Study on Manufacture and Application of Alloy Cast Iron Pinch Roller
Author of the article:CHENG Li;XU Jiaxiong;AN Ping
Author's Workplace：Wuhan Iron and Steel Co.,Ltd.,Wuhan 430083,China;Hubei Jingli Electromechanical Technology Co.,Ltd.,Huanggang 438000,China
Key Words：pinch roll cast iron heat treatment hardness tensile strength
Abstract：The influence of different heat treatment processes on the microstructure and mechanical properties of alloy cast iron pinch roller was studied by orthogonal test method,the optimum heat treatment process parameters were determined,and the alloy cast iron pinch roller with high hardness and wear resistance was manufactured.The results show that the optimum heat treatment processes are:quenching temperature 870℃,heat preservation time 1 h;tempering temperature 220℃,holding time 4 h.At this time,the hardness of the alloy reach 55.92 HRC,37%higher than that of the as-cast alloy,and the tensile strength is 502 MPa,satisfying the performance requirements of the pinch and feed roller.The production line has verified that the parts of the pinch roller are suitable for the rolling of high strength steel,low temperature duplex steel,pipeline steel and other steel products,with an average steel volume of 78800 tons and a significantly reduced production cost.
