时效温度对17-4PH不锈钢在工业废硫酸溶液中腐蚀行为的影响
Effect of Aging Temperature on Corrosion Behaviors of 17-4 PH Precipitation-hardening Stainless Steel in Waste Sulphuric Acid
摘 要
17-4PH沉淀硬化不锈钢经适当的热处理后具有优良的综合性能,常用于石油、化工、航天航空等领域.本工作研究时效温度对17-4PH不锈钢力学性能及在工业废硫酸溶液中腐蚀行为的影响,结果表明:随着时效温度升高,17-4PH不锈钢屈服强度和抗拉强度下降,断面收缩率和延伸率增加:其冲击断口形貌由脆性断裂逐渐过渡为韧性断裂:自腐蚀电位关系为E550 ℃>E620 ℃>E580 ℃.浸泡试验结果表明,经550 ℃时效处理的17-4PH具有较好耐蚀性能,620 ℃次之,580 ℃最差.
17-4PH stainless steel
aging treatment
polarization curve
waste sulphuric acid
corrosion behavior
Abstract
After aging treatment 17-4PH stainless steel has excellent mechanical properties and good corrosion resistance,and is extensively used in the filed of petrochemical engineering,chemical engineering and aerospace.In this paper,the effect of the aging temperature on the mechanical properties and corrosion behaviors of the 17-4PH stainless steel in waste sulphuric acid was investigated.The results showed that with the increase of aging temperature,the yield stress and the tensile stress of the 17-4PH stainless steel decreased,and the reduction of area and elongation increased.The fracture mode transformed from brittle fracture to ductile fracture.The free corrosion potentials of 17-4PH stainless steels after different aging temperature were E550 ℃>E620 ℃>E580 ℃.The immersion experiments showed that the corrosion resistance of the 17-4PH stainless steels aged at 550 ℃ was best,at 620 ℃ was second and at 580 ℃ was last.
中图分类号 TG172.6
所属栏目 试验研究
基金项目 贵州省工业攻关重点项目(No.20103016);瓮福集团有限责任公司博士后项目
收稿日期 2010/8/15
修改稿日期 2010/8/25
网络出版日期
作者单位点击查看
备注向嵩,副教授.
引用该论文: XIANG Song,WANG Jiang-ping,XIE Tian,YAN Yong-you,LI Yan-li. Effect of Aging Temperature on Corrosion Behaviors of 17-4 PH Precipitation-hardening Stainless Steel in Waste Sulphuric Acid[J]. Corrosion & Protection, 2010, 31(12): 909～912
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参考文献
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【2】Li P,Cai Q Z,Wei B K,et al.Effect of aging temperature on erosion-corrosion behavior of 17-4PH stainless steels in dilute sulphuric acid slurry[J].Journal of Iron Steel Research,International.2006,13(5):73-78.
【3】Zakeri M,Bahrami A,Mousavi Anijdan S H.Using genetic algorithm in heat treatment optimization of 17-4PH stainless steel mater[J].Materials and Design,2007,28:2034-2039.
【4】Esfandiari M,Dong H.The corrosion and corrosion-wear behaviour of plasma nitrided 17-4PH precipitation hardening stainless steel[J].Surface & Coatings Technology,2007,202:466-478.
【5】Liu R L,Yan M F,Wu D L.Microstructure and mechanical properties of 17-4PH steel plasma nitrocarburized with and without rare earths addition[J].J Mater Processing Techno,2010,210:784-790.
【6】Wang J,Hong Z,Li C,et al.The microstructure evolution of type 17-4PH stainless steel during long-term aging at 350 ℃[J].Nucl Eng Des,2006,236:2531- 2536.
【7】黄根良.17-4PH 沉淀硬化不锈钢的组织和性能研究[J].钢铁,1998,33(4):44-46.
【8】夏晓玲,李玉清,吴大茂.不同热处理对17-4PH 钢过时效组织与性能的影响[J].材料科学与工艺,1997,5(2):106-110.
【9】彭艳华,王均,邹红.17-4PH不锈钢长期时效对拉伸性能的影响[J].核动力工程,2007,28(3):82-89.
【10】赵义,郭亚欢,侯凯.热处理工艺对17-4PH不锈钢力学性能的影响[J].机械工程材料,2009,33(5):5-8.
【11】Dong H,Esfandiari M,Li X Y.On the microstructure and phase identification of plasma nitrided 17-4PH precipitation hardening stainless steel[J].Surface & Coatings Technology,2008,202:2969-2975.
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