Year1
- 材质：
- HT250
- 型号：
- 齐全
- 硬度：
- HB300
(Lathe Castings) (Large Castings) have good wear resistance and shock absorption properties. Since the graphite in cast iron is beneficial to lubrication and oil storage, it has good wear resistance. Likewise, gray cast iron is better at absorbing shock than steel due to the presence of graphite.
(Lathe castings) (large castings) have good process performance. Because gray cast iron has high carbon content and is close to the eutectic composition, it has a relatively low melting point, good fluidity, and small shrinkage, so it is suitable for casting complex structures or thin-walled castings. In addition, because graphite makes it easy to form chip breakers during cutting, the machinability of gray cast iron is better than that of steel.
Standards
2. Characteristics of the lathe
Good wear resistance and shock absorption. Since the graphite in cast iron is beneficial to lubrication and oil storage, it has good wear resistance. Likewise, gray cast iron is better at absorbing shock than steel due to the presence of graphite.
Good process performance. Because gray cast iron has high carbon content and is close to the eutectic composition, it has a relatively low melting point, good fluidity, and small shrinkage, so it is suitable for casting complex structures or thin-walled castings. In addition, because graphite makes it easy to form chip breakers during cutting, the machinability of gray cast iron is better than that of steel.
3. The relationship between hardness and tensile strength: There is a certain corresponding relationship between the hardness and tensile strength of gray cast iron. The empirical relationship is
, when/mm㎡ HB= (fly+) (B)
, when/mm㎡ HB= (+) (B) The relative hardness () value in the formula is mainly determined by the raw materials, melting process, treatment process and cooling rate of the casting
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