Investigation of microstructure and property of Cr21 type low-nickel duplex stainless steel
Two sorts of Cr21 type duplex stainless steel (DSS)containing 1.2% Ni and 0% Ni were designed and investigated.The results showed that yield stress of Cr21 DSS reached 450 MPa,being twice of 304 austenite stainless steel.Impact energy of nickel-free DSS (LND1)at room temperature was about 89 J (sub-sized).At -20℃,impact energy was reduced to 24J.Note that for DSS containing 1.2% Ni (LND2),impact energy at 20℃ was as high as 92 J.This indicated that Ni was the critical element for increasing impact property at low temperature.The paper also revealed that over 1000℃,impact energy decreased with increase annealing temperature due to volume of austenite phase deceased.Meantime,refinement of austenite phase would increase impact energy of Cr21 type DSS.
duplex stainless steel Cr21 impact energy low-nickel
Zhang Wei Jiang Laizhu Song Hongmei Hu Jincheng
Technology Centre for Stainless Steel,Baosteel Research Institute,Baoshan Iron & Steel Co.,Ltd.,Shan Technology Centre for Stainless Steel,Baosteel Research Institute,Baoshan Iron & Steel Co.,Ltd.,Shan
国际会议
上海
英文
741-745
2008-09-26（万方平台首次上网日期，不代表论文的发表时间）