锻造裂纹是钢在锻造过程中形成的裂纹是多种多样的，形成原因也各不相同。主要可分为原材料缺陷引起的锻造裂纹和锻造本身引起锻造裂纹两类。属于前者的原因有残余缩孔、钢中夹杂物等冶金缺陷；属于后者的原因有加热不当、变形不当及锻后冷却不当、未及时热处理等。有些情况下裂纹的产生可能同时含有几方面的原因。
淬火裂纹的组织特征是裂纹两侧无脱碳现象，明显区别与锻造裂纹和材料裂纹。
Quenching crack propagation characteristics of the organizations on both sides without decarburization phenomenon significant difference between crack and materials and forging cracks.
在大型锻造中如何预防锻造裂纹缺陷，如何采用先进适用技术，提高经济效益等，是当前生产中的关键课题。
How to prevent forging cracking defects, how to adopt advanced and adaptable technology to heighten economy benefits in large forging are the key problems in production at the present moment.
锻造工艺不当也会出现晶粒大或不均，硬化裂纹现象，锻造成本高于铸造法兰。
Improper forging process will also appear large grain or uneven, hardening crack phenomenon, forging cost is higher than the casting flange.
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