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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 characteristics, mechanism and solution of hydrogen embrittlement fracture of steel parts are analyzed and summarized through examples. Practice has proved that after carbonitriding air-cooled and then re-heated quenching or 180 ℃ insulation 8h except hydrogen and tempering can be in addition to hydrogen to avoid hydrogen brittle fracture. Hydrogen embrittlement cracks preferentially surface cracking and the internal expansion of the macroscopic hydrogen embrittlement cracking few plastic deformation (tear) traces of brittle fracture, the majority of microscopic fracture cleavage quasi-cleavage-based, broken Like hydrogen embrittlement fracture is a typical feature of hydrogen brittle fracture.