Main pipelines of Hua-long Pressurized Reactor(HPR1000)are made of X2CrNiMo 18.12(CN),an ultra-low carbon austenitic nitrogen control stainless steel,with low carbon content,high chromium and nickel contents and narrow range,especially the content of N is difficult to be controlled,with very tough quality requirements.In addition,the weight of ingot for main pipeline is more than one hundred tons,the composition segregation is likely to occur.Based on the analysis and research on composition segregation of electroslag ingot for large main pipelines,the control method for the composition uniformity of large single-phase electroslag ingot is described,and good results have been achieved.
关键词
HPR1000/核电主管道/超低碳控氮奥氏体不锈钢/X2CrNiMo18.12(CN)/成分均匀性
Key words
main pipelines of HPR1000 nuclear power station/ultra-low carbon austenitic nitrogen control stainless steel/X2CrNiMo18.12(CN)/composition uniformity control
维普
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