抄録
The effect of nickel plating in reducing the fatigue strength of carbon steels has been previously reported. The present report is made of the fatigue test that was carried out on the postnickel plating heat treatment (Baking) in order to investigate a method of level up on the reducing fatigue strength of nickel plated steel.
The test specimen were made of annealed S10C, annealed and quenched-tempered S40C steel in Table I. The nickel plating were prepared from a standard Watt's solution. The average thickness of nickel plating was about 85μ.
Heat treatment (Baking) after nickel plating, were carried out in air at temperature from 20°C to 550°C for 2 hours.
The test results are summarized as follows;
(1) Baking up to 250°C slightly increases the fatigue limit of nickel plated steel with decreased hardness of the nickel plating.
(2) But the treating above 550°C causes the fatigue limit below the plated value with decreased hardness of the steel and the plated nickel.
