nodular cast iron

Using 340mm feldspar ink probe, add ultrasound into the spheroidizing bag, the action time is 1min, and the indication of

After spheroidizing, the experimental molten iron is poured into the mold, ultrasonic wave is applied to one of the cavities,

Compared with gray cast iron, nodular cast iron has strict requirements for chemical composition. The raw molten iron of nodular

As shown in Figure 1, the scanning photo of impact fracture micro morphology of B2 sample of nodular cast iron

The composition of nodular cast iron crankshaft obtained from ZHY Casting is shown in the table. Cinnamon sand is used

In order to further study the impact toughness of nodular cast iron for wind power fittings, the impact fracture of

The testing experiments of nodular cast iron wind power castings include chemical composition testing, mechanical property testing, metallographic structure analysis

At present, the most commonly used spheroidizing agent for nodular cast iron in China is rare earth silicon iron magnesium

Both graphite ball and matrix will affect the mechanical properties of nodular cast iron. It is found that with the

Referring to the latest ductile iron standard GB / t1348-2009, the brand, mechanical properties and metallographic structure of ductile iron

According to GB9441-2009 metallographic inspection standard for nodular cast iron, the pearlite content in the as cast matrix is graded.

The spheroidizing treatment process of nodular cast iron mainly includes the types of spheroidizing agent and the adding method of

Through the observation of metallographic photos, the spheroidization level of a1-a8 and B1-B4 and the size level of nodular graphite

The figure shows the change law of impact toughness of nodular cast iron of B2 and B4 samples with temperature.

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

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