Abstract： Effects of tempering on microstructure and mechanical properties of new HB450 lowalloy abrasion resistant steel were investigated by transmission electron microscopy (TEM) and utilizing scanning electron microscopy (SEM), and the mechanisms of reinforcement in strength and toughness were also analyzed. Results show that tempering has considerable influence on both hardness and strength. When tempering temperature is from 200℃ to 250℃, the mechanical properties meet the demands of NM450 at GB /T 24186—2009. The hardening phenomenon occurs at the tempering temperature of 250℃. TEM analyses shows that besides the precipitate of εcarbide, some of the 30 to 50nm（Nb,Ti）（C,N） particles also precipitate in the original austenite grain boundaries and martensite lath beam, which played a large role on strengthening for the test steel.
收稿日期: 2010-04-06
出版日期: 2011-05-15
引用本文:
邓想涛，王昭东，张逖，袁国，付天亮，王国栋. HB450低合金超高强耐磨钢回火过程中的组织性能演变[J]. 钢铁, 2011, 46(5): 60-63.
DENG Xiangtao1,WANG Zhaodong1,ZHANG Ti2,YUAN Guo1,FU Tianliang1,WANG Guodong1. Microstructure and Properties Evolution of HB450 UltraHigh Strength LowAlloy Abrasion Resistant Steel During Tempering. Iron and Steel, 2011, 46(5): 60-63.
2011, Vol. 46 
