为解决元宝梁冲压开裂问题，用ＯＭ 和 ＳＥＭ 等仪器与 ＡＢＡＱＵＳ 有限元仿真软件对 ６００ ＭＰａ 级元宝梁用钢冲压开裂原因进行了分析．结果表明：６００ ＭＰａ 级元宝梁用钢化学成分、力学性能与冷弯性能均满足标准要求，金相组织为准多边形铁素体与少量珠光体的混合组织，不存在带状组织；开裂件断口形貌呈现出明显鱼骨状形貌，钢板中心分层，两侧分布起源于中心分层并沿同一方向扩展的三角形台阶状断口，不同形貌断口均属于韧性断裂，而断口整体形貌显示材料在断裂前没有发生缩颈过程．利用 ＡＢＡＱＵＳ 软件对“先冲压再压边工艺”与“先压边再冲压工艺”两种工况进行有限元分析，结果显示：先冲压再压边工艺边部应力集中更严重，边部节点应力超过了材料抗拉强度从而导致撕裂现象的发生；由“先冲压再压边工艺”改为“先压边再冲压工艺”后元宝梁冲压开裂率由５０％降至 ０，材料边部变形均匀，未见缩颈与开裂现象发生． In order to solve the problem of stamping and cracking of ingot beam, the causes of stamping and cracking of ingot beam of 600 MPa grade ingot were analyzed by OM and SEM instruments and ABAQUS finite element software. The results show that the chemical composition, mechanical properties and cold bending properties of 600 MPa grade steel satisfy the standard requirements. The microstructure is composed of a mixture of quasi-polygonal ferrite and a small amount of pearlite. There is no banded structure. Showing a prominent fish bone shape, the center of the steel sheet delamination, both sides of the distribution originated in the central delamination and along the same direction of the triangular step-shaped fracture, fracture of different morphologies are ductile fracture, and the overall shape of the fracture surface shows that the material in Necking did not occur before fracture. The ABAQUS software was used to analyze the two conditions of “first stamping and then pressing” and “First stamping and then stamping”. The results showed that the stress concentration in the edge of the first stamping and redishing process was more serious, Exceeds the tensile strength of the material resulting in the occurrence of tearing phenomenon; from “first stamping and then pressing process” to “first stamping and then stamping process” ingot beam stamping cracking rate decreased from 50% to 0, the material deformation of the edge Uniform, no necking and cracking occurred.