通过对0Cr13铁素体不锈钢丝的化学成分、显微组织、开裂形貌及夹杂物的分布等进行分析,以找到其在模压过程中发生开裂的原因。结果表明：该不锈钢丝的化学成分异常，碳含量较高，铬、锰含量较低;不锈钢丝中存在数量较多的碳化物和聚集分布的夹杂物，碳化物的尺寸为0.3～0.8 μm，呈暗灰色颗粒状,夹杂物的尺寸为15～25 μm，主要为氧化物、钙镁酸盐及硅酸盐;模压前，不锈钢丝已发生强烈的塑性变形，碳化物在晶界处塞积，组织不均匀，夹杂物与基体的交界处存在应力集中;模压过程中，材料发生塑性失稳，裂纹起源于夹杂物导致的应力集中区域，并向内部扩展，最终导致不锈钢丝发生开裂。

To find the cracking causes of 0Cr13 ferrite stainless steel wire during die pressing, chemical composition, microstructure, cracking morphology and inclusions distribution were analyzed. The results show that the chemical composition of the stainless steel wire was abnormal, and the carbon content was relative high and the content of chromium and manganese were relative low. Quantities of carbides and inclusions with gathering distribution existed in the stainless steel wire, the size of dark gray granular carbides was 0.3-0.8 μm, the size of inclusions was 15-25 μm, and the main inclusions were oxides, calcium-magnesium carbonate and silicate. Severe plastic deformation appeared in the stainless steel wire before die pressing, carbides piled up at grain boundaries, microstructure was inhomogeneous, and stress construction existed at the junction of inclusions and the substrate. During die pressuring, plastic instability happened, cracks originated from the stress concentration area caused by inclusions, and then expanded to interior and eventually resulted in the stainless steel wire cracking.