Alscan Casting 2012 [VERIFIED]
Alscan Casting 2012 >> https://bytlly.com/2tb7W4
After the castings were cooled to room temperature, uniaxial style strain gages were attached to the test casting and control casting, and the data were collected in real time using Strain Smart. The samples were sectioned using a band saw, and the gage locations on the test casting were compared to those on the control casting.
A cylinder hole was manufactured on a test plate using a numerical control (NC) machine. The hole was machined in a square shape with a depth of 100 mm. The hole was machined with a diameter of 70 mm and spaced 100 mm from the edge of the plate. A hole was machined in the same plate to serve as a control casting that would be used to compare the residual stresses as a function of time and temperature with those that occurred during the casting process. A hole was also located at a distance of 1.0 m from the center of the plate to serve as a control cast. The hole was machined to a depth of 15 mm and a diameter of 70 mm to be used as an internal control casting to compare the residual stresses as a function of time and temperature with those that occurred during the casting process. The test samples were made using 100-mm diameter aluminum-alloy cylinder dies. The castings were machined to the same geometrical tolerance as the other production castings. The resultant residual stresses and residuals in the cast cylinder hole were measured using the same strain gages that were used for the castings.
The heat treatment of the castings was conducted by induction heating the die to a temperature of 580 °C for 100 minutes. The die was then removed from the induction furnace, and the applied residual stress was recorded. Cooling of the castings was conducted in water or air. The cooling process was monitored by a thermocouple and recorded on a computer.
The cooling rate was calculated by taking the regression line for each sample, and the average rate of cooling for each sample was then calculated by multiplying the cooling rate by the cooling time. The cooling rates were 0.15 °C/min for the test cylinder hole and 0.12 °C/min for the control cylinder hole. The control casting was quenched in air after the heat treatment, and the casting was then removed from the water. The cooling rate of this air-quenched cylinder was 0.01 °C/min.
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