Improving fatigue wear resistance of gray cast iron by laser alloying biomimetic treatment
The results show that the laser surface biomimetic strengthening technology can effectively improve the fatigue wear resistance of gray cast […]
The results show that the laser surface biomimetic strengthening technology can effectively improve the fatigue wear resistance of gray cast […]
The development of cast iron technology at home and abroad requires that gray iron castings not only have good mechanical
Laser surface strengthening technology is widely used because martensite, austenite, carbide and other strengthening phases occur in the machining area.
In order to make gray cast iron more widely used, the graphite morphology in gray cast iron must be strictly
According to the body surface characteristics of wear-resistant organisms, hard elements on such non smooth surfaces are often distributed in
The figure shows the effect of scrap content on the hardness and tensile strength of gray cast iron. It can
The figure shows the fracture morphology of gray cast iron with different vibration frequencies. Among them, figures (a) – (d)
The macroscopic fatigue defects of rolling fatigue wear are mainly formed by the propagation of fatigue microcracks. Fatigue micro cracks
The figure shows the graphite morphology of gray cast iron prepared under different amplitudes. Figures (a) – (b) show the
The microstructure of grey cast iron samples with three different contents of scrap steel is shown in Fig. 1 and
The inheritance of tin in raw and auxiliary materials and the introduction of Ti element will increase the tin particles
(1) Effect on hardness of gray cast iron Fig. 1 shows the effect of vibration frequency on the hardness of
Pig iron is one of the main raw materials of gray cast iron. Figure (a) shows the metallography of pig
Many gray particles can be observed in the SEM picture of Fig. 1 (a). Therefore, the cross-sectional component surface scanning
Gray cast iron is one of the most commonly used metal materials for automotive parts such as engine, because of
In order to research the change of austenite dendrite structure of gray cast iron from the perspective of thermodynamics, two
Carry out the research on the influence of tin in gray cast iron on its performance. First, carry out the
According to the relation diagram, for gray cast iron during cooling and solidification, at a certain temperature, the content of
In the melting process of gray cast iron, the larger tin particles in the raw and auxiliary materials failed to
Figures 1 and 2 show Fe Ti binary phase diagram and N Ti binary phase diagram respectively. The maximum solid
In the process of vibration lost foam casting of gray cast iron, the vibration promotes the convection of metal solution,
As the largest automobile production and consumption country in the world, China has huge development space and broad prospects for
The influence of alloying elements on the microstructure of cast iron mainly occurs in two stages: solidification stage, in which
Gray cast iron is often used to manufacture engine block and other smart car parts because of its unique properties.
1.Hardness test The sampling position of the hardness sample of the grey cast iron cylinder block is shown in Figure
1.Metallographic observation The metallographic sample is taken from the gray cast iron cylinder body, cut and sampled with a cutting
The figure shows the graphite morphology of gray cast iron prepared under different vibration frequencies. Among them, figures (a) –
With the rapid development of industrial technology, people have higher and higher requirements for material properties, as well as gray
Figure 1 shows the model of a high-strength gray cast iron engine cylinder block. The main processes include raw material
Iron carbon equilibrium phase diagram is indispensable for the foundation of cast iron, which has theoretical guiding significance for the