摘要
通过实例分析和总结了钢件发生氢脆断裂的特征、机理和解决措施。实践证明碳氮共渗后空冷再重新加热淬火或180℃保温8h除氢回火都可以除氢,避免氢脆断裂。氢脆的裂纹源优先表面开裂的形成并向内部扩展,宏观氢脆开裂断口很少有塑性变形(撕裂)的痕迹是脆性断口,微观断口多数是以解理准解理为主,碎条状氢脆断裂纹是氢脆断裂典型特征。
The paper analyzed and summarized steel＇s hydrogen embrittlement fracture characteristics, mechanism and remedy measures by examples. Practice has proved that after carbonitriding, air - cooled and then re -heating and quenching ,or re -heated 180℃ ,holding 8h to dehydrogenation tempering, all of which is dehydrogenation to avoid hydrogen embrittlement fracture. Hydrogen embrittlement is most transverse cracking, cracking source is prior to form on the surface and extend to the internal. Macroscopic fracture of hydrogen embrittlement has little plastic deformation, the trace of （tear） is brittle fracture. Most microscopic fracture mainly cleavaged in quasi - cleavaged, the crushed strip flowers of hydrogen embrittlement fracture is the typical characteristics of hydrogen embrittlement fracture.
出处
《阀门》
2016年第4期23-24,共2页
VALVE MAGAZINE
