Internal combustion engine occupies a very important social position in power machinery. The internal combustion engine has high thermal efficiency, high power and zero line coordination, so the mechanical kinetic energy must have good application characteristics and advantages. It can be widely used in mechanical devices. As an important...
In order to have an effective understanding of vermicular graphite cast iron technology, we must have a comprehensive understanding of its graphite growth state and production mechanism. The graphite in vermicular graphite cast iron is called vermicular graphite cast iron because its production state is vermicular. During the growth...
In order to control the content of some trace elements (Ti, Pb, etc.) in Vermicular Graphite Cast Iron and ensure the processing performance, the main raw materials of vermicular graphite cast iron are the best. The specific standards are as follows: (1) The best choice of high purity pig...
The results show that the cooling rate of heavy section vermicular graphite cast iron is slow and the undercooling degree is low. After inoculation, the molten iron forms a small number of nuclei at a very small undercooling degree, which prevents the molten iron from supercooling to a temperature...
As for the development of vermicular graphite cast iron technology, in 1948, the Americans applied it. However, due to the influence of industrial technology at that time, vermicular graphite cast iron technology was not effectively promoted. For high-power internal combustion engine, it needs to be improved according to its...
1. improvement of vermicular treatment equipment When the company produces vermicular graphite cast iron engine cylinder block and cylinder head, the amount of vermicular iron in each package is generally less than 2 T, and the wire feeding treatment station is the way of forklift to transfer the treatment...
In order to obtain ADI material with stable structure and performance, the salt bath used for isothermal transformation should have the following characteristics: ① The salt bath shall be equipped with a device to prevent local overheating or local supercooling of salt bath to ensure the temperature of each...
Inoculation treatment: inoculation treatment of nodular cast iron can improve the roundness of graphite ball, improve the spheroidization rate, and assist the spheroidal growth of graphite. Inoculation is an important means to increase the number of graphite balls, and the number of graphite spheres has an important effect on...
The common graphite forms in spheroidal graphite iron contain globular graphite type, quasi-spherical temper graphite type, interdendritic graphite type and worm graphite type and etc.. The most representative one among all of them is globular graphite structure. Its appearance is roughly spherical in low power and is close to...