C90油管钢的氢损伤  

HYDROGEN-INDUCED FAILURE OF OIL-WELL TUBULAR STEEL C90

作　　者：于广华[1] 程以环[1] 陈红星[1] 牛学军[1] 乔利杰[1] 褚武扬[1] 

机构地区：[1]北京科技大学,宝山钢铁公司

出　　处：《金属学报》1996年第6期617-623,共7页Acta Metallurgica Sinica

基　　金：国家自然科学基金

摘　　要：对比研究了三种油管钢（宝钢的Ｃ９０和日本的ＳＭ９０及ＳＭ９５）的氢致开裂性能．ＳＭ９０，ＳＭ９５和Ｃ９０产生氢损伤的临界扩散氢质量分数（×１０^（－６））分别为１．７６，４．３和８．３８；临界全氢质量分数（×１０^（－６））分别为４．２４，６．３５和１０．２２三种钢在Ｈ_２Ｓ中的门槛应力σ_（ｔｈ）／σ_ｓ分别为０．６４，０．８０和０．８５．三种油管钢抗氢损伤能力和抗氢致滞后断裂的能力是一致的，以Ｃ９０为最好，它和氢的扩散系数无关．Ｃ９０钢缺口试样氢致滞后断裂门槛值Ｋ_（ＩＨ）与可扩散的氢质量分数ｗ_０有关，实验获得Ｋ_（ＩＨ）＝４６－１２．５１ｌｎ_（ｗ０）．理论分析和实验结果完全一致．对Ｃ９０钢，当ｗ_０≤４．８×１０－６时，在任何Ｋ_Ｉ／Ｋ_Ｃ下均将获得韧窝断口；ｗ_０≥７．６×１０^（－６），Ｋ_Ｉ／Ｋ_Ｃ≥０．５时，则氢致韧断；Ｋ_Ｉ／Ｋ_Ｃ≤０．４时，则氢致脆断．Hydrogen-induced failure properties of three oil-well tubular steels(C90, SM90 and SM95) have been compared. The threshold diffusible hydrogen contents of steel SM90, SM95 and C90 for hydogen blistering are 1 .76, 4.3, and 8.38×10-6, respectively, and the total hydrogen contents 4.24, 6.35 and 10.22 × 10-6 respectively. The threshold stresses of hydrogen-induced fracture corresponding to SM90, SM95 and C90 in NACE solution are σ_(th) /σ_s = 0.64, 0.80 and 0.85, respectively. The threshold stress intensity of hydrogen- induced fracture for C90 decreases with the increase in the diffusible hydrogen content w_o and the experimental result which is consistant with theoretical analysis is as follows: K_(IH) = 46- 1 2. 5lnw_0.

关 键 词：氢损伤 油管钢 杂质 氢 

分 类 号：TG142.13[一般工业技术—材料科学与工程]