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总览 评价 王晶 1，* ， 张亦良 1， ， 仇飞 1， ， 吴道文 2， （ 1、 北京工业大学机电学院，北京 100124； 2、 洛阳双瑞特种设备有限公司； ） 摘要： 为防止换热器等设备发生应力腐蚀，工程上试采用在与腐蚀介质接触的表面堆焊2205双相不锈钢。为探索方
王晶1，*， 张亦良1，， 仇飞1，， 吴道文2，
（
1、北京工业大学机电学院，北京 100124； 2、洛阳双瑞特种设备有限公司； ）
摘要：
为防止换热器等设备发生应力腐蚀，工程上试采用在与腐蚀介质接触的表面堆焊2205双相不锈钢。为探索方案的应用范畴与可行性，对两种焊接工艺（自动焊及焊条电弧焊）、3种工程上常见腐蚀环境（饱和硫化氢、氯化镁、氯化钙），通过恒负荷拉伸试验方法及断口微观分析手段，综合评价其应力腐蚀性能，并根据试验结果建立应力-寿命数学模型。结果表明：饱和硫化氢环境中恒负荷拉伸门槛值：自动焊为0.45ReL、焊条电弧焊为0.4ReL，二者相差17%。氯化钙环境中0.9ReL应力下96小时试验后所有试样完好，显示出优良的抗氯化钙应力腐蚀能力. 而该材料则不适于在沸腾氯化镁环境下工作。?????
关键词：
双相不锈钢；堆焊；应力腐蚀
WANG Jing1,*， ZHANG Yiliang1,， QIU Fei1,， WU Daowen2,
（
1、College of Mechanical Engineering and Applied Electronics Technology, Beijing University of Technology, Beijing 100124； 2、Luoyang Shuangrui Special Equipment CO., LED, Luoyang 471003； ）
Abstract：
In order to prevent stress corrosion in petrochemical facilities, try to weld 2205 duplex stainless steel on the surface contact with the corrosive media in projects. To explore the application scope and feasibility of the solution ,two welding processes (automatic welding and manual welding), three kinds of the common corrosion environment (saturated hydrogen sulfide, magnesium chloride, calcium chloride) are studied by constant load tensile and micro-fracture analysis methods, evaluate its stress corrosion comprehensively and establish the mathematical model of stress - life based on the experimental results. The results indicate that: constant tensile load threshold: automatic welding is the 0.45RP0.2, manual welding is the 0.4RP0.2 in saturated H2S environment, and the difference is 17%;all the samples remain intact after 96 hours in 0.9 RP0.2 stress test of the calcium chloride environment, showing excellent resistance to chloride stress corrosion. While the material doesn't work well in boiling magnesium chloride environment.
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