摘要
将经过不同温度回火后的EA4T钢试样分别加工成夏比V型和U型缺口冲击试样,通过系列冲击试验对EA4T钢的回火脆性进行了研究。结果表明,EA4T钢冲击韧度随回火温度的升高而升高,在550℃左右回火具有高温回火脆性,在高于回火脆性温度区回火时,其冲击韧度将大幅度提高。回火脆性对夏比V尖锐缺口的敏感性更高。
Preparing Charpy V and U type impact samples of steel EA4T tempered at different temperature, respectively, the temper brittleness of steel EA4T was researched by a series of impact test on above samples. The results show that, with the increase of tempering temperature, impact toughness of steel EA4T rises, and there is high-temperature tempering brittleness at about 550 ℃. When the tempering temperature is higher than the region of temperature, the impact toughness value will improve greatly. Also found Charpy V type samples have higher sensitivity than U type impact samples for tempering brittleness.
出处
《铸造技术》
CAS
北大核心
2012年第3期302-303,共2页
Foundry Technology
基金
科技部<科技人员服务企业行动项目>资助项目(2009GJF20026)
关键词
EA4T钢
回火脆性
冲击韧度
steel EA4T
tempering brittleness
impact toughness
