20-10-2011, 03:13 PM
Abstract:
The exact pattern of residual stresses will depend on the heat treatment temperatures
employed, the depth of hardening and the type of quenchant. Process conditions that give rise to
compressive residual stresses on the surface of heat-treated components are favourable. This type of
residual stress delays the initiation of fatigue cracking in service, which typically occurs on the surface
of the part under the action of cyclic tensile stresses. The last phase in the manufacturing of crankshafts
is nish grinding in order to achieve the desirable condition of the surface and the subsurface layer,
i.e. suitable dimensions, suitable surface roughness and the corresponding distribution of relative
grinding residual stress in the subsurface have to be ensured. By correct selection of the grinding
wheel and grinding conditions, taking into account the physical and mechanical properties of the
workpiece material, the very favourable compressive residual stresses in the hardened surface layer
will be retained after grinding.
read more on
http://pid.sagepubcontent/217/3/173.full.pdf
The exact pattern of residual stresses will depend on the heat treatment temperatures
employed, the depth of hardening and the type of quenchant. Process conditions that give rise to
compressive residual stresses on the surface of heat-treated components are favourable. This type of
residual stress delays the initiation of fatigue cracking in service, which typically occurs on the surface
of the part under the action of cyclic tensile stresses. The last phase in the manufacturing of crankshafts
is nish grinding in order to achieve the desirable condition of the surface and the subsurface layer,
i.e. suitable dimensions, suitable surface roughness and the corresponding distribution of relative
grinding residual stress in the subsurface have to be ensured. By correct selection of the grinding
wheel and grinding conditions, taking into account the physical and mechanical properties of the
workpiece material, the very favourable compressive residual stresses in the hardened surface layer
will be retained after grinding.
read more on
http://pid.sagepubcontent/217/3/173.full.pdf