Scientific

General materials contain some alloy compound phases. The existence of alloy compound phases enhances the matrix strength, hinders the crack

For cast iron, there will always be some unavoidable casting defects, such as shrinkage cavity and porosity. Casting defects have

The table shows the effects of the same alloying and different inoculants on the mechanical properties of gray cast iron.

The deformation of any material under external load will be affected by its own microstructure and properties and external environmental

For gray cast iron, its mechanical properties mainly depend on the matrix structure and flake graphite in it. The shape

The instantaneous fracture zone of fatigue crack is the area where the material is unstable and suddenly fractured. Due to

The fatigue crack growth region is the region of stable development after fatigue crack nucleation and initiation. Fatigue bands generally

The fatigue crack origin region is the region where the fatigue crack nucleates and initiates. The fatigue crack first nucleates

(1) Fatigue test of ordinary HT250 lifting Faraday compression The lifting diagram of tension compression fatigue limit of ordinary HT250

The tension compression fatigue fracture morphology of low alloy HT250 with different surface roughness is shown in the figure. Figure

Results of tension compression fatigue test of low frequency gray cast iron Among the 8 samples of low-alloy HT250 low-frequency

The low magnification morphology of tensile fracture of three grades of gray cast iron is shown in Figure 1. It

The tensile strength of ordinary HT250 at room temperature is slightly lower than the strength calibrated by its brand, which

The eutectic morphology of three grades of gray cast iron samples is shown in the figure. Eutectic clusters in gray

The figure shows the graphite morphology and distribution of three grades of gray cast iron samples. It can be seen

The tension compression fatigue tests of three grades of gray cast iron are carried out on plg-100 high frequency fatigue

The low-frequency tension compression fatigue test of gray cast iron adopts MTS810 axial tension compression fatigue test machine. It uses

The tension compression fatigue test of gray cast iron mainly studies the effects of loading frequency and surface roughness on

The test materials are three grades of gray cast iron, namely ordinary HT250, low alloy HT250 and HT300, in which