EFFECT OF THERMOCHEMICAL TREATMENT ON THE STRUCTURE, HARDNESS AND WEAR BEHAVIOR OF ELECTROLSS NI-P COATED 4140 STEEL

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ZANGENEH MADAR K.; MONIR VAGHEFI S.M.

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Journal: ESTEGHLAL Year:2005 | Volume:23 | Issue:2 Page(s): 185-196

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Information Journal Paper

Title

EFFECT OF THERMOCHEMICAL TREATMENT ON THE STRUCTURE, HARDNESS AND WEAR BEHAVIOR OF ELECTROLSS NI-P COATED 4140 STEEL

Author(s)

ZANGENEH MADAR K. | MONIR VAGHEFI S.M. | Issue Writer Certificate

Keywords

THERMOCHEMICAL TREATMENTQ4

THIN NI-P COATINGQ4

WEAR BEHAVIORQ2

DIFFUSION ZONEQ4

Abstract

In the present research, THERMOCHEMICAL TREATMENT in H2/NH3 atmosphere was used as a post-treatment for electroless Ni-P coatings on the AISI 4140 steel substrates. The high phosphorus (9%) coatings with thicknesses of 2, 24 and 48 µm were applied and the effect of the THERMOCHEMICAL TREATMENT on the morphology, structural changes, roughness, hardness and wear resistance of coatings were studied by SEM, EDS, XRD, profilometry, and microhardness tester. Wear test was used to evaluate wear characteristics of coatings. The wear behaviour of the thermochemical treated/Ni-P coated samples was assessed by comparison with thermochemical treated/uncoated (nitrided) samples. The results showed that effect of THERMOCHEMICAL TREATMENT varies with the coating thickness. In addition, it was shown that a multicomponent coating containing phosphide, nitride and intermetallic phases as well as diffusion region can be developed in the thin (2 µm) electroless Ni-P coated steel by THERMOCHEMICAL TREATMENT. This sample showed better wear resistance than 24 µm Ni-P coated steel under higher load. This behavior was ascribed to nitride phases formed at the surface as well as a nitrogen DIFFUSION ZONE at the subsurface of thin Ni-P coated steel.

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APA: Copy

ZANGENEH MADAR, K., & MONIR VAGHEFI, S.M.. (2005). EFFECT OF THERMOCHEMICAL TREATMENT ON THE STRUCTURE, HARDNESS AND WEAR BEHAVIOR OF ELECTROLSS NI-P COATED 4140 STEEL. ESTEGHLAL, 23(2), 185-196. SID. https://sid.ir/paper/5956/en

Vancouver: Copy

ZANGENEH MADAR K., MONIR VAGHEFI S.M.. EFFECT OF THERMOCHEMICAL TREATMENT ON THE STRUCTURE, HARDNESS AND WEAR BEHAVIOR OF ELECTROLSS NI-P COATED 4140 STEEL. ESTEGHLAL[Internet]. 2005;23(2):185-196. Available from: https://sid.ir/paper/5956/en

IEEE: Copy

K. ZANGENEH MADAR, and S.M. MONIR VAGHEFI, “EFFECT OF THERMOCHEMICAL TREATMENT ON THE STRUCTURE, HARDNESS AND WEAR BEHAVIOR OF ELECTROLSS NI-P COATED 4140 STEEL,” ESTEGHLAL, vol. 23, no. 2, pp. 185–196, 2005, [Online]. Available: https://sid.ir/paper/5956/en

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