在低碳Cr-Mo-V钢中进行了不同方法的热处理以改变基体中碳化物组织的情况。热处理后作了显微观察、碳化物组成及定量金相测定和氢脆试验。试验结果表明,碳化物的分布及形状对于低合金高强度钢的氢脆敏感性有明显的影响。无论是淬冷加回火还是空冷加回火处理,随着回火时间的增长,表观氢扩散系数均趋于增加,表明了钢中陷阱密度的下降。 Different methods of heat treatment were performed in low carbon Cr-Mo-V steels to change the carbide structure in the matrix. After heat treatment, microscopic observation, carbide composition and quantitative metallographic examination and hydrogen embrittlement test. The test results show that the distribution and shape of carbides have a significant effect on the hydrogen embrittlement susceptibility of low alloy high strength steel. Both quenching and tempering or air-cooling and tempering treatment, with the increase of tempering time, the apparent hydrogen diffusion coefficient tends to increase, indicating that the decline in trap density in steel.