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对34CrNi3Mo螺栓调质后出现纵向裂纹的原因进行宏观和微观分析。结果表明,34CrNi3Mo螺栓原材料存在的严重非金属夹杂及淬火应力导致螺栓开裂。
The macroscopic and microscopic analysis of the causes of longitudinal cracks in 34CrNi3Mo bolt after quenched and tempered. The results show that the 34CrNi3Mo bolt material exists serious non-metallic inclusions and quenching stress lead to bolt cracking.