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Carburization is used to case harden steel parts. The process involves heating a part to some critical temperature and diffusing extra carbon into it. Generally, more carbon = harder steel. The result is a hard outer shell around 1/20" - 1/10" thick. The insides usually remain soft and unaffected. This is desirable because it creates a wear resistant part with a durable core. You will see this done to machine tools, gears, shafts, and all sorts of high wear items.The "ancients" used to do this by packing charcoal and steel parts into some sort of clay jar and putting the whole mess into a hot fire for a day. Nowadays, you just give the local heat treatment shop $70 and they give the part back to you the next day =)BTW, did they mention what alloy the con rods are made of?
Carburization is used to case harden steel parts. The process involves heating a part to some critical temperature and diffusing extra carbon into it. Generally, more carbon = harder steel. The result is a hard outer shell around 1/20" - 1/10" thick. The insides usually remain soft and unaffected. This is desirable because it creates a wear resistant part with a durable core. You will see this done to machine tools, gears, shafts, and all sorts of high wear items.
The "ancients" used to do this by packing charcoal and steel parts into some sort of clay jar and putting the whole mess into a hot fire for a day. Nowadays, you just give the local heat treatment shop $70 and they give the part back to you the next day =)
BTW, did they mention what alloy the con rods are made of?
