回火温度对低碳贝氏体钢AH80DB冲击韧性的影响  

EFFECT OF TEMPERING TEMPERATURE ON IMPACT TOUGHNESS OF LOW CARBON BAINITIC STEEL AH80DB

作　　者：吴金跃[1] 赵贤平[1] 窦玉香[1] 杨柳[1] 陈新慈[1] 王志国[1] 

机构地区：[1]安阳钢铁集团有限责任公司

出　　处：《河南冶金》2012年第4期36-38,共3页Henan Metallurgy

摘　　要：研究了低碳贝氏体钢AH80DB不同回火温度对冲击韧性的影响。研究结果表明,在250℃左右M/A岛开始分解,300℃～350℃分解数量多,尺寸大,且沿晶界分布,发生了回火脆性,导致冲击韧性差。随着回火温度的升高,M/A岛的分解在500～550℃基本完成,冲击韧性逐渐升高。Effect of different tempering temperature on impact toughness of low carbon bainitic steel AH80DB is inves- tigated. The results show that the M/A islands start to decompose at about 250 ℃ and decompose greatly between 300℃ - 350 ℃ with large grain along boundary which leads to bad impact toughness from temper brittleness. With the tempering temperature rise, the resolve of M/A islands basically complete within 300 ℃ - 350 ℃, then the impact toughness gradual- ly rise.

关 键 词：回火温度 AH80DB 冲击韧性M/A岛 回火脆性 

分 类 号：TG156.5[金属学及工艺—热处理]