摘要
采用自约束热疲劳试验方法,研究了不同V/C对铸造热作模具钢热疲劳性能的影响,并对比研究了铸造热作模具钢和H13钢的热疲劳性能。结果表明,铸造热作模具钢的热疲劳属高周热疲劳,其热疲劳性能取决于钢的热强性和热稳定性。随着V/C增加,热疲劳抗力先增后减,当V/C比为3.0时,组织中析出了细小弥散的VC,改善了钢的热强性和热稳定性,热疲劳抗力最高。铸造热作模具钢的热疲劳性能明显高于H13钢。
Thermal fatigue property of the cast hot-work die steels with different V/C was investigated with the self-restricting test method. The thermal fatigue behavior of the cast hot-work die steel and H13 steel was also contrasted. The results indicate that the thermal fatigue of the cast hot-work die steel is high-cycle thermal fatigue, therefore the main factor affecting thermal fatigue resistance is thermal strength and thermal stability. With V/C rising, thermal fatigue resistance increases first and then decreases. As V/C is 3.0, thermal stability and thermal strength of the cast hot-work die steel are improved because of dispersed VC in the microstructure, thus thermal fatigue resistance reach maximum. It is found that the thermal fatigue property of the cast hot-work die steel is better than that of H 13 steel.
出处
《铸造》
EI
CAS
CSCD
北大核心
2007年第3期251-254,共4页
Foundry
基金
国家计委产业化前期关键技术与成套设备研制开发项目(1999317)
江苏省高校省重点实验室开放项目(Kjsmcx04004)。
关键词
铸钢
热作模具
热疲劳
V/C
cast steel
hot-work die
thermal fatigue
V/C
