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How do you prepare anti carburising paste for alcohol carburising of metal?
I prepared it when i was a young boy of 30.hints are as follows. Ingredients=juit rope+chalk+water. Continue boiling till all of the rope becomes paste,then add chalk+additional water and stir for 10 hours.chalk powder should be very fine. Apply this past as anti .carb
What is 'carburising' why and how it is done?
Carburizing is a method of hardening iron or steel by a heat treatment that causes it to absorb carbon liberated from a carbon bearing material, such as charcoal or carbon monoxide.
Distinguish between an oxidising flame and a carburising flame in oxy- acetylene welding?
Basically, you need to look at the flame itself, if the tip of the nozzle is bluish/white, and long , then the flame is a carburising or reducing flame, it contains a high ratio of acetylene compared to oxygen, and will produce a cooler sooty flame. this can be used to make metals more malleable when working them, but the carbon is not helpful, and cannot be used for welding operations An oxidising flame is more pupleish/white and is far hotter, with more oxygen than acetylene, this flame is used in cutting, but will harden steel, making it brittle. in between the two is the neutral flame where welding operations are carried out. Images can be seen at: http://www.twi.co.uk/content/jk3.html (not my site)
What is difference between hardness and toughness?
Toughness is the ability of steel to absorb energy. Hardness is the ability of steels to withstand wear. Hardness is the ability of material to withstand the indent and is measured in rockwel or vickers. also it is a measure of stiffness of material. but hardenability is ability of material to become hardened by various methods of hardening such as carburising or quenching. it is firmly dependent on quantity of carbon in that material. and actually it doesn't have any measuring unit !
What is the difference between Hardness and Harden ability of steel?
ImproveToughness is the ability of steel to absorb energy.Hardness is the ability of steels to withstand wear. Hardness is the ability of material to withstand the indent and is measured in rockwel or vickers. also it is a measure of stiffness of material. but hardenability is ability of material to become hardened by various methods of hardening such as carburising or quenching. it is firmly dependent on quantity of carbon in that material. and actually it doesn't have any measuring unit !
