造船龙门起重机车轮轴断裂原因分析
Physical Testing and Chemical Analysis Part A:Physical Testing(2016)
Abstract
某造船厂一台龙门起重机车轮轴在服役4 a(年)之后发生断裂,通过现场勘查并对试样进行理化检验,分析了该车轮轴断裂的原因.结果表明:该车轮轴轴肩部位存在较深加工痕迹和缺欠,在承受较大交变剪切应力之后,表层加工痕迹和缺欠成为疲劳裂纹源,撕裂表层针状铁素体向内扩展,最终导致车轮轴发生断裂失效.
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