Application prospect of high Si nodular cast iron
Table 1 shows the impact absorption energy of nodular cast iron V-notch samples at different ambient temperatures. The samples are […]
Table 1 shows the impact absorption energy of nodular cast iron V-notch samples at different ambient temperatures. The samples are […]
1. Advantages Referring to the Research Report of zhangboming et al. And in combination with the analysis and research of
1. Chemical composition detection Arl3460 direct reading spectrometer is used for chemical composition detection, and the chemical composition detection results
1. Molding sand properties In order to ensure good surface quality of castings, the performance of green molding clay sand
1. Layout design Disa230b vertical parting boxless injection molding machine is adopted, and the size of molding machine plate is
With the rapid development of the automotive industry, the requirements for automotive castings are getting higher and higher, and the
The existence of white zone is one of the characteristics of austempered ductile iron. Quenched martensite and retained austenite are
1.Test result The large number of tests have been carried out according to the above process plan, and the overall
It can be seen from the table that the tensile strength and impact toughness of nodular cast iron show high
In order to minimize the content of harmful elements, the selected raw materials should be relatively pure, so high-quality pig
At different austenitizing temperatures and isothermal temperatures, the bending fatigue test results of ductile iron specimens at room temperature are
The tensile test shall be carried out in accordance with gb/t 228-2002 tensile test method for metallic materials at room
The cooling curves of typical flake graphite cast iron and nodular cast iron are shown in the figure. It can
As cast crankshaft castings with nodular cast iron trademark of QT800-2 are selected as the samples. After testing, the nodularity
On the premise of good spheroidization of graphite, the mechanical properties of nodular cast iron can be adjusted in a
There are two traditional solutions to the shrinkage defects of lost foam casting nodular iron castings. One is to set
The inclusion of reducer housing is related to the process characteristics of lost foam casting nodular cast iron, which can
The carbon content of ductile iron castings in lost foam casting is generally 3.5% ~ 3.8%, which is easy to
When nodular cast iron is cast, the amount of nodularizing agent will directly affect the graphite morphology in cast iron,
Lost foam casting nodular cast iron has the advantages of good surface quality, high dimensional accuracy and high process yield.
By controlling the size and distribution of graphite diameter and the spherical regularity of graphite, the correlation degree with the
The figure is the matrix structure diagram of the vibration lost foam casting ductile iron, in which figures (a) –
Fig. 1 (a) and Fig. 1 (b) show the hardness and strength changes of three groups of nodular cast iron
Figure 1 shows the graphite morphology of the nodular cast iron by vibration lost foam casting, in which figure 1
Fig. 1 shows the microstructure SEM of three groups of ductile iron samples. It can be seen from the figure
The figure below shows the graphite morphology at different wall thicknesses of lost foam casting ductile iron. Figures (a) –
Under normal circumstances, the number of graphite balls in nodular cast iron will affect the matrix structure and stress distribution
As the nodular cast iron treated at 1560 ° C has been obviously white cast, it is not satisfied with
In practical production, the shape of castings is usually irregular, and the wall thickness varies greatly. These factors have an
Fig. 1 is the variation curve between mechanical properties and amplitude of EPC ductile iron. It can be seen from