借助于缺口慢拉伸试验研究了马氏体时效不锈钢延迟断裂倾向对时效温度的敏感性.研究结果表明,正常冶炼和加工的材料氢的质量分数在2×10-6以下,420和440℃欠时效处理的试样仍发生氢致延迟断裂;而460℃以上时效的缺口试样慢拉伸(0.0015 mm/min)的抗拉强度和断裂行为类似于快拉伸(0.15 mm/min),即不发生延迟断裂.
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