OPTIMIZATION OF HIGH PERFORMANCE SPECIAL STEELS
Increasing demands with regard to performance of special steels necessitate the further development of process technology as well as steel metallurgy.The present paper exemplifies recent developments based on alloy modifications with microalloying elements enhancing the performance of special steel types.The focus is thereby on molybdenum alloyed carburizing grades that are typically applied e.g.in the powertrain of vehicles,machinery and power generation equipment.A dedicated addition of niobium enables better mechanical properties and higher carburizing temperatures.Simultaneously the carburizing time can be shortened and distortion by heat treatment is reduced,as the microstructure remains more homogeneous.Further development potential offered by microalloying in carburizing steels is seen in an improved toughness due to the finer sized grain structure allowing to produce higher strength and more economical steel.These measures when applied in new steel concepts enable significant cost savings along the entire manufacturing chain especially in the production of larger transmissions.Finally,additional cost savings can be expected by a reduction and optimization of processes and procedures at the end-user.
gear performance case carburizing molybdenum niobium hardenability tempering resistance grain refinement toughness fatigue micropitting
Hardy Mohrbacher NiobelCon bvba
Swaenebeecklaan 5,2970 Schilde,Belgium
国内会议
杭州
英文
557-563
2015-11-11（万方平台首次上网日期，不代表论文的发表时间）