By analyzing and mastering the proportional solidification technology of nodular cast iron into the cylinder, the cooling rate is changed […]
Shrinkage cavity and shrinkage porosity are common internal casting defects in heavy position of ductile iron castings. The shrinkage cavity
In this experiment, the method of controlling variables is adopted. The mold temperature is set as 230 ° C, 140
Shrinkage porosity defect is the key research object of this project. The observation method for this defect is fluorescence penetration
In this test, the control variable method is adopted, and the material handle thickness is set as 16mm, 31mm, 42mm
In this test, the method of variable control was adopted. Under the condition of other parameters unchanged, the boosting pressure
In the defect analysis of semi-solid thick wall products, shrinkage cavity and porosity are the typical defects studied. In the
Inoculation treatment: inoculation treatment of nodular cast iron can improve the roundness of graphite ball, improve the spheroidization rate, and
The causes of shrinkage cavity and porosity of nodular cast iron are complex. The main factors affecting primary shrinkage, volume
The solidification process of ductile iron castings is generally a process of shrinkage, expansion and re shrinkage. Although the precipitation
In the high temperature compression test of Al Si based casting materials, the samples have compression deformation under different temperature
Shrinkage is the physical nature of the alloy. Under normal pouring temperature, the shrinkage volume of the alloy with fixed
The effect of mold conditions on the shrinkage tendency of castings is mainly due to mold wall expansion. On the
The effect of phosphorus on the shrinkage defects of castings is shown in two aspects: one is that phosphorus, as
For many foundries whose production mode is from cupola to induction furnace, there is also a running in process for
The composition control of molten iron plays a very important role in the process design of casting anti shrinkage. Zhang
Although the anti shrinkage factor is a factor that must be considered in the casting process, recently, with the market
This type of beam is one of the main parts of a large machine tool. The quality of the casting
Ingot mold is a kind of necessary ingot equipment used in mold casting production in steel plant. Although its shape
At present, there are many researches on the influence of metallurgical and molding factors on shrinkage cavity and porosity of
For the same alloy, whether the hub cracks or not often depends on the hub structure, process parameters and mold
Casting porosity This is a small cavity formed by the gas which can not escape during the solidification of metal.
Features: in the thick section of the casting, hot spot or axis and other places of the final solidification, rough
The structure of cylinder block (cylinder head) casting is complex, and the wall thickness is quite different. The thick and
The shrinkage porosity and porosity are more common in ductile iron than in ordinary gray iron. To prevent them, more
1.Porosity Casting defect characteristics Inside, on or near the surface of the casting, there are smooth holes with different sizes,
