快削電磁ステンレスの特性におよぼす引抜加工の影響

概要

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A study has been made about the variation of properties of free-machining magnetic core stainless steel by drawing and subsequent annealing.The magnetic properties become worse with increasing of drawing ratio, but they are recovered by annealing with progress of recrystallization. The temperature at which the recovery of magnetic properties starts is found to be about 100°C higher (about 600°C) than that in the case of free-machining magnetic core iron and 1% silicon iron. The magnetic properties are, at the drawing ratio of 10-15%, improved largely and 800 or 850°C is recommendable as the annealing temperature.The magnetic properties are generally excellent by aluminum addition. Even in 900°C annealing, there is not any formation of γ phase and no deterioration of magnetic properties can be seen.
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