Effect of heat treatment process on mechanical properties of nodular cast iron
The figure shows the difference of mechanical properties of nodular cast iron of series a samples under as cast and […]
The figure shows the difference of mechanical properties of nodular cast iron of series a samples under as cast and […]
In addition to chemical composition, the influence of other production processes mainly refers to the influence of melting process, spheroidizing
The main causes of poor plasma nitriding of precision casting parts are heat treatment temperature, heat treatment time, nitrogen concentration,
Bismuth can significantly increase the number of graphite spheres. When the number of graphite balls in nodular cast iron increases,
The effects of silicon, copper and Bismuth on mechanical properties were analyzed. The figure shows the effect of silicon on
During the sample preparation of nodular cast iron, the discharge temperature, pouring temperature, spheroidizing treatment time and total pouring time
The production process of nodular cast iron to be designed in the experiment mainly includes melting process, molding process, spheroidizing
The first Pouring Scheme of cylinder head – the temperature field distribution of sand casting with single side top injection
(1) Improvement scheme of sand casting process improvement measures for defects such as sand holes and pores are as follows.
Trace elements are interfering spheroidizing elements, but due to the neutralization effect of rare earth elements added in production, adding
After spheroidizing treatment, spheroidizing elements will make nodular cast iron have a greater tendency to white. At this time, inoculation
Metallographic structure and scanning electron microscope observation of the alloy select the parts with serious corrosion and take samples along
The research on the chemical composition of nodular cast iron provides a reliable basis for the composition design of the
All the mandatory clauses in the current nine mandatory national standards for foundry machinery have been integrated, streamlined and revised
Carbon is the main element in steel and plays a decisive role in the matrix structure of steel. A small
With the continuous development of mechanization and integrated construction in China, the scale of construction machinery industry is expanding year
Since the sand casting material is aluminum alloy ZL105, an open gating system is adopted. It has the following characteristics:
Common alloy elements include nickel, copper, aluminum, chromium, vanadium and other elements. 1.Nickel Nickel is a chemical element commonly used
There are five basic elements: carbon, silicon, manganese, phosphorus and sulfur. 1.Carbon Carbon is the direct source of graphite ball.
(1) Gating system optimization. Aiming at the problem of unstable liquid metal filling, the gating system was improved. The optimized
1. Chemical composition of corrosion products on the surface of cast parts In order to prevent other foreign impurities from
Through the analysis of the failed parts by the method of factor diagram, the reasons for the fracture of the
(1) Mold filling simulation analysis. Figure 1 and Figure 2 are the simulation diagrams of sand casting at 7.5 s
The pouring position of sand mold casting is the position of the casting in the mold during pouring. It directly
The sand casting process adopts two box molding and furan resin sand molding and core making. The diameter of the
The working environment of engine cylinder head in the engine is poor, which needs to bear high thermal load and
According to the analysis of sand casting process, the design of three gating systems is put forward. The influence of
Graphical user interface (GUI) refers to the interface that is convenient for users to operate the computer through graphics to
For the second Pouring Scheme of cylinder head, the temperature field distribution of symmetrical top injection inner gate during mold
Firstly, the sand core design and block processing of the model are carried out. At the same time, the block