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...
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...
Porosity casting defect refers to the defect caused by the bubbles left in the casting before the liquid metal solidifies completely in the mold. There are three main sources of gases in castings: metal melting process, mold and pouring process. The source of gas in the melting process is...
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...
Shrinkage and porosity defects are common defects in sand casting production. The main purpose of numerical simulation of temperature field in solidification process is to predict the possible shrinkage and porosity defects in sand casting, so as to control the internal quality of sand casting and optimize the sand...
There are many reasons for shrinkage and porosity casting defects in castings. Deficiencies in product structure, smelting process, core sand, process design and other aspects may lead to shrinkage and porosity casting defects. ① Product structure: the casting wall is thick and uneven, and the heat feeding is insufficient;...
The prediction of shrinkage defects in sand castings during solidification is mainly realized by using shrinkage defect criterion. Shrinkage porosity defects are generally related to the speed of solidification process, the size of section and alloy composition. When the shrinkage rate of each element is divided by the critical...
The complete production process of a casting product includes product design, process design, casting blank production, heat treatment and machining. If there is a problem in any stage, it may lead to the quality problem of the final steel casting, which requires quality control in the process. Process control...
The shrinkage porosity and shrinkage cavity defects in the production of Wet Mold clay sand steel castings are mainly related to the unreasonable process design, improper riser position and size, and the failure to place cold iron and quenched chrome ore in key parts. Shrinkage porosity and shrinkage cavity...