The drive wheel is an important part of a large crawler agricultural tractor. The material grade of nodular cast iron is GGG60-DIN1693. See the table for the mechanical properties of the material. The overall dimensions are ϕ 916 mm × 526 mm, 260 kg mass, gear structure, 19 teeth...
In order to stabilize the melting quality of molten iron, the chemical composition shall be selected and strictly controlled as follows: w (C) 3.6%~3.7%, w (Si) 2.55%~2.65%, w (Mn) ≤ 0.2%, w (P) ≤ 0.03%, w (S) 0.008%~0.012%, w (Mg) 0.04%~0.05%. The spheroidizing method of nodular cast iron adopts...
A. Cost problem: Although the as-cast high-performance ductile iron has less heat treatment than ADI castings, and has certain economic advantages, the price of raw and auxiliary materials and alloys for casting is rising, and the high-performance ductile iron has strict control requirements on the quality of raw and...
According to the comparison table of various casting methods, it can be seen that each process has its advantages and disadvantages. However, according to the comprehensive analysis and comparison of factors such as the investment of production equipment, the complexity of process, the level of production efficiency and the...
In the casting process of nodular cast iron piston ring, it can be divided into two types: single piece casting, double piece casting and barrel casting. These casting processes mainly have the following characteristics. (1) The shape of blank casting is simple: the blank shape of single ring, double...
Nodular cast iron piston rings are more and more widely used in various engines such as agricultural machinery, automobiles and cars, mini cars and motorcycles Φ one hundred and ten Φ one hundred and fifteen Φ 120 and other single cylinder diesel engines, 4 102, 4 105, 6 110,...
1. Carbon content The carbon in the nodular cast iron piston ring does not damage the mechanical properties like the gray cast iron ring. As long as there is no graphite floating, the choice of high carbon is beneficial: ① high carbon and many graphite crystal nuclei can refine...
The inoculant used in the production of nodular cast iron piston rings is a special mixed inoculant, which is composed of customized s inoculant and M inoculant in a certain proportion. The inoculation effect of single double piece nodular cast iron piston ring is obviously better than the commonly...
The pig iron with 40% ~ 100% of the above components and less than 60% of the return material are melted in a 150kg medium frequency furnace. Strengthen the operation process to ensure that the spheroidizing temperature of nodular cast iron reaches 1500 ~ 1550 ℃, and the time...
German experts have repeatedly stressed that “the key to the production of nodular cast iron piston rings lies in raw materials”. It is difficult to produce nodular cast iron piston rings without qualified raw materials. They emphasized the use of high-purity pig iron or synthetic pig iron. Its composition...