In the production of low temperature ductile nodular cast iron, the common method is to add nickel, which can improve the impact toughness of nodular cast iron to a level of 40 ℃. As China’s nickel resources are very limited, the current domestic market price of nickel is about...
Excavators are widely used in highway, bridge, construction, breeding pond, underground engineering, emergency excavation and other engineering construction fields. It is characterized by large power and high efficiency. The hydraulic multi-channel valve control system is one of the heart components of excavator, and the multi-channel valve body is its...
(1) Composition control and selection of as Cast Ferritic Nodular Iron: Micro hypereutectic composition, in which the carbon is slightly higher, but there is no graphite floating, the silicon content is slightly lower, the silicon content of inoculant should be less than 3%, the lower the manganese, the better,...
In addition to Si, Mn and C elements, a certain amount of Cu is added to nodular cast iron. Cu can stabilize austenite, promote the formation of bainite and refine the acicular structure of bainite to a certain extent. Cu can also improve the austenitizing speed of Austempered Ductile...
ZHY casting produced a batch of 500mm ductile iron valve castings for an enterprise in Japan. The valve is composed of valve body and valve plate. The outline dimension of the valve body is 770mm × 699mm × The pouring weight is 20350mm (see the following figure, the maximum...
In recent years, with the continuous expansion of the market, the number of valve ductile iron parts in our factory has increased year by year, mainly including the valve body and bonnet of large-diameter butterfly valve and gate valve. The maximum diameter DN 1200 mm, the maximum casting weight...
Under the same production conditions, the process yield and scrap rate of three different casting process schemes were obtained. Scheme 1 has high process yield and qualified rate, which is the ideal process scheme among the three schemes. First, the runner runner is placed above the inner runner, which...
Using proe software for three-dimensional modeling and ProCAST software as simulation analysis means, the casting process of ductile iron shell parts in lost foam casting was analyzed, and its lost foam casting process was optimized. Firstly, the mold filling and solidification process of nodular iron shell is simulated and...
As a high-performance material, nodular cast iron has been widely used in many industries. After years of development, the output of nodular cast iron is the second largest application material after gray cast iron. Therefore, more and more manufacturers are constantly optimizing and improving the process. The production process...
1. Determination of structural characteristics and blank size of lost foam Castings Figure 1 shows the shell model of Large Diameter Ductile Iron ws-150 water meter. The water meter has large flow, high pressure resistance, length and height of 500 mm × 370 mm, the inner and outer cavities...