: wear rates were significantly increased with the increasing of load and wear distance; the hardness of the weld metal of the welded specimens changed depending upon the chemical composition of the weld wire; with the increasing carbon, manganese and chromium in the weld wire, wear resistance increased; in the present study, specimens B and C showed better wear resistance; therefore these specimens are suitable for using in concussor jaws. Research limitations/implications -Electrodes were limited with four wires, for welding gas arc welding methods were applied, loads were limited with 10, 25, 40 N, welded parts were subjected to wear test, hardness test, microstructures were examined. Practical implications -For future work, instead of buying worn concussor jaws, they are repaired with the gas metal arc welding process using various weld wires. By this process, working life of the jaws can be extended and vast economical benefit may also be obtained. Originality/value -This paper fulfils an identified information need and offers practical help to the industrial firms working with alunit ore and rock crasher and also to the academicians working on wear of materials.

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Section: Resultsmentioning

confidence: 99%

Abrasive wear behaviour of concussor jaws welded using a gas metal arc welding process

Kıratlı

2005

Industrial Lubrication and Tribology

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“…However, in all the samples, this increment was more at the beginning of wear operation (first 360 m), which is because wear strength increased after 360 m and because of cold strain hardening of the samples during wear. Strain hardening in the material during cold deformation caused an increase in material hardness, and this increment in hardness made improvement in wear strength (Angus, 1979;Kahraman and Gü lenç, 2002). Deformation is named as cold up to 4008C.…”

Section: Wear Test Resultsmentioning

confidence: 99%

Research on wear characteristics of AISI 1035 steel boronized at various parameters

Kıratlı

Fındık

2011

Industrial Lubrication and Tribology

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Purpose -This paper aims to research the tribological features of AISI 1035 steel, boronized at various parameters. Design/methodology/approach -The samples were boronized via box boronizing method. By using Ekabor 2 powders, boronizing was conducted at 840, 880, 920, 960 and 1,0008C for two, four and six hours. Wear resistance of boronized samples at determined parameters were analysed. Wear experiments were conducted under 40 N constant load at pin-on-disk experiment setup. Also, microstructures and microhardness values of boronized samples were analysed to determine the most suitable boronizing parameters against wearing. Findings -As a result of this study, the following findings are reported: it was determined as the temperature increased, the thicker the boride layer obtained during the boronizing. In the case of longer boronizing time, the distinct columnar structure was clearer. Whenever applying higher temperature and longer boronizing time, wear decreased and hardness values increased. It was also determined that when boronizing was conducted at 900 and 1,0008C for at least four to six hours, better results were obtained. Furthermore, the increment in the boronizing temperature and longer duration caused an increase in hardness from the surface to inwards and thus a decrease in wear ratio. Research limitations/implications -In the present study, only 40 N is used for a wear load and that is the limitation of the research. Practical implications -Boronizing of the parts using 900 and 1,0008C temperature and four to six hours time, the better results can be obtained. Wear resistance can be improved in the determined temperature interval for boronizing process. Therefore, the industrial firms can be gained huge economical profits. Originality/value -The outcome of the study will be beneficial for the academicians and industrial firms working on wear process. The service life of the steel parts can be extended via boronizing of steels working on quarries.

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“…The crystalline structure and boundaries were determined by transmission electron microscopy (TEM, JEM-F200, JEOL, Japan, at 200 kV). The hardness (H V ) of B 4 C-CrB 2 composites was measured by a Vickers micro-hardness tester (430SVD, Wolpert, USA) at a load of 9.8 N for 15 s and calculated by the following equation 26 :…”

Section: Methodsmentioning

confidence: 99%

Mechanical properties of B₄C–CrB₂ binary eutectic composites prepared by arc‐melting

Jia

et al. 2023

Int J Applied Ceramic Tech

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B 4 C-CrB 2 composites were prepared by arc-melting using B 4 C and CrB 2 powders as raw materials. The eutectic composition of B 4 C-CrB 2 system was 30B 4 C-70CrB 2 (mol%) with a labyrinth-like irregularly layered eutectic microstructure, composed of B 4 C phase about 1-2 μm in thickness dispersing in CrB 2 matrix, much smaller than raw powders. The interface of the eutectic composite was well bonded, and there were edge dislocations at the interface to alleviate the interface mismatch. The eutectic temperature of B 4 C-CrB 2 composites was approximately 2200 K. At the eutectic composition, the B 4 C-CrB 2 composites showed the maximum Vickers hardness (24.6 GPa) and fracture toughness (4.3 MPa m 1/2 ) at room temperature.

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The significance of hardness

Cited by 32 publications

References 12 publications

Abrasive wear behaviour of concussor jaws welded using a gas metal arc welding process

Abrasive wear behaviour of concussor jaws welded using a gas metal arc welding process

Research on wear characteristics of AISI 1035 steel boronized at various parameters

Mechanical properties of B₄C–CrB₂ binary eutectic composites prepared by arc‐melting

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The significance of hardness

Cited by 32 publications

References 12 publications

Abrasive wear behaviour of concussor jaws welded using a gas metal arc welding process

Abrasive wear behaviour of concussor jaws welded using a gas metal arc welding process

Research on wear characteristics of AISI 1035 steel boronized at various parameters

Mechanical properties of B4C–CrB2 binary eutectic composites prepared by arc‐melting

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Product

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Mechanical properties of B₄C–CrB₂ binary eutectic composites prepared by arc‐melting