منابع مشابه
Ultrasonic Testing of Steel Castings
Calibration and Reference Blocks ................................................................. 7 Longitudinal Wave Probes ............................................................................. 7 Transverse Wave Probes ............................................................................. 10 Measurement of Steel Thickness ...........................................................
متن کاملModelling of Equiaxed Microstructure in Castings
The paper deals with a numerical modelling of equiaxed microstructure formation during the solidification of two-component alloys. The basic enthalpy formulation was applied to model the solidification. The equiaxed grain size was dependent on the average cooling velocity at the moment when the liquid metal reaches the liquidus temperature. The experimentally determined dependence between grain...
متن کاملRough Sets Applied to the RoughCast System for Steel Castings
Rough logic and rough sets theory are mainly devoted to analysis of incomplete, uncertain, and inconsistent data. An exploited in the article result of the theory is the so-called rough information system that gives a model for dealing with the situation in which some real objects are represented ambiguously via defined approximation (alternatives of values of the objects attributes). The propo...
متن کاملMicrostructure and physical properties of alloys for partial denture castings.
Changes in the properties of cobalt-base alloys have been investigated from many points of view,1-4 but basic reasons for these changes have not been considered in any depth. Many variables are involved, and the relationships between the variables are closely interconnected. Some of the variables that have been studied are casting technicsj4 amounts of elements present,5'6 and investments used....
متن کاملDevelopment of a Hot Tear Indicator for Steel Castings
A hot tear indicator based on the physics of solidification and deformation is presented. This indicator is derived using available data from computer simulation of solidification and solid deformation. Hot tears form when the mushy zone is starved of liquid feeding and deformed in tension. The unfed tensile deformation causes a small additional porosity. A physical model based on a mass balanc...
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ژورنال
عنوان ژورنال: Journal of Industrial & Engineering Chemistry
سال: 1913
ISSN: 0095-9014,1943-2968
DOI: 10.1021/ie50057a003