共查询到18条相似文献,搜索用时 62 毫秒
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双相不锈钢S31803的焊接试验 总被引:1,自引:0,他引:1
在对双相不锈钢焊接接头热影响区性能特点进行分析的基础上,通过焊接试验,了解双相不锈钢S31803的焊接特点,确定双相不锈钢S31803的焊接工艺。 相似文献
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本文主要介绍了采用双相不锈钢S32760压制封头过程中应考虑的一些问题和注意点,同时介绍了S32760双相不锈钢的一些性能。 相似文献
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在对双相不锈钢焊接性能特点进行分析的基础上,通过焊接试验,了解双相不锈钢SAFUREX的焊接特点,确定双相不锈钢SAFUREX的焊接工艺。 相似文献
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双相不锈钢焊接接头的耐蚀性介绍 总被引:2,自引:0,他引:2
综述了双相不锈铜的焊接接头的耐蚀性研究进展,及采用的研究方法和已取得的成果。主要介绍了异种金属焊接接头的组织及其对双相不锈铜的耐蚀性能的影响.此外,还叙述了在焊接过程中,不同的热处理方式,不同的焊接工艺对双相不锈钢焊接接头的应力腐蚀、晶间腐蚀和点蚀的影响:结果表明:采用合适的输入热能量,进行多层焊接,选用Ar+2%N2作为混合保护气,采用手工电弧焊(SMAW)和钨极氩弧焊(TIG)相配合的方法,可以使得焊接接头具有优良的耐蚀性能。 相似文献
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董力莎 《化学工业与工程技术》2007,28(5):57-59
介绍了双相不锈钢管/板自动钨极氩弧焊焊接工艺参数,总结出合适的焊接工艺规范,对原管/板自动钨极氩弧焊机进行了改造,高质量地完成了双相不锈钢管/板的焊接。 相似文献
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PTA生产装置的PX氧化工段2205双相不锈钢设备和管线多次发生腐蚀泄漏。通过宏观分析,成分分析,金相分析,SEM扫描,EDS(色散谱)分析,对该工段泄漏原因进行分析,结果表明,管线中的乙酸蒸气和水蒸气冷凝,形成乙酸溶液并携带残渣对管壁造成冲刷腐蚀,最终造成管线的穿孔失效。 相似文献
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Electrochemical investigations of pitting corrosion behaviour of type UNS S31603 stainless steel in thiosulfate-chloride environment 总被引:1,自引:0,他引:1
The pitting corrosion behaviour of type UNS S31603 stainless steel (316L SS) in 0.01, 0.05 and 0.1 M thiosulfate ion (S2O3
2–) in the absence and presence of various concentrations of chloride ion (Cl–) was studied using the cyclic potentiodynamic polarization method. The influence of major factors which affect pitting corrosion such as pH and temperature, were also investigated. It was found that both the pitting potential (E
pit) and the repassivation potential (E
rp) decreased with increase in Cl– concentration and solution temperature and a more pronounced difference in E
pit values for various concentrations of S2O3
2– in 1.0 M Cl– was obtained at lower temperatures. The effect of pH on E
pit, E
corr and E
rp values for different concentrations of S2O3
2– in the presence of 1.0 M Cl– was also determined. 相似文献
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2205双相不锈钢在醋酸环境下的点蚀行为研究 总被引:2,自引:0,他引:2
2205双相不锈钢由于其具有良好的力学性能,耐腐蚀性能被广泛地应用石油化工设备和管道用材料和选材设计中。本文主要利用电化学极化曲线及交流阻抗技术研究了22Cr双相不锈钢在醋酸以及氯离子条件下耐点蚀行为。结果表明,22Cr双相不锈钢在醋酸环境下有良好的耐腐蚀性能,由于氯离子的存在,增大了该材料的腐蚀倾向,同时也进一步加大了发生点蚀的几率。 相似文献
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In this study, an optimized double loop electrochemical potentiokinetic reactivation (DL-EPR) test was applied to evaluate the degree of intergranular corrosion (IGC) susceptibility of duplex stainless steel UNS S31803. The measurement in a solution of 2 M H2SO4 + 1 M HCl at 30 °C with a scan rate of 1.66 mV s−1can successfully be used to analyze the interactions between precipitation, chromium depletion, and IGC sensitization of the UNS S31803 steel, which was aged between 30 min and 48 h at 800 °C. To gain an insight into the phase transition, the specimens were analyzed by scanning electron microscopy (SEM) and electron dispersive X-ray spectroscopy (EDX). The results indicated healing due to re-diffusion of Cr and Mo from the σ phase to the γ2 phase. 相似文献
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