析出硬化型ステンレス鋼の高温における疲労強度(研究論文編)
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概要
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Rotating bending fatigue tests were carried out to investigate fatigue properties of high silicon stainless steel and SUS630 stainless steel, both of which were precipitation hardening stainless steel. The tests were performed at room temperature and elevated temperature of 400℃. Both static strength, fatigue strength increased on precipitation hardening stainless steel by the aging treatment. The high silicon stainless steel X material increased most on both static strength and fatigue strength among three kinds of steel. The fatigue strength at elevated temperature of 400℃ of the high silicon stainless steel X material was intensified further than solution heat treatment material of room temperature in all stress range. Although the initiation site of fracture was the surface of SUS630 stainless steel, it occurred in the specimen surface at high stress levels and the interior at low stress levels in the high silicon stainless steel X material.