Failure Analysis on 42CrMo Steel Bolt Fracture

<table class="table-group" id="tab2"><tr><td><table class="table"><tr><td class="thead-hr" colspan="4"><hr/></td></tr><tr class="thead"><td class="align_left">Bolt</td><td class="align_center">Nonmetallic inclusions (level)</td><td class="align_center">Microstructure</td><td class="align_center">Grain size (level)</td></tr><tr><td class="thead-hr" colspan="4"><hr/></td></tr><tr><td class="align_left">/</td><td class="align_center">A2.0; B0; C0; D0.5e; DS1.0</td><td class="align_center">Tempered sorbite + small amounts of bainite</td><td class="align_center">8.5</td></tr><tr><td class="align_left">Test standard</td><td class="align_center">GB/T10561-2005</td><td class="align_center">GB/T13298-1991</td><td class="align_center">GB/T6394-2002</td></tr><tr class="table-tr"><td colspan="4"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>The results of the metallographic test.</div>

Advances in Materials Science and Engineering

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Table 2

Table 2: Failure Analysis on 42CrMo Steel Bolt Fracture 