Effect of solidification pressure on Impact Wear Properties of chromium white cast iron
Because the chromium white cast iron used in the experiment is brittle material and has not been heat treated, the […]
Because the chromium white cast iron used in the experiment is brittle material and has not been heat treated, the […]
At present, there are few studies on the cutting simulation of vermicular cast iron. According to the different three phases,
Impact toughness is an important index of large wear-resistant plate. It refers to the ability of material to absorb plastic
In the research and application of vermicular cast iron, Europe is in the leading position in the world. In the
It can be seen from Figure 1 that compared with the normal pressure, the hardness of the alloy can be
In the 1960s, China began to study vermicular cast iron, but the production and processing of vermicular cast iron is
Different from equilibrium solidification, the solidification process of alloy melt under pressure is controlled by nucleation and subsequent crystal growth.
Traditional sand casting often has design limitations in process, especially for the forming of complex castings, the differences of casting
As shown in the figure, the phase diagram of gjv450 vermicular graphite cast iron seen under the laser microscope after
The samples of Hypoeutectic and hypoeutectic chromium white cast iron were prepared by pressure casting. The effect of solidification pressure
It has been proved that different types of carbides have different hardness. The purpose of different casting processes is to
The results show that the morphology and distribution of primary phase and eutectic structure in the solidification structure of chromium
Besides discussing the interface structure, which is the mechanism of atom stacking and crystal morphology, we also need to discuss
In addition to the fine grain strengthening effect under pressure, the effect of pressure on carbide morphology is also worth
Crystal growth is a process in which the atoms in the liquid phase migrate and stack to the surface of
From the point of view of thermodynamics, primary carbides should only exist in hypereutectic alloy. But in fact, it can
Pressure casting is an advanced near net shape casting process. The melt bears high pressure after pouring and filling until
By developing the appropriate combination of microstructure phases, cast iron can obtain the required properties in any specific application. These
Because the composition of low chromium white cast iron alloy 1 is far away from eutectic point, the carbides are
When the volume fraction of carbide with high hardness in the solidification structure of Cr based alloy is 20 ~
In the solidification process of Hypoeutectic chromium white cast iron, the primary phase is austenite, the carbides in the solidification
The whole contour of eutectic structure in hypereutectic chromium cast iron is very similar to that of Hypoeutectic and eutectic
The total amount of carbides, eutectic carbides and primary carbides in alloy 2 are shown in the figure. The content
According to the different carbon content, the solidification structure of chromium alloys can be divided into hypoeutectic, eutectic and hypereutectic.
In order to better compare the solidification structures of different sampling positions under different pressures, the solidification structures of top,
The solidification structure of chromium alloys is closely related to the content of C and Cr in them. According to
(1) Solidification structure of specimens at different positions under atmospheric pressure The solidification structure of alloy 2 under normal pressure
Long term industrial practice shows that chromium white cast iron has excellent stability and relatively low production cost in high
The results show that the pressure, fluidity and cooling rate of liquid metal at different positions are different during solidification.
The stability of solid-liquid interface affects the morphology of microstructure and determines the final properties of materials. The expression of