加氢反应器壁材料的氢损伤特性

中国腐蚀与防护学报

2003, Vol. 23

Issue (3): 149-155

研究报告

本期目录 | 过刊浏览

加氢反应器壁材料的氢损伤特性

徐坚;钟曼英;郭世行

中国计量学院机械与电子工程分院

CHARACTERISTICS OF HYDROGEN DAMAGES FORHYDROGENATION REACTOR WALL-MATERIALS

Jian Xv;Manying Zhong;Shixing Guo

中国计量学院机械与电子工程分院

全文: PDF(229 KB)

摘要: 研究了在模拟加氢反应器工况条件下，国产加氢反应器壁材料［2(1/4)Cr-1Mo及其上的309L和347L不锈钢堆焊层］的氢损伤特性.结果表明：热渗氢后，明显降低了它们的断裂应力(σf)和塑性.对于309L和347L堆焊层，未经热渗氢的原始试样，无论是光滑试样还是缺口试样(除缺口位置在309L区域试样外)均断裂在347L区域内 .而经热渗氢后，无论是起裂于2(1/4)Cr-1Mo和309L的熔合线，还是309L和347L的熔合线处，最后都断在309L区域内(除缺口位置在347L区域试样外).这是因为热渗氢使309L和347L的 σf分别从原始状态的885 MPa降至478 MPa和从原始状态的799.9 MPa降至564 MPa ；在对短裂纹的低周疲劳特性研究中，用da/dN＝C(ΔJ)n计算了裂纹扩展速度(da/dN)和门槛值(ΔJth).经热渗氢后，ΔJth有明显的下降，da/dN～ΔJ曲线也向左移，提高了da/dN.SEM断口分析结果与上述结论一致.裂纹扩展以穿晶为主，热渗氢后有二次裂纹存在.说明热渗氢降低了其力学性能，增加了加氢反应器壁材料的断裂敏感性.

关键词 ：承载材料, 堆焊层, 热渗氢, SSRT, 低周疲劳

Abstract：The characteristics of hydrogen damages for hydroge nation reactor wall-materials,which include the structure material of 2(1/4)Cr-1 Mo and the weld overlay cladding of 309L and 347L,in original and hydrogen charg ed had been investigated.The results of slow strain rate testing(SSRT)indicated that ⅰ)Fracture stress and plasticity decrease obviously after thermal charging of hydrogen.ⅱ)For original specimens the fracture of both smooth and notched s pecimens occurred in the 347L region(except the specimen which notched in 309L r egion),but if specimens charged with hydrogen the fracture changed in 309L regio n(except the specimen which notched in 347L region).Because after thermally char ging with hydrogen the fracture stress dropped from 885 MPa to 478 MPa for 309 L and from 799.9 MPa to 564 MPa for 347L respectively.The characteristics on low frequency fatigue with short-crack had been investigated.The formula da/dN =C(ΔJ)n was used to calculate the propagation rate(da/dN) in three stages and the conditional threshold value(ΔJth)of the fati gue crack.The results showed that the ΔJth of specimen after thermal hydrogen charged dropped obviously and the da/dN increased.In addition,t he fracture morphology of SSRT and different crack propagation mechanism of low frequency fatigue in three propagation stages had been observed by SEM.

Key words： structure material weld overlay cladding thermally cha rging hydrogen SSRT low frequency fatigue

收稿日期: 2001-10-08

ZTFLH:

TG113.25

通讯作者: 钟曼英

Corresponding author: Manying Zhong

	服务

	把本文推荐给朋友
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章
	徐坚
	钟曼英
	郭世行
44.8K

引用本文:

徐坚; 钟曼英; 郭世行 . 加氢反应器壁材料的氢损伤特性[J]. 中国腐蚀与防护学报, 2003, 23(3): 149-155 .
Jian Xv, Manying Zhong, Shixing Guo. CHARACTERISTICS OF HYDROGEN DAMAGES FORHYDROGENATION REACTOR WALL-MATERIALS. J Chin Soc Corr Pro, 2003, 23(3): 149-155 .

