Chemical composition of vermicular graphite cast iron
Vermicular graphite cast iron is a kind of gray cast iron with transition form between flake and spherical graphite. It […]
Vermicular graphite cast iron is a kind of gray cast iron with transition form between flake and spherical graphite. It […]
In 1947, H. morrogh, an Englishman, discovered vermicular graphite in the process of studying the treatment of nodular cast iron
(1) Increase the use of return material In order to reduce cost and increase efficiency, the consumption of return material
Brake disc has been widely used in the braking system of rail vehicles. Vermicular graphite cast iron is a new
1. Melting process of alloy vermicular graphite cast iron for brake disc (1) Raw materials and chemical composition Pig iron,
The microhardness of the machined surface was measured by MH- 6 microhardness tester. During the test, the pressure load was
The surface roughness is measured by using the TR200 handheld roughness meter of Beijing Times Instruments, and the roughness is
At the end of the experiment, the machined surface of the workpiece was observed by Keynes laser microscope (VK-X200K). In
The blade used in the experiment is monolithic PCBN and the binder is A1. Figure 1 shows the energy spectrum
In the process of cutting, the heat in the cutting area gradually accumulates at the arc of the tool tip,
PCBN cutters can be used for rough machining to improve machining efficiency, or finish machining to improve surface quality. This
The source of cutting force is the resistance of the tool to overcome elastic deformation, plastic deformation and friction. The
The experiment was carried out in the DAEWOOACE-V500 vertical machining center. The schematic diagram of orthogonal milling is shown in
In orthogonal turning, only one straight cutting edge is involved in the cutting, and the cutting edge is perpendicular to
Figure 1 shows the small Hopkinson pressure bar equipment used in this experiment. Figure 2 is a schematic diagram of
Vermicular graphite cast iron, as a material that can replace gray cast iron, will be widely used in the future.
At present, there are few studies on the cutting simulation of vermicular cast iron. According to the different three phases,
In the research and application of vermicular cast iron, Europe is in the leading position in the world. In the
In the 1960s, China began to study vermicular cast iron, but the production and processing of vermicular cast iron is
As shown in the figure, the phase diagram of gjv450 vermicular graphite cast iron seen under the laser microscope after
Many studies have shown that the tool life of cutting vermicular graphite cast iron is 1/10 of that of cutting
Hopkinson pressure bar equipment can flexibly replace sleeves of different diameters, corresponding to incident rods and transmission rods of corresponding
The relationship between stress, strain, strain rate and temperature of materials is its inherent property. There are many studies on
In the 1950s, kdmills and other scholars discovered vermicular graphite cast iron, but it did not attract attention at that
Internal combustion engine occupies a very important social position in power machinery. The internal combustion engine has high thermal efficiency,
In order to have an effective understanding of vermicular graphite cast iron technology, we must have a comprehensive understanding of
In order to control the content of some trace elements (Ti, Pb, etc.) in Vermicular Graphite Cast Iron and ensure
The results show that the cooling rate of heavy section vermicular graphite cast iron is slow and the undercooling degree
As for the development of vermicular graphite cast iron technology, in 1948, the Americans applied it. However, due to the
1. improvement of vermicular treatment equipment When the company produces vermicular graphite cast iron engine cylinder block and cylinder head,