Composition Segregation Control of ESR Ingot for Main Pipelines of HPR1000
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.
main pipelines of HPR1000 nuclear power stationultra-low carbon austenitic nitrogen control stainless steelX2CrNiMo18.12(CN)composition uniformity control
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