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本文研究测定了30Cr3SiNiMoVA钢的氢脆敏感性和抗应力腐蚀开裂性能,试验结果表明:超高强度钢30Cr3SiNiMoVA淬火态和淬火回火态的试样经渗氢镀镉处理后,100小时未断的临界应力值σ_c分别为118和120kgf/mm~2,σ_c/σ_(bH)比值分别为0.56和0.57,对氢脆较为敏感。去氢处理后性能有所改善。用表面裂纹法测定该钢在0.5％K_2Cr_2O_7水溶液中的应力腐蚀临界强度因子k_(Is)cc为73kgf/mm~3/~2,K_(Is)cc/K_(Ic)为0.28,该钢在0.5％K_2Cr_2O_7水溶液中应力腐蚀开裂是敏感的。
In this paper, the hydrogen embrittlement susceptibility and stress corrosion cracking resistance of 30Cr3SiNiMoVA steel were studied. The experimental results show that the samples of quenched and quenched and tempered samples of 30Cr3SiNiMoVA ultra-high strength steel are not damaged for 100 hours The critical stress values σ_c are respectively 118 and 120kgf / mm ~ 2, and the σ_c / σ_ (bH) ratios are 0.56 and 0.57, respectively, which are more sensitive to hydrogen embrittlement. Dehydrogenation performance improved. The critical strength factor k_ (Is) cc of the steel in the aqueous solution of 0.5% K_2Cr_2O_7 was 73kgf / mm ~ 3 / ~ 2 and the K_ (Is) cc / K_ (Ic) was 0.28 by surface crack method. Stress corrosion cracking in aqueous 0.5% K 2 Cr 2 O 7 solution is sensitive.