Evaluation of gas nitriding process with in-process variation of nitriding potential for AISI H13 tool steel

Akhtar, Syed Sohail; Arif, Abul Fazal M.; Yilbaş, Bekir Sami

doi:10.1007/s00170-009-2215-4

Cited by 57 publications

(22 citation statements)

References 12 publications

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“…Note that the absence of porosity results in decreased brittleness of the compound layer [5][6][7][8][9][10]. Thus these characteristics of nitrided blocks do not differ essentially to each other but at compound layer removal different density of porosity was found at both groups of blocks that resulted in different wear rates.…”

Section: Initial Microstructures and Xrd Of Samples And Applied Indusmentioning

confidence: 99%

“…Spots with the partially removed fragments as shown in Figure 5b revealed that the porosity in the compound layer is responsible for its degradation, since on the removed surfaces of block 2. Note that from the scientific literature [5][6][7][8][9][10] it is well known that porosity is a consequence of inappropriate nitriding parameters. Furthermore occurrence of the surface microand macro-cracking as well as the spots where comparatively small fragments were removed was observed.…”

Section: Wear Progress On Nitrided Blocks At Lower Contact Pressurementioning

confidence: 99%

“…Microstructure after nitriding as well as die design should be in each application adapted to actual loads that prevail on the die. It well known that nitrided microstructure of dies aimed for Al hot extrusion is very important at prolongation of die life [5][6][7][8][9][10]. Study of wear of tribological pair of soft and heated metal in contact with hard counter body is very demanding.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Wear progress of nitrided microstructures in tribological simulation of aluminium hot extrusion

Terčelj¹,

Peruš²,

Kugler³

2011

Surface Effects and Contact Mechanics X

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The study of wear of a tribological pair of soft and heated metals in contact with a hard counter body is very demanding. So far, less attention has been devoted to this problem and thus progress in this field is needed. In Al hot extrusion also the mentioned tribological system prevails but it is also supposed that various contact pressures between extruded Al die bearing surfaces takes place. In order to explain wear behaviour on die bearing surfaces wear tests of nitrided surfaces at low, medium and higher contact pressures using block on cylinder test equipment were carried out.

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Section: Initial Microstructures and Xrd Of Samples And Applied Indusmentioning

confidence: 99%

Section: Wear Progress On Nitrided Blocks At Lower Contact Pressurementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Wear progress of nitrided microstructures in tribological simulation of aluminium hot extrusion

Terčelj¹,

Peruš²,

Kugler³

2011

Surface Effects and Contact Mechanics X

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“…The sample is gas nitrided using two-stage nitriding process with controlled nitriding potential in collaboration with local extrusion setup [8]. The sample is gas nitrided using two-stage nitriding process with controlled nitriding potential in collaboration with local extrusion setup [8].…”

Section: Introductionmentioning

confidence: 99%

“…3 in-process variations of temperature (a) and nitriding potential, K" {b) during two-stage nitriding of AiSI H13 samples having different geometric profiies[8]. p h •fi'rrmtïTnTm-i*'i'Ti-mrt'invni nvi'i 110 m m Í20 ísom m m m m m m mr mi $n Tin» (minutes) m ris 7S7 Fig.…”

mentioning

confidence: 99%

Effect of Profile Corners on the Nitriding Treatment of AISI H13 Hot Extrusion Dies

Akhtar

Arif

2014

Journal of Manufacturing Science and Engineering

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One of the utmost challenges of hot aluminum extrusion is to design the die cavities with sharp corners (used to extrude thin-walled profiles) by considering the effective nitriding suiface treatment of the die hearing surface in terms of nitride layer uniformity. In the present study, various AISI HJ3 steel samples (having commonly used profile geometric features) are manufactured using wire electro-discharge machining (EDM) and subsequently nitrided using two-stage controlled nitriding treatment. As a special case, corner features are investigated in terms of compound and nitride layers formation using optical and scanning electron microscopes. Finite element (FE) code ABAQUS is used to simulate the nitriding process using mass diffusion analysis in line with experimental set up. Both experimental and numerical results are found in close agreement in terms of nitrogen concentration and corresponding microhardness profiles. Some design modifications are implemented in FE code for corner profile features for uniform nitride layer development.In view of the current results, some design guidelines are suggested for effective and uniform nitride layer formation in order to secure high quality extruded product and extended die life.

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Improving Microstructure of AISI H13 Extruding Dies Using Ion Nitriding

Montalvo¹,

Velasco

Canales³

2012

Light Metals 2012

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Evaluation of gas nitriding process with in-process variation of nitriding potential for AISI H13 tool steel

Cited by 57 publications

References 12 publications

Wear progress of nitrided microstructures in tribological simulation of aluminium hot extrusion

Wear progress of nitrided microstructures in tribological simulation of aluminium hot extrusion

Effect of Profile Corners on the Nitriding Treatment of AISI H13 Hot Extrusion Dies

Improving Microstructure of AISI H13 Extruding Dies Using Ion Nitriding

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