1、aA i#M q316L K 7 Y,y , (南京工业大学机械与动力工程学院,江苏南京210009)K 1:通过不同应变速率的拉伸试验,研究了316L不锈钢在不同温度和浓度的NaOH溶液中的应力腐蚀开裂行为,分析了以上三个因素对该钢应力腐蚀开裂的影响。结果表明:当应变速率为10-5 s-1时,316L不锈钢不会发生明显的应力腐蚀开裂,而当应变速率降低到10-6 s-1时,在高温低浓度的NaOH 溶液中该钢会发生明显的应力腐蚀开裂;当应变速率为10-6 s-1时,NaOH 溶液温度对316L不锈钢应力腐蚀开裂的影响程度要高于浓度的。1oM:316L不锈钢;应力腐蚀开裂;NaOH溶液ms |:T
2、G172 DS :A cI|:1000-3738(2009)05-0026-03InfluencesofConcentration,TemperatureandStrainRateonStressCorrosionCrackingof316LStainlessSteelinAlkaliSolutionatHighTemperatureJIANGYong, GONGJian-ming, ZHOURong-rong(Nanjing University of Technology, Nanjing 210009, China)Abstract:Stress corrosion cracking(S
3、CC)behavior of 316L stainless steel in NaOH solutions with differentconcentrations was investigated by using tension test at different strain rates and temperatures.And the effects ofabove three factors on stress corrosion cracking wereanalyzed.The results show that at the strain rateof 10-5 s-1 ,SC
4、C of 316L stainless steel was not obvious, while the strain rate decreased to 10-6 s-1 , SCC of 316L stainless steelin alkali solution at high temperaturewas remarkable.Effect of temperature of NaOH solution on SCC of 316L steelwas more remarkable than solution concentration at 10-6 s-1 .Keywords:31
5、6L stainless steel;stress corrosion cracking;NaOH solution0 :2008-10-29Te:(1974-), 3, Z ,p V 3。 =:y qY1 。E Y#Q? 3, E316L |304L。316L 0 K ?, im-aA iaA,316L f8( 304、316) ?3 K 7 2-3 , “ - M qHq/ iaA K 7 Y7n。N,TYVM qHq/ M q % k, M qNaOH A# i316L K 7 Y。1 k“! kZEk 316L f8, 10 mm, s( s / %)0.018C,2633 5 200
6、9 M5机 械 工 程 材 料Materials for Mechanical EngineeringVol.33 No.5May 200916.748Cr, 0.444Cu,1.626Mn,2.138Mo,10.228Ni,0.033P,0.002S,0.314Si;1 ?b =579 MPa,s =290 MPa,E =200 GPa。 % k“ AZ_ |, jnm1。m1 k“jFig.1 Configurationanddimensionofthe specimenk -,M | k“S s)u1000#, 50%Y?+50%d(8s)A b!, 0 !i8,b 2 !。 % kCO
7、RTEST T M q % k“d NaOH A, k“d2.2 LC-276 F /,K T350 , 22 MPa。 ksY10,20,50 g L-1NaOH A, AsY |200,250280 ,M q110-5 s-1110-6 s-1 。 k“ gJSM6360AV (SEM)s。2 kT) 2.1 316L K M q % kn , 8, IX 1 kZ F, kTnm2,3V1。(a) 10 gL-1 (b) 20 gL-1 (c) 50 gL-1m2 iNaOH A110-5s-1Hq/316L - % q wLFig.2 Stress-elongationcurvesof
8、 316LstainlesssteelindifferentNaOHsolutionsat thestrainrateof 110-5s-1(a) 10 gL-1 (b) 20 gL-1 (c) 50 gL-1m3 iNaOH A110-6s-1Hq/316L - % q wLFig.3 Stress-elongationcurvesof 316LstainlesssteelindifferentNaOHsolutionsat thestrainrateof 110-6s-1 D4 , K y0F() aA/316L K 7 ,F() v, K 7 ,fk.X80o5H2S K 7 J . F
9、,2006,34(8):7-10. 4 g, ,f.X805Loh ; _ K k J . ,2006,23(7):15-18. 5 g, , .X805LpH A K 7 J .?v,2007,40(6):757-760. 6 g, ,f.X805LohSSCC# E J .o,2007,28(1):73-76. 7 ,yD,.y X805LNS4 AKY J . !,2007,4(3):17-20. 8 f!, , j.X805L _ 7 gs J . ,2004,28(3):13-15. 9 ,S ,g,.X70 r E A K J . ,2008,44(2):209-214. 10 fl ,2 ,u.X805LF ? J .+ y,2006,27(3):11-13.( 28:)2 l . K K/ M .:,1988:445-447.3 i. ! s J . F K,2004,21(1):33-36. 4 D . K M .: S/ , 1993:15-17. 5 =, S. K/ M .:S ,2004:29.32R ,:X805L r E A K
