Figure 1 shows the flange bonnet casting with blocked feeding channel. There are shrinkage defects at A and B of the casting, and a large number of shrinkage defects at C after processing; Figure 2 shows the improved process plan. Aluminum silicate is used for thermal insulation at position...
Figure 1 shows the location of shrinkage porosity in a casting. See Figure 2 for the process plan before improvement. After pouring, overheating occurred at positions 1, 2 and 3 in Figure 1, and the casting shrinkage defects were serious. See Figure 3 for the improved process plan. The...
As shown in the figure, the shrinkage cavity distribution with volume fraction greater than 0.05 predicted by numerical simulation technology under the original process scheme of gearbox box is shown. Taking the maximum shrinkage rate and the total shrinkage amount as the standard, the analysis and simulation results can...
By individually adjusting the corresponding parameters of the example, we can intuitively understand the influence of these conditions on the accuracy of the judgment results of shrinkage cavity and porosity of nodular iron. 1) Comparison with uncoupled micro Set the micro switch to 0 (off) and 1 (on) respectively....
Graphite expansion will occur in the solidification process of iron castings. While the liquid metal shrinks, the graphite expansion in the mold can play the role of feeding. How about the effect of this expansion and feeding? We can simulate it in two ways with ProCAST. The first is...
The main function of the casting process numerical simulation software is to simulate and predict the formation of shrinkage porosity and shrinkage cavity casting defects, which has achieved the function of controlling the internal quality of castings. At present, the commonly used numerical simulation software of casting process in...
1.First process improvement and verification tracking (1) Change to bottom pouring system. The layout of the ingate of the casting should avoid the original thick position to reduce the risk of overheating at the ingate position. Change the original middle pouring system into the bottom pouring system, modify the...
After sampling the casting defect location, the scanning electron microscope was used for analysis. After ultrasonic cleaning, the casting defect was observed and analyzed by electron microscope (as shown in the figure). It was determined that the casting defect was a shrinkage casting defect. The basic reason for the...
The cylinder head of a certain type of diesel engine produced by ZHY Casting factory has complex structure, compact layout, poor casting process and many hole casting defects in production. This paper analyzes the shrinkage defects of the cylinder head of a diesel engine, and puts forward solutions. The...
Due to the liquid shrinkage and solid shrinkage of liquid metal during solidification, the holes formed at the last solidification part of the casting can not be supplemented by external liquid metal in time, so shrinkage cavity and shrinkage porosity casting defects are formed. Among them, those with concentrated...