TY - JOUR
T1 - Low temperature plasma nitriding characteristics of precipitation hardening stainless steel
AU - Sun, Y
AU - Bell, Thomas
PY - 2003/10/1
Y1 - 2003/10/1
N2 - The low temperature plasma nitriding behaviour of 17-4PH type precipitation hardening stainless steel was investigated in the present work. The morphology, thickness, hardness and X-ray difraction characteristics of the nitrided layers produced at temperatures between 350degreesC and 450degreesC were studied It was found that, at temperatures lower than 425degreesC, a thin, hard nitrided layer exhibiting a 'white' and featureless morphology could be produced on the steel investigated X-ray diffraction analysis revealed that this layer was X-raj; amorphous, as derived from its lack of Bragg reflection peaks in the diffraction pattern. At higher nitriding temperatures, chromium and iron nitrides began to form it? the nitrided layer, leading to a transition in nitriding kinetics and a decrease in hardness. The possible mechanisms relating to the formation of the amorphous-like nitrided layer at sufficiently low temperatures are discussed in terms of solid state fusion reaction for of the theory of solid state dif amorphous alloy formation.
AB - The low temperature plasma nitriding behaviour of 17-4PH type precipitation hardening stainless steel was investigated in the present work. The morphology, thickness, hardness and X-ray difraction characteristics of the nitrided layers produced at temperatures between 350degreesC and 450degreesC were studied It was found that, at temperatures lower than 425degreesC, a thin, hard nitrided layer exhibiting a 'white' and featureless morphology could be produced on the steel investigated X-ray diffraction analysis revealed that this layer was X-raj; amorphous, as derived from its lack of Bragg reflection peaks in the diffraction pattern. At higher nitriding temperatures, chromium and iron nitrides began to form it? the nitrided layer, leading to a transition in nitriding kinetics and a decrease in hardness. The possible mechanisms relating to the formation of the amorphous-like nitrided layer at sufficiently low temperatures are discussed in terms of solid state fusion reaction for of the theory of solid state dif amorphous alloy formation.
UR - http://www.scopus.com/inward/record.url?scp=0346432451&partnerID=8YFLogxK
U2 - 10.1179/026708403225007545
DO - 10.1179/026708403225007545
M3 - Article
VL - 19
SP - 331
EP - 336
JO - Surface Engineering
JF - Surface Engineering
IS - 5
ER -