链接本文:

https://www.jcscp.org/CN/ 或 https://www.jcscp.org/CN/Y2003/V23/I3/149

[1]CuiJiaolin,XuJian.Thepropagationalbehavioursofshort-cracksof2.25Cr-1Mosteelinhydrogen[J].Mater.Mech.Eng.,1999,23(1):15-17(崔教林,徐坚.在氢环境中2.25-1Mo钢短裂纹扩展行为研究[J].机械工程材料,1999,23(1):15-17)
[2]HanGuangwei,SongYujiu.Effectofhydrogenatomofinitiationandpropagationofcracksunderslowloading[J].ActaMetall.Sin.,1994,30(10):A448-452(韩光炜,宋余九.慢加载条件下氢对裂纹萌生与扩展的作用[J].金属学报,1994,30(10):A448-452)
[3]LiJianli,LiXiaogang,XieGenshuan,etal.Fatiguepropertiesfor20 gand2.25Cr-1Mosteelafterhydrogenattack[J].Actametall.Sin.,1995,31(1):B26-30(郦建立,李晓网,谢根栓等.20 g和2.25Cr-1Mo钢氢腐蚀后的疲劳性能[J].金属学报,1995,31(1):B26-30)
[4]XuJian,HardieD ,ZhongManying.Effectofhydrogenonthebe haviourofstainlesssteelweldoverlaycladdingappliedtolowalloysteel[J].J.Chin.Insti.Metrology,2000,1:16-21(徐坚,D .Hardie,钟曼英.氢对低合金钢上不锈钢堆焊层性能的影响[J].中国计量学院学报,2000,1:16-21)
[5]PanChuan,LiZhengbang,TianZhiling.Hydrogenembrittlementofweldmetalofausteniticstainlesssteel[J].ActaMetall.Sin.,2001,37(9):985-990(潘川,李正邦,田志凌.不锈钢焊缝金属的氢脆[J].金属学报,2001,37(9):985-990)
[6]PanChan,LiZhengbang,LiangTongge.Thethresholdstressinten sitiesforhydrogen-induceddelayedfailureofweldmetalofausteniticstainlesssteel[J].ActaMetall.Sin.,2001,37(3):296-300(潘川,李正邦,梁东阁.奥氏体不锈钢焊缝金属氢致滞后断裂门槛值的研究[J].金属学报,2001,37(3):296-300)
[7]PetersonRE .StressConcentrationFactors[M ].NewYork:JohnWiley&Sons,1953
[8]ZhongManying,WangXiaolin.Characteristicsoflowfrequencyfa tiguewithshort-crackfor16Mnsteelinhydrogen[J].J.Chin.Soc.Corros.Prot.,1996,16(2):59-63(钟曼英,王晓林.在氢环境中16Mn钢的短裂纹低频疲劳特性[J].中国腐蚀与防护学报,1996,16(2):59-63)
[9]XuJian,DaiXinmin,XiaZaizhu.CorrosionMetallurgy&Anti-CorrosionMetallicMaterials[M ].Hangzhou:ZhejiangScience&TechnologyPress,1981(徐坚,戴新民,夏再筑.腐蚀金属学及耐腐蚀金属材料[M ].杭州:浙江科技出版社,1981)
[10]ChuWuyang.HydrogenDamageandDelayedFracture[M ].Bei jing:MetallurgicalIndustryPress,1988(褚武扬.氢损伤与滞后断裂[M ].北京:冶金工业出版社,1988)

[1]	徐松;吴欣强;韩恩厚;柯伟. 316Ti不锈钢在模拟核电高温高压水中的腐蚀疲劳裂纹断口研究[J]. 中国腐蚀与防护学报, 2010, 30(2): 119-123.

Viewed

Full text

Abstract

Cited

Shared

Discussed