核電用TP304不銹鋼方管成型方法研究

Research on Formation Process for TP304 Stainless Steel Square Pipe for Nuclear Power Service

摘要: 通過(guò)變形力計(jì)算、有限元模擬分析、工藝試驗(yàn)等方法,對(duì)一種應(yīng)用在AP1000核反應(yīng)堆上的TP304不銹鋼方管的成型方法進(jìn)行了研究,開(kāi)發(fā)出一種熱擠壓荒管在定徑定壁后,經(jīng)第1道次空拔、第2道次襯拉,最終制成方管的成型工藝,并確定了各項(xiàng)工藝參數(shù)。研究表明:采用固定模拉拔法生產(chǎn)核電用TP304不銹鋼方管是可行的,且成品材質(zhì)性能均勻一致,尺寸精度高。

Abstract: The formation process for the TP304 stainless steel square pipe as applied to the AP1000 nuclear reactor is studied by means of such methods as deformation force calculation,finite element analysis,and technology testing,etc. As a result,a new formation process for the said pipe is developed,and the operation steps are:with the first pass,the hot-extruded blank pipe as sized is sink drawn,and with the second pass,the pipe is dawn with a mandrel,and finally it is turned into a square pipe as required. Moreover,all the parameters of the formation process are determined. The study shows that it is practical to employ the fixed-die drawing process to produce the TP304 stainless steel square pipe for nuclear power service,and that the finished product is in possession of material property homogeneity and high dimensional accuracy.