The flame produced by burning propane—butane and acetylene in oxygen is stable, has a high carburizing capacity, and is suitable for high-temperature carburizing. The structure of the flame depends on the ratio of acetylene and propane—butane, and the ratio of oxygen and the gas mixture. ...
The structure of the oxy-propane-butane flame is such that it may be successfully used for flame hardening. When the flow ratio O 2 :(C 3 H 8 +C 4 H 10 ) 2.3 in a laminartype flame, then a zone with carburizing capacity appears. The highest carburizing power is inherent to a ...
heating zone in the periphery of a burning flame and in the carburizing completion part. ;CONSTITUTION: A work W as a material to be treated is provided to the inside of a chamber 1. Then, acetylene gas, not lower than the equivalent ratio to oxygen, is supplied into the chamber 1 and...