摘要
通过对时效条件下Super304H钢的微观组织分析,研究了Super304H钢组织变化对韧性的影响。结果表明:Super304H钢在600～700℃的时效温度范围内,随温度升高组织中析出相数量不断增加,但不同析出相的数量增加趋势不同,Nb(C,N)的数量呈缓慢增加趋势,而M23C6的数量先快速增加然后增加幅度趋缓。随M23C6析出量增大,冲击功相应降低,因此M23C6沿晶析出应是Super304H钢时效脆化的主要原因。
Effect of microstructure evolution on toughness of Super304H steel was investigated by analyzing the microstructure of Super304H steel experienced by aging treatment.The results show that the amount of precipitates increases with the increase of aging temperature.Moreover,the increasing trend of the amount varies for different kind precipitates.The amount of Nb（C,N） shows a slow increasing trend but the amount of M23C6 increases rapidly then slows down.Corresponding to the increasing trend of M23C6,the impact toughness of M23C6 decreases.Thus,the aging embrittlement of Super304H steel is due to the intergranular precipitation of M23C6.
出处
《金属热处理》
CAS
CSCD
北大核心
2011年第11期33-36,共4页
Heat Treatment of Metals
基金
山东电力集团公司重点科技项目(2007A-47)
