S tudy on V ariation of L ow T emperature T oughness of M n2S teel
SHI Qiuying
LU Dengyao
Abstract：The impact toughness of Mn2 steel in different heat treatment process, different temperature and different sample status is carried on the detailed analysis and research. The results showed that:CM690 steel in 900℃heat and preservation 90 min water quenching, 600 ℃ heat and preservation 90 min water tempering, under the condition of meet the requirements of ensuring the strength of the steel can obtain good toughness;During the quenching temperature exceeds 30℃, because steel hardening ability to drop, will strongly decrease the strength and toughness of steel;Adding 0.015%-0.025%of Ti in steel, can significantly improve the impact toughness value 35-40 J;For CM490 steel, if after rolling the air cooling or heap cooling, due to the low cooling speed, will be a mixture of ferrite + pearlite + bainite, which is not conducive to improve the toughness of the steel, and after normalizing its organization mixture is ferrite+bainite, its impact value is higher three to five times than the first two state.
Keywords：anchor chain steelMn2 steellow temperature toughnessheat treatmentmicroalloying
Publication Date：2014-03-02
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：5( 29-33 )