分析了钢材生产过程中产生裂纹的原因及裂纹形成的条件，综述了塑性损伤与修复理论及在热轧棒材生产中的现实意义，探讨了消除裂纹的工艺措施。 The causes of cracks in steel production and the conditions of crack formation were analyzed. The theory of plastic damage and repair and the practical significance in the production of hot rolled bars were reviewed. The technological measures to eliminate cracks were discussed.