Improving Strain Hardening Capacity and Abrasion Resistance of Chromium-Boron Alloyed 13% Manganese Steel
Resistance against gouging and abrasive wear in impact crushing arms cast from Mn-steel,is related to variations of carbon,manganese and the microstructure of the cast steel.Additions of Boron,molybdenum and chromium to the plain Mn-steel casts (0.8-1.4%C-13%Mn) increase its wear resistance and fatigue life time during crushing operation due to enhancement of its strain hardeing capacity,grain refinement and strengthening by solid solution hardening of the matrix.This improvement is due to the intended change in the microstructure where precipitation of boron carbides and chromium carbides inside the austenitic matrix,grain refinement and increasing soluble carbon content in austenite phase is occurred.Solution treated Mn-steels (105℃ 0,2h,WQ) alloyed with boron showed crushing capacity of about 600~850 tones basalt per set depending on their compositions.The hardness of the as water quenched austenite is increased by about 25% to reach 397 HB when alloyedwith 0.37% B.However work hardened matrix of Cr+Mo+B modified Mn-steel impact arms showed a bulk hardness of about 498 HB.The fatigue resistance of boron alloyed steel is increased to about 1.4 times over that measured for plain Mn-steel.
chromium-manganese steel boron addition-abrasion resistance solution treatment work hardening capacity grain refinement-microstructure fatigue resistance-second phase fine carbides
ELGHAZALY Waleed HASSAN Sayed
Reseacher, Steel Technology Lab., Central Metallurgical R&D Inst., P.O.B. 87, Helwan, Egypt Production Engineer, Siegwart Co., Helwan, Egypt
国际会议
成都
英文
115-118
2016-11-16（万方平台首次上网日期，不代表论文的发表时间）