本文主要介绍了作者采用Brown提出的悬臂弯曲法对D6AC钢的应力腐蚀性能所作的研究工作。用悬臂弯曲预裂纹试样对两种回火温度处理的D6AC钢在蒸馏水中的K_1scc和da/dt进行了测定,结果表明:D6AC钢在蒸馏水中具有应力腐蚀开裂敏感性,而且应力腐蚀开裂是沿晶的。对于高温回火使用的D6AC钢,选用550℃回火有利于提高其抗应力腐蚀性能。 This article mainly introduces the author’s work on the stress corrosion resistance of D6AC steel proposed by Brown using cantilever bending method. K_1scc and da / dt of D6AC steel treated with tempering temperature in distilled water were measured by cantilever pre-cracked specimens. The results show that D6AC steel has stress corrosion cracking sensitivity in distilled water and the stress corrosion cracking is Along the crystal For high temperature tempering D6AC steel, the choice of tempering at 550 ℃ is conducive to improving its stress corrosion resistance.