Experiment and Production of 42CrMo(Ni)High Toughness Steel for Bolt
HAI Yan
MU Jingfei
YU Hongbo
Abstract：The 42CrMo(Ni)steel for high toughness bolt is produced by EAF-LF-VD-CCM at steelmaking plant, Shandong Shouguang Juneng Special Steel Co. Ltd. The addition of Ni can improve the low temperature impact toughness substantially. The alloy composition of Cr/Mo/Ni can refine the grain size and the control rolling process can make the steel having fine grain microstructure and the good integrative mechanical properties. Production practice and test show that the steel has fine grain size, lesser inclusion and better microstructure. The Charpy impact absorb energy at -100 ℃ can be more than 27 J and the average value increases 5 J compare with 42CrMo(B7)steel. All mechanical properties can meet the requirements of the customers.
Keywords：steel for bolt42CrMo(Ni)control rollinglow temperature toughness
Publication Date：2014-11-01
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：3( 14-16 )