抄録
The surface of heat-treated steel has recently been regarded as very important and various atmospheres have widely been applied to its heat-treatments.
In this paper, there are discoussed the behavior of furnace gases and the surface of heat-treated die steel by using the gas decomposed from CH3OH⋅C6H6 mixture, and H2, Ar, etc..
The results obtained were summarized as follows:
1) CO2 content decreased and CH4 content increased in the atmosphere produced from CH3OH⋅C6H6 mixture with the increase in C6H6 content of the mixture.
2) The gas decomposed from CH3OH⋅C6H6 mixture, which contained 1-5% of C6H6, showed carbon potential of 1.2-1.9% at 950-1, 050°C,
4) The oxide of die steel produced by heat-treatment in the gas decomposed from single CH3OH was Fe3O4, which was supposed to be produced by H2O (gas) in the atmosphere.
4) The luster of heat-treated die steel also depended upon its roughness.
