从互感器误差校验、电能计量统计和电能计量系统整体校验3个方面对光学电流互感器的现场运行性能进行客观评价。投运前和运行中期的误差校验数据显示,变差小于0.1%,满足0.2S级要求。建立2套独立计量系统,在实际现场运行条件下进行长期数据比对,反映数字电能计量系统在各种环境因素影响下的长期运行稳定性。通过对数字电能计量系统的整体校验,在额定功率条件下不确定度达到9.0×10-5,置信概率达到97.15%,系统综合误差为1.013%,满足规程要求。
In order to study the corrosion behaviors and the effects of compositions, inclusions and microstructures on corrosion resistance of joints, new type anti-corrosion E36 steels were welded by the anti-corrosion solid wires. The results show that the mechanical properties of joints are good enough to satisfy the standards of international association of classification societies. The microstructures of base metal dominantly consists of pearlite and banded ferrite, and heat affect zone of bainite, and weld metal of acicular ferrite, bainite and lath ferrite. There are no dis- continuous surfaces （e. g. , steps） between the base metal and weld metal. However, the corrosion resistance of weld metal is better than that of base metal and heat affect zone, and the corrosion resistance of heat affect zone is the worst. Besides, inclusions serve as the pitting initiation in weld metal.
参考文献
| [1] | 孔小东,杨明波,童康明,朱梅五.焊接工艺对低合金海洋用钢焊接接头耐蚀性的影响[J].兵器材料科学与工程,2007(05):9-13. |
| [2] | Kashima K;Tanino Y;Kubo S.Development of Corro-sion Resistant Steel for Cargo Oil Tanks[A].Osaka:Osaka University,2007:6. |
| [3] | Shiro Imai;Kenji Katoh;Yuji Funatsu.Development ofNew Anti-Corrosion Steel for Cots of Crude Oil Carrier[A].Osaka:Osaka Universi-ty,2007:11. |
| [4] | 崔忠圻;覃耀春.金属学与热处理[M].北京:机械工业出版社,2007 |
| [5] | Avazkonandeh-Gharavol M H;Haddad-Sabzevar M;HaerianA.Effect of Copper Content on the Microstructure and Me-chanical Properties of Multipass MMA,Low Alloy Steel WeldMetal Deposits[J].Materials & Design,2009(30):1908. |
| [6] | 张春亚,陈德斌,陈学群,费喜明,CHEN De-bin,CHEN Xue-qun,FEI Xi-ming.低碳钢的点蚀诱发敏感性研究[J].海军工程大学学报,2001(03):1-6,37. |
| [7] | 肖珩;黄振中;汪崧 等.新型耐海水腐蚀低合金钢10CrCuSiV锈层分析研究报告[J].北京科技大学学报,1997,9(05):476. |
| [8] | 黄安国;李志远;余圣甫 等.低合金钢焊缝金属的腐蚀行为[J].焊接报,2005,26(11):33. |
| [9] | 孔小东,杨明波,朱梅五.不同合金化体系的合金钢焊接接头的耐蚀性比较[J].热加工工艺,2010(13):34-37. |
| [10] | 曹国良,李国明,陈珊,常万顺,陈学群.典型耐海水腐蚀钢中Ni和Cr耐点蚀作用的比较[J].金属学报,2010(06):748-754. |
| [11] | 曹国良,李国明,陈珊,常万顺,陈学群.Ni-Cu-P钢耐点蚀性能的机理研究[J].材料工程,2010(08):38-43. |
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