Manufacturing method of ultra-large-section low-temperature high-toughness ferrite spheroidal graphite iron casting
A technology of super large cross-section, ductile iron, applied in manufacturing tools, casting equipment, molds, etc., can solve the problems of poor mechanical properties of ductile iron, large diameter of graphite nodules, and reduction of the number of graphite nodules, etc., to prevent spheroidization. Recession, increasing strength and hardness, preventing graphite distortion
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[0033] The present invention will be described in more detail through specific examples below.
[0034] Manufacture of ultra-large cross-section low-temperature high-toughness ferritic nodular cast iron container with a weight of 60 tons, a diameter of 2575mm, and a wall thickness of 560mm:
[0035] The specific manufacturing steps are as follows:
[0036] The first step, shape: such as Figure 1~3As shown, the metal type 1 with a water cooling device made of QT400-18 is used. For the convenience of processing, the metal type 1 used is composed of six arc-shaped plates with the same structure connected by bolts; due to the wall thickness of the manufactured container Larger, the present invention adopts a powerful cooling device of water cooling + chilled iron to cool the casting (if the wall thickness of the casting is relatively thin, it is also possible to use only a metal mold with a water cooling device, the structure diagram of a single arc-shaped plate is shown in Fi...
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