抄録
In this paper, the depth of surface layer formed by superfinishing on the test pieces of carbon steel (0.1%C, 0.3%C, 0.9%C) and gauge steel, was measured by a newly modified microhardness method.
The depth of surface layer by this method was nearly equal to that by etching method, and the values were 35 μ (0. 1%C), 35 μ (0. 3%C), 24 μ (0. 9%C), 1.5 2 μ (gauge) respectively.
