Cast Iron Machine Parts
Cast iron machine parts are produced by re-melting pig iron( the intermediate product of smelting iron ore) along with sizable quantities of scrap iron, limestone, scrap steel etc. The distinguishing feature of cast iron machine parts is that these generally have carbon content greater than 2 percent. The machine parts have high compressive strength and are resistant to wear and deformation.
Cast iron has been used in some form for over 2000 years. As for cast iron machine parts, their ease of production along with their inexpensive nature made the parts hugely popular during the industrial revolution. Presently, these machines parts are one of the most widely used of all machinery across various industrial sectors.
Manufacturing of Cast Iron Machine Parts
Cast iron machine parts have been manufactured pretty much in the same way since the parts were first made. To elaborate – Iron ore is first heated in a blast furnace with coke and limestone. This heating process de-oxidizes the iron ore, driving off impurities and also producing molten iron. The molten iron is then poured into molds of the desired shape and allowed to cool and crystallize, thus producing cast iron machine parts.
Properties of Cast Iron Machine Parts
The machine parts have high heat retaining ability.
These are resistant to weakening and destruction by oxidation.
Also resistant to weathering.
The cast iron machine parts have enhanced durability.
These have optimal fracture toughness.
The noteworthy thing here is the fact that properties of cast iron machine parts depend on three major factors. These are carbon content, cooling rate of the casting and the elements used for alloying.
Types of Cast Iron Machine Parts
Based on the type of cast iron being used for manufacture, the machine parts can be divided into four main categories. These are,
Gray cast iron machine parts
White cast iron machine parts
Nodular cast iron machine parts
Malleable cast iron machine parts