Researches on Hot Machining (Part 2)

The Influence of Temperature on Mechanical Properties of Work Material

Abstract

Mechanical strength of paraffin, used as work material for hot machining, is decreased by heating from 9.03×10-² kg/mm² at 11°C to 0.66×10-² kg/mm² at 40°C for shearing strength and from 23.5×10-² kg/mm² at 7 °C to 1.1×10-² kg/mm² at 40°C for compressive.
The coefficients of friction between paraffin and tool material (H. S. S.) are changed from 0.41 to 0.25 by heating to 44°C from 9°C and have the minimum value at 25°C. In high temperature paraffin tends to be adhesive.