Effect of vibration frequency on Microstructure and properties of gray cast iron
The influence of vibration frequency on the microstructure and properties of gray cast iron in lost foam casting was studied […]
The influence of vibration frequency on the microstructure and properties of gray cast iron in lost foam casting was studied […]
The microstructure and properties of high strength gray cast iron produced by sand casting were improved; The effect of hard
Gray cast iron is mainly composed of matrix structure and graphite, and others include eutectic group, carbide and cementite eutectic.
The figure shows the relationship between Brinell hardness of gray cast iron and sample wall thickness. It can be seen
The figure shows the matrix structure of gray cast iron with different wall thickness. Among them, figures (a) and (a’),
The figure shows the fracture morphology of grey cast iron prepared under different amplitude conditions. Among them, figures (a) –
When the microcrack propagation no longer depends on the material surface conditions, the crack initiation stage ends, and the crack
The figure shows the austenite morphology of gray cast iron prepared under different vibration frequencies. Figures (a) – (d) show
The figure shows the graphite morphology in gray cast iron with different wall thickness. Among them, figures (a) – (c)
The graphite in gray cast iron is flake, which is the most widely used cast iron, and its output accounts
The wear caused by the severe friction of the brake drum in the braking process and the fatigue cracking caused
In order to better study the fatigue wear resistance of gray cast iron brake material, after every 150 thermal cycles,
After the molten iron is poured into the crucible, the temperature of gray cast iron has a stable process, that
Laser parameters and different materials have great influence on laser melting unit. Studies have shown that when the scanning speed
The thermal fatigue resistance of materials is closely related to the tensile strength. Figure 1 shows the fracture morphology of
When studying the effect of carbon content on the thermal fatigue performance of laser bionic gray cast iron, the graphite
Generally speaking, the eutectoid transformation starts from the formation of cementite sheet at the austenite grain boundary. The formation and
Change trend of white mouth width of triangular test piece: 5.5mm; 4.6mm ; 3.8mm; All white mouth; All white mouth
Based on the study of gray cast iron brake drum, through the study of various brake drums, it is found
Tribology is a frontier discipline that has developed rapidly in recent 50 years. It mainly includes the research fields of
The oxidation of materials will promote the crack propagation, so it is necessary to study the oxidation resistance of gray
According to the outer contour, the eutectic group of gray cast iron can be divided into three types: spherical eutectic
Of low carbon equivalent gray cast iron modified by rare earth α- The lattice constant of Fe is measured by
Combined with the relevant theories of gray cast iron casting technology, laser bionic principle, thermal fatigue and tribological principle, the
The research on the thermal fatigue resistance of gray cast iron mainly focuses on the graphite, matrix structure and chemical
It can be seen from the measurement results of free linear shrinkage and its corresponding relationship curve in the table
Figure 1 shows the microstructure changes of gray cast iron matrix and unit without thermal fatigue and 300 thermal cycles.
1. Base metal structure of different graphite types Figure 1 shows the graphite type of no.a-no.e, and its chemical composition
Gray cast iron has the advantages of good castability, low casting cost, easy cutting and excellent shock absorption. It is
The hardness of low carbon equivalent gray cast iron treated with rare earth is also compared with HT250 inoculated with